Basf Aktiengesellschaft

Gunther Schweier

Franz Langhauser

David Fischer

Jurgen Kerth

Hans-Herbert Brintzinger

Roland Hingmann

Martin Schneider

Rolf Muelhaupt

Werner Roell

Stefan Mansel

Katrin Schmidt

Heinz Mueller-Tamm

John Lynch

Martin Lux

Wolfgang Gruber

Rainer Hemmerich

Robert Bachl

Ulrich Moll

Erich Kolk

Hans Frielingsdorf

Hans-Robert-Hellmuth Damrau

Patrik Muller

Ian D McKenzie

Elke Barsties

Peter Kolle

Robin Kirsten

Stephan Seelert

Nadine Leyser

Helmut Frank

In catalyst systems of the Ziegler-Natta type modified during their preparation and comprising as active constituents

Ziegler-Natta catalyst systems modified during their preparation

Supported catalyst systems are obtainable by a) application of a mixture of

Supported metallocene catalyst systems

Polymers of C.sub.2 -C.sub.12 -alk-1-enes are prepared at from -50 to 300.degree. C. and from 0.5 to 3000 bar in the presence of a catalyst system by a process in which the catalyst system used is one which contains

Preparation of polymers of alk-1-enes in the presence of a supported

Process for converting the achiral meso form of an ansa-metallocene

Metallocene complexes with cationic bridges

Process for converting the achiral meso form or the racemate of an

A process for preparing metallocene complexes of the general ##STR1## in which the substituents have the following meanings:

Preparation of bridged metallocene complexes

A process for polymerizing C.sub.2 -C.sub.10 -alk-1-enes in the presence of a metallocene complex of the formula I ##STR1## where the substituent groups have the meanings described in the specification.

Polymerization process using metallocene complexes in the catalyst system

A process for preparing oligomers and polymers, obtained from

Oligomers and polymers of aminoalkenes

Cyclopentadineyl compounds of the formula II ##STR1## and formula III ##STR2## their preparation and their use as intermediates in the preparation of metallocene complexes of the formula I.

Racemic metallocene complexes and their preparation

Polymers of C.sub.2 -C.sub.10 -alk-1-enes are prepared at from 0.5 to 3000 bar and from -50.degree. to 300.degree. C. using a catalyst system by a process in which the catalyst system used is one which contains, as active components: a) a metallocene complex of the general formula I ##STR1## where M is titanium, zirconium, hafnium, vanadium, niobium or tantalum, X is fluorine, chlorine, bromine, iodine, hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl or --OR.sup.7,

Preparation of polymers of C.sub.2 -C.sub.10 -alk-1-enes using racemic

Propylene polymers contain A) a semicrystalline propylene homopolymer having a melting point of 125 to 165.degree. C. and a glass transition temperature which is greater than -10.degree. C. and B) a semicrystalline propylene homopolymer having a melting point below 130.degree. C. and a glass transition temperature which is less than or equal to -10.degree. C. or a non-crystallizing propylene homopolymer having a glass transition temperature which is less than or equal to -10.degree. C.

Propylene polymers having low-temperature impact strength

A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal (Me) from catalyst component (2) being from 1 : 0.1 to 1 : 500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (VI) obtained by (1.1) first bringing into contact (1.1.1) a particular finely divided, porous, inorganic oxidic material (I) and (1.1.2) a particular aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III) and (1.2) then bringing into contact (1.2.1) the solid-phase product (III) obtained from stage (1.1) and (1.2.2) a solution (IV) which is obtained on bringing together (IVa) 100 parts by weight of a particular alcohol, (IVb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IVc) from 0.01 to 4 parts by weight (calculated as magnesium) of a magnesium compound which is soluble in the alcohol (IVa), to form a dispersion (V), and evaporating the dispersion (V) until it has a dry consistency, thus forming the solid-phase product (VI). The new process is particularly advantageous for the manufacture of homopolymers and copolymers having, for example, particularly advantageous morphological properties.

Manufacture of homopolymers and copolymers of .alpha.-monoolefins

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Friedelsheim, Germany

Gunther Schweier