Patent ID: 6090875
Filing Date: 2000-07-18
Classification: C08J

Abstract:
A composition comprising water-absorbent water-insoluble polymer particles, the particles bearing on their surface a physical coating of an effective amount of a hydrophobic liquid dedusting agent, wherein the dedusting agent is an alkane having between about 7 and about 18 carbon atoms, an alkene having between about 7 and about 18 carbon atoms, a natural oil, a silicone oil, or an ester, alcohol, or acid thereof or a mixture thereof, wherein the polymer is a carboxyl-containing water absorbent polymer selected from the group consisting of hydrolyzates of starch-acrylonitrile graft copolymers, partially neutralized products of starch-acrylic acid or starch-polyvinyl alcohol graft copolymers, saponification products of vinyl acetate acrylic ester copolymers, derivatives of copolymers of isobutylene and maleic anhydride, hydrolyzates of acrylonitrile copolymers, crosslinked products of hydrolyzates of acrylonitrile copolymers, crosslinked carboxyl methyl cellulose, crosslinked products of hydrolyzates of acrylamide copolymers, and partially neutralized products of polyacrylic acids, wherein the composition comprises no more than 2.5 ppm unassociated dust having a maximum diameter less than or equal to 10 microns, and wherein the composition is characterized by a 60 minute 0.3 psi (21,000 dynes/cm.sup.2) Absorption under Load greater than 20 grams/gram.