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Title:
PRODUCTION OF COPOLYESTER
Document Type and Number:
Japanese Patent JPH04309520
Kind Code:
A
Abstract:
PURPOSE:To produce a copolyester improved in strengths, breaking strength, heat resistance, etc., by reacting two specified compounds with a dicarboxylic acid and acetic anhydride and polycondensing the reaction product in a molten state. CONSTITUTION:A compound of formula I is made to react with a dicarboxylic acid of formula II and compounds of formulas III and/or IV and acetic anhydride, and the product is polycondensed at 280 deg.C or below in a molten state to obtain a liquid crystal copolyester comprising dicarboxylic acid units of formula V (wherein R<1> is a 6-18C bivalent aromatic hydrocarbon group), diol units of the formula: OCH2CH2O, and oxybenzoic acid units of formula V1.

Inventors:
KIDAI OSAMU
SHIRAHAMA RIE
HONMA MASARU
Application Number:
JP7336591A
Publication Date:
November 02, 1992
Filing Date:
April 05, 1991
Export Citation:
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Assignee:
MITSUBISHI CHEM IND
International Classes:
C08G63/60; C09K19/38; (IPC1-7): C08G63/60; C09K19/38
Attorney, Agent or Firm:
Hasegawa Soji



 
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