Polypropylene compositions with low fogging

US10781304B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Jingbo Wang · Linz, AT
• Claudia Kniesel · Linz, AT
• Minna Aarnio-Winterhof · Orth an der Donau, AT
• Karlheinz Friedrich · Weiden am See, AT
• Friedrich Berger · Linz, AT

Key dates

• Filing date: Jun 20, 2017
• Grant date: Sep 22, 2020
• Expiry date: Jul 30, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2314/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polypropylene composition comprising (A) 60 to 95 wt % of a heterophasic polypropylene (HECO) comprising 10 to 30 wt % of dispersed phase with the dispersed phase having a comonomer content of 30 to 45 wt % and the HECO having a melt flow rate MFRPP in the range of 12 to 200 g/10 min and being prepared in the presence of a Ziegler Natta catalyst (ZN-C), (B) 0 to 15 wt % of one or more elastomers, (C) 5 to 20 wt % of at least one filler wherein the polypropylene composition fulfils inequation (1) fogging≤0.02 MFRComp+0.3. The composition allows for a well-balanced combination of a good impact/stiffness balance, a good scratch resistance, low VOC and FOG emissions and remarkable good fogging values.