JPS60501657A - water-based hydraulic fluid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] water-based hydraulic fluid Background of the invention This application is a continuation in part of Patent Application No. 374,157 filed March 3, 1982. It is a wish.

The present invention provides an improved high-water actuation system particularly suited for use in industrial hydraulic systems. liquid (high water-based hydraulic fluid) It is related to.

The technology of power transmission using hydraulic fluids is well established. various such as water and oil Incompressible liquids have been used as hydraulic fluids. Oil is a hydraulic system component like a pump. Reduces wear and tear on products, prevents rust formation, and has higher viscosity than water to prevent liquid leakage. It is superior to water as a working fluid in that it has less Unfortunately oil The major drawback is that it is easily flammable. Petroleum also causes water to enter the hydraulic system in which it is used. It is also sensitive to infiltration. Moreover, disposal of used petroleum-based hydraulic fluid is an economic problem. pose a question.

In recent years, because of its low cost, it has been developed to have good properties such as “great wear resistance”. Efforts have been made to create aqueous hydraulic fluids. Dithiophosphate for aqueous hydraulic fluids Extreme pressure (EP) additives such as (dithiophosphate) can be added to dispersants ( It is said that it is best to include it together with a dispersing agent. that This is because such P additives are hardly soluble in water. Also, water-based hydraulic fluid Since the viscosity of wood is low, various types of thickeners are added to it. It was also suggested that it includes However, various such thickeners exhibit shear instability. and this leads to a considerable viscosity reduction of aqueous hydraulic fluids containing such thickeners. .

For skin The present invention provides thickened oil-in-water emulsions. type, high viscosity, highly aqueous hydraulic fluid.

The term "highly aqueous hydraulic fluid" refers to approximately 80% by weight or more modifier) , (31 dispersant, and (41E P additive) all in specified proportions. Optionally, The hydraulic fluid of the present invention has various emulsions depending on the specific hydraulic system in which it is used. agents, corrosion inhibitors, defoamers, force/knobling agents, coagulation Point depressants and the like can be included. Combines the essential components of the hydraulic fluid and easily converts it into water. Creating a concentrate that melts and becomes hydraulic fluid. is preferable.

The high-aqueous hydraulic fluid of the present invention has a more stable viscosity than conventional aqueous hydraulic fluids. properties, lower abrasion and better pz lubricity.

To obtain high-aqueous hydraulic fluids according to the present invention, approximately 120 to 180 degrees Fahrenheit (49 to 80 degrees Fahrenheit) The lubricity modifier and the dispersion agent 11 are mixed together at a temperature of 2°C) and then heated. Stop and introduce the EP additive into the mixture. Then add water and it will become uniformly clear. You can get it easily. Mix this clear liquid with a thickener and add Soreki Rasara Gko 7k. Create a hydraulic fluid with the desired water content and viscosity. such as defoamers, corrosion inhibitors, etc. Optional components may be added at any appropriate time during liquor preparation.

The concentrate of the present invention can be mixed with a significant amount of water to provide superior lubricity and durability. It has abrasive properties, has a stable viscosity, and is used for fire-retardant effects, and can be used in place of standard hydraulic oil. This can reduce costs.

Preferred embodiment According to the invention, (1) polyether thickener, (2) lubricity modifier, (3) min. powder, a highly aqueous hydraulic fluid consisting of (41E P additive and (5) water and diluted with water) A concentrate is provided that is capable of producing such a hydraulic fluid. subordinate Conventional corrosion inhibitors, defoamers, metal deactivators, and the like may be included in the composition.

It has been demonstrated that such a hydraulic fluid undergoes almost no viscosity reduction during use.

Lubricity modifier Lubricity modifiers used in the novel hydraulic fluids of the present invention include water-immiscible liquids and Includes liquids that are miscible with, soluble in, or dispersible in water, and mixtures thereof. . These lubricity modifiers increase the lubricity of hydraulic fluids and are useful in hydraulic systems where hydraulic fluids are used. It also acts as a plasticizer to prevent the formation of sticky deposits in the water. Moreover, in the following High concentrations of water-miscible or water- such as alkylene glycols defined in more detail Dispersible fluids improve the fluidity and low temperature properties of hydraulic fluids.

The water-immiscible liquid used as a lubricity modifier is aliphatic-1 alicyclic-1 and aromatic hydrocarbons; chlorinated hydrocarbons; mineral oil; dimethyl-1 and methylphenyl Silicone oils such as silicone; vegetable oils, fish oils, fatty acids, fatty alcohols and fats Fats such as acid amines; condensation products of fatty acids and alkanolamines - these are May be modified with phosphate; ethoxylated fatty amide; Ethylhexyl sebacate or azelate and trimethylolpropane trica Organic esters such as prelates; glycols and polyglycols; triisopropylene triallyl phosphate esters such as lopylphenyl phosphate; and polylaene Contains liquids such as ether.

One group of preferred lubricity modifiers are synthetic hydrocarbon oils of lubricating viscosity. 9 letters Such oils have a viscosity of 50 to 700 Seyholt uniforms at 100°F (37,8°C). It is in the range of one monkey second (SLJS). Such synthetic hydrocarbon oils are usually of low grade Polymerizing the monoolefin in the presence of a suitable catalyst such as BP or AρCA3 Examples of lower olefins include ethylene, propylene, butylene, etc. is included. Other synthetic hydrocarbon oils include poly-alpha-olefins and alkyl hene oils. It is Zen. Such synthetic hydrocarbon oils are sufficiently fluid at low temperatures.

As a lubricity modifier that is immiscible with water, is it actually a tumarafin type or a naphthene type? It may contain either naturally occurring hydrocarbons, such as mineral oil. like that Mineral oil has a viscosity of 50 to 7005 LISO at 100'F (37,8°C). have

The preferred mineral oil for use in the hydraulic fluid of this invention is 80°C at 100°F (37.8°C). It is a naphthenic light lubricating oil with a viscosity of ~200'SUS, and is particularly preferred for this type. Preferred oils have a viscosity of 100-150 SUS at 100°F.

Another group of preferred lubricity modifiers are condensation products of fatty acids and alkanolamines. It is. These products, which are dispersible in water, can be used in a temperature range of the order of 100-150°C. A fatty acid or a fatty acid ester is reacted with an alkanolamine to form condensed water or alcohol. It can be created by removing the core.

The molar ratio of fatty acid or ester to amine ranges from about 2:1 to about 1:3. It is. Optionally, a small amount of phosphoric acid is present during the reaction, for example from 0.01 to 0.05 mol. It's okay.

