Process for the production of polyester copolymers

Details Process for the production of polyester copolymers Process for the production of polyester copolymers

1983-05-06

1984-03-06

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528275, 528279, 528283, 528284, 528285, 5283083, C08G 6322

Patent

active

044355629

ABSTRACT:
The invention is a process for esterifying organic dicarboxylic acid and diol at elevated temperatures and thereafter transesterifying the esterification product in the presence of a diol and a diester at elevated temperatures thereafter polymerizing the transesterification product in a condensation stage to form a polycondensed copolyester having an intrinsic viscosity from 0.2 to 0.9.

REFERENCES:
patent: 3654233 (1972-04-01), Kosel et al.
patent: 3988301 (1974-10-01), Jeurissen et al.
patent: 4039515 (1977-08-01), Rebhan et al.
patent: 4046739 (1977-09-01), Lacona
patent: 4208527 (1980-06-01), Horlbeck et al.
patent: 4223124 (1980-09-01), Broughton et al.

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