	US 12,410,307 B2
	NBR composition
Michiyo Hirayama, Kumamoto (JP); Hideto Komurasaki, Kumamoto (JP); and Keisuke Takahashi, Kumamoto (JP)
Assigned to NOK CORPORATION, Tokyo (JP)
Appl. No. 17/928,071
Filed by NOK Corporation, Tokyo (JP)
PCT Filed May 11, 2021, PCT No. PCT/JP2021/017886 § 371(c)(1), (2) Date Nov. 28, 2022, PCT Pub. No. WO2021/241206, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2020-094803 (JP), filed on May 29, 2020.
Prior Publication US 2023/0203283 A1, Jun. 29, 2023
Int. Cl. C08L 9/02 (2006.01); C08K 3/014 (2018.01); C08K 3/22 (2006.01); C08K 3/30 (2006.01); C08K 5/01 (2006.01); C08K 5/09 (2006.01)

CPC C08L 9/02 (2013.01) [C08K 3/014 (2018.01); C08K 3/22 (2013.01); C08K 3/30 (2013.01); C08K 5/01 (2013.01); C08K 5/09 (2013.01); C08K 2003/2296 (2013.01)]

4 Claims

1. An NBR composition comprising, based on 100 parts by weight of NBR, 0.2 to 0.3 parts by weight of stearic acid, and microcrystalline wax, which has the melting start temperature of 65° C., in an amount equal to 2 to 6 times the amount of the stearic acid, and

the NBR composition further comprises zinc oxide, and

wherein the NBR composition has a bound acrylonitrile content of at least 35%.