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Bluestar Silicones France

Gérard Mignani

Mathias Destarac

Samir Z Zard

Chakib Kalai

Salvatore Pagano

Virginie Pevere

Jean-Claude Tardivat

Nathalie Guennouni

Lucile Gambut-Garel

Christiane Blanchard

Lucile Gambut

Fernande Boisson

Hervé Adam

Zofia Agnieszka Wilczewska

Jean-Marc Frances

Sergio Mastroianni

Adrien Dromard

Virginie Harle

Thierry Vidal

Pierre-Yves Lahary

Martial Deruelle

Christian Mirou

Sandra Chouzier

Christian Allandrieu

Delphine Blanc-Magnard

Jean-Paul Benayoun

Béatrice Sire

Flavie Sarrazin

Christelle Mauger

Carlos José Araujo Da Silva

Simon Rousseau

Didier Dahler

José-Louis Roca-Ortega

Samir Mansouri

José-Carlos Araujo-Da-Silva

Véronique Hantin

Michel Sciolla

Frédéric Dallemer

Samuel Arthaud

Shaped article substrates, e.g., plastics, textiles, extrudates, films, etc., having silicone material coverings adhered thereto, are delaminated by treating same with an aqueous solution containing an alkali metal or alkaline earth metal hydroxide and a phase transfer catalyst; particular such shaped article substrates are airbag type of inflatable protection bags having layers of silicone elastomer adhered thereto and used for the protection of the occupants of a motor vehicle.

Delaminating shaped article substrates having silicone coverings adhered thereto

The invention relates to a method for reducing the COcontent of a gas by contacting the gaseous effluent to be treated with an absorbent that contains a COtrapping agent in the impregnated state on a substrate made of a solid composite material (M) containing a polymer (P) and a compound (C) selected from mineral oxides, silico-aluminates, and activated carbon, wherein said material (M) has an average particle size (D50) higher than or equal to 100 &#x3bc;m, and a pore space (Vd1) defined by pores having a diameter of between 3.6 and 1000 nm and which is at least 0.2 cm/g. The invention also relates to specific absorbents used in said method.

Method for treating a gas to reduce the carbon dioxide content thereof

A process for preparing dicarboxylic acids is described. More particularly a process is described for preparing adipic acid (1,6-hexanedioic acid), by the action of nitric acid, starting from cyclic ketones or alcohols which are the corresponding compounds from the standpoint of the number of carbon atoms, in the presence of one or more oxides of nitrogen at a molar concentration in the reaction mixture of greater than 2.5 mmol per kg of reaction mixture.

Process for preparing dicarboxylic acids

A method for processing a CO-containing gas in order to reduce the carbon dioxide content thereof, includes contacting the gas with a compound of at least one rare earth element, whereby the carbon dioxide is adsorbed onto the compound and a carbon dioxide-depleted gas is thus obtained; such compound is more particularly an oxide, and the rare earth element is particularly selected from among cerium, lanthanum or praseodymium.

Treatment of gases to reduce the carbon dioxide contents thereof

At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, Rand R=methyl and R=ethoxy.

Preparation of alkoxy- and/or halosilane (poly)sulfides and coupling agents comprised thereof

The invention relates to the field of silicon resins, particularly polymethylvinylsiloxane resins. The invention more specifically relates to a method for the production of polymethylvinylsiloxane resins comprising at least two different types of siloxy motifs RSiO(motif M) and SiO(motif Q, optionally Q), said method comprising the following steps: a) producing a siloxane resin comprising motifs Q by acidic hydrolysis of a siloxane resin precursor, preferably an alkaline silicate; b) functionalizing the siloxane resin obtained in step a) with halogenosilanes in the presence of an apolar solvent, the functionalizing generating sub-products including volatile oligosiloxanes (silox); c) recovering silox produced in step b) in a solution in the apolar solvent; and d) subjecting the resin functionalized in step b) to rearrangement with the aid of a strong base in order to eliminate the silanols, wherein at least a part of the silox produced during step b) and recovered in step c) is recycled.

Method for the production of polymethylvinylsiloxane resins with recycling of volatile oligoorganosiloxanes

The invention concerns the preparation of halogenated monoorganoxysilanes, of formula (I), said compounds being useful as synthesis intermediate in organic chemistry. Said method for preparing monoorganoxysilanes consists in: using as starting product halogenoalkylsilanes of the (CH)SiCltype and in substituting the silicon with a radical bearing a divalent unit bound to an electrophilic reactive group capable of reacting with at least an appropriate nucleophilic agent to form a functionalised monoorganoxysilane of formula (II) with, for example: R&#x3c;1&#x3e;=C-Calkyl; R&#x3c;2&#x3e;, R&#x3c;3&#x3e;=C-Calkyl; B=C-Calkylene; m=1 or 2; Hal=halogen; W=amino, mercapto, (organosilyl)-organopolythio radical.

