Heterophasic polyolefin alloy

US6339123B1 · kind B1 · utility

Assignee

• Borealis AG · AT

Inventors

• Manfred Raetzsch · Kirchschlag, AT
• Norbert Reichelt · Ansfelden, AT
• Achim Hesse · Dresden, DE
• Hans-Gerhard Fritz · Uhingen, DE
• Uwe B{haeck over (o)}lz · Rochlitz, DE

Key dates

• Filing date: Jun 30, 1999
• Grant date: Jan 15, 2002
• Expiry date: Jun 30, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Heterophasic polyolefin alloys, with a semi-interpenetrating network structure and an outstanding combination of high stiffness, low temperature toughness and optionally a low coefficient of thermal expansion of propylene polymers and elastomers, are produced by melt compounding propylene polymers with a co-continuous blend, which contains 5 to 60% by weight of gel and was produced by reacting mixtures of propylene polymers and elastomeric polyolefins or styrene butadiene ethylene terpolymers with ethylenically unsaturated, hydrolyzable organosilane compounds in the presence of silanol condensation catalysts.Heterophasic polyolefin alloys are suitable for the production of films, sheets, fibers, panels, coatings, injection molded article, pipes, hollow objects and foams.