Preparation of insoluble polyvinylpyrrolidone

Details Preparation of insoluble polyvinylpyrrolidone Preparation of insoluble polyvinylpyrrolidone

1977-06-24

1979-02-13

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 23, 526 27, 526 46, 526 53, C08F 818, C08F 820

Patent

active

041396880

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.

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