Friction material composition, friction material, and friction member

    公开(公告)号:US11649869B2

    公开(公告)日:2023-05-16

    申请号:US16491195

    申请日:2017-03-06

    IPC分类号: F16D69/02 F16D65/04

    摘要: There are provided a friction material composition containing no copper or having a reduced content of copper that can provide a friction material in which the stability of the friction coefficient after standing in a cold environment, the abrasion resistance, and the low rust fixation properties are excellent, and squeal (particularly low temperature squeal) is suppressed, and a friction material obtained by molding the friction material composition, and a friction member using the friction material. The friction material composition is specifically a friction material composition comprising a bonding material, an organic filler, an inorganic filler, and a fiber substrate, in which the friction material composition comprises no copper, or has a content of copper of less than 0.5% by mass in terms of a copper element even if comprising the copper, and comprises, as the organic filler, cashew particles to which a silicone resin adheres.

    CHEMICALLY ACTIVATED FRICTION MATERIAL
    5.
    发明申请

    公开(公告)号:US20180209502A1

    公开(公告)日:2018-07-26

    申请号:US15745622

    申请日:2015-08-13

    IPC分类号: F16D69/02 F16D13/60

    摘要: A friction material for a clutch or brake, including: a first surface facing in a first direction; a second surface facing a second direction, opposite the first direction; and a body portion sandwiched between the first and second surfaces. The body and the first and second surfaces include fiber material and filler material. The filler material for the first surface includes Si—OH (silanol) and Si—O—Na+ species. A torque converter including a torque converter clutch including: friction material including Si—OH (silanol) and Si—O—Na+ species; and a piston displaceable to engage the friction material with the piston and a cover to transmit torque from the cover to an output hub through the friction material and piston. A method of chemically activating friction material for a clutch or brake, including: exposing friction material, including filler material with Si—O—Si (siloxane), to NaOH (sodium hydroxide); and forming, from the Si—O—Si (siloxane), Si—OH (silanol).

    ALKALI-METAL TITANATE AND FRICTION MATERIAL
    6.
    发明申请

    公开(公告)号:US20180163805A1

    公开(公告)日:2018-06-14

    申请号:US15578806

    申请日:2016-04-28

    IPC分类号: F16D69/02 C01G23/00

    摘要: Provided is an alkali-metal titanate in which the content and adhesivity of the fibrous potassium titanate is significantly reduced.The alkali-metal titanate includes 0.5 mol to 2.2 mol of potassium oxide in terms of potassium atoms, 0.05 mol to 1.4 mol of sodium oxide in terms of sodium atoms, and 0 mol to 1.4 mol of lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate, in which a total content of potassium oxide in terms of potassium atoms, sodium oxide in terms of sodium atoms, and lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate is 1.8 mol to 2.3 mol; and the alkali-metal titanate has a single phase conversion ratio of 85% to 100%, a fiber ratio of 0% by volume to 10% by volume, and a moisture content of 0% by mass to 1.0% by mass.

    NON-ASBESTOS FRICTION MATERIAL COMPOSITION, FRICTION MATERIAL USING SAME, AND FRICTION MEMBER

    公开(公告)号:US20180112730A1

    公开(公告)日:2018-04-26

    申请号:US15838870

    申请日:2017-12-12

    IPC分类号: F16D65/092 F16D69/02

    摘要: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with low environmental load and with excellent friction coefficient, anti-crack properties, and abrasion resistance compared with conventional ones. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material, includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 1.5-4.5 mass % as the organic filler; zirconium oxide with a particle size of 30 μm or less in a content of 30-45 mass % but not containing zirconium oxide with a particle size of more than 30 μm as the inorganic filler.