Process for the preparation of polybutylene terephthalate

Details Process for the preparation of polybutylene terephthalate Process for the preparation of polybutylene terephthalate

1982-04-16

1984-03-27

Morris, Theodore

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

Synthetic resins

From carboxylic acid or derivative thereof

528274, 528275, C08G 6334

Patent

active

044395973

ABSTRACT:
In the two stage reaction of terephthalic acid with 1,4-butanediol to produce polybutylene terephthalate in which acid and diol are first subjected to catalytic esterification/oligomerization and the resulting products are thereafter subjected to catalytic polycondensation, the co-production of tetrahydrofuran is significantly reduced by conducting the polycondensation reaction prior to completion of the esterification/oligomerization reaction.

REFERENCES:
patent: 4329444 (1982-05-01), Borman
patent: 4346213 (1982-08-01), Hall et al.

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