CA2034488C - Cleaning compositions - Google Patents
Cleaning compositionsInfo
- Publication number
- CA2034488C CA2034488C CA002034488A CA2034488A CA2034488C CA 2034488 C CA2034488 C CA 2034488C CA 002034488 A CA002034488 A CA 002034488A CA 2034488 A CA2034488 A CA 2034488A CA 2034488 C CA2034488 C CA 2034488C
- Authority
- CA
- Canada
- Prior art keywords
- cleaning
- water
- group
- rinsing
- polyorganosiloxane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 160
- 239000000203 mixture Substances 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 150
- 239000012459 cleaning agent Substances 0.000 claims abstract description 149
- 239000004094 surface-active agent Substances 0.000 claims abstract description 49
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 125000000962 organic group Chemical group 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 62
- -1 polymethylene Polymers 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 11
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 9
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 8
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 8
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 8
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 8
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 7
- 125000005396 acrylic acid ester group Chemical group 0.000 claims description 7
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims 6
- 125000005702 oxyalkylene group Chemical group 0.000 claims 2
- 239000002699 waste material Substances 0.000 claims 2
- 238000011437 continuous method Methods 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 238000009210 therapy by ultrasound Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 11
- 230000006378 damage Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011109 contamination Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 27
- 239000003960 organic solvent Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- 239000003921 oil Substances 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 10
- 229920001296 polysiloxane Polymers 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 239000002736 nonionic surfactant Substances 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000002280 amphoteric surfactant Substances 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 239000003945 anionic surfactant Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 238000010907 mechanical stirring Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 229910007161 Si(CH3)3 Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- NRTJGTSOTDBPDE-UHFFFAOYSA-N [dimethyl(methylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane Chemical compound C[SiH2]O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C NRTJGTSOTDBPDE-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000011532 electronic conductor Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 3
- 229920002114 octoxynol-9 Polymers 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 150000005846 sugar alcohols Polymers 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical class CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 2
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- ZFJFYUXFKXTXGT-UHFFFAOYSA-N [dimethyl(methylsilyloxy)silyl]oxy-[dimethyl(trimethylsilyloxy)silyl]oxy-dimethylsilane Chemical compound C[SiH2]O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C ZFJFYUXFKXTXGT-UHFFFAOYSA-N 0.000 description 2
- 150000005215 alkyl ethers Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000002529 flux (metallurgy) Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical class C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 2
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229940082004 sodium laurate Drugs 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- FFJCNSLCJOQHKM-CLFAGFIQSA-N (z)-1-[(z)-octadec-9-enoxy]octadec-9-ene Chemical compound CCCCCCCC\C=C/CCCCCCCCOCCCCCCCC\C=C/CCCCCCCC FFJCNSLCJOQHKM-CLFAGFIQSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical class COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical class CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical class CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical class CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- YEYKMVJDLWJFOA-UHFFFAOYSA-N 2-propoxyethanol Chemical class CCCOCCO YEYKMVJDLWJFOA-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 102100038916 Caspase-5 Human genes 0.000 description 1
- 239000004129 EU approved improving agent Substances 0.000 description 1
- 101100112336 Homo sapiens CASP5 gene Proteins 0.000 description 1
- 101100273286 Mus musculus Casp4 gene Proteins 0.000 description 1
- SUZRRICLUFMAQD-UHFFFAOYSA-N N-Methyltaurine Chemical compound CNCCS(O)(=O)=O SUZRRICLUFMAQD-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- YFCGDEUVHLPRCZ-UHFFFAOYSA-N [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C YFCGDEUVHLPRCZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
- 238000001599 direct drying Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- HTDJPCNNEPUOOQ-UHFFFAOYSA-N hexamethylcyclotrisiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O1 HTDJPCNNEPUOOQ-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 125000006353 oxyethylene group Chemical group 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
- C11D3/3734—Cyclic silicones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D12/00—Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/29—Sulfates of polyoxyalkylene ethers
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/34—Derivatives of acids of phosphorus
- C11D1/347—Other P-containing anionic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/88—Ampholytes; Electroneutral compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/162—Organic compounds containing Si
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
- C11D3/3738—Alkoxylated silicones
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
- C11D3/3742—Nitrogen containing silicones
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/43—Solvents
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5009—Organic solvents containing phosphorus, sulfur or silicon, e.g. dimethylsulfoxide
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/032—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing oxygen-containing compounds
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Abstract
A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula:
... ... ... (I) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula:
... ... ... (I) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula:
Description
20344~8 This invention relates to cleaning compositions which will replace cleaning agents containing an organic solvent including freon* and the like.
In manufacturing various parts such as metal parts, plated and coated parts, and electronic and semiconductor parts, freon* containing solvents such as freon* 113, and organic solvents such as trichloroethane, trichloroethylene, tetrachloroethylene, and carbon tetrachloride are widely used as cleaning agents for eliminating oil stains and the like.
The above organic solvent containing cleaning agents are also used as dewatering cleaning agents after having washed various parts with water in order to avoid the following problems that are associated with direct drying of water present on an object to be cleaned:
(1) Heating (100C or more) which entails energy loss;
In manufacturing various parts such as metal parts, plated and coated parts, and electronic and semiconductor parts, freon* containing solvents such as freon* 113, and organic solvents such as trichloroethane, trichloroethylene, tetrachloroethylene, and carbon tetrachloride are widely used as cleaning agents for eliminating oil stains and the like.
The above organic solvent containing cleaning agents are also used as dewatering cleaning agents after having washed various parts with water in order to avoid the following problems that are associated with direct drying of water present on an object to be cleaned:
(1) Heating (100C or more) which entails energy loss;
(2) Reducing in productivity due to time taken in drying;
(3) Likely deformation of the object to be cleaned due to heating (thermal expansion that exceeds the tolerance);
and ~4) Increase in space for installing a cleaning system including a cooler and a heat shielding unit.
*trademark X
.
20344~
The term "dewatering cleaning agent" is used herein to denote a cleaning agent into which an object to be cleaned, which has been washed with water, is immersed or with which the object is rinsed by shower thereby to have water present on the object substituted by itself and then vaporized by air at room temperature or heated to 60C or less so that the object can be dried.
However, ever since it has been found that the destruction of the ozone layer by discharge of freon*
affects seriously the human body and the ecological system, the use of freons* such as freon* 12 and freon* 113 whose ozone destruction coefficients are high is on the gradual decline on a global scale for an eventual total ban.
Stricter regulations are imposed also on chlorine containing organic solvents such as trichloroethylene and tetrachloroethylene which are presumed to induce soil and underwater contaminations and the like.
Freons* whose ozone destruction coefficients are lower than the currently used freon containing solvents are being developed, some of which are under fabrication on a commercial basis. However, these new developments are not so welcome because they still are destroyers of the ozone layer.
*trademark - 20344~
What gradually attracts attention as a replacement for the above organic solvents is a surfactant-based water system cleaning agent which is free from environmental destruction and contamination. However, cleaning agents containing only surfactants are not satisfactory in penetrability, thereby not cleaning, e.g., stains penetrated into narrow portions and medium to high viscous, persistently sticky oil stains.
- 2a -20~448~
- Japanese Patent Publication No. 50463/1988 discloses a method of cleaning woven materials by using silicone containing compounds. According to the disclosure, a liquid cleaning composition containing an effective amount of cyclic siloxane having 4 to 6 silicon atoms is used. However, the liquid cleaning compositions including the above silicone containing compound are not suitable for use not only in general industrial products due to their being specifically prepared for woven materials, but also in systems using water (hereinafter referred to as "water system ) due to their being based on a single cyclic siloxane or the mixture of a cyclic siloxane and an organic solvent. Further, such compositions are not so dispersive in water that the addition of a surfactant thereto does not assist in blending them homogeneously, thereby causing phase separation immediately. Thus, they are not adapted for use as water system cleaning agents.
On the other hand, Japanese Patent Laid Open No. 56203/1978 recites an aerosol aqueous cleaning composition containing a chain polydimethylsiloxane having 2 to 3 silicon atoms in a single molucular. Since its content is limited to about 0.02 to 0.1 wt.%, no such advantage as improving the cleaning property of water system cleaning compositions is disclosed.
Under such circumstances, the development of high-performance water system cleaning agents free from environmental problems is strongly called for.
In the meantime, the use of lower alcohols such as isopropyl alcohol is under study for a new development that can replace the above-mentioned organic solvents for dewatering. However, 20344~3 isopropyl alcohol has a flash point of 11.7C, which is lower than room temperature, and this involves some danger of fires under ordinary handling conditions. In addition, isopropyl alcohol is highly compatible with water, so that the initial dewatering property is ensured, but its repetitive use causes dissolved water to be present again.
- As a result its dewatering property will be impaired on a long-term basis. To refine isopropyl alcohol for reuse by removing water from the water containing isopropyl alcohol, a tremendous equipment investment is required. That isopropyl alcohol is toxin to the human body is another factor that tends to keep it from using.
The use of hydrocarbon and higher alcohols which have higher flash points than room temperature allows a comparatively easy removal of water, but their low volatility prevents drying themselves at low temperatures, e.g., 60C or less, thereby making them unsuitable for applications to dewatering cleaning agents.
The invention provides water system cleaning compositions which have cleaning capability equivalent to that of organic solvent containing cleaning agents including such as freon* and which are stable as water system cleaning agents and free from environmental destruction and contamination.
*trademark .
- 2034~8 The invention also provides dewatering compositions which have the substituting and drying properties equivalent to those of organic solvent containing dewatering cleaning agents, which have few risks of fires and which are free from environmental destruction.
-4a-X`' ~t ~3~
A Su~nary of thc Invcntion ~
A cleaning agent composition of the invention comprises at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula:
R~ / R1 \ Rl Rl Si--O--Si--O Si Rl Rl \ Rl /1 Rl ... ... ... (I) (wherein Rl is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from O to 5), and cyclic polydiorganosiloxane represented by a general formula:
/ Rl si--o ~ Rl ,m ... ... ... (II) (wherein Rl is an organic group of single valence .substituted by the same of different group of unsubstituted, and m is an integer from 3 to 7).
Each of such low molecular weight polyorganosiloxanes exhibits powerful penetrability to stains and satisfactory substituting property with water alone, making itself a feature component of the invention. Reference character Rl in formulas (I) and (II) denotes a substituted or unsubstituted organic group of single valence including: a single-valence unsubstituted hydrocarbon group such as an alkyl group such as a methyl group, an ethyl group, a propyl group, and a butyl group and a phenyl group; and a single-valence substituted hydrocarbon group such 2034~8 as a trifluoromethyl group. As the R~ which is placed at an end of formula (I), an amino group, an amide group, an acrylic acid ester group, and a mercaptan group are typical organic groups;
however, the methyl group is most preferable from the viewpoint of stability, and maintainability of volatility, and the like.
The cleaning compositions of the invention may roughly be classified into two groups: a water system cleaning agent and a dewatering cleaning agent.
For use as a water system cleaning agent, suitable low molecular weight polyorganosiloxanes include:
octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and mixtures thereof, each having a cyclic structure; and octamethyltrisiloxane and decamethyltetrasiloxane, each having a straight chain structure, from the viewpoint of penetrability and cleaning capability. In regions where the water system cleaning composition has a strong alkaLine property from the viewpoint of stability of polysiloxane, the low molecular weight polyorganosiloxane having a straight chain structure which is represented by formula (I) is preferable.
For use as a dewatering cleaning agent, low molecular weight polyorganosiloxanes having a cyclic structure are preferable from the viewpoint of substituting property with water and penetrability and the like, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and mixtures thereof are more preferable.
A case in which the cleaning compositions of the invention are used as water system cleaning agents will now be described.
Although the low molecular weight polyorganosiloxanes 2~1344~8 represented by formulas (I) and (II) exhibit powerful penetrability to stains, each composition is not compatible with water singly nor is it soiuble and stably dispersive in water so that it is likely to have phase separation in water. That is, it is proposed to use them in combination with polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
~ R2 si--o (wherein R2 is an alkyl or phenyl group and A is a polyoxyalkylene group). As a result of such use in combination, the low molecular weight polyorganosiloxanes, providing stable dispersion in water, exhibit strong penetrability to stains. In addition, the use of a surfactant in combination with the compositions may improve their cleaning property.
