Rhone-Poulenc Chimie

Rhone-Poulenc Industries

Rhodia Chimie

Other

Rhone-Poulenc, Inc.

Rhone-Poulenc Specialites Chimiques

Rhone-Poulenc-Textile

Rhone-Poulenc Recherches

Sylvie Lavault

Michel Gay

Michel M Gay

Edith Canivenc

Gilles Mur

Gerard Lang

Serge Forestier

Herve Richard

Serge Chassaing

Christian Priou

Philippe Jost

Michel Peignier

Louis Carette

Georges Bakassian

Michel M Crochemore

Christian Pusineri

Michel Letoffe

Claude Millet

Marcel Lefort

Pierre-Michel Peccoux

Fabienne Howe

Gerard Velleret

Francoise Henrio

Fran&ccedil;oise Henrio

Philippe Chicart

Michel Allas

Francedillaoise Henrio

Jo&euml;lle Viennet

The invention concerns a compound containing calcium or magnesium acetylacetonate, at least partially coated with a compatible agent selected among alcohol's, carboxylic or sulphonic acids, or their derivatives, phosphates or titanates, &bgr;-ketone compounds; said agents having at least a long chain radical; waxes; polyols; epoxidized vegetable oils; polysiloxane oils or resins or silanes. The invention also concerns the preparation of such a compound and the use of said compound as additive in formulations based on halogenated polymers.

Coated calcium or magnesium acetylacetonate, and its use for stabilizing halogenated polymers

The invention concerns a composition comprising calcium or magnesium acetylacetonate and at least a free &bgr;-diketone and/or in the form of a metal chelate, and having a melting point at most equal to 200&deg; C. The invention also concerns the use of said composition for forming a formulation comprising at least a halogenated polymer, to prevent heterogeneity resulting from the presence of calcium or magnesium acetylacetonate, in said polymer.

Composition based on calcium of magnesium acetylacetonate and free or chelated &bgr;-diketones, preparation and use

The invention concerns the use, for increasing the durability of moulds made of silicone elastomer crosslinkable by a poly addition or polycondensation reaction, of additive capable of stabilizing the silicone elastomer constituting the mold with respect to materials to be molded, of an additive selected among: (a) antioxidant additives comprising, in their structure additives containing at least one R&mdash;S &mdash;R&prime; group in which R and R&prime; are monovalent hydrocarbon groups with at least 3 carbon atoms or a monovalent hydrocarbon group with an ester bond or R and R&prime; together form a cycle, q being a whole number between 1 and 3 inclusively, (b) additives inhibitors of free radicals capable, in moulding conditions of generating radicals &boxH;N&mdash;O; the invention concerns the synergistic combination of (a)&plus;(b), the synergistic combination of (a) and/or (b) with phosphites (c), except for the use of bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate as only additive in a silicone elastomer mould cross-linked by polycondensation.

Stabilization of silicon-elastomer moulds

The present invention relates to multifunctionalized alkoxy, the alkoxy functionality Y being introduced onto a suitable polyhydroorganosiloxane by a dehydrogenation/condensation reaction from the alcohol from which Y derives and then the functionality W by a hydrosilylation reaction from the olefinic compound form which W derives. The multifunctionalized alkoxy polyorganosiloxanes can be used as antiadhesion modulators in silicone compositions and as silica covering agents in silicone compositions containing fillers.

Functionalized polyorganosiloxanes and one of the processes for the preparation thereof

The present invention relates to multifunctionalized alkoxy, the alkoxy functionality Y being introduced onto a suitable polyhydrooorganosiloxane by a dehydrogenation/condensation reaction from the alcohol from which Y derives and then the functionality W by a hydrosilylation reaction from the olefinic compound from which W derives. The multifunctionalized alkoxy polyorganosiloxanes can be used as antiadhesion modulators in silicone compositions and as silica covering agents in silicone compositions containing fillers.

Functionalized polyorganosiloxanes and one of the processes for the

The present invention is directed to compositions containing novel beta-diketones of formula (I) and formula (II),

.beta.-diketones, processes for making .beta.-diketones and use of

Novel piperidyl organosiloxanes, well adapted for the light/UV-stabilization of a wide variety of polymer substrates, e.g., polyolefins and polyalkadienes, have the structural formula (I): ##STR1##

Piperidyl organosiloxanes and polymer substrates light-stabilized

The invention relates to compositions for chlorine-containing polymer such as PVC, including a stabilizing composition. According to the invention the stabilizing composition includes: a) the unpurified crude product resulting from the reaction of condensation of an ester with a ketone in the presence of an alkaline agent, this crude product including between 10 and 95%, preferably between 20 and 80% by weight of beta-diketone, and b) a metal acetylacetonate complex, the ratio of the constituents a/b being between 50/50 and 1/99. The invention also relates to the standard objects obtained from these compositions.

Composition for chlorine-containing polymer based on beta-diketone and

The present invention relates to a stabilizing composition for a chlorine-containing polymer (PVC), characterized in that it comprises the unpurified crude product resulting from the reaction of an ester with a ketone in the presence of an alkaline agent, this crude product comprising at least 10 % by weight of .beta.-diketone and being in the form of a powder.

Stabilizing composition for chlorine-containing polymer comprising

The present invention relates to new hydroxybenzophenones containing an ester functional group and to the use of these compounds as UV absorbers in organic polymers. More precisely, the new hydroxybenzophenones are 1,3-di(4-benzoyl-3-hydroxyphenoxy)-2-propanol carboxylates which preferably have a molecular mass of at least 500. These benzophenones can be employed as anti-UV agents in organic polymers, either by themselves or jointly with known benzophenones of lower molecular mass, such as 2-hydroxy-4-alkoxybenzophenones.

Benzophenones containing an ester functional group and their use in

Polymer matrices, e.g., halogenated polymers such as PVC, polyolefins, polystyrenes, polyalkadienes, etc., are stabilized against the adverse effects of heat and light, by incorporating therein an effective stabilizing amount of a compound of the formula (I): ##STR1## in which n is a number ranging from 1 to 3, and R is a methyl radical or a hydrogen atom.

Polymer matrices heat and light stabilized with novel

Novel compositions for stabilizing chlorinated polymers, copolymers and homopolymers comprising dawsonite, an organotin .beta.-diketonate, an organic zinc compound, and an organic calcium, magnesium, barium or lanthanide compound are disclosed. The compositions of the present invention enable the content of epoxidized oils to be decreased in chlorinated polymers while preserving thermal stability.

Compositions for stabilizing chlorinated polymers

Novel dihydropyridine compounds bearing substituted piperidyl substituents are effective heat/light stabilizers for a wide variety of polymer substrates, e.g., for halopolymers such as PVC, and are also effective anti-UV agents and antioxidants for such polymers as polyolefins, polystyrenes, polyalkadienes, polyurethanes, polyamides, polyesters, polycarbonates, polysulfones, polyethersulfones, polyetherketones, acrylic polymers, or copolymers or mixtures thereof.

Growing community of inventors

Lyon, France

Michel M Gay