Borealis Ag

Borealis Gmbh

Qizheng Dou

Erik A Eriksson

Yi Liu

Alexandra Romina Albunia

Jeroen Oderkerk

Francis Costa

Denis Yalalov

Thomas Hjertberg

Friedrich Berger

Victor Sumerin

Tanja Piel

Anh Tuan Tran

Hermann Prokschi

Minna Aarnio-Winterhof

Jari Äärilä

Udo Wahner

Matthias Hoff

Joy Cheng

Mark Jeruzal

Peter Roos

Leonardus Welzen

Elena Pomakhina

Markus Zach

Erich Zinöcker

Erik Eriksson

The present invention relates to a polyethylene composition comprising a base resin having a density of from 952.0 kg/mto 960.0 kg/m, determined according to ISO 1183, wherein the polyethylene composition has a melt flow rate MFR(190° C., 21.16 kg), of from 1.0 to 7.5 g/10 min, determined according to ISO 1133, a complex viscosity at a frequency of 0.05 rad/s eta0.05 of from 750 kPa #s to 1900 kPa #s, determined according to ISO 6721-1 and ISO 6721-10, and a white spot rating of not more than 12.0, determined according to ISO 18553, a polyethylene composition obtainable by a multi-stage process, a process for producing said polyethylene composition, an article, such as a pipe or pipe fitting, comprising said polyethylene composition and the use of said polyethylene composition for the production of an article.

Polyethylene composition for high pressure resistant pipes with improved homogeneity

The present invention relates to a multilayer element (LE), the use of the multilayer element (LE) for producing an article, an article comprising multilayer element (LE), a layer element of at least two layers, the use of the polymer composition of the invention to produce a multilayer element, as well as to a process for producing the multilayer element (LE) and an article thereof.

Multilayer element comprising an interlayer comprising a copolymer of ethylene with a comonomer containing silane group(s)

The present invention relates to a multilayer element (LE) and to a multilayer laminated glass layer element (GLE2), the use of the multilayer element (LE) and the multilayer laminated glass layer element (GLE2) for producing an article, an article comprising multilayer element (LE) or multilayer laminated glass layer element (GLE2), a layer element of at least two layers, the use of the polymer composition of the invention to produce a multilayer element (LE) or a multilayer laminated glass layer element (GLE2), as well as to a process for producing the multilayer element (LE) and an article thereof, as well as to a process for producing the multilayer laminated glass layer element (GLE2) and an article thereof.

Multilayer element

A polymer composition comprising a base resin is disclosed herein. The base resin includes a very high molecular weight polyethylene component, a low molecular weight polyethylene component having a weight average molecular weight lower than a weight average molecular weight of the very high molecular weight component and a high molecular weight component having a weight average molecular weight higher than the weight average molecular weight of the low molecular weight component, but lower than the weight average molecular weight of the very high molecular weight component. The composition has a complex viscosity at 0.05 rad/s Etaof equal to or more than 800 kPa&#xb7;s, a viscosity at a shear stress of 747 Pa (eta747) of equal to or less than 34000 kPas and a melt flow rate MFR5 of equal to or less than 0.17 g/10 min.

Polymer composition and a process for production of the polymer composition

The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of polymerizing a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 500 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 915 kg/mto equal to or less than 960 kg/min one reaction step and polymerizing a polyethylene fraction (A-2) having a lower weight average molecular weight Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/mto equal to or less than 975 kg/min a second reaction step of a sequential multistage process wherein one of said polyethylene fractions is polymerized in the presence of the other of said polyethylene fractions to form a first polyethylene resin (A) having a weight average molecular weight Mw of equal to or more than 150 kg/mol to equal to or less than 1,500 kg/mol, and a density of equal to or more than 910 kg/mto equal to or less than 975 kg/m, wherein the weight average molecular weight Mw of the first polyethylene resin (A) is lower than the weight average molecular weight Mw of the polyethylene fraction (A-1), blending the first polyethylene resin (A) with a second polyethylene resin (B) having a weight average molecular weight Mw of equal to or more than 50 kg/mol to less than 500 kg/mol, and a density of equal to or more than 910 kg/mto equal to or less than 970 kg/mto form said multimodal polyethylene composition, wherein the multimodal polyethylene composition a melt flow rate MFR(190&#xb0; C., 5 kg) of 0.01 to 10 g/10 min and a density of equal to or more than 910 kg/mto equal to or less than 970 kg/ma polyethylene composition obtainable by said process and the polyethylene resin of said first polymerization step.

Process for producing multimodal polyethylene in-situ blends including ultra-high molecular weight fractions

The present invention relates to a multimodal polyethylene composition which can be manufactured into pipes showing improved pressure resistance comprising a high density multimodal ethylene polymer component (A) having a density of at least 930 kg/m, and a MFRof not more than 15 g/10 min, wherein said composition exhibits a LAOS-NLF defined as 

Multimodal polyethylene composition with high pressure resistance

High density polyethylene blend, comprising (A) 55 to 99 wt % of a high density multimodal polyethylene component having a density of at least 930 kg/m3, and (B) 1 to 45 wt % of an ultra-high molecular weight polyethylene homo- or copolymer component having (i) an intrinsic viscosity of at least 15.0 dl/g (ii) an a nominal viscosity molecular weight (Mv) of at least 2.0*10g/mol and (iii) a molecular weight of (M) of at least 0.7*10g/mol, and wherein said blend has an MFRof 0.05 to 10.0 g/10 min and a density of at least 925 kg/m.

Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties

Disentangled high or ultrahigh molecular weight polyethylene ((U)HMWPE) being produced with a Ziegler-Natta catalyst, characterized by (i) a factor for the normalized elastic modulus G'/G&#x2032;of less than 0.95 determined in a dynamic time sweep measurement at 180&#xb0; C. with constant strain of 0.5% at fixed frequency of 10 rad/s for at least 3600 s, whereby G&#x2032;is the elastic shear modulus measured at tdirectly after melting the sample and G&#x2032;is the maximum plateau modulus.

Disentangled high or ultrahigh molecular weight polyethylene prepared with Ziegler-Natta catalyst

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Linz, Austria

Qizheng Dou