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Lubricating composition

A technology of lubricating composition and methyl group, applied in lubricating composition, petroleum industry, etc., can solve problems such as not being able to reach the viscosity grade, and the effect of improving the viscosity index is small, and achieve the effect of preventing oil film damage and good water compatibility

Inactive Publication Date: 2012-05-16
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if α is smaller than β, the problem arises that even if the viscosity increase is excessive at low temperature, the viscosity increase at high temperature will not reach the target, so the viscosity index increase effect is small, and as a result, a large amount of polymer must be added, otherwise the desired result cannot be achieved. required viscosity grade

Method used

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  • Lubricating composition
  • Lubricating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0122] As the lubricating composition of Examples 1-3, the lubricating composition was prepared by mixing the following materials to obtain a viscosity grade of 75W-80: 10% of hydroxyl-containing polymethacrylate (PA), 7.5wt% Hydroxyl-free common polymethacrylate (PC), 1% pour point depressant, and an additional amount of sulfur-phosphorus-based extreme pressure agent, classified according to oil performance based on GL-3 ( Example 1), GL-4 (Example 2) and G-5 (Example 3). For these lubricating compositions, the kinematic viscosity (Vk100) at 100°C and the kinematic viscosity (Vk40) and viscosity index (VI) at 40°C were measured, and determined at a temperature of 75°C ( Wear scar diameter (mm) at 1200 rpm) and at a temperature of 80°C (1500 rpm). The results are shown in Table 2.

[0123] Table 2

[0124] Example 1

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Abstract

The present invention provides a lubricating composition comprising: a base oil; and a viscosity index improver containing poly (meth) acrylate having hydroxyl groups in the structure and having a hydroxyl value of from 22 to 37.

Description

technical field [0001] The present invention relates to a lubricating composition having excellent water compatibility, especially a lubricating composition suitable for use as a lubricating composition for a driving system of vehicles such as automobiles, agricultural vehicles and construction machinery. Background technique [0002] As lubricating compositions for vehicles such as automobiles or for industrial use, lubricating compositions are sought which have a high viscosity index and whose viscosity does not change over as wide a temperature range as possible. For this lubricating composition, a viscosity index improver such as poly(meth)acrylate is blended with a base oil such as mineral oil or synthetic oil in the lubricating composition used to obtain a high viscosity index lubricating composition, wherein Poly(meth)acrylates containing multiple functional groups are used, and poly(meth)acrylates containing hydroxyl groups are also used. [0003] The lubricating co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C10N40/04
CPCC10N2230/26C10N2240/04C10M145/14C10M2209/04C10M2209/084C10N2030/26C10N2040/04C10M2209/103
Inventor 长富悦史田崎裕之T·和喜造诺
Owner SHELL INT RES MAATSCHAPPIJ BV