US2013023456A1PendingUtilityA1

Lubricant composition for an internal combustion engine

Assignee: IDEMITSU KOSAN COPriority: Apr 2, 2010Filed: Mar 31, 2011Published: Jan 24, 2013

Est. expiryApr 2, 2030(~3.7 yrs left)· nominal 20-yr term from priority

Inventors:Kazuhiro Teshima Motoharu Ishikawa

C10N 2040/25C10M 111/04C10N 2030/54C10N 2030/74C10M 2203/1025C10N 2070/00C10N 2030/02C10M 2203/1006C10M 2205/0285C10N 2020/02C10M 2209/084C10M 101/04C10M 105/12C10M 105/24C10M 107/02C10M 103/06C10M 105/66C10M 105/42C10M 105/20C10M 105/18C10M 101/02

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References

Claims

Abstract

A lubricating oil composition for an internal combustion engine contains a component (A) of a polyalphaolefin having a kinematic viscosity at 100 degrees C. of 5.5 mm 2 /s or less, a CCS viscosity at −35 degrees C. of 3000 mPA·s or less and a NOACK of 12 mass % or less, and a component (B) of a mineral oil having a viscosity index of 120 or more. The component (A) is contained at a content of 25 mass % or more of a total amount of the composition.

Claims

exact text as granted — not AI-modified

1 . A lubricating oil composition for an internal combustion engine, comprising:
 a component (A) of a polyalphaolefin having a kinematic viscosity at 100 degrees C. of 5.5 mm 2 /s or less, a CCS viscosity at −35 degrees C. of 3000 mPa·s or less and a NOACK of 12 mass % or less; and   a component (B) of a mineral oil having a viscosity index of 120 or more;   wherein the component (A) is present in an amount of 25 mass % or more of a total amount of the composition.   
     
     
         2 . The lubricating oil composition according to  claim 1 , wherein
 a kinematic viscosity at 100 degrees C. of a mixed base oil provided by blending the components (A) and (B) is 4.6 mm 2 /s or less.   
     
     
         3 . The lubricating oil composition according to  claim 1 , wherein
 the NOACK of the composition is 10 mass % or less and the CCS viscosity at −35 degrees C. is 6000 mPa·s or less.   
     
     
         4 . The lubricating oil composition according to  claim 1 , wherein
 the component (B) is present in an amount of 20 mass % or more of the total amount of the composition.   
     
     
         5 . The lubricating oil composition according to  claim 1 , wherein
 the component (A) is provided by polymerization with a metallocene catalyst.   
     
     
         6 . The lubricating oil composition according to  claim 1 , wherein
 the component (A) is a polyalphaolefin formed by at least one of alpha-olefins having 10 to 14 carbon atoms as a monomer unit.   
     
     
         7 . The lubricating oil composition according to  claim 1 , wherein
 the component (A) is a trimer.

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