| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a silicone rubber composition yielding a cured product excellent in dynamic fatigue durability, and to enable the same to be suitably used for manufacturing a keypad. Ž<P>SOLUTION: The silicone rubber composition comprises (A) a 100 pts.mass organopolysiloxane represented by average composition formula (I): R<SP>1</SP><SB>a</SB>SiO<SB>(4-a)/2</SB>(wherein R<SP>1</SP>s are the same or different (non)substituted monovalent hydrocarbon groups; and a is a positive number of 1.95-2.05) and having a degree of polymerization of ≥100, (B) 3-70 pts.mass reinforcing silica having a BET specific surface area of ≥50 m<SP>2</SP>/g, (C) a 0.001-1 pts.mass chlorine-substituted phosphate represented by formula (II): (R<SP>2</SP>O)<SB>3</SB>PO (wherein R<SP>2</SP>s are the same or different chlorine-substituted monovalent hydrocarbon groups) and (D) an effective amount of a hardener. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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