Rhone-poulenc Chimie

Rhone-poulenc Sante

Flamel Technologies

Centre National De La Recherche Scientifique

Rhodia Chimie

Rhodia Operations

Universite Claude Bernard – Lyon1

Michelin Recherche Et Technique S.a.

Rhodia Acetow Gmbh

Fonds De Developpement Des Filieres Des Oleagineux Et Proteagineux Fidop

Fidop (fonds De Developpement Des Filieres Des Oleagineux Et Des Proteagineux)

Vencorex Frence

Rhone-poulenc Sante Les Miroirs

Gerard Mignani

Didier Morel

Remi Meyrueix

Jean-Jacques Lebrun

Philippe Karrer

Pierre Marcel Ardaud

Gerard Soula

Pascal Barthelemy

Yves Bomal

Marc Lemaire

Christian Priou

Yves Camberlin

Jean-Manuel Mas

Yann Raoul

Eric Da Silva

Gilles Hugues Tapolsky

Mathias Destarac

Pierre F Chabardes

Salvatore Pagano

Philippe Olier

Philippe Jost

Claude Mercier

Nathalie Guennouni

Stefan Breunig

Ties Karstens

Yves Gnanou

Armin Stein

Frederic Leising

Antoine Baceiredo

Daniel Taton

Tsuyoshi Kato

Michel Vaultier

Christel Thonier

Lucile Gambut

Evelyne Chassagneux

Wissam Dayoub

Pierre Barruel

Christian Fischer

Maurice Charpenel

Julien Debray

Fabien Bonnette

Gopakumar Sivasankarapillai

Christiane Blanchard

Christophe Richard

Roger Trichon

Bernard Pontini

Storet Isabelle

Christian Allandrieu

The invention relates to a method for producing a compound of fonnula (I), comprising the reaction, in the presence of a catalytic system comprising a single rare earth oxide or a mixture of rare earth oxides, of an alkyl carbonate or an alkylene carbonate with a polyol of fonnula (II), wherein p is a whole number between 2 and 10.

Method for producing polyglycerol (poly)carbonate

Disclosed is a method for preparing, by transcarbonation, a compound of formula (I), including reacting a polyol of formula (II) with an alkyl carbonate or an alkylene carbonate in the presence of a catalytic system consisting of a catalytic entity selected from among the rare earth oxides or the mixtures thereof, and optionally an inert substrate.

Method for preparing alcohol carbonate using rare earth oxides as catalysts

The present invention relates to a process for preparing a compound comprising at least a urethane group &#x2014;HN&#x2014;C(&#x2550;O)&#x2014;O, said process comprising a step (E) in which a compound (I) comprising at least an isocyanate functional group &#x2014;N&#x2550;C&#x2550;O is reacted with an organic compound (II) carrying at least a hydroxyl group &#x2014;OH, said reaction being carried out in a presence of a carbene (III) used as a catalyst.

Synthesis of urethanes and polyurethanes catalysed by carbenes

The present invention is directed to a rubber composition comprising a diene elastomer, a reinforcing white filler, and a (white filler/elastomer) coupling agent, which is bifunctional and which can be bonded to the elastomer by means of a function X. The coupling agent X function is an ester function of an unsaturated &#x3b1;-&#x3b2; acid bearing a carbonyl group on its &#x3b3; position and having the general formula (X): where R, Rand Rmay be the same or different, where R is a monovalent hydrocarbon radical, and where Rand Rmay be a hydrogen atom or a monovalent hydrocarbon radical. The rubber composition of the present invention is useful for the manufacture of tires or semi-finished products for tires, such as tire treads.

Rubber compositions for use in tires, comprising a (white filler/elastomer) coupling agent with an ester function

A method has been developed for making regenerated cellulose yarn. The method includes the steps of spinning a solution derived from cellulose or a cellulose derivative in a molten state through at least one extrusion die, then regenerating the cellulose by treating the resulting yarn, wherein a silylated cellulose derivative is prepared by reaction with a silylating agent; the silylated cellulose is extracted from the synthesis reaction medium; then spun through at least an extrusion die; and the resultant yarn treated with a desilylation agent to regenerate the cellulose and a siloxane. The resulting cellulose yarns or fibers may be used for making woven or knitted textile surfaces or non-woven surfaces. Said yarns or fibers are also useful as reinforcing fibers in elastomeric materials and more particularly, in tires.

Method for preparing a regenerated cellulose fibre or yarn

The invention concerns a novel method for preparing stable silicone fluid containing &equiv;SiH groups. The preparation method is carried out from a first silicone fluid containing &equiv;SiH groups and monomers with both a functional group and a group capable of hydrosylilation; the mol ratio monomer &equiv;SiH of said fluid ranging from 0.0001 and 1. The fluids obtained by this novel method are used particularly for producing antiadhesive coatings.

