阅读说明：本技术 油剂添加剂及油剂组合物 (Oil additive and oil composition ) 是由 龟上翔吾 堀宽 若狭崇志 高力骏介 于 2020-05-28 设计创作，主要内容包括：本发明提供易溶于油剂、且使摩擦系数降低的效果优异的油剂添加剂、以及含有上述油剂添加剂的油剂组合物。本发明的油剂添加剂含有至少1种由下述化学式(1)表示的化合物。(式中,R～(1)及R～(2)各自为碳数1以上且33以下的脂肪族烃基,R～(1)与R～(2)的合计碳数为2以上且34以下,X为单键或碳数1以上且5以下的脂肪族烃基,A为－O－CH-(2)－CH(OH)－CH-(2)OH或－O－CH(－CH-(2)－OH)-(2)。)(The invention provides an oil additive which is easily soluble in an oil agent and has an excellent effect of reducing a friction coefficient, and an oil agent composition containing the oil additive. The oil additive of the present invention contains at least 1 compound represented by the following chemical formula (1).(in the formula, R 1 And R 2 Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, R 1 And R 2 Has a total of 2 to 34 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and A is-O-CH 2 －CH(OH)－CH 2 OH or-O-CH (-CH) 2 －OH) 2 。))

1. An oil additive comprising at least 1 compound represented by the following chemical formula (1),

chemical formula (1):

in the formula, R¹And R²Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, R¹And R²Has a total of 2 to 34 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and A is-O-CH₂－CH(OH)－CH₂OH or-O-CH (-CH)₂－OH)₂。

2. The oil additive according to claim 1, wherein, in the compound represented by the chemical formula (1), X is a single bond.

3. An oil agent additive as claimed in claim 1 or 2, containing the compound of the formula (1) wherein A is-O-CH₂－CH(OH)－CH₂Compound 1 of OH, and in the formula (1) A is-O-CH (-CH)₂－OH)₂Compound 2 of (1).

4. The oil additive according to claim 3, wherein the content of the compound 1 is 1% by mass or more and 99% by mass or less with respect to the total of the compound 1 and the compound 2.

5. An oil additive according to any one of claims 1 to 4, wherein the melting point of the compound represented by the chemical formula (1) is 30 ℃ or lower.

6. An oil additive as defined in any one of claims 1 to 5, wherein R is¹And R²The total number of carbon atoms of (2) is 12 to 22 inclusive.

7. An oil additive as defined in any one of claims 1 to 6, wherein R is¹And R²Each being a straight or branched chain alkyl group.

8. An oil composition comprising the oil additive according to any one of claims 1 to 7 and an oil.

9. An oil composition according to claim 8, wherein the oil is a lubricating oil.

10. An oil composition according to claim 9, wherein the lubricating oil is an engine oil or a gear oil.

11. An oil composition according to claim 9 or 10, wherein the lubricating oil is a paraffin-based lubricating oil.

12. The oil composition according to any one of claims 8 to 11, wherein a content of the oil additive in the oil composition is 0.05% by mass or more and 20% by mass or less.

13. Use of an oil additive according to any one of claims 1 to 7 as a lubricating oil additive.

14. Use of an oil additive according to any one of claims 1 to 7 as a friction coefficient reducing agent.

15. Use of an oil additive as defined in any one of claims 1 to 7 for reducing the coefficient of friction of an engine or gear.

Technical Field

The present invention relates to an oil additive and an oil composition containing the oil additive and an oil.

Background

Ether alcohols obtained by the reaction of alkylene oxides with polyhydric alcohols are useful as raw materials for emulsifiers, surfactants, and the like.

For example, patent document 1 discloses an ether alcohol obtained by the reaction of an alkylene oxide having 8 to 20 carbon atoms with a monofunctional or polyfunctional alcohol having 1 to 10 carbon atoms and 1 to 4 alcoholic hydroxyl groups.

On the other hand, patent document 2 discloses a lubricating oil composition for an internal combustion engine, which contains a monoglyceride having a hydrocarbon group having 8 to 22 carbon atoms (a glycerin fatty acid ester in which a fatty acid forms an ester bond with 1 hydroxyl group out of 3 hydroxyl groups of glycerin).

The monoglyceride is added to a lubricating oil composition as a friction modifier.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 55-105632

Patent document 2: japanese patent laid-open publication No. 2014-25040

Disclosure of Invention

Problems to be solved by the invention

However, the monoglyceride described in patent document 2 is not easily dissolved in a lubricating oil, and when the amount added is large in order to reduce the friction coefficient, there is a problem that the monoglyceride precipitates in the lubricating oil composition.

