US 5,399,602 A · Oil-resistant silicone rubber composition

Abstract

The composition of the present invention comprises an oil-resistant silicone rubber composition that undergoes little swelling even when used in regular or continuous contact with mineral oil-based lubricating oil such as engine oil and so forth. The oil-resistant silicone rubber composition comprises: (A) a dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum that contains 0.001 to 5 mole percent methylvinylsiloxane unit, (B) a hydrocarbon oil or diorganopolysiloxane oil wherein the total in each diorganopolysiloxane oil molecule of the number of silicon-bonded hydrogen atoms and the number of functional groups reactive with component (A) or (C) is less than two, (C) a reinforcing filler, and (D) a curing agent in a quantity sufficient to cure the composition.

Claims8

Dependent claims

An oil-resistant silicone rubber composition, comprising:

(A) 100 weight parts dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum containing methylvinylsiloxane units in a range of about 0.001 to 5 mole percent,
(B) 1 to 80 weight parts of a diorganopolysiloxane oil per 100 weight parts of component (A), wherein the total in each molecule of the diorganopolysiloxane oil of the number of silicon-bonded hydrogen atoms and the number of functional groups that are reactive with component (A) or (C) is less than two,
(C) 10 to 100 weight parts reinforcing filler per 100 weight parts of component (A), and
(D) a curing agent in a quantity sufficient to cure the composition.

1 more element

Dependencies are inferred from the claim text.

Oil-resistant silicone rubber composition

Life of this patent

Oil-resistant silicone rubber composition

Life of this patent

Abstract

Claims8