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Lubricant composition

一种润滑油组合物、润滑油基础油的技术，应用在润滑组合物、石油工业、基料等方向，能够解决剪切稳定性降低等问题，达到优异低温粘度特性、优异剪切稳定性和高温度粘度特性的效果

Active Publication Date: 2017-05-31
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, for PAO, ethylene-propylene copolymer, and the like used in lubricating oil compositions, there is a trade-off relationship in which temperature-viscosity characteristics improve but shear stability decreases as the molecular weight increases.
In this regard, there is room for improvement from the viewpoint of achieving both shear stability and temperature-viscosity characteristics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0259] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited by these examples.

[0260] [Evaluation method]

[0261] In the following examples and comparative examples, etc., the physical properties and the like of the ethylene-α-olefin copolymer and the lubricating oil composition were measured by the following methods.

[0262]

[0263] Using a Fourier transform infrared spectrophotometer FT / IR-610 or FT / IR-6100 manufactured by JASCO Corporation, calculate the 721cm value based on the rocking vibration of long-chain methylene -1 Absorption near 1155cm with propylene-based backbone vibration -1 The absorbance ratio of the nearby absorbance (D1155cm -1 / D721cm -1 ), and the ethylene content (weight %) was calculated using a calibration curve (prepared using standard samples in ASTM D3900) prepared in advance. Next, using the obtained ethylene content (weight%), the ethylene content (mol%) was c...

Synthetic example 1

[0293] [Methylphenylmethylene (η 5 - cyclopentadienyl) (η 5 Synthesis of -2,7-di-tert-butylfluorenyl)]zirconium dichloride

[0294] (i) Synthesis of 6-methyl-6-phenylfulvene (fulvene)

[0295] Under a nitrogen atmosphere, 7.3 g (101.6 mmol) of lithium cyclopentadiene and 100 mL of anhydrous tetrahydrofuran were added to a 200 mL three-necked flask and stirred. The solution was cooled in an ice bath, and 15.0 g (111.8 mmol) of acetophenone was added dropwise. After stirring at room temperature for 20 hours, the resulting solution was quenched with dilute aqueous hydrochloric acid. 100 mL of hexane was added to extract the soluble components, and the organic layer was washed with water and saturated brine, and dried over anhydrous magnesium sulfate. Then, the solvent was distilled off, and the obtained viscous liquid was separated by column chromatography (hexane) to obtain the target product (red viscous liquid).

[0296] (ii) Synthesis of methyl(cyclopentadienyl)(2,7-di-...

Embodiment 1

[0340] 28.0% by mass of the copolymer obtained in Polymerization Example 1 as the ethylene-α-olefin copolymer (B), 15.0% by mass of DIDA as the lubricating base oil (A), and the extreme pressure additive package (EP) It blended so that it might become 6.5 mass %, and further added PAO-6 as a lubricating oil base oil (A) to this so that the whole lubricating oil composition might become 100 mass %, and the lubricating oil composition was prepared.

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Abstract

To provide a lubricant having both exceptional shear stability and low-temperature viscosity characteristics from the standpoint of fuel economy and energy savings in automobiles and industrial machinery. A lubricant composition containing (A) a lubricant base oil having a kinematic viscosity of 1-10 mm2 / s at 100 DEG C, and (B) an ethylene-alpha-olefin copolymer having (B1) a peak top molecular weight of 3,000-10,000, (B2) no melting peak, (B3) a B value of 1.1 or higher, and (B4) a kinematic viscosity of 140-500 mm2 / s at 100 DEG C, the lubricant composition having a kinematic viscosity of 20 mm2 / s or lower at 100 DEG C and a peak top at a molecular weight of 3,000-10,000, the weight fraction of components having a molecular weight of 20,000 with respect to high-molecular-weight components having at least the molecular weight giving this peak top being 1-10%.

Description

technical field [0001] The present invention relates to a lubricating oil composition which is excellent in temperature viscosity properties and low temperature viscosity properties, and has extremely excellent shear stability. Background technique [0002] For lubricating oils such as gear oils, transmission oils, hydraulic oils, and greases, not only performance such as protection and heat dissipation for internal combustion engines and machine tools, but also wear resistance and heat resistance are required , sludge resistance (sludge resistance), lubricating oil consumption characteristics, fuel economy and other properties. Furthermore, in recent years, various performance requirements have been increasing along with the improvement in performance, output, and severer operating conditions of internal combustion engines and industrial machines used. Especially recently, the environment in which lubricating oil is used has become more and more severe, but on the other ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M143/00C10M143/04C10N20/02C10N20/04C10N30/02C10N30/06C10N40/04
CPCC10M169/041C10M107/06C10M2203/1025C10M2205/022C10M2205/0285C10M2207/2825C10M143/04C10N2020/04C10N2020/019C10N2020/02C10N2030/02C10N2030/54C10N2030/68C10N2040/045C10N2040/044C10N2040/042C10N2040/04C10M2205/0225C10M2205/0245C10M2205/024
Inventor 阿部昌太金重良辅
Owner MITSUI CHEM INC
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