Crosslinkable polyolefin composition comprising silane groups forming an acid or a base upon hydrolysation

US8846844B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Kristian Dahlen · Stora Höga, SE
• Roger Carlsson · Skattkärr, SE

Key dates

• Filing date: May 14, 2010
• Grant date: Sep 30, 2014
• Expiry date: May 14, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a polyolefin composition comprising (A) a crosslinkable polyolefin with hydrolysable silane groups which upon hydrolysation form an acid or a base, characterised in that the acid or base generates a gel content of at least 40% after 40 hours in the 90° C. cross-linking test, wherein the acid or base is added in an amount of 4.5 mmol/kg to an ethylene/vinyltrimethoxysilane copolymer with a MFR2=2 g/10 min, a density of 923 g/cm3, and 2 wt. % of vinyltrimethoxysilane and then is cross-linked in a waterbath at 90° C., and to a polyolefin composition comprising (i) a crosslinkable polyolefin with hydrolysable silane groups, and (ii) a non-polymeric compound with hydrolysable silane groups which upon hydrolysation form an acid or a base, characterised in that the acid or base generates a gel content of at least 40% after 40 hours in the 90° C. cross-linking test, wherein the acid or base is added in an amount of 4.5 mmol/kg to an ethylene/vinyltrimethoxysilane copolymer with a MFR2=2 g/10 min, a density of 923 g/cm3, and 2 wt. % of vinyltrimethoxysilane and then is cross-linked in a waterbath at 90° C.