Process for preparing a stable silicone oil containing SiH groups and hydrosilylable functions

The present invention relates to a process for preparing multifunctionalized polyorganosiloxanes (POSs) comprising alkoxyl functional siloxyl units and siloxyl units each having an SH functional group, which consists in introducing the SH functional group by the reaction of H S on a precursor POS of formula: A&mdash;(RXSiO) &mdash;(RYSiO) &mdash;B where R is especially a C -C alkyl radical, X is a C -C alkoxyl radical, Y is a C -C hydrocarbon group which includes an ethylenically unsaturated group from which the SH functionality derives, a is a number ranging from 1 to 150, b is a number ranging from 1 to 150, the number a&plus;b ranging from 2 to 300 and A and B are terminal groups which are selected respectively, from, in particular, on the one hand (R) SiO&mdash; radicals taken alone or as mixtures with (R) XSiO&mdash; and/or R(X) SiO&mdash; and/or (X) SiO&mdash; radicals and on the other hand &mdash;Si(R) radicals taken alone or as mixtures with &mdash;SiX(R) and/or &mdash;Si(X) R and/or &mdash;Si(X) radicals.

Method for preparing polyorganosiloxanes (POS) with thiol functions, POS obtainable by this method and their use particularly in rubber materials

Functionalized inorganic oxide hydroxylated carrier and method for

The present invention relates to compounds composed essentially of a linear, cyclic or branched polyorganosiloxane having, per molecule, at least 3 siloxy units, including at least one siloxy functional unit of formula: ##STR1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical, X contains an N,N'-di- and/or trisubstituted phenylenediamine functional group, bonded to the silicon via an Si-(hydrocarbon linking unit)-N and/or Si-(hydrocarbon linking unit)-C bond, and a is a number chosen from 0, 1 and 2. The present invention also relates to the use of such compounds as antiozonants for rubbers and in particular for rubber compositions for tires.

Silicone compounds containing a phenylenediamine functional group and

Chemically stable, perfluorinated, linear or cyclic polyorganosiloxanes (POS), and a process for the preparation thereof. Antifoams, agents for lowering surface tension, dirt repellents, antiadhesives, lubricants, oleophobic and/or hydrophobic agents, coatings and other compositions containing the perfluorinated POS are disclosed.

Perhalogenated polyorganosiloxanes and the processes for their

The present invention relates to linear, cyclic or branched polyorganosiloxanes having, per molecule, at least three siloxy units, including at least one functional unit of formula: ##EQU1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical and X contains a secondary or tertiary cyclic amine functional group bonded to the silicon via an Si--A--C bond where A is a residue comprising a cyclic acetal group. X more specifically represents a monovalent group of formula: ##STR1## The present invention also relates to the use of such polyorganosiloxanes in polymers for improving in particular their photostabilization.

Silicone compounds containing sterically hindered cyclic amine

The present invention relates to compounds composed essentially of a linear, cyclic or branched polyorganosiloxane having, per molecule, at least 3 siloxy units, including at least one siloxy functional unit of formula: ##STR1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical, X contains an N,N'-di- and/or trisubstituted phenylenediamine functional group, bonded to the silicon via an Si--(hydrocarbon linking unit)--N and/or Si--(hydrocarbon linking unit)--C bond, and a is a number chosen from 0, 1 and 2. The present invention also relates to the use of such compounds as antiozonants for rubbers and in particular for rubber compositions for tires.

Novel nonlinearly optically active compound's, well suited for electrooptical applications, have the following general formulae: ##STR1## wherein D is an electron donor group; A and A.sub.1, which may be identical or different, are each an electron acceptor group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a lower alkyl radical or a hydrogen atom.

Nonlinearly optically active compounds

Monodisperse, homogeneous polyaminoborazines, well suited for pyrolysis into ceramic BN shaped articles, e.g., fibers, films, etc., are prepared by thermally polycondensing a trifunctional aminoborazine under conditions of polycondensation reaction equilibrium.

Preparation of polyaminoborazines

Nonlinearly optically active monomer species comprising at least two carbon-carbon activated double bonds, i.e., the polymerization of which is facilitated by the presence of an electron attracting function, and a non-centrosymmetric system of pi (.pi.) conjugated bonds bearing at least one electron attracting group on one terminal thereof and at least one electron donor group on the other terminal, are readily (co)polymerized and optionally oriented and crosslinked into shaped articles well adopted for the manufacture of a variety of electrooptical devices; such monomer species can have, for example, the following structural formula (I): ##STR1##

Optionally oriented, monomeric and polymeric nonlinearly optically

Growing community of inventors

Lyons, France

Gerard Mignani