The invention discloses oil-resistant fluorinated
silicone rubber which is prepared by the following raw materials in parts by weight: 100 parts of fluorinated
silicone rubber, 3-15 parts of
carbon black, 30-100 parts of modified
alumina powder, 0.01-0.05 parts of internal releasing agent, and 0.5-3 parts of vulcanizing agent. According to the oil-resistant fluorinated
silicone rubber, the
carbon black serves as a reinforcing agent and substitutes the traditional white
carbon black and structural control agent
system, and heat treatment is not required in a mixing process, so that a technology is simplified greatly, the lost is lowered, and a quality unstabilizing factor is reduced. The
alumina powder subjected to coconut
fatty acid surface treatment is adopted, and the surface of
alumina changes from hydrophilicity to hydrophobicity, so that the
dispersity and the compatibility of alumina in the fluorinated
silicone rubber are improved effectively; alumina occupies the original space of a rubber matrix molecular chain, so that a rubber molecular
chain segment is immobilized to some extent; and movement of a molecular chain in a
polymer boundary zone is limited and the rubber molecular
chain segment cannot be sufficiently contacted with an oil material, so that the oil resistance of vulcanized rubber is improved greatly.