Patent · US Expired

Ternary thermoplastic molding composition containing ethylene-propylene copolymer

US4319001A · kind A · utility

2Cited by

2References

8Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Paul Spielau · Troisdorf, DE
Werner Kuhnel · Uttenreuth, DE
Dietmar Welsch · Weißenburg, DE
Gerd Klingberg · Lohmar, DE
Hans E. Konermann · Troisdorf, DE
Wilfried Leeder · Troisdorf, DE

Key dates

Filing date	Mar 31, 1981
Grant date	Mar 9, 1982
Priority date	—
Expiry date	Mar 31, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/03
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A ternary molding composition is formed of an admixture of a modified ethylene-propylene copolymer, a propylene polymer and polyethylene and contains 35-50% by weight of a modified ethylene-propylene copolymer, which is prepared by the polymerization of an ethylene-propylene copolymer onto polyethylene, with the ethylene content of the ethylene-propylene copolymer being at least 65% by weight and the modified copolymer having a melt index MFI (230/5) of 0.8-2.0 g/10 min; 30-60% by weight of polypropylene with a melt index MFI (230/5) of 25-65 g/10 min and/or propylene-ethylene copolymer with a melt index MFI (230/5) of 15-50 g/10 min, and 3-30% by weight of polyethylene, wherein the polyethylene block of the modified ethylene-propylene copolymer can be attributable to the quantity of polyethylene contained in said composition.

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