	US 12,264,291 B2
	Lubricant composition
Akihiko Shimura, Ibaraki (JP); Toshio Nitta, Ibaraki (JP); and Keita Nakashi, Ibaraki (JP)
Assigned to NOK KLUEBER CO., LTD., Tokyo (JP)
Appl. No. 18/009,108
Filed by NOK KLUEBER CO., LTD., Tokyo (JP)
PCT Filed Jun. 3, 2021, PCT No. PCT/JP2021/021128 § 371(c)(1), (2) Date Dec. 8, 2022, PCT Pub. No. WO2021/251250, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2020-100512 (JP), filed on Jun. 9, 2020.
Prior Publication US 2023/0250355 A1, Aug. 10, 2023
Int. Cl. C10M 135/10 (2006.01); C10M 169/04 (2006.01); C10N 30/12 (2006.01)

CPC C10M 135/10 (2013.01) [C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2207/2855 (2013.01); C10M 2215/1026 (2013.01); C10M 2219/044 (2013.01); C10N 2030/12 (2013.01)]

4 Claims

1. A lubricant composition comprising:

a base oil;

a thickener;

a neutral C₉-C₃₆alkyl benzene sulfonate metal salt which has 1 or 2 alkyl groups; and

a neutral C₉alkyl naphthalene sulfonate metal salt which has 2 alkyl groups,

wherein a content of the alkyl benzene sulfonate metal salt in the lubricant composition is 0.8 to 1.7% by mass,

a content of the alkyl naphthalene sulfonate metal salt in the lubricant composition is 0.1 to 1.2% by mass,

a total content of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt in the lubricant composition is 1 to 2.2% by mass, and

a mass fraction of the alkyl benzene sulfonate metal salt to a total mass of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt is 0.4 to 0.92.