Title:
PRODUCTION OF AROMATIC POLYESTER
Document Type and Number:
Japanese Patent JP3181758
Kind Code:
B2
Abstract:
PURPOSE: To obtain an aromatic polymer having excellent hue using a phosphorus compound as a stabilizer by reacting a specific dicarboxylic acid component with a diol component in molten state under heating in the presence of a diaryl carbonate using an ester interchange catalyst, etc.
CONSTITUTION: This aromatic polymer is produced by reacting (A) a dicarboxylic acid component containing 20-95mol% of 2,6- naphthalenedicarboxylic acid with (B) a dial compound of formula I [A1 and A2 are phenylene; X is 1,1-cycloalkylidene, etc., of formula II (R1 and R2 are H, halogen, 1-6C alkyl, etc.) or formula III ((q) is 4-10)] [e.g. 2,2-bis(4- hydroxyphenyl)propane] and (C) a diaryl carbonate (preferably diphenyl carbonate) at molar ratios expressed by formula IV and formula V in the presence of an ester interchange catalyst free from alkali metal and a catalyst consisting of lithium carbonate in molten state a 320-400°C and adding 0.001-1.0mol% of a phosphorus compound to the reactional product as a stabilizer.
Inventors:
Takanori Miyoshi
Nobuaki Kido
Shunichi Matsumura
Nobuaki Kido
Shunichi Matsumura
Application Number:
JP13330993A
Publication Date:
July 03, 2001
Filing Date:
June 03, 1993
Export Citation:
Assignee:
Teijin Limited
International Classes:
C08G63/189; C08G63/19; C08G63/64; C08G63/78; C08L67/00; C08L67/03; C08L69/00; (IPC1-7): C08G63/78
Domestic Patent References:
| JP368626A |
Attorney, Agent or Firm:
Sumihiro Maeda