JPH07233390A - Water solubilized oil - Google Patents

Abstract

PURPOSE:To obtain the subject oil for a hydraulic facility, etc., capable of preserving a basic property of having a wide range of solubilizing temperature and of noncombustibility,. and prolonging a life of a roller bearing greatly, constituted by containing a multiple number of nonionic surfactants having a specified HLB. CONSTITUTION:This W/O type emulsion oil contains (A) 1-90 (wt.) % of a base lubricating oil, (B) 1-60% of one or more of nonionic surfactant having a HLB value of 1-12, (C) 1-60 % of one or more of nonionic surfactant having a HLB value of 12-20, and (D) 1-60 % of water. Further, it is preferable that a portion or all of the component (B) or (C) be a carboxylic acid mono- or di-alkanol amide and their alkylene oxide adducts of formula I and II (R1 is a 1-30C alkyl, an aryl, an alkenyl, an aralkyl; R2 is H or a 1-10C alkyl; each one of R3 and R4 is a 2-3C alkylene; m is 1-10; n is 0-30) and occupies 5-100% of the total nonionic surfactant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to water solubilization for use in steel equipment, die-casting machines, hydraulic equipment in automobile assembly equipment, and hydraulic equipment that is obliged to use non-flammable hydraulic fluid. Regarding oil.

[0002]

2. Description of the Related Art Hydraulic equipment such as welding equipment robots for steel equipment, die-casting machines, automobile assembly equipment, etc. that may cause fire and equipment that uses non-flammable hydraulic fluid have increased due to regulations such as the Fire Service Act. ing. Among these, water-glycol hydraulic oil is used as a hydrous hydraulic oil in various hydraulic devices. Usually, metal soap (anionic surfactant) is added to prevent the corrosion of metal. From the viewpoint, it is controlled to be alkaline. For this reason, there is a problem that the deterioration of the rubber, the peeling of the paint, and the like occur, and the separation of the components is difficult, so that the waste liquid treatment is difficult.

Water-solubilized oils containing anionic surfactants and water-containing lubricants are also known, but a hydraulic pump incorporates mechanical elements and rolling bearings that are in direct contact with the hydraulic oil. The rolling life is considerably shorter than that of mineral oil-based lubricating oil, which is a problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a water-solubilized oil that is required to have good lubricity and long-term rolling fatigue life, and has a wide solubilization temperature range and flame retardancy. An object of the present invention is to provide a water-solubilized oil that can dramatically extend the rolling bearing life without impairing the basic characteristics.

[0005]

The water-solubilized oil of the present invention comprises:
1 to 90% by weight of a lubricating base oil, and 1 to 60% by weight of at least one nonionic surfactant (A) having an HLB of less than 1 to 12.
And a nonionic surfactant (B) having an HLB of 12 to 20
1 or more of 1 to 60% by weight and 1 to 60% by weight of water, and is a W / O type emulsion.

The water-solubilized oil of the present invention comprises 1 to 90% by weight of a lubricating base oil, and 1 to 60% by weight of one or more nonionic surfactants (A) having an HLB of less than 1 to 12. And HLB
Contains 1 to 60% by weight of one or more nonionic surfactants (B) of 12 to 20 and 1 to 60% by weight of water, and the nonionic interface of (A) or (B) above. Part or all of the activator is represented by the following general formula (1) or general formula (2)

[0007]

[Chemical 2]

{In the general formula (1) or general formula (2), R
₁ is an alkyl group having 1 to 30 carbon atoms, an aryl group, an alkenyl group, an aralkyl group, R ₂ is a hydrogen atom, and 1 to 1 carbon atoms
The alkyl group of 0, R ₃ and R ₄ represent an alkylene group having 2 to 3 carbon atoms and may be the same or different, and m is 1 to 1.
0 and n represent the integer of 0-30. } Carboxylic acid mono- or dialkanol amide represented by the following and their alkylene oxide adducts, and the content of said carboxylic acid mono- or dialkanol amide and their alkylene oxide adduct is based on all nonionic surfactants. It is 5% by weight to 100% by weight, and is a W / O type emulsion.

The present invention will be described in detail below. As the lubricating base oil that can be used in the present invention, any one or more of synthetic oils and mineral oils having a lubricating or lubricating effect can be used.

As the synthetic type, polyalkylene glycol type, alkylbenzene, alkyldiphenyl ether, ethylene propylene copolymer, polyalphaolefin, alkyldiphenyl, alkylnaphthalene,
Examples include polybutene and ester oil.

