US2544641A - Composition for filling the pores of grinding wheels and wheels filled therewith - Google Patents
Composition for filling the pores of grinding wheels and wheels filled therewith Download PDFInfo
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- US2544641A US2544641A US156711A US15671150A US2544641A US 2544641 A US2544641 A US 2544641A US 156711 A US156711 A US 156711A US 15671150 A US15671150 A US 15671150A US 2544641 A US2544641 A US 2544641A
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- Prior art keywords
- wheel
- composition
- fat
- grinding
- wheels
- Prior art date
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- Expired - Lifetime
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- 239000000203 mixture Substances 0.000 title claims description 59
- 238000000227 grinding Methods 0.000 title claims description 44
- 239000011148 porous material Substances 0.000 title description 19
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 31
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 23
- 239000005864 Sulphur Substances 0.000 claims description 23
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 17
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 17
- 235000021314 Palmitic acid Nutrition 0.000 claims description 8
- 235000021355 Stearic acid Nutrition 0.000 claims description 8
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000008117 stearic acid Substances 0.000 claims description 8
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 claims description 8
- 239000006061 abrasive grain Substances 0.000 claims description 7
- 150000001735 carboxylic acids Chemical class 0.000 claims description 6
- 239000003925 fat Substances 0.000 description 49
- 235000019197 fats Nutrition 0.000 description 49
- 239000000499 gel Substances 0.000 description 23
- 239000002480 mineral oil Substances 0.000 description 19
- 235000010446 mineral oil Nutrition 0.000 description 19
- 239000001993 wax Substances 0.000 description 18
- 239000002184 metal Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000000945 filler Substances 0.000 description 8
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 7
- 235000021360 Myristic acid Nutrition 0.000 description 7
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 235000019198 oils Nutrition 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 150000001470 diamides Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052976 metal sulfide Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000003760 tallow Substances 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Glycerol trioctadecanoate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- ZOJBYZNEUISWFT-UHFFFAOYSA-N allyl isothiocyanate Chemical compound C=CCN=C=S ZOJBYZNEUISWFT-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000008164 mustard oil Substances 0.000 description 1
- 239000010697 neat foot oil Substances 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000008171 pumpkin seed oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/348—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised as impregnating agent for porous abrasive bodies
Definitions
- the waxes are the diamide of ethylene diamine and myristic acid, the diamide of ethylene diamine and palmitic acid, the diamide of ethylene diamine and stearic acid and mixtures of such .diamides.
- the diamide of myristic acid has a melting point between 137 C. and 139 C. and is soluble in the sulphurized fat at about 140 C. and is the preferred wax.
- the diamides of palmitic acid and of stearic acid have melting points slightly lower than that of the diamide of myristic acid, but in each case above 120 C. All of these waxes, when molten, are soluble in the sulphurized natural fat at temperatures of about 140 C. and above.
- the polymer is formed which has the following structure:
Description
Patented Mar. 13, 1951 COM-PGS'ITIONFOR FILLING THE PORES OF GRINDING WHEELS AND WHEELS FILLED THEREWITH' Luring Coes, Jr., Brookfield, Mass, assignorto .Norton Company. Worcester, Mass-., a, corporation ofJMassachusetts NoDrawingi. Application April 18, 1950, SerialfNo. 156,711
" 8 Claims.
This invention relates-to. grinding wheels. and a treatment thereof to improve their quality. This application is a continuation in part of mycopending application serial- No. 721,665 filed J anuary 11, 1947 and. now abandoned.
One object of the inventionis. toprovide a faster cutting grinding; wheel. Another object of the invention is tozprovideatreatment which can be. applied to' already manufactured grinding wheels to increase the efiiciency thereof. Another object of. the inventionisto provide an improved filler. for a grinding wheel. .Another object of. th invention-late provide a rinding wheel, and, a. treatment for-a: grinding wheel which enables; it to removeea reater amount of stock for agiven amount ;of;wheelwear than heretofore,
Another object of thainventionisto: provide a filler in a grinding wheel which has a chemical action on metal workpieces. Another object is to provide a filler which shall substantially reduce loading of a grinding wheel. Another ob- .lect of the invention. is to setup in v a grinding wheel a chemical action on metal chips removed from a .work piece and lodged. in aportionthereot which shall loosen such chips, thus tending to eliminate loading. Another object isto'provide a filler for a grinding wheel" which reacts on the hot, metal chips removed from the work piece-in the grinding action so as to prevent such chips from sticking to the wheel, thuspreventing loading in the first place. Another object is to provide a filler for a grinding wheelwhich reacts on the material of the workpiece being ground to form at the grinding linea substance which is weak, brittle, machinable" and more easily removed during the grinding operation. Another object is to provide a filler for a grinding wheel which remains in the pores thereof at high wheel speeds.
