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Lubricating oil composition and method for producing same

A lubricating oil composition and lubricating oil technology, applied in lubricating compositions, petroleum industry, base materials, etc., can solve problems such as poor shear stability, achieve excellent heat resistance and oxidation stability, save resources, and save energy Effect

Pending Publication Date: 2021-11-05
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general lubricating oil applications, in order to obtain excellent low-temperature characteristics, it is effective to suppress the concentration of the polymer to a low value as much as possible, and it is also advantageous in terms of economy. In view of the above reasons, it is known that there are A method of using a polymer with a high molecular weight as much as possible, however, if the molecular weight is increased, there is a problem that the shear stability deteriorates

Method used

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  • Lubricating oil composition and method for producing same
  • Lubricating oil composition and method for producing same
  • Lubricating oil composition and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0254] The kinematic viscosity at 100°C of Polymer 3 (54.0% by weight) obtained in Polymerization Example 3 as an ethylene-propylene copolymer (A) classified into API group (IV) as a lubricating oil base agent was 5.825mm 2 / s polyalphaolefin (NESTE OIL company NEXBASE 2006) (33.3% by weight), fatty acid ester DIDA (manufactured by Daihachi Chemical Co., Ltd.) (10.0% by weight) classified into API group (V), extreme pressure additive HITEC307 ( (manufactured by AFTON) (2.7 parts by weight) was blended and adjusted to a viscosity equivalent to ISO220. Table 2 shows the lubricating oil physical properties of the blended oils.

Embodiment 2

[0256] In place of 54.0% by weight of Polymer 3, 47.0% by weight of Polymer 1 obtained in Polymerization Example 1 was used, and the compounding amount of polyalphaolefin (NEXBASE 2006) was set to 40.3% by weight, and the procedure was the same as in Example 1. Blend and adjust to a viscosity equivalent to ISO220. Table 2 shows the lubricating oil physical properties of the blended oils.

Embodiment 3

[0258] Except that the blending amount of polymer 3 was 64.0% by weight and the blending amount of polyalphaolefin (NEXBASE 2006) was 23.3% by weight, it was blended in the same manner as in Example 1 to adjust to a viscosity corresponding to ISO320. Table 2 shows the lubricating oil physical properties of the blended oils.

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Abstract

The present invention provides a lubricating oil composition containing a polymer for improving viscosity, the polymer having little decrease in viscosity due to shear, keeping viscosity elevation at low temperatures low, and having exceptional low-temperature characteristics. The present invention is a lubricating oil composition characterized by containing: 30-90 wt% of a liquid random copolymer (A) of ethylene and an alpha-olefin, the copolymer being produced by through specific method; and 10-70 wt% of a lubricating oil base comprising one or more components selected from specific synthetic oils (B) or mineral oils (C) (where the total of components (A), (B), and (C) is 100 wt%).

Description

technical field [0001] The present invention relates to a lubricating oil composition containing an ethylene-α-olefin copolymer and a method for producing the same. Background technique [0002] Petroleum products generally have the so-called temperature dependence of viscosity, that is, when the temperature changes, the viscosity changes greatly. For example, a lubricating oil whose viscosity has little temperature dependence is preferable. Therefore, in lubricating oil, in order to reduce the temperature dependence of viscosity, a certain polymer soluble in lubricating oil base can be used as a viscosity modifier. In recent years, α-olefin polymers have been widely used as such viscosity modifiers, and various improvements have been made to further improve the performance balance of lubricating oils. (Patent Document 1) [0003] Viscosity index improvers such as those mentioned above are generally used to maintain an appropriate viscosity at high temperatures. Recently,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M105/32C10M107/02C10M143/00C10M171/02C10N20/00C10N20/02C10N20/04C10N30/02C10N30/06C10N30/10C10N40/04C10M101/02
CPCC10N2020/02C10M2205/0225C10M2205/0285C10M2207/2815C10M2203/1025C10N2040/04C10M2209/084C08F210/06C08F4/65912C08F4/65908C08F210/16C10M169/04C10M2205/022C10N2020/011C10N2070/00C10N2020/04C10N2020/065C10N2030/02C10N2030/10C10N2030/08C10N2030/68C10M2205/0245C08F2500/02C08F2500/03C08F2500/17C08F2/06C08F4/65927C10M2205/026C10M2205/028C10M143/00C10M101/02C10M105/32C10M107/02C10M171/02C08F4/6592C10N2030/06C08F210/02C10M107/04C10M107/06C10M111/02C10M111/04C10M2203/003C10M2207/2805
Inventor 阿部昌太
Owner MITSUI CHEM INC
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