AU2001274943A1 - Phosphate ester hydraulic fluids with improved properties - Google Patents
Phosphate ester hydraulic fluids with improved propertiesInfo
- Publication number
- AU2001274943A1 AU2001274943A1 AU2001274943A AU7494301A AU2001274943A1 AU 2001274943 A1 AU2001274943 A1 AU 2001274943A1 AU 2001274943 A AU2001274943 A AU 2001274943A AU 7494301 A AU7494301 A AU 7494301A AU 2001274943 A1 AU2001274943 A1 AU 2001274943A1
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- Australia
- Prior art keywords
- phosphate
- fluid
- base stock
- functional fluid
- total weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/74—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing phosphorus
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M133/08—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/003—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/023—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/0405—Phosphate esters used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/041—Triaryl phosphates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/042—Metal salts thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/049—Phosphite
- C10M2223/0495—Phosphite used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
- C10M2223/0603—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/08—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-nitrogen bonds
- C10M2223/083—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-nitrogen bonds used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/10—Phosphatides, e.g. lecithin, cephalin
- C10M2223/103—Phosphatides, e.g. lecithin, cephalin used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/46—Textile oils
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Description
PHOSPHATE ESTER HYDRAULIC FLUIDS WITH IMPROVED PROPERTIES
Field of Invention
This invention relates to aircraft hydraulic fluids containing phosphate ester base stocks as functional fluids and more particularly to the use of certain alkoxylated polyetheramines as additives in such functional fluids for providing improvements in properties such as density, viscosity, lubricity and hydrolytic stability.
Background of Invention
Functional fluids are used in a wide variety of applications. For example, they are used as electronic coolants, power transmission and hydraulic fluids, and refrigeration equipment fluids to mention a few. Hydraulic fluids that are to be used in aircraft applications must meet certain performance criteria among which are thermal stability, fire resistance, low susceptibility to viscosity changes over a wide range of temperatures, hydrolytic stability and good lubricity.
In currently available commercial aircraft hydraulic fluids, phosphate esters are the most commonly used base stocks of which tributyl phosphate, isopropylated triphenyl phosphates, n-butyl diphenyl phosphate, and di-n-butyl phenyl phosphate are widely used components.
In use aircraft hydraulic fluids can become contaminated by water; and, as is well known water will cause hydrolysis of phosphate esters to produce partial esters of phosphoric acid. Consequently, phosphate ester based aircraft
fluids are formulated to contain an acid scavenger to neutralize any acid or acids produced.
Aircraft components generally are exposed to a very wide temperature range. Therefore, viscosity index improvers are added to aircraft hydrauUc fluids to limit the effect of temperature on the viscosity of the fluid composition.
Other additives that are typically used in functional fluids include erosion inhibitors, rust inhibitors, and defoamers.
Although fluid formulators have been successful in developing functional fluid compositions that provide satisfactory properties for aircraft applications, there remains a need for functional fluids that display improved viscosity, lower density, good lubricity and improved hydrolytic stability.
Summary of Invention
Broadly stated, the functional fluid of the present invention comprises a major amount of an organo phosphate ester base stock; from about 0.5 to about 10 wt% of an alkoxylated polyetheramine having the formula
where R1 is a to C2 hydrocarbyl group
R2, R3 and R4 are independently selected from groups represented by
where R5 is hydrogen, methyl or ethyl;
Z is a straight or branched alkylene of from 3 to 4 carbon atoms; x is 1 to 15; and y is 1 to 15. The functional fluid also contains from about 4 to about 20 wt% based on the total weight of fluid of auxiliary additives selected from the groups consisting of antioxidants, viscosity index improvers, rust inhibitors, erosion inhibitors, acid scavengers, defoamers and mixtures thereof.
The functional fluid is particularly useful as an aircraft hydraulic fluid.
