	US 12,228,187 B2
	Friction material composition, friction material and friction member
Masamichi Mitsumoto, Tokyo (JP); Yoshio Ogata, Atsugi (JP); and Mitsushi Oyanagi, Atsugi (JP)
Assigned to RESONAC CORPORATION, Tokyo (JP); and NISSAN MOTOR CO., LTD., Kanagawa (JP)
Appl. No. 17/310,255
Filed by Showa Denko Materials Co., Ltd., Tokyo (JP); and NISSAN MOTOR CO., LTD., Kanagawa (JP)
PCT Filed Jan. 28, 2020, PCT No. PCT/JP2020/002986 § 371(c)(1), (2) Date Jul. 27, 2021, PCT Pub. No. WO2020/158735, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-012381 (JP), filed on Jan. 28, 2019.
Prior Publication US 2024/0026944 A1, Jan. 25, 2024
Int. Cl. F16D 69/02 (2006.01); F16D 69/04 (2006.01)

CPC F16D 69/026 (2013.01) [F16D 2069/0466 (2013.01); F16D 2200/0008 (2013.01); F16D 2200/0052 (2013.01); F16D 2200/0065 (2013.01)]

19 Claims

1. A friction material composition comprising a bonding material comprising a silicone-containing phenolic resin, an organic filler, an inorganic filler comprising calcium hydroxide, sodium carbonate, graphite, zirconium oxide, and metal sulfide, and a fiber substrate comprising iron fiber, wherein the friction material composition comprises no copper element, or comprises less than 0.5% by mass of copper element if any,

comprises no antimony element,

comprises iron fiber and the content thereof is 5% by mass or less,

comprises 1 to 5% by mass of zinc powder,

comprises 2.5 to 6% by mass of calcium hydroxide,

comprises 0.7 to 1.5% by mass of sodium carbonate,

comprises 5 to 20% by mass of silicone-containing phenolic resin,

comprises 0.5 to 20% by mass of graphite,

comprises 5 to 20% by mass of zirconium oxide, and

comprises 0.1 to 10% by mass of metal sulfide,

wherein a content of the organic filler is 1 to 20 mass % and a content of the fiber substrate is 5 to 40 mass %.