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Title:
PRODUCTION OF ALPHA-ANILINONITRONE DERIVATIVE AND POLYESTER WITH LOW CONTENT OF TERMINAL CARBOXYL GROUP
Document Type and Number:
Japanese Patent JPH0987242
Kind Code:
A
Abstract:

To produce an α-anilinonitrone derivative effective in reducing terminal carboxyl groups in a polyester, excellent in hydrolytic resistance and useful for papermaking canvases, tire cords, fabrics, etc., for medical use.

This anilinonitrone derivative is represented by formula I (R2, R12, R3, R13, R4 and R5 are each a 1-7C alkyl; R6, R16, R7, R8, R18, R9, R19, R10, and R11 are each a 1-16C alkyl or H), e.g. α-3,5-di-t-butylanilino-N-3,5-di-t- dutylphenylnitrone. The derivative represented by formula I is obtained as a by-product of carbodiimide by reacting an alkyl-substituted phenyl isocyanate in an aromatic hydrocarbon solvent in the presence of a phosphorus catalyst for synthesizing the carbodiimide. A polyester with a low content of terminal carboxyl groups is prepared by bringing at least one α-anilinonitrone derivative selected from compounds represented by formulas I and II into contact with the polyester containing the terminal carboxyl group.


Inventors:
Minamisono, Kunio
Mita, Toshihiro
Application Number:
JP1995000243414
Publication Date:
March 31, 1997
Filing Date:
September 21, 1995
Export Citation:
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Assignee:
TEIJIN LTD
International Classes:
C07C291/04; C08G63/91; C08K5/29; C08L67/00; (IPC1-7): C07C291/04; C08G63/91; C08K5/29; C08L67/00
Attorney, Agent or Firm:
大島 正孝