Method for polymerizing pyrrolidone with preheating of catalyst

Details Method for polymerizing pyrrolidone with preheating of catalyst Method for polymerizing pyrrolidone with preheating of catalyst

1980-04-08

1982-08-17

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528325, 528326, C08G 6916, C08G 6924

Patent

active

043450652

ABSTRACT:
An improved, consistent quality anionic catalyst for polymerizing pyrrolidone, optionally mixed with up to 25% of another copolymerizable lactam, is disclosed in which an alkali metal pyrrolidonate, prepared by reacting an alkali metal hydroxide or alkoxide with a molar excess of pyrrolidone, is heated for at least 5 hours at 100.degree.-175.degree. C. in the absence of water and air. Reproduceable results are obtained when the catalyst so heated is used to polymerize pyrrolidone.

REFERENCES:
patent: 3721652 (1973-03-01), Barnes
patent: 3793258 (1974-02-01), Reinking et al.
patent: 3842047 (1974-10-01), Pusztaszeri

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