The polyalkylene glycols are structural formulas mainly containing a polyalkylene glycol structure.
_{R 1 O- (R 3 O)} n -R 2 ( wherein, R _1, R ₂
Are hydrogen or an alkyl group having 1 to 10 carbon atoms or an alkylphenyl group, which may be the same or different. R ₃ is a linear or branched alkylene group having 2 to 10 carbon atoms. )
, Polyethylene glycol, polypropylene glycol, ethylene oxide
There are propylene oxide copolymers and the like, and examples thereof include monoalkyl ethers, monoaryl ethers, dialkyl ethers and diaryl ethers.

The weight average molecular weight range of the polyalkylene glycols is 100 to 50,000, preferably 7
70～20,000 is of 40 kinematic viscosity at ℃ is 1mm ² / s~100mm ² / s, preferably 5 mm ²
/ S to 80 mm ² / s.

Alkylbenzene has a straight-chain type and a branched type, and of these, a mono-form and a di-form can be mentioned. As a linear alkylbenzene,

[0014]

[Chemical 3]

(In the formula, R is a C ₁₂ -C ₂₅ alkyl group and may be the same or different.) Examples of the branched alkylbenzene include propylene trimer, tetramer, pentamer, hexamer, Alkylation of benzene with a heptamer,

[0016]

[Chemical 4]

(In the formula, R'is a C ₁₂ -C ₂₄ branched alkyl group, which may be the same or different.) As the alkyl diphenyl ether, diphenyl ether can be obtained by the Friedel-Crafts reaction or the like. Examples thereof include monoalkyl diphenyl ethers, dialkyl diphenyl ethers, and trialkyl diphenyl ethers synthesized by alkylation, and the alkyl group may be linear and / or branched.

The poly-α-olefins have a branch number of 2 to 14 carbon atoms, preferably 4 to 12 carbon atoms,
Alternatively, it is obtained by any one kind of homopolymer selected from olefinic hydrocarbons not having it or obtained by copolymerization of two or more kinds, and is selected from products having an average molecular weight of 100 to about 2000, preferably 200 to about 1000. However, those obtained by removing unsaturated bonds by hydrogenation are particularly preferable.

Examples of the ester base oils include polyol esters and diesters, which may be used alone or in combination. Examples of the ester such as a polyol ester and a diester include polyol esters of an aliphatic polyhydric alcohol and a linear or branched fatty acid, and a partial ester of an aliphatic polyhydric alcohol and a linear or branched fatty acid. , Dipentyl neopentyl glycol and linear or branched fatty acid having 8 to 20 carbon atoms, aliphatic polyhydric alcohol and 8 carbon atoms
20 complex esters of linear or branched fatty acid partial esters with linear or branched aliphatic dibasic acids or aromatic dibasic acids, linear or branched Examples thereof include dialkyl esters of aliphatic dibasic acids and dialkyl esters of aromatic dibasic acids.

The above-mentioned alkylbenzene, alkyldiphenyl ether, poly-α-olefin and ester oil have a kinematic viscosity at 40 ° C. of 1.0 mm ² / s to 10 mm.
0.0 mm ² / s, preferably 3 mm ² / s to 80 mm
² / s.

Further, as mineral oils, 60 neutral oil, 100 neutral oil, 150 neutral oil, 300 neutral oil, 5 by solvent refining or hydrogenating refining, 5
There are 00 neutral oils and the like, and low pour point base oils and the like in which the low temperature fluidity is improved by removing the wax content from these base oils, and these can be used alone or as a mixture in an appropriate ratio.

Among the above-mentioned base oils, polyalkylene glycols and alkylbenzenes are preferably used as the base oil in the water-solubilized oil of the present invention, and a mixture of these base oils with other base oils is preferably used. May be used.

The base oil is 1% by weight in the water-solubilized oil of the present invention.
The content can be up to 90% by weight, preferably 30% to 80% by weight.

Next, the nonionic surfactant will be described. The HLB that defines the nonionic surfactant in the present invention is calculated by the HLB of Griffin shown below.

In the case of a polyethylene glycol type nonionic surfactant, it is represented by HLB = E / 5 (where E represents the weight% of the polyethylene glycol portion), and the polyhydric alcohol type nonionic surfactant is also used. In the case of a surfactant, it is represented by HLB = 20 (1-S / A) (where S represents the saponification value of the polyhydric alcohol ester and A represents the acid value of the raw material fatty acid).

The nonionic surfactant (A) is a nonionic surfactant having an HLB of 1 to less than 12 and preferably 4 to 8, whereby the cloud point of the water-solubilized oil is lowered and the nonionic surfactant is broadened. It brings about solubilization (transparency) in the temperature range and contributes to exerting effects such as high stability in the low temperature region.

