Wholly aromatic polyester carbonate and process therefor

Details Wholly aromatic polyester carbonate and process therefor Wholly aromatic polyester carbonate and process therefor

2005-02-22

2005-02-22

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C264S176100, C264S219000, C528S271000, C528S277000, C528S279000, C528S280000, C528S281000, C528S282000, C528S283000

Reexamination Certificate

active

06858701

ABSTRACT:
A wholly aromatic polyester carbonate having a good color and excellent heat resistant stability. This polymer had an extremely low alkali metal content of 10 ppm or less. This polymer is advantageously produced by reacting an aromatic dicarboxylic acid, aromatic diol and diaryl carbonate in a specific molar ratio in the presence of a pyridine-based compound as a catalyst.

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