| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermocurable silicone rubber composition which is reduced in the sedimentation of an inorganic filler contained therein during storage and therefore has good stability. SOLUTION: The thermocurable silicone rubber composition contains: (A) 20 to 80 pts.mass of an organopolysiloxane having at least two silicon-atom-binding alkenyl groups in its molecule; (B) 20-80 pts.mass of an organopolysiloxane which has not less than 0.1 and less than 2 (on average) silicon-atom-binding alkenyl groups in its molecule, in which each of the organic groups other than the silicon-atom-binding alkenyl groups is a substituted or unsubstituted univalent hydrocarbon group having no aliphatic unsaturated bond, and which has viscosity of 0.05 to 100 Pa s at 23°C (provided that the total amount of the components (A) and (B) is 100 pts.mass); (C) an organohydrogenpolysiloxane having at least two silicon-atom-binding hydrogen atoms in its molecule, in such an amount that the amount of the silicon-atom-binding hydrogen atoms in the component (C) becomes 0.1 to 10 moles per mole of the alkenyl groups contained in the components (A) and (B); (D) 5 to 500 pts.mass of an inorganic filler; and (E) an addition reaction catalyst in a catalytic amount. The thermocurable silicone rubber composition has a liquid form at room temperature. COPYRIGHT: (C)2009,JPO&INPIT |