Further, the nonionic surfactant (B) is H
LB is a nonionic surfactant having an LB of 12 to 20, preferably 12 to 18, which raises the solubilization limit temperature of the water-solubilized oil, brings about solubilization (clearing) in a wide temperature range, and It contributes to exhibiting high stability and other effects in the region.

Specific examples of the nonionic surfactant include:
Polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, aliphatic mono
Dicarboxylic acid mono / dialkylene oxide adducts, aliphatic amine alkylene oxide adducts, pluronic nonionic surfactants, carboxylic esters, in the above general formula (1) or general formula (2) Carboxylic acid mono- or dialkanol amides represented and alkylene oxide adducts thereof and the like can be mentioned.

Examples of the polyoxyalkylene alkyl ethers include polyoxyethylene cetyl ether, polyoxyethylene oleyl ether and polyoxyethylene alkenyl ether.

Examples of polyoxyalkylene alkyl phenyl ethers include polyoxyethylene nonyl phenyl ether and polyoxyethylene dodecyl phenyl ether.

Examples of the mono-dialkylene oxide adducts of aliphatic mono-dicarboxylic acid include polyoxyethylene stearyl ester, polyoxyethylene oleyl diester and the like.

Examples of the alkylene oxide adducts of aliphatic amines include lauryl amine ethylene oxide adducts.

Examples of the carboxylic acid mono- or dialkanolamide represented by the general formula (1) or (2) include lauric acid monoethanolamide, lauric acid diisopropanolamide, oleic acid monoethanolamide and oleic acid. Examples thereof include diethanolamide, stearic acid monoethanolamide and stearic acid diethanolamide, and examples of alkylene oxide adducts thereof include lauric acid monoethanolamide ethylene oxide adduct, lauric acid diethanolamide ethylene oxide adduct, and lauric acid monoethanolamide. Ethanolamide propylene oxide adduct, lauric acid diethanolamide propylene oxide adduct, lauric acid monoisopropanolamide propylene oxide adduct, oleic acid monoethane Lumpur amide ethylene oxide adduct, oleic acid diethanol amide ethylene oxide adduct, stearic acid monoethanolamide ethylene oxide adduct, stearic acid diethanol amide ethylene oxide adducts.

Examples of pluronic nonionic surfactants include polypropylene glycol ethylene oxide adducts.

Examples of the fatty acid esters include lauric acid monoglyceride, pentaerythritol monopalmitate, and sorbit palmitic acid monoester.

In the water-solubilized oil of the present invention, the content of the nonionic surfactant (A) is 1% by weight to 60% by weight,
It is preferable to set it to 5% by weight to 45% by weight.

The content of the nonionic surfactant (B) having an HLB of 12 to 20 is 1% to 60% by weight, preferably 5% to 45% by weight.

The nonionic surfactants (A) and (B) in the present invention are used alone or in a mixture within the range of HLB specified by the respective nonionic surfactants (A) and (B). But nonionic surfactant (A)
Especially as (B), the above general formula (1) or general formula (2)
When a carboxylic acid mono- or dialkanolamide represented by and an alkylene oxide adduct thereof are used as a combined component, a more excellent rolling bearing life is exhibited. When these are used in combination, the content is preferably 5% by weight to 100% by weight in the total nonionic surfactant.

As is clear from the Griffin's formula, the HLB value shows a large value when the addition amount of alkylene oxide is large, and it can be adjusted depending on the kind of carboxylic acid and alcohol used, and the HLB value is calculated. Is easily sought.

In the water-solubilized oil of the present invention, the content of water is 1% by weight to 60% by weight, preferably 10% by weight to 4%.
It is good to set it to 0% by weight.

The water-solubilized oil of the present invention has the above composition and has a viscosity at 40 ° C. of 10 mm ² / s to 100 mm ² /.
s, and preferably from 20mm ² / s~80mm ² / s.

The water-solubilized oil of the present invention may optionally contain a rust preventive agent, a defoaming agent, a metal deactivator, an antiwear agent, an extreme pressure agent,
Friction modifiers, viscosity index improvers and the like can be added.

[0043]

The solubilized oil of the present invention does not cause deterioration of rubber or the like or peeling of paint, has flame retardancy, and can be a stable emulsion in a wide temperature range, and thus has excellent rolling fatigue life. In addition, some or all of the nonionic surfactants are carboxylic acid mono- or dialkanolamides represented by the above general formula (1) or general formula (2) and their alkylene oxide additions. It has been found that, when used as a product, the rolling fatigue life can be further improved.

[0044]

[Examples] The properties and rolling life tests of the water-solubilized oils obtained in the following Examples and Comparative Examples will be described.

