Patent ID: 6372337
Filing Date: 2002-04-16
Classification: C10M,C10N,H01L,Y10T

Abstract:
A thermally conductive grease composition comprising (A) 100 parts by weight of a base oil wherein said base oil is at least one oil of a liquid silicone, a liquid hydrocarbon or a fluorinated hydrocarbon oil wherein said fluorinated hydrocarbon oil is at least one oil selected from a polychlorotrifluoroethylene, a fluoroester or a polyperfluoroalkyl ether, (B) 500 to 1,200 parts by weight of metallic aluminum powder having the average particle size in the range of 0.5-50 &mgr;m and (C) zinc oxide powder having an average particle size in the range of 0.2-5 &mgr;m or hexagonal boron nitride powder having an average particle size in the range of 1-5 &mgr;m, wherein said aluminum powder is a 9:1 to 1:9 by weight mixture of fine metallic aluminum powder having an average particle size of 0.5 to 5 &mgr;m and coarse metallic aluminum powder having an average particle size of 10 to 40 &mgr;m, and said Components (B) and (C) are contained in a total amount of 900-1416 parts by weight per 100 parts by weight of said base oil and in proportion satisfying a relation that the (C)/[(B)+(C)] ratio is not greater than 0.5 by weight.