Preparation of insoluble polyvinylpyrrolidone

Details Preparation of insoluble polyvinylpyrrolidone Preparation of insoluble polyvinylpyrrolidone

1978-08-23

1979-12-25

Hamrock, William F.

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

Synthetic resins

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

525336, 525340, 525354, 525383, C08F 818, C08F 820

Patent

active

041806336

ABSTRACT:
Insoluble cross-linked homopolymers of vinylpyrrolidone or copolymers of vinylpyrrolidone are prepared by reaction of the soluble homopolymer or copolymer with certain acid chlorides at a temperature between 75.degree. C. and about 140.degree. C., to obtain a precipitate. Alternately, the insoluble product may be prepared by heating a partial amide chloride of a homopolymer or copolymer of vinylpyrrolidone.

REFERENCES:
patent: 2212786 (1939-08-01), McQueen
patent: 3314909 (1967-04-01), Whitfield et al.
patent: 3910862 (1975-10-01), Barabas et al.
patent: 4139688 (1979-02-01), Dixon

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