Thus, preferable compositions for a water system cleaning agent of the invention contain the low molecular weight polyorganosiloxane represented by formula (I) or (II); the polyoxyalkylene group containing polyorganosiloxane having at least one siloxy unit represented by formula (III) in a single molecular; a surfactant; and water.
The polyoxyalkylene group containing polyorganosiloxane exhibits affinity for water owing to its polyoxyalkylene group bonded with the silicon atom, thus not only being a component for a stable water system dispersed solution or aqueous solution but also acting as an agent for eliminating stains by penetrating into the interface between the stains and a substrate which is 7 f 2~488 made of, e.g, a metal and which has the stains deposited thereon, and as an antifoaming agent as well.
Such a polyoxyalkylene group containing polyorganosiloxane can be prepared by hydrosilyl group containing polyorganosiloxane and a polyoxyalkylene compound having an unsaturated group at the end to interact with each other for addition under the presence of a platinum containing catalyzer.
An example of the polyoxyalkylene group denoted by reference character A in formula (III) is, e.g., a single-valence group represented by the formula:
- R3 (-o-R4 ) n oR5 ... ... ... (IV) (wherein R3 is a two-valance group selected from the group consisting of an alkylene group having from 1 to 8 carbon atoms, a ~ -hydroxypropyleneoxyalkylene group and a polymethylene oxyalkyelene group, both having from 4 to 11 carbon atoms; R4 is an alkylene group having from 2 to 4 carbon atoms; R5 is an end group selected from a hydrogen atom and a single-valence organic group; and n is a positive integer).
Siloxane that forms a main component of the polyoxyalkylene group containing polyorganosiloxane is not particularly limited.
The organic group that is to be bonded with the silicon atom of the siloxane is basically a methyl group, but may also contain a single-valence hydrocarbon group such as an ethyl group, a propyl group, a butyl group, a phenyl group, or a single-valence substituted hydrocarbon group such as a trifluoromethyl group as long as the advantages of the invention can remain harmless therefrom.
Also, the molecular weight of the siloxane is not particularly limited nor is that of a single polyoxyalkylene group. Although they are large values, the addition of a surfactant thereto and the like allows the composition to be made sufficiently water soluble or stably water dispersive. However, it is practically preferakle to limit the molecular weight of the single polyoxyalkylene group in the order of 100 to 5000. For a polyoxyalkylene chain, it is preferable to adjust its oxyethylene component to 40 mol % or more in the total polyoxyalkylene.
While the amount of the polyoxyalkylene group is not particularly limited, it is more preferable to limit it within 5 mol % or more of the total organic groups bonded with silicon atoms of the polyorganosiloxane from the standpoint of system stability.
Exemplary polyoxyalkylene group containing polyorganosiloxanes include:
a chain polysiloxane represented by the formula:
(CH3)3SiO- ( SiO-)p --(SiO ~)q - Si(CH3)3 ( CHz ) 3-O- ( CH2cH2o ) r ( CH2 CHO ) 3 - OCH3 (wherein p, q, r, and s are positive integers);` and a cyclic polysiloxane represented by the formula:
2~ 8 ( sio~ ( sio - )u (CH2)3--(CH2cH20)v H
(wherein t, u, and v are positive integers).
The surfactant serves as a component for dissolving, emulsifying, and stabilizing the stains removed by the low molecular weight polyorganosiloxanes or polyoxyalkylene group containing polyorganosiloxanes.
Such surfactants can be classified by the activation chemical structure into the following types: cationic, anionic, nonionic, amphoteric, and combined types. The invention may be applied to all the above types of surfactants. However, to obtain the advantage from their combination with the polyoxyalkylene group containing polyorganosiloxane, it is preferable to use anionic, nonionic, or amphoteric surfactants.
Particularly, the use of the polyoxyalkylene group containing polyorganosiloxane in combination with either anionic/nonionic surfactants or amphoteric/nonionic surfactants provides a remarkable synergetic effect in improving the cleaning property and penetrability of the low molecular weight polyorganosiloxanes or the polyoxyalkylene group containing polyorganosiloxanes.
Exemplary suitable surfactants to be applied to the invention include: anionic surfactants such as polyoxyalkylene alkylether sulfonates and phosphoric esters; nonionic surfactants such as polyalcohol fatty acid esters, polyoxyalkylene fatty acid esters, and polyoxyalkylene alkylethers; amphoteric surfactants f 203~L488 such as imidazolin derivatives; and cationic surfactants such as alkylamine salts, alkyl quaternary ammonium salts. In addition thereto, terpene containing compounds which are rarely present in the form of a single substance and extracted from natural substances as well as higher fatty acid esters may also be applied. It is also possible to use synthet~c compounds in which part of the chemical structure of each compound is substituted by a fluorine or silicon atom.
While the composition ratio of the above-mentioned quaternary water system cleaning agent is not particularly limited, it is preferable to blend 10 to 1000 parts by weight of a surfactant to 100 parts by weight of the polyoxyalkylene group containing polyorganosiloxane, and 1000 parts by weigh~ or less of the low molecular weight polyorganosiloxane to 100 parts by weight of a total combination of the above surfactant(s) and the polyoxyalkylene containing polyorganosiloxane. Too small an amount of the surfactant reduces the cleaning capability, while too large an amount impairs the penetratbility. Too large an amount of the low mo]ecular weight polyorganosiloxane not only makes the system difficult to disperse but also reduces stability as a water system composition. A preferable fraction of the surfactant is 30 to 700 parts by weight, or, more preferably, 50 to 300 parts by weight, to 100 parts by weight of the polyoxyalkylene group containing polyorganosiloxane. A more preferable fraction of the low molecular weight polyorganosiloxane is between 10 and 1000 part by weight. While the fraction of water in the quaternary water system cleaning agent is not particularly limited either, it is preferable to i 11 ' 203~488 have water 40 wt.~ or more or, more preferably, 7n to 99.5 wt.%
to the total composition from a stability viewpoint.
By the way, the polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by formula (III) penetrates, as described above, into the interface between the stains and the substrate made of, e.g., a metal to which the stains adhere to "peel off"
the stains. Thus, even a tertiary composition consisting of the polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water may serve as a viable water system cleaning agent. In this case, the fractions of the quaternary water system cleaning agent will apply to the tertiary composition.
The fractions of the tertiary or quaternary water system cleaning agents may be so designed that the value to be obtained by a canvas method at room temperature for evaluating penetrability will be 15 or less, 10 or less, or 5 or less. For the evaluation, the canvas method specified as a fiber/textile test method by Japanese Industrial Standards (JIS) is adopted.
Since the cleaning property of these water system cleaning agents depends on the pH value of the solution itself, it is desirable to adjust the pH value to the alkali region. The pH value is more preferably be between 8 to 14.
The tertiary or quaternary cleaning agents can be prepared easily by blending and stirring the above-mentioned polyoxyalkylene group containing polyorganosiloxane, a surfactant, water, or further the low molecular weight polyorganosiloxane represented by formula (I) or tII), where necessary. The use of a known dispersing device will help obtain 12 t 2G3~4~8 a water system cleaning agent with ease.
The water system cleaning agents such as described above may have additives to be applied to ordinary water-soluble cleaning agents such as pH modifiers, adsorbents, solid particles, synthetic builders, rust preventives, and antistatic agents mixed as cleaning assistants or post-cleaning added-value improving agents and the like, depending on the property, amount, adhering state, cleaning condition, and the like of a stain. Such an addition may play an important part depending on their application.
The water system cleaning agents of the invention may be applied to metals, ceramics, plastics, and the like. More specifically, they may be applied to metallic parts, surface treated parts, electronic and semiconductor parts, electric and precision machinery parts, optical parts, glass and ceramic parts, and the like. An exemplary general-purpose cleaning process usually involves cleaning of any of the above-described parts by such a process as ultrasonic process, mechanical stirring and spraying, and thereafter, washing by water (preferably by pure water or ion-exchanged water), and is dewatered by drying the part with heated air or a like process.
The cleaning composition in which the stain separated from the part is present is treated by, e.g., separating the stain through a filter or the like and thereafter by being subjected to a general waste water treatment process, thereby allowing the composition to be unhazardous and pollution-free easily.
According to the water system cleaning agent of the invention, the powerful penetrating property of the low molecular - - ` 203~4~8 weight polyorganosiloxane represen-ted by formula (I) or (II) for the interface between the stains and the substrate as well as the cleaning capability of the surfactant(s) to the stains provides a cleaning performance equivalent to that of the conventionally used freon* containing cleaning agents.
The use of the polyoxyalkylene group containing polyorganosiloxane in combination with the water system cleaning agents of the invention allows satisfactory dispersing property in water. In addition, when applied as a tertiary composition consisting of the polyoxyalkylene group containing polyorganosiloxane, the surfactant, and water, the cleaning agent of the invention exhibits excellent cleaning property by the penetrating capability of the polyoxyalkylene group containing polyorganosiloxane with respect to the stain. Being a water system agent, it will bring no risk of environmental destruction and pollution.
Thus, it can be said from the above that the water system cleaning agent of the invention can be an attractive replacement for cleaning agents based on organic solvents containing freon* and other substances which have considered hazardous.
A case in which a cleaning composition of the invention is used as a dewatering cleaning agent will now be described.
*trademark 20344~
Here, the term "dewatering agent" is only so named after "water," which is a typical liquid capable of being substituted by the low molecular weight polyorganosiloxanes, and the cleaning compositions of the invention may also be used as "liquid removing" agents in substituting and cleaning liquids other than water. The applicable liquids may be those which are insoluble -14a-`' X' ' , ~034488 or difficult to be dissolved in the low molecular weight polyorganosiloxanes and whose surface tensions are larger than those of the low molecular weight polyorganosiloxanes. The "water" to be cleaned may include liquids using water as a dispersion medium such as mixtures of water and alcohols and liquids in which various substances are dissolved.
The low molecular weight polyorganosiloxane represented by formula (I) or (II) can be, as described previously, substituted by water alone, thus allowing itself to be easily vaporized and dried by hot air below 60C. -Such a dewatering cleaning agent may consist substantially of the low molecular weight polyorganosiloxane and with it a satisfactory effect can be obtained. However, its cleaning and dewatering properties and the like will be further improved by forming it into a composition having the low molecular weight polyorganosiloxane mixed wit.h a surfactant and/or a hydrophilic solvent.
The above-mentioned surfactants contribute to improving particularly the cleaning and dewatering property, and suitable surfactants to be applied to the invention include: anionic surfactants such as polyoxyalkylene alkylether sulfonates and phosphoric esters; nonionic surfactants such as polyalcohol fatty acid esters, polyoxyalkylene fatty acid esters, and polyoxyalkylene alkylethers; amphoteric surfactants such as imidazolin derivatives; and cationic surfactants such as alkylamine salts, alkyl quaternary ammonium salts. In addition thereto, terpene containing compounds which are rarely present in the form of a single substance and extracted from natural 20344~8 substances as well as higher fatty acid esters may also be applied. It is also possible to use synthetic compounds in which part of the chemical structure of each compound is substituted by a fluorine or silicon atom. However, it is more preferable to use nonionic surfactants if the effect as a dewatering cleaning agent used in combination with the low molecular weight polyorganosiloxane is to be further improved.
While the composition ratio of the surfactant is not particularly limited, it is desirable to have 20 parts by weight or less, or, more preferably, 3 parts by weight or less, of the surfactant to 100 parts by weight of low molecular weight polyorganosiloxane.
A suitable hydrophilic solvent may be one compatible with the low molecular weight polyorganosiloxanes, and more particularly, one whose flash point is 40C or more from the practical viewpoint. The hydrophilic solvent contributes to improving substituting property by water.
Suitable hydrophilic solvents include: polyalcohols and their derivatives such as ethylene glycol monomethyl ethers, ethylene glycol monoethyl ethers, ethylene glycol monopropyl ethers, ethylene glycol monobutyl ethers, ethylene glycol monobutyl ether acetates, diethylene glycol monobutyl ethers.
