WET FRICTION MATERIAL AND WET FRICTION PLATE INCLUDING WET FRICTION MATERIAL

• Main Authors: MATSUMOTO MAKOTO, TAKABAYASHI HIDEAKI, OKADA RYO, TORITANI RITSUO, SUZUKI MISAKO, ISO KENICHI, SAITO KENJI
• Format: Patent
• Language: English; Japanese
• Published: 21.02.2024
• Subjects: ADHESIVES; BLASTING; BRAKES; CHEMISTRY; CLUTCHES; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COUPLINGS FOR TRANSMITTING ROTATION; DYES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a wet friction material used for a wet clutch or a wet brake, which can improve heat resistance durability of the wet friction material itself and suppress swelling in oil.SOLUTION: A wet friction material 19 includes a base material paper formed by using a fiber base material and a filler, and a binder for hardening the base material paper, wherein the binder is an epoxy-modified silicone resin composed of a component (A) and a component (B) shown below. (A) an organosilicon compound represented by the following average composition formula (1): R1aSi(OR2)bO(4-a-b)/2(1) [In the formula, R1 is a substituted or unsubstituted monovalent hydrocarbon group, R2 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, and constants a, b satisfy 0≤a<3, 0.001≤b≤4, and a+b≤4.] (B) an epoxy compound having one or more epoxy groups and one or more hydroxyl groups in one molecule.SELECTED DRAWING: Figure 2 【課題】湿式クラッチ或いは湿式ブレーキに用いられる湿式摩擦材であって、湿式摩擦材自体の耐熱耐久性の向上が図られると共に、油中での膨潤を抑制することが可能な湿式摩擦材を提供する。【解決手段】繊維基材と充填剤とを用いて形成された基材ペーパーと、基材ペーパーを硬化させるための結合材とを含む湿式摩擦材１９であって、結合材は、下記に示す成分（Ａ）と成分（Ｂ）とからなるエポキシ変性シリコーン樹脂である。（Ａ）以下の平均組成式（１）で表される有機ケイ素化合物Ｒ１ａＳｉ（ＯＲ２）ｂＯ（４－ａ－ｂ）／２（１）［式中、Ｒ１は１価の炭化水素基の置換または非置換、Ｒ２は水素または１価の炭化水素基の置換または非置換、定数ａ、ｂは０≦ａ＜３、０．００１≦ｂ≦４、ａ＋ｂ≦４である。］（Ｂ）１分子中に１個以上のエポキシ基と１個以上の水酸基を有するエポキシ化合物【選択図】図２