Process for producing aromatic liquid crystal polyester

Details Process for producing aromatic liquid crystal polyester Process for producing aromatic liquid crystal polyester

2005-03-15

2005-03-15

Boykin, Terressa M. (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S176000, C528S190000, C528S193000, C528S272000

Reexamination Certificate

active

06867280

ABSTRACT:
A process for producing an aromatic liquid crystal polyester comprising reacting an aromatic diol, an aromatic hydroxycarboxylic acid, or an aromatic diol and aromatic hydroxycarboxylic acid with an aromatic dicarboxylic acid in the presence of a fatty anhydride having carbon atoms of 4 or less and a fatty anhydride having carbon atoms of over 4.

REFERENCES:
patent: 63-245435 (1988-10-01), None
patent: 2-311526 (1990-12-01), None
patent: 0790067 (1995-04-01), None

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