Two stage procedure for the preparation of polypyrrolidone

Details Two stage procedure for the preparation of polypyrrolidone Two stage procedure for the preparation of polypyrrolidone

1980-01-18

1982-01-05

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528312, 528317, 526 65, C08G 6924

Patent

active

043095305

ABSTRACT:
Polypyrrolidone polymers and copolymers are obtained by polymerizing 2-pyrrolidone, optionally with another lactam, in the presence of a catalyst and accelerator, first in the mass until at least 10% of the monomer is converted but the reaction product is still capable of suspension, then completing the desired degree of polymerization by suspending the reaction mixture in an inert liquid dispersion agent that does not dissolve the desired polymer. Relatively high molecular weight polymers are prepared in a short amount of time using this two-stage procedure.

REFERENCES:
patent: 4017465 (1977-04-01), Bacskai

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