Anionic copolymerization of 2-pyrrolidone with caprolactam or pi

Details Anionic copolymerization of 2-pyrrolidone with caprolactam or pi Anionic copolymerization of 2-pyrrolidone with caprolactam or pi

1977-04-25

1978-07-18

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

252428, 252431C, 252431N, 252437, 528322, 528313, 2603265A, C08G 6924

Patent

active

041015312

ABSTRACT:
Copolymers of 2-pyrrolidone and C.sub.5 -C.sub.6 lactams (caprolactam and piperidone) are provided in solid form, at relatively high rates and molecular weights by polymerization in the presence of alkaline catalysts and carbon dioxide, by the inclusion of an auxiliary catalyst and a copolymerization promoter comprising certain onium salts and N-acyl lactams, respectively.

REFERENCES:
patent: 3017393 (1962-01-01), Ney
patent: 3492275 (1970-01-01), Bigot et al.
patent: 3575937 (1971-04-01), Bigot et al.
patent: 3793258 (1974-02-01), Reinking et al.
patent: 3875121 (1975-04-01), Brassat et al.
Chemical Abstracts, vol. 58, 1963, 1801c, Volokhina et al.
Journal of Polymer Science: Part A, vol. 1, pp. 111-123 (1963), Kobayashi et al.
Journal of Polymer Science: Part A-1, vol. 5, pp. 965-974 (1967), Bar-Zakay et al.

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