Thermoplastic polyesters containing biphenylene linkages

Details Thermoplastic polyesters containing biphenylene linkages Thermoplastic polyesters containing biphenylene linkages

1991-08-01

1992-08-11

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528279, 528302, 528305, 528307, 528308, 528373, 528391, 428 357, 428364, C08G 6320

Patent

active

051380226

ABSTRACT:
Aliphatic polyesters of 3,4'-biphenyldicarboxylic acid and optionally 4,4'-biphenyldicarboxylic acid are prepared by contacting at least one aliphatic diol having from 2 to 12 carbon atoms with a lower alkyl diester or phenolic diester of 3,4'-biphenyldicarboxylic acid and, optionally, a lower alkyl diester or phenolic diester of 4,4'-biphenyldicarboxylic acid, in the presence of a catalyst at about 180.degree. to about 300.degree. C. These polyesters are suitable for use in making fibers, films, three dimensional molded articles, barrier containers and coatings.

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