Water assisted devolatilization

Details Water assisted devolatilization Water assisted devolatilization

1993-05-27

1995-01-10

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528481, 528501, C08F 610

Patent

active

053808223

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 water 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 8 mm of Hg or less at a temperature of from 200.degree. to 350.degree. C.

REFERENCES:
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patent: 3660535 (1972-05-01), Finch et al.
patent: 3773740 (1973-11-01), Szabo
patent: 3903202 (1975-09-01), Carter et al.
patent: 4195169 (1980-03-01), Priddy
patent: 4934433 (1990-06-01), Aboul-Nasr
patent: 5069750 (1991-12-01), Aboul-Nasr
patent: 5102591 (1992-04-01), Hasson et al.
patent: 5118388 (1992-06-01), Aboul-Nasr
patent: 5145728 (1992-09-01), Itaba et al.

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