Preparation of a polyvinylpyrrolidone by heat treatment of an aq

Details Preparation of a polyvinylpyrrolidone by heat treatment of an aq Preparation of a polyvinylpyrrolidone by heat treatment of an aq

1980-10-16

1982-05-18

Jiles, Henry R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524808, C08L 3906

Patent

active

043304516

ABSTRACT:
A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.

REFERENCES:
patent: 2658045 (1953-11-01), Schildknecht
patent: 2734894 (1956-02-01), Vaughan
patent: 3350366 (1967-10-01), Merijan
patent: 3437647 (1969-04-01), Freifeld
patent: 4006283 (1977-02-01), MacKenzie, Jr. et al.

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