Absorbent and method for production of absorbent resin

Details Absorbent and method for production of absorbent resin Absorbent and method for production of absorbent resin

1997-02-20

1999-02-02

McCamish, Marion

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

Synthetic resins

Treating polymer containing material or treating a solid...

528485, 528499, 524430, 524431, 524437, 524450, 521 43, 521 45, C08F 610

Patent

active

058666788

ABSTRACT:
A method for the production of an absorbent resin having a very small residual monomer content either by adding to an absorbent resin powder a substance capable of reacting with the residual monomer in the absorbent resin powder thereby forming an absorbent resin composition having a water content in the range of 10 to 70% by weight and heat-treating the absorbent resin composition at a temperature in the range of 100.degree. to 200 .degree. C. while retaining the water content of the absorbent resin or by adding to an absorbent resin powder a substance capable of reacting with the residual monomer in the absorbent resin powder thereby forming an absorbent resin composition having a water content in the range of 25 to 55% by weight, heat-treating the absorbent resin composition at a temperature in the range of 120.degree. to 200 .degree. C. while retaining the water content of the absorbent resin composition in the range mentioned above, and then drying the absorbent resin composition at a temperature not exceeding 120.degree. C.

REFERENCES:
patent: 4585808 (1986-04-01), Reilly
patent: 4766173 (1988-08-01), Bailey et al.
patent: 4929717 (1990-05-01), Chmelir
patent: 5229488 (1993-07-01), Nagasuna et al.

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