Method for producing improved water-absorbent resins

Details Method for producing improved water-absorbent resins Method for producing improved water-absorbent resins

1985-02-04

1986-05-06

Michl, Paul R.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524430, 525374, 525387, C08J 712

Patent

active

045873089

ABSTRACT:
A method for easily, inexpensively and efficiently producing an improved water-absorbent resin having a high water absorbency and a high water absorption rate and capable of forming a gel having a high gel strength and nonstickiness, in which water-absorbent resin particles which contain water and a crosslinking agent and are in the semi-swollen state are agitated at an elevated temperature in the presence of an inert inorganic powder to conduct the crosslinking of the resin, while removing water, the water-absorbent resin containing a monomer units having a carboxyl group in the form of free acid or a metal salt.

REFERENCES:
patent: 3005802 (1961-10-01), Sellers
patent: 3554985 (1971-01-01), Fields
patent: 3740366 (1973-06-01), Sanderson
patent: 3966679 (1976-06-01), Gross
patent: 4056502 (1977-11-01), Gross
patent: 4061846 (1977-12-01), Gross

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