| 摘要 |
PROBLEM TO BE SOLVED: To provide a silicone rubber composition giving a cured product excellent in dynamic fatigue durability, and to provide a silicone rubber molded article produced by curing the composition.SOLUTION: A silicone rubber composition comprises (A) 100 pts.mass of an organopolysiloxane whose polymerization degree represented by average composition (I): RSiO(wherein, Ris an identical or different non-substituted or substituted monovalent hydrocarbon group; (a) is a positive number of 1.95-2.05) is ≥100, (B) 5-70 pts.mass of reinforcing silica having a specific surface area of ≥50 m/g by BET adsorption method, (C) 0.01-10 pts.mass of an alkenyl group-having silane compound represented by general formula (II): CH=CHCHCHCHCHSi(OR)(wherein, Ris an identical or different monovalent hydrocarbon group, or H), and (D) an effective amount of a curing agent. A silicone rubber cured product (molded article) excellent in dynamic fatigue durability can be obtained. |
