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Lubricant formulations containing extreme pressure agents

a technology of extreme pressure agent and lubricant composition, which is applied in the direction of lubricant composition, petroleum industry, additives, etc., can solve the problems of increasing the solubility of components in a finished lubricant composition, requiring the presence of compatibilizing components, and difficult handling etc., to improve the solubility of sulfurized extreme pressure agents, improve lubricant compositions and uses, and improve the effect of solubility

Inactive Publication Date: 2007-04-05
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for improving the stability and properties of lubricant compositions containing extreme pressure agents. The method involves blending organic acid and amine components of a lubricant additive package with a sulfurized extreme pressure agent. This results in a lubricant additive package that has lower turbidity and reduced odor compared to using other methods. The patent also describes a method for making a sulfurized extreme pressure agent that can be used in a non-hazy lubricant composition. The technical effect of the patent is to provide improved lubricant compositions with enhanced stability and properties using extreme pressure agents.

Problems solved by technology

However, sulfuirized extreme pressure agents are often difficult to handle, highly odiferous, expensive, or require the presence of compatibilizing components when used in lubricant formulations.
In particular, it has been found, quite surprisingly, that combining sulfurized extreme pressure agents having a relatively low viscosity with other components of an additive concentrate for a gear lubricant after combining organic acid and amine components substantially increases the solubility of the components in a finished lubricant composition.

Method used

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  • Lubricant formulations containing extreme pressure agents
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  • Lubricant formulations containing extreme pressure agents

Examples

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example 2

[0081] In this example, the order of mixing the foregoing components and amounts of each component are given in Table 2. This example represents a conventional method for making additive concentrates for use in lubricant formulations.

TABLE 2Order ofAdditionComponentWt. %1Sulfurized isobutylene 0.0-20.02Primary amine2.0-7.03Tolytrizole0.0-0.34Mineral oil diluent 5.0-10.05Thiadiazole corrosion inhibitor2.0-5.06Sulfurized isobutylene 0.0-95.07Acid phosphate 5.0-15.08Polyacrylate antifoam agent1.0-5.09Carboxylic acid rust inhibitor0.0-2.0

example 3

[0082] In following example, the order of addition of the foregoing components and amounts of each component are given in Table 3. This example represents an exemplary embodiment of the disclosure, but is not intended to limit the disclosure.

TABLE 3Order ofAdditionComponentWt. %1Tolytrizole0.0-0.32Primary amine2.0-7.03Thiadiazole corrosion inhibitor2.0-5.04Acid phosphate 5.0-15.05Polyacrylate antifoam agent1.0-5.06Mineral oil diluent 5.0-10.07Carboxylic acid rust inhibitor0.0-2.08Sulfurized isobutylene50.0-95.0

[0083] In Table 2, the sulfurized isobutylene was added in the first and sixth steps for preparing the additive package. In Table 3, the sulfurized isobutylene (SIB) was added in the last step of the mixture process for the additive package. Each of the additive packages prepared in Tables 2 and 3 were combined with a polyalphaolefin-based gear oil and with a Group II base oil to provide a lubricating oil composition containing about 4 percent by weight of the additive packa...

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Abstract

A method for improving the solubility of a sulfurized extreme pressure agent in a lubricant composition and improved lubricant compositions and uses therefor. The method includes pre-blending organic acid and amine components of a lubricant additive package for the lubricant composition to provide a premixture of organic acid and amine components. The premixture is combined with a sulfurized extreme pressure agent having a viscosity of less than about 5.5 centistokes at 100° C. to provide a lubricant additive package. By use of the foregoing process, a turbidity characteristic of the lubricant composition containing the additive package is lower than a turbidity characteristic of a lubricant composition that is made by combining the organic acid and amine components with the sulfurized extreme pressure agent in the absence of the premixture.

Description

FIELD OF THE DISCLOSURE [0001] The disclosure relates to lubricant formulations and in particular to lubricant formulations having enhanced stability and to methods for making lubricants having improved properties. BACKGROUND AND SUMMARY [0002] Lubricants may be formulated to contain extreme pressure agents for use in particular applications. A wide variety of extreme pressure agents exist. Particularly useful extreme pressure agents are those containing sulfur. However, sulfuirized extreme pressure agents are often difficult to handle, highly odiferous, expensive, or require the presence of compatibilizing components when used in lubricant formulations. [0003] Accordingly, there continues to be a need for improved lubricant formulations containing extreme pressure components. [0004] With regard to the foregoing, a method for improving the solubility of a sulfurized extreme pressure agent in a lubricant composition and improved lubricant compositions and uses therefor are provided. ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M135/06
CPCC10M141/08C10M169/04C10M169/044C10M2203/1006C10M2205/0206C10M2207/10C10M2209/084C10M2215/02C10M2215/223C10M2219/022C10M2219/106C10M2223/04C10N2220/022C10N2230/66C10N2240/04C10N2020/02C10N2040/04C10N2030/66C10M7/00C10M135/02
Inventor MILNER, JEFFREY L.KADKHODAYAN, ABBASDOERFLER, DARRIN KEITH
Owner AFTON CHEMICAL
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