The present invention has been made in view of the above circumstances, and provides an oil additive which is easily soluble in an oil agent and has an excellent effect of reducing a friction coefficient, and an oil composition containing the oil additive.

Means for solving the problems

The present inventors have conducted extensive studies and, as a result, have found that: the above problems can be solved by a compound having a specific structure.

That is, the present invention relates to an oil additive containing at least 1 kind of compound represented by the following chemical formula (1).

[ solution 1]

Chemical formula (1):

(in the formula, R¹And R²Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, R¹And R²Has a total of 2 to 34 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and A is-O-CH₂－CH(OH)－CH₂OH or-O-CH (-CH)₂－OH)₂。)

Effects of the invention

In a monoglyceride conventionally used as a lubricating oil additive, a hydroxyl group of the monoglyceride is adsorbed to a metal, and a straight-chain alkyl group of the monoglyceride is directed to the lubricating oil side, thereby forming an oil film and reducing friction. In order to form a firmer oil film and enhance the effect of reducing the friction coefficient, it is necessary to make the linear alkyl group of the monoglyceride long. However, it is considered that the longer the linear alkyl group of the monoglyceride, the higher the melting point of the monoglyceride becomes, and thus the solubility in the lubricating oil decreases.

On the other hand, the compound represented by the chemical formula (1) of the present invention is considered to have a characteristic structure having a glyceryl ether group and a hydroxyl group in the interior of a carbon chain, and therefore, has a low melting point, excellent solubility in an oil agent, and an excellent effect of reducing the friction coefficient.

Detailed Description

The present invention will be described in detail below.

< oil agent additive >

The oil additive of the present invention contains at least 1 kind of compound represented by the following chemical formula (1) (hereinafter, also referred to as ether alcohol). The oil additive of the present invention may be composed of a compound represented by the following chemical formula (1). The oil additive of the present invention may be composed of 1 or more compounds represented by the following chemical formula (1).

[ solution 2]

Chemical formula (1):

(in the formula, R¹And R²Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, R¹And R²Has a total of 2 to 34 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and A is-O-CH₂－CH(OH)－CH₂OH or-O-CH (-CH)₂－OH)₂。)

R¹And R²Each of the aliphatic hydrocarbon groups having 1 to 33 carbon atoms is preferably a linear or branched alkyl group (also referred to as branched chain alkyl group), and more preferably a linear alkyl group, from the viewpoint of reducing the friction coefficient. The aliphatic hydrocarbon group may have a substituent such as a hydroxyl group, a ketone group, a carboxyl group, an aryl group, and an alkoxy group, as long as the effect of the present invention is not impaired. R¹And R²The aliphatic hydrocarbon groups may be the same or different. In addition, with respect to R¹And R²The number of the substituents (C) is, from the viewpoint of solubility in an oil, each R¹And R²The total of (a) and (b) is preferably 5 or less, more preferably 3 or less, still more preferably 1 or less, and still more preferably 0 (i.e., has no substituent).

R¹And R²Is preferably 12 or more, more preferably 14 or more, and further preferably 16 or more from the viewpoint of reducing the friction coefficient, and is dissolved in the oil agentFrom the viewpoint of solubility, it is preferably 22 or less, more preferably 20 or less, still more preferably 18 or less, and still more preferably 16 or less.

X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and from the viewpoint of production efficiency and production easiness, is preferably a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms, more preferably a single bond or an aliphatic hydrocarbon group having 1 to 2 carbon atoms, still more preferably a single bond or an aliphatic hydrocarbon group having 1 carbon atom, and yet still more preferably a single bond.

R¹、R²And X has a total carbon number of 2 or more and 39 or less, preferably 12 or more, more preferably 14 or more, and further preferably 16 or more from the viewpoint of reducing the friction coefficient, and preferably 24 or less, more preferably 22 or less, further preferably 20 or less, further preferably 18 or less, and further preferably 16 or less from the viewpoint of solubility in an oil agent.

When X is the above aliphatic hydrocarbon group, a linear or branched alkyl group is preferable, and a linear alkyl group is more preferable, from the viewpoint of production efficiency and production easiness.

From the viewpoint of production efficiency and ease of production, X is preferably X

*－(CH₂)_nN (n is 0 or more and 5 or less, and represents a bonding site.) is preferably 0 or more, preferably 3 or less, more preferably 2 or less, still more preferably 1 or less, and still more preferably 0, i.e., a single bond.

