US2018312776A1PendingUtilityA1

Lubricant composition

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Assignee: JXTG NIPPON OIL & ENERGY CORPPriority: Oct 29, 2015Filed: Oct 28, 2016Published: Nov 1, 2018
Est. expiryOct 29, 2035(~9.3 yrs left)· nominal 20-yr term from priority
Inventors:Mona AriyamaHitoshi KomatsubaraTakama Yasuda
C10N 2030/06C10N 2040/04C10N 2030/02C10M 2223/049C10M 2203/1006C10M 2215/04C10N 2030/68C10M 2205/0285C10M 2203/1025C10M 2223/04C10M 133/04C10M 2219/08C10M 2219/106C10M 2209/084C10M 135/36C10M 133/16C10M 161/00C10M 2215/02C10M 2215/08C10M 145/14C10M 135/20C10N 2240/04C10N 2230/02C10N 2230/06
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Claims

Abstract

The present invention provides a lubricating oil composition comprising: a lubricating base oil; 1.0% by mass or more and 15.0% by mass or less of a dispersant poly(meth)acrylate compound having the weight average molecular weight of 20000 or more and 200000 or less; 0.05% by mass or more and 6.0% by mass or less of a thiadiazole compound; 1.5% by mass or more and 4.0% by mass or less of a polysulfide compound; and 0.2% by mass or more and 1.5% by mass or less of a friction modifier, based on the total amount of the lubricating oil composition, wherein the mass ratio of the polysulfide compound content to the thiadiazole compound content (polysulfide compound/thiadiazole compound) is 0.4 or more and 50 or less, and the kinematic viscosity at 100° C. of the lubricating oil composition is 7.0 mm 2 /s or more and 35.0 mm 2 /s or less.

Claims

exact text as granted — not AI-modified
1 . A lubricating oil composition comprising:
 a lubricating base oil;   1.0% by mass or more and 15.0% by mass or less of a dispersant poly(meth)acrylate compound having a weight average molecular weight of 20000 or more and 200000 or less;   0.05% by mass or more and 6.0% by mass or less of a thiadiazole compound;   1.5% by mass or more and 4.0% by mass or less of a polysulfide compound; and   0.2% by mass or more and 1.5% by mass or less of a friction modifier,   based on a total amount of the lubricating oil composition,   wherein a mass ratio of the polysulfide compound content to the thiadiazole compound content (polysulfide compound/thiadiazole compound) is 0.4 or more and 50 or less, and   a kinematic viscosity at 100° C. of the lubricating oil composition is 7.0 mm 2 /s or more and 35.0 mm 2 /s or less.   
     
     
         2 . The lubricating oil composition according to  claim 1 , wherein the friction modifier comprises at least one selected from a group consisting of primary or secondary amide friction modifiers and primary or secondary amine friction modifiers. 
     
     
         3 . The lubricating oil composition according to  claim 1 , wherein the lubricating oil composition is used for gear oils. 
     
     
         4 . The lubricating oil composition according to  claim 1 , wherein the lubricating oil composition is used for final reduction gear oils. 
     
     
         5 . The lubricating oil composition according to  claim 2 , wherein the lubricating oil composition is used for gear oils. 
     
     
         6 . The lubricating oil composition according to  claim 2 , wherein the lubricating oil composition is used for final reduction gear oils.

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