Patent · US Active

Propylene polymer composition having superior hexane extractables/impact balance

US8901259B2 · kind B2 · utility

1Cited by

1References

8Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Klaus Bernreiter · Linz, AT
Petar Doshev · Linz, AT
Gregory Potter · Linz, AT
Martina Sandholzer · Linz, AT

Key dates

Filing date	Jun 15, 2011
Grant date	Dec 2, 2014
Priority date	—
Expiry date	Jun 15, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D123/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Heterophasic polypropylene copolymers having an MFR (2.16 kg, 230° C.) of 15 to 200 g/10 min, determined according to ISO 1133 comprising a propylene homo- or copolymer matrix with an MFR (2.16 kg, 230° C.) of 80 to 500 g/10 min, determined according to ISO 1133 (A) and an ethylene or C4-C10-alpha-olefin propylene rubber phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction soluble in p-xylene at 25° C. (XCS), having an intrinsic viscosity of 2.85 to 4.00 dl/g, determined according to DIN EN ISO 1628-1 and -3 and being composed of propylene monomer units in an amount of 70 wt % to 90 wt %, with optimum balance of impact resistance and low amount of hexane extractables; a process for their preparation and their use.

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