Patent ID: 8790772

Claim:
A process for producing a friction lining for clutches, produced from at least one winding, where the winding is wound from at least one yarn impregnated with an impregnation dispersion comprising at least resin, a hardener, a rubber system, fillers and a vulcanization system, wherein the resin is a low-melting, water-free and solvent-free novolak resin and the rubber system has a high to medium viscosity of greater than 5000 mPas and can be homogenized with other constituents of the impregnation dispersion, and wherein the impregnation dispersion consists of formulation 1 or formultion 2, where formulation 1 consists of 52% novoiak, 3% hexamethylenetetramina 10% NBR rubber, 3% kaolin,10% barite, 10%tricalcium phosphate, 5% graphite, 1% sulfur, and 1% vulcanization accelerator, and formulation 2 consists of 35% novolak, 3% hexamethylenetetrarnine, 26% NBR rubber, 2% kaolin, 10% barite, 7% tricalcium phosphate, 9% carbon black, 2%tin sulfide, 3% sulfur, and 3% vulcanization accelerator, where percentages are percentages by weight based in the impregretion dispersion.