JPH08176586A - Water solubilized oil - Google Patents

Abstract

PURPOSE: To obtain the subject oil suitable for hydraulic facilities for assembly of automobile, having excellent wear resistance, flame retardance and stability in a wide temperature range without causing both rubber deterioration and release of coating compound, comprising a W/O type emulsion containing a polyalkylene glycol and a specific nonionic surfactant. CONSTITUTION: This oil comprises a W/O type emulsion containing (A) 1-90wt.% of a polyalkylene glycol, (B) 1-60wt.% of a specific nonionic surfactant [e.g. polyoxyalkylene alkyl (phenyl) ether] having 12-20 HLB and (C) 1-60wt.% of water. The component A has 100-50,000, especially 770-20,000 weight-average molecular weight and 1-100mm<2> /s, especially 5-80mm<2> /s viscosity at 40 deg.C.

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, deterioration of the rubber, peeling of the paint, and the like occur, and since separation is difficult, waste liquid treatment becomes a problem.

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 problem is that the wear resistance is poor.

[0004]

SUMMARY OF THE INVENTION The present invention provides a water-solubilized oil which is required to have good lubricity and long-term wear resistance.
An object of the present invention is to provide a water-solubilized oil having a wide solubilization temperature range and excellent abrasion resistance without impairing the basic property of the water-solubilized oil that is flame retardant.

[0005]

The water-solubilized oil of the present invention comprises:
1 to 90% by weight of polyalkylene glycol, HLB
1 to 6 of at least one nonionic surfactant having 12 to 20
It is a W / O type emulsion containing 0% by weight and 1 to 60% by weight of water.

The present invention will be described in detail below. The polyalkylene glycols that are the lubricating base oils in the present invention include structural formulas R ₁ O— (R ₃ O) _n —R ₂ (wherein R ₁ and 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, and R ₃ is a linear or branched alkylene group having 2 to 10 carbon atoms.). Examples thereof include polyethylene glycol, polypropylene glycol, ethylene oxide / 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 to 20,000 with a viscosity at 40 ° C of 1
mm ² / s~100mm ² / s, preferably 5mm ² /
s to 80 mm ² / s.

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

The nonionic surfactant has an HLB of 12 to 12.
It is a nonionic surfactant of 20, preferably 12 to 18, which makes it possible to provide excellent abrasion resistance when combined with a specific base oil.

Specific examples of the nonionic surfactant include:
Polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, aliphatic mono
Monocarboxylic / dialkylene oxide adducts of dicarboxylic acids, alkylene oxide adducts of aliphatic amines, Pluronic type nonionic surfactants, carboxylic acid esters, carboxylic acid mono- and dialkanolamides and their alkylene oxide additions Things etc. are 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 and polyoxyethylene oleyl diester.

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

Carboxylic acid mono- and dialkanolamides and their alkylene oxide adducts include lauric acid monoethanolamide, lauric acid diisopropanolamide, oleic acid monoethanolamide, oleic acid diethanolamide, stearic acid monoethanolamide and stearin. Acid diethanolamide, lauric acid monoethanolamide ethylene oxide adduct,
Lauric acid diethanolamide ethylene oxide adduct, oleic acid monoethanolamide ethylene oxide adduct, oleic acid diethanolamide ethylene oxide adduct, stearic acid monoethanolamide ethylene oxide adduct, stearic acid diethanolamide ethylene oxide adduct, etc. .

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 is 1% by weight to 60% by weight, preferably 5% by weight to 45% by weight.

The nonionic surfactant in the present invention is
It is used alone or in a mixture within the range of the HLB.

As is clear from the above Griffin equation, the HLB value shows a large value when the amount of alkylene oxide added is large, and it can be adjusted by the type of fatty acid and alcohol used, and the HLB value is calculated. Easily required.

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.
s, and preferably from 20mm ² / s~80mm ² / s.

In the water-solubilized oil of the present invention, if necessary, 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.

[0026]

The solubilized oil of the present invention has flame retardancy without causing deterioration of rubber or the like or peeling of paint.
The emulsion can be stable in a wide temperature range and can be excellent in abrasion resistance.

[0027]

[Examples] The properties of the water-solubilized oils obtained in the following Examples and Comparative Examples and the abrasion resistance test 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. While stirring with a hot stirrer, heat until the whole oil becomes cloudy. The temperature is raised up to 100 ° C. and then 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.

(Abrasion resistance test) The abrasion resistance test was carried out by the vane pump test under the following conditions.

Pump: V-104-C (manufactured by Tokimec) Rotation speed: 1200 rpm Discharge pressure: 140 Kgf / cm ² hours: 300 hours Liquid temperature: 30 ° C. Tank capacity: 30 liters (Examples 1 to 3, Comparative Example 1) ) A water-solubilized oil having the composition and properties shown in Table 1 was prepared, and the properties and measurement results of an abrasion resistance test are shown in Table 1 at the same time.

[0031]

[Table 1]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location C10N 40:08 (72) Inventor Toshiaki Kuribayashi 1-3-1 Nishitsurugaoka, Oi-cho, Iruma-gun, Saitama Prefecture Tonen Co., Ltd.

Claims (1)

[Claims] 1. Containing 1 to 90% by weight of a polyalkylene glycol, 1 to 60% by weight of one or more nonionic surfactants having an HLB of 12 to 20 and 1 to 60% by weight of water, A water-solubilized oil, which is a W / O type emulsion.