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US 12,577,389 B2Granted
Thermoplastic moulding materials with improved property profile
AssigneeClariant International Ltd.
InventorsJeremia Schwabe, Erik Hauck, Felix Kirschvink, Sebastijan Bach, Gabriele Stiehl, Robert Turner, Torsten Lindner, Christian Neu
Life of this patent
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Abstract
The invention relates to thermoplastic moulding materials comprising styrene block copolymers and propylene-based copolymers, wherein the SBC polymers comprise a styrene content of 5 to 40% by weight and the backbone of the propylene copolymers has a weight-average molecular weight Mw<10 000 g/mol. The thermoplastic moulding materials are suitable for affixing granules due to their melt viscosity and their mechanical properties.
Claims18
A thermoplastic moulding material comprising
- (a) from 20 to 45% by weight, based on the total mass of the thermoplastic moulding, of one or more styrene block copolymers, wherein the one or more styrene block copolymers have a styrene content of from 5 to 40% by weight, based on the total mass of the one or more styrene block copolymers;
- and
- (b) from 20 to 75%, by weight, based on the total mass of the thermoplastic moulding, of one or more propylene-based polymers comprising a propylene-based polymer backbone, wherein the propylene-based polymer backbone is a linear propylene-based polymer having a weight-average molecular weight Mw of less than 10,000 g/mol, and wherein the one or more propylene-based polymers have a melting enthalpy, measured in accordance with ISO 11357-2, of below 50 J/g and a melt viscosity at 170° C., measured in accordance with DIN 53019, of from 1 to 1000 mPa·s.
Dependencies are inferred from the claim text.