The invention accordingly consists in the features of construction; combinations of elements, arrangements of parts. all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.
I' provide a porousgrinding wheel'having continuous pores such as a wheel bonded with any known vitrified ceramic or-resinoid bond. Such a wheel may be made according toany" known method. The wheel. is completely formed and fired or cured orthe bond is otherwise, set prior to the treatment'now to be described, so far as the preferred form ofmy' invention is concerned.
Having formed the grindinggwheel; which may be of any desired size and shape, I make a molten composition of sulphurized fat, mineral oil and a synthetic wax. The preferred composition consists of sulphurizedf-at, 10% mineral oil and 10% wax. To make the mixture I heat a quantity of unsaturated organic natural fat (which is an ester of glycerine) and sulphur until complete reaction between the sulphur and fat takes place, thus leaving no free fat. The temperature of reaction is about C. and I avoid temperatures which produce hydrogen sulphide. Any unsaturated natural animal or vegetable oil fat such as linseed oil or a mixture of such fats may be used as long as the total unsaturation is sufficient to allow an adequate percentage of sulphur to react withit for the purposes'intended; Other fats which can be used are olive oil, cotton seed oil, mustard oil, stearin, butter fat, horse fat. lard, neats foot oil, peanut oil, beef'tallow, castor bean oil, corn oil, mutton tallow, pumpkin seed oil.
I have found that 2.0% reactedsulphur in the oil or fat of the composition of, the invention is the maximum approximate percentage which can be economically achieved. Sulphur is the active. chemical agent of the composition and I thus attempt to, keep the total percentage of sulphur as high as possible. At this stage the product is pasty andenough mineral oil is added to produce a free flowing liquid. Any desired proportion of mineral oil from 0 tov 50% of the total. oil plus fat may beused, preferably I use the minimum amount necessary to reduce the viscosity of the composition to an easily penetrating" liquid. I have found that 10% mineral oil (of the, total oil mixture) is a good percentage.
I then maintain the temperature at about 140 C. and add a wax in the proportion of 10% of the entire composition. The waxes which I can use are the diamides of ethylene diamine and carboxylic acid selected from the group consisting ofmyristic acid, palmitic acid and stearic acid and mixtures thereof. These acids are aliphatic straight chain carboxylic acids and are closely related to each other, having formulae as set forth in the following table.
The waxes, therefore, are the diamide of ethylene diamine and myristic acid, the diamide of ethylene diamine and palmitic acid, the diamide of ethylene diamine and stearic acid and mixtures of such .diamides. The diamide of myristic acid has a melting point between 137 C. and 139 C. and is soluble in the sulphurized fat at about 140 C. and is the preferred wax. The diamides of palmitic acid and of stearic acid have melting points slightly lower than that of the diamide of myristic acid, but in each case above 120 C. All of these waxes, when molten, are soluble in the sulphurized natural fat at temperatures of about 140 C. and above. When ethylene diamine at a temperature above 100 C., the polymer is formed which has the following structure:
CH3 (CH2) 12CONHCH2- CH2--NHCO(CH2) 12CH3 This is the diamide of ethylene diamine and myristic acid. The other diamides of ethylene dlamine are similarly formed by reactiong ethylene diamine and the acid (palmitic or stearic). In the above reaction water is liberated. The function of the wax is to gel the composition upon cooling. However I maintain the temperature at about 140 C. until the process is completed, as follows.
Having made the composition of the invention and maintained it is a molten state, I submerge the grinding wheel in it to fill the pores of the wheel. The pores may be more completely filled if the composition and wheel are placed in a closed chamber, and the air therein is first evacuated and then readmitted while the wheel is submerged. The wheel is then left in the composition while the composition is allowed to cool. Upon cooling, the composition forms a gel, whereupon the wheel is removed from the composition and the excess cut off. The amount of high melting wax used in the composition is best adjusted so that the gelatinous filling has no tendency to be thrown out of the grinding wheel when it is running at grinding speed. Since the nascent sulphur is the efiective agent in improving the grinding action, increasing the percentage of wax content in the composition unnecessarily reduces the effective percentage of sulphur. The purpose of the wax is to form a gel which holds the filler in the grinding wheel against centrifugal force. The amount of wax should be between and of the entire composition.