Particularly preferable are diethylene glycol monobutyl ethers from the viewpoint of its compatibility with the low molecular weight polyorganosiloxanes and safety to the human body and the like. Since these compounds exhibit improved properties when coexisting with the low molecular weight polyorganosiloxanes, a composition only using this combination may allow substitution ~0344~38 by water and drying.
While the composition ratio of the hydrophilic solvent is not particularly limited, it is preferable to have 100 parts by weight or less or, more preferably, 50 parts by weight or less of the hydrophilic solvent mixed with 100 parts by weight of the low molecular weight polyorganosiloxane.
The dewatering cleaning agents of the invention may be applied to metals, ceramics, plastics, and the like. More specifically, they may be applied to metallic parts, surface treated parts, electronic and semiconductor parts, electric and precision machinery parts, optical parts, glass and ceramic parts, and the like. An exemplary general-purpose cleaning process usually involves immersing of any of the above-described parts or spraying a dewatering cleaning agent of the invention onto the part to substitute it by water and drying by blowing hot air and the like. The immersing and spraying processes may be accompanied by an ultrasonic process and mechanical stirring.
The dewatering cleaning agents of the invention, exhibiting a powerful dewatering property, can not only provide cleaning and water-substituting effects equivalent to those of conventional cleaning agents containing flon and the like but also allow various materials to be stably cleaned with their low eroding action. In addition, containing no element halogen such as chlorine and bromine in general, the dewatering cleaning agents of the invention have few risk of destroying or polluting the environment. Thus, it can be said that the dewatering cleaning agents of the invention will be a viable replacement for the conventional organic solvent containing dewatering cleaning - - 20344~
agents such as freon*, which have been imposing the environmental problems.
Fig. 1 is a diagram showing an exemplary construction of a cleaning system using a dewatering cleaning agent of the invention.
The invention will now be described with reference to examples in which a cleaning composition of the invention is applied to water system cleaning agents.
Example 1 Two kinds (A1 and A2) of polyoxyalkylene group containing polyorganosiloxane, each represented by formula (V) and (VI), were prepared.
*trademark '' X
.
20~44~8 Al:
(CH3)3SiO- ( SiO-)8-('iO -)50 - Si(CH3)3 (CH2)3-O-(cH2cH2O)6 fH3 - (CH2CHO)6 - OCH3 ... ... ... (V) A2:
(SiO-)l -(SiO -)3 (CH2)3-O-(cH2cH2o)lo - H ... ... ... (VI) Then, the polyo yalkylene denatured silicone (Al) represented by formula (V), polyoxyalkylene denatured silicone (A2) represented by formula (VI), sodium laurate (B1) and polyoxyethylene octylphenyl ether ( B2) (20 moles of polyoxyethylene), both serving as surfactants, and water were weighed so that their ratio by weight will be 5 : 5 : 4 : 4 : 82.
Thereafter, these components were charged into a homogenizing mixer for blending to obtain a water system cleaning composition P1.
Example 2 The polyoxyalkylene group containing polyorganosiloxane (Al), the sodium laurate (B1) and polyoxyethylene octylphenyl ether (B2), both serving as surfactants, and water were weighed ~034488 so that they satisfy the composition ratio specified in Table 1.
Then, a water system cleaning composition P2 was obtained as in Example 1.
Examples 3 to 5 The polyoxyalkylene group containing polyorganosiloxanes (Al) and (A2), dioctyl sodium sulfosuccinate (B3) that serves as a surfactant in addition to the surfactants (Bl) and (B2), octamethyl tetrasiloxane (D1) and octamethyl trisiloxane (D2), both as low molecular weight polyorganosiloxanes, and water were selectively mixed to prepare water system cleaning compositions P3 to P5 having composition ratios specified in Table 1 in the same manner as that in Example 1.
Comparative examples 1 to 3 Three kinds of water system cleaning compositions were prepared in a manner similar to that of each of the above examples except that no polyoxyalkylene group containing polyorganosiloxane was mixed.
The properties as a cleaning agent were evaluated as to the water system cleaning compositions of Examples 1 to 5 and Comparative examples 1 to 3 by the following methods. The result is also shown in Table 1.
(1) Penetration test Measurements were made based on the JIS-specified canvas method. The smaller value means better penetrating property;
i.e., the composition is more effective in cleaning smaller parts.
(2) Cleaning property test A sample is prepared by applying a spindle oil over a steel strip and baking it at 135C for 48 hours. The property is evaluated by the time spent for cleaning the oil baked on the sample (by ultrasonic cleaning). The smaller the value is, the better the cleaning property becomes.
(3) Stability test Each composition was contained in a transparent bottle of 200 ml sealed thereafter and then heated at 50C for 6 hours.
After being graduall~ cooled from 50 to 25C, its appearance in the bottle is observed.
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As is apparent from the result shown in Table 1, the water system cleaning agent of the invention exhibits excellent cleaning capability and penetrability, attesting to its availability as a replacement for the conventional solvent based A fre~
1-~ cleaning agents containing flon and the like. With its stability, it is considered a highly practical product. In contradistinction thereto, the water system cleaning agents according to Comparative examples were satisfactory neither in cleaning capability nor in penetrability.
An exemplary process employed to clean a specific part using a water system cleaning agent of the invention will now be described.
Example 6 In fabricating a liquid crystal device, a liquid crystal cell is evacuated to a high vacuum degree and a liquid crystal material is sealed in a device. In this case, the evacuation is carried out by a high performance diffusion vacuum pump. Since the diffused oil enters into the vacuum system in the form of mist, the pump must be cleaned often to remove the oil.
In this example, the water system c]eaning agent of the invention was used in lieu of a conventional triethane cleaning agent.
A pump part made of a stainless steel SUS304 and a Ni-plated stainless steel SUS304 material having an adhesion of Silicon Oil F-4 (trademark of Shinetsu Chemical) as a diffusion oil was cleaned.
The composition ratio of the used water system cleaning agent is as shown below.
e ~7h 23 2~4488 That is, in 80 wt.% of ion-exchanged water being sufficiently stirred at ambient temperature, 6 wt.% of the polyoxyalkylene group containing polyorganosiloxane having the following chemical structure was gradually added to obtain an achxomatic translucent homogenous solution.
(~iO ) (SiO -)6 (CH2)3-O-(cE~2cH2O) 15 - H
On the other hand, as a surfactant, a mixture of 8 wt.% of special nonionic Adecanol B-4001 (trademark of Asahi Electrochemical) and 6 wt.% of anionic TWA-2023 (trademark of Ipposha Oil and Grease) of sulfuric acid ester PURLONIC structure was added to the above water/siloxane solution.
After diluting the water system cleaning agent thus obtained was diluted by ion-exchanged water at an arbitrary ratio, Silicone Oil F-4 was cleaned using the diluted cleaning agents.
As a result, the pump part was satisfactorily cleaned: through immersion by stirring for 1 minute in a 1/10 diluted cleaning agent at ambient temperature; through immersion by oscillating for 1 minute in a 1/30 diluted cleaning agent at 40C or through 1 minute ultrasonic cleaning at 20C in the same cleaning agent;
and through 1 minute ultrasonic cleaning in a 1/50 diluted cleaning agent at 50C, respectively.
For comparison, the pump part was similarly cleaned with compositions containing only surfactant(s) and no polyoxyalkylene group containing polyorganosiloxane. Silicone Oil was not removed sufficiently with 10 or more minute immersion ultrasonic cleaning in a 1/10 diluted composition at ambient temperature.
To remove Silicone Oil with this composition, it took more than 5 minutes at 65C or more.
It is understood from this data that the cleaning agent that incorporates the polyoxyalkylene group containing polyorganosiloxane of the invention exhibits an outstanding cleaning property.
Example 7 The polyoxyalkylene groupcontaining polyorganosiloxanes and the low molecular weight polyorganosiloxanes of the invention contribute to significantly improve the cleaning capability of commercially available water-soluble cleaning agents.
An aqueous solution of Chemiclean MS-109 (trademark of Sanyo Kasei Kogyo), which is a surfactant containing, low foaming, rust preventive cleaning agent, is typically used to clean mechanical and metallic parts. Blending 3 wt.% of the polyoxyalkylene denatured silicon (A1) represented by formula (V) in Example 1, 5 wt.% of cyclic hexamethylcyclotrisiloxane, 17 wt.% of ion-exchanged water with 65 wt.% of the above aqueous solution, a new cleaning composition was prepared.
This new cleaning composition was 1/20 diluted by ion-exchanged water and its cleaning property was evaluated by the following method. The result is shown in Table 2. For comparison, the evaluation result of 1/20 diluted Chemiclean MS-109 was also shown.
Test Method (1) Cleaning test - 1 The following contaminants were applied to a degreased aluminum plate (AC-~A) by immersing, dried by blowing, and immersed whi].e stirred (400 rpm) in respective cleaning agents (1/20 diluted) for 15 seconds to 1 minute. Then, after immersed in water, the aluminum plate was dried by blowing. Each contaminant was transferred on white paper through an adhesive tape for reflectance measurement by a colorimeter thereby to calculate the cleaning rate.
Contaminant:
Spindle oil 78%
Fatty acid ester 15%
Ch~.orinated paraffin5%
Carbon black 2%
Cleaning rate (%) = Rw - Rs / Ro - Rs Ro: Reflectance of the original white paper Rs: Reflectance of the standard contaminated plate Rw: Reflectance of the contaminated plate after cleaned (Z) Cleaning test - 2 A contaminant was prepared by adding 2% of carbon black to a water-soluble machining oil (emulsive), and the test was performed in a manner similar to that of Cleaning test - 1. Its cleaning rate was similarly calculated.
Table 2 2034488 Immersion time Cleaning rate (%) (second) Invention MS-109 72.4 59.0 Cleaning test - 1 30 86.5 65.2 100.0 67.8 Cleaning test - 2 15 81.7 58.0 g3.8 71.0 203~88 Similar tests were conducted on EP-680 (trademark of E.P.
Japan) which is a commercially available supereffective cleaning solution and water system cleaning agent; Banrise D-20 (trademark of Joban Chemical Industries) which is an emulsive degreased cleaning agent; and Hikari ~ce (trademark of Shoko Trade) which is a powerful special cleaning agent. As a result, these cleaning agents, when used in combination of the polyoxyalkylene group containing polyorganosiloxane and the low molecular weight polyorganosiloxane of the invention, exhibited a significantly improved cleaning property.
Example 8 The water system cleaning agent of the invention exhibits remarkable effect on cleaning of fluxes used in mounting electronic parts on printed boards. The flux comes roughly in two types: rosin containing and water-soluble. A specific example of cleaning rosin containing fluxes, which is said to be a difficult task, will now be described.
As a step prior to soldering a part on a printed board, a WW rosin ester was put on a part and immersed in a solder bath at 230 to 250C and then the part was mounted. It was observed that the flux was completely removed when the printed board was shower-rinsed for 35C for 45 seconds using a water system cleaning agent described below.
The water system cleaning composition used here is prepared by blending 2 wt.% of the polyoxyalkylene group containing polyorganosiloxane represented by formula (VII), 3 wt.% of Senkanol FM (trademark of Nippon Senka), which is an amphoteric surfactant, 5 wt.% of Nikkol CMT-30 (trademark of Nippon 20344s8 Surfactant), which is a sodium-N-COCOIL methyl taurine containing nonionic surfactant, and adding ion-exchanged water to prepare 100 wt.% of the composition.
~ ICH3 (C~3)3SiO- ('~i~)s - (SiO -)35 - Si(CH3)3 ~ CH
- (CH2)3-O-(CH2CH20)6 ~
L (CH2CHO)4 - OCH3 ... ... ... (VII) When acceleration aging tests which guarantees US MIL-F-14256C stan~ard, surface insulation resistance tests, ion residual tests and the like were conducted on the above composition which was 1/10 diluted by ion-exchanged water, the results were satisfactory.
Examples in which cleaning compositions of the invention were applied to dewatering cleaning agents will now be described.
Examples 9 to 17 Octamethyltrisiloxane (El), octamethyltetrasiloxane (E2), and decamethylpentasiloxane (E3) were prepared as low molecular weight polyorganosiloxanes; polyoxyethylene oleyl ether (Fl) (P.O.E =6 moles), and polyoxyethylene octylphenyl ether (F2) (P.O.E = 10 moles) as surfactants; and diethylene glycol monobutyl ether (G1) as a hydrophilic solvent were prepared.
