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AssigneesResonac Corporation, Nissan Motor Co., Ltd.
InventorsMasamichi Mitsumoto, Yoshio Ogata, Mitsushi Oyanagi
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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.
A friction material composition comprising a bonding material comprising a silicone-containing phenolic resin, an organic filler, an inorganic filler comprising calcium hydroxide, sodium carbonate, graphite, zirconium oxide, and metal sulfide, and a fiber substrate comprising iron fiber, wherein the friction material composition comprises no copper element, or comprises less than 0.5% by mass of copper element if any,
Dependencies are inferred from the claim text.