Abstract: The present invention relates to organopolysiloxane compositions comprising an organopolysiloxane having, per molecule, at least two alkenyl groups, an organopolysiloxane having, per molecule, at least two SiH units, a hydrosilylation catalyst, and a thermally conductive filler, the thermally conductive filler comprising at least 40% by weigh of metallic silicon, and a specific particle size distribution. The invention further relates to a silicone elastomer which can be obtained by cross-linking and/or curing the composition, as well as its use as a thermally conductive material for coating or filling, in particular for the automotive field, in particular for the field of electric vehicles.

Abstract: Organopolysiloxane compositions are described that are crosslinkable by polyaddition and that can produce a silicone elastomer foam (or “silicone foam”) having a low density, i.e. a density of less than 0.20 g/cm3, and having good mechanical properties and a good fire resistance.