From the viewpoint of production efficiency and ease of production, the oil additive preferably contains R¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive preferably contains R¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive is excellentOptionally X is a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms, R¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive preferably contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive more preferably contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 2 carbon atoms¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive more preferably contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 2 carbon atoms¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive preferably further contains R and X is a single bond or an aliphatic hydrocarbon group having 1 carbon atom¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, the oil additive preferably further contains R and X is a single bond or an aliphatic hydrocarbon group having 1 carbon atom¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

From the viewpoint of production efficiency and ease of production, it is more preferable that the oil additive further contains X is a single bond and R¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

The oil additive contains X is a single bond and R¹And R²In the case of 2 or more compounds having different total carbon numbers in (A), R is a group represented by formula (I) from the viewpoint of solubility in an oil agent¹And R²A compound having 14 carbon atoms in total and R¹And R²The total content of the compounds having 16 carbon atoms in total of (3) is preferably 75% by mass or more, more preferably 85% by mass or more, still more preferably 95% by mass or more, and still more preferably 100% by mass.

The oil additive contains R in the compound represented by the chemical formula (1)¹And R²Has the same total carbon number and R¹And R²In the case of 2 or more compounds each having a different carbon number, R is a group having a lower solubility in the oil agent¹Has 5 or more carbon atoms and R²The content ratio of the compound having 5 or more carbon atoms of (b) is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, preferably 90% by mass or less, more preferably 80% by mass or less, further preferably 70% by mass or less.

From the viewpoint of solubility in an oil agent, the melting point of the ether alcohol is preferably 30 ℃ or lower, more preferably 20 ℃ or lower, further preferably 10 ℃ or lower, and may be-200 ℃ or higher.

The method for producing the ether alcohol is not particularly limited, and can be produced, for example, by the following method: the double bond of the internal olefin is oxidized by a peroxide such as hydrogen peroxide, performic acid, peracetic acid, or the like to synthesize an internal epoxide, and glycerin is reacted with the obtained internal epoxide. In the case of a mixture in which the total number of carbon atoms of the internal olefin is constant and which has double bonds at different positions, the compound represented by the above chemical formula (1) obtained by the above production method is a compound in which X is a single bond and R is¹And R²Has the same total carbon number and R¹And R²A mixture of a plurality of compounds each having a different carbon number. The compound represented by the above chemical formula (1) obtained by the above production method is usually such that A is-O-CH₂－CH(OH)－CH₂The OH compounds 1 (hereinafter, also referred to as ether alcohol 1) and A are-O-CH (-CH)₂－OH)₂Compound 2 (hereinafter, also referred to as ether alcohol 2).

The internal olefin used in the production of the ether alcohol may contain a terminal olefin. In this case, the content of the terminal olefin contained in the olefin is, for example, 0.1% by mass or more and 0.2% by mass or more, and 5% by mass or less, 3% by mass or less, 2% by mass or less, 1% by mass or less and 0.5% by mass or less.

In the case where the oil additive contains the ether alcohol 1 and the ether alcohol 2, the content of the ether alcohol 1 is preferably 1% by mass or more, more preferably 30% by mass or more, further preferably 40% by mass or more, further preferably 50% by mass or more, preferably 99% by mass or less, more preferably 90% by mass or less, and further preferably 80% by mass or less with respect to the total amount of the ether alcohol 1 and the ether alcohol 2, from the viewpoint of reducing the friction coefficient. From the same viewpoint, the amount is preferably 1 to 99% by mass, more preferably 30 to 99% by mass, even more preferably 40 to 90% by mass, and even more preferably 50 to 80% by mass.

The oil additive may be obtained as a mixture of 1 kind of compound represented by the above chemical formula (1), or 2 or more kinds of compounds represented by the above chemical formula (1), or a mixture of these with a minor component other than the olefin contained in the raw material olefin and a derivative thereof.

The oil additive can be suitably used as a lubricating oil additive or a friction coefficient reducing agent.

In addition, the oil additive can be suitably used for reducing the friction coefficient of an engine or a gear.

< oil composition >

The oil composition of the present invention contains at least an oil agent and the oil agent additive.

From the viewpoint of ease of handling, the melting point of the oil agent is preferably-200 ℃ or higher, preferably-15 ℃ or lower, more preferably-30 ℃ or lower, still more preferably-45 ℃ or lower, and still more preferably-60 ℃ or lower. The melting point of the oil agent can be measured by using a High sensitivity type differential scanning calorimeter (product name: DSC7000X, manufactured by Hitachi High-Tech Science Corporation).

