JPH0673388A - Lubricant - Google Patents

Abstract

PURPOSE:To provide a lubricant which reduces friction to facilitate machine work and is esp. suitable for machining a metal such as Al, an Al alloy, brass, or an Mg alloy by selecting a specific aliph. compd. having a double bond at the alpha-position and a hydroxyl group at the gamma-position. CONSTITUTION:A lubricant contg. a compd. of formula I (wherein R is a 3-30C hydrocarbon group, pref. a linear or branched alkyl, alkenyl, aryl, or alkaryl group) (e.g. 1-octen-3-ol) reduces the coefficient of friction of a lubricated part. improves the seizure load, and is esp. suitable for metal machining such as cutting, roller drawing or punching. Though the compd. alone can be used as the lubricant, the concn. of the compd. of 0.5-99.5wt.% is suitable. The lubricar may further contain a base oil having a kinematic viscosity at 40 deg.C of 0.5-50C cSt, such as a mineral oil (e.g. a paraffinic oil) or a synthetic oil (e.g. a low-mol. -wt. polybutene), water, or their mixture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel lubricant, and more specifically to a lubricant capable of reducing the friction coefficient of the lubricated portion of various machines and improving the seizure load, and particularly to cutting, rolling drawing and punching. Lubricants effective for various metal processing such as.

[0002]

2. Description of the Related Art Conventionally, various lubricants have been used in order to reduce friction in lubricated parts of various mechanical devices, and in metal working, to reduce friction and facilitate working. . Aliphatic olefins are known as one of such lubricant components. For example, a lubricant additive containing an aliphatic olefin (JP-A-59-15490) and a technique of using an aliphatic olefin as a lubricant for metal working (JP-A-2-133495) are disclosed. These aliphatic olefins have a large friction reducing effect and exhibit excellent effects in metal processing and the like, but it is earnestly desired in the industrial world to achieve a further remarkable reduction in friction. On the other hand, a linear compound having an unsaturated bond and a hydroxyl group in one molecule, such as oleyl alcohol (9-octadecen-1-ol), is widely used as a lubricant, but its effect is not always sufficient. I'm not satisfied.

[0003]

Under the circumstances, the present invention reduces the friction coefficient of the lubricated portion and improves the seizure load, and is particularly effective for various metal workings such as cutting, rolling drawing and punching. The purpose of the present invention is to provide a new lubricant.

[0004]

Means for Solving the Problems As a result of intensive studies to develop a lubricant having the above-mentioned preferable properties, the present inventors have found that it has a double bond at the α-position and a hydroxyl group at the γ-position. The aliphatic compound having a specific structure has a reduced friction, shows lubrication characteristics similar to that of an aliphatic olefin with respect to various metals, particularly aluminum, and has a lower friction coefficient and a higher load bearing performance than the aliphatic olefin. I found that. The present invention has been made based on such findings. That is, the present invention has the general formula

[0005]

[Chemical 2]

[In the formula, R is a hydrocarbon group having 3 to 30 carbon atoms, preferably a (straight or branched) alkyl group, an alkenyl group, an allyl group or an alkyl-substituted allyl group, particularly preferably an alkyl group. . ] It provides a lubricant characterized by containing a compound represented by the following.

The aliphatic compound used in the lubricant of the present invention has a double bond at the α-position represented by the general formula (I) and a hydroxyl group at the γ-position and has 6 to 33 carbon atoms. It is a compound. Those with less than 6 carbon atoms are not suitable because they have a low flash point, and those with more than 33 are difficult to use because they become solid, and also difficult to mix or dissolve with base oil or other additives. Becomes inappropriate. Further, the positions of the double bond and the hydroxyl group have no effect other than the above structure, or are significantly inferior even if there is an effect.

Among the compounds represented by the general formula (I), those having 8 to 20 carbon atoms are particularly preferable. Examples of such a compound include 1-octen-3-ol, 1
-Decen-3-ol, 1-dodecen-3-ol, 1
-Tetradecen-3-ol, 1-hexadecene-3-
All, 1-octadecen-3-ol, etc. are mentioned. These may be used alone or in combination of two or more.

The lubricant of the present invention may contain only the compound represented by the general formula (I), but the amount of the compound is 0.5% by weight or more based on the total amount of the lubricant. Those containing 0.5 to 99.5% by weight are preferable. If this content is less than 0.5% by weight, the effects of the present invention will not be sufficiently exhibited.

