Isolation of aromatic polyester copolymers

Details Isolation of aromatic polyester copolymers Isolation of aromatic polyester copolymers

1976-12-03

1979-09-04

Lee, Lester L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528194, C08G 6318, C08G 6370, C08G 6372, C08G 6374

Patent

active

041668995

ABSTRACT:
A method for the isolation of aromatic polyesters of a uniform and fine powder which comprises mixing a 1,2-dichloroethane solution containing 8 to 50% by weight of an aromatic polyester copolymer with 0.01 to 1.0 time by volume (based on said solution) of methanol, and isolating the resulting precipitates, said 1,2-dichloroethane solution containing an aromatic polyester copolymer being produced by contacting an aqueous alkaline solution of 2,2-bis(4'-hydroxyphenyl)propane with a 1,2-dichloroethane solution of a mixture of terephthaloyl chloride and isophthaloyl chloride.

REFERENCES:
patent: 3133898 (1964-05-01), Keck
patent: 3351624 (1967-11-01), Conix
patent: 3449295 (1969-06-01), Conix
patent: 3933713 (1976-01-01), Sokolov et al.
patent: 3939117 (1976-02-01), Ueno

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