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Modifier for the combined lubricating oil and preparation method of modifier

A technology of lubricating oil and improver, which is applied in the direction of lubricating compositions, chemical instruments and methods, mixers, etc., which can solve the problem of poor shear resistance and oxidation resistance, which affects the high-temperature cleaning and dispersing properties of oil products, and is not suitable for many To solve problems such as high-grade internal combustion engine oil, achieve the effect of improving the cleaning and dispersing performance, improving the anti-oxidation performance, and saving the cost of storage and transportation

Active Publication Date: 2019-05-24
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

[0003] 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 a certain anti-oxidation performance, but its low-temperature fluidity is relatively poor, so it is not suitable for direct use in multi-grade internal combustion engine oils. Semi-crystalline OCP viscosity index improver has improved low-temperature fluidity, but its shear resistance and oxidation resistance are not good. If the dosage is too large, it will affect the high-temperature cleaning and dispersing properties of the oil
OCP is subject to high-temperature oxidation during use, and polymer aggregation, decomposition, oxidation, etc. will cause a series of problems such as increased oil viscosity, increased acid value, decreased cleaning and dispersibility, and increased carbon deposits, which will ultimately affect the service life of the oil.

Method used

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  • Modifier for the combined lubricating oil and preparation method of modifier
  • Modifier for the combined lubricating oil and preparation method of modifier
  • Modifier for the combined lubricating oil and preparation method of modifier

Examples

Experimental program
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Effect test

preparation example Construction

[0048] A kind of preparation method of the improver of described combined lubricating oil comprises the following steps:

[0049] S1, heat up the base oil in the above mass ratio to 110-130°C in the blending tank, add the solid block of the above mass ratio of ethylene-propylene copolymer under the protection of nitrogen, and stir at 110-130°C until ethylene-propylene copolymerization The solid block of the substance and the base oil are completely fused to form a transparent fluid glue;

[0050] S2, at a temperature of 50-70°C, add polyisobutylene in the above mass ratio to the glue obtained in step S1, fully stir and maintain the temperature until the polyisobutylene is completely fused to form a transparent flowing mixed glue;

[0051] S3, cooling the mixed glue solution obtained in step S2 to normal temperature to obtain a combination lubricating oil improver.

[0052] In this technical solution, compared with the glue-like OCP, the solid OCP can prepare a combined lubric...

Embodiment 1

[0080] Preparation of compound 1:

[0081] S1, heat up the base oil with a mass ratio of 49.5% to 110°C, add a solid block of ethylene-propylene copolymer with a mass ratio of 0.5% under nitrogen protection, and stir at 110°C until the solid block of ethylene-propylene copolymer Completely blend with base oil and form a transparent fluid glue;

[0082] S2, at a temperature of 50°C, adding polyisobutylene with a mass ratio of 50% to the glue obtained in step S1, fully stirring and maintaining the temperature until the polyisobutylene is completely fused to form a transparent flowing mixed glue;

[0083] S3, cooling the mixed glue solution obtained in step S2 to normal temperature to obtain compound 1;

[0084] Among them, the molecular weight of polyisobutylene is 1,000, and the molecular weight of semi-crystalline ethylene-propylene copolymer is 100,000.

Embodiment 2

[0086] Preparation of compound 2:

[0087]S1, heat up the base oil with a mass ratio of 89.7% to 120°C, add a solid block of ethylene-propylene copolymer with a mass ratio of 0.3% under nitrogen protection, and stir at 120°C until the solid block of ethylene-propylene copolymer Completely blend with base oil and form a transparent fluid glue;

[0088] S2, at a temperature of 60° C., adding polyisobutylene with a mass ratio of 10% to the glue obtained in step S1, fully stirring and maintaining the temperature until the polyisobutylene is completely fused to form a transparent flowing mixed glue;

[0089] S3, cooling the mixed glue solution obtained in step S2 to normal temperature to obtain compound 2;

[0090] Among them, the molecular weight of polyisobutylene is 200, and the molecular weight of semi-crystalline ethylene-propylene copolymer is 50,000.

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Abstract

The invention discloses a modifier for combined lubricating oil and a preparation method of the modifier. The modifier for the combined lubricating oil is prepared from, by mass, 0.3-1% of a semi-crystalline ethylene propylene copolymer, 10-60% of polyisobutene and the balance base oil. The preparation method of the modifier for the combined lubricating oil comprises the steps that S1, a solid block of the ethylene propylene copolymer is added under the protection of nitrogen, stirring is carried out at 110-130 DEG C until the solid block of the ethylene propylene copolymer and the base oil are completely mixed and form a transparent flowing glue solution; S2, the polyisobutene is added at 50-70 DEG C until completely mixed to form a transparent flowing mixed glue solution; S3, the mixed glue solution obtained in S2 is cooled to the normal temperature, and the modifier for the combined lubricating oil is obtained. The modifier for the combined lubricating oil has the advantages of goodlow-temperature fluidity and good shear resistance, and can be widely applied to the technical field of lubricating oil improvers.

Description

technical field [0001] The invention relates to the technical field of lubricating oil improvers. More specifically, the present invention relates to a combination lubricating oil improver and a preparation method thereof. Background technique [0002] In order to improve the viscosity-temperature performance of lubricating oil, polymer compounds were added to lubricating oil in the 1930s, and polyisobutylene PIB appeared in lubricating oil in the mid-1930s. However, due to poor low-temperature fluidity, it is not suitable for direct use in multi-stage internal combustion engines. Oil, ethylene propylene copolymer OCP appeared in the 1960s and 1970s. Its low-temperature fluidity has improved, but its shear resistance is average. The shear resistance is related to its molecular weight. The shear resistance of larger molecular weight is poor. The hydrogenated styrene-diene copolymer HSD has been developed, which has better low-temperature fluidity and improved shear resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00B01F13/10B01F1/00C10N30/08C10N30/02C10N30/04C10N30/10C10N30/06
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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