| 摘要 |
A silicone grease composition having high thermal conductivity, comprising (A) 50 to 95 weight % of a mixture of an aluminum nitride powder alpha having an average particle size of 0.5 to 5 mum and an aluminum nitride powder beta having an average particle size of 6 to 20 mum, wherein the aluminum nitride powders alpha and beta are mixed so that the alpha/(alpha+beta) ratio by weight is from 0.1 to 0.9 and the average particle size after mixing is from 1 to 10 mum, (B) 5 to 15 weight % of organopolysiloxanes having a viscosity of from 50 to 50,000 cs at 25° C. and represented by formula R1aSiO(4-a)/2, wherein R1 represents at least one group selected from saturated or unsaturated univalent hydrocarbon groups containing 1 to 18 carbon atoms and 1.8<=a<=2.2, and (C) 0 to 35 weight % of at least one inorganic compound powder having an average particle size of 0.5 to 100 mum selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders.
|
