US 12,253,133 B2
Clutch assembly including wet friction material with calcined kaolin clay and tung modified phenolic resin
Kayla Covington, Dalton, OH (US); Rashid Farahati, Copley, OH (US); Murat Bakan, Canton, OH (US); and Michael Yanetta, Valley City, OH (US)
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Filed on Jan. 3, 2022, as Appl. No. 17/567,394.
Prior Publication US 2023/0213078 A1, Jul. 6, 2023
Int. Cl. F16D 69/02 (2006.01); F16D 13/64 (2006.01); F16D 13/72 (2006.01); F16D 13/74 (2006.01)
CPC F16D 69/026 (2013.01) [F16D 13/64 (2013.01); F16D 13/72 (2013.01); F16D 13/74 (2013.01); F16D 2200/006 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A clutch assembly for a motor vehicle drivetrain comprising:
a rigid support; and
a wet friction material fixed to a surface of the rigid support, the wet friction material comprising:
a base material including a matrix of fibers and filler particles embedded in the matrix of fibers, the filler particles including calcined kaolin clay, the base material including, by percent weight, 5 to 60% of calcined kaolin clay; and
a binder embedded in the base material, the binder being tung modified phenolic resin,
wherein the wet friction material includes, by percent weight, 31 to 35%, of tung modified phenolic resin,
wherein the wet friction material has a dynamic friction coefficient of 0.17 to 0.24 in automatic transmission fluid having a temperature of 120° C. in a rotational speed range of 5 RPM to 50 RPM and in an applied pressure of 1.0 to 2.5 MPa.