Detailed Description of Invention
The functional fluids of the present invention includes a major amount of an organic phosphate ester base stock. Typical organo phosphate ester base stocks suitable for use in the present invention include esters selected from triaryl phosphates, trialkyl phosphates, dialkyl aryl phosphates, alkyl diaryl phosphates, and alkylated triaryl phosphates that contain from 3 to 8 and preferably from 4 to 5 carbon atoms in the alkyl groups and mixtures thereof. Examples of the foregoing esters include tri-n-butyl phosphate, tri-isobutyl phosphate, n-butyl di-isobutyl phosphate, di-isobutyl n-butyl phosphate, n-butyl diphenyl phosphate, isobutyl diphenyl phosphate, di-n-butyl phenyl phosphate, di-isobutyl penyl phosphate, tri-n-pentyl phosphate, tri-isopentyl phosphate, triphenyl phosphate, isopropylated triphenyl phosphates and butylated triphenyl phosphates. Preferably, the trialkyl phosphate esters are those of tri-n-butyl phosphate, tri-isobutyl phosphate and mixtures thereof.
The amount of each type of phosphate ester in the functional fluid will vary depending upon the specific properties required for the fluid. An ester base stock for an aircraft hydraulic fluid generally will comprise:
(1) from about 10 wt% to 100 wt% and preferably from 20 wt% to 90 wt% of a trialkyl phosphate;
(2) from 0 wt% to about 15 wt% and preferably from 0 wt% to about 50 wt% of a dialkyl aryl phosphate;
(3) from 0 wt% to about 30 wt% and preferably from 0 wt% to about 10 wt% of an alkyldiaryl phosphate;
(4) from 0 wr% to about 20 wt% and preferably from 0 wt% to about 15 wt% of a triaryl phosphate.
The functional fluids of the present invention include an alkoxylated polyetheramine having the formula
where R1 is a Ci to C24 hydrocarbyl group;
R2, R3 and R4 are independently selected from groups represented by
where R5 is hydrogen, methyl or ethyl;
Z is a straight or branched chain divalent alkylene of from 3 to 4 carbon atoms;
x is 1 to 15; and y is 1 to 15; and y is 1 to 15.
With respect to R1 in the above formula suitable hydrocarbyl groups include linear or branched alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, isobutyl and the like and aryl alkyl groups such as phenyl nonyl and alkyl aryl groups such as pentyl phenyl. In the practice of the present invention R1 preferably is a branched alkyl group of from about 6 to 21 carbon atoms.
Also in the present invention it is preferred that x is in the range of 8 to 15 and y in the range of 1 to 2.
The alkoxylated polyether amines are added to the phosphate ester base stock in amounts ranging from about 0.5 to about 10 wt% based on the total weight of fluid.
Surprisingly, it has been found that the inclusion of alkoxylated polyetheramines in phosphate ester base stocks provides for improved fluid properties such as enhanced low temperature viscosity, hydrolytic stability, lubricity and the like.
In addition to containing the major amount of a phosphate ester base stock and the alkoxylated polyetheramines, the functional fluids of the present invention also include from about 4 wt% to about 20 wt% of auxiliary additives selected from the group consisting essentially of antioxidants, acid scavengers, viscosity index (VI) improvers, rust inhibitors, erosion inhibitors and defoamers.
Useful antioxidants include trialkylphenols, polyphenols and di (alkyl phenyl) amines. These include bis (3,5 - di-tert-butyl-4-hydroxylphenyl)
methane and l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxyphenyl) benzene sold under the trade names Hitec®4702 and Ethanox®330, respectively by Ethyl Corporation. Other examples of antioxidants include tetrakis (methylene [3,5-di-tert-butyl-4-hydrocinnamate) methane sold under the trade name Irganox®1010 by Ciba-Geigy and di (n-octylphenyl) amine sold under the trade name Vanlube®81 by Vanderbilt. Typically the antioxidant will be used in the range of from about 0.1 wt% to about 2 wt% based on the total weight of the fluid.
Suitable acid scavengers include epoxy compounds such as expoxy- cyclohexane alkyl carboxylates, an example of which is 3.4-epoxycyclohexane- 2-ethylhexyl carboxylate described in U.S. Patent 3,723,320. Typically the acid scavenger will be used in an amount ranging from about 1 to about 10 wt% based on the total weight of the functional fluid.
