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Lubricating oil composition and mechanical apparatus

a technology of mechanical equipment and lubricating oil, which is applied in the field of lubricating oil, can solve the problems of wasting operational energy, affecting the smooth operation of the device, and affecting the smooth operation of the device, and achieves excellent lubricity, energy saving, and high viscosity index

Inactive Publication Date: 2014-05-22
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a lubricating oil that has a high viscosity index and excellent lubricity. This oil can be used in industrial machines and mechanical devices like car transmissions, leading to energy saved.

Problems solved by technology

Using a lubricating oil with a viscosity considerably variable depending on temperature in a hydraulic device or a transmission hinders a smooth operation of the device, resulting in loss of operational energy.
However, even when a lubricating oil has a viscosity index of 200, a viscosity of the lubricating oil at minus 20 degrees C. is approximately 100 times as large as a viscosity at 100 degrees C. and a viscosity at minus 40 degrees C. is more than 1000 times. Thus, the smooth operation of a device is hindered at a low temperature to considerably waste the operational energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0042]With reference to Examples and Comparatives, the invention will be further specifically described. It should be noted that the invention is not limited by the description of Examples.

examples 1 to 3

, Comparatives 1 to 4 and Reference 1

[0043]A lubricating oil composition (a sample oil) intended to be replaceable was prepared according to a formulation for an industrial gear oil (ISO VG220) shown in Table 1 and the properties and friction / wear characteristics thereof were evaluated according to the following method. The commercially available gear oil (VG220) was also evaluated as Reference 1.

(1) Kinematic Viscosity (40 Degrees C., 80 Degrees C. and 100 Degrees C.) and Viscosity index

[0044]Measurement was conducted by a method according to JIS K 2283.

(2) Shell Four Ball Test:

[0045]A last nonseizure load (LNL, unit: N), a weld load (WL, unit: N) and a load-wear index (LWI, unit: N) were obtained under test conditions such as a revolution of 1800 rpm according to a method described in ASTM D2783.

TABLE 1Ex. 1Ex. 2Ex. 3Comp. 1Comp. 2Comp. 3Comp. 4Ref. 1FormulationBase StockSilicone Oil 11)23232323———Commercial(mass %)Silicone Oil 22)7675.576.277———Gear OilMineral Oil 150BS3)————6060...

examples 4 to 6

, Comparatives 5 to 8 and References 2 and 3

[0048]A lubricating oil composition (a sample oil) was prepared according to a formulation for an industrial gear oil (VG32) shown in Table 2 and the properties and friction-wear characteristics thereof were evaluated according to the above method. The commercially available hydraulic oil (VG32) and a commercially available ATF were also evaluated as Reference 2 and Reference 3, respectively.

TABLE 2Ex. 4Ex. 5Ex. 6Comp. 5Comp. 6Comp. 7Comp. 8Ref. 2Ref. 3FormulationBase StockSilicone Oil 1)99732575———CommercialCommercial(mass%)Silicone Oil 42)—2573.525———Hydraulic OilATFMineral Oil 150N3)————8910(VG32)Mineral Oil 60N4)—————6874AdditivesViscosity Index Improver5)————102025Sulfuric Extreme 11——11—Pressure Agent6)Phosphorus Antiwear —0.5———0.5—Agent7)Zinc Antiwear Agent8)——1———1Alkaline FM9)—0.5———0.5—Acid FM10)——0.5————Total100100100100100100100Properties 40° C. Kinematic Viscosity (mm2 / s)16.012.68.2012.541.431.519.030.232.3100° C. Kinematic V...

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Abstract

A lubricating oil composition contains: (A) organopolysiloxane; and (B) at least one of a sulfur compound, a phosphorus compound and a zinc compound, the lubricating oil composition having a kinematic viscosity not less than 1 mm2 / s and less than 40.0 mm2 / s at 100 degrees C. The lubricating oil composition is favorably usable in mechanical devices such as a hydraulic device, a stationary gear, an automobile transmission, a motor / battery cooling device and a joint.

Description

TECHNICAL FIELD[0001]The present invention relates to a lubricating oil composition containing organopolysiloxane as a base stock and a mechanical device using the same.BACKGROUND ART[0002]Using a lubricating oil with a viscosity considerably variable depending on temperature in a hydraulic device or a transmission hinders a smooth operation of the device, resulting in loss of operational energy. In particular, for, for instance, a wind power generator built in a cold region, an accelerating / decelerating device or a hydraulic device used in a region that undergoes extreme temperature changes, an automatic transmission or a continuously variable transmission for an automobile intended to travel from a very cold region to an extremely hot region, and a cooling device, a used lubricating oil desirably has a viscosity less variable depending on temperature.[0003]In connection with the above, a viscosity index (VI) is used as an index showing the temperature dependence of the viscosity o...

Claims

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Application Information

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IPC IPC(8): C10M107/50
CPCC10M169/04C10M2207/126C10M2215/04C10M2215/08C10M2219/00C10M2223/00C10M2223/045C10M2229/0405C10M2203/1006C10M2203/1025C10M2209/084C10M2219/085C10M2223/041C10M2229/0415C10N2020/02C10N2030/12C10N2040/04C10N2030/06C10N2040/25C10N2040/14C10N2010/04C10N2040/08C10M107/50
Inventor ICHIHASHI, TOSHIHIKOYOKOMIZO, MASATOSHIRASAWA, HIROSHIIKEDA, TOSHIKI
Owner IDEMITSU KOSAN CO LTD
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