The fatty acids used in the condensate production generally range from 7 to 22, more preferably from 12 to 18. It must contain 6 carbon atoms.

It may be saturated or unsaturated, or a mixture of both. So Here, fatty acids suitable for making condensates include heptanoic acid, caprylic acid, and penetrating acid. Tergonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid These include behenic acid, oleic acid, and behenic acid.

A preferred fatty acid reactant is a mixture of stearic acid and oleic acid.

Alkanolamines that have been found useful in making condensates include Tanolamine, isopropanolamine, N-methylethanolamine, gel Tanolamine, dibrobanolamine, diisopropanolamine and tolie Contains tanolamine. Particularly preferred alkanolamines are jetanolamines. It's Min.

Another group of preferred water-soluble or dispersant lubricity modifiers are ethoxylated fatty acids. Mido, amine, alcohol and vegetable oil. These fatty alkyl groups are usually Contains 7 to 22 carbon atoms, more preferably 12 to 18 carbon atoms No. Such alkyl groups include heptanoyl, caprylyl, and nonanoyl. oleyl, capryl, lauryl, myristyl, stearyl, oleyl, and behenyl. included. Such lubricating ltJm agents include valmitine, coconut two, Plants such as castor rapeseed, soybean, corn, peanut butter, sunflower oil, etc. It may consist of fats derived from natural oils.

In addition, such fats may be derived from animal fats such as tallow, lard, fish oil, etc. You may.

The degree of ethoxylation of these water-soluble/dispersible lubricity modifiers is , 1 to 20 mol per mol of amine, alcohol or vegetable oil, more preferably 4 There should be ~6 moles of ethylene oxide.

A preferred layer of the water-soluble lubricity modifier has the structural formula RO(CnH2°0)XH. alkylene and polyalkylene glycol; in this formula, R is hydrogen or is an alkyl group containing 1 to 10 carbon atoms, n is an integer from 2 to 6, and X is 1 or It is an integer from 70 to 70. Alkylene glycols include ethylene and propylene Glycols and their higher congeners such as diethylene and dipropylene glycols Including calls. A preferred alkylene glycol is ethylene glycol.

Suitable water-miscible or water-dispersible polyoxyalkylene glycols include the molecule Polyoxyethylene-, polyoxypropylene in amounts from about 200 to about 4,000 There are poly(oxyethylene, oxypropylene) glycols. these The polyglycol has a tip camped with a lower alkyl group containing 1 to 1 carbon atoms. It may or may not be done.

Oxyethylene in poly(oxyethylene, oxypropylene) glycol The weight percent should be on the order of at least about 20%. Particularly preferred polyglyco Poly(oxyalkylene) with a molecular weight of about 1.500 to about 4,000 -oxy-1,2-propylene) glycol monophthyl ether.

Generally, the lubricity modifier will represent about 0.50 to about 20% by weight of the hydraulic fluid. . Preferred hydraulic fluids of the present invention are: 1. Contains a lubricity modifier on the order of 0-10% nothing.

thickener The polyether thickener used in the hydraulic fluid of the present invention is a relatively high molecular weight polyester. A xyalkylene compound, also referred to as polyether polyol in the text. child This may be camped by an α-olefin oxide. Thickener is water soluble or at least water dispersible. Preferred thickeners are about 20-3 α-olefin containing 1,2-propylene oxide groups on the order of 5% by weight Camped polyoxyethylene-polyoxypropylene block copolymerization It is the body.

Preferred polyether thickeners useful in the aqueous hydraulic fluids of the present invention are: There are two types of normally liquid polyether polyols. Both types tyrene oxide with at least one lower alkylene oxane having 3 to 4 carbon atoms and an active hydrogen compound. However, one thing In thickeners, this active hydrogen compound also has two or more hydroxyl groups in the molecule. In other types of thickeners, it contains 4 to 30 fatty acids in the fatty group. , more preferably an aliphatic-hydric alcohol containing up to 12 to 18 carbon atoms. be. These polyethers, which in both cases are hetero or block copolymers, Lupolyol is about 12-30. More preferably 12 to 18 aliphatic carbon atoms Oxy-nobu is produced by reaction with α-olefin oxide. but active These thickeners whose hydrogen compounds are diols or polyols are It may be used uncapped only if it has a high molecular weight. So like that The uncapped polyether polyol has a molecular weight of at least 7.000. It must have a molecular weight as high as 75,000. this Preferred non-oxidized polyether polyols of the species range from about 10,000 to It has a molecular weight of up to 30°000.

If the copolymer thickener whose active hydrogen compound is a diol or polyol is α- When capped by reaction with olefin oxide, its molecular weight is 7,000 ~15,000, more preferably about 12,000 to 14,000 Must be in the range 0. In both cases, i.e. the polyether polyol It may have a relatively high molecular weight, greater than 20,000, or it may have a relatively low molecular weight, e.g. ．． 000 or less, the weight percent of ethylene oxide groups is 25% to 80 Must be on the order of %. More preferably, the copolymer has a content of about 20% or more. This is the case when it contains 35% of 1,2-propylene oxide groups.

Diols used in the reaction as active hydrogen-containing compounds include ethylene glycol, Glycols such as diethylene glycol and higher glycols may also be used. stomach. The diol may contain an oxyalkylene group. active hydrogen compounds and Typical polyols used as and trimethylol propane.

In producing these polyether polyols, ethylene oxide and low A liquid in which M compound containing grade alkylene oxide is uniformly dispersed with a suitable catalyst. obtained by intimate contact with the diol- or polyol-starting compound in the phase. It will be done. Preferred catalysts are sodium hydroxide and potassium hydroxide. The reaction is 50 It is carried out at temperatures on the order of ~160°C.

Such polyether polyols in which the active hydrogen compound is a diol; The method for making them is described in detail in U.S. Pat. No. 2,425°845, the disclosure of which is incorporated herein Inserted as a reference in the text.

As mentioned above, polyether polyols containing diols or polyols are It can also be used as a catalyst, or it can be capped with α-olefin oxide. stomach. Advantageously, a substantially smaller amount of capped polyol is more active than water. aliphatic-hydric alcohols, whether containing diols or polyols as elementary-containing compounds; - operation for a given viscosity compared to an uncapped polyol It can be used to make liquids. Thus, for example in the hydraulic fluid of the invention , 4.8 parts by weight of capped thickener has a viscosity of 190-200S at 100°F It was found that US hydraulic fluid can be made, but compared to this, it has a thickened viscosity that is not capped. Even if 12.5 parts of the agent is used, only a viscosity of 75 to 80 SUS can be obtained (examples described below). (See I and ■).

