Patent ID: 7510998
Filing Date: 2009-03-31
Classification: C08L,C10M,C10N

Abstract:
1. A silicone grease composition comprising (A) 2 to 40% by weight of an organopolysiloxane of the average compositional formula (1): wherein R 1 is independently a monovalent C 1 -C 18 hydrocarbon group, and “a” is a positive number from 1.8 to 2.2, having a kinematic viscosity of 50 to 500,000 mm 2 /s at 25° C., and (B) 60 to 98% by weight of at least one heat conductive filler selected from the group consisting of metal powders, metal oxide powders and ceramic powders, the filler having a thermal conductivity of at least 10 W/m° C. and an average particle size of 0.1 to 15.0 μm, wherein a fraction of coarse particles on 500 mesh (sieve opening 25 μm) is not more than 50 ppm based on said composition and a fraction of coarse particles on 325 mesh (sieve opening 45 μm) is substantially zero.