Borealis Ag

Borealis Technology Oy

Borealis Gmbh

Friedrich Berger

Markus Gahleitner

Jingbo Wang

Klaus Bernreitner

Karlheinz Friedrich

Luigi Resconi

Claudia Kniesel

Minna Aarnio-Winterhof

Katja Ellen Klimke

Martina Sandholzer

Markku Vahteri

Peter Niedersüss

Luca Boragno

Stefan Ortner

Manfred Gruenberger

Pauli Leskinen

Georg Grestenberger

Kauno Alastalo

Daniela Mileva

Petar Emilov Doshev

Johanna Lilja

Joachim Fiebig

Vasileios Kanellopoulos

Christelle Grein

Thomas Lummerstorfer

Cornelia Anita Tranninger

Victor Sumerin

Wilfried Peter Töltsch

Jani Aho

Elisabeth Potter

Thomas Horill

Davide Tranchida

Qizheng Dou

Girish Suresh Galgali

Matthias Hoff

Andreas Albrecht

Shital Das

Mattias Hoff

Satu Rintakari

Elena Pomakhina

Markus Zach

Juulia Hirvonen

Arnaud Alabrune

Herbert Klopf

Luigi Maria Resconi

Peter Niedersüß

The present invention relates to a heterophasic polyolefin composition and articles produced therefrom with improved mechanical and optical properties, particularly low stress whitening. The present invention further relates to a process for the preparation of such a heterophasic polyolefin composition, articles made therefrom, particularly films, and uses of the heterophasic polyolefin composition. The heterophasic propylene copolymer composition comprises a heterophasic propylene copolymer (HECO) comprising a matrix (M) being a propylene homopolymer (H-PP) and an elastomeric propylene copolymer (EPC) dispersed in said matrix (M), wherein the heterophasic propylene copolymer (HECO) has (a) a melt flow rate MFf¾ (2.16 kg, 230° C.) measured according to ISO 1133 in the range of 5.0 to 25.0 g/10 min, (b) a soluble fraction content (SF) determined by TREF fractionation on CRYSTEX QC, Polymer Char (Valencia, Spain) in the range of 10.0 to 25.0 wt. %, (c) an ethylene content of the soluble fraction content (SF) in the range of from 18 wt. % to less than 39 wt. %, (d) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1 (in decalin at 135° C.) of the soluble fraction (SF) in the range of from 1.5 to 2.5 dl/g, (e) a crystalline fraction content (CF) determined by TREF fractionation on CRYSTEX QC, Polymer Char (Valencia, Spain) in the range of 75 to 90 wt. %, (f) an ethylene content of the crystalline fraction content (CF) of from 0.1 wt. % to 5.0 wt. %, and the heterophasic propylene copolymer composition has a total ethylene content in the range of from 7 to 30 wt. %, determined by quantitative NMR spectroscopy.

Low stress whitening polypropylene composition

Disclosed is a process for producing a propylene polymer composition, which includes (a) polymerizing propylene in the presence of a polymerization catalyst to produce a propylene polymer; (b) recovering the propylene polymer, wherein the recovered propylene polymer has a xylene cold solubles (XCS) fraction in an amount of less than 3.0 wt. % based on the total weight amount of the recovered propylene polymer; (c) extruding the propylene polymer in the presence of a peroxide for introducing long chain branching into the propylene polymer to form a propylene polymer composition; and (d) recovering the propylene polymer composition, wherein the recovered propylene polymer composition of step (d) has a lower melt flow rate MFR(230°° C., 2.16 kg) compared to the recovered propylene polymer of step (b). Also disclosed is an article comprising said propylene polymer composition.

Long-chain branched propylene polymer composition

The present invention is directed to a propylene polymer composition comprising at least one propylene copolymer (C-PP), and an α-nucleating agent (NU), wherein the propylene copolymer (C-PP) comprises two propylene copolymer fractions (PP1) and (PP2), wherein propylene copolymer fraction (PP1) is contained in the propylene copolymer (C-PP) in an amount of 30 to 70 wt. % and the propylene copolymer fraction (PP2) is contained in the propylene copolymer (C-PP) in an amount of 70 to 30 wt. %, the comonomer content of propylene copolymer fraction (PP1) is in the range of 0.5 to 2.5 wt.-% and the comonomer content of the propylene copolymer fraction (PP1) is lower compared to the comonomer content of the propylene copolymer fraction (PP2), and the propylene polymer composition has (a) a melt flow rate MFR(230° C.) measured according to according to ISO 1133 of 1 to 5 g/10 min., and (b) a comonomer content of 4.0 to 8.0 wt. %, the comonomer(s) being ethylene and/or at least one Cto Cα-olefin. The above propylene polymer composition has improved impact and optical properties. The invention further provides a method of producing the above propylene polymer composition and an extrusion blow molded article comprising the above propylene polymer composition.

Random propylene polymer composition and use in extrusion blow moulding

New polypropylene composition which combines low sealing initiation temperature (SIT), high hot-tack, good optical properties, like low haze and its use, and improved stiffness/impact balance.

