Claims
- 1. A coated abrasive composition consisting essentially of:
- (A) A hard mineral substance having a hardness on the Mohs' scale of 2 or more and a particle size of from about 1 to about 30 microns; and as a coating for said hard mineral substance,
- (B) from about 2 to about 25% by weight, based on the weight of said hard mineral substance, of a cationic water-soluble polymer having a cationic charge density of at least 0.003 and a molecular weight of from about 500 to about 1,000,000, said polymer being selected from the group consisting of:
- (a) polyacryloxyalkyl ammonium salts;
- (b) polymethacryloxyalkyl ammonium salts;
- (c) polyacryloamido alkyl ammonium salts;
- (d) polyalkenyl ammonium salts;
- (e) polyvinyloxy ammonium salts;
- (f) polyvinylbenzyl ammonium salts;
- (g) polydiallyl ammonium salts;
- (h) polyvinyl pyridinium ammonium salts;
- (i) polyvinylimidazolium salts;
- (j) polyalkylation quaternaries; and
- (k) poly condensation quaternaries.
- 2. The composition of claim 1 wherein the amount of said cationic water-soluble polymer is from about 3 to about 15% by weight, based on the weight of said hard mineral substance.
- 3. The composition of claim 2 wherein the hard mineral substance is selected from the group consisting of:
- (A) silica;
- (B) calcium silicate;
- (C) silicon carbide;
- (D) alumina;
- (E) ilmenite;
- (F) hematite;
- (G) zirconium silicate;
- (H) calcium pyrophosphate;
- (I) calcium carbonate;
- (J) tricalcium phosphate;
- (K) dicalcium orthophosphate; and
- (L) insoluble metaphosphate.
- 4. The composition of claim 3 wherein the hard mineral substance is an amorphous silica.
- 5. The composition of claim 4 wherein the hard mineral substance is a silica xerogel.
- 6. The composition of claim 3 wherein the cationic water-soluble polymer is selected from the group consisting of: ##STR13## where n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of from 500 to 1,000,000, R.sub.1 is either H or CH.sub.3, x is from 2 to about 5, R.sub.2, R.sub.3 and R.sub.4 are the same or different alkyl radicals of from 1 to 4 carbon atoms or an aryl radical, and X.sup.- is a halide ion or HSO.sub.4.sup.- or CH.sub.3 SO.sub.4.sup.-, ##STR14## where x = 1- 14, n is the number of repeating monomeric groups, and is selected so as to give a polymeric molecular weight of from 500 to 1,000,000, R.sub.1 and R.sub.2 are CH.sub.3, and X.sup.- is a halide ion, ##STR15## where x = 2- 6, y = 3- 20, n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of from 500 to 1,000,000, R.sub.1 and R.sub.2 are CH.sub.3, and X.sup.- is a halide ion, ##STR16## x = 1- 12, n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and X.sup.- is a halide ion, ##STR17## x = 6- 10, n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and X.sup.- is a halide ion, ##STR18## x = 6- 10, n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and x.sup.- is a halide ion, ##STR19## n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and X.sup.- is a halide ion, ##STR20## n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and X.sup.- is a halide ion, ##STR21## n is the number of repeating monomeric groups and is selected so as to give a polymeric molecular weight of 500 to 1,000,000, and X.sup.- is a halide ion, ##STR22## where n is an integer varying from 4 to 40.
- 7. The composition of claim 4 wherein the cationic water-soluble polymer has the structure: ##STR23## where n is an integer varying from 4 to 40.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation of the application of James J. Benedict having Ser. No. 471,941, filed May 21, 1974 now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
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471941 |
May 1974 |
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