Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Michelin Recherche Et Technique S.a.

Total Petrochemicals Research Feluy

Elkem Silicones France Sas

Cpe Lyon Formation Continue Et Recherche-cpe Lyon Fcr

Arkema France

Bostik Sa

Bluestar Silicones France Sas

Cnrs

Ecole Superieure De Chimie Physique Electronique De Lyon

Elken Silicones France Sas

Vincent Monteil

Jean Raynaud

Roger Spitz

Christophe Boisson

Sébastien Marrot

Magali Bousquie

Delphine Crozet

Magali Bousquié

Magali Puillet

Christophe Navarro

Guillaume Michaud

Federico Sanz

Tania Ireland

Frédéric Simon

Jean-Pierre Broyer

Anne Seggio

Sébastien Norsic

Alexandra Leblanc

Lionel Bosco

The present invention relates to a method for producing a composition comprising at least one polyurethane with NCO end groups, and at least one catalyst B selected from among tertiary amines, said method comprising the following steps: a) production of a polyurethane with NCO end groups, comprising a step of polyaddition of a polyol composition and a polyisocyanate composition, in the presence of at least one catalyst A selected from the group consisting of—organo-metallic catalysts excluding tin-based catalysts, —tertiary amines, and—mixtures of same; and b) the addition of at least one catalyst B, selected from among tertiary amines, to the polyurethane with NCO end groups obtained in step a).

Method for producing a composition comprising a polyurethane with NCO end groups

The subject of the present invention is the use, as hydrosilylation and/or dehydrogenative silylation catalyst, of a cobalt compound of formula (1): [CO(N(SiR))]in which: &#x2014;the R symbols, which are identical or different, represent a hydrogen atom or a hydrocarbon-based radical having from 1 to 12 carbon atoms, and preferably the R symbols, which are identical or different, are chosen from the group consisting of: a hydrogen atom, alkyl groups having from 1 to 8 carbon atoms and aryl groups having from 6 to 12 carbon atoms, &#x2014;x=1, 2 or 3 and&#x2014;y=1 or 2.

Cobalt compound useful as catalyst for hydrosilylation, dehydrogenative silylation and crosslinking of silicone compositions

An object of the present invention is the use of iron compounds as hydrosilylation and dehydrogenative silylation catalysts.

Iron compound useful as hydrosilylation, dehydrogenative silylation and crosslinking catalyst for silicone compositions

A precatalyst for the polymerization of &#x3b1;-olefins, having the formula FeMX(LA)(LB)wherein:

Iron-based precatalyst and its use in the polymerization of &#x3b1;-olefins

The invention relates to a crosslinkable composition X, comprising: at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms; at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom; at least one catalyst C which is a complex corresponding to the following formula: [Fe(L1)2] in which: the symbol Fe represents iron at degree of oxidation II; the symbols L1, which may be identical or different, represent a ligand which is a &#x3b2;-dicarbonylato anion or the enolate anion of a &#x3b2;-dicarbonylated compound; optionally at least one adhesion promoter D; and optionally at least one charge E. The invention also relates to the use of the previously described catalyst C as silicone composition crosslinking catalyst, to a silicone composition crosslinking method, wherein it comprises heating the composition X to a temperature of between 70 and 200&#xb0; C., and to the resulting crosslinked silicone material Y.

Silicone composition crosslinking catalysts

The invention relates to a crosslinkable composition X, comprising: at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms; at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom; at least one catalyst C which is a complex corresponding to the following formula: [Co (L1)2] in which: the symbol Co represents cobalt at degree of oxidation II; the symbols L1, which may be identical or different, represent a ligand which is a &#x3b2;-dicarbonylato anion or the enolate anion of a &#x3b2;-dicarbonylated compound; optionally at least one adhesion promoter D; and optionally at least one filler E. The invention also relates to the use of the previously described catalyst C as silicone composition crosslinking catalyst, to a silicone composition crosslinking method, characterized in that it consists in heating the composition X to a temperature of between 70 and 200&#xb0; C., and to the resulting crosslinked silicone material Y.

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

The present invention relates to copolymers with polar and non-polar olefin blocks with a variable polar monomer content of 0.1 mol % to 99.9 mol %. The invention also relates to a method for obtaining copolymers with olefin blocks and vinyl polar monomer blocks, said method using a single-component catalytic system made up of an organometallic complex containing a metal belonging to groups VIII to X. Said organometallic complex is advantageously active in the medium without adding cocatalyst.

Copolymers with polar and non-polar olefin blocks

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

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

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Lyons, France

Vincent Monteil