Preparation of aromatic polyesters by direct self-condensation o

Details Preparation of aromatic polyesters by direct self-condensation o Preparation of aromatic polyesters by direct self-condensation o

1982-03-08

1983-07-12

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528180, 528181, 528190, 528206, C08G 6310

Patent

active

043931910

ABSTRACT:
Provided is a method for preparing melt-processable polyesters efficiently via the direct polymerization of aromatic hydroxy acids. By the direct polymerization method, hydroxy and acid moieties are reacted directly without the use of acetylated reactants, thereby avoiding the disadvantages inherent in the case of acetylated reactants. The direct polymerization is conducted in the presence of a catalyst comprising a metal selected from the group consisting of the Group IV and V metals.

REFERENCES:
patent: 4161470 (1979-07-01), Calundann
patent: 4256624 (1981-03-01), Calundann
patent: 4318841 (1982-03-01), East et al.
patent: 4318842 (1982-03-01), East et al.
patent: 4337190 (1982-06-01), Calundann

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