High flow polyolefin composition with low shrinkage and clte
AssigneeBorealis AG
InventorsMarkus Gahleitner, Georg Grestenberger, Christelle Grein, Cornelia Kock
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Abstract
Polyolefin composition comprising (a) a heterophasic propylene copolymer comprising a polypropylene (PP) having a melt flow rate MFR2 (230° C.) of 30 to 350 g/10 min, and an elastomeric propylene copolymer (E) having an intrinsic viscosity (IV) in the range of 1.5 to 3.0 dl/g and (b) a polyethylene having a melt flow rate MFR2 (190° C.) of 15 to 100 g/10 min, wherein (i) the total polyolefin composition has a melt flow rate MFR2 (230° C.) of more than 15 to 200 g/10 min, and (ii) the weight ratio of elastomeric propylene copolymer to the polyethylene is below 2.0.
Claims14
Polyolefin composition (PO) comprising:
- (a) a heterophasic propylene copolymer (HECO) comprising:
- (a1) a polypropylene (PP) having a melt flow rate MFR2 (230° C.) of 30 to 350 g/10 min, and
- (a2) an elastomeric propylene copolymer (E) having an intrinsic viscosity (IV) in the range of 1.5 to 3.0 dl/g measured as the intrinsic viscosity (IV) of the xylene cold soluble (XCS) fraction of the heterophasic propylene copolymer (HECO), and
- (b) a polyethylene (PE) having a melt flow rate MFR2 (190° C.) of 20 to 80 g/10 min, wherein,
- (i) the total polyolefin composition (PO) has a melt flow rate MFR2 (230° C.) of more than 15 to 200 g/10 min, and
- (ii) the weight ratio of elastomeric propylene copolymer (E) to the polyethylene (PE) is below 2.0.
Dependencies are inferred from the claim text.