Process for the production of aromatic polyesters

Details Process for the production of aromatic polyesters Process for the production of aromatic polyesters

1989-01-03

1990-05-08

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528194, 525437, 525448, C08G 6300, C08G 6700, C08G 6900

Patent

active

049239570

ABSTRACT:
Aromatic polyesters based on diphenols and iso- and/or terephthalic acid are produced by transesterification of esters of the diphenols with the aromatic dicarboxylic acids in the melt by first reacting the aromatic dicarboxylic acids with a stoichiometric excess of the diphenol esters to form oligomers and then condensing the resulting oligomers to the aromatic polyesters with elimination and removal by distillation of diphenol ester.

REFERENCES:
patent: 4127560 (1978-11-01), Kramer
patent: 4330668 (1982-05-01), Hideo et al.

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