Process for preparation of copolyester

Details Process for preparation of copolyester Process for preparation of copolyester

1987-09-22

1988-08-30

Phynes, Lucille M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525437, 528272, 528176, 528302, C08G 6302

Patent

active

047678305

ABSTRACT:
The invention process comprises reacting a polyester with a hydroxy-aromatic carboxylic ester to effect the transesterification and then further polymerizing the product. The process is conducted so that the obtained product has a high molecular weight and does not contain impurities, without corrosion of a used reactor.

REFERENCES:
patent: 3778410 (1973-12-01), Kuhfuss et al.
patent: 3975487 (1976-08-01), Cottis et al.
patent: 4184996 (1980-01-01), Calundann
patent: 4621126 (1986-11-01), Yoshimura et al.

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