Patent · US Active

Heterophasic propylene copolymer with excellent impact/stiffness balance

US9416262B2 · kind B2 · utility

4Cited by

1References

16Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Cornelia Kock · Traun, AT
Petar Doshev · Linz, AT
Elisabeth Potter · Pasching, AT
Guenter Gsellmann · Linz, AT
Pauli Leskinen · Porvoo, FI

Key dates

Filing date	Aug 1, 2011
Grant date	Aug 16, 2016
Priority date	—
Expiry date	Jun 5, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2314/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Heterophasic propylene copolymer comprising —a matrix (M) being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate MFR2 (230° C.) and at least one of the three polypropylene fractions has a melt flow rate MFR2 (230° C.) in the range of 1.0 to 15.0 g/10 min, and —an elastomeric propylene copolymer dispersed in said matrix, wherein —the heterophasic propylene copolymer has a melt flow rate MFR2 (230° C.) of equal or more than 20.0 g/10 min, and —the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.