| 摘要 |
A heat curable liquid silicone rubber composition with good hydrocarbon oil resistance comprises: (A) a first vinyl-containing polydiorganosiloxane that is vinyldiorganosiloxy terminated, having a viscosity of from 20 to 200 Pa.s at 25 DEG C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms, (B) a second vinyl-containing polydiorganosiloxane that is either vinyldiorganosiloxy terminated or triorganosiloxy terminated, miscible with the first polydiorganosiloxane and having a viscosity of from about 0.1 to 200 Pa.s at 25 DEG C. where from 1 to 5 mole percent of the non-terminal silicon atoms of the second vinyl-containing polydiorganosiloxane have a vinyl radical bonded thereto, (C) an organohydrogensiloxane resin miscible with (A) and (B) containing an average of more than five silicon bonded hydrogen atoms per molecule, (D) a platinum group hydrosilation catalyst, (E) a reinforcing silica filler, (F) an alkaline earth metal oxide acid acceptor or an alkaline earth metal hydroxide acid acceptor, and (G) an optional adhesion promoter.
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