Superabsorbent polymers and process for producing

Details Superabsorbent polymers and process for producing Superabsorbent polymers and process for producing

C - Chemistry, Metallurgy

08

F

C08F 6/00 (2006.01) A61L 15/60 (2006.01)

Patent

CA 2116035

2116035 9305080 PCTABS00020 Superabsorbent polymers of .alpha.,.beta.-ethylenically unsaturated monomers are made by polymerizing said monomers with certain crosslinking agents, drying the polymer and heating the dried polymer at, e.g., about 165 ·C to about 230 ·C, for a time sufficient to produce a heat-treated polymer having a sixty minute absorbency under a 0.3 psi load of at least about 25 grams/gram. Particularly preferred superabsorbent polymers incorporate a crosslinking agent methylenebisacrylamide, bis(acrylamido)acetic acid and its salts, allyl acrylate, allylmethacrylate and difunctional monovinyl and monoallyl esters and amides, and when heat-treated provide a polymer having a sixty minute absorbency under a 0.3 psi load of at least about 30 grams/gram.

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