Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Basell Polypropylen Gmbh

Meinolf Kersting

Franz Langhauser

Roland Hingmann

Wolfgang Bidell

Rainer Alexander Werner

Bernd Lothar Marczinke

David Fischer

Klaus-Dieter Hungenberg

Jurgen Kerth

Ulrich Moll

Patrik Muller

Peter John Vaughan Jones

Juergen Kerth

G&uuml;nther Schweier

Dieter Lilge

Ingolf Hennig

Volker Rauschenberger

Günther Schweier

Stefan Seelert

Peter Koelle

Patrik Mueller

Werner Schöne

Gerald Lutz

David Appleyard

Werner Sch&ouml;ne

Murray Horton

Guenther Schweier

Joachim Rosch

Ian D McKenzie

Rueger Schlund

Peter Kolle

Karl Huber

John Russell Grasmeder

Klaus-Dieter Rumpler

Random copolymers of propylene with other 1-alkenes having up to carbon atoms,

Random propylene copolymers

Injection stretch-blow molded containers made of olefin polymers

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

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

Process for preparing carrier-borne transition metal catalysts

Random propylene copolymer

C,-C,-Alk-1-enes are polymerized by means of a Ziegler-Natta catalyst system in a reactor cascade comprising at least two reactors, a homo- or copolymer of C,-C,-alk-1-enes being prepared in a reactor R,, upstream of which one or more further reactors may be connected, the reaction mixture being discharged from R,and transferred to a subsequent reactor R,and the polymerization in R,and in the reactors which may be connected to R,being carried out in the presence of a liquid or dissolved regulator for regulating the catalyst activity, by a process in which the regulator is added to the reaction mixture after discharge from R,and before entry into R,, and an apparatus for polymerizing C,-C,-alk-1-enes by means of the novel process is described.

Polymerization of C2-C8-alk-1-enes by means of a Ziegler-Natta

A process for the homo- or copolymerization of C.sub.2 -C.sub.8 -alk-1-enes by means of a Ziegler-Natta or a metallocene catalyst system in a stirred bed of finely divided polymer from the gas phase, the transition metal-containing catalyst solid of the Ziegler-Natta or metallocene catalyst system being fed to the reactor by C.sub.2 -C.sub.8 -alk-1-ene metered into the reactor, wherein the transition metal-containing catalyst solid, together with at least some of the C.sub.2 -C.sub.8 -alk-1-ene, is fed to the reactor through one or more pipes which project perpendicularly or virtually perpendicularly from above into the gas space and end above the pulverulent stirred reactor bed.

Gas-phase polymerization of C.sub.2 -C.sub.8 -alk-l-enes by means of

Catalyst systems of the type comprising the Ziegler-Natta catalysts contain, as active components,

Catalyst systems of the type comprising the Ziegler-Natta catalysts

A novel process for the preparation of Ziegler-Natta catalyst systems containing, as active components,

Preparation of Ziegler-Natta catalyst systems

A process for preparing random propylene copolymers containing copolymerized C.sub.2 -C.sub.10 -alk-1-enes by polymerization of propylene and C.sub.2 -C.sub.10 -alk-1-enes in the presence of a Ziegler-Natta catalyst system comprising a titanium-containing solid component a) comprising a compound of magnesium, a halogen, silica gel as support and a carboxylic ester as electron donor compound, and also, as cocatalysts, an aluminum compound b) and a further electron donor compound c), where propylene and the C.sub.2 -C.sub.10 -alk-1-enes are polymerized with one another at from 50 to 100.degree. C. at pressures in the range from 15 to 40 bar and mean residence times of from 0.5 to 5 hours and the support used in the titanium-containing solid component is a silica gel which has a mean particle diameter of from 5 to 200 .mu.m, a mean particle diameter of the primary particles of from 1 to 10 .mu.m and voids or channels having a mean diameter of from 1 to 10 .mu.m, which voids or channels have a macroscopic proportion by volume based on the total particle in the range from 5 to 20%.

Process for producing improved random propylene copolymers

Partially crosslinked plastic compositions with a melt flow index at 230.degree. C. and under a load of 2.16 kg, of from 0.1 to 100 g/10 min, and a gel content of less than 12% by weight, is prepared from

Plastic compositions partially crosslinked by unsaturated esters

Propylene polymers which comprise from 25 to 97% by weight of a propylene polymer (I) containing from 0 to 15% by weight of copolymerized C.sub.2 -C.sub.10 -alk-1-enes and also comprise from 3 to 75% by weight of a further propylene polymer (II) containing from 15 to 80% by weight of copolymerized C.sub.2 -C.sub.10 -alk-1-enes, are obtainable by two-stage polymerization of propylene and C.sub.2 -C.sub.10 -alk-1-enes in the presence of a Ziegler-Natta catalyst system which comprises a titanium-containing solid component a) comprising a compound of magnesium, a halogen, silica gel as support and a carboxylic ester as electron donor compound, and also as cocatalysts an aluminum compound b) and a further electron donor compound c), where, in a first polymerization stage, propylene is polymerized in the presence or absence of further C.sub.2 -C.sub.10 -alk-1-enes at from 50.degree. to 100.degree. C., pressures in the range from 15 to 40 bar and a mean residence time of from 0.5 to 5 hours and subsequently, in a second polymerization stage, a mixture of propylene and further C.sub.2 -C.sub.10 -alk-1-enes is polymerized at from 30.degree. to 100.degree. C., pressures in the range from 15 to 40 bar and mean residence times of from 0.5 to 5 hours onto the propylene polymer obtained from the first polymerization stage, and the silica gel used as support for the titanium-containing solid component has a mean particle diameter of from 5 to 200 .mu.m, a mean particle diameter of the primary particles of from 1 to 10 .mu.m and voids or channels having a mean diameter of from 1 to 10 .mu.m, which voids or channels have a macroscopic volume as a proportion of the total particle in the range from 5 to 20%.

Propylene polymers

Growing community of inventors

Neustadt, Germany

Meinolf Kersting