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A hydraulic oil composition

A technology of hydraulic oil composition and polymer, applied in the direction of lubricating composition, petroleum industry, etc., can solve the problem of easy generation of precipitates, etc., and achieve the effect of excellent biodegradability and excellent emulsification resistance

Active Publication Date: 2016-05-25
NOF CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned full esters of neopentyl polyols and unsaturated fatty acids, when quinoline-based antioxidants and phosphorus-based or sulfur-based extreme pressure agents are used at the same time, there is a problem that precipitates are more likely to be generated at high temperatures.

Method used

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  • A hydraulic oil composition
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  • A hydraulic oil composition

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Embodiment

[0081] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

[0082] [Synthesis of Ester Mixture I]

[0083] Put 1200g (8.94mol) of trimethylolpropane (TMP) and 2486g (8.94mol) of industrial oleic acid manufactured by NOF Co. NAA-34 (unsaturated acid content: 90% by mass) was reacted under normal pressure at 220° C. while distilling off the reaction water under a nitrogen stream until the acid value was 0.1 mgKOH / g or less. After cooling the reaction, it was filtered to remove most of the unreacted trimethylolpropane. Then, about 2500 g of partial ester I are obtained by distillation.

[0084] The obtained partial ester I was silylated (TMSized), and then analyzed by gas chromatography under the following conditions. It was a partial ester mixture of 98.1% by mass of TMP monoester and 1.9% by mass of TMP diester.

[0085]

[0086] Column: packed column OV-1 (0.4m)

[0087] Heating conditions: from 150°C ...

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Abstract

The invention provides a hydraulic oil composition with excellent biodegradability, fire resistance, wear resistance, oxidation stability, heat stability, anti-rust property and demulsibility. With respect to 100 mass parts of an ester compound (A), the hydraulic oil composition contains 0.5-1.5 mass parts of quinoline derivatives or polymers thereof (B), and 0.1-0.5 mass part of phosphorodithioate derivatives (C). (A) is an ester compound of neopentyl polyol ester with a carbon atom number of 5-10 and a valence number of alcohol of 3-6 and straight chain unsaturated fatty acid with a carbon atom number of 16-22. The ester compound contains 0.1-5 mass% of moniester (a1), 10-30 mass% of diester (a2), and 65-89.9 mass% of ester with a valence number greater than 3, the mass ratio of the monoester (a1) to the diester (a2) is 1 / 99-20 / 80.

Description

technical field [0001] The present invention relates to a hydraulic oil composition (Japanese: hydraulic oil) used as a power transmission medium in hydraulic equipment. Specifically, it relates to a hydraulic oil composition which is excellent in biodegradability, and also excellent in flame retardancy, wear resistance, oxidation stability, thermal stability, rust prevention, and emulsification resistance. Background technique [0002] In recent years, new strategies for environmental protection have become an important mission worldwide. Lubricating oils are no exception, and people are increasingly looking for lubricating oils that can reduce environmental loads. Under such circumstances, biodegradable lubricants that are easy to decompose in nature in the event of leakage and have little impact on the ecosystem are attracting attention as lubricating oils that can reduce environmental loads. [0003] Among biodegradable lubricating oils, as a countermeasure against lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/06C10N30/10C10N30/12C10N40/08
Inventor 川本英贵长谷川卓司
Owner NOF CORP