Used to modify or cap polyether polyols as described The α-olefin oxide has about 12 to 30, more preferably about 12 to 18 molecules. Contains aliphatic carbon atoms, or mixtures thereof. . Obtain the desired thickener The amount of α-olefin oxide required for It is about 1 to 20% by weight.

The camping reaction converts α-olefin oxide into polyether polyol (liquid body) and about 1-20% weight depending on batch size at a temperature of 50-90°C. This is done by heating the mixture. Before adding α-olefin oxide , it is desirable to make the polyether polyol as anhydrous as possible.

A second type of preferred thickener is ethylene oxide, a lower alkylene oxide. side and 4 to 3 o, more preferably 12 to 18 aliphatic carbon atoms. 12 to 30 hetero- or block copolymers with aliphatic alcohols. It is capped with an α-olefin oxide containing an aliphatic carbon atom.

Such thickeners and methods of making them are disclosed in U.S. Pat. No. 4,288,639. and the disclosure of that patent is incorporated herein by reference.

Preferred for reacting with ethylene oxide and lower alkylene oxide Typical alcohols include butyl alcohol, caprylic alcohol, and laurel. Lyru alcohol, myristyl alcohol, stearyl alcohol, cetyl alcohol alcohol and beheryl alcohol. The reaction is based on the well-known alkaline oxyalkaline Killing catalysts - carried out using strong bases such as sodium and potassium hydroxide It will be done. The reaction can also be carried out in the presence of an inert organic solvent. Examples of such solvents Examples include aliphatic hydrocarbons such as hexane and heptane; benzene and toluene. Aromatic hydrocarbons such as ethylene dichloride; chlorinated hydrocarbons such as ethylene dichloride.

The reaction temperature is on the order of 50-160'C as mentioned above.

The preparation of the latter polyether polyols is well known to those skilled in the art. lower alkylene -More details of the preparation of heterocopolymers of oxides are hereby inserted by reference. No. 3,829,506. Lower alkylene oxy Additional information regarding the preparation of block copolymers of Found in '7 issue. This is also inserted here by reference.

Here are polyether polyols whose active hydrogen compound is an aliphatic alcohol. Camping with α-olefin oxide may be performed as described above.

The molecular weight of the camped thickeners discussed last above is approximately 7°000 to 15,000. Must be in the range 0, more preferably in the range 12,000-14,000. stomach.

Other polyether polyols which can be capped to become thickeners according to the invention and Their manufacturing methods are described in U.S. Patent No. 2,425°755, U.S. Pat. No. 3,595,924, No. 3,706,714 and No. 3,829,505; and British Patent Nos. 950,844 and 1,228.561. child The disclosures of some of these are incorporated herein by reference.

In the hydraulic fluids of the present invention, thickeners generally represent from about 1.5 to about 15% by weight. child The amount of circle. As mentioned above, capped thickeners are larger than uncapped thickeners. Has thickening properties. Therefore, if you use a capped thickener, you can achieve the desired viscosity with a smaller amount. This provides the hydraulic fluid of the present invention with 10-15% uncapped thickener. It is preferable to include.

By using a preferred amount of thickener, the hydraulic fluid will have a thickness of about 50 to about 20 at 1000F. It will have a viscosity in the O3US range.

dispersion A useful dispersant included in the hydraulic fluid of the present invention is alkenyl-succinic anhydride or -succinic anhydride. and a water-soluble active hydrogen compound, an example of which is a dialkylalkanolamine. It is a product. These dispersants include oil-soluble EP additives such as zinc dialkyldithiophosphate. It is particularly useful for dispersing additives in aqueous liquids. In this aqueous liquid it is anti-wear It acts as a component and provides EP properties.

The alkenyl-succinic anhydride or -succinic acid with which the active hydrogen compound is reacted can be prepared using a general method. It is made by reacting maleic anhydride with long-chain alpha-olefins.

The olefin is mixed with maleic anhydride (or maleic acid) at a temperature of 150-250°C. The amount of olefin used is at least stoichiometrically equivalent to the maleic anhydride reaction. The amount is equal to the body. Preferred olefin reaction products have 500 to 2,000 olefins. The molecular weight of the molecule, more preferably about 800 to 1,200, particularly preferably about 1° The succinic anhydride reaction product has a chain length of sufficient to obtain a succinic anhydride reaction product with a molecular weight of Polyisobutyne.

As for the other reactants, they are active hydrogen compounds, with the formula an alkylalkanolamine, where R is hydrogen or 8 to 24 carbon atoms; R1 is hydrogen or (CzH40)xH or (C3HbO ) xH, RII is R or R1, and X is an integer from 1 to 50. Special The preferred alkylalkanolamine reactant is diethylethanolamine. Ru.

Alkenyl-succinic anhydride or other active hydrogen compounds that react with succinic acid have the following structure: It has a formal structure.

HO(Z)yOR”’ HO(Z)yR” or Here, Z is (C2H40) or (C3H60), and R'' is 8 to 20 carbon atoms. R'' is or 3 R111, RV is R1 or 1 to 4 carbon atoms an alkyl group containing atoms, and y is an integer from 3 to 10; R1″ is 08 It is preferable that y is 5 in the ~C7 alkyl group.

Alkenyl-succinic anhydride or -succinic acid is mixed with an active hydrogen compound at about 50-250°C. preferably at a temperature of 60 to 150°C for a period sufficient to obtain the desired reaction product; Usually, the reaction is allowed to take place for 1 to 6 hours. What are the relative amounts of anhydride and active hydrogen compounds? Although it may vary, in order for the anhydride to react completely, the amount of Preferably, 2 moles of such compound are used.

For proper dispersion of EP additives and other water-insoluble components in the aqueous phase of the working fluid The hydraulic fluid must contain about 0.5% to about 5.0% dispersant, preferably 1% to 3%. Must be.

Layer pressure” brother and additive layer The extreme pressure (EP) additives used in the hydraulic fluid of the invention each have the following structural formula: thiophosphate or dithiocarbamate, where RV is 4 to 16, more preferably is an alkyl group containing 4 to 10 carbon atoms, phenyl or naphthyl, and X is hydrogen; Amine, ammonium, substituted ammonium compound, Group I and ■ of IIJI rate table metals, i.e. alkali metals such as sodium, potassium or lithium, usually Alkaline earth metals such as magnesium or calcium, Group II transition metals - e.g. Manganese, zinc (especially zinc is preferred), antimony, or Mo2S at 20° , and a is an integer of 1 or 2.

