Patent · US Expired

Heterophasic copolymers

US6723829B1 · kind B1 · utility

18Cited by

2References

9Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Bo Malm · Espoo, FI
Pirjo Jaaskelainen · Porvoo, FI
Torvald Vestberg · Porvoo, FI

Key dates

Filing date	Jun 10, 2002
Grant date	Apr 20, 2004
Priority date	—
Expiry date	Jun 10, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2810/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polypropylene heterophasic copolymers with good flow and impact properties are made by visbreaking a starting polypropylene heterophasic copolymer of which the amorphous rubber has an intrinsic viscosity of 2 dl/g or more and the ethylene content in the amorphous rubber, determined as C2 of AM, is from 20 wt-% to 45 wt-%.

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