Patent ID: 7429418

Claim:
A friction material consisting essentially of a porous base material, at least one resin material, and nanoparticle-sized friction modifying particles dispersed within the porous base material, wherein the nanoparticle-sized friction modifying particles are randomly dispersed within the friction material, wherein the nanoparticle-sized friction modifying particles are deposited on individual fibers and fillers comprising the porous base material at a thickness of about 0 to about 85 μm, wherein the friction material has substantially the same permeability in the radial direction and in the normal direction, wherein the nanoparticle-sized friction modifying particles have an average diameter size from about 10 nm to about 150 nm, wherein the porous base material has an average voids volume from about 65% to about 85%; and wherein the nanoparticle-sized friction modifying particles have an irregular shape.