Dithiophosphate is an alcohol-containing phosphorus pentasulfite (phosphor). ous pentasulfide) at a temperature of 40 to 120°C for 1 to 4 hours. It can also be created by letting

Typical alcohols used in this reaction are n-butyl, n-heptyl, n-octyl, Common alcohols such as chloro, n-decyl and n-dodecyl alcohols . Suitable branched chain alcohols include 2-methyl-1-pentanol, 2-ethyl -1-hexanol and 2,2-dimethyl-1-octatool.

Organic- or inorganic bases can be reacted with dithiophosphate and introduced into the working fluid. It is also possible to make special EP additives.

Reaction with non-metallic bases such as amines, ammonia and substituted ammonium compounds Ash-free dithiophosphates can be obtained by: metal oxide or Reaction with hydroxide produces an ashed dithiophosphate. This is due to its characteristics That said, it's usually preferable.

The most commonly used metals are those in groups 1 and 2 of the decoy table, namely sodium; Alkali metals such as potassium and lithium and usually magnesium or calcium alkaline earth metals such as aluminum, and group II transition metals, especially zinc, which is particularly preferred. is). Metals are commonly combined with dithiophosphates in the form of oxides or hydroxides. It is used in the reaction.

The reaction between the dithiophosphate and the base is generally carried out at a temperature of 75 to 150°C for 1 to 4 hours. carried out over a period of time.

The EP additive is in an amount of about 0.125-1.25%, more preferably 0.5-0.75%. % should be present.

Dithiocarbamates are well-known compounds and are generally prepared by combining a suitable amine with carbon disulfide. Obtained by the reaction of

optional additives In addition to the essential components listed above and water, the hydraulic fluid contains other substances - emulsifiers, corrosion inhibitors. Anti-foaming agents, defoaming agents, campling agents, etc. le-Balance) (HLB) is an emulsifier in the range of 3 to 20 ( Published by TCI United 5tates, Inc. (19 76) See Chapter 1 of “HI-B System”). Examples of such emulsifiers are those in which the alkyl group is Ethoxylic acid containing 14 to 24 carbon atoms and having between 3 and 10 ethoxy groups A sylated alkylphenol or an alkylamine. Long chains - e.g. CB-C8 8 alcohols are also used as co-emulsifiers.

Although the hydraulic fluid may contain up to 1.5% of such emulsifier, the preferred amount of emulsifier is about The content ranges from 0.45 to 1.2%.

Various silicone defoamers in small amounts, e.g. up to 0.5%, may be added in small amounts - e.g. up to 0.1%. Various corrosion inhibitors in - examples include benzotriazole and toltriazole , contained in the hydraulic fluid. As a vapor phase corrosion inhibitor, it reacts with succinic anhydride to produce the aforementioned Various water-soluble alkyl alkanolamides of the type used to form dispersants. can be used. If it is not included as a lubricity modifier, ethylene Adding a sufficient amount of a freezing point depressant such as a glycol lowers the freezing point and makes it easier to use. It can also prevent freezing at temperatures encountered during use.

Water-dilutable concentrates are first developed to limit transportation and storage costs. It is preferable that the working fluid can be obtained simply by preparing the liquid and adding an appropriate amount of water thereto. So A concentrate such as the one shown in Table 1 below may be used.

Lubricity modifier 5-40 10-2゜ Thickener 5-20 12-18 Dispersant 5-20 10-Step 5 EP additive 1-10 2-6 Water Remaining Remaining When making the hydraulic fluids of the present invention, oil-soluble lubricity modifiers, dispersants and Mix together the EP additives and heat to about 130-150'F (54.4-65.6 Heat at a temperature of 3C to 45 minutes (°C). Such as corrosion inhibitors, defoamers, emulsifiers, etc. and various optional additives, heated to 150-160°F (65.5-71°1°C). water-miscible lubricity modifier (if any). otherwise it seems Add the optional additives directly to the mixture containing the oil-soluble lubricity modifier and the EP additive. It's okay. In that case, combine the two mixtures without heating, add water, and mix the mixture for 45 minutes. Mix for ~60 minutes to create a translucent liquid containing 35-45% water. Then mix the rice The product is combined with an appropriate amount of thickener and water to achieve the desired moisture content - usually 80% or more - and viscosity. A working fluid with a high degree of strength is produced.

In order to provide a better understanding of the invention, some examples are now described. This is simply It is for illustrative purposes only and does not imply that the scope of the invention is limited to this detail. It's not.

heaven - example ■ The hydraulic fluid of the present invention having the composition shown in the table can be used by the following people (al polyisobutenyl). succinic anhydride (average MW 100O) and diethyl Reaction product with ethanolamine 1.17(b) Amide'0. 9 (C) E P additive 2 0.38 fd) Polyglycol 3 o, 5 jej thickener' 12.5 (f) Diethylethanolamine 0.5 (gl additive 5 0.06 (h) Water remaining Note 1. Approximately 1.5 moles of jetanolamine, approximately 1 mole of stearic acid, and oleic acid. Phosphoric acid obtained by reacting a phosphoric acid mixture in the presence of about 0.03 mol of phosphoric acid -modified condensate Note 2. Dialkyl (C4-C+o) zinc dithiophosphate 3. Poly (Okijiji) Monobutyl ether of ethylene-oxy-1,2-propylene) glycol (M W1500-4000) Note 4. Poly(oxyethylene (75%)-oxy-1,2-propylene) Recall (M buttocks 25,000-30,000) Note 5. Penzotriadur and and silicone defoamer component a) 23.3 parts by weight, component (b) 18.0 parts, and Mix 7.5 parts of component (C) and heat to 130-150°F (54°-65.6°C). ) for 30-45 minutes. Additives, ingredients (gl, 1.2 portions 150-16 Heat to 0°F (66-71°C) and dissolve in 10.0 parts of component (d).

The two mixtures were combined; the heat was removed and the water was added to 40% by weight of the final mixture. I added an amount. Mix the resulting honey for 45-60 minutes to obtain a homogeneous translucent liquid. .

Add 5 parts by weight of the translucent liquid prepared above to diethylethanolamine, component if), combine with part 12.5 and add water so that the total amount of all substances becomes 100%. Make it. The resulting hydraulic fluid has an initial viscosity of 75-8 at 100'F (37,8°C). The following pump test was conducted using the hydraulic fluid of 0SU Example ①.

