| 摘要 |
PROBLEM TO BE SOLVED: To provide a silicone rubber composition for injection molding that gives a silicone rubber cured product that is highly transparent, exhibits excellent injection moldability and has a high hardness and a high elongation. SOLUTION: The silicone rubber composition comprises an organopolysiloxane mixture having an average polymerization degree of 1,000-3,000 obtained by mixing (A) an organopolysiloxane represented by average compositional formula (1) below and having a polymerization degree of 500-1,500 with (B) an organopolysiloxane represented by average compositional formula (1) below having a polymerization degree of at least 3,000 at a weight ratio of (A):(B) of 5:95 to 95:5, (C) an organopolysiloxane resin, (D) an organohydrogenpolysiloxane and (E) a platinum catalyst. R<SB>a</SB>SiO<SB>(4-a)/2</SB>(1) (wherein R is a substituted or unsubstituted monovalent hydrocarbon group; and a is a positive number of 1.95-2.05). COPYRIGHT: (C)2008,JPO&INPIT |
