Process for the isolation of polyarylene esters

Details Process for the isolation of polyarylene esters Process for the isolation of polyarylene esters

1978-11-28

1980-07-15

Lee, Lester L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528176, 528179, 528486, 528491, 528493, 528495, C08G 6372, C08G 6374

Patent

active

042129516

ABSTRACT:
A process for the isolation of particulate polyarylene esters having good thermal stability and hydrolytic stability, which comprises adding to a solution of a polyarylene ester in an organic solvent a poor solvent for the polyarylene ester at least in an amount such that said solution reaches a cloud point, followed by subjecting said mixed solution to an aging treatment whereby the polyarylene ester precipitates as solids, characterized in that said poor solvent is a mixed poor solvent consisting of 5-95% by weight of an aliphatic alcohol with 1-5 carbons and the other poor solvent for the polyarylene ester, the amount of said mixed poor solvent added being within the range of 100-200% by weight of the amount such that said solution reaches the cloud point and not exceeding the amount of said solution.

REFERENCES:
patent: 3953401 (1976-04-01), Gabler et al.

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