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A kind of improver for lubricating oil and preparation process thereof

A preparation process and improver technology, applied in the field of lubricating oil improver and its preparation process, can solve the problems of unsuitable for multi-grade internal combustion engine oil, limited application range, poor low temperature fluidity, etc., and achieve good shear stability, anti-corrosion Excellent shear performance and improved oxidation resistance

Active Publication Date: 2022-02-01
中沃能源(湖北)集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the lubricating oil industry, a single type of viscosity index improver is added to the lubricating oil. Because one viscosity index improver has advantages in one aspect and has disadvantages in others, for example, polyisobutylene PIB has excellent shear resistance. It has certain anti-oxidation properties, but its low-temperature fluidity is relatively poor, so it is not suitable for direct use in multi-grade internal combustion engine oils. The star-shaped hydrogenated styrene diene copolymer HSD viscosity index improver has improved low-temperature fluidity and improved shear resistance. , the disadvantage is that it depends on imports and the price is high, so the scope of use is limited

Method used

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  • A kind of improver for lubricating oil and preparation process thereof
  • A kind of improver for lubricating oil and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An improver for lubricating oil, comprising the following components:

[0034] The mass fraction is 0.4% of star-shaped hydrogenated styrene diene copolymer and 10% of polyisobutylene, and the rest is base oil. Among them, the molecular weight of star-shaped hydrogenated styrene diene copolymer is 80,000-400,000; the molecular weight of polyisobutylene is 200-5,000.

[0035] A preparation process for a lubricating oil improver, comprising the following steps:

[0036] S1. Put the star-shaped hydrogenated styrene diene copolymer with the above mass fraction into the base oil with the above mass fraction at 110°C under a nitrogen atmosphere, heat and stir until the two are completely fused to form a flowing transparent glue; and, Before inputting, cut and crush the star-shaped hydrogenated styrene diene copolymer solid to make it dissolve quickly;

[0037] S2. Cool down the transparent glue with the above mass fraction to 50° C., put polyisobutylene into it, keep warm a...

Embodiment 2

[0040] An improver for lubricating oil, comprising the following components:

[0041] The mass fraction is 0.08% of star-shaped hydrogenated styrene diene copolymer and 30% of polyisobutylene, and the rest is base oil. Among them, the molecular weight of star-shaped hydrogenated styrene diene copolymer is 80,000-400,000; the molecular weight of polyisobutylene is 200-5,000.

[0042] A preparation process for a lubricating oil improver, comprising the following steps:

[0043]S1. Put the star-shaped hydrogenated styrene diene copolymer with the above mass fraction into the base oil with the above mass fraction at 120°C under a nitrogen atmosphere, heat and stir until the two are completely fused to form a flowing transparent glue; and, Before inputting, cut and crush the star-shaped hydrogenated styrene diene copolymer solid to make it dissolve quickly;

[0044] S2. Cool down the above mass fraction of transparent glue to 60° C., put polyisobutylene into it, heat and stir unt...

Embodiment 3

[0047] An improver for lubricating oil, comprising the following components:

[0048] The mass fraction is 1% star-shaped hydrogenated styrene diene copolymer and 60% polyisobutylene, and the rest is base oil. Among them, the molecular weight of star-shaped hydrogenated styrene diene copolymer is 80,000-400,000; the molecular weight of polyisobutylene is 200-5,000.

[0049] A preparation process for a lubricating oil improver, comprising the following steps:

[0050] S1. Put the star-shaped hydrogenated styrene diene copolymer with the above mass fraction into the base oil with the above mass fraction at 130°C under a nitrogen atmosphere, heat and stir until the two are completely fused to form a flowing transparent glue; and, Before inputting, cut and crush the star-shaped hydrogenated styrene diene copolymer solid to make it dissolve quickly;

[0051] S2. Cool down the transparent glue with the above mass fraction to 70° C., put polyisobutylene into it, keep warm and stir ...

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Abstract

The invention discloses an improver for lubricating oil, which comprises the following components: a star-shaped hydrogenated styrene diene copolymer with a mass fraction of 0.4-1%, polyisobutylene with a mass fraction of 10-60%, and the rest being base oil; wherein, The molecular weight of star hydrogenated styrene diene copolymer is 8-400,000; the molecular weight of polyisobutylene is 200-5000. The improver for lubricating oil of the present invention is used in lubricating oil, so that the lubricating oil has good shear resistance, good low-temperature fluidity, excellent oxidation resistance, and a viscosity index improver with improved cleaning and dispersibility, and the price is relatively traditional. Hydrogenated styrene diene copolymer has obvious advantages, saving about 25% of cost.

Description

technical field [0001] The invention relates to the field of improvers for lubricating oil. More specifically, the invention relates to a lubricating oil improver and a preparation process thereof. Background technique [0002] At present, in the lubricating oil industry, a single type of viscosity index improver is added to the lubricating oil. Because one viscosity index improver has advantages in one aspect and has disadvantages in others, for example, polyisobutylene PIB has excellent shear resistance. It has certain anti-oxidation properties, but its low-temperature fluidity is relatively poor, so it is not suitable for direct use in multi-grade internal combustion engine oils. The star-shaped hydrogenated styrene diene copolymer HSD viscosity index improver has improved low-temperature fluidity and improved shear resistance. , the disadvantage is that it depends on imports, and the price is high, so the scope of use is limited. Contents of the invention [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M143/00C10N30/06
CPCC10M143/00C10M2205/026C10M2205/04C10N2030/06C10M2205/06
Inventor 张名雄毛凯
Owner 中沃能源(湖北)集团股份有限公司
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