US 11,807,825 B2
Lubricant composition and bearing having the same sealed therein
Kazuo Okamoto, Shizuoka (JP); Hiroyuki Otsuki, Shizuoka (JP); Shigemasa Itabashi, Kanagawa (JP); and Ayana Takemura, Kanagawa (JP)
Assigned to NIPPON THOMPSON CO., LTD., Tokyo (JP); and Ushio Chemix Corporation, Shizuoka (JP)
Appl. No. 17/761,917
Filed by NIPPON THOMPSON CO., LTD., Tokyo (JP); and Ushio Chemix Corporation, Shizuoka (JP)
PCT Filed Aug. 11, 2020, PCT No. PCT/JP2020/030583
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/054000, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 2019-170659 (JP), filed on Sep. 19, 2019.
Prior Publication US 2022/0364009 A1, Nov. 17, 2022
Int. Cl. C10M 105/18 (2006.01); C10M 125/18 (2006.01); C10N 30/00 (2006.01); C10N 20/00 (2006.01); C10N 30/06 (2006.01); C10N 30/12 (2006.01); C10N 40/02 (2006.01)
CPC C10M 105/18 (2013.01) [C10M 125/18 (2013.01); C10M 2201/081 (2013.01); C10M 2207/04 (2013.01); C10M 2207/0406 (2013.01); C10N 2020/079 (2020.05); C10N 2030/06 (2013.01); C10N 2030/12 (2013.01); C10N 2030/41 (2020.05); C10N 2040/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A lubricant composition comprising at least one dicyclic liquid crystal compound represented by the following formula (1), at least one tricyclic liquid crystal compound represented by the following formula (2), and halogen ions, wherein the content of the halogen ions in the lubricant composition is 4.43 to 900 ppm:
formula (1):

OG Complex Work Unit Chemistry
wherein R1 and R2 are the same or different, and are a group: —OCH2CH2CH(R′)CH2CH2OR (wherein R is linear or branched CnH2n+1 wherein the relationship: 1≤n≤20 is satisfied, and R′ is methyl or ethyl),
formula (2):

OG Complex Work Unit Chemistry
wherein R11 and R21 are the same or different, and are a group: —OR or a group: —OCH2CH2CH(R′)CH2CH2OR (wherein R is linear or branched CnH2n+1 wherein the relationship: 1≤n≤20 is satisfied, and R′ is methyl or ethyl), and
R12, R13, R22, and R23 are the same or different, and are hydrogen, a group: —OR, or a group: —OCH2CH2CH(R′)CH2CH2OR (wherein R is linear or branched CnH2n+1 wherein the relationship: 1≤n≤20 is satisfied, and R′ is methyl or ethyl),
wherein the halogen ions are at least one type selected from the group consisting of chloride ions and bromide ions, and
wherein a mass ratio of the dicyclic liquid crystal compound to tricyclic liquid crystal compound ([the dicyclic liquid crystal compound]:[the tricyclic liquid crystal compound]) is 4:6 to 8:2.