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https://drivepatents.com/patents/1081404 · 22 Dec 2004
There are disclosed a friction material composition which comprises a fibrous material except for asbestos, an inorganic friction regulator, an organic friction regulator and a binder, part of the inorganic friction regulator is alpha alumina and gamma alu...
https://drivepatents.com/patents/1081927 · 1 Dec 2004
A friction material prepared by molding and curing a composition containing a fibrous base, a binder and a filler comprises three types of metal oxides having Mohs hardness of 4 to 6.5 in a combined amount of at least 12 vol%.