The oil agent can be used without particular limitation, and is preferably a lubricating oil from the viewpoint of lubricity, and examples of the lubricating oil include engine oil, gear oil, and the like. The oil agent is preferably a paraffin-based lubricating oil.

The content of the oil additive in the oil composition is not particularly limited, but is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, further preferably 0.2% by mass or more, further preferably 0.5% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less, from the viewpoint of reducing the friction coefficient.

The oil composition may contain various additives as required. Examples of the additives include: antioxidants, metal deactivators, anti-wear agents, antifoaming agents, viscosity index improvers, pour point depressants, detergent dispersants, rust inhibitors, and known oil additives.

The present invention and preferred embodiments thereof are described below.

＜1＞

An oil additive containing at least 1 compound represented by the following chemical formula (1).

[ solution 3]

Chemical formula (1):

(in the formula, R¹And R²Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, R¹And R²Has a total of 2 to 34 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and A is-O-CH₂－CH(OH)－CH₂OH or-O-CH (-CH)₂－OH)₂。)

＜2＞

An oil additive containing at least 1 compound represented by the following chemical formula (1).

[ solution 4]

Chemical formula (1):

(in the formula, R¹And R²Each is an aliphatic hydrocarbon group having 1 to 33 carbon atoms, X is a single bond or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, R¹、R²And X has 2 to 39 carbon atoms in total, and A is-O-CH₂－CH(OH)－CH₂OH or-O-CH (-CH)₂－OH)₂。)

＜3＞

The oil additive according to < 1 > or < 2 >, wherein R¹And R²Each being a straight or branched chain alkyl group.

＜4＞

The oil additive according to < 1 > or < 2 >, wherein R¹And R²Each is a straight chain alkyl group.

＜5＞

The oil additive according to any one of < 1 > - < 4 >, wherein R¹And R²The total number of carbon atoms of (a) is preferably 12 or more, more preferably 14 or more, further preferably 16 or more, preferably 22 or less, more preferably 20 or less, further preferably 18 or less, and further preferably 16 or less.

＜6＞

The oil additive according to any one of < 1 > - < 4 >, wherein R¹And R²The total number of carbon atoms of (a) is preferably 12 to 22, more preferably 14 to 22, and still more preferably 16 to 22.

＜7＞

The oil additive according to any one of < 1 > - < 4 >, wherein R¹And R²The total number of carbon atoms of (a) is preferably 12 to 20, more preferably 14 to 20, and still more preferably 16 to 20.

＜8＞

The oil additive according to any one of < 1 > - < 4 >, wherein R¹And R²The total number of carbon atoms of (a) is preferably 12 or more and 18 or less, more preferably 14 or more and 18 or less, and still more preferably 16 or more and 18 or less.

＜9＞

The oil additive according to any one of < 1 > - < 4 >, wherein R¹And R²The total number of carbon atoms of (a) is preferably 12 to 16, more preferably 14 to 16, and still more preferably 16.

＜10＞

The oil additive according to any one of < 1 > - < 9 >, wherein, in the compound represented by the chemical formula (1), X is a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms.

＜11＞

The oil additive according to any one of < 1 > - < 9 >, wherein, in the compound represented by the chemical formula (1), X is a single bond or an aliphatic hydrocarbon group having 1 or more and 2 or less carbon atoms.

＜12＞

The oil additive according to any one of < 1 > - < 9 >, wherein, in the compound represented by the above chemical formula (1), X is a single bond or an aliphatic hydrocarbon group having 1 carbon atom.

＜13＞

The oil additive according to any one of < 1 > -to < 9 >, wherein, in the compound represented by the above chemical formula (1), X is a single bond.

＜14＞

The oil additive according to any one of < 1 > < 9 >, wherein, in the compound represented by the above chemical formula (1), X is preferably a linear or branched alkyl group, more preferably a linear alkyl group.

＜15＞

The oil additive according to any one of < 1 > < 9 >, wherein, in the compound represented by the above chemical formula (1), X is

*－(CH₂)_nN (n is 0 or more and 5 or less, and represents a bonding site.) is preferably 0 or more, preferably 3 or less, more preferably 2 or less, still more preferably 1 or less, and still more preferably 0, i.e., a single bond.

＜16＞

The oil additive according to any one of < 1 > - < 15 >, wherein R¹、R²And X has a total carbon number of 2 to 39, preferably 12 or more, more preferably 14 or more, further preferably 16 or more, preferably 24 or less, more preferably 22 or less, further preferably 20 or less, further preferably 18 or less, further preferably 16 or less.

