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US 10,377,932 B2Granted
Sealing rubber composition and seal member
AssigneesJtekt Corporation, Koyo Sealing Techno Co., Ltd.
InventorsTakeshi Kawabayashi, Fumiaki Kasahara, Katsuhiko Kusunoki
Life of this patent
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Abstract
A sealing rubber composition includes acrylic rubber, artificial graphite, and coupling agent.
Claims2
A sealing rubber composition for forming a sliding surface of a seal member for sliding against another member, comprising:
- 100 parts by mass of a carboxylated acrylic rubber;
- 5 to 40 parts by mass of an artificial graphite formed by firing a coke and graphitizing the coke at a temperature of 2500° C. or higher, the artificial graphite being in the form of particles having an average overall particle size of 5 μm to 50 μm;
- and
- 0.5 to 5 parts by mass of an epoxy silane coupling agent for aiding in bonding the acrylic rubber to the artificial graphite particles,
- wherein the artificial graphite particles form friction reducing protrusions for protruding from the sliding surface of the seal member and for contacting the another member.
2 more elements
Dependencies are inferred from the claim text.