Water-absorbent crosslinked polymers

Details Water-absorbent crosslinked polymers Water-absorbent crosslinked polymers

2006-03-03

2010-06-08

Mullis, Jeffrey C (Department: 1796)

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

Synthetic resins

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

C525S329700, C526S240000

Reexamination Certificate

active

07732528

ABSTRACT:
Water-absorbent crosslinked polymers bearing acid groups, some or all of the acid groups being present as carboxylate groups having at least two different types of cations as counterions, processes for their preparation and mixtures of water-absorbent crosslinked polymers.

REFERENCES:
patent: 6605673 (2003-08-01), Mertens et al.
patent: 2004/0176557 (2004-09-01), Mertens et al.
patent: WO 00/53644 (2000-09-01), None
patent: WO-02/20068 (2002-03-01), None
patent: WO-2004/096127 (2004-11-01), None
International Search Report in PCT/EP2006/060414 dated May 12, 2006.

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