Urea-based lubricating grease composition

A technology of grease composition and urea-based grease, which is applied in the fields of roller bearings and electric power steering devices, and can solve problems such as low torque performance

Active Publication Date: 2008-01-16
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] But with the ever-increasing installation requirements on automobiles, and the increased power assist, improved durability and low-torque performance of electric power steering, as well as the amazing progress in its other characteristics, the use of lithium-based grease, which has been widely used so far, is no longer necessary. It is possible to obtain satisfactory durability, it is no longer possible to satisfactorily provide stable steering performance from high temperature to low temperature, and there is also a problem of low torque performance in a low temperature environment

Method used

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  • Urea-based lubricating grease composition

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Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0063] The base oil and the diisocyanate were placed in an airtight grease trial production device according to the compounding ratio shown in Table 1, and heated to 60° C. while stirring. Starting materials prepared by mixing and dissolving various amines and base oils were fed from a hopper, and the mixture was allowed to react. In order to complete the reaction, it was heated to 170° C. while stirring, maintained for 30 minutes, then cooled to 80° C., and the additives in the compounding ratio shown in Table 1 were added. As an oxidation inhibitor, an additional 1.0% of octyldianiline was added (ie in addition to the rest of the formulation which was considered 100%). The grease was obtained by processing in three rolls after allowing to cool to about 60°C.

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Abstract

A urea-based lubricating grease composition comprising (a) as a thickener, a diurea compound which is an alkyldiurea compound having an average molecular weight in the range of from 600 to 700, wherein in the range of from 25 to 60 mole % of the total alkyl groups is an unsaturated component, and the total amine value of the primary amine constituting the raw material is in the range of from 250 to 350, (b) a base oil having as its main component one or more synthetic hydrocarbon oil(s) having a pour point of -40 DEG C or below, wherein the kinematic viscosity of the base oil is 6000 mm<2> / sec or less at -40 DEG C, and (c) as additives, a mixture comprising an oil-soluble organic molybdenum complex, an oil-soluble organic zinc compound of dithiocarbamic acid, an oil-soluble organic zinc compound of dithiophosphoric acid and an inorganic sulphur compound; and a roller bearing and electric power steering device wherein the said lubricating grease composition is used as the lubricant.

Description

technical field [0001] The present invention relates to a urea-based grease composition and a roller bearing and an electric power steering device in which the urea-based grease composition is used as a lubricant. Background technique [0002] In recent years, urea greases have been used in many fields because they have a high dropping point, excellent thermal stability and excellent wear resistance and lubricating properties. [0003] In the vehicle industry, cases in which the superior performance of urea greases are utilized are increasing because of higher demands for heat resistance, wear resistance and friction performance for various vehicle components, including CVJ (Constant Velocity Joints) value. However, due to the tremendous progress in vehicle technology and the yearly increase in the values ​​required for each individual vehicle component, the status quo cannot simply be maintained. [0004] In particular, technological innovations are evident in automotive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10N10/04C10N10/12C10N20/02C10N40/02C10N40/06C10N50/10
CPCC10N2210/02C10N2220/021C10M2215/1026C10M169/06C10N2220/027C10M2205/0225C10M2201/065C10N2210/06C10N2240/06C10M2205/0265C10M2219/068C10N2220/026C10N2230/06C10M2201/084C10M2205/0285C10M2223/045C10N2240/02C10M2203/1006C10N2220/022C10N2250/10C10N2240/046C10N2010/04C10N2010/12C10N2020/02C10N2020/04C10N2030/06C10N2040/02C10N2040/06C10N2050/10C10N2020/067C10N2020/069C10N2040/046
Inventor 浅仓敏弘川村靖川村泰氏尾崎幸洋杉森茂幸益森隆一
Owner SHELL INT RES MAATSCHAPPIJ BV
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