＜17＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜18＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 3 carbon atoms¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜19＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains R and X is a single bond or an aliphatic hydrocarbon group having 1 to 2 carbon atoms¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜20＞

The oil additive according to any one of < 1 > - < 9 >, whereinThe oil additive comprises X is a single bond or an aliphatic hydrocarbon group having 1 to 2 carbon atoms, and R¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜21＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains R and X is a single bond or an aliphatic hydrocarbon group having 1 carbon atom¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜22＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains R and X is a single bond or an aliphatic hydrocarbon group having 1 carbon atom¹、R²And X has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜23＞

The oil additive according to any one of < 1 > - < 9 >, wherein the oil additive contains X is a single bond and R¹And R²Has the same total carbon number and R¹And R²2 or more compounds each having a different carbon number.

＜24＞

The oil additive according to any one of < 1 > to < 4 >, wherein the oil additive contains X is a single bond and R¹And R²R is 2 or more compounds having different total carbon number¹And R²A compound having 14 carbon atoms in total and R¹And R²The total content of the compounds having 16 carbon atoms in total of (3) is preferably 75% by mass or more, more preferably 85% by mass or more, still more preferably 95% by mass or more, and still more preferably 100% by mass.

＜25＞

The oil additive according to any one of < 1 > - < 23 >, wherein the oil additive contains R¹And R²Has the same total carbon number, andR¹and R²Each of 2 or more compounds having different carbon number, R¹Has 5 or more carbon atoms and R²The content ratio of the compound having 5 or more carbon atoms of (b) is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, preferably 90% by mass or less, more preferably 80% by mass or less, further preferably 70% by mass or less.

＜26＞

The oil additive according to any one of < 1 > - < 23 >, wherein the oil additive contains R¹And R²Has the same total carbon number and R¹And R²Each of 2 or more compounds having different carbon number, R¹Has 5 or more carbon atoms and R²The content ratio of the compound having 5 or more carbon atoms of (b) is 10 to 90 mass%.

＜27＞

The oil additive according to any one of < 1 > - < 23 >, wherein the oil additive contains R¹And R²Has the same total carbon number and R¹And R²Each of 2 or more compounds having different carbon number, R¹Has 5 or more carbon atoms and R²The content ratio of the compound having 5 or more carbon atoms of (b) is 20 to 80% by mass.

＜28＞

The oil additive according to any one of < 1 > - < 23 >, wherein the oil additive contains R¹And R²Has the same total carbon number and R¹And R²Each of 2 or more compounds having different carbon number, R¹Has 5 or more carbon atoms and R²The content ratio of the compound having 5 or more carbon atoms of (b) is 30 to 70 mass%.

＜29＞

The oil additive according to any one of < 1 > - < 28 >, wherein the melting point of the compound represented by the above chemical formula (1) is 30 ℃ or lower.

＜30＞

The oil additive according to any one of < 1 > - < 28 >, wherein the melting point of the compound represented by the above chemical formula (1) is 20 ℃ or lower.

＜31＞

The oil additive according to any one of < 1 > - < 28 >, wherein the melting point of the compound represented by the above chemical formula (1) is 10 ℃ or lower.

＜32＞

The oil additive according to any one of < 1 > - < 31 >, wherein the internal olefin used in the production of the compound represented by the chemical formula (1) contains a terminal olefin, and the content of the terminal olefin contained in the olefin is 0.1 mass% or more, or 0.2 mass% or more, or 5 mass% or less, 3 mass% or less, 2 mass% or less, 1 mass% or less, or 0.5 mass% or less.

＜33＞

The oil additive according to any one of < 1 > < 32 > wherein A is-O-CH in the chemical formula (1)₂－CH(OH)－CH₂Compound 1 (ether alcohol 1) of OH, and in the above chemical formula (1), A is-O-CH (-CH)₂－OH)₂Compound 2 (ether alcohol 2) of (1).

＜34＞

The oil additive according to < 33 >, wherein the content of the ether alcohol 1 is preferably 1% by mass or more, more preferably 30% by mass or more, further preferably 40% by mass or more, further preferably 50% by mass or more, preferably 99% by mass or less, more preferably 90% by mass or less, further preferably 80% by mass or less, based on the total amount of the ether alcohol 1 and the ether alcohol 2.

＜35＞

The oil additive according to < 33 >, wherein the ether alcohol 1 is contained in an amount of 1 to 99% by mass based on the total amount of the ether alcohol 1 and the ether alcohol 2.

