Patent ID: 9663648
Date: 2017-05-30
CPC Classifications: B29C,B29K,C08L

Claim:
1. A modified heterophasic copolymer polypropylene for the preparation of thermoformed articles, obtained by modification via reactive extrusion of a polypropylene comprising from 0% to 6% of a comonomer in the synthesis thereof, a rubber phase comprising propene and at least one alpha-olefin or ethene comonomer at a ratio of 3 to 70% by weight and having 3 to 18 carbons, wherein the modified heterophasic copolymer polypropylene comprises from 0.3 to 2 long-chain branches per 1,000 carbon atoms, a MFR greater than 1.5 g/10 min, a melt strength of between 12 cN and 40 cN at 190°, an extensibility greater than 11 cms/s and an impact strength higher than 100 J/m at room temperature, characterized in that comonomers selected from the group consisting of aminosilanes, silanes or alpha-beta unsaturated acids can be added in the modification step.