Method of producing polyesters

Details Method of producing polyesters Method of producing polyesters

1978-03-10

1979-05-08

Danison, Walter C.

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

Synthetic resins

From carboxylic acid or derivative thereof

528279, 528309, C08G 6338, C08G 6334

Patent

active

041537815

ABSTRACT:
New method of manufacturing polyesters and copolyesters having a base of aromatic diacids and condensation diols having at least 3 carbon atoms.
This method, carried out in the presence of an organic titanium derivative, by transesterification between an alkyl ester of the aromatic diacid and the diol, and then polycondensation, is characterized by the addition, during the polycondensation stage, of 0.001 to 1% by weight of a nonvolatile amine, based on the weight of polymer.
The polymers obtained may be transformed into threads, fibers, films or molded objects.

REFERENCES:
patent: 3475379 (1969-10-01), Hilaire
patent: 3523923 (1970-08-01), Smith et al.
patent: 3565864 (1971-02-01), Girantet
patent: 3644293 (1972-02-01), Fielder
patent: 3651014 (1972-03-01), Witsiepe

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