Lubricative Composition for Industrial Machinery and Equipment

a technology for industrial machinery and equipment, applied in the direction of lubricant composition, organic chemistry, group 5/15 element organic compounds, etc., can solve the problems of increasing thermal load, generating a large amount of sludge, and insufficient sludge resistance and extreme pressure properties of conventional gear oil when used in the gear of recent industrial machines

Inactive Publication Date: 2008-03-06
NIPPON OIL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0043]The hydraulic oil is excellent in all the sludge suppressi

Problems solved by technology

However, the conventional gear oil, when used in the gear of the recent industrial machines, was not always sufficient in the sludge resistance and the extreme pressure property.
That is, for the use required to have high extreme pressure property and abrasion resistance, a lubricating oil added with the extreme pressure agent such as zinc dialkyldithiophosphate is widely used, but even if these conventional extreme pressure agents are added in small amount, thermal load is increased and a great amount of sludge is generated, and there is tendency to lower thermal and oxidation stability.
Therefore, it is difficult for the lubricating oil added with the sulfur-based extreme pressure agent to reach sufficient thermal and oxidation stability in the gear of the recent industrial machines.
Meanwhile, the phosphorus-based extreme pressure agent has tendency not to generate sludge easily compared with the sulfur-based extreme pressure agent, but when the phosphorus-based extreme pressure agent is used alone, it is difficult to obtain high extreme pressure property in the gear oil level.
Moreover, after making a paper in the paper machine, there is a step of drying the paper, but in the conventional paper machine, the drying time is comparatively long and the drying temperature is also comparatively low.
However, in the recent paper machines, the drying time became short in the drying step to improve the production efficiency, as a result, the drying temperature also became very high, and demand for the heat resistance in the lubricating oil used in the paper machine has increased.
Here, in order for the conventional lubricating oil for paper machines to improve abrasion resistance, using the extreme pressure agent is general, but if the extreme pressure agent is used, the heat resistance is deteriorated, and sludge, cocking or the like is easily generated in

Method used

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  • Lubricative Composition for Industrial Machinery and Equipment
  • Lubricative Composition for Industrial Machinery and Equipment
  • Lubricative Composition for Industrial Machinery and Equipment

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Experimental program
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specific embodiment

[0172]The lubricative composition of the invention is specifically suitable as a lubricating oil composition. As more specific embodiment, it is suitable for a gear oil composition, a lubricating oil composition for paper machines, a lubricating oil composition for slide guides, a hydraulic oil, and the like.

(Embodiment of Gear Oil Composition)

[0173]Gear oil composition is more specifically a composition containing at least one kind of the component (A), the component (B) and the component (C) in the base oil.

[0174]The mixing ratio of the component (A), the component (B) and the component (C) concerning the gear oil composition is as in the following.

[0175]The content of a phosphorus-containing carboxylic acid compound as the component (A-1) in the gear oil composition of the invention is not particularly limited, but it is preferably 0.001 to 5% by weight, more preferably 0.002 to 3% by weight, and even more preferably 0.003 to 1% by weight based on the total amount of the composit...

examples

[0354]Next, the present invention will be described in more detail by way of Examples. Further, the gear oil, the lubricating oil for paper machines, the lubricating oil for slide guides and the hydraulic oil which are specific embodiments of the lubricative composition of the invention will be described individually in their order by way of Examples, respectively.

[Gear Oil Composition—1]

[0355]This Example is an embodiment related to the gear oil formed by combining the component (C-1), the component (C-2) or a mixture thereof into the base oil.

[0356]Tested base oils, the kind of additives added thereto and their amounts are listed below. Further, the test methods carried out on each combined lubricating oil composition is also listed below. The obtained test results are presented in Tables 1 to 3.

[0357](IAE Oil Temperature)

[0358]Based on the IAE gear test specified in IP 166 / 77 (92), the oil temperature of the gear box was measured after 120 minutes by operating under the rotation ...

examples 6 to 8

[0734]In Examples 6 to 8, the lubricating oil compositions having the formulation presented in Table 4 were prepared using the base oils and additives above, and the ester oiliness improver listed below, respectively.

[0735](D) Ester Oiliness Improver:

[0736]D1: ester of sorbitan and oleic acid (sorbitan monooleate 25 mol %, sorbitan dioleate 40 mol %, sorbitan trioleate 30 mol % and sorbitan tetraoleate 5 mol %)

[0737]D2: triester of glycerin and a mixture fatty acids of acetic acid and fatty acid having 16 to 20 carbon atoms (fatty acid composition: acetic acid 66 mol %, straight-chained saturated fatty acid having 16 to 20 carbon atoms 30 mol % and straight-chained unsaturated fatty acid having 18 carbon atoms 4 mol %)

[0738]D3: ester of glycerin and branched saturated fatty acid having 16 to 20 carbon atoms (glycerin monoester 25 mol %, glycerin diester 75 mol % and glycerin triester 0 mol %)

[0739]Next, in the same manner as the above examples, the tests were carried out. The obtain...

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Abstract

A lubricative composition for industrial machinery and equipment which comprises a base oil selected from among mineral oils, fats and oils, synthetic oils and mixture of two or more of them, and at least one additive selected from among the following components (A) to (D): component (A): (A-1) a phosphorus-containing carboxylic acid and/or (A-2) a thiophosphoric ester, component (B): a dispersant viscosity index improver, component (C): (C-1) a specific amidocarboxylic acid compound and/or (C-2) a specific carboxylic acid compound, and component (D): an ester oiliness improver. The composition is favorable as a lubricating oil composition and useful as a gear oil composition, a lubricating oil composition for paper machines or a lubricating oil composition for slide guides, a hydraulic oil, or the like.

Description

TECHNICAL FIELD[0001]The present invention relates to a novel lubricative composition for industrial machinery and equipment, more specifically, to a lubricating oil composition with excellent lubricative characteristics such as the abrasion resistance, the extreme pressure property, the frictional property and the like, as well as excellent in characteristics required according to the use of industrial machinery and equipment, and even more specifically, to a gear oil composition, a lubricating oil composition for paper machines, a lubricating oil composition for slide guides and a hydraulic oil. In particular, the gear oil composition is excellent in the sludge resistance and the extreme pressure property, the lubricating oil composition for paper machines is excellent in the sludge resistance and the extreme pressure property, the lubricating oil composition for slide guides is excellent in both aspects of the frictional property and the anti-stick-slip property, and the hydrauli...

Claims

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Application Information

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IPC IPC(8): C10M129/40C10M129/68C10N10/02C10M129/74C10M129/76C10M133/16C10M137/04C10M137/10C10M149/02C10M161/00
CPCC10M169/04C10M2203/1006C10N2240/401C10N2240/08C10N2240/04C10N2240/02C10N2230/12C10N2230/10C10M2205/0285C10M2207/026C10M2207/12C10M2207/126C10M2207/283C10M2207/2835C10M2207/289C10M2209/084C10M2215/064C10M2215/08C10M2215/28C10M2217/02C10M2219/024C10M2219/046C10M2219/106C10M2223/04C10M2223/041C10M2223/045C10N2210/01C10N2210/02C10N2230/00C10N2230/04C10N2230/06C10N2230/08C10N2220/028C10N2010/02C10N2010/04C10N2030/00C10N2030/04C10N2030/06C10N2030/08C10N2030/10C10N2030/12C10N2040/02C10N2040/04C10N2040/08C10N2040/22C10N2020/071
Inventor TAKIGAWA, KATSUYABEPPU, YUKIHARUMITSUMOTO, SINICHIHATA, MASAHIROAKIYAMA, EIJI
Owner NIPPON OIL CORP
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