Borealis Ag

Cornelia Kock

Petar Emilov Doshev

Christelle Grein

Pauli Leskinen

Georg Grestenberger

Markus Gahleitner

Katja Ellen Klimke

Bo Malm

Floran Prades

Michael Tranninger

Elisabeth Potter

Anh Tuan Tran

Antti Tynys

Michiel Bergstra

Tonja Schedenig

Susana Filipe

David Friel

Martin Obadal

Guenter Gsellmann

Tua Sundholm

Polypropylene composition having a melt flow rate MFR(230&#xb0; C.) of equal or above 15 g/10 min comprising: (a) a crystalline polypropylene matrix; (b) an elastomeric propylene copolymer phase having a propylene content in the range of 40 to 80 wt.-%, and an intrinsic viscosity in the range of more than 0.7 to less or equal 2.5 dl/g; (c) a first polyethylene having a density in the range 905 to 925 kg/m3 and melt flow rate MFR(190&#xb0; C.) of below 30 g/10 min; (d) a second polyethylene having a density of above 915 kg/m, and a melt flow rate MFR(190&#xb0; C.) of equal or above 30 g/10 min.

High flow and stiff polymer material with good transparency and impact properties

The invention relates to a novel polyolefin composition having a low coefficient of thermal expansion (CLTE) and having a reduced occurrence of flow marks. The novel polyolefin compositions comprise a heterophasic polypropylene composition, ethylene/1-butene elastomer and an inorganic filler.

Polyolefins composition with low CLTE and reduced occurrence of flow marks

Polyolefin composition comprising (a) a heterophasic propylene copolymer comprising a polypropylene (PP) having a melt flow rate MFR(230&#xb0; 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 MFR(190&#xb0; C.) of 15 to 100 g/10 min, wherein (i) the total polyolefin composition has a melt flow rate MFR(230&#xb0; 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.

High flow polyolefin composition with low shrinkage and CLTE

Heterophasic propylene copolymer comprising &#x2014;a matrix (M) being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate MFR(230&#xb0; C.) and at least one of the three polypropylene fractions has a melt flow rate MFR(230&#xb0; C.) in the range of 1.0 to 15.0 g/10 min, and &#x2014;an elastomeric propylene copolymer dispersed in said matrix, wherein &#x2014;the heterophasic propylene copolymer has a melt flow rate MFR(230&#xb0; C.) of equal or more than 20.0 g/10 min, and &#x2014;the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.

Heterophasic propylene copolymer with excellent impact/stiffness balance

Polypropylene composition comprising (a) a high melt strength polypropylene having a melt flow rate MFR2 (230&#xb0; C.) of equal or below 15 g/10 min and a branching index g' of below 1.0, (b) a first heterophasic propylene copolymer comprising a polypropylene having a melt flow rate MFR2 (230&#xb0; C.) in the range of 50 to 500 g/10 min and an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-% and an intrinsic viscosity (IV) of equal or more than 2.5 dl/g, (c) a second heterophasic propylene copolymer comprising a random propylene copolymer having a melt flow rate MFR2 (230&#xb0; C.) in the range of 1 to 40 g/10 min, a branching index g&#x2032; of 1.0, and a comonomer content of more than 0.5 wt.-%, and an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-%, and an intrinsic viscosity (IV) of equal or below 2.4 dl/g, (d) a polyethylene plastomer having an ethylene content of at least 50 wt.-%, and (e) a mineral filler (F).

Stiff polypropylene composition with excellent elongation at break

Heterophasic propylene copolymer comprising (a) a matrix (M) being a polypropylene (PP), said polypropylene (PP) has a polydispersity index (PI) of at least 5.0, and (b) an elastomeric propylene copolymer (EC) dispersed in said matrix (M), wherein (i) said heterophasic propylene copolymer has a melt flow rate MFR(230&#xb0; C.) of equal or below 1.0 g/10 min, (ii) the amorphous phase (AM) of the xylene cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity (IV) of at least 3.5 dl/g.

Heterophasic polypropylene with excellent creep performance

The present invention relates to a polyolefin composition comprising a heterophasic propylene copolymer having a MFRof at least 5 g/10 min and a polyethylene (PE) having a density of at least 935 kg/mand a melt flow rate MFR5 (190&#xb0; C.) of less than 1.5 g/10 min.5

Heterophasic system with improved surface properties

The invention relates to a polypropylene composition showing a high melt flow rate and simultaneously high stiffness and a process for the production thereof. The invention further relates to a material comprising the inventive polypropylene.

Polypropylene homopolymers with high heat deflection temperature, high stiffness and flowability

Heterophasic propylene copolymer (HECO) comprising: (a) a polypropylene matrix comprising: (a) a first propylene homopolymer fraction (PPH1) with a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of &#x3e;200 to 500 g/10 min, (a) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of &#x3e;30 to &#x2266;200 g/10 min or, (a) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of &#x3e;5 to &#x2266;30 g/10 min and, (a) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of 0.03 to &#x2266;5 g/10 min, if the second propylene homopolymer fraction is fraction (a) or, (a) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of &#x3e;30 to &#x2266;200 g/10 min, if the second propylene homopolymer fraction is fraction (a), wherein the polypropylene matrix has a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of 30 to 500 g/10 min and a xylene cold soluble fraction determined at 23&#xb0; C. according to ISO 6427 in the range of 0.5 to &#x3c;2.0 wt %, (b) an elastomeric propylene copolymer dispersed in said matrix, wherein (i) said heterophasic propylene copolymer has a melt flow rate MFR(230&#xb0; C.) measured according to ISO 1133 in the range of 25 to 200 g/10 min and, (ii) as the amorphous phase (AM) of the cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity measured according to ISO 1628-1 (at 135&#xb0; C. in tetraline) of &#x2267;2.0 dl/g, and a process for its preparation.

Heterophasic propylene copolymers with stiffness/impact/flowability balance

The present invention relates to a polypropylene composition showing a high melt flow rate and high melt strength while maintaining high impact strength. The composition of the present invention is obtainable by using a low molecular weight linear isotactic polypropylene as melt flow enhancer for a high molecular weight polypropylene having a high melt strength and impact strength. The inventive composition could be used for the production of different articles.

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Pucking, Austria

Cornelia Kock