Pump Vickers V-104-C-10 Hoenbump pressure psi 8 00 (56Kg/cmf) Speed rpm 1200 Output (theoretical) gpm 7.5 Filter size, micron 10 Ring wear loss mgs 167 F3 244 Vane wear loss mgs 5 3 Total wear loss 1683 247 Wear rate mgs/hr 12. 2 5. 5 viscosity loss % 2. 3 5.　 6 Duration time Hours 138 45 Example■ ■The hydraulic fluid of the present invention having the composition shown in the table was prepared by the following method (81 polyisobutenyl succinic anhydride (average MW 100O) and diethyl Reaction product with ethanolamine 1.17 (b) Amide 1 o, 9 (C) E P additive 2 0.38 (di polyglycol 3 0/5 (e) Thickener 4 4・8 ([1 diethylethanolamine 0.5 (gl additive SO, 06 (h) Water remaining Note 1. About 1.5 moles of jetanolamine to about 1 mole to about 0.03 moles of phosphoric acid by reacting with about 1 mole of a stearic and oleic acid mixture in the presence of phosphoric acid-denatured-condensation product obtained by Note 2. Dialkyl (04~C1°) zinc dithiophosphate 3. Poly (Oxie tyrene-oxy-1,2-propylene) glycol (MW1500-4000 ) monobutyl gas-treated poly(oxyethylene (75%)-oxy-1, 2-propylene) glycol (MW12,000-15,000) Note 5. 23.3 parts by weight of benzotriazole and silicone defoamer component (a), Mix 18.0 parts of component (b) and 7.5 parts of component (C), Heat to 54°F (54°C to 65.6°C) for 30 to 45 minutes. Added calories, ingredient g l, 1.2 parts heated to 150-160°F (65,6-71.1°C) ingredients (d) Dissolved in 10.0 parts. The two mixtures were combined; remove the heat and drain the water. The amount was added to give 40% by weight of the final mixture. Batch produced for 40-60 minutes Mix to obtain a homogeneous translucent liquid.

Five parts by weight of the translucent liquid prepared as above were added to the thickener, component (e), 4.8 Combine parts and diethylethanolamine, ingredients (fl, 0.5 parts, all materials Water was added so that the total amount of water was 00%. The generated hydraulic fluid has a temperature of 100°F ( It showed an initial viscosity of 190 to 200 SUS at 37.8°C).

11 cases J The following pump test was conducted using the hydraulic fluid of Example (2).

Pump Vickers V-104-C-10 pumping vane pump pressure psi 1000 (70,:3Kg/cffl) Speed rpm 1200 Output (theoretical) gpm 7.5 Reservoir temperature 120 (49℃) Filter size, micron 10 Test results Test #1 Lazy plexus Ring wear loss mgs 1871 885 Vane wear loss mgs 35 15 Total wear loss 1906 900 Wear rate mgs/hr 20. 7 20. 0 viscosity loss %5. 2 2. 6 Duration time hours 92 45 Example■ (2) The working fluid of the present invention having the composition shown in the table was prepared three times by the following method.

(a) Dispersant + 1.06 (b) Hydrocarbon oil 2 0.80 (C) E P additive 3 0.34 (dl polyglycol 4 5.0 Fel thickener 5 5.0 (fl Attachment 6 0.Oj Note 1. Polyisobutenyl succinic anhydride (Hei 1-1000) and ethoxylation (3 -10 ethoxy group) fatty (c,□~C24) amine.

Note 2. Polybutene (viscosity ~400SUS, 100°F (37.8°c) ) Note 3. Dialkyl (Cz~Cl0) dithimee zinc phosphate Note 4. Poly (Oki) cyethylene-oxy-1,2-propylene) glycol (MW1500-400 0) monobutyl Evol (oxyethylene (75%)-oxy-1,2-propylene) Lopyrene) Glycol (MW25,000-30,000) Note 6. Benzot 21.2 parts by weight of lyazole and silicone defoamer component (a) and ingredients (bl16. Mix 0 parts and heat to 130-150°F (54.4-65.6°C) at 45-60°C. Heated for minutes. Remove the heat and remove the components (C16, 7 parts and the components (gB, 5 parts). and the mixture was heated for 30-45 minutes.

Additives, ingredients (fl, 0.9 parts) at 150-160°F (65°6-71.1°C ) was dissolved in 4.5 parts of heated ingredient (h). The two mixtures were combined. water, final Add an amount ζ to give 43.2% by weight of the mixture. Generate 1 piece of notch for 45 Mix for ~60 minutes to obtain a homogeneous translucent liquid.

Add 5 parts by weight of the translucent liquid prepared above to thickener, 5 parts of component (e) and The liglycol component (dl, will combine with the 5 parts, and the total of all + A ingredients will be 100%. Added water to sea urchin. The resulting hydraulic fluid has an initial viscosity of 1 at 100°F (37,8°C). 50 to 250 SUS.

Implementation-U1■ A test pump of the same type as in Example ■ and ■ Table using the working fluid of Example ■.

and the following pump test was conducted using the same test conditions.

Elapsed time hr 307 452 336 300 Ring wear loss mgs 6 02 1184 424 997 Vane wear loss mgs 30 33 25 1 1 Total wear loss 650 1217 449 1008 Viscosity change % +21.0 −12.2 Zero +5.3 Example ■ (2) The working fluid of the present invention having the composition shown in the table was prepared 8 times by the following method.

(a) Polyisobutenyl succinic anhydride (average M fathom 1000) and diethyl ethyl Reaction product with tanolamine 1.25 (bl amide 1 1.0 (CI E P additive 2 0.5 (d) Polyglycol 3 2.19 (e) Thickener' 12.0 (f) Diethylethanolamine 0. 5fg) Additive S O,06 (h) Water remaining Note 1. About 1.5 moles of jetanolamine, about 1 mole, about 0.03 moles of phosphorus By reacting with about 1 mole of a stearic and oleic acid mixture in the presence of acid. Phosphoric acid-modification-condensation product obtained by Note 2, dialkyl (C4-C,O) zinc dithiophosphate 3. Poly (Oxie tyrene-oxy-1,2-propylene) glycol (MW1500-4000) monobutyl ether Note 4. Poly(oxyethylene (75%)-oxy-1,2-propylene) glycerin Call (MW25.000-30.000) Note 5.　Hencitriazole and Silicone defoamer Add 10.0 parts by weight of the translucent liquid prepared as above to the thickener and ingredients. (e), 12.0 parts and diethylethanolamine, component (fl, 0.5 parts Combined with Hiroshi of all ingredients and added star water to make the total 100%. The generated hydraulic fluid is It exhibited an initial viscosity of 70-75 SUS at 100°F (37.8°C).

