ARAMID-POLYBUTADIENE-ACRYLONITRILE DIBLOCK COPOLYMER AND ITS PRODUCTION

PURPOSE:To obtain the subject diblock copolymer having high heat-resistance and excellent solubility in solvent, etc., by carrying out the polycondensation of a specific polybutadiene-acrylonitrile copolymer and an aramid in the presence of an aromatic phosphorous acid ester and a pyridine derivativ...

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Bibliographic Details
Main Author TAGAMI TOSHIO
Format Patent
LanguageEnglish
Published 07.05.1993
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To obtain the subject diblock copolymer having high heat-resistance and excellent solubility in solvent, etc., by carrying out the polycondensation of a specific polybutadiene-acrylonitrile copolymer and an aramid in the presence of an aromatic phosphorous acid ester and a pyridine derivative. CONSTITUTION:The objective copolymer is produced by carrying out the polycondensation of (A) a polybutadiene-acrylonitrile copolymer having a carboxyl group on one terminal, expressed by formula I [x>0; y>0; y/(x+y) is 0.10 to 0.27; (z) is 5-15] and having a number-average molecular weight of 1,000-5,000 and (B) an aramid having an aminoaryl group on one terminal and carboxyl group on the other terminal and expressed by formula II (Ar is bivalent aromatic group; (n) is 2-100) in the presence of (C) an aromatic phosphorous acid ester and a pyridine derivative.
Bibliography:Application Number: JP19910297775