Erosion inhibitors that are suitable for use in the compositions of the present invention include alkali metal salts of perfluoroalkyl sulfonic acids such as potassium perfluorooctyl sulfonate sold under the trade name FC®98 and available from 3M Company. Typically the erosion inhibitor will be present in an amount ranging from about 0.01 wt% to about 0.1 wt% based on the total weight of the functional fluid.
Suitable VI improver additives include polyacrylate esters having a number average molecular weight in the range of about 50,000 to 100,000. Such poly alkyl methacrylates sold as PA®-7570, PA®-6703, PA®-6744, and PA®-6961-PMN by Rhom and Haas Company. Typically the VI improver will be used in an amount ranging from about 3 wt% to about 10 wt% based on the total weight of the functional fluid.
The functional fluids described herein optionally contain further conventional additions such as metal corrosion inhibitors, anti-foaming agents, dyes, etc.
Examples
Unless otherwise stated all percents recited in the examples are percents by weight.
Example 1
Formulation 1, a formulation of this invention, was prepared by blending the following components:
Component Amount wt%
Base Stock
Tributyl Phosphate 80.0836
Ethoxylated polyether ι amine(1) 7.0
Auxiliary Additives
Antioxidants 1.5
VI Improvers 5.625
Acid scavenger 5.7
Other Additives
Corrosion Inhibitors 0.01
Dye 0.0014
Defoamer 0.01
Erosion Inhibitor 0.07
(1) This amine had the formula
Comparative Example 1
A formulation, Formulation 2, was prepared without any alkoxylated polyether amine but with the same auxiliary additives in the same amounts as Formulation 1 and with a base stock comprising a mixture of 74.9336 wt% tributylphosphate and 12.1 wt% of isopropylated triphenyl phosphates.
Comparative Example 2
A formulation, Formulation 3, was prepared using as the base stock 32.3586 wt% tributyl phosphate, 35.7 wt% tri-isobutyl phosphate and 12.1 wt% isopropylated triphenyl phosphates. Formulation 3 did not contain any alkoxylated polyether amine but did contain the same auxiliary additives in the same amounts as Formulation 1 and substantially the same additional additives as Formulation 1.
Example 2
This example shows that the addition of the alkoxylated polyether amine to the phosphate ester base stock (Formulation 1) provides desirable low viscosity at -65°F and low density when compared to Formulations 2 and 3. See Table 1.
TABLE 1
Example 3
This example demonstrates that the addition of the alkoxylated polyether amine to the phosphate ester base stock (Formulation 1) has a higher titratable acid receptor than Formulation 2 and 3. See Table 2.
TABLE 2
Example 4
The hydrolytic stability of Formulation 1 and Formulation 2 was determined by heating each at 280°F with 0.8 wt% water and periodically determining the percent titratable acid receptor. The results show that Formulation 1 provides superior hydrolytic stability compared with Formulation 2 and 3. See Table 3.
TABLE 3
Example 5
The lubricity performance of Formulation 1 and Formulation 3 was evaluated by the Four Ball Wear Test (ASTM D-4172) using aircraft manufacturer specifications (167°F, 600 RPM, 1 hour). A 40 kg load was used and the test was performed in duplicate. The results are given in Table 4.
TABLE 4
This example shows that the addition of the alkoxylated polyether amine to the phosphate ester base stock (Formulation 1) provides unexpected good lubricity performance.
Claims (10)
1. A functional fluid comprising:
(a) a major amount of an organo phosphate ester base stock;
(b) from about 0.5 to 10 wt% based on the total weight of the fluid of an alkoxylated polyether amine having the formula
where R1 is a to C24 hydrocarbyl group
R , R and R are independently selected from groups represented by
where R5 is hydrogen, methyl or ethyl;
Z is a straight or branched alkylene of from 3 to 4 carbon atoms; x is 1 to 15; and y is 1 to 15; and
(c) from about 4 to about 20 wt%, based on the total weight of the fluid, of auxiUary additives selected from the group consisting of antioxidants, viscosity index improvers, erosion inhibitors, acid scavengers and mixtures thereof.
