US3718596A - Functional fluid compositions - Google Patents

Functional fluid compositions Download PDF

Info

Publication number
US3718596A
US3718596A US00011849A US3718596DA US3718596A US 3718596 A US3718596 A US 3718596A US 00011849 A US00011849 A US 00011849A US 3718596D A US3718596D A US 3718596DA US 3718596 A US3718596 A US 3718596A
Authority
US
United States
Prior art keywords
composition
poly
viscosity index
phosphate
fluid
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.)
Expired - Lifetime
Application number
US00011849A
Other languages
English (en)
Inventor
W Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Monsanto Co filed Critical Monsanto Co
Application granted granted Critical
Publication of US3718596A publication Critical patent/US3718596A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C10M3/00—Liquid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single liquid substances
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • 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
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/042—Epoxides
    • 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
    • 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
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • 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
    • C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
    • 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
    • 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
    • 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
    • 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
    • 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
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids

Definitions

  • ABSTRACT Phosphate ester base functional fluid compositions containing small amounts of water and a mixture of high and low molecular weight polymers of the alkyl esters of a-B unsaturated aliphatic mono-carboxylic acids as viscosity index improvers inhibit erosion of material and damage to mechanical members in a hydraulic system.
  • This invention relates to functional fluid compositions used in hydraulic power systems as lubricants and/r heating/cooling systems having an ability to inhibit and control damage to mechanical members of the system in contact with said fluid and more particularly to functional fluid compositions comprising certain phosphate ester containing a mixture of two different molecular weight viscosity index improvers which are polymers of the alkyl esters of a-fl unsaturated aliphatic monocarboxylic acids and from 0.1 to 2.0 percent by weight water.
  • One particularly undesirable condition which exists during the use of a functional fluid and which can cause damage is erosion of material.
  • One mechanism causing damage could be cavitation which can be described as a phenomenon resulting from movement of a fluid at a given pressure to a lower pressure, the lower pressure being obtained by an increase in fluid velocity at a given point or zone in the pressure system.
  • Thereduction in pressure is of such a magnitude as to cause cavitation severe enough to damage mechanical members and/or the fluid.
  • damage herein defined to include damage toa functional fluid and to mechanical members in contact with said fluid can be effectively reduced or inhibited in the phosphate ester based functional fluid systems by the incorporation of small amounts of water into a functional fluid, together with a mixture of a high molecular weight and a low molecular weight viscosity index improver.
  • the incorporation of these mixtures into phosphate ester based functional fluids improves the ability of such fluids to inhibit damage without adversely affecting the other properties of such fluids such as viscosity, oxidative and thermal stability, corrosion resistance in the presence of metal parts and the lubricating qualities of the functional fluid.
  • a viscosity index improver a mixture of (A) a higher molecular weight viscosity index improve
  • the total amount of viscosity index improver employed in the compositions of the instant invention can range from about 4 to about 20 parts per 100 parts of the total composition.
  • the ratio of high molecular weight viscosity index improver (A) to the lower molecular weight viscosity index improver (B) can be from 1 to 20 to 20 to 1. It is particularly preferred that the ratio of(A) to (B) be from about 2.5/7.5 to 7.5/2.5. It is even more preferred that the ratio of (A) to (B) be from 6 to 4 to 4 to 6.
  • the viscosity index improver a mixture of (A) a high molecular weight polymer of an alkyl ester of an alpha-beta unsaturated aliphatic monocarboxylic acid with (B) a low molecular weight polymer of an alpha-beta unsaturated aliphatic monocarboxylic acid.
  • the mixture can comprise a mixture of high and low molecular weight polymers of alkyl esters of the same or different (alpha-beta) unsaturated aliphatic monocarboxylic acid.
  • the alkyl group of the ester can be the same or different.
  • a mixture of high and low molecular weight polymeric viscosity index improvers wherein the alkyl group of the ester be different, for example, a mixture of poly(butylmethacrylate) and poly(n-hexylmethacrylate), or a mixture of poly(nonylacrylate) and poly(ethylacrylate).
  • high molecular weight polymer is meant a polymer having an average molecular weight of from 15,000 to about 40,000.
