Postcrosslinking of water-absorbing polymers

Details Postcrosslinking of water-absorbing polymers Postcrosslinking of water-absorbing polymers

2011-07-19

2011-07-19

Rabago, Roberto (Department: 1762)

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

Synthetic resins

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

C525S329700, C525S329900, C525S330100, C525S360000, C525S367000, C525S371000, C525S374000, C525S375000, C525S379000, C525S382000, C525S383000, C525S384000

Reexamination Certificate

active

07981969

ABSTRACT:
The invention concerns a process for producing water-absorbing polymer, which comprises a base polymer A being mixed with a first aqueous solution B of at least one surface postcrosslinker and a second aqueous solution C of at least one polyvalent cation and thermally treated, wherein said base polymer A is based on at least 50% neutralized acid-functional monomer and said solutions B and C are metered wholly or partly concurrently through separate nozzles whereby a water-absorbing polymer having a high saline flow conductivity value is obtained.

REFERENCES:
patent: 4666983 (1987-05-01), Tsubakimoto et al.
patent: 5331059 (1994-07-01), Engelhardt et al.
patent: 5385983 (1995-01-01), Graham
patent: 5599335 (1997-02-01), Goldman et al.
patent: 6239230 (2001-05-01), Eckert et al.
patent: 6472478 (2002-10-01), Funk et al.
patent: 6503979 (2003-01-01), Funk et al.
patent: 6559239 (2003-05-01), Riegel et al.
patent: 6602950 (2003-08-01), Dentler et al.
patent: 6605673 (2003-08-01), Mertens et al.
patent: 6620889 (2003-09-01), Mertens et al.
patent: 6657015 (2003-12-01), Riegel et al.
patent: 6831142 (2004-12-01), Mertens et al.
patent: 2002/0128618 (2002-09-01), Frenz et al.
patent: 2002/0165288 (2002-11-01), Frenz et al.
patent: 2004/0231065 (2004-11-01), Daniel et al.
patent: 2004/0265387 (2004-12-01), Hermeling et al.
patent: 2426514 (2003-03-01), None
patent: 19807992 (1999-07-01), None
patent: 19807502 (1999-09-01), None
patent: 19846412 (2000-04-01), None
patent: 19854573 (2000-05-01), None
patent: 19854574 (2000-05-01), None
patent: 083022 (1983-07-01), None
patent: 372981 (1990-06-01), None
patent: 530438 (1993-03-01), None
patent: 543303 (1993-05-01), None
patent: 1165631 (2002-01-01), None
patent: 1169372 (2002-01-01), None
patent: 1516884 (2005-03-01), None
patent: WO 02/20068 (2002-03-01), None
patent: WO 02/22717 (2002-03-01), None
patent: WO 03/031482 (2003-04-01), None
International Search Report in PCT/EP2005/001673, dated Jun. 15, 2005.

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