2. The functional fluid of claim 1 wherein the organo phosphate ester base stock comprises: (i) from about 10 wt% to 100 wt% of a trialkylphosphate;
(ii) from 0 wt% to about 75 wt% of a dialkyl aryl phosphate;
(iu) from 0 wt% to about 30 wt% of an alkyl diaryl phosphate;
(iv) from 0 wt% to about 15 wt% of a triaryl phosphate.
3. The functional fluid of claim 2 wherein the alkyl groups of the esters have 4 to 5 carbon atoms.
4. The functional fluid of claim 3 wherein x is from 8 to 12.
5. The functional fluid of claim 4 wherein y is 1.
6. The functional fluid of claim 4 wherem R is and R5 is ethyl.
7. The functional fluid of claim 6 wherein R and R are and R5 is hydrogen.
8. A hydrauUc fluid comprising
(a) a major amount of an organo phosphate extra base stock comprising:
(i) from about 10 wt% to 100 wt% of a trialkylphosphate; (ii) from 0 wt% to about 75 wr% of a dialkyl aryl phosphate; (iii) from 0 wt% to about 30 wt% of an alkyl diaryl phosphate; (iv) from 0 wt% to about 15 wt% of a triaryl phosphate.
(b) from about 05 to 10 wt% based on the total weight of the fluid of an alkoxylated polyether amine having the formula where R1 is a Ci to C24 hydrocarbyl group
R2, R3 and R4 are independently selected from groups represented by
R5
— (CH2— CH)—
where R5 is hydrogen, methyl or ethyl;
Z is a straight or branched alkylene of from 3 to 4 carbon atoms; x is 1 to 15; and y is 1 to 15; and
(c) from about 4 to about 20 wt%, based on the total weight of the fluid, of auxiliary additives selected from the group consisting of antioxidants, viscosity index improvers, erosion inhibitors, acid scavengers and mixtures thereof.
9. The fluid of claim 8 wherein the base stock comprises 100 wt% of a trialkyl phosphate having 4 to 5 carbons in the alkyl group.
10. The fluid of claim 9 wherein the basestock is tributyl phosphate; an in the formula, x is from 8 to 10, y is 1, R is
and R is ethyl; and R 3 a_nd R are
R-
-(CH2— CH)- and R is hydrogen.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/512,871 US6391225B1 (en) | 2000-02-25 | 2000-02-25 | Phosphate ester hydraulic fluids with improved properties (law935) |
US09512871 | 2000-02-25 | ||
PCT/US2001/016887 WO2001062879A2 (en) | 2000-02-25 | 2001-02-02 | Phosphate ester hydraulic fluids with improved properties |
Publications (1)
Publication Number | Publication Date |
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AU2001274943A1 true AU2001274943A1 (en) | 2001-09-03 |
Family
ID=24040952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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AU2001274943A Abandoned AU2001274943A1 (en) | 2000-02-25 | 2001-02-02 | Phosphate ester hydraulic fluids with improved properties |
Country Status (6)
Country | Link |
---|---|
US (1) | US6391225B1 (en) |
EP (1) | EP1261675A2 (en) |
JP (1) | JP2003524062A (en) |
AU (1) | AU2001274943A1 (en) |
CA (1) | CA2398636A1 (en) |
WO (1) | WO2001062879A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112226265A (en) * | 2020-10-23 | 2021-01-15 | 中国石油化工股份有限公司 | Phosphate hydraulic fluid composition and preparation method thereof |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002012777A2 (en) * | 2000-08-04 | 2002-02-14 | Exxonmobil Research And Engineering Company | Method for lubricating high pressure hydraulic system using phosphate ester hydraulic fluid |
US6599866B2 (en) * | 2001-04-20 | 2003-07-29 | Exxonmobil Research And Engineering Company | Servo valve erosion inhibited aircraft hydraulic fluids |
