POLYPROPYLENE COMPOSITION AND PREPARATION THEREOF

PROBLEM TO BE SOLVED: To provide a polypropylene composition comprising a crystalline ethylene/propylene copolymer component and a crystalline polypropylene component, which is suitable as a base resin for polypropylene molded products having an excellent transparency, rigidity, heat resistance, imp...

Full description

Saved in:
Bibliographic Details
Main Authors YASUDA YOSHITOYO, FUJITA HIROYUKI, SAITO JUN, OKI YOSHIYUKI, ADACHI MINORU
Format Patent
LanguageEnglish
Published 26.09.2000
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a polypropylene composition comprising a crystalline ethylene/propylene copolymer component and a crystalline polypropylene component, which is suitable as a base resin for polypropylene molded products having an excellent transparency, rigidity, heat resistance, impact resistance, etc., and showing no surface stickiness. SOLUTION: The titled composition comprises 5 to 95 wt.% crystalline propylene polymer(PP) component containing 90 mol% or more propylene-derived polymer units wherein 0.05 mol% or more 2,1- and 1,3-bonds are present in the propylene polymer unit, and 95 to 5 wt.% crystalline ethylene/propylene copolymer(EP) component comprising ethylene and propylene which contains 70 to 95 mol% ethylene-derived polymer units. A polypropylene composition is prepared through a two-step polymerization process utilizing a metallocene- supporting solid catalyst suitable for preparing crystalline propylene polymers.
Bibliography:Application Number: JP19990071892