(Properties of water-solubilized oil) 40 ° C. viscosity is JIS
According to K 2283, pour point is JIS K 2269
Appearance is 50m in 100cc beaker of prototype solution
It was put in 1 and visually discriminated. The phase transition temperature is 10
After putting 50 cc of the sample in a 0 cc Erlenmeyer flask and closing a rubber stopper with a thermometer, the thermometer is set at a position 1/2 of the liquid level. Heat while stirring with a hot stirrer until the whole oil becomes cloudy. After raising the temperature up to 100 ° C., the temperature is lowered at room temperature. After the white turbidity, the temperature at which the material became transparent when the temperature was lowered was visually read and used as the phase transition temperature.

(Rolling Life Test) The rolling life test was carried out using the following Uni-steel rolling life tester under the conditions shown below.

The Uni-steel rolling life tester rotates a ball bearing on a washer-shaped test piece, and the vibration of the test part caused by wear due to fatigue of the test piece on the track is 1.5 or less.
The test machine is stopped by the vibration meter for rotation stop adjusted so as to stop at G (gal), and the fatigue life time is obtained as the integrated time. This test was performed 5 to 10 times, the obtained data was accumulated 50%, plotted on the Weibull probability paper, and 10% life (time when the cumulative probability became 10%), 50% life (cumulative probability) Is the time when 50% becomes 50%).

(Tester) Uni-steel rolling life tester (IP [British Petroleum Institute] 305 / 75T compliant) (Test conditions) Rotation speed 1500 rpm Load 322.5 kgf Test bearing Thrust ball bearing # 2910 (NSK)
Made) Test piece SUJ-2 standard product (JIS G 48
05) Number of test balls 5 Lubrication method Drop method (10 drops / min) Stopping level 1.5G Number of tests 5 to 10 In addition, alkylene oxide adducts of aliphatic amines and carvone used in Tables 1 and 2 below. The structure of the alkylene oxide adduct of the acid mono- and / or dialkanolamide is as follows. In the structural formula below, l is
It is the number of moles of EO (ethylene oxide) added to lauric acid monoethanolamide ethoxylate in the table. Further, m + n is the number of EO additions in laurylamine ethoxylate and oleic acid diethanolamide ethoxylate in the table.

[0049]

[Chemical 5]

(Examples 1 to 5, Comparative Examples 1 and 2) Water-solubilized oils having the compositions and properties shown in Table 1 were prepared, and the properties and rolling test results are shown in Table 1 at the same time.

(Examples 6 to 11) Water-solubilized oils having the compositions and properties shown in Table 2 were prepared, and the properties and rolling test results are shown in Table 2 at the same time.

[0052]

[Table 1]

[0053]

[Table 2]

[0054]

Industrial Applicability The water-solubilized oil of the present invention has a wide solubilization temperature range and does not impair the basic characteristics of the water-solubilized oil such as flame retardancy, has a high waste liquid treatment property, and has a long rolling bearing life. It is an excellent water-solubilized oil that can dramatically lengthen.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C10M 133: 16) C10N 30:00 A 30:04 40:02 40:08 (72) Inventor Kuribayashi Toshiaki 1-3-1, Nishitsurugaoka, Oi-cho, Iruma-gun, Saitama Prefecture Tonen Corporation Research Institute

Claims (2)

[Claims] 1. A lubricating base oil of 1 to 90% by weight, at least one nonionic surfactant (A) having an HLB of 1 to less than 1 to 1 to 60% by weight, and an HLB of 12 to 20%. 1 to 60% by weight of one or more ionic surfactants (B) and 1 to 6 water
A water-solubilized oil containing 0% by weight and being a W / O type emulsion. 2. A lubricating base oil of 1 to 90% by weight, at least one nonionic surfactant (A) having an HLB of 1 to less than 1 to 1 to 60% by weight, and an HLB of 12 to 20% by weight. 1 to 60% by weight of one or more ionic surfactants (B) and 1 to 6 water
0% by weight, and part or all of the nonionic surfactant (A) or (B) is represented by the following general formula (1) or general formula (2): {In general formula (1) or general formula (2), R ₁ has ₁ carbon atom
To 30 alkyl groups, aryl groups, alkenyl groups, aralkyl groups, R ₂ represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, and R ₃ and R ₄ represent alkylene groups having 2 to 3 carbon atoms, which may be the same or different. May be, m is 1-10, n is 0
Represents an integer of 30. } Carboxylic acid mono- or dialkanol amide represented by the following and their alkylene oxide adducts, and the content of said carboxylic acid mono- or dialkanol amide and their alkylene oxide adduct is based on all nonionic surfactants. A water-solubilized oil, which is 5% to 100% by weight and is a W / O type emulsion.