The wheel may now be used for grinding. A number of grinding wheels were treated (filled) according to the invention as just described, the specific wax used having been the preferred wax, the diamide of ethylene diamine and myristic acid, and these wheels, when used on stainless steel, removed as much as 545%, nearly five and a half times, the stock removed by an untreated wheel of the same grade and structure otherwise. The wheels of the invention had a freer cutting action and less tendency to load. Wheel wear was reduced by as much as 55%.
The improved cutting ability of wheels containing the composition of the invention over wheels not containing it is shown by the following table. In each case the wheels used were made of crystalline alumina abrasive grains of grit size 80, bonded with a vitrified bond and hav ing an open, porous structure. The wheels each had a diameter of three inches, a thickness of one half inch and a hole of seven-eighths inch diameter. The specifications for all of the wheels were the same except that the grade of the bond in the wheels numbered 1 to 3 respectively progressed from soft to medium, being designated H, I, and J respectively, where A represents an extremely soft grade wheel and Z an extremely hard grade. Each wheel of a designated number was exactly the same except that the wheels designated Untreated contained no filler in the pores, while those designated Treated had been filled with the composition of and according to the invention. In each treated wheel the wax was the diamide ethylene diamine and myristic acid but the function of the wax is to produce the gel and the function of the gel is to keep the sulphurized natural fat in the wheels until it is actually consumed in grinding-hence the other two waxes can be used and will give comparable results for they too will produce gels which will keep the sulphurized natural fat in the wheels until actually consumed in grinding. The wheel number 3 designated Standard treatment was treated with a composition of beeswax and paraffin heretofore used in treating wheels. These wheels were tested in a grinding machine by grinding a cylindrical test bar of stainless steel one and one half inches in diameter heldin a rotating chuck with a total grinding wheel infeed of 20 mils at a constant rate for all wheels tested. Units of wheel wear and metal removed are given in mils. Metal removed was measured directly on the diameter of the work piece in each run, and wheel wear was found by subtracting the metal removed in each run from the total wheel feed of 20 mils in each case.
All of the above wheels which were treated with the composition according to the invention were also tested on a rotating brass cylindrical test piece. None of these wheels so treated showed any measurable wheel wear in 20 mils total wheel feed. These tests show a marked improvement in the cutting action due to the presence of sulphur in gelatinized form.
Having thus given concrete embodiments of my invention, the same should not be limited by the theories which I have as to the reasons for improved efliciency of grinding wheels made in accordance herewith. Nevertheless for a clearer understanding of the invention I now give my views as to the underlying cause of the improved results. Sulphur and metals, when combined in the presence of heat form metal sulphides. In every efiicient grinding operation heat is generated at the grinding line or point of contact where the wheel grinds the work. The heat generated decomposes the sulphurized fat composition of the invention in the grinding wheel pores and frees the sulphur which recombines with the metal -being ground to form a sulphide answer of that metal. 'Such'metalsulphides are weak, brittle and. easily :machinablen andare thusrmore easily ground away by the wheel. QThgsiilDhides have a much; lowenmelting point than; the pure metal and the grinding heat converts them more easily into the soft red hot particles which are seen as a shower of" sparks in a drygrinding operation. Everygrinding-wheel has a tendency to load to some; extentpthat is to accumulate particles of the material being. ground. Loading may involve an actual deposit ofmaterialfrom the work piece into'the pores of the grinding wheel or a sticking of the material of the work piece to the abrasive grains or to the bond or a combination of these. The hot particles which are torn away from the work piece by the grinding wheel have a tendency to weld themselves to the wheel. However the production of a chemical reaction on the metal particles by sulphur in the presence of heat to form a metal sulphide reduces the adhesion of the particles to the wheel and tends to prevent loading. If any pure metal has already stuck to the wheel, a chemical reaction involving it will tend to loosen it so that it will fly off the wheel. The composition of the invention forms a gel upon cooling which is resilient and deformable under stress yet does not flow as does parafiin or other solid waxes or fats under continued pressure or stress. The gel is made strong enough to resist the stresses at grinding speeds and so it tends always to return to its original position and shape in the pores of the wheel. Just enough nascent sulphur is then freed by the heat of grinding to form the metal sulphides with no loss of sulphur so that the beneficial efiect of the composition of the invention upon the grinding operation is continuous and long lasting.
