| abstract |
An object of the present invention is an addition-curing type that can form a cured product having improved hardness, no surface tackiness, high refractive index, and particularly excellent thermal shock resistance without impairing rubber properties such as elongation. A curable silicone rubber composition and a cured product thereof are provided. SOLUTION: A. An organopolysiloxane having two or more silicon-bonded aliphatic unsaturated groups in one molecule and containing a phenyl group and / or a cyclohexyl group; An organopolysiloxane resin having a three-dimensional network structure comprising Q units and M units and having one or more phenyl groups and / or cyclohexyl groups; Organohydrogenpolysiloxanes and D.I. A platinum group metal catalyst is contained, and the B component is present in an amount of 20 to 80% by mass with respect to the total of the A to B components. In the B component, the weight in terms of standard polystyrene by GPC measurement A curable silicone rubber composition having an average molecular weight of 500 or less and a low molecular weight content of 5% or less, and a cured product thereof. [Selection figure] None |