(METH)ACRYLIC ACID SALT RESIN SOLUTION, HIGHLY WATER-ABSORBENT COMPOSITE MATERIAL, PRODUCTION THEREOF, AND PRODUCTION OF HIGHLY WATER-ABSORBENT FABRIC

Japanese Patent JP3650506

B2

PROBLEM TO BE SOLVED: To provide a (meth)acrylic acid salt resin soln. which can form a highly water-absorbent resin layer hardly falling off from a substrate by abrasion, impact, etc., by partly neutralizing the carboxyl groups of a monomer component contg. (meth)acrylic acid and polymerizing the neutralized monomer component in the presence of polyvinyl alcohol.
SOLUTION: 10-95% of the carboxyl groups of a monomer component contg. (meth)acrylic acid and other copolymerizable monomers (e.g. acrylamide) are neutralized with a basic compd. (e.g. KOH). The neutralized monomer component is mixed with 0.1-20 wt.% (based on the component) partly saponified polyvinyl alcohol having a degree of polymn. of 200-3,000. The resultant mixture in an amt. of 100 pts.wt. is subjected to polymn. in the presence of 50-400 pts.wt. water-soluble org. solvent and a polymn. initiator to give a soln. of a (meth) acrylic acid salt resin having a mol.wt. of 8,000-400,000. Then, a thermally reactive crosslinker (e g. a polyol polyglycidyl ether) in an amt. of 0.01-10 wt.% of the solid content of the soln. is added to it and is reacted with it to give a highly water-absorbent resin.

Amako Naotake
Koichi Ikegami

JP9724397A

May 18, 2005

April 15, 1997

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Mutual Chemical Industry Co., Ltd.

A01G1/00; C08F2/44; C08F8/00; C08F8/44; C08F220/06; C08F261/04; D06M13/02; D06M13/11; D06M14/14; D06M15/27; D21H19/20; (IPC1-7): C08F220/06; C08F2/44; C08F8/44; C08F261/04; D06M14/14; D06M15/27

JP62270607A

Keisei Nishikawa
Atsuo Mori

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