The nascent sulphur liberated by the decomposition of the sulphurized fat is much more effective in forming sulphides of the material removed as an aid to grinding than sulphur as such would be.
The amides gel holds itself and the total composition in the pores of the wheel as explained. The sulphurized fat and the mineral oil are dissolved in the gel. The mineral oil and the sulphurized fat. when melted by the grinding action, act as lubricants and so promote grinding. The sulphurized fat is sufficiently lubricating so that the mineral oil could be omitted. Its function is chiefly to reduce viscosity at any given temperature, so the temperature of the composition when the wheel is impregnated therewith, can be lower if the mineral oil is included than if it were omitted. Thus the mineral oil facilitate impregnation. The total composition, with or without the mineral oil, is still a gel. This gel, at room temperature, is fairly stiff, about as stiff as paraffin.
It will thus be seen that there has been pro-- vided by this invention an article and a composition in which the various objects hereinabove set forth together with many thoroughly practical advantages are successfully achieved.
As many possible embodiments may be made of the above invention and as many changes might be made in the embodiments above set forth, it is to be understood that all matter hereinbefore set forth is to be interpreted as illustrative and not in a limiting sense.
I claim:
1. A grinding wheel comprising abrasive grains, bond holding the grains together to form the wheel, there being pores in the wheel, and a gel til which is the-diamide or ethylenezdiamine and carboxylic acid selectedfrom the group. consisting of myristic acid, palmitic acid and stearic acid and mixtures thereof having in solution therein a sulphurized natural fat, said diamide being from 5% to 20% of theentire composition, thesulphurized fat having from 10% to 20% sulphur-and the balance of the composition over-the diamide beingat least 50% said sulphurized fat, saidgel filling someofthe pores of the-wheel.
2. A grinding-wheel comprising abrasive grains, bond holding the grains together to form the wheel, there being pores in the wheel, anda gel which is the diamid of ethylene diamine and carboxyli'o-acid selected from the group consisting of myristic acid, palmitic acid and stearic acid and mixtures thereof having in solution therein a sulphurized natural fat and mineral oil, said diamide being from 5% to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the balance of thecomposition over the diamide being at least 50% said sulphurized fat, said gel filling some of the pores of the wheel, said mineral oil being not more than 50% of the total oil plus fat.
3. A grinding wheel comprising abrasive grains, bond holding the grains together to form the wheel, there being pores in the wheel, and a gel which is the diamid of ethylene diamine and myristic acid having in solution therein a sulphurized natural fat, said diamide being from to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the balance of the composition over the diamide being at least 50% said sulphurized fat, said gel filling some of the pores of the wheel.
4. A grinding wheel comprising abrasive grains, bond holding the grains together to form the wheel, there being pores in the wheel, and a gel which is the diamide of ethylene diamine and myristic acid having in solution therein a sulphurized natural fat and mineral oil, said diamide being from 5% to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the balance of the composition over the diamide being at least 50% of said sulphurized fat, said gel filling some of the pores of the wheel, said mineral oil being not more than 50% of the total oil plus fat.
5. As a new composition of matter, a gel which is the diamide of ethylene diamine and carboxylic acid selected from the group consisting of myristic acid, palmitic acid and stearic acid and mixtures thereof having in solution therein a sulphurized natural fat, said diamide being from 5% to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the balance of the composition over the diamide being at least 50% said sulphurized fat.
6. As a new composition of matter, a gel which is the diamide of ethylene diamine and carboxylic acid selected from the group consisting of myristic acid, palmitic acid and stearic acid and mixtures thereof, having in solution therein a sulphurized natural fat and mineral oil, said diamide being from 5% to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur, and the composition apart from the diamide being at least 50% said sulphurized fat, said mineral oil being not more than 50% of the total oil plus fat.
7. As a new composition of matter, a gel which is the diamide of ethylene diamine and myristic acid having in solution therein a sulphurized natural fat, said diamide being from 5% to 20% 7 of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the balance of the composition over the diamide being at least 50% said sulphurized fat.
8. As a new composition of matter, a gel which is the diamide of ethylene diamine and myristic acid having in solution therein a sulphurizednatural fat and mineral oil, said diamide being from 5% to 20% of the entire composition, the sulphurized fat having from 10% to 20% sulphur and the composition apart from the diamid being at least 50% said sulphurized fat, said mineral oil being not more than 50% of the total oil plus fat.
