US2016040095A1PendingUtilityA1

Lubricating oil composition

Assignee: IDEMITSU KOSAN COPriority: Mar 15, 2013Filed: Mar 13, 2014Published: Feb 11, 2016

Est. expiryMar 15, 2033(~6.6 yrs left)· nominal 20-yr term from priority

Inventors:Tomoaki Fujii Masatoshi Toda

C10M 2207/2805C10N 2020/02C10M 2209/084C10N 2040/04C10M 169/04C10M 169/044C10M 145/14

PatentIndex Score

Cited by

References

Claims

Abstract

A lubricating oil composition of the invention contains a first base oil having a kinematic viscosity at 100 degrees C. in a range from 0.6 mm 2 /s to 3.5 mm 2 /s and a first poly(meth)acrylate having a mass average molecular weight in a range from 3×10 4 to 5×10 4 .

Claims

exact text as granted — not AI-modified

1 . A lubricating oil composition comprising:
 a first base oil having a kinematic viscosity at 100 degrees C. in a range from 0.5 mm 2 /s to 3.5 mm 2 /s; and   a first poly(meth)acrylate having a mass average molecular weight in a range from 3×10 4  to 5×10 4 .   
     
     
         2 . The lubricant oil composition according to  claim 1 , further comprising:
 an ester having a kinematic viscosity at 100 degrees C. of 5 mm 2 /s or less as a second base oil.   
     
     
         3 . The lubricating oil composition according to  claim 1 , further comprising:
 a second poly(meth)acrylate having a mass average molecular weight in a range from 1.4×10 5  to 2×10 5 .   
     
     
         4 . The lubricating oil composition according to  claim 1 , further comprising:
 a molybdenum compound.   
     
     
         5 . The lubricating oil composition according to  claim 1 , further comprising:
 at least one member selected from the group consisting of a detergent dispersant, an extreme pressure agent, and an oiliness agent.   
     
     
         6 . The lubricating oil composition according to  claim 1 , wherein
 the lubricating oil composition has the kinematic viscosity at 100 degrees C. in a range from 13.5 mm 2 /s to 18.5 mm 2 /s and a kinematic viscosity at 40 degrees C. of 65 mm 2 /s or less.   
     
     
         7 . The lubricating oil composition according to  claim 1 , wherein
 the lubricating oil composition has a viscosity index of 245 or more.   
     
     
         8 . The lubricating oil composition according to  claim 1 , wherein
 the lubricating oil composition has 15% or less of a reduction ratio of the kinematic viscosity at 100 degrees C. in a shear stability test that is an ultrasonic shear test.   
     
     
         9 . The lubricating oil composition according to  claim 1 , wherein
 the lubricating oil composition is adapted for use in a manual transmission.

Join the waitlist — get patent alerts

Track US2016040095A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.