Polymerization process for the preparation of poly(butylene tere

Details Polymerization process for the preparation of poly(butylene tere Polymerization process for the preparation of poly(butylene tere

1987-12-18

1989-04-25

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528279, 528308, 5283086, C08G 6340

Patent

active

048249300

ABSTRACT:
A process is disclosed for the preparation of polymeric butanediol ester of terephthalic acid by means of ester interchange process having improved rates of polymerization to produce polyesters having improved color. The process employs the neat addition of terephthalic acid on completion of the ester interchange reaction and maintains the ratio of glycol to dimethyl terephthalate in the ratio of not more than 1.3 to 1. Preferably the process is conducted with titanium containing catalysts and has a polymerization rate greater than 700 deciliters per hour.

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patent: 4499261 (1985-02-01), Heinze et al.
patent: 4654413 (1987-03-01), Takahashi

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