＜36＞

The oil additive according to < 33 >, wherein the ether alcohol 1 is contained in an amount of 30 to 99% by mass based on the total amount of the ether alcohol 1 and the ether alcohol 2.

＜37＞

The oil additive according to < 33 >, wherein the content of the ether alcohol 1 is 40 to 90% by mass based on the total amount of the ether alcohol 1 and the ether alcohol 2.

＜38＞

The oil additive according to < 33 >, wherein the ether alcohol 1 is contained in an amount of 50 to 80% by mass based on the total amount of the ether alcohol 1 and the ether alcohol 2.

＜39＞

Use of the oil additive described in any one of < 1 > -to < 38 > as a lubricant additive.

＜40＞

Use of the oil additive described in any one of < 1 > -to < 38 > as a friction coefficient reducing agent.

＜41＞

Use of the oil additive described in any one of < 1 > -to < 38 > for reducing the friction coefficient of an engine or a gear.

＜42＞

An oil composition comprising the oil additive and the oil agent as defined in any one of < 1 > -to < 38 >.

＜43＞

The oil composition of < 42 > wherein the melting point of the oil is preferably-200 ℃ or higher, preferably-15 ℃ or lower, more preferably-30 ℃ or lower, still more preferably-45 ℃ or lower, and still more preferably-60 ℃ or lower.

＜44＞

The oil composition according to < 42 > or < 43 > wherein the oil is a lubricating oil.

＜45＞

The oil composition according to < 44 >, wherein the lubricating oil is an engine oil or a gear oil.

＜46＞

The oil composition according to < 44 > or < 45 >, wherein the lubricating oil is a paraffin-based lubricating oil.

＜47＞

The oil composition according to any one of < 42 > - < 46 >, wherein a content of the oil additive in the oil composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, further preferably 0.2% by mass or more, further preferably 0.5% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, further preferably 5% by mass or less.

＜48＞

The oil composition according to any one of < 42 > -46 >, wherein a content of the oil additive in the oil composition is 0.05% by mass or more and 20% by mass or less.

＜49＞

The oil composition according to any one of < 42 > -46 >, wherein a content of the oil additive in the oil composition is 0.1 mass% or more and 10 mass% or less.

＜50＞

The oil composition according to any one of < 42 > -46 >, wherein a content of the oil additive in the oil composition is 0.2 mass% or more and 5 mass% or less.

＜51＞

The oil composition according to any one of < 42 > -46 >, wherein a content of the oil additive in the oil composition is 0.5 mass% or more and 5 mass% or less.

Examples

The present invention will be specifically described below based on examples. In the table, the content of each component represents mass% unless otherwise specified. The various measurement methods are as follows.

< method for measuring double bond distribution of olefin >

The double bond distribution of the olefin was measured by gas chromatography (hereinafter abbreviated as GC). Specifically, after a disulfide derivative is produced by reacting dimethyldisulfide with an olefin, the components are separated by GC. The double bond distribution of the olefin was determined from each peak area. The apparatus and analysis conditions used for the measurement are as follows.

A GC device: trade name HP6890 (manufactured by HEWLETT PACKARD Co.)

Column: trade name of Ultra-Alloy-1HT capillary column 30 m.times.250. mu.m.times.0.15. mu.m (manufactured by Frontier Laboratories K.K.)

A detector: hydrogen Flame Ion Detector (FID)

Injection temperature: 300 deg.C

Detector temperature: 350 deg.C

Oven: 60 ℃ (0 min) → 2 ℃/min → 225 → 20 ℃/min → 350 ℃ → 350 ℃ (5.2 min)

< method for measuring content ratio of structural isomers >

Mixing 0.05g of alkyl glyceryl ether, 0.2g of trifluoroacetic anhydride and 1g of deuterated chloroform, and passing through¹H-NMR was measured. The measurement conditions are as follows.

Nuclear magnetic resonance apparatus: agilent 400-MR DD2 manufactured by Agilent Kabushiki Kaisha

The observation range is as follows: 6410.3Hz

Data points: 65536

Measurement mode: preset (Presat)

Pulse width: 45 degree

Pulse delay time: 10 seconds

Cumulative number of times: 128 times

< production of internal olefin >

Production example A1

(production of C16 internal olefin (internal olefin 1))

A flask equipped with a stirrer was charged with 7000g (28.9 mol) of 1-hexadecanol (product name: KALCOL6098, available from Kao corporation) and 700g (10 wt% based on the starting alcohol) of gamma-alumina (STREMChemicals, Inc.) as a solid acid catalyst, and nitrogen (7000 mL/min) was allowed to flow through the system at 280 ℃ with stirring to carry out a reaction for 32 hours. The conversion of alcohol after the reaction was completed was 100%, and the purity of C16 olefin was 99.6%. Transferring the obtained crude C16 internal olefin to a distiller, and distilling at 136-160 ℃/4.0mmHg to obtain the internal olefin 1 with the olefin purity of 100%. The double bond distribution of the internal olefin 1 obtained is: 0.2% at position C1; 15.8% at position C2; position C3 is 14.5%; 15.7% at position C4; position C5 is 17.3%; 16.5% at position C6; the total of the C7 th and 8 th positions was 20.0%.

