Superabsorbent polymer having improved absorption rate and absor

Details Superabsorbent polymer having improved absorption rate and absor Superabsorbent polymer having improved absorption rate and absor

1995-05-18

1995-10-31

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 54, 521 64, 521149, 604358, 604369, C08J 9232, C08J 9236

Patent

active

054629721

ABSTRACT:
A carboxylic containing superabsorbent polymer having a swell rate of at least 0.3 g./g.sec., a gel strength of about 40,000 to about 150,000 dynes/cm.sup.2, a centrifuge capacity at 30 minutes of about 20 to about 50 g/g, an absorption permeability under pressure at 60 minutes of at least 5 g/g at wherein the ratio of the absorption permeability under pressure at 15 minutes is at least 25% of the absorption permeability under pressure at 60 minutes is disclosed. The superabsorbent polymer is prepared from a solution of carboxylic containing monomers, a cross linking agent, and a blowing agent. The polymer is subsequently treated with a surface crosslinking agent.

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