Hoechst Aktiengesellschaft

Targor Gmbh

Basell Polyolefine Gmbh

Hoechst Gmbh

Tangor Gmbh

Martin Antberg

Andreas Winter

Volker Dolle

Jurgen Rohrmann

Walter Spaleck

J&uuml;rgen Rohrmann

Bernd Bachmann

Michael-Joachim Brekner

Wolfgang Anton Herrmann

Frank Kuber

Frank Osan

Ludwig Bohm

Herbert Riepl

Robert Klein

Juergen Rohrmann

Jürgen Rohrmann

Hans-Friedrich Herrmann

Michael Schreck

Hartmut Luker

Hartmut Kondoch

Frank K&uuml;ber

J Urgen Rohrmann

Frank Küber

The novel metallocenes of the formula Iin which, preferably, Mis Zr or Hf, Rand Rare alkyl or halogen, Rand Rare hydrogen, Rand Rare alkyl or haloalkyl, &#x2014;(CRR)&#x2014;R&#x2014;(CRR)&#x2014; is a single- or multi-membered chain in which Rmay also be a (substituted) hetero atom, m+n is zero or 1, and Ris hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.

Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts

A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R&#x2014;CH&#x2550;CH&#x2014;R, in which Rand Rare identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms or Rand R, together with the atoms connecting them, can form a ring, at a temperature of from &#x2212;60&#xb0; to 200&#xb0; C., at a pressure of from 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst formed from a metallocene in the meso-form or a meso:rac mixture, with meso:rac&#x3e;1:99, as transition-metal compound and a cocatalyst, wherein the metallocene is a compound of the formula I,in which Mis Zr or Hf, Rand Rare identical or different and are methyl or chlorine, Rand Rare identical or different and are methyl, isopropyl, phenyl, ethyl or trifluoromethyl, Rand Rare hydrogen or as defined for Rand R, or Rforms an aliphatic or aromatic ring with R, or adjacent radicals Rform a ring of this type, and Ris aradical, and m plus n is zero or 1.

Process for the preparation of polyolefins

Metallocene capable of being used for the process for the preparation of a syndiotactic polyolefin

Process for the preparation of a polyolefin

1-olefin isoblock polymer and process for its manufacture

2-substituted disindenylmetallocenes, process for their preparation, and their use as catalysts in the polymerization of olefins

Polyolefins prepared with metallocene catalysts having 2-substituted indenyl type ligands

Syndio-isoblock polymers of 1-olefins having molecular chains which contain syndiotactic and isotactic sequences are obtained if the polymerization of the 1-olefins is carried out using a catalyst which is composed of a bridge chiral metallocene of the formula I

Syndio-isoblock polymer and process for its preparation

Syndio-isoblock polymers of 1-olefins having molecular chains which contain syndiotactic and isotactic sequences are obtained if the polymerization of the 1-olefins is carried out using a catalyst which is composed of a bridged chiral metallocene of the formula I

Chemically homogeneous cycloolefin copolymers of polycyclic olefins, such as, for example, norbornene or tetracyclododecene, with cycloolefins and/or acyclic olefins are obtained without ring opening and in a high space-time yield if a catalyst system is used which comprises an aluminoxane and a stereorigid metallocene compound of an element from groups IVb to VIb, of the formula

Metallocene and catalyst used for the preparation of chemically homogeneous cycloolefin copolymers

A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## where M.sup.1 =Zr or Hf, R.sup.1 and R.sup.2 =(C.sub.1 -C.sub.3)-alkyl or chlorine, R.sup.3, with the proviso that at least one of the radicals R.sup.3 is not hydrogen, is hydrogen, F, Cl, --OR.sup.7, --NR.sup.7 R.sup.8, --P(O)R.sup.7 R.sup.8, --P(OR.sup.7).sub.2 or SR.sup.7, R.sup.4 is a ##STR2## radical, and m plus n are zero or 1.

Metallocene catalysts comprising indenyl ligands substituted with

If a catalyst consisting of an aluminoxane and a metallocene of the formula I ##STR1## in particular R.sup.5 R.sup.6 C (Ind).sub.2 or R.sup.5 R.sup.6 C (Ind).sub.2 Zr(CH.sub.3).sub.2, is employed for the polymerization of olefins of the formula

Process for the preparation of a polyolefin wax

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Martin Antberg