Production example A2

(production of C18 internal olefin (internal olefin 2))

800kg (3.0 kmol) of 1-octadecanol (product name: KALCOL8098, manufactured by Kao corporation) and 80kg (10 wt% with respect to the raw material alcohol) of activated alumina GP-20 (manufactured by Kazuku Kogyo Co., Ltd.) as a solid acid catalyst were charged into a reactor equipped with a stirrer, and nitrogen (15L/min) was allowed to flow through the system at 280 ℃ with stirring to carry out a reaction for 16 hours. The conversion of alcohol after the reaction was completed was 100%, and the purity of C18 olefin was 98.7%. Transferring the obtained crude C18 internal olefin to a distiller, and distilling at 163-190 ℃/4.6mmHg to obtain the internal olefin 2 with the olefin purity of 100%. The double bond distribution of the internal olefins 2 obtained is: 0.3% at position C1; position C2 is 13.3%; position C3 is 12.6%; position C4 is 13.9%; position C5 is 14.8%; position C6 is 13.7%; position C7 is 12.6; the total of the C8 th and 9 th positions was 18.8%.

< production of internal epoxide >

Production example B1

(production of C16 inner epoxide (inner epoxide 1))

A flask equipped with a stirrer was charged with the internal olefin 1(800g, 3.56 mol) obtained in production example A1, acetic acid (Wako pure chemical industries, Ltd.) 107g (1.78 mol), sulfuric acid (Wako pure chemical industries, Ltd.) 15.6g (0.15 mol), 35% hydrogen peroxide (Wako pure chemical industries, Ltd.) 415.7g (4.28 mol), and sodium sulfate (Wako pure chemical industries, Ltd.) 25.3g (0.18 mol), and reacted at 50 ℃ for 4 hours. Thereafter, the temperature was raised to 70 ℃ and the reaction was further carried out for 2 hours. After the reaction, the reaction mixture was layered and the water layer was discharged, and the oil layer was washed with ion-exchanged water, a saturated aqueous sodium carbonate solution (manufactured by Wako pure chemical industries, Ltd.), a saturated aqueous sodium sulfite solution (manufactured by Wako pure chemical industries, Ltd.), and a 1% saline solution (manufactured by Wako pure chemical industries, Ltd.), and concentrated by an evaporator to obtain 820g of an internal epoxide 1.

Production example B2

(production of C18 inner epoxide (inner epoxide 2))

A flask equipped with a stirrer was charged with 2(595g, 2.38 mol) of the internal olefin obtained in production example A2, 71.7g (1.20 mol) of acetic acid (Wako pure chemical industries, Ltd.), 9.8g (0.10 mol) of sulfuric acid (Wako pure chemical industries, Ltd.), and 324g (4.00 mol) of 35% hydrogen peroxide (Wako pure chemical industries, Ltd.), and reacted at 50 ℃ for 4 hours. Thereafter, the temperature was raised to 80 ℃ and the reaction was further carried out for 5 hours. After the reaction, the layers were separated and the aqueous layer was discharged, and the oil layer was washed with ion-exchanged water, a saturated aqueous sodium carbonate solution (Wako pure chemical industries, Ltd.), a saturated aqueous sodium sulfite solution (Wako pure chemical industries, Ltd.), and ion-exchanged water, and concentrated by an evaporator to obtain 629g of inner epoxide 2.

< production of reaction product of epoxide with Glycerol (alkyl Glycerol Ether, AGE) >

Hereinafter, the alkyl glyceryl ether is referred to as AGE. AGE1, AGE2, and the like represent alkyl glyceryl ether 1, alkyl glyceryl ether 2, and the like, respectively.

