Mischung von Propylenpolymeren, Verfahren zu ihrer Herstellung und Polypropylenzusammensetzung

A propylene polymer blend is disclosed which comprises (A) a propylene- alpha -olefin random copolymer with a propylene content of 90 to 99% by weight and (B) a propylene- alpha -olefin random copolymer with a propylene content of 55 to 90% by weight, wherein the intrinsic viscosity (Ä eta BÜ) of th...

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Bibliographic Details
Main Authors OKAYAMA, CHIKASHI, AKITAYA, SHINICHI, SUMI, YOSHITAKA, NAKASHIMA, TAKANORI
Format Patent
LanguageGerman
Published 05.04.2007
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A propylene polymer blend is disclosed which comprises (A) a propylene- alpha -olefin random copolymer with a propylene content of 90 to 99% by weight and (B) a propylene- alpha -olefin random copolymer with a propylene content of 55 to 90% by weight, wherein the intrinsic viscosity (Ä eta BÜ) of the copolymer B ranges from 1.3 to 3.5 dl/g, the ratio (Ä eta BÜ/Ä eta AÜ) of the intrinsic viscosity (Ä eta BÜ) of the copolymer B to the intrinsic viscosity (Ä eta AÜ) of the copolymer A ranges from 0.5 to 1.3 and a product ((Ä eta BÜ/Ä eta AÜ) x (WA/WB)) of the intrinsic ratio (Ä eta BÜ/Ä eta AÜ) of both copolymers and the weight ratio (WA/WB) of both copolymers ranges from 1.0 to 4.5. A polypropylene resin composition comprises 99 to 99.9999% by weight of the propylene polymer blend and 1 to 0.0001% by weight of an alpha -crystal nucleating agent.
Bibliography:Application Number: DE19986000610T