Process for manufacturing an improved acrylonitrile polymer melt

Details Process for manufacturing an improved acrylonitrile polymer melt Process for manufacturing an improved acrylonitrile polymer melt

1996-04-24

1997-10-07

Weber, Thomas R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528500, C08F 610

Patent

active

056749759

ABSTRACT:
Saturated or superheated steam, or an inert gas, or a combination thereof is introduced into a gas phase above a molten acrylonitrile polymer in a vessel having a stirrer, while the polymer has a temperature of at least 120.degree. C. and a pressure at least equal to its autogenous pressure. Any unreacted acrylonitrile monomer, or both any such monomer and any acrylonitrile monomer or water used as a plasticizer are removed by evaporation from the vessel.

REFERENCES:
patent: 3847885 (1974-11-01), Peeso, Jr.
patent: 3940405 (1976-02-01), Serad
patent: 4238441 (1980-12-01), Cramer
patent: 4461739 (1984-07-01), Young et al.
patent: 5314990 (1994-05-01), Jansen et al.
American Cyanamide Co., LU No. 69307, 1974, pp. 38-39 and claims.

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