Patent ID: 8618211

Claim:
A thermally conductive grease comprising: (A) a combination of polyorganosiloxanes comprising a first polyorganosiloxane of formula (I) R 1 R 2 2 Siâ€”(OSiR 2 2 ) a â€”R 3 â€”Si(OR 4 ) 3 where each R 1 is independently an alkyl group or an alkenyl group, each R 2 is independently an alkyl group, each R 3 is selected from an oxygen atom and a divalent hydrocarbon group, each R 4 is independently an alkyl group of 1 to 6 carbon atoms, and subscript a has an average value ranging from 5 to 200; a second polyorganosiloxane of formula (II) R 5 3 Siâ€”(OSiR 5 R 6 ) b (OSiR 5 2 ) c â€”R 7 â€”SiR 5 3 where each R 5 is an alkyl group, each R 6 is an aryl group, each R 7 is selected from an oxygen atom and a divalent hydrocarbon group, subscript b has an average value of at least 1, and subscript c an average value of at least 1 and with the provisos that subscript b and subscript c have average values such that a sum of (b+c) is sufficient to provide the second polyorganosiloxane with a viscosity ranging from 5 to 30,000 cSt, the amount of polyorganosiloxane of formula (II) ranges from 1% to 10% based on the combined weights of all ingredients in the grease, and the second polyorganosiloxane is compatible with the first polyorganosiloxane; and (B) a thermally conductive filler.