Phosphonium catalyst system for the polymerization of 2-pyrrolid

Details Phosphonium catalyst system for the polymerization of 2-pyrrolid Phosphonium catalyst system for the polymerization of 2-pyrrolid

1976-09-20

1978-07-11

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

252428, 252429R, 252431N, 2603265A, 2603265FL, 2603265FN, 528326, C08G 6924, B01J 2304

Patent

active

041001460

ABSTRACT:
The process of making a catalyst for the polymerization of 2-pyrrolidone by contacting a phosphonium halide, an alkali metal pyrrolidonate and carbon dioxide in a mol ratio of about 1:0.1-2:0.1-0.5 and the polymerization of 2-pyrrolidone with said catalyst. The alkali metal pyrrolidonate may be prepared by reacting an alkali metal hydroxide with 2-pyrrolidone. The polymerization of 2-pyrrolidone in the presence of this catalyst system produces poly-2-pyrrolidone of high molecular weight.

REFERENCES:
patent: 3721652 (1973-03-01), Barnes

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