| 摘要 |
The polyorganosiloxane composition resulting in a silicone elastomer of high thermal conductivity, which can reach and even exceed 1.2 W/m.K, the elastomer retaining an elongation at break of greater than 30%, comprises at least one functional polyorganosiloxane which crosslinks by a polyaddition or polycondensation reaction or by the radical route, optionally a polyorganohydrosiloxane, a catalyst, optionally a reinforcing filler and a filler intended to increase the thermal conductivity which is present in the composition in the proportion of 35 to 70% by volume with respect to the total composition, this filler comprising at least two groups of particles of very different mean diameters, a first group having a mean particle diameter of between 10 and 40 mm, present in a predominant amount in the filler, and a second group having a mean particle diameter of less than 5 mm.
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