| 摘要 |
The present invention provides a heat curable silicone rubber composition which inhibits precipitation of an inorganic filler upon storage and exhibits a good stability. In details, it is a heat curable silicone rubber composition being in a liquid state at room temperature includes: (A) 20 to 80 parts by mass of organopolysiloxane containing an alkenyl group bonded to at least two silicon atoms in a molecule, (B) 20 to 80 parts by mass of organopolysiloxane wherein 0.1 or more and less than two alkenyl group bonded to silicon atoms are present inamolecule on average, the remaining organic groups bonded to silicon atoms are substituted or unsubstituted monovalent hydrocarbon groups not containing an aliphatic unsaturated bond, and a viscosity at 23°C is 0.05 to 100 Pa·s, the total amount of Components (A) and (B) being 100 parts by mass, (C) organohydrogen polysiloxane containing hydrogen atoms bonded to at least two silicon atoms in a molecule, the amount of hydrogen atoms bonded to silicon atoms in Component (C) being 0.1 to 10 mol relative to 1 mol of alkenyl groups in Components (A) and (B), (D) 5 to 500 parts by mass of an inorganic filler and (E) a catalytic amount of addition reaction catalyst. |
