US 12,006,485 B2
Lubricating oil additive and lubricating oil composition containing same
Shinji Iino, Tokyo (JP); Eiji Katsuno, Tokyo (JP); Taro Sumi, Tokyo (JP); Hironobu Matsueda, Ibaraki (JP); and Hiroshi Sakata, Ibaraki (JP)
Assigned to ADEKA CORPORATION, Tokyo (JP); and DIC CORPORATION, Tokyo (JP)
Appl. No. 17/629,997
Filed by ADEKA CORPORATION, Tokyo (JP); and DIC CORPORATION, Tokyo (JP)
PCT Filed Jul. 14, 2020, PCT No. PCT/JP2020/027352
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/020107, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-137391 (JP), filed on Jul. 26, 2019.
Prior Publication US 2022/0259515 A1, Aug. 18, 2022
Int. Cl. C10M 135/36 (2006.01); C10M 135/18 (2006.01); C10M 169/04 (2006.01)
CPC C10M 135/36 (2013.01) [C10M 135/18 (2013.01); C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2219/068 (2013.01); C10M 2219/106 (2013.01)] 8 Claims
 
1. A lubricating oil additive, comprising:
a molybdenum compound (A) represented by the following general formula (1); and
a sulfur-based composition (B) containing a sulfur-based compound (b-1) represented by the following general formula (2) and at least one kind of sulfur-based compound (b-2) represented by the following general formula (3) or (4), wherein a mass ratio “b-1:b-2” between contents of the sulfur-based compound (b-1) and the sulfur-based compound (b-2) in the sulfur-based composition (B) is from 0.5:99.5 to 95:5:

OG Complex Work Unit Chemistry
where R1 to R4 each represent linear or branched alkyl groups having 8 or 13 carbon atoms, the groups being identical to or different from each other, and X1 to X4 each independently represent an oxygen atom or a sulfur atom;

OG Complex Work Unit Chemistry
where R5 and R6 each represent alkyl groups having 3 to 24 carbon atoms, the groups being identical to or different from each other, and “a” and “b” each represent a number from 1 to 5;

OG Complex Work Unit Chemistry
where R7 to R10 each represent alkylene groups having 1 to 28 carbon atoms, the groups being identical to or different from each other, R11 and R12 each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, “c” and “d” each independently represent a number from 1 to 5, and averages of “c” and “d” each are from 2.5 to 3.5, provided that at least one of R11 or R12 represents an alkyl group having 1 to 3 carbon atoms.