WATER ABSORBER AND PRODUCTION THEREOF - NIPPON CATALYTIC CHEM IND

Title:

WATER ABSORBER AND PRODUCTION THEREOF

Document Type and Number:

Japanese Patent JPH06370

Kind Code:

A

Abstract:

PURPOSE: To provide a novel water absorber controlled in water absorbing speed and having excellent gel elasticity and its production method.

CONSTITUTION: The water absorber whose water absorbing speed is 20-90sec at the time of absorbing 28g/(absorber g) physiological saline and in which the swollen hydrogel obtained in this way is free from the penetration of a steel ball at the time of freely falling the steel ball from 20cm height on the swollen hydrogel is provided. The water absorber is obtained by adding to mix 1-10 pts.wt. a polycation compound having ≥5000 molecular weight into 100 pts.wt. a cross-linked polymer particle having ≤149μm particle diameter and 15-75wt.% acidic group. As a result, the secondary and tertiary absorbing speed is kept higher after applying a load at the time of using the water absorber for a loaded application because the swollen hydrogel has high repulsion.

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Inventors:

HARADA NOBUYUKI
WADA KATSUYUKI
SHIMOMURA TADAO

Application Number:

JP15974592A

Publication Date:

January 11, 1994

Filing Date:

June 18, 1992

Export Citation:

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Assignee:

NIPPON CATALYTIC CHEM IND

International Classes:

B01J20/26; A61F13/00; C08L33/02; C08L101/14; (IPC1-7): B01J20/26

Attorney, Agent or Firm:

Mikio Hatta (1 outside)

Next Patent: RESIN COMPOSITION EXCELLENT IN ENDOTOXIN ADSORBING PROPERTY