Heat-dissipating grease composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTakayuki Takahashi, Satoshi Kuwata
Life of this patent
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Abstract
A heat-dissipating grease composition which comprises 100 parts by weight of an organopolysiloxane and 100 to 900 parts by weight of an inorganic powder having high thermal conductivity and dispersed in the organopolysiloxane. The organopolysiloxane consists essentially of (1) 100 parts by weight of an organopolysiloxane having a viscosity of 50 to 500,000 centistokes at 25.degree. C. and (2) 1 to 300 parts by weight of an organopolysiloxane which consists essentially of R.sup.1.sub.3 SiO.sub.1/2 units and SiO.sub.2 units, wherein each R.sup.1 is a group selected from an alkyl group, an alkenyl group and an aryl group. The molar ratio between the R.sup.1.sub.3 SiO.sub.1/2 units and the SiO.sub.2 units is in the range of 0.5:1 to 2:1.
Claims7
A heat-dissipating grease composition which comprises 100 parts by weight of an organopolysiloxane and 100 to 900 parts by weight of an inorganic powder having good thermal conductivity and dispersed in the organopolysiloxane, said organopolysiloxane consisting essentially of (1) 100 parts by weight of an organopolysiloxane having a viscosity of 50 to 500,000 centistokes at 25.degree. C. and having the following average unit formula, R.sub.a SiO.sub.(r-a)/2, wherein 1.95<a<2.20 and each R is a group having from 1 to 18 carbon atoms and selected from saturated or unsaturated monovalent hydrocarbon groups and (2) 1 to 300 parts by weight of an organopolysiloxane which consists essentially of R.sup.1 dSiO.sub.1/2 units and SiO.sub.2 units, wherein each R.sup.1 is a group selected from an alkyl group, an alkenyl group and an aryl group, a molar ratio between R.sup.1.sub.3 SiO.sub.1/2 units and the SiO.sub.2 units being in the range of 0.5:1 to 2:1.
Dependencies are inferred from the claim text.