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    • 8. 发明授权
    • Wet friction material and process for producing the same
    • 湿摩擦材料及其制造方法
    • US06331358B1
    • 2001-12-18
    • US09261203
    • 1999-03-03
    • Shun KitaharaFumimasa MuramatsuShigeki Umezawa
    • Shun KitaharaFumimasa MuramatsuShigeki Umezawa
    • B32B516
    • D21H17/59D21H17/48D21H17/52D21H25/06F16D69/026Y10T428/31663
    • A wet friction material is mainly composed of a fiber base material, a filler, an friction adjusting agent and a thermosetting resin. The wet frictional material is prepared by impregnating with a liquid thermosetting resin a paper formed by mixing a paper-forming solid thermosetting resin with a fiber base material as at least a part of filler, and then applying heat to the paper so that it is hardened. The solid thermosetting resin is preferably a phenol resin. The liquid thermosetting resin is preferably made of a silicone resin represented by the following average composition formula and the amount of trifunctional unit monomers (RSiO3/2 in which R represents a substituted or unsubstituted monovalent hydrocarbon group) in monomers constituting said silicone resin is from 40 to 100 mol-%: (R1)a(OR2)bSiO(4−a−b)/2.
    • 湿摩擦材料主要由纤维基材,填料,摩擦调节剂和热固性树脂组成。 湿摩擦材料通过用液体热固性树脂浸渍通过将形成纸的固体热固性树脂与作为填料的至少一部分的纤维基材混合形成的纸,然后向纸施加热量使其硬化而形成的纸 。 固体热固性树脂优选为酚醛树脂。 液态热固性树脂优选由以下平均组成式表示的硅树脂制成,构成所述有机硅树脂的单体中的三官能单元单元(其中R表示取代或未取代的单价烃基的RSiO3 / 2)的量为40 至100mol%: