ELASTIC FILMS INCLUDING CRYSTALLINE POLYMER AND CRYSTALLIZABLE POLYMERS OF PROPYLENE

Improved thermoplastic polymer elastic film blend compositions including a crystalline isotactic polypropylene component and a crystallizable alpha- olefin and propylene copolymer component, the copolymer having crystallizabl e alpha-olefin sequences. In a preferred embodiment, improved thermoplasti...

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Bibliographic Details
Main Authors DATTA, SUDHIN, MIDDLESWORTH, JEFFREY A
Format Patent
LanguageEnglish
French
Published 23.11.2000
Edition7
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:Improved thermoplastic polymer elastic film blend compositions including a crystalline isotactic polypropylene component and a crystallizable alpha- olefin and propylene copolymer component, the copolymer having crystallizabl e alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided made up of from 0 % to 95 %, preferably 2 % to 4 0 weight % of the crystalline isotactic polypropylene and from 5 % to 100 %, preferably 60 % to 98 weight % of a crystallizable ethylene and propylene copolymer, wherein the copolymer has isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, and improved resistance to elastic deformation of the crystalline isotactic polypropylene and from of a crystallizable ethylene and propylene copolymer.
Bibliography:Application Number: CA20002372284