The lubricant of the present invention may contain other base oil such as mineral oil or synthetic oil, water, or a mixture thereof. As the other base oil, mineral oil or synthetic oil having a kinematic viscosity at a temperature of 40 ° C. of 0.5 to 500 cSt, especially 1 to 50 cSt is used. The mineral oil is not particularly limited, and can be obtained by atmospheric distillation of various types, for example, paraffin-based crude oil, intermediate-based crude oil, naphthene-based crude oil, or the residual oil of atmospheric distillation is distilled under reduced pressure. The distillate oil or a refined oil obtained by purifying the distillate oil according to a conventional method, specifically, a solvent refined oil, a hydrogenated refined oil, a dewaxed treated oil, a clay treated oil and the like can be mentioned. Lubricants blended with these mineral oils
Oxidation stability is improved.

On the other hand, synthetic oils include, for example, low molecular weight polybutene, low molecular weight polypropylene, and further having 8 to 8 carbon atoms.
Examples include α-olefin oligomers of 14 and hydrogenated compounds thereof, alkylbenzenes, diesters such as phthalates, polyol esters, and the like. Among them, low molecular weight polybutene, low molecular weight polypropylene, α-C8-14 Olefin oligomers and hydrogenated compounds thereof are preferred. When applied to metalworking oils, the lubricant containing these synthetic oils produces less odor during use, improves the working environment, and further improves the degreasing property of the surface of processed products.

These other base oils may be used alone or in combination of two or more, and the compounding amount thereof is usually in the range of 0 to 99.5% by weight based on the total amount of the lubricant. To be elected. Further, when water is used instead of these other base oils, it becomes an emulsion type lubricant in which the compound represented by the general formula (I) is dispersed in water, or an emulsion type lubricant in which water is dispersed in the compound. This can also be used in the present invention. Furthermore, various kinds of alcohols, fatty acids, esters, diesters, polyhydric esters, fats and oils, sulfurized fats and oils, sulfurized esters, sulfurized olefins, and chlorinated paraffins can be added to the lubricant of the present invention as desired. , Phosphoric acid ester, phosphoric acid ester amine salt, phosphorous acid ester, phosphorous acid ester amine salt, dithiophosphoric acid salt (zinc dithiophosphoric acid, molybdenum dithiophosphoric acid, etc.), dithiocarbamic acid salt (molybdenic acid dithiocarbamate, etc.),
Known oiliness agents such as chlorinated oils and fats and extreme pressure agents can be added. The compounding amount of these oiliness agents and extreme pressure agents is usually used in the range of 0 to 30% by weight based on the total amount of the lubricant. If desired, emulsifiers, rust inhibitors, corrosion inhibitors,
Known additives such as antioxidants and defoaming agents can also be added. The blending amount of these additives is usually selected in the range of 0 to 20% by weight based on the total amount of the lubricant.

The lubricant of the present invention is preferably used for various metal workings such as cutting, rolling, drawing and punching. Particularly, it is suitable for processing aluminum or aluminum alloy. That is, the compound represented by the general formula (I) exhibits lubricating properties similar to conventionally used aliphatic olefins, especially to aluminum, and has a lower friction coefficient and a higher load resistance than the aliphatic olefins. Show performance.

[0014]

EXAMPLES Next, the present invention will be described in more detail by way of examples. Example 1 1-octen-3-ol was used as a test oil, and a Falex tester was used under the test conditions shown below to determine the minimum friction coefficient and the squeezing load, and the lubricity was evaluated. The results are shown in Table 1. Test condition Pin material: JIS A 5056 material Block material: Standard block for Falex test Pin rotation speed: 290 rpm Acclimation load: 50 lbf Acclimation time: 1 minute Lubrication method: Coating 0.05 ml

Example 2 Paraffin-based 70 neutral oil /
The lubricity was evaluated in the same manner as in Example 1 using a mixture of 1 / octen-3-ol in a weight ratio of 80/20. The results are shown in Table 1. Comparative Examples 1 to 7 As the test oils, those shown in Table 1 were used and the lubricity was evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0016]

[Table 1]

[0017]

EFFECT OF THE INVENTION The lubricant of the present invention reduces the friction of the lubricated parts of various machines and, when used for various metal workings such as cutting, rolling, drawing, punching, etc., it reduces the friction for working. It is easy to use, and is particularly suitable for metal processing of aluminum or aluminum alloy, brass, magnesium alloy and the like.

Claims (4)

[Claims] 1. A compound represented by the general formula (I): A lubricant characterized by containing a compound represented by the formula: wherein R is a hydrocarbon group having 3 to 30 carbon atoms. 2. The compound represented by the general formula (I) is 0.5-0.5.
The lubricant according to claim 1, which contains 99.5% by weight. 3. A lubricant for metal working, according to claim 1 or 2.
Lubricant described. 4. The lubricant according to claim 3, wherein the metal processing is processing of aluminum or an aluminum alloy.