Elf Atochem S.a.

Michelin Recherche Et Technique S.a.

Atochem

Total Petrochemicals Research Feluy

Centre National De La Recherche Scientifique

Other

Exxon Chemical Patents, Inc.

Atofina

Rhodia Chimie

Arkema Inc.

Total Research & Technology Feluy

Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Universite Claude Bernard – Lyon1

Bluestar Silicones France Sas

Ineos Sales (uk) Limited

Roger Spitz

Christophe Boisson

Jean Malinge

Claude Brun

Laurent Duranel

Thierry Saudemont

Julien Thuilliez

Vincent Monteil

Fanny Barbotin

Jean-Pierre Broyer

Thierry Soto

Jean-Francois Joly

Nathalie Verdel

Abbas Razavi

Frank J Chen

Pierre Robert

Floran Prades

Jerome Gromada

Christophe Le Deore

Jean-Michel Brusson

David Ribour

Veronique Pasquet

Atanas Tomov

Cristophe Boisson

Alan Guyot

Maryse Patin

Sabine Sirol

Tania Ireland

Xavier Francois Drujon

Jean-Luc Lepage

Thierry Hamaide

Jean L Malinge

Anne Seggio

Gaelle Pannier

Timothy McKenna

Melanie Muron

Karine Tortosa

Jerome Dupuy

Christopher John Whiteoak

Gaëlle Pannier

Christelle Delaite

Jerôme Claverie

V&eacute;ronique Pasquet

Barbara Gantillon

Rémi Soula

Frédéric Bortolussi

The invention concerns compositions that can be cured in the presence of water or atmospheric moisture comprising at least one polyorganosiloxane having one or a plurality of condensable group(s) or hydrolysable and condensable group(s) and at least one compound capable of catalyzing the condensation reaction of the condensable or hydrolysable and condensable groups of the polyorganosiloxane. This compound is a heterometallic complex of which the chemical formula comprises at least two different metal atoms M and M', M being an atom chosen from the group consisting of the atoms of columns 2 and 13 of the periodic table and M&#x2032; being an atom chose from the group consisting of the atoms of column 4 of the periodic table, and at least one alkoxide or chelating ligand.

Silicone composition that can be cured in the presence of water or atmospheric moisture

Activating supports may be suitably prepared by the following procedure (a) providing a porous mineral oxide support material, (b) treating the support with a phosphorus-containing compound, (c) treating the support from step (b) with an organometallic compound, (d) heating the functionalized support from step (c) under an inert gas and then under an atmosphere comprising oxygen, (e) fluorinating the support with a fluorinating agent, and (f) recovering an activating support. The activating supports are suitable used in combination with single site catalysts for the polymerization of olefins. The supports are most preferably used in combination with metallocene complexes. The preparative route for the activating supports provides for supported polymerization catalyst systems having excellent activities.

Activating supports

The present invention relates to a process for preparing an activating support for metallocene complexes in the polymerization of olefins comprising the steps of: That activating support is used to activate a metallocene catalyst component for the polymerization of olefins.

Activating supports with controlled distribution of OH groups

Borohydride metallocene complex of lanthanide, preparation process, catalytic system incorporating borohydride metallocene complex, process for copolymerization of olefins employing catalytic system. The complex corresponds to one or other of formulae A and B: where, in A, two ligands Cp, Cp, each composed of a cyclopentadienyl group, are connected to the lanthanide Ln, such as Nd, and where, in B, a ligand molecule, composed of two cyclopentadienyl groups Cp, Cpconnected to one another via a bridge P of formula MRR, M is an element from group IVa, and Rand R, which are identical or different, represent an alkyl group comprising from 1 to 20 carbon atoms, is connected to the lanthanide Ln, L is alkali metal, N is molecule of a complexing solvent, x is integral or non-integral number&#x2267;0, p is integer&#x2267;than 1 and y is integer&#x2267;0.

Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerization method using same and ethylene/butadiene copolymer obtained using said method

The present invention discloses an active supported catalyst system comprising: It also discloses a method for preparing said active support and its use in the polymerisation of polar and non polar monomers.

