Low EFO polypropylene composition

US10358546B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Jingbo Wang · Linz, AT
• Claudia Kniesel · Linz, AT
• Petar Doshev · Linz, AT
• Floran Prades · Linz, AT

Key dates

• Filing date: Jul 27, 2016
• Grant date: Jul 23, 2019
• Expiry date: Jul 27, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2308/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polymer composition comprising at least one polypropylene homopolymer and/or random copolymer, up to 15 wt % of at least one polyethylene, optionally at least one elastomer in an amount of 8 to 40 wt % and optionally fillers and/or additives in an amount of up to 45 wt % based on the total weight of the final polymer composition with the at least one polyethylene having a density of higher than 940 kg/m3, a content of hexane hot extractables of below 0.80 wt % preferably below 0.60 wt %, most preferably below 0.40 wt % and a copolymer/homopolymer (COHO) ratio measured by Temperature Rising Elution Fraction (TREF) up to 6%.