Borealis Ag

Borealis Technology Oy

Kristin Reichelt

Luigi Resconi

Klaus Bernreitner

Pauli Leskinen

Joachim Fiebig

Juha Paavilainen

Petar Emilov Doshev

Wilfried Peter Töltsch

Kauno Alastalo

Hermann Braun

Wolfgang Stockreiter

Pablo Ivan Aguayo Arellano

Johanna Lilja

Klaus Nyfors

Cornelia Anita Tranninger

Nina Ackermans

Matthew Parkinson

Kurt Stubenrauch

Sameli Hakola

Paull Leskinen

Hannu Miettinen

Wilfried Töltsch

Martin Rauch

The present invention relates to an olefin polymerization process for producing propylene copolymer composition (P), wherein propylene, Cto C&#x3b1;-olefin and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst in a multistage polymerization process comprising at least two polymerization reactors, wherein the copolymer composition is bimodal with respect to the content of Cto C&#x3b1;-olefin and, if present, to ethylene. Further, the invention is directed to the propylene copolymer composition being bimodal with respect to the content of Cto C&#x3b1;-olefin and optionally to ethylene, and use of said propylene copolymer compositions for producing articles.

Process for preparing propylene copolymer compositions

A multi-layer blown polymer film comprising a core layer (CL) and at least one sealing layer (SL), said sealing layer(s) (SL) comprise(s) a propylene copolymer composition (P) having a comonomer content in the range of 3.0 to 8.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, said propylene copolymer composition (P) comprises a polypropylene (A) and a polypropylene (B) in the weight ratio [(A)/(B)] of 20/80 to 80/20, wherein said polypropylene (A) has a comonomer content of equal or below 4.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, and said propylene copolymer (B) has a comonomer content of 4.0 to 20.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins.

Multi-layer blown film

Disclosed is a polypropylene homopolymer having a melting temperature Tof less than 150&#xb0; C., 2,1 regio-defects of above 2.0% determined byC-NMR spectroscopy, and a weight average molecular weight Mof above 100 kg/mol. Also disclosed are a process for the preparation of the homopolymer and a polypropylene blend containing the homopolymer. Further disclosed are a pipe, sheet, film, fiber, moulded article, and extrusion coating made from the homopolymer or polypropylene blend.

Low melting PP homopolymer with high content of regioerrors and high molecular weight

A multi-layer polymer film comprising a core layer and a sealing layer, said sealing layer comprises a propylene copolymer composition, said propylene copolymer composition 

Multi-layer cast film

A process for the preparation of a propylene polymer in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a prepolymerisation step prepolymerising a single site catalyst in the presence of propylene and optionally at least one C2-10 alpha olefin comonomer and in the presence of hydrogen or in the absence of hydrogen; (II) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, with the pre-polymerised catalyst of step (I) in the presence of hydrogen; and subsequently (III) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (II) and optionally in the presence of hydrogen so as to form a propylene homopolymer or copolymer; wherein the amount of hydrogen fed to the pre-polymerisation step (I) is at most 15% of the total amount of hydrogen fed to steps (I) and (II) of the polymerisation process.

Process for the preparation of a propylene polymer

The present invention relates to a multi-layered polymer film, comprising a sealing layer and a base layer, wherein the sealing layer comprises a polypropylene (SL-PP), and wherein the sealing layer polypropylene SL-PP comprises comonomer units derived from ethylene in an amount of from 0.5 wt % to 25 wt % and from at least one C5-12 alpha-olefin in an amount of from 0.5 mol % to 4.0 mol %, and has an amount of xylene solubles XS of at least 20 wt %, and the xylene solubles have an amount of ethylene-derived comonomer units of from 4 wt % to 50 wt %.

Multi-layered polymer film

The present invention relates to an olefin polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 5 to 20 wt % and optionally ethylene-derived comonomer units in an amount of up to 3 wt %, and the Ziegler-Natta catalyst system comprises an external donor of the following formula (I): (R)(RO)Si(R).

Process for preparing propylene/1-butene copolymers

A multi-layer biaxially oriented polymer film comprising a core layer (CL) and at least one sealing layer (SL), said sealing layer(s) (SL) comprise(s) a propylene copolymer composition (P) having a comonomer content in the range of 3.0 to 8.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, said propylene copolymer composition (P) comprises a polypropylene (A) and a polypropylene (B) in the weight ratio [(A)/(B)] of 20/80 to 80/20, wherein said polypropylene (A) has a comonomer content of equal or below 4.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, and said propylene copolymer (B) has a comonomer content of 4.0 to 20.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins.

Multi-layer biaxially oriented polymer film

A multi-layer polymer film comprising a core layer and a sealing layer, said sealing layer comprises a propylene copolymer composition, said propylene copolymer composition&#x2014;has a comonomer content in the range of 3.0 to 8.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, &#x2014;comprises a polypropylene (A) and a polypropylene (B) in the weight ratio [(A)/(B)] of 20/80 to 80/20, wherein&#x2014;said polypropylene (A) has a comonomer content of equal or below 4.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins, and&#x2014;said propylene copolymer (B) has a comonomer content of 4.0 to 20.0 wt.-%, the comonomers are Cto C&#x3b1;-olefins.

Polypropylene composition which combines low sealing initiation temperature (SIT) and high melting point (T), furthermore showing a broad sealing window, low hexane solubles and good optical properties, like low haze.

Polypropylene composition combining low sealing initiation temperature, low haze, low hexane solubles and improved tear resistance and melting temperature

Polymer composite comprising propylene copolymer composition having a comonomer content in the range of 2.5 to 10 wt. -%, the comonomers are Cto C&#x3b1;-olefins, and a low-crystalline polymer having a melting temperature of below 120&#xb0; C.,

Polypropylene blend with improved balance between sit and melting point

Polypropylene composition comprising comonomer units derived from ethylene in an amount of from 9.0 to 52.0 mol-% and comonomer units derived from a higher a-olefin in an amount of from 0.4 to 3.0 mol-%, wherein said polypropylene composition has an amount of xylene cold solubles of at least 30 wt.-%, wherein further the xylene cold soluble fraction has an ethylene content of from 20.0 to 80.0 mol-% and a higher a-olefin content from 0.1 to 1.5 mol-%.

Propylene composition with improved impact resistance at low temperature

The present invention relates to a polypropylene composition comprising comonomer units derived from ethylene in an amount of from 0.5 wt % to 25 wt %, and from at least one Calpha-olefin in an amount of from 1.0 mol % to 3.0 mol %, wherein the polypropylene composition has an amount of xylene solubles XS of at least 20 wt %, and the xylene solubles have an amount of ethylene-derived comonomer units of from 4 wt % to 50 wt %.

Polypropylene composition with improved sealing and thermal properties

The present invention relates to a polypropylene composition comprising comonomer units derived from ethylene in an amount of from 1.5 wt % to 35 wt %, and from at least one Calpha-olefin in an amount of from 1.0 mol % to 3.0 mol %, wherein the polypropylene composition has an amount of xylene solubles XS of at least 40 wt %, and the xylene solubles have an amount of ethylene-derived comonomer units of from 4.0 wt % to 70 wt %.

Growing community of inventors

Neuhofen/Krems, Austria

Kristin Reichelt