CN104693324A - Method for adjusting surface tension of polybutadiene super-size latex - Google Patents
Method for adjusting surface tension of polybutadiene super-size latex Download PDFInfo
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- CN104693324A CN104693324A CN201310655142.7A CN201310655142A CN104693324A CN 104693324 A CN104693324 A CN 104693324A CN 201310655142 A CN201310655142 A CN 201310655142A CN 104693324 A CN104693324 A CN 104693324A
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Abstract
The invention relates to a method for adjusting the surface tension of polybutadiene super-size latex. The method is characterized in that polybutadiene super-size latex is added into a storage tank and then injected into tubular membrane separators; the tubular membrane separators are arrayed in a water tank; deionized water is located at the outer side of a pipe, and a circulating latex material is located at the inner side of the pipe; the latex comes back to the storage tank through the membrane separators; a constant temperature apparatus is arranged in the water tank; the temperature of the deionized water is 15 to 25 DEG C; the temperature of the latex is 15 to 25 DEG C; and the deionized water is regularly replaced, once every half hour. The method provided by the invention guarantees stability of the polybutadiene super-size latex and rapid and repeated reverse osmosis.
Description
Technical field:
The invention belongs to engineering plastics production technical field, particularly a kind of method of polyhutadiene super-size (about 600nm) surface tension of latex.
Background technology
ABS resin is one of five large synthetic resins, its shock resistance, thermotolerance, lower temperature resistance, chemical proofing and excellent electrical properties, also there is the features such as easy processing, product size is stable, surface luster property is good, easy application, painted, surface metallization, plating, welding, hot pressing and the secondary processing such as bonding can also be carried out, being widely used in the industrial circles such as machinery, automobile, electronic apparatus, instrument, weaving and building, is the thermoplastic engineering plastic that a kind of purposes is extremely wide.
Plastics ABS resin is that current production rate is maximum, most widely used polymkeric substance, and the various performances of PB, PAN, PS are organically united by it, has tough, hard, just balanced mutually excellent mechanical property concurrently.ABS is vinyl cyanide, divinyl and cinnamic terpolymer, and A represents vinyl cyanide, and B represents divinyl, and S represents vinylbenzene.Plastics ABS has excellent mechanical property, and its shock strength is fabulous, can use at very low temperature; The high abrasion resistance of plastics ABS, good stability of the dimension, has oil-proofness again, can be used for the bearing under medium load and rotating speed.The creep resistant of ABS is larger than PSF and PC, but less than PA and POM.The flexural strength of ABS and compressive strength belong to poor in plastics.The mechanical property of ABS is larger by the impact of temperature.
Along with industrial expansion, the Application Areas of ABS resin is more and more wider, therefore also more and more higher to the performance requriements of ABS resin, especially shock strength and tensile strength.And in order to improve the shock strength of ABS product, other Performance Ratios often to be lost as tensile strength, surface gloss etc.In order to improve the shock strength of ABS resin, each major company have employed different way.The maximum of current employing are exactly use the rubber of macroparticle or prepare bimodal ABS resin.Current bimodal grafting mainly adopts super-size (about 600nm) latex and the blending in certain proportion of Large stone (about 300nm) latex, and the technology adopting appropriate emulsifying agent to control percentage of grafting exceeds a lot of bimodal ABS resin of general ABS resin to obtain shock strength.
The preparation of super-size (about 600nm) latex is very important, is the prerequisite of bimodal ABS technology.There are direct polymerization method, agglomeration technique etc. at present.Super-size (about 600nm) latex is produced in agglomeration technique preparation, has reaction times short, the advantage such as particle diameter is large.In order to keep the stability of super-size (about 600nm) latex, be all add a lot of tensio-active agent in the middle of super-size latex usually, such as potassium oleate, isproportionated potassium rosinate, Sodium dodecylbenzene sulfonate etc.Although these measures add the stability of super-size latex, can also there is drawback.In some grafting formula, based on not wishing latex super-size latex in containing too much tensio-active agent because these tensio-active agents affect graft reaction possibly, the production for some special trade mark ABS is disadvantageous.These tensio-active agents are exactly the surface tension size of latex in the direct performance of super-size latex.When in latex, other factors are fixed, tensio-active agent is more, and surface tension is less, finally levels off to a stationary value.So for specific a kind of super-size (about 600nm) latex, controlling its surface tension, is exactly the content of control surface promoting agent.
Remove tensio-active agent in super-size (about 600nm) latex more than adding tensio-active agent complexity.Traditional method is helpless, all by the stability of infringement latex.Utilizing film to carry out process to latex is a kind of method preferably.Inorganic material film owing to having stable chemical nature, organic solvent-resistant, pore size distribution is narrow, physical strength is high, resistance to pressure is good, be convenient to the advantages such as cleaning.Mineral membrane comprises SPG film, ceramic membrane, quartz glass film, dull and stereotyped nickel film etc., and wherein the SPG film of Japanese Development and Production uses at most, the uniform micro that it contains column, interconnects.Therefore, employing inorganic materials SPG film is utilized to regulate polyhutadiene super-size surface tension of latex to be a kind of feasible method.
Summary of the invention
The object of the invention is the way utilizing membrane sepn, adopt inorganic materials SPG film, for specific a kind of super-size (about 600nm) latex, by the too much surfactant molecule reverse osmosis in latex in deionized water, reach and reduce surfactant content in super-size latex, control polyhutadiene super-size surface tension of latex.
