Devolatilization

Details Devolatilization Devolatilization

1996-03-28

1997-11-25

Acquah, Samuel A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528481, 528483, 528492, 528497, 528498, 528502, C08F 600

Patent

active

056914458

ABSTRACT:
A polymer melt may be devolatilized to less than 500, preferably less than 150 ppm of residual volatile material by injecting into the melt an amount of a super critical fluid greater than the amount of residual volatile material in the melt, typically not more than about 10 weight %, and passing the melt through a flash chamber devolatilizer at a pressure of 12 mm of Hg or less at a temperature of from 200.degree. to 350.degree. C.

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patent: 5380822 (1995-01-01), Skilbeck

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