Lost - once at a glance The following pump test was conducted using the hydraulic fluid of Example (2).

Pump Vickers V-104-C-10 vane pump pressure psi 1 000 Speed rpm 1200 Output (theoretical) gpm 7.5 Reservoir temperature 125-140 (51,6-60℃) Filter size, Micron 10 Test results Ring wear loss mgs 85 113 Vane wear loss mgs 9 1 Satoshi wear loss 94 114 Wear rate mgs/hr 0. 36 0. 95 viscosity loss % 1. 4 3. 8 Duration time hr 264 120 Length-h can example■ The following Bonptes V was carried out using the hydraulic fluid of Example (2).

Pump Vickers V-104-C-10 Hoehn pump pressure psi 1 000 Speed rpm 1200 Extrusion ff1. (Theoretical) gpm 25 Reservoir temperature °F 120 (49 °C) Filter size, micron 25 Test results Test #1 Test #2 Ring wear loss mgs 300 100 Vane wear loss mgs 4 5 Total wear loss 304 106 Wear rate mgs/hr O,990,34 Viscosity loss % 3.5 14.8 Duration time hr 308 308 Example X A working fluid of the present invention having the composition shown in Table XI was prepared by the following method.

(a) Dispersant' 2.50 (b! Hydrocarbon oil” 1.50 (C) Diethylethanolamine 0.72 fdl E P additive 3 0.65 (el fatty alcohol 0.42 (f) Additive’ 0.23 fgl ethylene glycol 2.50 fhl thickener 5 3.00 (1) Water remaining Note 1. Polyisobutenyl succinic anhydride (average MW 100O) and ethoxylation (3 -10 ethoxy group) fatty (c,□~c24) amine Note 2. Naphthenic mineral oil (viscosity ~100SUS, 100°F) Note 3.　Dialki (04~C1°) Zinc dithiophosphate 4.　Benzotriazole and silicon removal Foaming agent poly(oxyethylene (75%)-oxy-1,2-propylene) glyco (112,000-15,000) component (a138.5 part and component (b) )14. ．． Mix 0 parts and heat to 130-150°F (54-66°C) 45-6 Heated for 0 minutes. Remove the heat and combine the component (C111,0 part and the component (dllo, 0 and the mixture was mixed for 30-45 minutes. Henctriazole 0 ．． Dissolve 3 parts in 6.5 parts heated to 150-160°F (66-71°C). I understand. The two mixtures were combined. Add 10.7 parts water and let the mixture stand for 45-60 minutes. Mix for a while to obtain a uniform semi-clear liquid.

6.5 parts by weight of the translucent liquid prepared above was mixed with 87°8 parts of water and ethylene chloride. Recall 2.5 parts, ingredients (i13.0QIi parts, and silicone defoamer 0.2 parts) It united with minutes. Mix this mixture for 45-60 minutes until a uniform translucent product is obtained. It matched. The initial viscosity of the produced hydraulic fluid was 210 to 320 SUS.

Example XI The hydraulic fluid of Example X was subjected to a pump test. In this case, other than the duration of the exam, Example ① The same type of pump and the same conditions as in Table 7 were used. These test results Shown in the HI table below.

Core test number Ka1 #'2-,,p3 Dan Soy sauce - Duration hr 1146 1008 616 232 881 Ring wear loss mgs 54. 181 12 11 13 Blade wear loss mgs 33 20 19 7 25 Total wear loss Loss mgs 87 201. 31 18 38 Wear rate mgs/hr O, 0 80,200,050,080,04 The hydraulic fluid of Example X was used for the next pump test. ;Suda. The test conditions used and results are shown in the following table.

Pump Vickers 25 V17 8 intrahanbonf.

Pressure psi 1000 (70.3kg/cm2) Speed rpm 1200 Output (theoretical) gpm 17 Reservoir temperature 0F 115-120 Filter size, micron 25 Duration time hr 1172 476 1148 Ring wear loss mgs zero 5170 Blade wear loss mgs 6 5 17 Intravane wear loss mgs 2 3 5 Total wear loss mgs 8 13 194 Wear rate mgs/hr O,00? 0.027 0.17 viscosity; first Final viscosity (SUS) 303 225 230 Final viscosity (SO3) 252 2 45 247 Note 1: Tests 1 and 2 are Vickers 282 series Höhn The test was carried out using a pump under negative het conditions.

Note 2: Test 3 was conducted using Vickers 180 series Hoehnhorn 0. , 12 inches (30.5 cm) supercharging inflow conditions.

Example-XIII The hydraulic fluid of Example Pump test was performed using the same conditions as the pump. These test results are shown below It is shown in Table I.

Exam number: 1 Shigeshige Duration time hr 1080 706 Ring wear loss mgs 50 1.00 Vane wear loss Bs 8 5 Total wear loss mgs 58 105 Wear rate mgs/hr O, 0540, 15 Viscosity: Initial (SUS a 100° F) 310 240 final (SUS excitation 100°F) 183 267 international investigation report

Claims (1)