Production example C1

(production of reaction product of internal epoxide 1 with Glycerol (AGE 1))

A flask equipped with a stirrer was charged with 2298g (25.0 mol) of glycerol (manufactured by Wako pure chemical industries, Ltd.) and 0.122g (1.25 mmol) of 98% sulfuric acid (manufactured by Wako pure chemical industries, Ltd.), and the temperature was raised to 130 ℃. Thereafter, the internal epoxide 1(300g, 1.25 mol) obtained in production example B1 was added dropwise over 1 hour, followed by reaction at 130 ℃ for 8 hours. Hexane was added to the liquid obtained by the reaction, washed with ion-exchanged water, and then concentrated under reduced pressure by an evaporator to obtain 400g of AGE 1. The obtained AGE1 is contained in R in the above chemical formula (1)¹And R²Each of which contains an alkyl group having 1 to 13 carbon atoms and R¹And R²The total number of carbon atoms of 14 and X is a single bond, 73% of ether alcohol 1 and 27% of ether alcohol 2, wherein A in the ether alcohol 1 (AGE obtained by reacting hydroxyl group at 1-position of glycerin with epoxy group) is-O-CH₂－CH(OH)－CH₂OH, A of the ether alcohol 2 (AGE obtained by reacting hydroxyl group at 2-position of glycerol with epoxy group) is-O-CH (-CH)₂－OH)₂。

Production example C2

(production of reaction product of inner epoxide 2 and Glycerol (AGE 2))

AGE2 was obtained by a production method similar to production example C1, except that the inner epoxide 2(1.25 mol) obtained in production example B2 was used instead of the inner epoxide 1(1.25 mol) obtained in production example B1. The obtained AGE2 is contained in R in the above chemical formula (1)¹And R²Each of which contains an alkyl group having 1 to 15 carbon atoms and R¹And R²Wherein A in the ether alcohol 1 (AGE obtained by reacting the hydroxyl group at the 1-position of glycerin with the epoxy group) is-O-CH₂－CH(OH)－CH₂OH, A of the ether alcohol 2 (AGE obtained by reacting hydroxyl group at 2-position of glycerol with epoxy group) is-O-CH (-CH)₂－OH)₂。

Examples 1 to 8 and comparative examples 1 to 6

The oil additives shown in table 1 were added to the oil agents shown in table 1 in the amounts shown in table 1, and the mixture was thoroughly mixed at 80 ℃. The oils and oil additives shown in table 1 are as follows.

< oil agent >

COSMO NEUTRAL 150: paraffinic lubricating OIL manufactured by COSMO OIL LUBRICANTS co., Ltd

Toyota Pure ATF WS: paraffin-based lubricating oil manufactured by Toyota automotive Co., Ltd

< oil agent additive >

Additive 1: AGE1 produced in production example C1

Additive 2: AGE2 produced in production example C2

EXCEL O-95R: pure plant molecular distilled monoglyceride (manufactured by Kao corporation)

< measurement of melting Point of oil additive >

Each oil additive was placed in a 70. mu.L pan using a High-sensitivity type differential scanning calorimeter (manufactured by Hitachi High-Tech Science Corporation, trade name: DSC7000X), and the temperature was raised from-60 ℃ to 80 ℃ at 2 ℃/min, and the temperature at the maximum peak of the temperature difference detected by the differential thermode with respect to the temperature rise time was taken as the melting point.

Using the oil compositions prepared in examples and comparative examples, the following measurements and evaluations were performed.

< determination of Friction coefficient >

The friction coefficient of each oil composition prepared was measured under the measurement conditions shown below using an MTM2 traction measuring instrument (PCS Instruments ltd). The results are shown in Table 1. The smaller the friction coefficient, the better the fuel economy.

Measurement conditions

Load loading: 50N

Oil temperature: 80 ℃ or 120 DEG C

Sliding/rolling ratio: 50 percent of

Average rotating speed: 10mm²Second/second

< preservation test >

Each of the prepared oil compositions was stored at 5 ℃, and the appearance was visually observed after 1 day and after 20 days, and evaluated according to the following criteria. The results are shown in Table 1.

Good: the oil composition was transparent.

X: the compound precipitates in the oil composition.

[ Table 1]

As is clear from Table 1, the oil compositions of examples 1 to 8 had low abrasion loss coefficients at 80 ℃ and 120 ℃ and high quality, and the oil additives did not precipitate even when stored at low temperatures for a long period of time. On the other hand, the oil solutions of comparative examples 1 and 2 had high wear factors at 80 ℃ and 120 ℃ because no oil solution additive was added. The oil compositions of comparative examples 3 to 6 had low wear factors at 80 ℃ and 120 ℃, but the oil additive precipitated during storage at low temperatures, and thus they were to be improved.

Industrial applicability

The oil additive of the present invention is useful as a friction reducing agent to be added to various oil compositions.