Elastic blends comprising crystalline polymer and crystallizable polymers of propylene - Patent US7202305(B2)

Filed: Dec 09, 2005

Published: Apr 10, 2007

Abstract

Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided comprising from about 35% to about 85% isotactic polypropylene and from about 30% to about 70% of an ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e.g., a single melting point.

Applicants

EXXONMOBIL CHEM PATENTS INC

Inventors

RAVISHANKAR PERIAGARAM
STACHOWSKI EDMUND J
DATTA SUDHIN
COZEWITH CHARLES

Application Number

11298146

Priority Claims

US10846798

Family Members

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Classification Codes

C08L23/14, C08L23/00, C08L23/10, C08L23/06, C08L23/04