LORING COES, JR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,240,302 Jones Apr. 29, 1941 2,425,392 Robinson et a1 Aug. 12, 1947 FOREIGN PATENTS Number Country Date 321,240 Great Britain Nov. 7, 1929
Claims (1)
1. A GRINDING WHEEL COMPRISING ABRASIVE GRAINS, BOND HOLDING THE GRAINS TOGETHER TO FORM THE WHEEL, THERE BEING PORES IN THE WHEEL, AND A GEL WHICH IS THE DIAMIDE OF ETHYLENE DIAMINE AND CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MYRISTIC ACID, PALMITIC ACID AND STEARIC ACID AND MIXTURES THEREOF HAVING IN SOLUTION THEREIN A SULPHURIZED NATURAL FAT, SAID DIAMIDE BEING FROM 5% TO 20% OF THE ENTIRE COMPOSITION, THE SULPHURIZED FAT HAVING FROM 10% TO 20% SULPHUR AND THE BALANCE OF THE COMPOSITION OVER THE DIAMIDE BEING AT LEAST 50% SAID SULPHURIZED FAT, SAID GEL FILLING SOME OF THE PORES OF THE WHEEL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US156711A US2544641A (en) | 1950-04-18 | 1950-04-18 | Composition for filling the pores of grinding wheels and wheels filled therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US156711A US2544641A (en) | 1950-04-18 | 1950-04-18 | Composition for filling the pores of grinding wheels and wheels filled therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2544641A true US2544641A (en) | 1951-03-13 |
Family
ID=22560737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US156711A Expired - Lifetime US2544641A (en) | 1950-04-18 | 1950-04-18 | Composition for filling the pores of grinding wheels and wheels filled therewith |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2544641A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2768886A (en) * | 1954-06-29 | 1956-10-30 | Norton Co | Sandpaper |
| US3471277A (en) * | 1966-11-08 | 1969-10-07 | Cincinnati Milling Machine Co | Amide impregnated grinding wheels |
| US20040198205A1 (en) * | 2003-03-26 | 2004-10-07 | Toyoda Koki Kabushiki Kaisha | Grinding stone with lubrication particles and manufacturing method thereof |
| US9844853B2 (en) | 2014-12-30 | 2017-12-19 | Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs | Abrasive tools and methods for forming same |
| US10189145B2 (en) | 2015-12-30 | 2019-01-29 | Saint-Gobain Abrasives, Inc. | Abrasive tools and methods for forming same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB321240A (en) * | 1928-08-08 | 1929-11-07 | Carborundum Co | Improvements in or relating to abrasives and method of treating the same |
| US2240302A (en) * | 1940-09-12 | 1941-04-29 | Hugh H Jones | Composition for impregnating grinding wheels |
| US2425392A (en) * | 1939-05-20 | 1947-08-12 | Nopco Chem Co | Diamide textile lubricants |
-
1950
- 1950-04-18 US US156711A patent/US2544641A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB321240A (en) * | 1928-08-08 | 1929-11-07 | Carborundum Co | Improvements in or relating to abrasives and method of treating the same |
| US2425392A (en) * | 1939-05-20 | 1947-08-12 | Nopco Chem Co | Diamide textile lubricants |
| US2240302A (en) * | 1940-09-12 | 1941-04-29 | Hugh H Jones | Composition for impregnating grinding wheels |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2768886A (en) * | 1954-06-29 | 1956-10-30 | Norton Co | Sandpaper |
| US3471277A (en) * | 1966-11-08 | 1969-10-07 | Cincinnati Milling Machine Co | Amide impregnated grinding wheels |
| US20040198205A1 (en) * | 2003-03-26 | 2004-10-07 | Toyoda Koki Kabushiki Kaisha | Grinding stone with lubrication particles and manufacturing method thereof |
| US9844853B2 (en) | 2014-12-30 | 2017-12-19 | Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs | Abrasive tools and methods for forming same |
| US10189146B2 (en) | 2014-12-30 | 2019-01-29 | Saint-Gobain Abrasives, Inc. | Abrasive tools and methods for forming same |
| US10189145B2 (en) | 2015-12-30 | 2019-01-29 | Saint-Gobain Abrasives, Inc. | Abrasive tools and methods for forming same |
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