[Claims] 1. A highly aqueous oil-in-water emulsion hydraulic fluid comprising (1) about 1.5 to about 15% polyether thickener and (2) about 0.5 to about 20% lubrication. and (3) the reaction between alkenyl-succinic anhydride or succinic acid and a water-soluble active hydrogen compound. from about 0.5% to about 5.0% of the reaction product dispersant and (4) a dialkyl- or diallyl-dithiophosphate, or a dialkyl- or diallyl-dithiocarbamate. (5) about 0.125% to about 1.25% of an extreme pressure additive comprising: (5) the balance water, wherein said percentage is by weight based on the total weight of the liquid. 2. The thickener is ethylene oxide and at least one type having 3 to 4 carbon atoms. A type of lower alkylene oxide is reacted with at least one type of active hydrogen compound initiator to form a telo- or block copolymer, and this copolymer is further reacted with at least one type of active hydrogen compound initiator. polyether polyols prepared by reacting with α-olefin oxides of about 7,000 to 15,000 min. The hydraulic fluid according to claim 1, which has a molecular weight. 3. The hydraulic fluid according to claim 2, wherein the active hydrogen compound is a diol or a polyol. 4. The hydraulic fluid according to claim 2, wherein the active hydrogen compound is an aliphatic alcohol containing 4 to 30 carbon atoms. 5. The thickener is made into a hetero or is a polyable polyol made by forming a block copolymer. The copolymer is made of about 7. Even molecular weights from ’000 to 75,000 The hydraulic fluid according to claim 1. 6. The thickening agent converts ethylene oxide and propylene oxide into lower glycosylation agents. or polyol to form a block copolymer, and further this copolymerization polyether polyol obtained by reacting a polyether polyol with an alpha-olefin oxide containing 12 to 30. ．． The product according to claim 2, having a molecular weight of up to 000 Dynamic fluid. 7. The thickener is reacted with ethylene oxide, propylene oxide, and an aliphatic alkanol containing 12 to 18 aliphatic hydrocarbons to form a block copolymer, and the block copolymer is further reacted with 12 to 30 aliphatic hydrocarbons. A polyether obtained by reacting with an α-olefin oxide containing aliphatic carbon atoms of and said polyether has a molecular weight of about 7.000 to 15.000. The desired range of operation described in item 4 f) ε. 8. The hydraulic fluid according to claim 6, wherein the active hydrogen compound is ethylene glycol. 9. The lubricity modifier may include aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, mineral oils, silicone oils, synthetic hydrocarbon oils, glycerides, fatty alcohols, fatty acids, and aliphatic hydrocarbons. Condensation products with lucanolamines, phosphoric acid-modified condensation products of fatty acids and alkanolamines, ethoxylated fatty amines, glycols, polyglycols, ethoxylated vegetable oils, ethoxylated fatty amides, organic esters, triallyl phosphates, polyphenyl ethers and The hydraulic fluid of claim 1 selected from the group consisting of mixtures thereof. 10. The hydraulic fluid of claim 9, wherein said lubricity modifier comprises polybutene having a viscosity of about 4.0 O3 US at 100'F. 11. The lubricity modifier is a phosphoric acid-modified-condensed mixture of fatty acids and dialkanolamines. The hydraulic fluid according to claim 9, which is a synthetic product. 12. The lubricity modifier has a viscosity of about 10O3US at 100°F (37.8°C). 10. The hydraulic fluid according to claim 9, which is a naphthenic light lubricating oil having a high degree of strength. 13. The hydraulic fluid according to claim 9, wherein the lubricity modifier is ethylene glycol. R4, Mij The lubricity modifier is monobutyl ether of poly(oxyethylene-oxy-1,2-propylene) glycol having a molecular weight of about 1,500 to 4,000. 10. The hydraulic fluid according to claim 9, which is a hydraulic fluid. 15. The lubricity modifier is a phosphoric acid-denatured condensation product with a fatty acid and a dialkanolamine, and a poly(oxyethylene-oxy-1,2-propylene)glyco 10. The hydraulic fluid of claim 9, comprising a mixture of alcohol and monobutyl ether. 16. The hydraulic fluid of claim 9, wherein the lubricity modifier comprises a mixture of polybutene, polyglycol and fatty alcohol. 17. The hydraulic fluid of claim 9, wherein the lubricity modifier comprises a mixture of mineral oil, fatty alcohol and glycol. 18. The hydraulic fluid of claim 9, wherein the lubricity modifier comprises a mixture of fatty alcohols and glycols. 19. The succinic acid or succinic anhydride ester has an alkenyl succinic anhydride or succinic acid in which the alkenyl group contains 16 to 30 carbon atoms, and in this formula, R is hydrogen or about 8 to 25 carbon atoms. an alkyl group containing hydrogen, (C2H40)xH, or (C3H60)xH, R'' is R or R1, and and X is an integer from 2 to 50, and the reaction product has a molecular weight of about 800 to 2,000. The succinic anhydride ester is a reaction product of polyisobutenyl succinic anhydride having a molecular weight of about 1,000 and diethylethanolamine. The hydraulic fluid according to claim 19, comprising: 21. The dispersant is alkenyl-succinic anhydride or succinic acid and castor The hydraulic fluid according to claim 1, which is an ester with oil. 22. The dispersant is an ester of succinic anhydride or succinic acid and ethoxylated fatty amine. 2. The hydraulic fluid according to claim 1, which is a hydraulic fluid. 23. The dispersant has succinic anhydride or succinic acid and has the structural formula HO(Z)yOR"' HO(Z)yR" or where Z is (cz H40) or (C3Hb O) and R"' is is the reaction product of a compound with an alkyl group containing 8 to 20 carbon atoms, RIv is or 5RIII, RV is R1 or an alkyl group containing 1 to 4 carbon atoms, and y is an integer from 3 to 10 24. The extreme pressure additive has the structural formula: where RV is an alkyl group containing 4 to 16 carbon atoms, phenyl or naphthyl. X is hydrogen, amine, ammonium or substituted ammonium, sodium, potassium 2. The hydraulic fluid according to claim 1, wherein a is an integer from 1 to 2. 25. The hydraulic fluid according to claim 24, wherein the extreme pressure additive is zinc dialkyldithiophosphate. 26. The extreme pressure additive is a diaphragm in which the alkyl group contains about 4 to 10 carbon atoms. 25. The hydraulic fluid of claim 24, which is zinc rukyldithiophosphate. Y27. Hydraulic fluid according to claim 1, containing at least 80% by weight of water. 28. An emulsion-type highly aqueous hydraulic fluid with oil in water, including: Reacts with lene oxide, propylene oxide and lower glycols or polyols. by reacting the block copolymer with an alpha-olefin oxide containing from about 12 to about 18 aliphatic carbon atoms. about 2% to about 6% of a thickening agent, wherein the polyether has a molecular weight of about 12.000 to 14.0'OO; from about 1 to about 10%; and (3) polyisobutenyl succinic anhydride and diethyl anhydride. This reaction product has a molecular weight of about 1. OQ O, about 1 to about 3% dispersant and (4) a carbon source having about 4 to about 1.0 alkyl groups. (5) from about 0.5% to about 0.75% zinc sialkyl dithiophosphate containing zinc sialoxyldithiophosphate, and (5) the remainder water, where said percentage is a weight percentage of the total weight of the solution, and said solution has a minimum of 80% Hydraulic fluid containing water. 