Polymerization of 2-pyrrolidone with alkali metal pyrrolidonates

Details Polymerization of 2-pyrrolidone with alkali metal pyrrolidonates Polymerization of 2-pyrrolidone with alkali metal pyrrolidonates

1979-05-17

1980-08-12

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

260 312N, 528312, 528315, 528319, 528326, C08G 6924

Patent

active

042174422

ABSTRACT:
There is disclosed the use of certain quaternary ammonium sulfates and bisulfates as polymerization accelerators in the polymerization of 2-pyrrolidone employing alkali metal pyrrolidonates as primary catalysts together with CO.sub.2, SO.sub.2 or MoO.sub.3 as activators. Methods for recycling both the unchanged monomer and the accelerator are disclosed.
The structural formula for the operable quaternary ammonium salts is: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl, aryl and aralkyl radicals, including mixtures thereof, and n is 1 or 2 depending on the valence of X, and X is a bisulfate or sulfate.
In addition to accelerating the rate of polymerization these substances also act as color suppressors when SO.sub.2 is used as the activator. For this purpose X in the above formula may also be a halide. Less than 0.01 mol per mol of alkali metal pyrrolidonate is needed in this use.
Cesium or rubidium pyrrolidonates are also disclosed as color suppressors when using SO.sub.2 as the activator.
A method of forming anhydrous solutions of quaternary ammonium salts in 2-pyrrolidone is also disclosed.

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
DieMakromolekure Chemie, 161, p. 64 (1972).

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