Technical solution of the present invention is as follows:
Polyhutadiene super-size latex is added storage tank, is squeezed in the membrane separation apparatus of tubulose by pump, membrane separation apparatus arrangement in the sink, is deionized water outside pipe, and be the latex material of circulation inside pipe, latex is by getting back in storage tank after membrane separation apparatus.Have thermostat in tank, deionized water temperature is at 15 DEG C ~ 25 DEG C, and latex temperature is at 15 DEG C ~ 25 DEG C, and deionized water timing is changed, and per half an hour is changed once.
Described tubular film separator is the inorganic materials SPG film of tubulose.
After polyhutadiene super-size surface tension of latex is increased to the required value meeting graft polymerization, by emptying for latex storage tank, pipeline needs disassembly, cleaning.
Beneficial effect of the present invention:
(1) tubular film separator adopts inorganic materials SPG film, and intensity is higher, and it is higher that working pressure can set, and can increase counter osmosis, in the deionized water that surfactant molecule can be transferred in tank fast.
(2) by pump circulation polyhutadiene super-size latex, latex residence time in tubular film separator is short, and unsuitable wall built-up and blocking, both ensure that the stability of polyhutadiene super-size latex, and in turn ensure that counter osmosis can be carried out fast repeatedly.
Embodiment:
Embodiment 1
By 5000 grams, total solid content is 30%, surface tension is 29.0mN/m
2polyhutadiene super-size (about 600nm) latex add storage tank, fill it up with deionized water in tank, deionized water temperature is at 15 DEG C, latex temperature is at 15 DEG C, start latex recycle pump, squeezed into by latex in the membrane separation apparatus of tubulose, membrane separation apparatus is the inorganic materials SPG film of tubulose.Circulation latex, changes a deionized water per half an hour.After 5 hours, polyhutadiene super-size (about 600nm) surface tension of latex rises to 31.2, and total solid content remains on 30%, and latex stability is good.
Embodiment 2
By 5000 grams, total solid content is 28%, surface tension is 28.2mN/m
2polyhutadiene super-size (about 600nm) latex add storage tank, fill it up with deionized water in tank, deionized water temperature is at 25 DEG C, latex temperature is at 25 DEG C, start latex recycle pump, squeezed into by latex in the membrane separation apparatus of tubulose, membrane separation apparatus is the inorganic materials SPG film of tubulose.Circulation latex, changes a deionized water per half an hour.After 4 hours, polyhutadiene super-size (about 600nm) surface tension of latex rises to 30.3, and total solid content remains on 28%, and latex stability is good.
Claims (2)
1. one kind regulates the method for polyhutadiene super-size surface tension of latex, it is characterized in that: polyhutadiene super-size latex is added storage tank, squeezed in the membrane separation apparatus of tubulose by pump, membrane separation apparatus arrangement in the sink, it is deionized water outside pipe, it is the latex material of circulation inside pipe, latex is by getting back in storage tank after membrane separation apparatus, thermostat is had in tank, deionized water temperature is at 15 DEG C ~ 25 DEG C, latex temperature is at 15 DEG C ~ 25 DEG C, and deionized water timing is changed, and per half an hour is changed once.
2. a kind of method regulating polyhutadiene super-size surface tension of latex according to claim 1, is characterized in that: said membrane separation apparatus is the inorganic materials SPG film of tubulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310655142.7A CN104693324B (en) | 2013-12-06 | 2013-12-06 | A kind of method for adjusting polybutadiene super large grain size latex surface tension |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655142.7A CN104693324B (en) | 2013-12-06 | 2013-12-06 | A kind of method for adjusting polybutadiene super large grain size latex surface tension |
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| CN104693324A true CN104693324A (en) | 2015-06-10 |
| CN104693324B CN104693324B (en) | 2017-07-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160726A (en) * | 1976-05-07 | 1979-07-10 | Abcor, Inc. | Ultrafiltration process for the concentration of polymeric latices |
| US20080035571A1 (en) * | 2006-08-08 | 2008-02-14 | Exxonmobil Research And Engineering Company | Integrally-layered polymeric membranes and method of use |
| WO2013055202A1 (en) * | 2011-10-11 | 2013-04-18 | Sime Darby Malaysia Berhad | A method of recovering rubber from skim natural rubber latex |
| CN103724459A (en) * | 2013-12-25 | 2014-04-16 | 江苏久吾高科技股份有限公司 | Method for resource utilization of skim serum |
-
2013
- 2013-12-06 CN CN201310655142.7A patent/CN104693324B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160726A (en) * | 1976-05-07 | 1979-07-10 | Abcor, Inc. | Ultrafiltration process for the concentration of polymeric latices |
| US20080035571A1 (en) * | 2006-08-08 | 2008-02-14 | Exxonmobil Research And Engineering Company | Integrally-layered polymeric membranes and method of use |
| WO2013055202A1 (en) * | 2011-10-11 | 2013-04-18 | Sime Darby Malaysia Berhad | A method of recovering rubber from skim natural rubber latex |
| CN103724459A (en) * | 2013-12-25 | 2014-04-16 | 江苏久吾高科技股份有限公司 | Method for resource utilization of skim serum |
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| CN104693324B (en) | 2017-07-14 |
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