Process for preparing a color-improved thermoplastic polyarylate

Details Process for preparing a color-improved thermoplastic polyarylate Process for preparing a color-improved thermoplastic polyarylate

1990-05-16

1992-01-07

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528272, C08F 800, C08L 6700, C08G 6300, C08G 6900

Patent

active

050793357

ABSTRACT:
Described herein is an improved process for preparing an ester derivative of a dihydric phenol by reacting the dihydric phenol with an acid anhydride wherein the improvement comprises carrying out the reaction in the presence of a particular adsorbent. Also described herein is a method of treating an ester derivative of a dihydric phenol with a particular adsorbent.

REFERENCES:
patent: 4978739 (1990-12-01), Amone et al.

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