These components were selected and blended so that the composition ratio shown in Table 3 were satisfied to obtain respective dewatering cleaning agents.
Comparative examples 4 to 8 203~488 Flon 113, methylene chloride, isopropyl alcohol, and ethanol were prepared as conventional dewatering cleaning agents to obtain 5 types of dewatering cleaning agents whose composition ratios were as shown in Table 3.
The properties of Examples 9 to 17 and Comparative examples 4 to 8 were evaluated by the following methods. The result is also shown in Table 3.
(1) Dewatering property Various pieces (a stainless steel strip, a ceramic piece, a polycarbonate piece, a Ni-plated steel strip) were immersed in each dewatering cleaning agent after washed by water. In examples 13 to 15, each piece was then rinsed by the low molecular weight polyorganosiloxane blended to prepare each dewatering cleaning agent. Thereafter, each piece was dried in an oven at 50C. The water marks (a stain by impurities dissolved in water) after drying each piece was observed visibly and by a scanning electron microscope and evaluated in accordance with the following criteria.
XX: Not evaluable due to erosion of the piece during dewatering.
X: Water marks were visibly observed.
o: No water marks were visibly observed.
~: No water marks whose size is 50 ~m or more were observed by the scanning electron microscope.
(2) Continuous dewatering property A continuous dewatering test with a frequency of 50 times were conducted on a stainless steel strip and the appearance of the strip was evaluated in a manner similar to that of item (1).
20~4~88 (3) Drying property The stai.nless steel strip was immersed in each dewatering cleaning agent and dried in the oven at 50C. During the drying process, the strip was touched by a finger to see the drying condition every 5 minutes and the time required for drying was recorded on a 5-minute basis.
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2034~88 As is apparent from the result shown in Table 3, the dewatering cleaning agents of the invention, exhibiting satisfactory dewatering property, can be a viable substitute for organic solvent containing flon and the like based cleaning agents.
Dewatering cleaning agents containing methylene chloride or isopropyl alcohol (Comparative examples 4 and 5) rust and erode metal films and plastics. In contradistinction thereto, the dewatering c]e ning agents of the invention are stable to metal films and plastics and exhibit satisfactory dewatering property even to ceramics wh;ch have large surface roughness values, thereby ensuring their reliability when applied to parts including metal, plated, electronic, semiconductor, plastic, and ceramic parts. The dewatering cleaning agent containing isopropyl alcohol permitted water to be dissolved therein, thereby causing water to present on the part again.
Moreover, it is understood that mixing of surfactants and hydrophilic solvents with the dewatering cleaning agents of the invention improved the dewatering property, thereby attesting to their industrial applicability.
An exemplary cleaning system using a dewatering cleaning agent of the invention will now be described with reference to Fig. 1.
A cleaning system shown in Fig. 1 consists roughly of a cleaning/water-substituting process A and a rinsing/dewatering process B.
The cleaning/water-substituting process A, which is the f.irst process involves a first cleaning vessel 1 and a second 203~8 cleaning vessel 2, each serving both as a separator through sedimentation and a separator through overfLow, and a dewatering vessel 3. The first and second cleaning vessels 1 and 2 communi.cate with each other through a drain line 2a and an overflow line 2b. The first and second cleaning vessels 1 and 2 are operated together with ultrasonic, oscillating, mechanical stirring, cleaning agent heating, and brushing processes and the like, if necessary.
The first and second cleaning vessels 1 and 2 respectively contain a cleaning agent D1 composed of a low molecular weight polyorganosiloxane and a surfactant, which is one of the dewatering cleaning agents of the invention. The surfactant containing cleaning agent Dl may be so prepared that its specific gravity is smaller than that of water and larger than that of an oily stain. Therefore, water Y introduced by an object to be cleaned X is separated by being sedimentated at the bottom of the surfactant containing cleaning agent D1 that has been charged in the first and second cleaning vessels 1 and 2. If an oily stain Z is present on the object X, the oily stain Z is separated by floating upward in the surfactant containing cleaning agent Dl in the first and second cleaning vessels 1 and 2.
The water Y separated by being sedimentated in the second cleaning vessel 2 is intermittently discharged to the first cleaning vessel 1 through a drain line 2a wh;le the water Y
separated by being sedimentated in the first cleaning vessel 1 is intermittently discharged to a cleaning agent recycling mechanism C (described later) through a drain line 4. A drain line 3a connected to the drainage vessel 3 is also connected to 2~)34488 the cleaning agent recycling mechanism C.
The oily stain Z separated by floating in the first and second vessels 1 and 2 is di.scharged outside while continuously overflown through an overflow line 5 connected to the first cleaning vessel 1.
The surfactant containing cleaning agent Dl charged in the first and second cleaning vessels 1 and 2 is continuously circul~ted through a filter 6 that ser~res to remove solid particles, H20 particles, undissolved substances, and the like contained in the cleaning agent Dl.
The rinsing/dewatering process B, which is the second process, involves a third cleaning vessel 7 and a shower rinse vessel 8. Below the shower rinse vessel 8 is a buffer tank 9 that communicates with the third cleaning vessel 7 through a drain line 9a and an overflow line 9b. The third cleaning vessel 7 is also operated together with ultrasonic, oscillating, mechanical stirring, cleaning agent heating, and brushing processes and the like, if necessary.
The third cleaning vessel 7 contains a cleaning agent D2 consisting only of a silicone composition identical to the low molecular weight polyorganosiloxane used in the first process A.
The cleaning agent D2 may be so prepared that its s`pecific gravity is smaller than that of water and larger than that of an oily stain. Therefore, as in the first process A, water Y is separated by being sedimentated at the bottom of the cleaning agent D2 and the oily stain Z is separated by floating upward in the cleaning agent D2.
The water Y separated by being sedimentated in the third 20~4488 cleaning vessel 7 is intermittently discharged to the cleaning agent recycling mechanism C through a drain line 10 while the oily stain Z separated by floating in the third cleaning vessel 7 is discharged outside through an overflow line 11.
Thc cleaning agent D2 charged in the third cleaning vessel 7 is continuously circulated through a filter 12 that serves to remove solid particles, H20 particles, undissolved substances, and the like contained in the cleaning agent D2.
The object to be cleaned X undergoes the first process A and then the second process B, cleaned and dewatered, and then dried by a fan forced drier (not shown) to complete the cleaning process.
The cleaning agent used in the cleaning system is subjected to the following recycling process.
As described above, the drain lines 4, 3a, 10 of the first, second, and third cleani.ng vessels 1, 2, and 7, and the dewatering vessel 3 are connected to the cleaning agent recycling mechanism C. The cleaning agent D1 or D2 contained in each cleaning vessel is constantly cleaned by the filters 6 and 12.
However, when heavily contaminated, the cleaning agent is introduced to the cleaning agent recycling mechanism C through drain lines 4 and 10 by a conveyer pump 13 for fractional distillation. The cleaning agent Dl deposited in the dewatering vessel 3 is also supplied intermittently to the cleaning agent recycling mechanism C.
At the cleaning agent recycling mechanism C, the introduced cleaning agent is separated into liquid components and solid components ~y a filter 14, and only the liquid components are ~034~88 forwarded to a distiller 15 with the solid components being destroyed. The distiller 15 separates various components, water, oily stains in the cleaning agent utilizing the difference in their boiling points. Water and the like that remain in the distiller 15 are further separated by a decanter 16.
Since the cleaning agent D1 is an agent having a surfactant added to the cleaning agent D2 that contains only the low molecular weight polyorganosiloxane, the low molecular weight polyorganosiloxane, i.e., the cleaning agent D2, can be extracted from both cleaning agents Dl and D2, thereby allowing the cleaning agent D2 to be recycled. The components other than the recycled cleaning agent ~2, i.e., the surfactant, water, and the like will be destroyed.
The recycled cleaning agent D2 iS forwarded to a mixer 18 from which the cleaning agent Dl iS supplied to the shower rinse vessel 8, the third cleaning vessel 7, or the second cleaning vessel 2 through a line 17.
In the shower rinse vessel 8, a shower rinsing process is conducted using only the recycled cleaning agent D2 or a cleaning agent D2 newly introduced through a cleaning agent supply line 19, both being free from impurities.
The mixer 18 mixes the recycled or new cleaning agent D2 with the surfactant newly supplied from a surfactant supply line 20 to prepare a new cleaning agent Dl. The new cleaning agent Dl is supplied to the second cleaning vessel 2, if necessary.
With the cleaning system of such construction as described above, the dewatering cleaning agents of the invention can be used efficiently and effectively enjoying the advantage of 203448~
- excellent cleaning properties.
Industrial Applicability As described in the foregoing pages, the cleaning compositions of the invention, when used as water system cleaning agents, exhibit a cleaning effect equivalent to that of .~ -f~e~
conventional flon containing cleaning agents and an excellent stability as a water system with no risk of enviromental destruction and pollution, thereby making a viable replacement ~ r~
for the organic solvent based cleaning agents including-flon and the like which have environmental disadvantages. In addition, the cleaning compositions of the invention, when used as dewatering cleaning agents, provide a powerful dewatering property with no risk of environmental destruction and pollution, thereby serving a viable replacement for the organic solvent based dewatering cleaning agents including flon and the like which have environmental disadvantages.
~aJ~ ~k
and ~4) Increase in space for installing a cleaning system including a cooler and a heat shielding unit.
*trademark X
.
20344~
The term "dewatering cleaning agent" is used herein to denote a cleaning agent into which an object to be cleaned, which has been washed with water, is immersed or with which the object is rinsed by shower thereby to have water present on the object substituted by itself and then vaporized by air at room temperature or heated to 60C or less so that the object can be dried.
However, ever since it has been found that the destruction of the ozone layer by discharge of freon*
affects seriously the human body and the ecological system, the use of freons* such as freon* 12 and freon* 113 whose ozone destruction coefficients are high is on the gradual decline on a global scale for an eventual total ban.
Stricter regulations are imposed also on chlorine containing organic solvents such as trichloroethylene and tetrachloroethylene which are presumed to induce soil and underwater contaminations and the like.
Freons* whose ozone destruction coefficients are lower than the currently used freon containing solvents are being developed, some of which are under fabrication on a commercial basis. However, these new developments are not so welcome because they still are destroyers of the ozone layer.
*trademark - 20344~
What gradually attracts attention as a replacement for the above organic solvents is a surfactant-based water system cleaning agent which is free from environmental destruction and contamination. However, cleaning agents containing only surfactants are not satisfactory in penetrability, thereby not cleaning, e.g., stains penetrated into narrow portions and medium to high viscous, persistently sticky oil stains.
- 2a -20~448~
- Japanese Patent Publication No. 50463/1988 discloses a method of cleaning woven materials by using silicone containing compounds. According to the disclosure, a liquid cleaning composition containing an effective amount of cyclic siloxane having 4 to 6 silicon atoms is used. However, the liquid cleaning compositions including the above silicone containing compound are not suitable for use not only in general industrial products due to their being specifically prepared for woven materials, but also in systems using water (hereinafter referred to as "water system ) due to their being based on a single cyclic siloxane or the mixture of a cyclic siloxane and an organic solvent. Further, such compositions are not so dispersive in water that the addition of a surfactant thereto does not assist in blending them homogeneously, thereby causing phase separation immediately. Thus, they are not adapted for use as water system cleaning agents.
On the other hand, Japanese Patent Laid Open No. 56203/1978 recites an aerosol aqueous cleaning composition containing a chain polydimethylsiloxane having 2 to 3 silicon atoms in a single molucular. Since its content is limited to about 0.02 to 0.1 wt.%, no such advantage as improving the cleaning property of water system cleaning compositions is disclosed.
Under such circumstances, the development of high-performance water system cleaning agents free from environmental problems is strongly called for.
In the meantime, the use of lower alcohols such as isopropyl alcohol is under study for a new development that can replace the above-mentioned organic solvents for dewatering. However, 20344~3 isopropyl alcohol has a flash point of 11.7C, which is lower than room temperature, and this involves some danger of fires under ordinary handling conditions. In addition, isopropyl alcohol is highly compatible with water, so that the initial dewatering property is ensured, but its repetitive use causes dissolved water to be present again.
