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Zinc-free hydraulic oil additive composition

A technology of composition and hydraulic oil, which is applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problem that the application of semi-blocking bisphenol antioxidant is not involved, and there is no report on semi-blocking bisphenol zinc-free hydraulic oil additive composition , Zinc-free multi-grade hydraulic oil, poor anti-wear performance, thermal stability and other issues

Inactive Publication Date: 2016-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent EP2147967 A1 discloses a zinc-free anti-wear hydraulic oil additive composition with good thermal stability. By selecting a reasonable phosphorus-containing thermal stability additive, it effectively solves the problem of poor anti-wear performance and thermal stability of zinc-free multi-stage hydraulic oil. sexual problems
[0006] None of the above-mentioned patents involves the application of semi-barrier bisphenol antioxidants in zinc-free hydraulic oils, nor has there been any report on semi-barrier bisphenol zinc-free hydraulic oil additive compositions

Method used

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  • Zinc-free hydraulic oil additive composition
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  • Zinc-free hydraulic oil additive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] in:

[0037] Semi-barrier type bisphenol antioxidant, its structural formula is R 1 is tert-butyl, R 2 is n-butyl;

[0038] The alkyl group of the tetrapolyoxypropylene derivative of the amine demulsifier is diethyl, and its hydrophilic-lipophilic balance value is 9.

Embodiment 2

[0040]

[0041] in:

[0042] Semi-barrier type bisphenol antioxidant, its structural formula is R 1 is tert-butyl, R 2 is n-pentyl;

[0043] The alkyl group of the tetrapolyoxypropylene derivative of the amine demulsifier is diethyl, and its hydrophilic-lipophilic balance value is 12.

Embodiment 3

[0045]

[0046] in:

[0047] Semi-barrier type bisphenol antioxidant, its structural formula is R 1 is tert-butyl, R 2 is n-octyl;

[0048] The alkyl group of the tetrapolyoxypropylene derivative of the amine demulsifier is dihexyl, and its hydrophilic-lipophilic balance value is 10.

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PUM

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Abstract

A zinc-free hydraulic oil additive composition includes, by mass, 20-30% of a semi-hindered bis-phenol antioxidant, 10-40% of a dithio-phosphoric acrylate anti-wear agent, 5-10% of a benzotriazole derivative metal passivating agent, 5-10% of an anti-rust agent, 1-3% of an amine tetra-polyoxy trimethylene derivative demulsifier, 1-5% of a dispersant, and the balance being a diluent. The semi-hindered bis-phenol antioxidant has the following structure, wherein R1 is a tert-butyl group and R2 is a C3-C8 straight-chain alkyl group.

Description

technical field [0001] The invention relates to a lubricating oil additive composition, especially an additive composition suitable for zinc-free hydraulic oil. Background technique [0002] The additive with the most content in zinc-containing hydraulic oil is zinc dialkyldithiophosphate (ZDDP), which accounts for about half of the total dosage. It has been found in people's long-term experience that the presence of ZDDP has a negative effect on the copper and silver in the hydraulic system. When non-ferrous metal parts are corroded, when there is water pollution, it is easy to generate sludge to block the filter and high-precision valve clearance, and leakage will cause heavy metal pollution to the environment. Zinc-free hydraulic oil has excellent copper protection ability and filterability, and because it does not contain metal Zn ash, it will not cause environmental pollution, and can better overcome the above defects. [0003] Patent CN 102399612 B discloses a prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M167/00C10N40/08C10N30/06C10N30/12
Inventor 刘中国王辉苗新峰李春诚郝玉杰
Owner PETROCHINA CO LTD
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