  • low molecular weight polymer is meant a polymer having an average molecular weight of from about 2,500 to about 12,000. It is by the employment of such mixtures that the startling and unexpected results are obtained with the functional fluid compositions of this invention.
  • the polymeric viscosity index improvers employed in the compositions of this invention are the polymers of alkyl esters of (alpha-beta) unsaturated monocarboxylic acids having the formula 'wherein R1 and R are eaClTiFdiViHHaTIyhydrOgen or an alkyl group containing from 1 to 10 carbon atoms and R is a C, to C alkyl group. Illustration of the alkyl groups represented by R, R and R" within their definitions as given above are for example methyl, ethyl, propyl, butyl, t-butyl. isopropyl.
  • polymers include, for example, poly(butylmethacrylates), poly(hexylmethacrylates), poly(octylacrylates), poly(dodecylacrylates) and polymers wherein the ester is a mixture of compounds obtained by esterifying the m5 unsaturated monocarboxylic acid with a mixture of monoalcohols containing from I to 32 carbon atoms.
  • Particularly suitable polymeric viscosity index improvers suitable for use in the compositions of this invention are the polyalkylmethacrylates and acrylates, and in general are those resulting from the polymerization of alkylmethacrylates or alkylacrylates in which the alkyl groups have from 1 to 24 carbon atoms and preferably from four to 24 carbon atoms.
  • the alkyl groups may be mixtures such as derived from a mixture of alcohols in which case there may be included some alkyl groups having as low as one carbon atom and as high as about 32 carbon atoms, e.g., dotriacontyl.
  • the number of carbon atoms in the alkyl group should preferably be such that the polymer is compatible with the particular fluid used.
  • the alkyl group of the methacrylate polymer usually be from about four to 10 carbon atoms.
  • the alkyl group may be a branched chain or isoalkyl, but it is preferably normal alkyl.
  • the molecular weight of the polymerized alkylmethacrylate is critical if inhibition of metal damage or erosion of material is to be obtained.
  • the preferred esters of phosphoric acid which can be employed as base stocks in the compositions of the instant invention are those wherein the groups represented by R are alkyl, alkoxyalkyl, phenyl, or alkyl-substituted phenyl.
  • the preferred base stocks are hereinafter referred to generically as phosphates and include trialkyl phosphates, tripheny and/or alkyl-substituted phenyl phosphates and mixed phenyl and/or alkyl-substituted phenyl phosphates.
  • the alkyl groups preferred are those containing from two to 12 carbon atoms with the total number of carbon atoms in the trialkyl phosphates being from 12 to 36 carbon atoms.
  • alkyl groups are for example, ethyl, propyl, isopropyl, butyl, hexyl, 2-ethylhexyl, dodecyl, decyl, and the like.
  • the alkyl-substituted phenyl groups represented by the R's in Formula I are those containing up to 16 carbon atoms and the alkyl groups contain 1 to 10 carbon atoms provided that the total number of carbon atoms in all of the alkyl groups attached to any one phenyl group be at most 10 carbon atoms.
  • alkyl-substituted phenyl groups are for example, methylphenyl, e'thylphenyl, dimethyl, propylphenyl, nonylphenyl, decylphenyl, dipentylphenyl, butylhexylphenyl, and the like.
  • the alkoxyalkyl groups are for example, those having the formula H(C,,H ,,O), C ll wherein n is an integer having a value of from 1 to 10, a is an integer having a value of from 2 to 10, and x is an integer of l to 10, preferably x is 1.
  • alkoxyalkyl groups are for example methoxyethyl, ethoxyethyl, propoxyethyl, ethoxypropyl, ethoxypentyl, propoxydecyl, nonyloxyethyl, octyloxybutyl and the like.
  • Typical examples of these phosphate esters are for example, dibutylphenyl phosphate, triphenyl phosphate, tricresyl phosphate, 'tributyl phosphate, tri-2-ethylhexyl phosphate, trioctyl phosphate, and mixtures of the above phosphates such as mixtures of tributyl phosphate and tricresyl phosphate, mixtures of isooctyl diphenyl phosphate and Z-ethylhexyl diphenyl phosphate, and mixtures of trialkyl phosphates and tricresyl phosphates and the like.
  • the particularly preferred phosphate esters are those which remain liquid at temperatures of about 30C.
  • compositions of the present invention can be prepared by methods known to those skilled in the art. For example by blending in mixing equipment, such as with lightning stirrers in stainless steelequipment, the phosphate ester and the viscosity index improver can be blended and the quantity of water added to this mixture with stirring until a uniform mixture is obtained.
  • compositions of the instant invention are useful as hydraulic fluids for aircrafts, etc.
  • the damage tests were run using mild steel specimens in about 750-l,000 cc of fluid at a fluid temperature of about 137F.
  • the metal specimen was vibrated in the fluid at kc with a yield 0.002-inch amplitude for a period of 45 minutes.
  • theviscosity index improver A was a butylmethacrylate polymer having an average molecular weight of 29,000 and viscosity indeximprover B was a hexylmethacrylate polymer having a molecular weight of 5600.
  • Control B TBP/CDP 70.4/21.6 8.0 .19 70.
  • test method as employed to determine relative damage has been found to correlate quite well to actual test runs on simulated hydraulic system test stands, such as the F airey Test Stand.