- As a result its dewatering property will be impaired on a long-term basis. To refine isopropyl alcohol for reuse by removing water from the water containing isopropyl alcohol, a tremendous equipment investment is required. That isopropyl alcohol is toxin to the human body is another factor that tends to keep it from using.
The use of hydrocarbon and higher alcohols which have higher flash points than room temperature allows a comparatively easy removal of water, but their low volatility prevents drying themselves at low temperatures, e.g., 60C or less, thereby making them unsuitable for applications to dewatering cleaning agents.
The invention provides water system cleaning compositions which have cleaning capability equivalent to that of organic solvent containing cleaning agents including such as freon* and which are stable as water system cleaning agents and free from environmental destruction and contamination.
*trademark .
- 2034~8 The invention also provides dewatering compositions which have the substituting and drying properties equivalent to those of organic solvent containing dewatering cleaning agents, which have few risks of fires and which are free from environmental destruction.
-4a-X`' ~t ~3~
A Su~nary of thc Invcntion ~
A cleaning agent composition of the invention comprises at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula:
R~ / R1 \ Rl Rl Si--O--Si--O Si Rl Rl \ Rl /1 Rl ... ... ... (I) (wherein Rl is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from O to 5), and cyclic polydiorganosiloxane represented by a general formula:
/ Rl si--o ~ Rl ,m ... ... ... (II) (wherein Rl is an organic group of single valence .substituted by the same of different group of unsubstituted, and m is an integer from 3 to 7).
Each of such low molecular weight polyorganosiloxanes exhibits powerful penetrability to stains and satisfactory substituting property with water alone, making itself a feature component of the invention. Reference character Rl in formulas (I) and (II) denotes a substituted or unsubstituted organic group of single valence including: a single-valence unsubstituted hydrocarbon group such as an alkyl group such as a methyl group, an ethyl group, a propyl group, and a butyl group and a phenyl group; and a single-valence substituted hydrocarbon group such 2034~8 as a trifluoromethyl group. As the R~ which is placed at an end of formula (I), an amino group, an amide group, an acrylic acid ester group, and a mercaptan group are typical organic groups;
however, the methyl group is most preferable from the viewpoint of stability, and maintainability of volatility, and the like.
The cleaning compositions of the invention may roughly be classified into two groups: a water system cleaning agent and a dewatering cleaning agent.
For use as a water system cleaning agent, suitable low molecular weight polyorganosiloxanes include:
octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and mixtures thereof, each having a cyclic structure; and octamethyltrisiloxane and decamethyltetrasiloxane, each having a straight chain structure, from the viewpoint of penetrability and cleaning capability. In regions where the water system cleaning composition has a strong alkaLine property from the viewpoint of stability of polysiloxane, the low molecular weight polyorganosiloxane having a straight chain structure which is represented by formula (I) is preferable.
For use as a dewatering cleaning agent, low molecular weight polyorganosiloxanes having a cyclic structure are preferable from the viewpoint of substituting property with water and penetrability and the like, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and mixtures thereof are more preferable.
A case in which the cleaning compositions of the invention are used as water system cleaning agents will now be described.
Although the low molecular weight polyorganosiloxanes 2~1344~8 represented by formulas (I) and (II) exhibit powerful penetrability to stains, each composition is not compatible with water singly nor is it soiuble and stably dispersive in water so that it is likely to have phase separation in water. That is, it is proposed to use them in combination with polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
~ R2 si--o (wherein R2 is an alkyl or phenyl group and A is a polyoxyalkylene group). As a result of such use in combination, the low molecular weight polyorganosiloxanes, providing stable dispersion in water, exhibit strong penetrability to stains. In addition, the use of a surfactant in combination with the compositions may improve their cleaning property.
Thus, preferable compositions for a water system cleaning agent of the invention contain the low molecular weight polyorganosiloxane represented by formula (I) or (II); the polyoxyalkylene group containing polyorganosiloxane having at least one siloxy unit represented by formula (III) in a single molecular; a surfactant; and water.
The polyoxyalkylene group containing polyorganosiloxane exhibits affinity for water owing to its polyoxyalkylene group bonded with the silicon atom, thus not only being a component for a stable water system dispersed solution or aqueous solution but also acting as an agent for eliminating stains by penetrating into the interface between the stains and a substrate which is 7 f 2~488 made of, e.g, a metal and which has the stains deposited thereon, and as an antifoaming agent as well.
Such a polyoxyalkylene group containing polyorganosiloxane can be prepared by hydrosilyl group containing polyorganosiloxane and a polyoxyalkylene compound having an unsaturated group at the end to interact with each other for addition under the presence of a platinum containing catalyzer.
An example of the polyoxyalkylene group denoted by reference character A in formula (III) is, e.g., a single-valence group represented by the formula:
- R3 (-o-R4 ) n oR5 ... ... ... (IV) (wherein R3 is a two-valance group selected from the group consisting of an alkylene group having from 1 to 8 carbon atoms, a ~ -hydroxypropyleneoxyalkylene group and a polymethylene oxyalkyelene group, both having from 4 to 11 carbon atoms; R4 is an alkylene group having from 2 to 4 carbon atoms; R5 is an end group selected from a hydrogen atom and a single-valence organic group; and n is a positive integer).
Siloxane that forms a main component of the polyoxyalkylene group containing polyorganosiloxane is not particularly limited.
The organic group that is to be bonded with the silicon atom of the siloxane is basically a methyl group, but may also contain a single-valence hydrocarbon group such as an ethyl group, a propyl group, a butyl group, a phenyl group, or a single-valence substituted hydrocarbon group such as a trifluoromethyl group as long as the advantages of the invention can remain harmless therefrom.
Also, the molecular weight of the siloxane is not particularly limited nor is that of a single polyoxyalkylene group. Although they are large values, the addition of a surfactant thereto and the like allows the composition to be made sufficiently water soluble or stably water dispersive. However, it is practically preferakle to limit the molecular weight of the single polyoxyalkylene group in the order of 100 to 5000. For a polyoxyalkylene chain, it is preferable to adjust its oxyethylene component to 40 mol % or more in the total polyoxyalkylene.
While the amount of the polyoxyalkylene group is not particularly limited, it is more preferable to limit it within 5 mol % or more of the total organic groups bonded with silicon atoms of the polyorganosiloxane from the standpoint of system stability.
Exemplary polyoxyalkylene group containing polyorganosiloxanes include:
a chain polysiloxane represented by the formula:
(CH3)3SiO- ( SiO-)p --(SiO ~)q - Si(CH3)3 ( CHz ) 3-O- ( CH2cH2o ) r ( CH2 CHO ) 3 - OCH3 (wherein p, q, r, and s are positive integers);` and a cyclic polysiloxane represented by the formula:
2~ 8 ( sio~ ( sio - )u (CH2)3--(CH2cH20)v H
(wherein t, u, and v are positive integers).
The surfactant serves as a component for dissolving, emulsifying, and stabilizing the stains removed by the low molecular weight polyorganosiloxanes or polyoxyalkylene group containing polyorganosiloxanes.
Such surfactants can be classified by the activation chemical structure into the following types: cationic, anionic, nonionic, amphoteric, and combined types. The invention may be applied to all the above types of surfactants. However, to obtain the advantage from their combination with the polyoxyalkylene group containing polyorganosiloxane, it is preferable to use anionic, nonionic, or amphoteric surfactants.
Particularly, the use of the polyoxyalkylene group containing polyorganosiloxane in combination with either anionic/nonionic surfactants or amphoteric/nonionic surfactants provides a remarkable synergetic effect in improving the cleaning property and penetrability of the low molecular weight polyorganosiloxanes or the polyoxyalkylene group containing polyorganosiloxanes.
Exemplary suitable surfactants to be applied to the invention include: anionic surfactants such as polyoxyalkylene alkylether sulfonates and phosphoric esters; nonionic surfactants such as polyalcohol fatty acid esters, polyoxyalkylene fatty acid esters, and polyoxyalkylene alkylethers; amphoteric surfactants f 203~L488 such as imidazolin derivatives; and cationic surfactants such as alkylamine salts, alkyl quaternary ammonium salts. In addition thereto, terpene containing compounds which are rarely present in the form of a single substance and extracted from natural substances as well as higher fatty acid esters may also be applied. It is also possible to use synthet~c compounds in which part of the chemical structure of each compound is substituted by a fluorine or silicon atom.
While the composition ratio of the above-mentioned quaternary water system cleaning agent is not particularly limited, it is preferable to blend 10 to 1000 parts by weight of a surfactant to 100 parts by weight of the polyoxyalkylene group containing polyorganosiloxane, and 1000 parts by weigh~ or less of the low molecular weight polyorganosiloxane to 100 parts by weight of a total combination of the above surfactant(s) and the polyoxyalkylene containing polyorganosiloxane. Too small an amount of the surfactant reduces the cleaning capability, while too large an amount impairs the penetratbility. Too large an amount of the low mo]ecular weight polyorganosiloxane not only makes the system difficult to disperse but also reduces stability as a water system composition. A preferable fraction of the surfactant is 30 to 700 parts by weight, or, more preferably, 50 to 300 parts by weight, to 100 parts by weight of the polyoxyalkylene group containing polyorganosiloxane. A more preferable fraction of the low molecular weight polyorganosiloxane is between 10 and 1000 part by weight. While the fraction of water in the quaternary water system cleaning agent is not particularly limited either, it is preferable to i 11 ' 203~488 have water 40 wt.~ or more or, more preferably, 7n to 99.5 wt.%
to the total composition from a stability viewpoint.
By the way, the polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by formula (III) penetrates, as described above, into the interface between the stains and the substrate made of, e.g., a metal to which the stains adhere to "peel off"
the stains. Thus, even a tertiary composition consisting of the polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water may serve as a viable water system cleaning agent. In this case, the fractions of the quaternary water system cleaning agent will apply to the tertiary composition.
The fractions of the tertiary or quaternary water system cleaning agents may be so designed that the value to be obtained by a canvas method at room temperature for evaluating penetrability will be 15 or less, 10 or less, or 5 or less. For the evaluation, the canvas method specified as a fiber/textile test method by Japanese Industrial Standards (JIS) is adopted.
Since the cleaning property of these water system cleaning agents depends on the pH value of the solution itself, it is desirable to adjust the pH value to the alkali region. The pH value is more preferably be between 8 to 14.
The tertiary or quaternary cleaning agents can be prepared easily by blending and stirring the above-mentioned polyoxyalkylene group containing polyorganosiloxane, a surfactant, water, or further the low molecular weight polyorganosiloxane represented by formula (I) or tII), where necessary. The use of a known dispersing device will help obtain 12 t 2G3~4~8 a water system cleaning agent with ease.
The water system cleaning agents such as described above may have additives to be applied to ordinary water-soluble cleaning agents such as pH modifiers, adsorbents, solid particles, synthetic builders, rust preventives, and antistatic agents mixed as cleaning assistants or post-cleaning added-value improving agents and the like, depending on the property, amount, adhering state, cleaning condition, and the like of a stain. Such an addition may play an important part depending on their application.
The water system cleaning agents of the invention may be applied to metals, ceramics, plastics, and the like. More specifically, they may be applied to metallic parts, surface treated parts, electronic and semiconductor parts, electric and precision machinery parts, optical parts, glass and ceramic parts, and the like. An exemplary general-purpose cleaning process usually involves cleaning of any of the above-described parts by such a process as ultrasonic process, mechanical stirring and spraying, and thereafter, washing by water (preferably by pure water or ion-exchanged water), and is dewatered by drying the part with heated air or a like process.
The cleaning composition in which the stain separated from the part is present is treated by, e.g., separating the stain through a filter or the like and thereafter by being subjected to a general waste water treatment process, thereby allowing the composition to be unhazardous and pollution-free easily.
According to the water system cleaning agent of the invention, the powerful penetrating property of the low molecular - - ` 203~4~8 weight polyorganosiloxane represen-ted by formula (I) or (II) for the interface between the stains and the substrate as well as the cleaning capability of the surfactant(s) to the stains provides a cleaning performance equivalent to that of the conventionally used freon* containing cleaning agents.
