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US 2021/0061982 A1Published application
Heterophasic propylene copolymer with low clte
AssigneeBorealis AG
InventorsGeorg Grestenberger, Daniela Mileva, Susanne Kahlen
Life of this patent
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Abstract
A heterophasic propylene copolymer (HECO) comprising a polypropylene matrix having a melt flow rate MFR2 (230° C.) in the range of 45 to 75 g/10 min for the preparation of molde articles with low CLTE.
Claims19
Heterophasic propylene copolymer (HECO) comprising:
- (a) a (semi)crystalline polypropylene (PP) having a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of 42 to 75 g/10 min;
- and
- (b) an elastomeric propylene copolymer (ESC) dispersed in said (semi)crystalline polypropylene (PP);
- wherein said heterophasic propylene copolymer (HECO) has:
- (i) a xylene cold soluble (XCS) fraction in the range of 25 to 38 wt. %;
- wherein further the xylene cold soluble (XCS) fraction of said heterophasic propylene copolymer (HECO) has:
- (ii) a comonomer content in the range of 30.0 to 65.0 mol %;
- and
- (iii) an intrinsic viscosity (IV) in the range of 1.70 to 2.30 dl/g.
6 more elements
Heterophasic propylene copolymer (HECO) comprising:
- (a) a (semi)crystalline polypropylene (PP);
- and
- (b) an elastomeric propylene copolymer (ESC) dispersed in said (semi)crystalline polypropylene (PP):
- wherein said heterophasic propylene copolymer (HECO) has:
- (i) a xylene cold soluble (XCS) fraction in the range of 25 to 38 wt. %;
- wherein further the xylene cold soluble (XCS) fraction of said heterophasic propylene copolymer (HECO) has:
- (ii) a comonomer content in the range of 30.0 to 65.0 mol %;
- and
- (iii) an intrinsic viscosity (IV) in the range of 1.70 to 2.30 dl/g;
- and wherein still further;
- (iv) the xylene cold insoluble (XCI) fraction of the heterophasic propylene copolymer (HECO) has an intrinsic viscosity (IV) in the range of 1.15 to 1.35 dl/g.
8 more elements
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19-21. (canceled)
Dependencies are inferred from the claim text.