Patent · US Active

Heterophasic polypropylene with excellent creep performance

US9096751B2 · kind B2 · utility

2Cited by

0References

15Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Michiel Bergstra · Berchem, BE
Pauli Leskinen · Porvoo, FI
Bo Malm · Espoo, FI
Cornelia Kock · Traun, AT

Key dates

Filing date	Mar 14, 2011
Grant date	Aug 4, 2015
Priority date	—
Expiry date	Jan 7, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/139
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Heterophasic propylene copolymer comprising (a) a matrix (M) being a polypropylene (PP), said polypropylene (PP) has a polydispersity index (PI) of at least 5.0, and (b) an elastomeric propylene copolymer (EC) dispersed in said matrix (M), wherein (i) said heterophasic propylene copolymer has a melt flow rate MFR2 (230° C.) of equal or below 1.0 g/10 min, (ii) the amorphous phase (AM) of the xylene cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity (IV) of at least 3.5 dl/g.

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