The use of the polyoxyalkylene group containing polyorganosiloxane in combination with the water system cleaning agents of the invention allows satisfactory dispersing property in water. In addition, when applied as a tertiary composition consisting of the polyoxyalkylene group containing polyorganosiloxane, the surfactant, and water, the cleaning agent of the invention exhibits excellent cleaning property by the penetrating capability of the polyoxyalkylene group containing polyorganosiloxane with respect to the stain. Being a water system agent, it will bring no risk of environmental destruction and pollution.
Thus, it can be said from the above that the water system cleaning agent of the invention can be an attractive replacement for cleaning agents based on organic solvents containing freon* and other substances which have considered hazardous.
A case in which a cleaning composition of the invention is used as a dewatering cleaning agent will now be described.
*trademark 20344~
Here, the term "dewatering agent" is only so named after "water," which is a typical liquid capable of being substituted by the low molecular weight polyorganosiloxanes, and the cleaning compositions of the invention may also be used as "liquid removing" agents in substituting and cleaning liquids other than water. The applicable liquids may be those which are insoluble -14a-`' X' ' , ~034488 or difficult to be dissolved in the low molecular weight polyorganosiloxanes and whose surface tensions are larger than those of the low molecular weight polyorganosiloxanes. The "water" to be cleaned may include liquids using water as a dispersion medium such as mixtures of water and alcohols and liquids in which various substances are dissolved.
The low molecular weight polyorganosiloxane represented by formula (I) or (II) can be, as described previously, substituted by water alone, thus allowing itself to be easily vaporized and dried by hot air below 60C. -Such a dewatering cleaning agent may consist substantially of the low molecular weight polyorganosiloxane and with it a satisfactory effect can be obtained. However, its cleaning and dewatering properties and the like will be further improved by forming it into a composition having the low molecular weight polyorganosiloxane mixed wit.h a surfactant and/or a hydrophilic solvent.
The above-mentioned surfactants contribute to improving particularly the cleaning and dewatering property, and suitable surfactants to be applied to the invention include: anionic surfactants such as polyoxyalkylene alkylether sulfonates and phosphoric esters; nonionic surfactants such as polyalcohol fatty acid esters, polyoxyalkylene fatty acid esters, and polyoxyalkylene alkylethers; amphoteric surfactants such as imidazolin derivatives; and cationic surfactants such as alkylamine salts, alkyl quaternary ammonium salts. In addition thereto, terpene containing compounds which are rarely present in the form of a single substance and extracted from natural 20344~8 substances as well as higher fatty acid esters may also be applied. It is also possible to use synthetic compounds in which part of the chemical structure of each compound is substituted by a fluorine or silicon atom. However, it is more preferable to use nonionic surfactants if the effect as a dewatering cleaning agent used in combination with the low molecular weight polyorganosiloxane is to be further improved.
While the composition ratio of the surfactant is not particularly limited, it is desirable to have 20 parts by weight or less, or, more preferably, 3 parts by weight or less, of the surfactant to 100 parts by weight of low molecular weight polyorganosiloxane.
A suitable hydrophilic solvent may be one compatible with the low molecular weight polyorganosiloxanes, and more particularly, one whose flash point is 40C or more from the practical viewpoint. The hydrophilic solvent contributes to improving substituting property by water.
Suitable hydrophilic solvents include: polyalcohols and their derivatives such as ethylene glycol monomethyl ethers, ethylene glycol monoethyl ethers, ethylene glycol monopropyl ethers, ethylene glycol monobutyl ethers, ethylene glycol monobutyl ether acetates, diethylene glycol monobutyl ethers.
Particularly preferable are diethylene glycol monobutyl ethers from the viewpoint of its compatibility with the low molecular weight polyorganosiloxanes and safety to the human body and the like. Since these compounds exhibit improved properties when coexisting with the low molecular weight polyorganosiloxanes, a composition only using this combination may allow substitution ~0344~38 by water and drying.
While the composition ratio of the hydrophilic solvent is not particularly limited, it is preferable to have 100 parts by weight or less or, more preferably, 50 parts by weight or less of the hydrophilic solvent mixed with 100 parts by weight of the low molecular weight polyorganosiloxane.
The dewatering cleaning agents of the invention may be applied to metals, ceramics, plastics, and the like. More specifically, they may be applied to metallic parts, surface treated parts, electronic and semiconductor parts, electric and precision machinery parts, optical parts, glass and ceramic parts, and the like. An exemplary general-purpose cleaning process usually involves immersing of any of the above-described parts or spraying a dewatering cleaning agent of the invention onto the part to substitute it by water and drying by blowing hot air and the like. The immersing and spraying processes may be accompanied by an ultrasonic process and mechanical stirring.
The dewatering cleaning agents of the invention, exhibiting a powerful dewatering property, can not only provide cleaning and water-substituting effects equivalent to those of conventional cleaning agents containing flon and the like but also allow various materials to be stably cleaned with their low eroding action. In addition, containing no element halogen such as chlorine and bromine in general, the dewatering cleaning agents of the invention have few risk of destroying or polluting the environment. Thus, it can be said that the dewatering cleaning agents of the invention will be a viable replacement for the conventional organic solvent containing dewatering cleaning - - 20344~
agents such as freon*, which have been imposing the environmental problems.
Fig. 1 is a diagram showing an exemplary construction of a cleaning system using a dewatering cleaning agent of the invention.
The invention will now be described with reference to examples in which a cleaning composition of the invention is applied to water system cleaning agents.
Example 1 Two kinds (A1 and A2) of polyoxyalkylene group containing polyorganosiloxane, each represented by formula (V) and (VI), were prepared.
*trademark '' X
.
20~44~8 Al:
(CH3)3SiO- ( SiO-)8-('iO -)50 - Si(CH3)3 (CH2)3-O-(cH2cH2O)6 fH3 - (CH2CHO)6 - OCH3 ... ... ... (V) A2:
(SiO-)l -(SiO -)3 (CH2)3-O-(cH2cH2o)lo - H ... ... ... (VI) Then, the polyo yalkylene denatured silicone (Al) represented by formula (V), polyoxyalkylene denatured silicone (A2) represented by formula (VI), sodium laurate (B1) and polyoxyethylene octylphenyl ether ( B2) (20 moles of polyoxyethylene), both serving as surfactants, and water were weighed so that their ratio by weight will be 5 : 5 : 4 : 4 : 82.
Thereafter, these components were charged into a homogenizing mixer for blending to obtain a water system cleaning composition P1.
Example 2 The polyoxyalkylene group containing polyorganosiloxane (Al), the sodium laurate (B1) and polyoxyethylene octylphenyl ether (B2), both serving as surfactants, and water were weighed ~034488 so that they satisfy the composition ratio specified in Table 1.
Then, a water system cleaning composition P2 was obtained as in Example 1.
Examples 3 to 5 The polyoxyalkylene group containing polyorganosiloxanes (Al) and (A2), dioctyl sodium sulfosuccinate (B3) that serves as a surfactant in addition to the surfactants (Bl) and (B2), octamethyl tetrasiloxane (D1) and octamethyl trisiloxane (D2), both as low molecular weight polyorganosiloxanes, and water were selectively mixed to prepare water system cleaning compositions P3 to P5 having composition ratios specified in Table 1 in the same manner as that in Example 1.
Comparative examples 1 to 3 Three kinds of water system cleaning compositions were prepared in a manner similar to that of each of the above examples except that no polyoxyalkylene group containing polyorganosiloxane was mixed.
The properties as a cleaning agent were evaluated as to the water system cleaning compositions of Examples 1 to 5 and Comparative examples 1 to 3 by the following methods. The result is also shown in Table 1.
(1) Penetration test Measurements were made based on the JIS-specified canvas method. The smaller value means better penetrating property;
i.e., the composition is more effective in cleaning smaller parts.
(2) Cleaning property test A sample is prepared by applying a spindle oil over a steel strip and baking it at 135C for 48 hours. The property is evaluated by the time spent for cleaning the oil baked on the sample (by ultrasonic cleaning). The smaller the value is, the better the cleaning property becomes.
(3) Stability test Each composition was contained in a transparent bottle of 200 ml sealed thereafter and then heated at 50C for 6 hours.
After being graduall~ cooled from 50 to 25C, its appearance in the bottle is observed.
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As is apparent from the result shown in Table 1, the water system cleaning agent of the invention exhibits excellent cleaning capability and penetrability, attesting to its availability as a replacement for the conventional solvent based A fre~
1-~ cleaning agents containing flon and the like. With its stability, it is considered a highly practical product. In contradistinction thereto, the water system cleaning agents according to Comparative examples were satisfactory neither in cleaning capability nor in penetrability.
An exemplary process employed to clean a specific part using a water system cleaning agent of the invention will now be described.
Example 6 In fabricating a liquid crystal device, a liquid crystal cell is evacuated to a high vacuum degree and a liquid crystal material is sealed in a device. In this case, the evacuation is carried out by a high performance diffusion vacuum pump. Since the diffused oil enters into the vacuum system in the form of mist, the pump must be cleaned often to remove the oil.
In this example, the water system c]eaning agent of the invention was used in lieu of a conventional triethane cleaning agent.
A pump part made of a stainless steel SUS304 and a Ni-plated stainless steel SUS304 material having an adhesion of Silicon Oil F-4 (trademark of Shinetsu Chemical) as a diffusion oil was cleaned.
The composition ratio of the used water system cleaning agent is as shown below.
e ~7h 23 2~4488 That is, in 80 wt.% of ion-exchanged water being sufficiently stirred at ambient temperature, 6 wt.% of the polyoxyalkylene group containing polyorganosiloxane having the following chemical structure was gradually added to obtain an achxomatic translucent homogenous solution.
(~iO ) (SiO -)6 (CH2)3-O-(cE~2cH2O) 15 - H
On the other hand, as a surfactant, a mixture of 8 wt.% of special nonionic Adecanol B-4001 (trademark of Asahi Electrochemical) and 6 wt.% of anionic TWA-2023 (trademark of Ipposha Oil and Grease) of sulfuric acid ester PURLONIC structure was added to the above water/siloxane solution.
After diluting the water system cleaning agent thus obtained was diluted by ion-exchanged water at an arbitrary ratio, Silicone Oil F-4 was cleaned using the diluted cleaning agents.
As a result, the pump part was satisfactorily cleaned: through immersion by stirring for 1 minute in a 1/10 diluted cleaning agent at ambient temperature; through immersion by oscillating for 1 minute in a 1/30 diluted cleaning agent at 40C or through 1 minute ultrasonic cleaning at 20C in the same cleaning agent;
and through 1 minute ultrasonic cleaning in a 1/50 diluted cleaning agent at 50C, respectively.
For comparison, the pump part was similarly cleaned with compositions containing only surfactant(s) and no polyoxyalkylene group containing polyorganosiloxane. Silicone Oil was not removed sufficiently with 10 or more minute immersion ultrasonic cleaning in a 1/10 diluted composition at ambient temperature.
To remove Silicone Oil with this composition, it took more than 5 minutes at 65C or more.
It is understood from this data that the cleaning agent that incorporates the polyoxyalkylene group containing polyorganosiloxane of the invention exhibits an outstanding cleaning property.
Example 7 The polyoxyalkylene groupcontaining polyorganosiloxanes and the low molecular weight polyorganosiloxanes of the invention contribute to significantly improve the cleaning capability of commercially available water-soluble cleaning agents.
An aqueous solution of Chemiclean MS-109 (trademark of Sanyo Kasei Kogyo), which is a surfactant containing, low foaming, rust preventive cleaning agent, is typically used to clean mechanical and metallic parts. Blending 3 wt.% of the polyoxyalkylene denatured silicon (A1) represented by formula (V) in Example 1, 5 wt.% of cyclic hexamethylcyclotrisiloxane, 17 wt.% of ion-exchanged water with 65 wt.% of the above aqueous solution, a new cleaning composition was prepared.
This new cleaning composition was 1/20 diluted by ion-exchanged water and its cleaning property was evaluated by the following method. The result is shown in Table 2. For comparison, the evaluation result of 1/20 diluted Chemiclean MS-109 was also shown.