29. Concentrator for producing highly aqueous hydraulic fluid by adding water (1) about 5-20% of a polyether thickener, (2) about 5-40% of a lubricity modifier, and (3) alkenyl-succinic anhydride or succinic acid and water-soluble About 5 to about 20% of the dispersant, which is the reaction product with the active hydrogen compound, and (4) dialkyl- or di- (5) an extreme pressure additive consisting of allyldithiophosphate, or dialkyl- or diallyldithiocarbamate, and (5) the balance water; Concentrate is the weight percentage of the total weight of the liquid. 30. The thickener is formed by reacting ethylene oxide and at least one lower alkylene oxide having 3 to 4 carbon atoms with at least one active hydrogen compound initiator to form a hetero or block copolymer; Polyether obtained by reacting a copolymer with at least one α-olefin oxide 30. The concentrate of claim 29, wherein said polyol has a molecular weight of about 7,000 to 15,000. 31. The concentrate according to claim 30, wherein the active hydrogen compound is a diol or a polyol. 32. The active hydrogen compound is an aliphatic alcohol containing 4 to 30 carbon atoms. 31. The concentrate of claim 30, wherein the concentrate is 33. A polyether polyol in which the thickener is obtained by reacting a diol or polyol, ethylene oxide and at least one lower alkylene oxide having 3 to 4 carbon atoms to form a hetero or block copolymer. wherein said copolymer has a molecular weight of about 7,000 to 75,000. 1. The concentrate according to claim 29. 34. The thickener is a lower glycosylation agent for ethylene oxide and propylene oxide. or polyol to form a block copolymer, and this copolymer is further reacted with an α-olefin oxide containing 12 to 30 aliphatic carbon atoms. 31. The copolymer of claim 30, wherein the polyether polyol has a molecular weight of about 7,000 to 15,000. centrate. 35. The thickener is reacted with ethylene oxide, propylene oxide, and an aliphatic alcohol containing 12 to 18 aliphatic carbon atoms to form a block copolymer, and further the block copolymer is 33. The outlet according to claim 32, comprising a polyether obtained by reacting with an α-olefin oxide containing aliphatic carbon atoms, the polyether having a molecular weight of about 7.000 to L5.000. rate. 36. The concentrate according to claim 29, wherein the active hydrogen compound is ethylene glycol. 37. The lubricity modifier may be an aliphatic hydrocarbon, an alicyclic hydrocarbon, an aromatic hydrocarbon, a mineral oil, a silicone oil, a synthetic hydrocarbon oil, a glyceride, a fatty acid, or an alkanolamine. Condensation products of fatty acids with alkanolamines, phosphoric acid-denatured condensation products of fatty acids and alkanolamines, Xylated fatty amines, ethoxylated vegetable oils, ethoxylated fatty amides, organic esters glycol, polyglycol, 1-lylyl phosphate, and polyphenylene A concentrate according to claim 29 selected from the group consisting of To. 38. The lubricity modifier has a viscosity of about 40O3US at 100°C (37.8°C). 38. The concentrate of claim 37, comprising polybutene. 39. The lubricity modifier is a phosphoric acid-modified-condensed mixture of fatty acids and dialkanolamines. 38. The concentrate of claim 37, which is a synthetic product. 40. The concentrate of claim 29, wherein the lubricity modifier is a naphthenic light lubricant having a viscosity of about 100 US at 100°F (37,8°C). 41. The concentrate according to claim 29, wherein the lubricity modifier is ethylene glycol. 42. The lubricity modifier is monobutyl ether of poly(oxyethyl-oxy-1,2-propylene) glycol having a molecular weight of about 1,500 to 4,000. 30. The concentrate of claim 29, which is tel. 43. The lubricity modifier is a phosphoric acid-modified-condensed mixture of fatty acids and dialkanolamines. 30. A concentrate according to claim 29, comprising a mixture of a synthetic product and poly(oxyethylene-oxy-1,2-propylene) glycol monobutyl ether. 44. The concentrate of claim 29, wherein the lubricity modifier comprises a mixture of polybutene, polyglycol, and fatty alcohol. 45. The concentrate of claim 29, wherein the lubricity modifier comprises a mixture of mineral oil, fatty alcohol and glycol. 47. The succinic anhydride or succinic acid monoester has an alkenyl-succinic anhydride or succinic acid, where R is hydrogen or an alkyl group containing about 8 to 25 carbon atoms, R1 is hydrogen, CZ H40) x H or (Ca Hb O) x H, R” is R or 30. The concentrate of claim 29, wherein R1 and X are an integer from 2 to 50, and wherein the reaction product has a molecular weight of about 200 to 2,000. 48. The concentrate of claim 47, wherein the succinic anhydride ester comprises a reaction product of polyisobutenyl succinic anhydride having a molecular weight of i, ooo and diethylethanolamine. 49. The concentrate according to claim 29, wherein the dispersant is an alkenyl-succinic anhydride or an ester of succinic acid and castor oil. 50. The dispersant is an ester of succinic anhydride or succinic acid and ethoxylated fatty amine. 30. The concentrate of claim 29, which is tel. 51. The dispersant is succinic anhydride or succinic acid and has the structural formula HO(Z) y OR1! Summer HO(Z)yRlv or , where Z is (C2HaO) or (C3HbO), RI I + is an alkyl group containing 8 to 20 carbon atoms, RIv is or S RI I + , R 30. The concentrate of claim 29, wherein V is a reaction product with R1 or an alkyl group containing from 1 to 4 carbon atoms and y is an integer from 3 to 10. 52, the extreme pressure additive has the structural formula: where Rv is an alkyl group containing 4 to 16 carbon atoms, phenyl or sodium phthyl, and X is hydrogen, amine, ammonium, or substituted ammonium, potassium, lithium, calcium, magnesium, manganese or zinc, etc. 29. The concentrate according to claim 29, wherein a is an integer from 1 to 2. to. 53. The concentrate of claim 52, wherein the extreme pressure additive is zinc dialkyldithiophosphate. 54. The extreme pressure additive is a dimethyl alkyl group containing from about 4 to 10 carbon atoms. 53. The concentrate of claim 52, which is a zinc alkyl dithiophosphate. 55. The hydraulic fluid of claim 29, comprising at least 80% by weight of water. 56. A reservoir concentrator that forms a highly aqueous hydraulic fluid by adding water. (1) ethylene oxide, propylene oxide and lower glycerin The coal or polyol is reacted to form a block copolymer, and this block copolymer is further reacted with α-olefin oxide containing about 12 to about 18 aliphatic carbon atoms It consists of a polyether polyol obtained by reacting with (2) from about 10 to about 20% of a lubricity modifier; and (3) from about 10 to about 20% of a polyisobutenyl anhydrous amber. (4) a dispersant having a molecular weight of about 1,000 and (4) an alkyl group containing up to about 4 to about 10% carbon atoms; from about 2% to about 6% zinc dialkyldithiophosphate containing (5) the balance water, where said percentage is a weight percentage based on the total weight of the solution. Concentrate.