Rhodia Chimie

Bluestar Silicones France Sas

Bluestar Silicones France

Rémi Thiria

Alain Pouchelon

Sébastien Sterin

Catherine George

Delphine Blanc-Magnard

A polyorganosiloxane composition that can be vulcanized at high temperature to a silicone elastomer, useful in the field of the manufacture of electrical wires or cables having an improved fire performance is provided. The composition includes a semi-reinforcing filler chosen from the group composed of:&#x2014;calcined kaolin powders, preferably that have undergone a chemical surface treatment;&#x2014;talc;&#x2014;calcium carbonate that may or may not have been surface-treated, for example with vinylsilanes, aminosilanes or (reactive or unreactive) silicone oils; and mixtures thereof.

Hot-vulcanizable polyorganosiloxane compositions useful particularly for manufacturing electrical cables or wires

This invention is directed to stabilizing additives that contain at least one platinum complex, with the complex including a carbene group. The stabilizing additives make it possible to improve the resistance to decomposition of silicone elastomers under high temperatures. The additive can be used in a polyorganosiloxane composition intended for the production of a silicone elastomer with either crosslinks at high temperature under the action of organic peroxides or crosslinks at ambient temperature or with heat by polyaddition reactions in the presence of a metal catalyst.

Use of a specific platinum compound in order to improve the resistance of silicon elastomers to degredation caused by very high temperatures

Process for preparing catalyst assemblies by mixing a metal catalyst capable of catalyzing a hydrosilylation reaction and an organophosphorus inhibitor of the formula (I) or of formula (VIII) P(OR), either by mixing the inhibitor into a solution of catalyst in an unsaturated silane or siloxane or by mixing the inhibitor into a gum or oil at a temperature greater than the melting temperature or softening temperature of the organophosphorus compound, then mixing the catalyst. Catalyst assemblies, process for preparing one-component silicone compositions, and resultant compositions.

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Lyons, France

Rémi Thiria