| abstract |
The present invention relates to (A) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups in a molecule, (B) a filler comprising an aluminum powder and a zinc oxide powder, (C) a filler comprising two or more (D) a platinum group metal catalyst; and (D) a catalyst containing a platinum group metal catalyst at 25 ° C to 125 ° C at 10 ° C / min, 125 ° C to 145 ° C at 2 ° C / The temperature of the sample was measured at a temperature of 150 ° C for 7,200 seconds to measure a storage modulus G 'of the sample. A cured product having a storage elastic modulus after 3,600 seconds and a storage modulus after 7,200 seconds of 0.7 or less Based on the total weight of the composition. Thereby, a silicone composition capable of compressing the heat dissipating grease to a predetermined thickness after the reflow step which is exposed to a high temperature of 200 占 폚 or more and sufficiently spreading the applied heat dissipating grease over the entire heat generating portion is provided. |