Friction material, in particular for the manufacturing of a brake pad, and associated preparation method
AssigneeITT Italia S.r.l.
InventorsAgustin Sin Xicola, Luca Martinotto, Paolo Galimberti
Life of this patent
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Abstract
An asbestos-free friction material includes inorganic and/or organic and/or metallic fibers, at least one binder, at least one friction modifier or lubricant, at least one filler or abrasive and a carbonaceous material constituted by a microstructure. The microstructure is in the form of flakes or scales of micrometric planar dimensions and of nanometric thickness consisting of a substantially pure graphene mono- or multilayers, preferably pre-blended with at least part of the organic binder.
Claims18
An asbestos-free friction material comprising:
- inorganic and/or organic and/or metallic fibers consisting of between 15-30 percent of the total volume of the asbestos-free friction material;
- at least one organic thermosetting binder, wherein the at least one organic thermosetting binder is one or a combination of a phenolic resin, a melamine resin and an epoxy resin, wherein the at least one organic thermosetting binder optionally comprises an inorganic binder;
- the at least one organic thermosetting binder being between 2-50 percent of the total volume of the asbestos-free friction material;
- at least one friction modifier or lubricant including a carbonaceous material;
- and
- at least one filler or abrasive,
- wherein the at least one friction modifier may include the at least one filler,
- wherein the carbonaceous material is constituted in part by a microstructure in flakes or scales of micrometric planar dimensions and of nanometric thickness consisting of substantially pure graphene mono- or multilayers;
- in which the total amount of substantially pure graphene present is between 0.1 and 12% by volume of the total volume of the asbestos-free friction material.
A method for making a block or layer of asbestos-free friction material comprising:
- mixing respective component materials of the asbestos-free friction material comprising:
- inorganic and/or organic and/or metallic fibers consisting of between 15-30 percent of the total volume of the asbestos-free friction material;
- at least one organic thermosetting binder, wherein the at least one organic thermosetting binder is one or a combination of a phenolic resin, a melamine resin and an epoxy resin, wherein the at least one organic thermosetting binder optionally comprises an inorganic binder;
- the at least one organic thermosetting binder being between 2-50 percent of the total volume of the asbestos-free friction material;
- blending, together with one or more of said component materials, a carbonaceous material constituted by a microstructure in flakes or scales of micrometric planar dimensions and of nanometric thickness consisting of a substantially pure graphene monolayer or multilayers in an amount comprised between 0.1 and 12% by volume on the total volume of the entire asbestos-free friction material, and in which the asbestos-free friction material is free of graphite.
Dependencies are inferred from the claim text.