Absorbent resin composition and process for producing same

Details Absorbent resin composition and process for producing same Absorbent resin composition and process for producing same

1980-04-07

1981-08-25

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

128284, 128285, 260 296H, 260 296TA, 260 4229, 428402, 428407, 526 62, 526210, 528481, 528503, C08F 218

Patent

active

042860822

ABSTRACT:
An absorbent resin composition obtained by copolymerizing in an aqueous solution a mixture of 100 parts by weight of an acrylate salt monomer (B) composed of 0 to 50 mol % of acrylic acid and 50 to 100 mol % of an alkali metal acrylate and 0.001 to 5 part by weight of a crosslinkable monomer (C) having 2 to 4 groups selected from the group consisting of CH.sub.2 .dbd.CHCO--, CH.sub.2 .dbd.C(CH.sub.3)C0-- and CH.sub.2 .dbd.CH-CH.sub.2 -- in the molecule in the presence of at least one surface-active agent (A) selected from the group consisting of water-soluble surface-active agents and water-dispersible surface-active agents in the presence of a water-soluble radical polymerization initiator while maintaining the initial concentration of said mixture in the range of from 25% by weight to saturation, and then drying the resulting gel-like hydrous polymer under heat; and an absorbent resin composition obtained by pulverizing said absorbent resin composition to form a resin powder, and blending said resin powder with 0.01 to 10 parts by weight, per 100 parts by weight of said resin powder, of ultra-microscopic silica having a specific surface area, measured by the Brunauer-Emmett-Teller method, of at least 50 m.sup.2 /g and a particle diameter of not more than about 0.05 micron: and a process for producing the same.

REFERENCES:
patent: 4041020 (1977-08-01), Gross
patent: 4093776 (1978-06-01), Aoki et al.

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