Method for the reduction of impurities in polyester resins

Details Method for the reduction of impurities in polyester resins Method for the reduction of impurities in polyester resins

1988-12-27

1991-09-17

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

5283082, 5283084, 5283085, 528483, 528500, 525437, C08G 6389

Patent

active

050496476

ABSTRACT:
A method for purifying polyethyleneterephthalate reins by contacting the resins with an atmosphere containing carbon dioxide under supercritical conditions.

REFERENCES:
patent: 4223128 (1980-09-01), Halek et al.
patent: 4591629 (1986-05-01), El-Ghatta et al.
patent: 4703105 (1987-10-01), Allada

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