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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, used in lubricating compositions, petroleum industry, etc., can solve problems such as sintering and oil leakage, and achieve the effect of ensuring fluidity and reducing friction loss

Inactive Publication Date: 2015-03-04
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

[0045] [First Embodiment: First Poly(meth)acrylate Viscosity Index Improver]

[0046] The poly(meth)acrylate-based viscosity index improver of the first embodiment has a polymer chain including a structural unit represented by the following general formula (1) and a structural unit represented by the following general formula (2). 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.

[0047]

[0048]

[0049] [In formula (1) and (2), R 1 represents hydrogen or methyl, R 2 represents a group represented by the following general formula (3), R 3 Represents an alkyl group having 1 to 18 carbon atoms that is linear or branched with 5 or less...

no. 2 approach

[0077] [Second Embodiment: Lubricating Oil Additive]

[0078] 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) unit and the polymer chain of the structural unit represented by the above general formula (2), the weight average molecular weight Mw of the poly(meth)acrylate viscosity index improver is 100,000 or more, and the ratio of the weight average molecular weight Mw to the number average molecular weight Mn Mw / Mn is 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.

[0079] 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 impro...

no. 3 approach

[0091] [Third Embodiment: Lubricating Oil Composition]

[0092] 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 structural unit shown and the polymer chain of the structural unit represented by the above general formula (2), the weight average molecular weight Mw of the poly(meth)acrylate viscosity index improver is more than 100,000, the weight average molecular weight Mw and the number average molecular weight The Mn ratio Mw / 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 a...

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Abstract

The present invention provides a poly(meth)acrylate viscosity index improver which has a polymer chain containing a structural unit represented by formula (1) and a structural unit represented by formula (2), and of which the Mw is at least 100,000 and Mw / Mn is at most 1.6. [R1 indicates hydrogen or a methyl group, R2 indicates a group represented by formula (3), and R3 indicates an alkyl group having 1-18 carbon atoms and a straight chain or a branch having at most 5 carbon atoms. m and n are integers that satisfy m>=5 and n>=4 and m+n<=31.

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 trend towards global environmental protection has been increasing, and the demand for improving the energy saving performance of lubricating oils has been 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C10M169/04C10N20/02C10N20/04C10N30/02C10N30/06C10N40/25
CPCC10N2210/02C10N2220/021C10M2215/04C10N2240/042C10M2219/024C10M2203/1025C10M2215/28C10N2240/10C10N2240/045C10M2209/084C10N2230/02C10N2240/04C10M2215/064C10N2230/06C10M145/14C10M2219/046C10N2230/68C10M2215/08C10M2219/106C10N2230/54C10M2207/289C10M2223/045C10N2020/04C10N2020/071C10N2020/02C10N2030/02C10N2030/54C10N2030/68C10N2040/045C10N2040/042C10N2040/04C10N2030/06C10N2040/25C10N2010/04
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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