Polypropylene composition

The present invention relates to a propylene polymer composition comprising a long chain branched propylene polymer, wherein said propylene polymer composition has a) a melt flow rate MFR(230&#xb0; C., 2.16 kg) of 0.8 to 6.0 g/10 min b) a xylene hot insolubles (XHU) fraction in an amount of not more than 0.80 wt %, based on the total weight amount of the propylene polymer composition, c) a melting temperature Tm of at least 160.0&#xb0; C., d) a F30 melt strength of from 5.0 to less than 30.0 cN, and e) a heat distortion temperature (HDT) of at least 108&#xb0; C., a process for producing said propylene polymer composition by reactive modification of a propylene polymer in the presence of a peroxide, an article comprising said propylene polymer composition and the use of said propylene polymer composition for producing an article.

New polypropylene composition, which combines low sealing initiation temperature (SIT), high hot-tack and good optical properties, like low haze, the use of such polypropylene composition and articles made therefrom.

The present invention relates to a polypropylene based composition comprising: (A) from 40.0 to 85.0 wt % of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in the range of 15 wt % to 35 wt %, based on the total weight of the heterophasic propylene copolymer; (B) from 5.0 to 15.0 wt % of a terpolymer of propylene with ethylene and 1-butene comonomer units having a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140&#xb0; C.; (C) from 5.0 to 25.0 wt % of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/mto 900 kg/m; and (D) from 5.0 to 25.0 wt % of an inorganic filler, wherein the amounts of components (A), (B), (C), and (D) are all based on the total weight amount of the polypropylene based composition, said polypropylene based composition having a melt flow rate (MFR2) as measured at 230&#xb0; C. and 2.16 kg load in accordance with ISO 1133 in the range of 2.0 g/10 min to 20 g/10 min, an article comprising said polypropylene based composition and the use of said terpolymer (B) for reducing the paint adhesion failure of an article comprising said polypropylene based composition.

Polypropylene based composition with improved paint ability

New polypropylene composition which combines low sealing initiation temperature (SIT), high hot-tack and good mechanical properties, like high dart drop strength (DDI), and its use especially for film applications.

Polypropylene composition with improved sealing behaviour

Multilayer film comprising at least a skin layer, a core layer and an inner layer, the skin layer comprising a homo polypropylene or a random propylene ethylene copolymer including up to 2.5 wt.-% units derived from ethylene, the homopolypropylene or the random propylene ethylene copolymer having a MFR2 (ISO1 133, 230&#xb0; C.) of 2.0 to 20 g/10 min and a melting temperature (Tm) of above 148&#xb0; C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10&#xb0; C./min; the core layer comprising a mixture obtainable by melt blending 20 to 100 wt.-% of a random heterophasic copolymer and 0 to 80 wt.-% of styrene based TPE, whereby the random heterophasic copolymer has a melting temperature (Tm) of 134&#xb0; C.-148&#xb0; C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10&#xb0; C./min and includes a propylene ethylene copolymer rubber; and whereby the styrene based TPE has a styrene content of from 5 to 20 wt.-%, and the inner layer comprising a random propylene ethylene copolymer having a melting temperature (Tm) from 132&#xb0; C. to 144&#xb0; C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10&#xb0; C./min, wherein the multilayer film is free of phthalic acid esters as well as decomposition products thereof.

Multilayer polyproylene film

The present invention deals with a new unimodal propylene-ethylene random copolymer providing improved resistance against gamma irradiation as well as compositions comprising the new unimodal propylene-ethylene random copolymer and final articles made therefrom.

Propylene-ethylene random copolymer with improved irradiation resistance

The invention relates to a polypropylene composition which combines low sealing initiation temperature (SIT) and high melting point (Tm), thus having a broad sealing window.

Polypropylene composition combining low sealing initiation temperature and high melting temperature

A propylene copolymer composition comprising A) a propylene butylene copolymer which is&#x2014;free of phthalicacid esters as well as decomposition products thereof; &#x2014;obtained by a Ziegler-Natta catalyst and B) at least one &#x3b1;-nucleating agent, the propylene copolymer composition having&#x2014;a MFR (2.16 kg/210&#xb0; C.) in the range of 2 to 100 g/10 min&#x2014;a melting point Tm(1) of less than 140&#xb0; C.&#x2014;a melting point Tm(2) of at least 150&#xb0; C., said Tm(2) being associated with more than 75% of the total melting enthalpy and whereby the propylene copolymer&#x2014;has monomer units derived from a) propylene in an amount of 90.0-98.0 mol.-% b) butylene in an amount of 2.0-10.0 mol.-% with respect to the total weight of the propylene butylene copolymer&#x2014;an isotacticity mm % as determined byC NMR spectroscopy of below 99.0%; and&#x2014;a Koenig-B parameter with respect to butylene as determined byC NMR spectroscopy of more than 0.98.

Nucleated C3C4 copolymers

Soft polypropylene composition with improved optical and mechanical properties and especially improved resistance to steam sterilization, as well as to its manufacture and use and to articles made out of the new composition.

Soft polypropylene composition with improved properties

The present invention is directed to a polypropylene composition (C) comprising a heterophasic propylene copolymer (RAHECO) and a propylene homopolymer (H-PP) as well as a process for the preparation of said polypropylene composition and a film obtained from said polypropylene composition (C).

Soft and transparent polypropylene composition

The present invention relates to a nucleated heterophasic polypropylene composition, which shows improved properties in view of mechanical and optical behaviour as well as low amounts of extractable. The present invention also relates to films and final articles made out of the heterophasic polypropylene composition, as well as their use in packaging, especially food packaging applications.

Heterophasic polypropylene composition with improved mechanical and optical properties

Growing community of inventors

Linz, Austria

Friedrich Berger