Document Type and Number:
Japanese Patent JPH0414684
Kind Code:
B2
Abstract:
A water absorbent crosslinked polymer having at least 70% by weight of acrylic acid monomeric units, 60 to 90% of the carboxyl groups of which are in the form of an alkali metal salt, produced by a method in which a mixture comprised of acrylic acid, 60 to 90% of the carboxyl groups of which are in the form of an alkali metal salt, and a fibrous cellulosic material is heated in the presence of a radical initiator. The polymerization temperature can be effectively controlled by smooth evaporation of water. The crosslinked polymer can absorb such a large amount of water as several hundred times the weight of the polymer in an excellent absorption rate, and finds applications as, for example, a disposable diaper and a sanitary napkin.
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Inventors:
SAOTOME KAZUO
Application Number:
JP669185A
Publication Date:
March 13, 1992
Filing Date:
January 19, 1985
Export Citation:
Assignee:
TAIYO FISHERY CO LTD
International Classes:
C08F251/00; C08F2/44; C08F20/06; C08F20/34; C08F120/04; C08F220/60; C08F251/02; D06M14/04