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Hydraulic oil composition

A technology of working oil and composition, applied in the direction of lubricating composition, petroleum industry, thickener, etc., can solve the problem of insufficient sludge resistance, wear resistance, friction characteristics, water separation and friction reduction of sliding parts. and other problems, to achieve the effect of good energy performance and energy saving

Active Publication Date: 2012-07-18
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, even these hydraulic oils cannot be said to have sufficient friction characteristics such as sludge resistance (sludge suppression) and wear resistance.
[0012] Therefore, the present situation is that there is no hydraulic working oil that satisfies the required energy saving properties, thermal stability (sludge resistance), wear resistance, and seizure resistance (seizure resistance) in a balanced manner. , and further water separation properties and friction reduction of sliding parts, etc.

Method used

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  • Hydraulic oil composition
  • Hydraulic oil composition
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1

[0170] Each hydraulic fluid composition having the composition shown in Table 1 was prepared, and the performance was evaluated. The results are shown in Table 1.

[0171] In addition, in Comparative Example 1, a Zn-based commercial oil (hydraulic hydraulic oil) having a viscosity index of 108 was used.

[0172] Table 1

[0173]

[0174] The following facts can be known from Table 1.

[0175] As a result of the high-pressure vane pump test, Examples 1 to 4 all have excellent power consumption and mechanical efficiency. As a result of the FZG test, Examples 1 to 4 all satisfy the ISO standard 10 or higher. As a result of thermal stability, the precipitation amount of the sludge of Examples 1 to 4 was extremely small compared to the Zn-based commercial oil of Comparative Example 1. As a result of the water separability test, it can be confirmed that Examples 1 to 4 can maintain good water separability. As a result of the bonding test, compared with the rubber material, Examples 1 to...

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Abstract

A hydraulic oil composition obtained by blending a base oil having a sulfur content of less than 0.03% by mass, a content of saturates of 90% by mass or above, a viscosity index of 80 or above and an absolute viscosity at 40 DEG C of 1 to 1000mPa s with (A) 1 to 20% by mass of a polymethacrylate-type viscosity index improver having a weight-average molecular weight of 10,000 to 50,000, (B) 0.005 to 5% by mass of an acid amide, (C) 0.005 to 5% by mass of (c-1) a specific hydrogenphosphate ester and / or (c-2) a specific hydrogenphosphite ester and (D) 0.005 to 5% by mass of at least one member selected from among polyhydric alcohol esters, alkanolamines, olefin sulfides, and thiocarbamates. The hydraulic oil composition exerts satisfactory and well-balanced properties essential to hydraulic oil which include energy saving, heat stability (sludge resistance), prevention of wear and scuffing, water shedding, and friction reduction in sliding parts.

Description

Technical field [0001] The present invention relates to a hydraulic working oil composition, and more specifically, to a hydraulic working oil composition, which has good energy saving properties, thermal stability (sludge resistance), abrasion resistance, and seizure resistance (anti-seize It is suitable for hydraulic machinery, work machinery, industrial machinery and so on. Background technique [0002] Hydraulic working oil is a power transmission fluid used in the power transmission, force control, buffering and other actions of hydraulic systems such as hydraulic equipment or devices, and can also serve as a lubrication function for sliding parts. [0003] There are metal-metal or metal-rubber (resin) sliding parts in pumps, control valves, hydraulic cylinders, etc. in the hydraulic circuit. The hydraulic working oil used in such a hydraulic circuit is required to have good friction characteristics such as wear resistance, seizure resistance, and friction reduction propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M129/76C10M133/08C10M133/16C10M135/04C10M135/18C10M137/02C10M137/04C10M137/08C10M145/14C10M149/06C10N40/08C10N30/08C10N30/06C10N30/00C10N20/04C10N20/02C10N20/00
CPCC10M2223/041C10M169/04C10M2223/04C10M2215/042C10M2219/066C10M2209/084C10M2215/223C10M2223/049C10M2207/026C10N2240/08C10M2223/043C10N2230/06C10M2207/289C10M2219/022C10M2203/1006C10M2215/08C10N2030/06C10N2040/08C10M119/12C10M129/68C10M169/00
Inventor 佐藤德荣川崎宏原重雄上村秀人筱田实男
Owner IDEMITSU KOSAN CO LTD
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