Water-absorbing agent and its production process and use

Details Water-absorbing agent and its production process and use Water-absorbing agent and its production process and use

1999-03-23

2000-08-15

Sanders, Kriellion

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 702

Patent

active

061037850

ABSTRACT:
The present invention provides: a water-absorbing agent which has high absorption capacity, fast absorption speed, and excellent liquid permeability; and a production process and a use for such a water-absorbing agent. A water-absorbent fine particle having a lower absorption capacity than a water-absorbent resin particle is fixed to the surface of the water-absorbent resin particle, or portions having a higher crosslinking density than internal portions are discontinuously present in the neighborhood of the surface of the water-absorbent resin particle. In addition, the water-absorbing agent is produced using a water-absorbent crosslinking agent which is swellable in itself.

REFERENCES:
patent: 4727097 (1988-02-01), Kobayashi et al.
patent: 5382610 (1995-01-01), Harada et al.
patent: 5422406 (1995-06-01), Yang et al.
patent: 5731365 (1998-03-01), Engelhardt et al.

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