	US 11,703,099 B2
	Wet friction material with quaternary ammonium salts
Murat Bakan, Wooster, OH (US); Rashid Farahati, Copley, OH (US); and Michael Yanetta, Valley City, OH (US)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Filed on May 12, 2022, as Appl. No. 17/743,381.
Application 17/743,381 is a division of application No. 16/838,197, filed on Apr. 2, 2020, granted, now 11,333,214.
Prior Publication US 2022/0268332 A1, Aug. 25, 2022
Int. Cl. F16D 69/02 (2006.01); C08K 7/04 (2006.01); C08L 61/06 (2006.01); C08K 7/02 (2006.01); C08K 5/19 (2006.01); F16D 13/74 (2006.01); F16D 13/72 (2006.01)

CPC F16D 69/026 (2013.01) [C08K 5/19 (2013.01); C08K 7/02 (2013.01); C08K 7/04 (2013.01); C08L 61/06 (2013.01); F16D 13/72 (2013.01); F16D 13/74 (2013.01); F16D 2200/006 (2013.01); F16D 2200/0034 (2013.01); F16D 2200/0095 (2013.01)]

19 Claims

1. A wet friction material comprising:

a base including a matrix of fibers and filler particles embedded in the matrix of fibers;

a binder embedded in an interior of the base; and

a quaternary ammonium salt containing coating on an outer surface of the base, wherein the quaternary ammonium salt containing coating includes a quaternary ammonium salt and a solution binder.