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1. (WO2017170560) FRICTION MATERIAL COMPOSITION

Pub. No.:    WO/2017/170560    International Application No.:    PCT/JP2017/012657
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Wed Mar 29 01:59:59 CEST 2017
IPC: C09K 3/14
F16D 69/02
Applicants: HITACHI CHEMICAL COMPANY, LTD.
日立化成株式会社
Inventors: SUN Shouqi
孫 守奇
MAGARA Akihito
真柄 暁仁
Title: FRICTION MATERIAL COMPOSITION
Abstract:
Provided is a friction material composition capable of giving friction materials which, although low in copper or copper-alloy content, have excellent fade resistance at high temperatures and give a satisfactory pedal feeling during braking. The friction material composition comprises a binder, a fibrous base, an inorganic filler, and an organic filler, and contains no copper or has a copper content of 0.5 mass or less. The inorganic filler comprises two γ-alumina powders, i.e., a first γ-alumina powder, which has a median diameter (D50) of 0.8-60 µm, and a second γ-alumina powder, which has a median diameter (D50) of 80-400 µm.