Title:
CROSS-LINKED POLYMER COMPOSITION SWELLING IN WATER AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2000/009612
Kind Code:
A1
Abstract:
A novel cross-linked polymer composition swelling in water which is excellent in the rate and amount of brine absorption under pressure. The composition comprises a mixture of a particulate cross-linked polymer which swells in water and is basic in water and a particulate cross-linked polymer which swells in water and is acidic in water. When water is present among the particles of the two particulate polymers, the polymers are united with each other through ionic bonds formed by the neutralization of at least part of the acid groups of the particulate polymer which is acidic in water with the particulate polymer which is basic in water.
Inventors:
HARADA NOBUYUKI
SAKAMOTO SHIGERU
ADACHI YOSHIFUMI
KITAYAMA TOSHIMASA
SAKAMOTO SHIGERU
ADACHI YOSHIFUMI
KITAYAMA TOSHIMASA
Application Number:
PCT/JP1999/004334
Publication Date:
February 24, 2000
Filing Date:
August 10, 1999
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
A61L15/60; B01J20/02; B01J20/26; C08L101/14; (IPC1-7): C08L101/00; B01J20/26
Domestic Patent References:
| WO1996015162A1 | 1996-05-23 | |||
| WO1996015180A1 | 1996-05-23 | |||
| WO1996017681A1 | 1996-06-13 | |||
| WO1999034841A1 | 1999-07-15 |
Other References:
See also references of EP 1024176A4
Attorney, Agent or Firm:
Matsumoto, Takehiko (Hannan-cho 1-chome Abeno-ku Osaka-shi Osaka, JP)
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