Test Method (1) Cleaning test - 1 The following contaminants were applied to a degreased aluminum plate (AC-~A) by immersing, dried by blowing, and immersed whi].e stirred (400 rpm) in respective cleaning agents (1/20 diluted) for 15 seconds to 1 minute. Then, after immersed in water, the aluminum plate was dried by blowing. Each contaminant was transferred on white paper through an adhesive tape for reflectance measurement by a colorimeter thereby to calculate the cleaning rate.
Contaminant:
Spindle oil 78%
Fatty acid ester 15%
Ch~.orinated paraffin5%
Carbon black 2%
Cleaning rate (%) = Rw - Rs / Ro - Rs Ro: Reflectance of the original white paper Rs: Reflectance of the standard contaminated plate Rw: Reflectance of the contaminated plate after cleaned (Z) Cleaning test - 2 A contaminant was prepared by adding 2% of carbon black to a water-soluble machining oil (emulsive), and the test was performed in a manner similar to that of Cleaning test - 1. Its cleaning rate was similarly calculated.
Table 2 2034488 Immersion time Cleaning rate (%) (second) Invention MS-109 72.4 59.0 Cleaning test - 1 30 86.5 65.2 100.0 67.8 Cleaning test - 2 15 81.7 58.0 g3.8 71.0 203~88 Similar tests were conducted on EP-680 (trademark of E.P.
Japan) which is a commercially available supereffective cleaning solution and water system cleaning agent; Banrise D-20 (trademark of Joban Chemical Industries) which is an emulsive degreased cleaning agent; and Hikari ~ce (trademark of Shoko Trade) which is a powerful special cleaning agent. As a result, these cleaning agents, when used in combination of the polyoxyalkylene group containing polyorganosiloxane and the low molecular weight polyorganosiloxane of the invention, exhibited a significantly improved cleaning property.
Example 8 The water system cleaning agent of the invention exhibits remarkable effect on cleaning of fluxes used in mounting electronic parts on printed boards. The flux comes roughly in two types: rosin containing and water-soluble. A specific example of cleaning rosin containing fluxes, which is said to be a difficult task, will now be described.
As a step prior to soldering a part on a printed board, a WW rosin ester was put on a part and immersed in a solder bath at 230 to 250C and then the part was mounted. It was observed that the flux was completely removed when the printed board was shower-rinsed for 35C for 45 seconds using a water system cleaning agent described below.
The water system cleaning composition used here is prepared by blending 2 wt.% of the polyoxyalkylene group containing polyorganosiloxane represented by formula (VII), 3 wt.% of Senkanol FM (trademark of Nippon Senka), which is an amphoteric surfactant, 5 wt.% of Nikkol CMT-30 (trademark of Nippon 20344s8 Surfactant), which is a sodium-N-COCOIL methyl taurine containing nonionic surfactant, and adding ion-exchanged water to prepare 100 wt.% of the composition.
~ ICH3 (C~3)3SiO- ('~i~)s - (SiO -)35 - Si(CH3)3 ~ CH
- (CH2)3-O-(CH2CH20)6 ~
L (CH2CHO)4 - OCH3 ... ... ... (VII) When acceleration aging tests which guarantees US MIL-F-14256C stan~ard, surface insulation resistance tests, ion residual tests and the like were conducted on the above composition which was 1/10 diluted by ion-exchanged water, the results were satisfactory.
Examples in which cleaning compositions of the invention were applied to dewatering cleaning agents will now be described.
Examples 9 to 17 Octamethyltrisiloxane (El), octamethyltetrasiloxane (E2), and decamethylpentasiloxane (E3) were prepared as low molecular weight polyorganosiloxanes; polyoxyethylene oleyl ether (Fl) (P.O.E =6 moles), and polyoxyethylene octylphenyl ether (F2) (P.O.E = 10 moles) as surfactants; and diethylene glycol monobutyl ether (G1) as a hydrophilic solvent were prepared.
These components were selected and blended so that the composition ratio shown in Table 3 were satisfied to obtain respective dewatering cleaning agents.
Comparative examples 4 to 8 203~488 Flon 113, methylene chloride, isopropyl alcohol, and ethanol were prepared as conventional dewatering cleaning agents to obtain 5 types of dewatering cleaning agents whose composition ratios were as shown in Table 3.
The properties of Examples 9 to 17 and Comparative examples 4 to 8 were evaluated by the following methods. The result is also shown in Table 3.
(1) Dewatering property Various pieces (a stainless steel strip, a ceramic piece, a polycarbonate piece, a Ni-plated steel strip) were immersed in each dewatering cleaning agent after washed by water. In examples 13 to 15, each piece was then rinsed by the low molecular weight polyorganosiloxane blended to prepare each dewatering cleaning agent. Thereafter, each piece was dried in an oven at 50C. The water marks (a stain by impurities dissolved in water) after drying each piece was observed visibly and by a scanning electron microscope and evaluated in accordance with the following criteria.
XX: Not evaluable due to erosion of the piece during dewatering.
X: Water marks were visibly observed.
o: No water marks were visibly observed.
~: No water marks whose size is 50 ~m or more were observed by the scanning electron microscope.
(2) Continuous dewatering property A continuous dewatering test with a frequency of 50 times were conducted on a stainless steel strip and the appearance of the strip was evaluated in a manner similar to that of item (1).
20~4~88 (3) Drying property The stai.nless steel strip was immersed in each dewatering cleaning agent and dried in the oven at 50C. During the drying process, the strip was touched by a finger to see the drying condition every 5 minutes and the time required for drying was recorded on a 5-minute basis.
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2034~88 As is apparent from the result shown in Table 3, the dewatering cleaning agents of the invention, exhibiting satisfactory dewatering property, can be a viable substitute for organic solvent containing flon and the like based cleaning agents.
Dewatering cleaning agents containing methylene chloride or isopropyl alcohol (Comparative examples 4 and 5) rust and erode metal films and plastics. In contradistinction thereto, the dewatering c]e ning agents of the invention are stable to metal films and plastics and exhibit satisfactory dewatering property even to ceramics wh;ch have large surface roughness values, thereby ensuring their reliability when applied to parts including metal, plated, electronic, semiconductor, plastic, and ceramic parts. The dewatering cleaning agent containing isopropyl alcohol permitted water to be dissolved therein, thereby causing water to present on the part again.
Moreover, it is understood that mixing of surfactants and hydrophilic solvents with the dewatering cleaning agents of the invention improved the dewatering property, thereby attesting to their industrial applicability.
An exemplary cleaning system using a dewatering cleaning agent of the invention will now be described with reference to Fig. 1.
A cleaning system shown in Fig. 1 consists roughly of a cleaning/water-substituting process A and a rinsing/dewatering process B.
The cleaning/water-substituting process A, which is the f.irst process involves a first cleaning vessel 1 and a second 203~8 cleaning vessel 2, each serving both as a separator through sedimentation and a separator through overfLow, and a dewatering vessel 3. The first and second cleaning vessels 1 and 2 communi.cate with each other through a drain line 2a and an overflow line 2b. The first and second cleaning vessels 1 and 2 are operated together with ultrasonic, oscillating, mechanical stirring, cleaning agent heating, and brushing processes and the like, if necessary.
The first and second cleaning vessels 1 and 2 respectively contain a cleaning agent D1 composed of a low molecular weight polyorganosiloxane and a surfactant, which is one of the dewatering cleaning agents of the invention. The surfactant containing cleaning agent Dl may be so prepared that its specific gravity is smaller than that of water and larger than that of an oily stain. Therefore, water Y introduced by an object to be cleaned X is separated by being sedimentated at the bottom of the surfactant containing cleaning agent D1 that has been charged in the first and second cleaning vessels 1 and 2. If an oily stain Z is present on the object X, the oily stain Z is separated by floating upward in the surfactant containing cleaning agent Dl in the first and second cleaning vessels 1 and 2.
The water Y separated by being sedimentated in the second cleaning vessel 2 is intermittently discharged to the first cleaning vessel 1 through a drain line 2a wh;le the water Y
separated by being sedimentated in the first cleaning vessel 1 is intermittently discharged to a cleaning agent recycling mechanism C (described later) through a drain line 4. A drain line 3a connected to the drainage vessel 3 is also connected to 2~)34488 the cleaning agent recycling mechanism C.
The oily stain Z separated by floating in the first and second vessels 1 and 2 is di.scharged outside while continuously overflown through an overflow line 5 connected to the first cleaning vessel 1.
The surfactant containing cleaning agent Dl charged in the first and second cleaning vessels 1 and 2 is continuously circul~ted through a filter 6 that ser~res to remove solid particles, H20 particles, undissolved substances, and the like contained in the cleaning agent Dl.
The rinsing/dewatering process B, which is the second process, involves a third cleaning vessel 7 and a shower rinse vessel 8. Below the shower rinse vessel 8 is a buffer tank 9 that communicates with the third cleaning vessel 7 through a drain line 9a and an overflow line 9b. The third cleaning vessel 7 is also operated together with ultrasonic, oscillating, mechanical stirring, cleaning agent heating, and brushing processes and the like, if necessary.
The third cleaning vessel 7 contains a cleaning agent D2 consisting only of a silicone composition identical to the low molecular weight polyorganosiloxane used in the first process A.
The cleaning agent D2 may be so prepared that its s`pecific gravity is smaller than that of water and larger than that of an oily stain. Therefore, as in the first process A, water Y is separated by being sedimentated at the bottom of the cleaning agent D2 and the oily stain Z is separated by floating upward in the cleaning agent D2.
The water Y separated by being sedimentated in the third 20~4488 cleaning vessel 7 is intermittently discharged to the cleaning agent recycling mechanism C through a drain line 10 while the oily stain Z separated by floating in the third cleaning vessel 7 is discharged outside through an overflow line 11.
Thc cleaning agent D2 charged in the third cleaning vessel 7 is continuously circulated through a filter 12 that serves to remove solid particles, H20 particles, undissolved substances, and the like contained in the cleaning agent D2.
The object to be cleaned X undergoes the first process A and then the second process B, cleaned and dewatered, and then dried by a fan forced drier (not shown) to complete the cleaning process.
The cleaning agent used in the cleaning system is subjected to the following recycling process.
As described above, the drain lines 4, 3a, 10 of the first, second, and third cleani.ng vessels 1, 2, and 7, and the dewatering vessel 3 are connected to the cleaning agent recycling mechanism C. The cleaning agent D1 or D2 contained in each cleaning vessel is constantly cleaned by the filters 6 and 12.
However, when heavily contaminated, the cleaning agent is introduced to the cleaning agent recycling mechanism C through drain lines 4 and 10 by a conveyer pump 13 for fractional distillation. The cleaning agent Dl deposited in the dewatering vessel 3 is also supplied intermittently to the cleaning agent recycling mechanism C.
At the cleaning agent recycling mechanism C, the introduced cleaning agent is separated into liquid components and solid components ~y a filter 14, and only the liquid components are ~034~88 forwarded to a distiller 15 with the solid components being destroyed. The distiller 15 separates various components, water, oily stains in the cleaning agent utilizing the difference in their boiling points. Water and the like that remain in the distiller 15 are further separated by a decanter 16.
Since the cleaning agent D1 is an agent having a surfactant added to the cleaning agent D2 that contains only the low molecular weight polyorganosiloxane, the low molecular weight polyorganosiloxane, i.e., the cleaning agent D2, can be extracted from both cleaning agents Dl and D2, thereby allowing the cleaning agent D2 to be recycled. The components other than the recycled cleaning agent ~2, i.e., the surfactant, water, and the like will be destroyed.
The recycled cleaning agent D2 iS forwarded to a mixer 18 from which the cleaning agent Dl iS supplied to the shower rinse vessel 8, the third cleaning vessel 7, or the second cleaning vessel 2 through a line 17.
In the shower rinse vessel 8, a shower rinsing process is conducted using only the recycled cleaning agent D2 or a cleaning agent D2 newly introduced through a cleaning agent supply line 19, both being free from impurities.
The mixer 18 mixes the recycled or new cleaning agent D2 with the surfactant newly supplied from a surfactant supply line 20 to prepare a new cleaning agent Dl. The new cleaning agent Dl is supplied to the second cleaning vessel 2, if necessary.
With the cleaning system of such construction as described above, the dewatering cleaning agents of the invention can be used efficiently and effectively enjoying the advantage of 203448~
- excellent cleaning properties.
