IMPACT MODIFIER FOR THERMOPLASTIC POLYOLEFIN RESIN

PROBLEM TO BE SOLVED: To obtain an impact modifier which is the most suitable for imparting impact resistance by mixing an ethylene/propylene random copolymer with a low-density or very low-density random copolymer of ethylene with an α-olefin having the specified number of carbon atoms in a specifi...

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Bibliographic Details
Main Authors KAY PETER J, YU THOMAS C, OUHADI TRAZOLLAH
Format Patent
LanguageEnglish
Published 05.03.1999
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PROBLEM TO BE SOLVED: To obtain an impact modifier which is the most suitable for imparting impact resistance by mixing an ethylene/propylene random copolymer with a low-density or very low-density random copolymer of ethylene with an α-olefin having the specified number of carbon atoms in a specified ratio. SOLUTION: The ethylene/propylene random copolymer (A) used has a density of 0.850-0.900 g/cm and contains a nonconjugated diene containing 5-20 carbon atoms. The ethylene/4-20C α-olefin random copolymer (B) used has a density of 0.860-0.925 g/cm and a melt flow index of 0.2-30 dg/min and contains 5 wt.% 4-20C α-olefin (e.g. 1-butene) and a nonconjugated diene containing 5-20 carbon atoms. The mixing ratio A/B is (5-95) wt.%/(95-5 wt.%). The modifier is added in an amount of 4-60 wt.% based on a polypropylene composition containing selective additives.
Bibliography:Application Number: JP19980181479