Basell Polyolefine Gmbh

Basf Aktiengesellschaft

Basell Polypropylen Gmbh

Basell Poliolefine Italia S.r.l.

Basell Poliolefine Italia, S.p.a.

Bassell Polyelefine Gmbh

Basell Polypropylene Gmbh

Novolen Technology Holdings, C.v.

Wolfgang Bidell

Roland Hingmann

Franz Langhauser

David Fischer

G&uuml;nther Schweier

Ulrich Moll

Meinolf Kersting

Bernd Lothar Marczinke

Volker Fraaije

Markus Oberhoff

Peter John Vaughan Jones

Heike Gregorius

Joachim Wulff-Döring

Joachim R&ouml;sch

Nicola Stefanie Paczkowski

Carsten S&uuml;ling

Andreas Winter

Shahram Mihan

Carsten Bingel

Jörg Schottek

Roland Kratzer

Stephan H&uuml;ffer

Ralph-Dieter Maier

Markus Schopf

Joachim Rösch

Jürgen Suhm

Wolf Spaether

Hans-Jürgen Zimmermann

Horst Weiβ

Dieter Lilge

Guenther Schweier

John Lynch

Hans-Herbert Brintzinger

Rainer Hemmerich

Rainer Alexander Werner

Volker Rauschenberger

Günther Schweier

Joachim Rosch

Horst Weiss

Hans-Robert-Hellmuth Damrau

Ian D McKenzie

Joachim Roesch

John Russell Grasmeder

Patrik M&uuml;ller

Nicola Stephanie Paczkowski

Hermann Gebhart

Carsten Süling

Jürgen Oelze

Werner Sch&ouml;ne

Florian Stricker

Nicola (Hüsgen) Paczkowski

Ulrich Clemens Dahn

Armin Weber

Alexandre Segul

Ingo Treffkorn

Ulrich Dahn

J&uuml;rgen Suhm

Nicola Paczkowski

Jurgen Oelze

Joachim Zitzmann

The present invention relates to a process for preparing propylene polymer compositions in at least two-stage process wherein, in a first stage, a propylene homopolymer or a propylene copolymer comprising propylene and at least a CZ-CIO-1-alkenes other than propylene, containing at least 85% by weight of propylene, is prepared by polymerization and, in a second stage, ethylene and at least a comonomer selected from propylene and C4-C,o1alkenes are polymerized to give an ethylene polymer, comprising at least 90% by weight of ethylene, wherein the amount of the ethylene polymer in the propylene polymer composition ranges from 10 to 50% by weight and the propylene polymer composition has a melt flow rate MFR, in accordance with ISO 1133 at 230&#xb0; C. and 2.16 kg, of from 2 to 50 g/10 min.

At least two-stage process for preparing propylene polymer compositions

A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.

Transition metal compound, ligand system, catalyst system and its use for the polymerization and copolymerization of olefins

Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefins

The invention relates to highly flowable propylene block copolymers that comprise 50 to 80 wt.-% of a propylene homopolymer and 10 to 70 wt.-% of a propylene copolymer having 5 to 50 wt.-% of a C&#x2013;Calk-1-ene polymerized into it that is different from propylene, and that are obtainable from the gaseous phase by a two-step polymerization by means of a Ziegler-Natta catalyst system. In a first polymerization step, the propylene is polymerized at a pressure of 10 to 50 bar, a temperature of 50 to 100&#xb0; C. and an average dwelling time of the reaction mixture of 0.3 to 5 hours in the presence of at least 2.0% by volume, based on the total volume, of hydrogen. The propylene homopolymer obtained in said first polymerization step is transferred together with the Ziegler-Natta catalyst system into an intermediate container, expanded for 0.01 to 5 minutes to less than 5 bar and maintained at a temperature of 10 to 80&#xb0; C. The pressure in the intermediate container is then increased by 5 to 60 bar by introducing under pressure a gaseous mixture, and the propylene homopolymer is then transferred to a second polymerization step together with the Ziegler-Natta catalyst system. In said second polymerization step, a mixture from propylene and a C&#x2013;Calk-1-ene is polymerized into the propylene homopolymer at a pressure of 10 to 50 bar, a temperature of 50 to 100&#xb0; C. and an average dwelling time of 0.5 to 5 hours. The weight ratio between the monomers reacted in the first and those reacted in the second polymerization step are adjusted to be in the range of from 4:1 to 1:1.

Highly flowable propylene block copolymers

Catalyst solid for olefin polymerization comprising

Catalytic solid supported on calcined hydrotalcite for olefinic polymerisation

Catalyst system for olefin polymerization comprising

Catalyst system for carrying out olefin polymerization comprising a calcined hydro-talcite serving as a supporting material

A catalyst solid for olefin polymerization comprising

Method for production of a solid catalyst for olefin polymerization

In a process for preparing a metal-containing supported catalyst or a metal-containing supported catalyst component by impregnation of a support material with an impregnation solution comprising the metal component, the impregnation solution flows through the support material.

Preparation of a metal-containing supported catalyst or a supported catalyst component by impregnation of a support material

Injection stretch-blow molded containers made of olefin polymers

A semicrystalline propylene polymer composition with good suitability for producing biaxially oriented films and prepared by polymerizing propylene, ethylene and/or C -C -1-alkenes, where at least 50 mol % of the monomer units present arise from the polymerization of propylene. Also described is the use of the semicrystalline propylene polymer composition for producing films, fibers or moldings, the films, fibers and moldings made from these compositions, biaxially stretched films made from the semicrystalline propylene polymer compositions, and also a method for characterizing the semicrystalline propylene polymer compositions.

Semicrystalline propylene polymer compositions with good suitability for producing biaxially oriented films

The invention relates to a method for producing a supported catalyst which contains metal, or a supported catalyst constituent which contains metal by impregnating a supporting material with an impregnating solution containing the metal constituent, whereby the impregnating solution flows through the supporting material.

Method for producing a supported catalyst

Propene terpolymers with a low extractable portion

A sealable coextruded film is made from at least one outer layer and from at least one base layer, where the outer layer is composed of a propylene terpolymer comprising from 80 to 99.5 mol % of structural units derived from propylene, from 0.2 to 15 mol % of structural units derived from ethene or from a C -C 1-olefin (I) and from 0.3 to 15 mol % of structural units derived from another C -C 1-olefin (II) different from the C -C 1-olefin (I), and where the propylene terpolymer has been prepared using metallocene catalysts.

Sealable multilayer film made of a grafted terpolymer

Catalyst systems of the Ziegler-Natta type

In a process for the polymerization of C -C -alk-1-enes by means of a Ziegler-Natta catalyst system, in which polymerization is carried out from the gas phase in at least one reaction zone at from 40 to 120&deg; C. and pressures of from 1 to 100 bar, the pressure and temperature in the reaction zone are set so that an operating point formed by these parameters in a pressure-temperature diagram is located at from 0.2 to 5.0 bar below the dew line of the respective reaction mixture above which condensation of the C -C -alk-1-enes occurs.

Gas-phase polymerization of C2-C8-alk-1-enes

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Mutterstadt, Germany

Wolfgang Bidell