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Viscosity index improver composition and application thereof

A viscosity index and improver technology, applied in lubricating compositions, petroleum industry, etc.

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the existing single viscosity index improver and provide a viscosity index improver composition with better shear stability and low temperature performance

Method used

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  • Viscosity index improver composition and application thereof
  • Viscosity index improver composition and application thereof
  • Viscosity index improver composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix polymethacrylate, polyisobutylene and base oil in a mass ratio of 50:50:0, and stir them uniformly at 80°C with mechanical or manual stirring to prepare viscosity index improver composition 1, in which polymethyl The main component of acrylate type viscosity index improver is polymethacrylate (VISCOPLEX-0-120, molecular weight about 40000), and the main component of polyisobutylene type viscosity index improver is polyisobutylene (JINEX6240, molecular weight about 2400). The obtained viscosity index improver composition 1 is added in the III4 hydrogenated base oil according to the amount of 26%, and the 100 ℃ kinematic viscosity of the oil product, the shear decline rate (KRL test 20h) and the pour point are measured. In addition, the Add polymethacrylate (VISCOPLEX-0-120) to III4 hydrogenated base oil and add polyisobutylene poly(JINEX6240) oil to III4 hydrogenated base oil for determination. The test results are shown in Table 1.

[0027] Table 1 Viscosity Index I...

Embodiment 2

[0033] Mix polymethacrylate, polyisobutylene and base oil in a mass ratio of 10:80:10, and stir them evenly by mechanical or manual at 90°C to prepare viscosity index improver composition 2, in which polymethyl The main component of acrylate type viscosity index improver is polymethacrylate (VISCOPLEX-0-101, molecular weight about 30000), the main component of polyisobutylene type viscosity index improver is polyisobutylene (JINEX6130, molecular weight about 1300), the base oil is Group II 6 hydrogenated base oil. The viscosity index improver composition 2 that will obtain is joined in the PAO6 synthetic base oil according to the amount of 19%, and the 100 ℃ kinematic viscosity of measuring oil product, shear rate of decline (KRL test 20h) and pour point, in addition, also to PAO6 Polymethacrylate (VISCOPLEX-0-101) was added to the synthetic base oil and polyisobutylene poly(JINEX6130) oil was added to the PAO6 synthetic base oil for determination. The test results are shown i...

Embodiment 3

[0041] Mix polymethacrylate, polyisobutylene and base oil in a mass ratio of 80:10:10, and stir them uniformly at 70°C with mechanical or manual stirring to prepare viscosity index improver composition 3, in which polymethyl The main component of acrylate type viscosity index improver is polymethacrylate (LUBRIZOL 7702, molecular weight about 30000), the main component of polyisobutylene type viscosity index improver is polyisobutylene (LUBRIZOL 3174, molecular weight about 1500), and the base oil is type III 6 Hydrogenated base oil. The resulting viscosity index improver composition 3 was added to Type III 6 hydrogenated base oil in an amount of 25%, and the kinematic viscosity at 100° C., shear drop rate (KRL test 20h) and pour point of the oil were measured. In addition, The addition of polymethacrylate (LUBRIZOL 7702) to Type III 6 hydrogenated base oil and the addition of polyisobutylene poly(LUBRIZOL 3174) to Type III 6 hydrogenated base oil were also tested. The test re...

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Abstract

The invention provides a viscosity index improver composition, comprising the following components by weight: 10-90% of polymethacrylate, 10-90% of polyisobutylene and 0-20% of base oil. The viscosity index improver composition provided by the invention can be used in gearbox or vehicle gear oil, and has a good shearing stability and low temperature performance.

Description

technical field [0001] The present invention relates to a lubricating oil composition, in particular to a viscosity index improver composition for lubricating oil and its application. Background technique [0002] Viscosity index improvers, also known as thickeners and tackifiers, are mainly composed of high molecular polymers with branched or long chain structures. These special structures enable the lubricating oil to expand the branched chain at high temperature to increase the viscosity; at low temperature, the branched chain shrinks to reduce the increase in viscosity, thereby improving the viscosity-temperature characteristics of the lubricating oil. However, the introduction of viscosity index improvers has a negative impact on the shear stability of lubricating oils, and shear stability is an important property of lubricating oil stability, especially for transmission oils and vehicle gear oils, SAE J306 specifications for oil The shear stability of the product has ...

Claims

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Application Information

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IPC IPC(8): C10M157/10C10N30/02C10N40/04
Inventor 徐魏水琳章晶周轶薛玉苓张国茹申宝武谭海港刘斌宋朝新
Owner CHINA PETROLEUM & CHEM CORP
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