Elf Atochem S.a.

Atochem

Atofina

Evelyne Bonnet

Jean-Jacques Flat

Bernard Jean Gurtner

Andre Gagnieur

Maxime Deroch

Helene Egret

Francois Tilquin

Laurent Martin

Jacques Fontela

The invention relates to the use of a thermally insulating composition in the form of crosslinked polyurethane elastomer gel, obtained by reacting at least one polyol and at least one polyisocyanate in the presence of at least one inert organic filler, for the thermal insulation of pipeline systems present in a product-transfer conduit.

Polyurethane elastomer gel insulating composition and use thereof

The invention relates to a coated metal surface including, successive, at least one layer of polyurethane and at least one layer of thermoplastic polymer, it being possible for a binder to be placed between the polyurethane and the thermoplastic polymer. The invention is useful for covering pipers, electrical cables, telecommunication cables and stay wires.

Coating of metal surfaces, its application to tubes and to cables

The invention relates to a coated metal surface including successively, starting at the metal, at least one layer of polyurethane and at least one layer of thermoplastic polymer, it being possible for a binder to be placed between the polyurethane and the thermoplastic polymer. It is useful for covering pipes, electrical cables, telecommunication cables and stay wires.

The invention relates to fibers coated with a hydrophobic material based on an epoxidized polydiene oligomer. This coating results from the photopolymerization of a composition comprising at least one expoxidized polydiene oligomer, at least one photoinitiator salt and optionally a reactive diluent. The invention relates in particular to optical fibers.

Fibres coated with a hydrophobic material

The invention relates to the preparation of halogenated imides derived from hydrazine, a halogen and a dicarboxylic acid anhydride and capable of being employed as fireproofing agents for plastics. A dicarboxylic acid anhydride is halogenated with bromine, chlorine or a mixture thereof and then the product thus obtained is subsequently reacted with hydrazine. No prior purification or isolation of the intermediate halogenated anhydride is required.

Process for the preparation of flame-resistant halogenated imide

The invention relates to a polyol-based plasticized composition which includes a sufficient quantity of a thickening additive to obtain a viscosity at 20.degree. C. of at least 4 Pa.cndot.s. This plasticized composition can be employed for obtaining a polyurethane gel.

Polyol-based plasticized composition which has a controlled viscosity

The invention relates to the preparation of halogenated imides derived from hydrazine and halogenated dicarboxylic acid anhydride and which can be used as flameproofing agents for plastics. The condensation of hydrazine and halogenated dicarboxylic acid anhydride is carried out in an aqueous medium, at a temperature ranging from 40.degree. to 225.degree. C., with a molar ratio of anhydride/hydrazine equal to between 0.5 and 3, preferably between 1 and 2.

Preparation of flame-resistant halogenated imides

The invention relates to the preparation of halogenated imides derived from hydrazine and halogenated dicarboxylic acid anhydride and which can be used as flameproofing agents for plastics. The condensation of hydrazine and halogenated dicarboxylic acid anhydride is carried out in an aqueous medium, at a temperature ranging from 40.degree. to 225.degree. C., with a molar ratio of anhydride/hydrazine substantially equal to 2.

Flame resistant compositions and method of using same

A stable homogeneous composition in the form of a microemulsion suitable for making rigid foams comprising a halogenated polyhydroxylated compound, a halogenated alkane, and a surfactant in an amount sufficient to maintain a stable microemulsion.

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Lamorlaye, France

Evelyne Bonnet