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|1. (WO2017170532) IRON OXIDE PARTICLE POWDER FOR FRICTION MATERIAL|
|Applicants:||TODA KOGYO CORP.
|Title:||IRON OXIDE PARTICLE POWDER FOR FRICTION MATERIAL|
The present invention relates to a friction material used mainly for resin type brake pads formed by resin molding, and provides an iron oxide particle powder for friction materials, the iron oxide particle powder having excellent abrasive properties, good outgassing performance, excellent mechanical strength such that improved dispersion in resin can be expected, and a large specific surface area. The iron oxide particle powder for friction materials is characterized in that a magnetite crystal phase is a major component, primary particles have a needle-like shape, agglomerated particles have an average particle size of 10 to 150 μm, and in that the iron oxide particle powder includes 0.01 to 2.0 wt% of a heterogeneous element.