| abstract |
1. A READILY WATER-DISPERSIBLE SOLID PARTICULATE POLYACRYLAMIDE COMPOSITION CONSISTING ESSENTIALLY OF (A) A SOLID PARTICULATE WATER-SOLUBLE ACRYLAMIDE POLYMER CONTAINING AT LEAST ABOUT 5 WEIGHT PERCENT ACRYLAMIDE AND THE BALANCE OF A COMONOMER WHICH PROVIDES A WATERSOLUBLE POLYMER AND, AS AT LEAST A PARTIAL COATING THEREON, (B) FROM ABOUT 0.1 TO 20 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID ACRYLAMIDE POLYMER, OF A WATER-SOLUBLE POLYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT IN THE RANGE OF 200 TO 10,000, SAID ACRHLAMIDE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 500,000 AND A PARTICLE SIZE SUFFICIENT TO PASS THROUGH ABOUT A 16-MESH SCREEN. |