Process for producing polyester

Details Process for producing polyester Process for producing polyester

1975-09-03

1980-12-16

Hoke, V. P.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528220, 528295, 528308, C08G 17013

Patent

active

042398827

ABSTRACT:
A polyester is produced in an improved process by esterification or interesterification of an aromatic dicarboxylic acid or an alkyl ester thereof with 1,4-butanediol followed by polycondensation of the resulting ester characterized in reusing the 1,4-dibutanediol mixture distilled in the polycondensation step without purification as a starting material for production of more polyester.

REFERENCES:
patent: 3644294 (1972-02-01), Siclari et al.
patent: 3940367 (1976-02-01), Pelousek et al.

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