Abrasive composition

Claim 2

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.

Claim 3

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.

Claim 4

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.

Claim 5

The composition of claim 3 wherein the hard mineral substance is an amorphous silica.

Claim 6

The composition of claim 4 wherein the hard mineral substance is a silica xerogel.

Claim 7

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 1 is either H or CH 3 , x is from 2 to about 5, R 2 , R 3 and R 4 are the same or different alkyl radicals of from 1 to 4 carbon atoms or an aryl radical, and X - is a halide ion or HSO 4 - or CH 3 SO 4 - , ##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 1 and R 2 are CH 3 , and X - 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 1 and R 2 are CH 3 , and X - 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 - 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 - 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 - 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 - 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 - 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 - is a halide ion, ##STR22## where n is an integer varying from 4 to 40.

Claim 8

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.