Process for improving a water absorbent polyacrylic acid polymer

Details Process for improving a water absorbent polyacrylic acid polymer Process for improving a water absorbent polyacrylic acid polymer

1987-06-03

1988-11-08

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525387, C08F 800

Patent

active

047835109

ABSTRACT:
A process for improving a water absorbent polyacrylic acid polymer in which the polymer is contacted with an aqueous solution containing a water soluble peroxide radical initiator, followed by heating, thereby causing substantially only the surface portion of the polymer to undergo crosslinking with the radical initiator while leaving the remaining core portion of the polymer substantially intact. The improved water absorbent polyacrylic acid polymer is excellent in both water absorbency and water absorption rate, and the hydrogel resulting from absorption of water has a pleasant, non-sticky feel. The improved water absorbent polyacrylic acid polymer can be advantageously utilized to produce a desirable disposable diaper, sanitary napkin, surgical pad, surgical sheet, paper towel or the like.

REFERENCES:
patent: 3418066 (1968-12-01), Caldwell et al.
patent: 4225650 (1980-09-01), van Brederode et al.

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