Devolatilization

Details Devolatilization Devolatilization

C - Chemistry, Metallurgy

08

F

C08F 6/10 (2006.01) C08F 6/00 (2006.01) C08F 6/28 (2006.01)

Patent

CA 2198295

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 1.6 x 10 3 Pascals (Pa) (12 mm of Hg) or less at a temperature of from 200°C to 350°C.

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