Water absorbent crosslinked polymer and a method of producing th

Details Water absorbent crosslinked polymer and a method of producing th Water absorbent crosslinked polymer and a method of producing th

1986-01-16

1987-03-03

Lilling, Herbert J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524 13, 524832, 527314, C08L 108, C08F25102, C08F12006

Patent

active

046476172

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 cross-linked 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.

REFERENCES:
patent: 3682856 (1972-08-01), Adams et al.
patent: 3953386 (1976-04-01), Murphy et al.
patent: 4093776 (1978-06-01), Aoki et al.
patent: 4135943 (1979-01-01), Morishita et al.
patent: 4541871 (1985-09-01), Obayashi et al.
Derwent Abst. 80-56019C/32 Japan Nippon Jun. 25, 1980 J55084304.

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