Industrial Applicability As described in the foregoing pages, the cleaning compositions of the invention, when used as water system cleaning agents, exhibit a cleaning effect equivalent to that of .~ -f~e~
conventional flon containing cleaning agents and an excellent stability as a water system with no risk of enviromental destruction and pollution, thereby making a viable replacement ~ r~
for the organic solvent based cleaning agents including-flon and the like which have environmental disadvantages. In addition, the cleaning compositions of the invention, when used as dewatering cleaning agents, provide a powerful dewatering property with no risk of environmental destruction and pollution, thereby serving a viable replacement for the organic solvent based dewatering cleaning agents including flon and the like which have environmental disadvantages.
~aJ~ ~k
Claims (32)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A cleaning composition comprising:
at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula:
(I) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula:
(II) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7);
polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
... ... ... (III) (wherein R is an alkyl group or a phenyl group, and A is a single-valence group represented by a general formula:
... ... ... (IV) (wherein R3 is a two-valence group selected from the group consisting of an alkylene group having 1 to 8 carbon atoms, a .beta.-hydroxypropylene oxyalkylene group and a polymethylene oxyalkylene group, both having 4 to 11 carbon atoms; R4 is an alkylene group having 2 to 4 carbon atoms; R5 is an end group selected from a hydrogen atom and a single-valence organic group; and n is a positive integer;
a surfactant; and water.
at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula:
(I) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula:
(II) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7);
polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
... ... ... (III) (wherein R is an alkyl group or a phenyl group, and A is a single-valence group represented by a general formula:
... ... ... (IV) (wherein R3 is a two-valence group selected from the group consisting of an alkylene group having 1 to 8 carbon atoms, a .beta.-hydroxypropylene oxyalkylene group and a polymethylene oxyalkylene group, both having 4 to 11 carbon atoms; R4 is an alkylene group having 2 to 4 carbon atoms; R5 is an end group selected from a hydrogen atom and a single-valence organic group; and n is a positive integer;
a surfactant; and water.
2. A water system cleaning agent comprising:
polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
... ... ... (III) (wherein R is an alkyl group or a phenyl group, and A is a polyoxyalkylene group), a sufactant, and water.
polyoxyalkylene group containing polyorganosiloxane having in a single molecule at least one siloxy unit represented by a general formula:
... ... ... (III) (wherein R is an alkyl group or a phenyl group, and A is a polyoxyalkylene group), a sufactant, and water.
3. A water system cleaning agent according to claim 2 wherein said surfactant is mixed within the range of 10 to 1000 parts by weight to 100 parts by weight of said polyoxyalkylene group containing polyorganosiloxane, and said water is contained by 40 wt. % or more of the total composition.
4. A cleaning method for cleaning at least one material selected from the group consisting of a metal, a ceramic, and a plastic with a cleaning agent consisting essentially of at least one low molecular weight cyclic polydiorganosiloxane represented by a general formula:
... ... ... (II) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7).
... ... ... (II) (wherein R1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7).
5. A cleaning method comprising a cleaning step in which a material to be cleaned is cleaned by removing a liquid in a cleaning tank containing a liquid removing cleaning agent and a rinsing step in which said material to be cleaned undergone the liquid removing cleaning is successively rinsed and cleaned in a plurality of rinsing and cleaning tanks which contain a rinsing and cleaning agent and are connected such that said rinsing and cleaning agent is successively sent in a direction opposite from that said material to be cleaned is sent, said rinsing step being conducted by recovering drainage from the rinsing and cleaning tank positioned at the lowermost stream of said plurality of rinsing and cleaning tanks, distilling the recovered drainage to reproduce, and supplying the reproduced rinsing and cleaning agent to the rinsing and cleaning tank positioned at the uppermost stream.
6. A cleaning method according to claim 5 wherein said drainage is filtered in the pretreatment before said distillation.
7. A method for cleaning and dewatering metal parts, glass parts, ceramic parts or plastic parts having a hard surface, comprising the steps of:
(a) washing a part with an aqueous composition whereby water remains on the part, (b) treating the part which contains water on its surface with a cleaning composition consisting essentially of (i) at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, and (ii) at least one of a surfactant and hydrophilic solvent wherein the cleaning composition is substantially free of water, whereby water is removed from the surface of the part and residual cleaning composition remains on the part, and (c) removing residual cleaning composition by treatment with a rinsing agent comprising the same or different said straight-chain polyorganosiloxane or said cyclic polyorganosiloxane used in step (b), and (d) drying said part to completely remove said rinsing agent from the part.
(a) washing a part with an aqueous composition whereby water remains on the part, (b) treating the part which contains water on its surface with a cleaning composition consisting essentially of (i) at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, and (ii) at least one of a surfactant and hydrophilic solvent wherein the cleaning composition is substantially free of water, whereby water is removed from the surface of the part and residual cleaning composition remains on the part, and (c) removing residual cleaning composition by treatment with a rinsing agent comprising the same or different said straight-chain polyorganosiloxane or said cyclic polyorganosiloxane used in step (b), and (d) drying said part to completely remove said rinsing agent from the part.
8. A method according to claim 7, wherein the part comprises a metallic part.
9. A method according to claim 7, wherein the part comprises a surface-treated part.
10. A method according to claim 7, wherein the part comprises a electronic part.
11. A method according to claim 7, wherein the part comprises a semiconductor part.
12. A method according to claim 7, wherein the part comprises a precision machinery part.
13. A method according to claim 7, wherein the part comprises a optical part.
14. A method according to claim 7, wherein the part comprises a glass part.
15. A method according to claim 7, wherein the part comprises a ceramic part.
16. A method according to claim 7, wherein the part comprises a plastic part having a hard surface.
17. A method according to claim 7, wherein the cleaning composition consists essentially of one or more of the cyclic polyorganosiloxanes.
18. A method according to claim 7, wherein the cleaning composition comprises one or more of a surfactant or hydrophilic solvent.
19. A method according to claim 7, wherein the method further comprises the use of an ultrasonic process.
20. A method according to claim 7, wherein said drying comprises heating the part to a temperature of 60°C or less.
21. A method according to claim 7, wherein said drying comprises exposing the part to air.
22. A method according to claim 7, wherein said drying comprises exposing the part to heated air.
23. A method according to claim 7, wherein said drying comprises drying in a heated oven.
24. A method according to claim 7, wherein the treating of step (b) takes place in a vessel which contains the cleaning composition, and wherein said rinsing comprises use of a ringing agent which consist essentially of the polyorganosiloxanes used in the cleaning step.
25. A method for cleaning and dewatering an object comprising the steps of:
(a) a cleaning step comprising dewatering and cleaning an object to be cleaned containing water on its surface in a cleaning vessel containing a dewatering polyorganosiloxane cleaning agent, and (b) a rinsing comprising rinsing and cleaning said object after the dewatering and cleaning by use of a plurality of rinsing cleaning vessels in sequence, each of the rinsing cleaning vessels containing a polyoxyorgano-siloxane rinsing cleaning agent, the rinsing cleaning vessels being connected with each other such that said rinsing cleaning agent is transmitted in sequence in the direction opposite to that in which the object is transmitted;
wherein said rinsing step is conducted while a rinsing cleaning waste liquid is recovered from the most downstream rinsing cleaning vessel of said plurality of rinsing cleaning vessels, wherein the recovered rinsing cleaning waste liquid is distilled to recover polyorganosiloxanes, and wherein the recovered polyorganosiloxanes are resupplied to the one or more of the rinsing cleaning vessels, and (c) drying said part to completely remove said rinsing agent from the part.
(a) a cleaning step comprising dewatering and cleaning an object to be cleaned containing water on its surface in a cleaning vessel containing a dewatering polyorganosiloxane cleaning agent, and (b) a rinsing comprising rinsing and cleaning said object after the dewatering and cleaning by use of a plurality of rinsing cleaning vessels in sequence, each of the rinsing cleaning vessels containing a polyoxyorgano-siloxane rinsing cleaning agent, the rinsing cleaning vessels being connected with each other such that said rinsing cleaning agent is transmitted in sequence in the direction opposite to that in which the object is transmitted;
wherein said rinsing step is conducted while a rinsing cleaning waste liquid is recovered from the most downstream rinsing cleaning vessel of said plurality of rinsing cleaning vessels, wherein the recovered rinsing cleaning waste liquid is distilled to recover polyorganosiloxanes, and wherein the recovered polyorganosiloxanes are resupplied to the one or more of the rinsing cleaning vessels, and (c) drying said part to completely remove said rinsing agent from the part.
26. A method for cleaning and removing water from metal parts, glass parts, ceramic parts, or plastic parts having a hard surface, comprising the step of removing water from a part which contains water on its surface by treating with a cleaning composition consisting essentially of one or more of a surfactant or hydrophilic solvent and at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
27. A method according to claim 26, wherein after the cleaning step, the part is rinsed with a rinsing composition.
28. A method according to claim 26, wherein the rinsing composition comprises a polyorganosiloxane.
29. A continuous method for cleaning and removing water from an object comprising the steps of:
(a) cleaning the object and removing water from the object by use of a cleaning composition consisting essentially of at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and (b) recovering the polyorganosiloxane of the cleaning composition and recycling it back into the method, and completely drying the part to remove the cleaning composition.
(a) cleaning the object and removing water from the object by use of a cleaning composition consisting essentially of at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and (b) recovering the polyorganosiloxane of the cleaning composition and recycling it back into the method, and completely drying the part to remove the cleaning composition.
30. A method for removing water from industrial parts comprising the step of treating a part having water on its surface with a composition to remove water on the parts surface, wherein the composition consists essentially of at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
31. A method for deliquifying and cleaning an object comprising the steps of:
(a) treating the object an aqueous cleaning agent such that residual water remains on the object, and (b) then removing this water by treating the object with a composition consisting essentially of at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the composition.
(a) treating the object an aqueous cleaning agent such that residual water remains on the object, and (b) then removing this water by treating the object with a composition consisting essentially of at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the composition.
32. A method for cleaning and removing water from an object comprising the step of:
subjecting the object to be cleaned to an ultrasonic treatment and washing the part to clean the part and remove water from the part, with a composition consisting essentially at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
subjecting the object to be cleaned to an ultrasonic treatment and washing the part to clean the part and remove water from the part, with a composition consisting essentially at least one polyorganosiloxane not-compatible with water selected from the group consisting of a straight chain polyorganosiloxane represented by the formula:
, and a cyclic polyorganosiloxane represented by the formula:
wherein R1 in each of the above formulas is independently selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, trifluoro-methyl, amino, amide, acrylic acid ester and mercaptan; 1 is an integer from 0 to 5; and m is an integer from 3 to 7, wherein the cleaning composition is substantially free of water, and completely drying the part to remove the cleaning composition.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002151847A CA2151847A1 (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
CA002151848A CA2151848A1 (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
CA002151849A CA2151849A1 (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
CA002151846A CA2151846A1 (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
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JP28086089 | 1989-10-26 | ||
JP30258089 | 1989-11-21 | ||
JP6584190 | 1990-03-16 | ||
JP6584290 | 1990-03-16 | ||
JP2-065841 | 1990-03-16 | ||
JP2-065842 | 1990-03-16 | ||
JP1-280860 | 1990-03-16 | ||
JP1-302580 | 1990-03-16 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002151847A Division CA2151847A1 (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
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Publication Number | Publication Date |
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CA2034488A1 CA2034488A1 (en) | 1991-04-27 |
CA2034488C true CA2034488C (en) | 1997-01-07 |
Family
ID=27464632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002034488A Expired - Fee Related CA2034488C (en) | 1989-10-26 | 1990-10-25 | Cleaning compositions |
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US (8) | US5443747B1 (en) |
EP (3) | EP0458969B1 (en) |
KR (1) | KR930007226B1 (en) |
CN (2) | CN1042353C (en) |
CA (1) | CA2034488C (en) |
DE (2) | DE69031030T2 (en) |
HK (1) | HK1001094A1 (en) |
MY (4) | MY107434A (en) |
RU (1) | RU2104331C1 (en) |
SG (1) | SG47816A1 (en) |
WO (1) | WO1991006621A1 (en) |
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