Process for preparing water-absorbing resins

Details Process for preparing water-absorbing resins Process for preparing water-absorbing resins

C - Chemistry, Metallurgy

08

F

402/451

C08F 220/06 (2006.01) C08J 3/03 (2006.01)

Patent

CA 1279436

Abstract of the Disclosure A hot aqueous solution is prepared first which com- prises acrylic acid neutralized 70 to 100 mole percent, a water-miscible or water-soluble polyvinyl monomer, water and, when desired, an organic solvent having a boiling point of 40 to 150° C, and which contains the acrylate monomer and the polyvinyl monomer in a combined concentration of 30 to 80 wt. %. To achieve the full advantage of the present invention, the acrylate and polyvinyl monomers are present in a combined concentration of less than 70 in weight percent of the monomer solution. In accordance with another important embodiment of the present invention, the combined concentration of the acrylate and polyvinyl monomers is less than 55 weight percent of the monomer solution.

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