Rubber composition and rubber sealing device
AssigneeNsk Ltd.
InventorsToshikazu Yabe, Takahiko Uchiyama, Nariaki Aihara, Keisuke Yokoyama
Life of this patent
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Abstract
A rubber composition containing a tetrafluoroethylene-propylene bipolymer and from 0.02 to 10 parts by weight of a liquid polybutadiene per 100 parts by weight of the tetrafluoroethylene-propylene bipolymer and a rubber sealing device in which the rubber composition is joined to a reinforcing member are described, by which long-life rubber sealing devices which are highly tolerant to liquids containing amine-based additives, for example, soluble-type synthetic cutting coolants and engine oils suitable for high-speed processing and can sustain favorable sealing performance over a long period of time and rubber compositions appropriate therefor are provided.
Claims18
A rubber composition to be joined to a reinforcing member of a rubber sealing device which comprises a tetrafluoroethylene-propylene bipolymer and from 0.02 to 10 parts by weight of a liquid polybutadiene per 100 parts by weight of the tetrafluoroethylene-propylene bipolymer.
A rubber sealing device comprising a reinforcing member and a rubber composition joined thereto, wherein said rubber composition comprises a tetrafluoroethylene-propylene bipolymer and from 0.02 to 10 parts by weight of a liquid polybutadiene per 100 parts by weight of the tetrafluoroethylene-propylene bipolymer.
Dependencies are inferred from the claim text.