Friction material and process for the production thereof
AssigneesItri Limited, Pbw Metal Products Limited
InventorsJeremy Arthur Pearce, Stephen John Glynn
Life of this patent
Estimating the term…
Abstract
A process for the in-situ formation of a lubricating phase comprising sulphur and tin in a friction material, wherein reaction of a sulphur source with a tin source in said friction material results in the formation of said lubricating phase, and wherein said reaction is initiated or effected by heat resulting, in use, from the generation of friction, wherein said sulphur source is selected from one or both of sulphur and/or a metal sulphide selected from one or more of iron, copper, zinc, titanium and bismuth, and wherein said tin source is selected from one or more of tin, a tin-containing compound and/or a tin-containing alloy.
Claims32
A process for the in-situ formation of a lubricating phase comprising sulphur and tin in a friction material, wherein reaction of a sulphur source with a tin source in said friction material results in the formation of said lubricating phase, and wherein said reaction is initiated or effected by heat resulting, in use, from the generation of friction, wherein said sulphur source is selected from one or both of sulphur and/or a metal sulphide selected from one or more of iron, copper, zinc, titanium and bismuth, and wherein said tin source is selected from one or more of tin, a tin-containing compound and/or a tin-containing alloy.
A friction material for a brake pad, brake shoe, brake lining or clutch lining, wherein said friction material includes a sulphur source and a tin source, wherein said sulphur source is selected from one or both of sulphur and/or a metal sulphide selected from one or more of iron, copper, zinc, titanium and bismuth, and wherein said tin source is selected from one or more of tin, a tin-containing compound and a tin-containing alloy, said friction material optionally further comprising a carbon source, and wherein, in use, said sulphur source and said tin source react in-situ to form a lubricating phase having the general formula SnxSy, where x is form 0.5 to 5 and y is from 1 to 10, said reaction being initiated or effected by heat resulting from the generation of friction.
Use of a tin source and a sulphur source for manufacturing a friction material, wherein reaction of said tin source and said sulphur source results in the formation of a lubricating phase, said reaction being initiated or effected by heat resulting from the generation of friction, wherein said sulphur source is selected from one or both of sulphur and/or a metal sulphide selected from one or more of iron, copper, zinc, titanium and bismuth, and wherein said tin source is selected from one or more of tin, a tin-containing compound and/or a tin-containing alloy.
A process for manufacturing a friction material for a friction element, the process comprising:
- incorporating a sulphur source and a tin source into the friction element;
- wherein the sulphur source is selected from the group consisting of sulphur, iron sulphide, copper sulphide, zinc sulphide, titanium sulphide, and combinations thereof;
- wherein the tin source is selected from the group consisting of tin, a tin-containing compound, a tin-containing alloy, and combinations thereof;
- wherein the sulphur source and the tin source are adapted to react with each other to form a lubricating phase upon exposure to heat resulting from the generation of friction.
Dependencies are inferred from the claim text.