Tiger stripe modifier

US9388304B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Michael Tranninger · Traun, AT
• Georg Grestenberger · Steyr, AT
• Martina Sandholzer · Linz, AT
• Simon Schwarzengerger · Linz, AT
• Susanne Kahlen · Leonding, AT
• Gregory Potter · Linz, AT

Key dates

• Filing date: Nov 28, 2013
• Grant date: Jul 12, 2016
• Expiry date: Nov 28, 2033

Classification

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

Abstract

Tiger stripe modifier being a heterophasic polypropylene composition having a melt flow rate MFR2 (230° C.) in the range of 0.5 to 20 g/10 min and comprises a propylene homopolymer and an elastomeric propylene copolymer, wherein said propylene homopolymer has a melt flow rate MFR2 (230° C.) in the range of above 10 to 300 g/10 min; the xylene cold soluble fraction of the heterophasic polypropylene composition has an intrinsic viscosity in the range of more than 2.5 to below 11.0 dl/g; and the comonomer content of the xylene cold soluble fraction of the heterophasic polypropylene composition is in the range of 10.0 to 25.0 wt.-%; wherein further the heterophasic polypropylene composition fulfills the inequation (I) 0.3≧(0.241×C)-(1.14×IV) (I) wherein C is the comonomer content of the xylene cold soluble (XCS) fraction of the heterophasic polypropylene composition (HECO1), and IV is the intrinsic viscosity of the xylene cold soluble (XCS) fraction of the heterophasic polypropylene composition (HECO1).