Hydrosilylation-curable silicone rubber composition

A hydrosilylation-curable silicone rubber composition comprising:

• (A) 100 parts by mass of an organopolysiloxane having an average degree of polymerization of 50 to 10000 and containing at least two alkenyl groups bonded to a silicon atom in one molecule;
• (B) 10 to 400 parts by mass of a silicone resin which includes units selected from R1SiO1/2 unit (unit M), SiO4/2 unit (unit Q), R2SiO2/2 unit (unit D), and R3SiO3/2 unit (unit T) and in which a sum of the unit M, unit Q and unit T in the whole structural units is 80% by mole or more, wherein R1, R2 and R3 are a monovalent hydrocarbon group having 1 to 6 carbon atoms, and at least two in one molecule are alkenyl groups;
• (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to a silicon atom in one molecule, in an amount in which the number of the hydrogen atoms bonded to a silicon atom per one alkenyl group bonded to a silicon atom in the component (A) and the component (B) is 1.0 to 10.0;
• (D) a rare-earth salt of a carboxylic acid represented by the formula (I) or a mixture thereof:
• (RCOO)nM (I)
• wherein R is a monovalent hydrocarbon group having 4 to 10 carbon atoms, n is a number of 3 to 4, and M is a rare-earth element selected from cerium (Ce), lanthanum (La), neodymium (Nd), praseodymium (Pr), and samarium (Sm;
• and
• (E) a hydrosilylation reaction catalyst.