Preparation of superabsorbent polymers

Details Preparation of superabsorbent polymers Preparation of superabsorbent polymers

2008-06-26

2009-11-03

Johnson, Edward M (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Miscellaneous

C502S404000

Reexamination Certificate

active

07612016

ABSTRACT:
The invention describes superabsorbent polymers composed of surface-post crosslinked polycarboxypolysaccharides having excellent age-stable absorption properties, even under load, high attrition resistance and biodegradability and their use for absorbing water, aqueous or serous fluids and also blood. Also disclosed is a method of making which is impervious to changes in raw material quality and which provides consistent product quality.

REFERENCES:
patent: 2639239 (1953-05-01), Elliott
patent: 3247171 (1966-04-01), Walker et al.
patent: 3589364 (1971-06-01), Dean et al.
patent: 4043952 (1977-08-01), Ganslaw et al.
patent: 4051086 (1977-09-01), Reid
patent: RE31323 (1983-07-01), Marder et al.
patent: 4640810 (1987-02-01), Laursen et al.
patent: 4689408 (1987-08-01), Gelman et al.
patent: RE32649 (1988-04-01), Brandt et al.
patent: 4952550 (1990-08-01), Wallach et al.
patent: 4959341 (1990-09-01), Wallach
patent: 5247072 (1993-09-01), Ning et al.
patent: 5247964 (1993-09-01), DeLange
patent: 5252340 (1993-10-01), Honeycutt
patent: 5470964 (1995-11-01), Qin
patent: 5532350 (1996-07-01), Cottrell et al.
patent: 5550189 (1996-08-01), Qin et al.
patent: 5669894 (1997-09-01), Goldman et al.
patent: 5807116 (1998-09-01), Kitatani et al.
patent: 5811531 (1998-09-01), Iguchi et al.
patent: 42 06 857 (1992-03-01), None
patent: 44 18 319 (1994-05-01), None
patent: 195 05 709 (1995-02-01), None
patent: 196 54 745 (1996-12-01), None
patent: 197 50 890 (1997-11-01), None
patent: 198 07 501 (1998-02-01), None
patent: 198 07 504 (1998-02-01), None
patent: 199 09 653 (1999-03-01), None
patent: 0 538 904 (1993-04-01), None
patent: 0 538 904 (1993-04-01), None
patent: 0 566 118 (1993-10-01), None
patent: 0 614 914 (1994-09-01), None
patent: 0 637 594 (1995-02-01), None
patent: 0637 594 (1995-02-01), None
patent: 0 855 405 (1998-01-01), None
patent: 0 850 615 (1998-07-01), None
patent: 1041109 (2000-10-01), None
patent: 6 3037143 (1988-02-01), None
patent: 3 285919 (1991-12-01), None
patent: H06-154596 (1994-06-01), None
patent: 9 087956 (1997-03-01), None
patent: H09-504331 (1997-04-01), None
patent: 2000-345031 (2000-12-01), None
patent: 2001 114803 (2001-04-01), None
patent: WO 95/11925 (1995-05-01), None
patent: WO 99/49905 (1999-10-01), None
Sibel Sungur, “Investigation on Drug Release Systems Using CMC Crosslinked with Ferric Ions”, Art Cells, Blood Subs., And Immob. Biotech, (1999) 27 (3). 279-290.
Dictionary by Laborlawtalk, Internet website: http://dictionary.laborlawtalk.com/room—temperature.
Prof. Dr. Jurgen Falbe and Prof. Dr. Manfred Regitz, Rompp Chemie Lexikon “Normalbedinguingen”, article, copyright 1991, p. 3048, Georg Thleme Verlag Stuttgart, New York.
English translation of the International Preliminary Examination Report for PCT/EP02/05799.

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