Seal rubber composition and sealing member
AssigneesKoyo Sealing Techno Co., Ltd., Jtekt Corporation
InventorsKatsuhiko Kusunoki, Fumiaki Kasahara
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Abstract
A seal rubber composition contains a carboxyl group-containing acrylic rubber, silica, and two or more inorganic fibers, an amount of the silica per 100 parts by weight of the carboxyl group-containing acrylic rubber is 25 to 100 parts by weight, and a total amount of the inorganic fibers per 100 parts by weight of the carboxyl group-containing acrylic rubber is 35 to 100 parts by weight. A sealing member includes a sliding portion composed of a vulcanized product of the seal rubber composition.
Claims5
A seal rubber composition containing a carboxyl group-containing acrylic rubber, silica, and two or more inorganic fibers, wherein
- an amount of the silica per 100 parts by weight of the carboxyl group-containing acrylic rubber is 25 to 100 parts by weight,
- a total amount of the inorganic fibers per 100 parts by weight of the carboxyl group-containing acrylic rubber is 35 to 90 parts by weight,
- at least glass fiber and calcium silicate fiber are contained as the inorganic fibers,
- an amount of the glass fiber per 100 parts by weight of the carboxyl group-containing acrylic rubber is 5 to 20 parts by weight, and
- an amount of the calcium silicate fiber per 100 parts by weight of the carboxyl group-containing acrylic rubber is 30 to 70 parts by weight.
Dependencies are inferred from the claim text.