Rhodia Operations

Rhodia Chimie

Bluestar Silicones France

Bluestar Silicones Sas

Centre National De La Recherche Scientifique-Cnrs

Elkem Silicones France Sas

Kamel Ramdani

Amit Sehgal

Bernard Vogin

Etienne Fleury

Jean-Manuel Mas

Virginie Pevere

Nathalie Guennouni

Sébastien Lomel

Christopher Plummer

Huw Evans

Thomas Deforth

Gilles Lorentz

Nicolas Durand

Nathalie Guennount

Thomas Brophy

Amanda Torres

Tamara Mamistvalova

Richard Vivier

Bernard Hendrickx

Celine Burel

Hélène Bossy

An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a cationic polysaccharide; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants, nonionic surfactants and combinations thereof. This composition when applied to a surface provides robust long lasting disinfection.

Compositions and methods for long lasting disinfection

The present disclosure provides an antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a synthetic polymer that includes: at least one cationic monomer A, optionally, at least one anionic monomer B, and optionally, at least one non-ionic monomer C; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants and combinations thereof; and at least one non-ionic surfactant selected from the group consisting of low hydrophilic-lipophilic balance (HLB) non-ionic surfactants with a delocalized electronic structure that have moderate to poor water solubility. This composition when applied to a surface demonstrates good cleaning ability and provides robust long lasting disinfection.

Long lasting disinfectant cleaning composition comprising an amne oxide/nonionic surfactant mixture

An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a synthetic polymer that includes: at least one cationic monomer A, optionally, at least one anionic monomer B, and optionally, at least one non-ionic monomer C; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants and combinations thereof, wherein the composition is free of non-ionic surfactants. This composition when applied to a surface provides robust long lasting disinfection.

The invention relates to polyorganosiloxanes containing, per molecule, at least one siloxyl unit substituted with at least one group having one or more sterically hindered piperidinyl functional groups, devoid of toxicity upon contact with the skin. The invention also relates to an improved cosmetic composition comprising the polyorganosiloxanes according to the invention and the use of these compositions for the treatment of keratin materials, in particular the skin and the hair.

Polyorganosiloxane with a piperidine function, devoid of toxicity upon contact with the skin, and use thereof in cosmetic compositions

A method for hydrolyzing/condensing, by acid catalysis, silanes bearing hydrolyzable groups, preferably halogenosilanes and more preferably still chlorosilanes, in a polyphase reaction medium (preferably biphasic), includes contacting the silanes bearing the hydrolyzable groups with water, buffer solution and neutralizing agent, while stirring, then in separating the aqueous phase from the organic phase, which contains the hydrolysis/condensation products, namely hydroxylated polyorganosiloxanes; such method is characterized by (a) employing intensively stirring means producing, in the reaction medium, an agitation at least equivalent to that induced by a shearing corresponding to that provided by a rotor whereof the peripheral speed is not less than 8 m.s, preferably not less than 10 m.s, and more preferably still ranging between 15 and 20 m.s, enabling thus organic phase droplets to be formed, of dless than 500 &#x3bc;m; and (b) ensuring that the silanes/aqueous phase mass fraction is not less than 0.05, preferably not less than 0.10, and more preferably still ranging from 0.5 to 2.0.

Synthesis of hydroxylated polyorganosiloxanes by hydrolysis/condensation of halosilanes and apparatus therefor

The invention relates to, and the general field of the invention is that of, the synthesis of silicone resins, more particularly the synthesis of silicone resins of type MQ. The process relates to the preparation of MQ silicone resins and permits better control of the operating conditions in the step of the polymerization of a sodium silicate (B) in aqueous medium in the presence of an acid (C) to form a silica hydrosol (polysilicic acid). In the course of the polycondensation step the reactants, a sodium silicate and an acid, are mixed, preferably in continuous fashion, dynamically to form a mixture (), by means of at least one intensive mixing tool (M) producing a power &#x3b5; per unit volume of more than 10 kW/m.

Process for preparing a silicone resin

The invention relates to silicon oils, more particularly, to a novel method for the preparation of a silicon oil by polymerization and rearrangement of cyclic siloxanes in the presence of an alkaline catalyst and a co-catalyst which is a cryptand (macroheterobicyclic diamine) acting as a polymerization accelerator.

Method for the preparation of organopolysiloxane by polymerization and rearrangement of cyclic siloxanes

The present invention relates to a method for preparing an omega-haloalkyl dialkylhalosilane by means of a hydrosilylation reaction in the presence of a catalytically effective amount of a hydrosilylation catalyst containing a platinum group metal. The catalytic metal is recovered by (i) subjecting the distillation residue to controlled hydrolysis to release the gaseous H-Hal haloacid, and providing an aqueous medium containing the catalytic metal with a low hydrolysable halide content Si-Hal=2%, expressed by weight of Hal, then (2i) recovering the platinum group catalytic metal from said aqueous medium by means of one of the conventional techniques specific to catalyst manufacturers that do not use a solid adsorbent and operate in ordinary facilities that do not have to be acid-resistant.

Method for preparing an &#x3c9;-haloalkyl dialkylhalosilane

The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Method of preparing organo dialkylalkoxysilane

A process for the preparation of a haloalkyldialkylchlorosilane is provided, wherein at the end of a hydrosilylation reaction, the product is recovered and iridium is recovered, the iridium being found in its original form of catalyst or in a converted form, the recovery of the iridium taking place under the following conditions a), b) and c): a) the recovery of the iridium is carried out: 1. either directly on the reaction medium at the end of the reaction, 2. or on the liquid distillation residue, including the byproducts and the iridium or its derivatives, as is obtained after distillation of the reaction medium in order to separate therefrom the product of formula (I), b) the iridium is recovered by bringing the reaction medium or the distillation residue into contact with an effective amount of carbon black which adsorbs the iridium, and c) the carbon black is separated from the iridium for the purpose of recovering the iridium.

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Lyons, France

Kamel Ramdani