Thermal conductive grease

Abstract

A thermal conductive grease used for diffusion of heat generated in electronic appliances is provided. The thermal conductive grease comprises: (A) a base oil having a viscosity of 112 to 770 mm 2 at 40° C. and comprising a copolymer of an unsaturated dicarboxylic acid dibutyl ester and an α-olefin; and (B) a thermal conductive filler filled in the base oil. The thermal conductive grease does not include conventionally used silicone oil so that insulating substances will not be formed in the thermal conductive grease.

1 . A thermal conductive grease comprising:
 (A) a base oil having a viscosity of 112 to 770 mm 2  at 40° C. and comprising a copolymer of an unsaturated dicarboxylic acid dibutyl ester and an α-olefin; and   (B) a thermal conductive filler filled in the base oil.   
     
     
         2 . The thermal conductive grease according to  claim 1  wherein the viscosity of said copolymer at 40° C. is in a range between 112 and 340 mm 2 /s. 
     
     
         3 . The thermal conductive grease according to  claim 1  wherein said thermal conductive filler is selected from a group consisting of zinc oxide, aluminum oxide, boron nitride and combinations thereof. 
     
     
         4 . The thermal conductive grease according to  claim 1  wherein said thermal conductive filler is zinc oxide and filled in the base oil in a range between 82 and 87.5 weight percent. 
     
     
         5 . The thermal conductive grease according to  claim 1  wherein said thermal conductive filler is boron nitride and filled in the base oil at 47.6 weight percent. 
     
     
         6 . The thermal conductive grease according to  claim 1  wherein said thermal conductive filler is aluminum oxide and filled in the base oil at 87.5 weight percent.