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Poly(meth)acrylate viscosity index improver, and lubricating oil composition and lubricating oil additive containing said viscosity index improver

A viscosity index improvement, acrylate technology, applied in lubricating compositions, petroleum industry, etc., can solve problems such as sintering and oil leakage, and achieve the effect of reducing friction loss

Inactive Publication Date: 2015-03-11
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the viscosity of the lubricating oil for transmission is reduced, other problems such as oil leakage and burning may occur

Method used

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  • Poly(meth)acrylate viscosity index improver, and lubricating oil composition and lubricating oil additive containing said viscosity index improver
  • Poly(meth)acrylate viscosity index improver, and lubricating oil composition and lubricating oil additive containing said viscosity index improver
  • Poly(meth)acrylate viscosity index improver, and lubricating oil composition and lubricating oil additive containing said viscosity index improver

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0039] [First Embodiment: First Poly(meth)acrylate Viscosity Index Improver]

[0040] The poly(meth)acrylate viscosity index improver of 1st Embodiment has a polymer chain containing the structural unit represented by following General formula (1). The poly(meth)acrylate-based viscosity index improver has a weight-average molecular weight Mw (hereinafter, sometimes simply referred to as "Mw") of 100,000 or more, and the weight-average molecular weight Mw and the number-average molecular weight Mn (hereinafter, sometimes simply referred to as "Mn".) The ratio Mw / Mn (hereinafter, may be simply referred to as "Mw / Mn") is 1.6 or less.

[0041]

[0042] [In formula (1), R 1 represents hydrogen or methyl, R 2 represents an alkyl group having 1 to 36 carbon atoms. ]

[0043] R 1 Either hydrogen or methyl may be used, methyl is preferred.

[0044] as R 2 The number of carbon atoms of the alkyl group is 1-36 as described above, preferably 1-30, more preferably 1-26, and still...

no. 2 approach

[0066] [Second Embodiment: Lubricating Oil Additive]

[0067] The lubricating oil additive according to the second embodiment of the present invention contains a poly(meth)acrylate viscosity index improver having a structure represented by the above general formula (1) The poly(meth)acrylate-based viscosity index improver has a weight-average molecular weight Mw of 100,000 or more, and a ratio Mw / Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of 1.6 or less. It should be noted that the poly(meth)acrylate-based viscosity index improver in this embodiment is the same as the viscosity index improver in the above-mentioned first embodiment, and repeated descriptions are omitted here.

[0068] The lubricating oil additive may contain only the above-mentioned poly(meth)acrylate viscosity index improver, or may be a mixture of the viscosity index improver and other additives (ie, an additive composition). When the lubricating oil additive is a...

no. 3 approach

[0080] [Third Embodiment: Lubricating Oil Composition]

[0081] The lubricating oil composition of the third embodiment contains a lubricating oil base oil and a poly(meth)acrylate viscosity index improver, and the poly(meth)acrylate viscosity index improver has The polymer chain of the structural unit shown, the weight average molecular weight Mw of the poly(meth)acrylate viscosity index improver is 100,000 or more, and the ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn is 1.6 or less. Here, the lubricating oil composition of the present embodiment includes an embodiment including the lubricating oil base oil and the lubricating oil additive of the above-mentioned second embodiment. The poly(meth)acrylate-based viscosity index improver in this embodiment is the same as the poly(meth)acrylate-based viscosity index improver in the above-mentioned first embodiment and second embodiment, and in addition, in the lubricating oil comp...

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Abstract

The present invention provides a poly(meth)acrylate viscosity index improver that has a polymer chain containing a structural unit represented by general formula (1), and that has a weight average molecular weight (Mw) of at least 100,000 and a ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of at most 1.6. [In formula (1), R1 represents hydrogen or a methyl group, and R2 represents a C1-36 alkyl group.]

Description

technical field [0001] The present invention relates to a poly(meth)acrylate viscosity index improver, a lubricating oil additive and a lubricating oil composition containing the viscosity index improver. Background technique [0002] Conventionally, in the field of lubricating oil, studies have been made on improvement of lubricating oil from the viewpoint of energy saving. Especially in recent years, the tendency to protect the global environment has been increasing, and the demand for improving the energy-saving performance of lubricating oils has further increased. [0003] For example, in the case of lubricating oil used in internal combustion engines such as automobile engines (also referred to as "lubricating oil for internal combustion engines" or "engine oil"), as one of means for improving fuel economy, it is known that by adding A method in which a viscosity index improver is added to an oil base oil to increase the viscosity index of a lubricating oil. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C10N30/02
CPCC10N2230/02C10N2240/04C10N2220/021C10N2230/06C10M145/14C10N2240/10C10N2230/68C10M2209/084C10N2020/04C10N2030/02C10N2030/06C10N2030/68C10N2040/04C10N2040/25
Inventor 松井茂树宫本大也松田裕充田川一生高木彰上野龙一
Owner JX NIPPON OIL & ENERGY CORP
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