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US 11,111,371 B2Granted
High flow automotive exterior compounds with excellent surface appearance
AssigneeBorealis AG
InventorsThomas Lummerstorfer, Daniela Mileva, Georg Grestenberger
Life of this patent
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Abstract
The present invention is directed to propylene composition applicable for high flow automotive exterior compounds with excellent surface appearance, said composition comprising a modified polypropylene composition and an inorganic filler.
Claims13
A composition comprising a modified polypropylene composition and an inorganic filler, wherein the modified polypropylene composition is obtained by treatment of a polypropylene composition with a peroxide (PO), the polypropylene composition comprising:
- (a) a heterophasic composition, comprising:
- (a1) a (semi)crystalline polypropylene, and
- (a2) an elastomeric ethylene/propylene copolymer dispersed in the (semi)crystalline polypropylene,
- (b) a plastomer being a copolymer of ethylene and at least one C4 to C20 α-olefin, and
- (c) optionally a high flow polypropylene, the high flow polypropylene having a higher melt flow rate MFR2 (230° C.), measured according to ISO 1133, than the (semi)crystalline polypropylene,
- wherein the modified polypropylene composition has:
- (i) a melt flow rate MFR2 (230° C.) measured according to ISO 1133 above 32 g/10 min, and
- (ii) an intrinsic viscosity determined according to DIN ISO 1628/1 (in Decalin at 135° C.) of the xylene soluble fraction below 2.30 dl/g and
- (iii) an intrinsic viscosity determined according to DIN ISO 1628/1 (in Decalin at 135° C.) of the xylene insoluble fraction below 1.05 dl/g.
6 more elements
An injection moulded automotive article comprising a composition comprising:
- a modified polypropylene composition and an inorganic filler, wherein the modified polypropylene composition is obtained by treatment of a polypropylene composition with a peroxide (PO), the polypropylene composition comprising:
- (a) a heterophasic composition, comprising:
- (a1) a (semi)crystalline polypropylene, and
- (a2) an elastomeric ethylene/propylene copolymer dispersed in the (semi)crystalline polypropylene,
- (b) a plastomer being a copolymer of ethylene and at least one C4 to C20 α-olefin, and
- (c) optionally a high flow polypropylene, the high flow polypropylene having a higher melt flow rate MFR2 (230° C.), measured according to ISO 1133, than the (semi)crystalline polypropylene,
- wherein the modified polypropylene composition has:
- (i) a melt flow rate MFR2 (230° C.) measured according to ISO 1133 above 32 g/10 min, and
- (ii) an intrinsic viscosity determined according to DIN ISO 1628/1 (in Decalin at 135° C.) of the xylene soluble fraction below 2.30 dl/g and
- (iii) an intrinsic viscosity determined according to DIN ISO 1628/1 (in Decalin at 135° C.) of the xylene insoluble fraction below 1.05 dl/g.
7 more elements
Dependencies are inferred from the claim text.