Process for the preparation of neopentyl glycol polyesters and c

Details Process for the preparation of neopentyl glycol polyesters and c Process for the preparation of neopentyl glycol polyesters and c

1980-02-15

1982-07-06

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528274, 560 76, 560 98, 560127, C08G 6322

Patent

active

043384315

ABSTRACT:
The present invention relates to an improved process for the preparation of neopentyl glycol polyesters by reacting neopentyl glycol with carboxylic acids or derivatives thereof in the presence of minor amounts of glycols which boil at lower temperatures than neopentyl glycol. These low-boiling glycols obviate previous difficulties relating to the sublimation of neopentyl glycol. Thus, the present process offers safety advantages since neopentyl glycol does not crystallize in the reaction apparatus and also provides better control over the molecular ratio of acid groups to alcohol groups.

REFERENCES:
patent: 3055869 (1962-09-01), Wilson et al.
patent: 3330789 (1967-07-01), Aylesworth et al.
patent: 4101422 (1978-07-01), Lamont et al.
patent: 4148764 (1979-04-01), Lamont et al.
patent: 4152512 (1979-05-01), Downs

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