Process for producing partially hydrolyzed acrylamide polymer

Details Process for producing partially hydrolyzed acrylamide polymer Process for producing partially hydrolyzed acrylamide polymer

1984-04-02

1985-08-13

Lipman, Bernard

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

Synthetic resins

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

5253294, 525378, C08F 812

Patent

active

045351317

ABSTRACT:
Polyacrylamide in the form of aquagel is partially hydrolyzed in such a manner that small pieces of the aquagel are mixed with an alkali agent in a specified quantity and maintained at a temperature of 50.degree. to 95.degree. C. until the hydrolysis reaches substantial completion. The quantity of the alkali agent is that corresponding to 1/1.1 to 1/3 of the hydrolysis percentage desired of the final partially hydrolyzed polyacrylamide. The partially hydrolyzed polyacrylamide thus produced is characterized by uniform hydrolysis evidenced by its improved solubility in water and a pH around 7 of its aqueous solution. The term "aquagel" is herein used interchangeably with a term "hydrogel".

REFERENCES:
patent: 3905122 (1975-09-01), Ohshima et al.
patent: 4146690 (1979-03-01), Tago et al.
patent: 4192727 (1980-03-01), Ward

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