| abstract |
(57) [Summary] (Modified) [Solution] (1) Average composition formula (1) below (Where R 1 is a trifluoropropyl group, R 2 is a monovalent aliphatic unsaturated hydrocarbon group, R 3 is a monovalent hydrocarbon group having no aliphatic unsaturated bond, a is 0.98 to 1.01, b is 0.0001 to 0.01, c is 0.98 to 1.01, a + B + c is a number from 1.98 to 2.02. ) Organopolysiloxane represented by 100 parts by weight (2) finely divided silica-based filler 5 to 100 parts by weight (3) an organopolysiloxane represented by the following general formula (2) 0.5 to 20 parts by weight (Where R 4 to R 6 are the same or different monovalent hydrocarbon groups having no aliphatic unsaturated bond, p = 0 to 50, q = 4 to 1) 00, p + q = 4 to 100, q / (p + q) ≧ 0.7. (4) A fluorosilicone rubber composition comprising a curing agent. [Effect] A fluorosilicone rubber having reduced mechanical swelling when immersed in fuel oil and having good mechanical strength is provided. |