US6555510B2 (en) * | 2001-05-10 | 2003-04-29 | 3M Innovative Properties Company | Bis(perfluoroalkanesulfonyl)imides and their salts as surfactants/additives for applications having extreme environments and methods therefor |
WO2004041978A1 (en) * | 2002-11-04 | 2004-05-21 | Solutia Inc. | Functional fluid compositions containing erosion inhibitors |
CN108219911B (en) * | 2016-12-14 | 2021-08-03 | 中国石油天然气股份有限公司 | Fully synthetic concentrated solution for hydraulic support and preparation method thereof |
WO2018108869A1 (en) | 2016-12-14 | 2018-06-21 | Evonik Oil Additives Gmbh | Use of polyesters as viscosity index improvers for aircraft hydraulic fluids |
US10113131B2 (en) * | 2017-01-11 | 2018-10-30 | The Boeing Company | Phosphono paraffins |
JP6651664B1 (en) * | 2019-03-25 | 2020-02-19 | 三菱重工サーマルシステムズ株式会社 | Method for producing lubricating composition, lubricating composition produced thereby, and compressor and refrigeration system using the same |
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US3456012A (en) | 1965-10-22 | 1969-07-15 | Cargill Inc | Polyoxyolefin adducts of gamma-alkoxypropylamines |
US4007123A (en) | 1972-02-28 | 1977-02-08 | Mcdonnell Douglas Corporation | Fire resistant functional fluid compositions |
US3951837A (en) | 1973-09-24 | 1976-04-20 | Mcdonnell Douglas Corporation | Functional fluid compositions |
DE2945094A1 (en) | 1979-11-08 | 1981-05-21 | Hoechst Ag, 6000 Frankfurt | HYDRAULIC LIQUID WITH IMPROVED PROPERTIES |
US4486324A (en) | 1981-11-06 | 1984-12-04 | Edwin Cooper, Inc. | Hydraulic fluids |
US5320768A (en) | 1988-06-24 | 1994-06-14 | Exxon Chemical Patents Inc. | Hydroxy ether amine friction modifier for use in power transmission fluids and anti-wear additives for use in combination therewith |
US5264006A (en) | 1990-03-20 | 1993-11-23 | Exxon Research And Engineering Co. | Guerbet alkyl ether mono amines |
US5094667A (en) | 1990-03-20 | 1992-03-10 | Exxon Research And Engineering Company | Guerbet alkyl ether mono amines |
KR0161554B1 (en) | 1992-06-11 | 1999-01-15 | 제임스 클리프튼 보올딩 | Stabilized phosphate ester-based functional fluid compositions |
JP3175893B2 (en) | 1994-03-25 | 2001-06-11 | 日石三菱株式会社 | Hydraulic oil composition for shock absorber |
EP0871690A1 (en) | 1994-12-09 | 1998-10-21 | Chevron U.S.A. Inc. | Hydraulic fluids for use in aircraft |
US5817606A (en) | 1996-08-08 | 1998-10-06 | Rohm And Haas Company | Viscosity index improving additives for phosphate ester-containing hydraulic fluids |
-
2000
- 2000-02-25 US US09/512,871 patent/US6391225B1/en not_active Expired - Lifetime
-
2001
- 2001-02-02 WO PCT/US2001/016887 patent/WO2001062879A2/en not_active Application Discontinuation
- 2001-02-02 AU AU2001274943A patent/AU2001274943A1/en not_active Abandoned
- 2001-02-02 CA CA002398636A patent/CA2398636A1/en not_active Abandoned
- 2001-02-02 EP EP01941605A patent/EP1261675A2/en not_active Withdrawn
- 2001-02-02 JP JP2001562654A patent/JP2003524062A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112226265A (en) * | 2020-10-23 | 2021-01-15 | 中国石油化工股份有限公司 | Phosphate hydraulic fluid composition and preparation method thereof |
Also Published As
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JP2003524062A (en) | 2003-08-12 |
EP1261675A2 (en) | 2002-12-04 |
WO2001062879A3 (en) | 2002-07-04 |
US6391225B1 (en) | 2002-05-21 |
WO2001062879A2 (en) | 2001-08-30 |
CA2398636A1 (en) | 2001-08-30 |
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