Thermally conductive silicone grease composition

A thermally conductive silicone grease composition comprising:

• (A) 100 parts by weight of an organopolysiloxane having at least two alkenyl groups in one molecule and having a kinetic viscosity of 5,000 to 100,000 mm2/s at 25° C.;
• (B) more than 50 parts to 90 parts by weight of a hydrolyzable methylpolysiloxane having a trifunctional termination at one end and represented by formula (2):
• wherein R2 represents an alkyl group having 1 to 6 carbon atoms and b is an integer of 5 to 100;
• (C) 500 to 1,500 parts by weight of a thermally conductive filler having a thermal conductivity of at least 10 W/m·° C.;
• (D) an organohydrogenpolysiloxane having from 2 to 5 hydrogen atoms directly bound to silicon atoms (Si—H groups) in such an amount that the number of Si—H groups/the number of the alkenyl groups of said component (A)=1.7 to 2.8;
• (E) 0.05 to 0.5 parts by weight of a bonding aid having a triazine ring and at least one alkenyl group in one molecule;
• and
• (F) a catalyst selected from the group consisting of platinum and a platinum compound in an amount of 0.1 to 500 ppm of a platinum atom relative to said component (A).