PRODUCTION OF MODIFIED POLYPROPYLENE COMPOSITION

PURPOSE:To obtain a modified polypropylene freed from foaming due to moisture during molding and having good adhesion to polar substances, by heat-treating a specified modified polypropylene and blending the heat-treated polypropylene with a propylene oxide polymer. CONSTITUTION:A mixture consisting...

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Bibliographic Details
Main Authors FUJIYAMA MITSUYOSHI, WACHI HIROSHI, KURAMOTO NAOHIKO
Format Patent
LanguageEnglish
Published 11.06.1982
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To obtain a modified polypropylene freed from foaming due to moisture during molding and having good adhesion to polar substances, by heat-treating a specified modified polypropylene and blending the heat-treated polypropylene with a propylene oxide polymer. CONSTITUTION:A mixture consisting of polypropylene, an unsaturated carboxylic acid or its derivative and an organic peroxide is melt-blended. The resulting modified polypropylene is heat-treated at a temperature >=60 deg.C, pref., >=100 deg.C, and 90-50pts.wt. this modified polypropylene is blended with 10-50pts.wt. propylene oxide polymer. As the unsaturated carboxylic acid which can be used, maleic anhydride is most suitable. The heating time for heat treatment is generally about 10min-10hr and preferably this heat treatment is carried out so that the modified polypropylene is devolatilized by heating to an unreacted monomer content <=0.05mol%.
Bibliography:Application Number: JP19800169132