PROPYLENE/ETHYLENE BLOCK COPOLYMER COMPOSITION

PURPOSE: To provide a propylene/ethylene block copolymer composition which can give a molding excellent in transparency and gloss and also excellent in a balance between rigidity and impact resistance when used as a modifier for the properties of a polyolefin, compared with a conventional propylene/...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIKAGE ICHIRO, SUGIMOTO RYUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a propylene/ethylene block copolymer composition which can give a molding excellent in transparency and gloss and also excellent in a balance between rigidity and impact resistance when used as a modifier for the properties of a polyolefin, compared with a conventional propylene/ethylene block copolymer. CONSTITUTION: This propylene/ethylene block copolymer composition comprises 15-85 pts.wt. propylene/ethylene block copolymer and 85-15 pts.wt. crystalline polypropylene having an intrinsic viscosity lower than that of the propylene/ ethylene block copolymer and having a crosslinked structure with an intercrosslinkage molecular weight of 1000-300000, and has an overall haze of 40% or below and an internal haze of 20% or below as measured in the form of a 60μm-thick film.