Polymerization of 2-pyrrolidone with quaternary ammonium acceler

Details Polymerization of 2-pyrrolidone with quaternary ammonium acceler Polymerization of 2-pyrrolidone with quaternary ammonium acceler

1979-10-15

1981-01-27

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526 69, 526 71, 528315, 528326, 528492, 528496, 528499, C08G 6924

Patent

active

042476836

ABSTRACT:
A method of recovering and recycling quaternary ammonium accelerators for the polymerization of 2-pyrrolidone is disclosed. The method consists of removing the quaternary ammonium compound together with unpolymerized 2-pyrrolidone by washing the polymer with a solvent for both, such as water or methanol, neutralizing the solution immediately after washing and then removing the solvent at a sufficiently low temperature so that the quaternary ammonium compound is not decomposed.

REFERENCES:
patent: 2638463 (1953-05-01), Ney et al.
patent: 2809958 (1957-10-01), Barnes et al.
patent: 2973343 (1961-02-01), Ney
patent: 3060153 (1962-10-01), Follett
patent: 3069392 (1962-12-01), Clark et al.
patent: 3174951 (1965-03-01), Taber
patent: 3721652 (1970-09-01), Barnes
patent: 3835100 (1974-09-01), Sekiguchi et al.
patent: 4098774 (1978-07-01), Bacskai
Die Makromolekulare Chemie., 161, p. 64, (1972).

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