Transition metal complexes supported on activating support

Borohydride metallocene complex of lanthanide, preparation process, catalytic system incorporating it, copolymerization of olefins employing catalytic system and ethylene/butadiene copolymer, the butadiene units comprise 1,2-cyclohexane or 1,2- and 1,4-cyclohexane links. The complex corresponds to of formulae A and/or B:  where, in A two ligands Cpand Cp, each of a fluorenyl group, are connected to the lanthanide Ln, where, in B, a ligand molecule, composed of two fluorenyl groups Cpand Cpare connected via bridge P of formula MRR, is an element from group IVa, Rand R, which are identical or different, represent an alkyl group comprising from 1 to 20 carbon atoms, connected to lanthanide Ln, L is alkali metal, N is molecule of a complexing solvent, x is integral or non-integral number &#x2267;0 and p is integer &#x2267;1.

Borohydride metallocene complex of a lanthanide, catalytic system including the said complex, polymerisation method using same and ethylene/butadiene copolymer obtained using said method

The present invention provides a method for improving and controlling the activity of Ziegler-Natta catalyst systems.

Controlled distribution of active sites in ziegler-natta catalyst systems

A borohydride metallocene complex of a lanthanide, its process of preparation, a catalytic system incorporating a borohydride metallocene complex and a process for the copolymerization of olefins employing this catalytic system. Such a complex corresponds to one or other of the following formulae A and B: where, in the formula A, two ligands Cpand Cp, each composed of a cyclopentadienyl group, are connected to the lanthanide Ln, such as Nd, and where, in the formula B, a ligand molecule, composed of two cyclopentadienyl groups Cpand Cpwhich are connected to one another via a bridge P of formula MRR, where M is an element from group IVa, such as Si, and where Rand R, which are identical or different, represent an alkyl group comprising from 1 to 20 carbon atoms, is connected to the lanthanide Ln, where L represents an alkali metal, such as Li, where N represents a molecule of a complexing solvent, such as THF, where x is an integral or non-integral number greater than 0, where p is an integer equal to or greater than 1 and where y is an integer which is equal to or greater than 0.

A borohydride metallocene complex of a lanthanide, its process of preparation, a catalytic system incorporating it, a process for the copolymerization of olefins employing this catalytic system and an ethylene/butadiene copolymer obtained by this process, the butadiene units of which comprise 1,2-cyclohexane or 1,2- and 1,4-cyclohexane links. This complex corresponds to one or other of the following formulaeand: 

A catalytic system usable for the copolymerization of at least one conjugated diene and at least one monoolefin, a process for preparing this catalytic system, a process for preparing a copolymer of a conjugated diene and at least one monoolefin using said catalytic system, and said copolymer are described. This catalytic system includes:

Catalytic system for obtaining conjugated diene/mono-olefin copolymers and these copolymers

This invention relates to an improved method for improving the tacticity of Ziegler-Natta catalyst systems and for controlling the behaviour of the active stereospecific sites.

Controlled distribution of stereospecific sites in Ziegler-Natta catalyst systems

The present invention relates to a process for preparing an activating support for metallocene complexes in the polymerisation of olefins comprising the steps of: I) providing a support prepared consisting in particles formed from at least one porous mineral oxide; II) optionally fixing the rate of silanols on the surface of the support; III) functionalising the support with a solution containing a fluorinated functionalising agent; IV) heating the functionalised and fluorinated support of step c) under an inert gas and then under oxygen; V) retrieving an active fluorinated support. That activating support is used to activate a metallocene catalyst component for the polymerisation of olefins.

Activating supports for metallocene catalysis

Catalytic system for obtaining conjugated diene/monoolefin copolymers and these copolymers

Disclosed are ethylene and butadiene copolymers and a catalytic system usable for the synthesis of these copolymers. The copolymers have a molar content of units resulting from butadiene of &#x2267;8%, said units comprising trans-1,2 cyclohexane linkages, and a number-average molecular mass Mn of &#x2267;40,000 g/mol. The catalytic system includes: 

Ethylene/butadiene copolymers, catalytic system and process for the synthesis thereof

The invention concerns a catalyst for olefin polymerisation, of formula (I) wherein: E is an oxygen or sulphur atom; X is a phosphorus, arsenic or antimony atom; M is a nickel, palladium or platinum atom comprising a non-attributed valency; a is 1 or 2; R, R, R, identical or different can be selected among hydrogen, alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl radicals, the hydroxyl radical, the alkoxide radicals (with 1 to 20 carbon atoms), the groups &#x2014;C(O)OR'&#x2014;, &#x2014;SOY; and Z represents a hydrocarbon radical comprising 2 to 3 carbon atoms; R represents a hydrocarbon radical of valency a, provided that at least one of the radicals Z or R bears at least an electroattractive substituent 

Olefin polymerisation catalyst

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Lyons, France

Roger Spitz