Process for the preparation of modified polybutylene terephthalate resin

The present invention provides a process for the preparation of a polyester from an acid component comprising terephthalic acid or a lower alcohol ester thereof as a main component and a diol component comprising 1,4-butanediol as a main component, wherein 0.001 to 0.5 mol % (based on the acid compo...

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Bibliographic Details
Main Authors NAKANE, TOSHIO, HIJIKATA, KENJI, KAWAGUCHI, KUNIAKI
Format Patent
LanguageEnglish
French
German
Published 25.10.1995
Edition6
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
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Summary:The present invention provides a process for the preparation of a polyester from an acid component comprising terephthalic acid or a lower alcohol ester thereof as a main component and a diol component comprising 1,4-butanediol as a main component, wherein 0.001 to 0.5 mol % (based on the acid component) of a specific aromatic sulfonic acid compound is dissolved in the diol component or a mixture of the diol component with the acid component and thereafter a catalyst is added to the resulting reaction system to conduct esterification (or transesterification) and polycondensation successively, for the purpose of providing a modified polybutylene terephthalate resin which little generates gas such as tetrahydrofuran even in high-temperature service and little gives sublimate in melting.
Bibliography:Application Number: EP19940302851