Showa Denko Materials Co., Ltd.

Nissan Motor Company Limited

Resonac Corporation

Masamichi Mitsumoto

Yoshio Ogata

Mitsushi Oyanagi

To provide a friction material composition which provides a friction material having high friction coefficient during high speed and high temperature braking, high coefficient of static friction and excellent abrasion resistance at high temperature and causing little sticking due to rust, even when the composition includes no antimony element or no copper element, or includes less than 0.5% by mass of copper element if any, in other words even when having a composition environmentally less harmful or less harmful to the human body. More specifically the friction material composition includes a bonding material, an organic filler, an inorganic filler and a fiber substrate, wherein the friction material composition includes no copper element, or includes less than 0.5% by mass of copper element if any, includes no antimony element, includes 5% by mass or less of iron fiber, 1 to 5% by mass of zinc powder, 2.5 to 6% by mass of calcium hydroxide, 0.7 to 1.5% by mass of sodium carbonate and a silicone-containing phenolic resin.

Friction material composition, friction material and friction member

A friction material composition containing a binder, an organic filler, an inorganic filler and a fibrous base material, wherein the friction material composition either contains no copper as an element or has a content of copper as an element that does not exceed 0.5% by mass, contains &#x3b1;-alumina and &#x3b3;-alumina in a mass ratio within a range from 1:20 to 1:5, contains a silicone-containing phenol resin, contains 20 to 35% by mass of a titanate salt, contains 3 to 7% by mass of a graphite having a median diameter of 1 to 30 &#x3bc;m, and contains antimony trisulfide.

Friction material composition, and friction material and friction member each obtained using friction material composition

The present invention is concerned with a frictional material composition not containing copper as an element or having the content of copper of 0.5 mass % or less, the composition containing

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Tokyo, Japan

Masamichi Mitsumoto