Method for obtaining halogenated monoorganoxysilanes useful in particular as synthesis intermediates

The invention concerns the preparation of halogenated monoorganoxysilanes, of formula (I), said compounds being useful as synthesis intermediate in organic chemistry. Said method for preparing monoorganoxysilanes consists in: using as starting product halogenoalkylsilanes of the (CH)SiCltype and in substituting the silicon with a radical bearing a divalent unit bound to an electrophilic reactive group capable of reacting with at least an appropriate nucleophilic agent to form a functionalised monoorganoxysilane of formula (II) 

Process for obtaining halogenated monoorganoxysilanes which can be used in particular as synthesis intermediates

An elastomeric composition usable for the manufacture of tires, based on at least (i) a diene elastomer, (ii) an inorganic filler as reinforcing filler and (iii), as (inorganic filler/diene elastomer) coupling agent, a organosilicon compound which is at least bifunctional and can be grafted on to the elastomer by means of a sulfur group having a polythiosulfenamide function, of formula:&#x2261;Si&#x2014;A&#x2014;S&#x2014;NRR,&#x2003;&#x2003;(I)in which:

Tire rubber composition comprising a coupling agent having a polythiosulfenamide function

The present invention relates to a method of creating a carbon-heteroatom bond, and preferably a carbon-nitrogen bond, by reacting a leaving group-bearing unsaturated compound and a nucleophilic compound. In particular, the invention relates to the creation of a carbon-nitrogen bond, using a method involving the arylation of nitrogenous organic derivatives; the inventive method consists in creating a carbon-heteroatom bond by reacting a leaving group-bearing unsaturated compound and a nucleophilic compound introducing a heteroatom which can be substituted for the leaving group, thereby creating a carbon-heteroatom bond, in the presence of a palladium-based catalyst, optionally a ligand. The invention is characterized in that the reaction takes place in the presence of an effective quantity of a metal hydroxide or ammonium hydroxide which is associated with an alcohol-type solvent.

Method of forming a carbon-heteroatom bond

The invention provides a method for preparing functionalized polyorganosiloxane resins (POS) comprising units M: (RSiO), Q: (SiO) and M': (YRSiO) and optionally D: (RSiO) and/or D&#x2032;: (RYSiO) and T: (RSiO) and/or T&#x2032;: (YSiO), wherein in said units R is C-C, alkyl or C-C, aryl and Y is a functional group (such as Si&#x2014;H), by redistributing POS resins, using POSf bearing functional groups M&#x2032; and/or D&#x2032; and/or in the presence of an acid catalyst such as triflic acid or one of its derivatives and a non-basic inert filler: carbon black, diatomaceous earth, zeolite or acid or neutral oxide (AlO, NaO, TiO, MgO, silica). The invention also provides said catalyst system.

Process for preparing functionalized polyorganosiloxane resins by redistribution in the presence of triflic acid and/or of at least one derivative thereof and of a nonbasic filler

The present invention relates to a process for preparing functionalized polyorganosiloxane (POS) resins comprising units M: (RSiO), Q: (SiO) and M': (YRSiO) and optionally D: (RSiO) and/or D&#x2032;: (RYSiO) and T: (RSiO) and/or T&#x2032;: (YSiO), with, in these units: R=C-Calkyl or a C-Caryl and Y a functional group (e.g.: Si&#x2014;H), by redistribution of POS resins using POSf bearing functional units M&#x2032; and/or D&#x2032; and/or in the presence of an acid catalyst of the trifluoromethane-sulfonimide (TFSI) type. The present invention also relates to the aforementioned catalyst system.

Method for preparing functionalised polyorganosiloxane resins by redistribution in the presence of at least one triflic acid derivative

The invention concerns a method for preparing polymers having at least a thiol function, comprising pyrolysis of at least a polymer having at least a function of formula (I), wherein: R1, R2, R3 and R4 are such as defined in the description 

Method for synthesis of polymers with thiol functions

An elastomeric composition usable for the manufacture of tires, based on at least (i) a diene elastomer, (ii) an inorganic filler as reinforcing filler and (iii), as (inorganic filler/diene elastomer) coupling agent, a polysilylated organosilicon compound which is at least bifunctional and can be grafted onto the elastomer by means of a sulfur group having a polythiosulfenamide function, of formula:&#x2261;Si&#x2014;A&#x2014;S&#x2014;NRR,&#x2003;&#x2003;(I)in which: The invention also concerns tires and tire treads comprising a composition of this type.

Rubber composition for a tire comprising a coupling agent having a polythiosulfenamide function

The invention concerns a radiation-curable silicone coating based on silicones having a viscosity not more than 1500 mPa's, radiation-curable, comprising: (a) at least a liquid polyorganopolysiloxane polymer Pa with viscosity higher than 500 mPa's and having at least a terminal unit of formula [Z&#x2014;Si (R)(R)&#x2014;O&#x2014;] (I), and (b) at least a polyorganopolysiloxane Pb, with viscosity less than 150 mPa's and having at least a unit of formula (I) defined above and/or at least a unit of type D of formula &#x2014;[&#x2014;(Si(R)(Z)&#x2014;O&#x2014;]&#x2014; (ii), Z being a crosslinkable and/or polymerizable group; (c) at least an efficient amount of at least an initiator consisting of onium borate.

Compositions based on radiation-curable functionalized silicones and anti-adhesive coatings obtained from same

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Lyons, France

Gérard Mignani