Process for preparing water-soluble, partially-hydrolyzed, solid

Details Process for preparing water-soluble, partially-hydrolyzed, solid Process for preparing water-soluble, partially-hydrolyzed, solid

1983-03-23

1984-11-13

Schofer, Joseph L.

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

Synthetic resins

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

5253294, C08F 812

Patent

active

044826826

ABSTRACT:
A partially-hydrolyzed, solid acrylamide polymer is prepared by bringing a hydrous gel of a water-soluble acrylamide polymer into contact with an aqueous caustic alkali solution, maintaining the polymer at an elevated temperature and under highly humid conditions to hydrolyze certain amido groups of the water-soluble acrylamide polymer and then drying the thus partially-hydrolyzed acrylamide polymer. The resultant polymer contains less water-insoluble components and hardly forms precipitate even in salt water containing calcium ions. It can be suitably used for coagulation of suspension and in secondary oil recovery.

REFERENCES:
patent: 3784597 (1974-01-01), Fujimoto et al.

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