Patent · US Expired

Process for the preparation of a polypropylene molding composition

US4576994A · kind A · utility

18Cited by

2References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Bernhard Dorrer · Frankfurt am Main, DE
Helmut Strametz

Key dates

Filing date	Aug 31, 1984
Grant date	Mar 18, 1986
Priority date	—
Expiry date	Aug 31, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2308/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polypropylene molding composition with a good hardness and good impact strength at low temperatures is formed by two-stage polymerization of propylene and ethylene in liquid propylene in the presence of a special supported catalyst.

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