The Dow Chemical Company

Thomas C Johnson

Herbert A Gartner

Andrew T Graham

Fredric L Buchholz

Jonathan H Siddall

Stephen B Christensen

Josef H Burgert

Water absorbent resin particles of crosslinked carboxyl containing

The subject invention pertains to a water-swellable polymer comprising the polymerization product of an .alpha.,.beta.-ethylenically unsaturated monomer in an aqueous phase, initiator, crosslinking agent, and polyvinyl alcohol, the polymerization product having been heated at a temperature greater than about 160.degree. C., wherein the polyvinyl alcohol is less than about 98 percent hydrolyzed, such that the polymerization product has improved whiteness.

Water-swellable polymers having improved color

This invention provides an improved process for producing a superabsorbent polymer with reduced residual monomer content which comprises partially drying a crosslinked, partially neutralized polymer gel, then raising the temperature of the gel using microwaves or RF radiation in the absence of circulating air and thereafter completing the drying.

Process for producing a superabsorbent polymer

A process for the preparation of an absorbent polymeric composition is disclosed. The process involves the polymerization of an aqueous solution of carboxylic acid monomers in a neutralized or partially neutralized form in the presence of a dispersing agent which aids in the even dispersion of the crosslinking agent. The polymers prepared exhibit high absorptive capacities and low water-soluble polymer content.

Crosslinker stabilizer for preparing absorbent polymers

Growing community of inventors

Midland, MI, United States of America

Thomas C Johnson