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Lubricant formulations with improved antiwear properties

A lubricant composition, a technology for surface wear, applied in the directions of additives, lubricating compositions, petroleum industry, etc., which can solve problems such as hazards, efficacy of pollution control devices, etc.

Active Publication Date: 2008-08-20
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additives containing sulfur and phosphorus are well known to impart antiwear properties to finished oils and may also compromise or otherwise reduce the effectiveness of pollution control devices

Method used

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  • Lubricant formulations with improved antiwear properties
  • Lubricant formulations with improved antiwear properties
  • Lubricant formulations with improved antiwear properties

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] A commonly used method for the preparation of basic (or overbased) magnesium salts involves heating an acid and a stoichiometric excess of a metal neutralizing agent (e.g., metal oxide, hydroxide, carbonate, carbonic acid, Hydrogen salts, sulfides, etc.) in mineral oil. Additionally, various accelerators can be used in the overbasing process to aid in the incorporation of excess metals. These accelerators include compounds such as phenolic substances such as phenol, naphthol, alkylphenols, thiophenols, sulfurized alkylphenols and various condensation products of formaldehyde and phenolic substances; alcohols such as methanol, 2-propanol , octanol, cellosolve carbitol, ethylene glycol, stearyl alcohol and cyclohexanol; amines such as aniline, phenylenediamine, phenothiazine, phenyl-β-naphthylamine and dodecylamine, etc. .

[0018] The magnesium salt derived acidic organic compound may be at least one sulfur acid, carboxylic acid, phosphorus acid or (phenol) phenol or a...

Embodiment

1

11

13

[0072] As shown in the results above, samples 6, 8, 10 and 12 formulated with a magnesium-containing cleanser and ZDDP produced lower wear scars compared to samples 5, 7, 9 and 11 formulated with a calcium-containing cleanser and ZDDP . Lubricants containing 0.025 wt % ZDDP (Samples 9-12) produced the lowest wear scars compared to lubricants containing 0.05 wt % ZDDP (Samples 5-8).

[0073] More specifically, samples 1 and 3, produced lower wear scars than samples 2 and 4, which indicates that calcium-containing cleaners prevent wear better than magnesium-containing cleaners in the absence of ZDDP. Comparing the wear results of samples 3 and 4 with those of samples 1 and 2 illustrates that the addition of surface active friction modifier interferes with the antiwear performance of calcium and magnesium detergents. However, friction modifiers are necessary to enhance the fuel efficiency performance of the oil and will usually be included in a f...

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PUM

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Abstract

The present invention relates to additives and lubricating formulations for improving wear resistance. Specifically, a lubricated surface, a method of reducing wear between moving parts, a lubricant, and a lubricant additive concentrate containing a wear reducing agent. A lubricated surface comprising a base oil of lubricating viscosity, and an amount of at least one hydrocarbon-soluble magnesium compound effective to provide greater surface wear reduction as compared to the reduced surface wear of a lubricant composition in the absence of the magnesium compound. reduce. The lubricant composition contains no more than about 0.05 wt% phosphorus and no calcium detergent.

Description

technical field [0001] Embodiments described herein relate to specific oil-soluble magnesium additives and the use of such magnesium additives in lubricating oil formulations to improve the wear resistance of the formulations. Background technique [0002] Next-generation passenger car engine oils and heavy-duty diesel engine oils will require comparable anti-wear properties formulated with lower levels of phosphorus and sulfur to reduce contamination from stricter pollution control devices. Sulfur and phosphorus containing additives are well known to impart wear resistance to finished oils and may also compromise or otherwise reduce the effectiveness of pollution control devices. [0003] Zinc dialkyldithiophosphates ("Zn DDPs") have been used in lubricating oils for many years. ZnDDPs also have good wear resistance and have passed cam wear tests such as Seq IVA and TU3 wear tests. A number of patents address the preparation and use of Zn DDPs, including US Patents 4,904,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M135/10C10M125/24C10M129/74C10N30/06
CPCC10M159/24C10M2207/283C10M2207/289C10M2215/02C10M2219/046C10M2223/045C10N2010/04C10N2030/06C10N2040/02C10N2040/25C10N2030/42C10N2030/52C10N2040/252C10M139/00
Inventor W·Y·林M·T·德林
Owner AFTON CHEMICAL
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