US 12,305,016 B2
Conductive rubber composition for sensing
Tomohiro Urata, Tokyo (JP)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 18/292,166
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed May 26, 2022, PCT No. PCT/JP2022/021632
§ 371(c)(1), (2) Date Jan. 25, 2024,
PCT Pub. No. WO2023/026620, PCT Pub. Date Mar. 2, 2023.
Claims priority of application No. 2021-137538 (JP), filed on Aug. 25, 2021.
Prior Publication US 2024/0336762 A1, Oct. 10, 2024
Int. Cl. C08K 3/04 (2006.01); F15B 15/10 (2006.01)
CPC C08K 3/04 (2013.01) [C08K 3/041 (2017.05); C08K 2201/001 (2013.01); F15B 15/103 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A conductive rubber composition for sensing, containing a rubber component and carbon black,
wherein the rubber component contains 80% by mass or more of acrylonitrile-butadiene rubber with an acrylonitrile unit content of more than 45% by mass,
the carbon black has a cetyltrimethylammonium bromide (CTAB) adsorption specific surface area of 110 m2/g or more,
a loss tangent (tan δ) at 1% strain is 0.6 or less, and
a hysteresis loss (Wd/Ws) at 70% elongation is 0.43 or more.