  • hydraulic system test stands for determining damage have correlated quite well with the hydraulic system of commercial aircraft where damage levels have been determined.
  • Functional fluid compositions of this invention with a viscosity index improver system comprising the mixture of high molecular weight and low molecular weight polymers with water concentrations sufficient to inhibit the control damage have been evaluated in actual hydraulic systems in test stands and commercial aircraft and have been found to effectively inhibit damage and are far superior to the neat fluids with additive amounts of water but employing only a single polymer as the viscosity index improver.
  • improved hydraulic pressure devices can be prepared in accordance with this invention which comprise in combination a fluid chamber and an actuating fluid composition in said chamber, said fluid comprising base stock compositions hereinbefore described.
  • the parts which are so lubricated include the frictional sur-. faces of the source of power, namely the pump, valves, operating pistons and cylinders, fluid motors, and in some cases, for machine tools, the ways, tables and slides.
  • the hydraulic systern may be of either the constant volume or the variable volume type of system.
  • the pumps may be of various types, including centrifugal pumps, jet pumps, turbine vane, liquid piston gas compressors, piston-type pump, more particularly the variable-stroke piston pump, the variable-discharge or variable displacement piston pump, radial-piston pump, axial-piston pump, in which a pivoted cylinder block is adjusted at various angles with the piston assembly, for example, the Vickers Axial-Piston Pump, or in which the mechanism which drives the pistons is set at an angle adjustable with the cylinder block; geartype pump, which may be spur, helical or herringbone gears, variations of internal gears, or a screw pump; or vane pumps.
  • the valves may be stop valves, reversing valves, pilot valves, throttling valves, sequence valves, relief valves, servo valves, non-return valves, poppet valves or unloading valves.
  • Fluid motors are usually constantor variable-discharge piston pumps caused to rotate by the pressure of the hydraulic fluid of the system with the power supplied by the pump power source. Such a hydraulic motor may be used in connection with a variable-discharge pump to form a variablespeed transmission. It is, therefore, especially important that the frictional parts of the fluid system which are lubricated by the functional fluid be protected from damage. Thus, damage brings about seizure of frictional parts, excessive wear and premature replacement of parts.
  • the fluid compositions of this invention when utilized as a functional fluid can also contain dyes, pour point depressants, metal deactivators, acid scavengers, such as for example, an organic compound which contains at least one epoxide group such as phenylglycidyl ether, pinene oxide, styrene oxide, glycidyl cyclohexyl ether, glycidyl epoxycyclohexyl ether, diglycidyl ether, glycidyl isopropyl ether, butadiene dioxide cyclohexylene oxide, bis-epoxycyclohexyl adipate, 3,4-epoxycyclohexylcarboylate of 3,4-epoxycyclohexane and the like, antioxidants, defoamers in concentration sufficient to impart antifoam properties, such as from about 10 to about 50,000 percent) parts per million, lubricity agents and the like.
  • epoxide group such as
  • a hydraulic fluid composition comprising by weight I. from about 80 to 96 percent of phosphate esters and mixtures thereof having the formula wherein each R is individually an alkyl or alkoxy alkyl group containing from two to 12 carbon atoms, a phenyl group or an alkyl-substituted phenyl group containing up to 16 carbon atoms wherein the alkyl substituents contain from one to carbon atoms, provided that the ratio of alkyl groups represented by R to phenyl and alkyl-substituted phenyl groups is at least 2 to 1, II.
  • a viscosity index improver consisting essentially of polymers of alkyl esters of 01-13 unsatura ted aliphatic monocarboxyllc acids, said vrscoslty index 1mprover being a mixture of a. a high molecular weight polymer wherein the molecular weight is from 15,000 to 40,000 and b. a low molecular weight polymer having a molecular weight of from 2,500 to 12,000; provided that the ratio of (a) to (b) is from 1 to 20 to 20 to l and Ill. from 0.1 to 2.0 percent by weight water.
  • composition as claimed in claim 1 wherein the viscosity index improver is a mixture of polyalkylmethacrylates, and the alkyl ester groups of (a) and (b) are different.
  • composition as claimed in claim 1 wherein the viscosity index improver is a mixture of polyalkylacrylates, and the alkyl ester groups of (a) and (b) are different.
  • composition as claimed in claim 2 wherein the phosphate ester is dibutylphenyl phosphate.
  • composition as claimed in claim 2 wherein the phosphate ester is tributyl phosphate.
  • composition as claimed in claim 2 wherein the phosphate ester is a mixture of tributyl phosphate and tricresyl phosphate.
  • composition as claimed in claim 2 wherein the phosphate ester is a mixture of a trialkyl phosphate and cresyldiphenyl phosphate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Epoxy Resins (AREA)
US00011849A 1970-02-16 1970-02-16 Functional fluid compositions Expired - Lifetime US3718596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1184970A 1970-02-16 1970-02-16

Publications (1)

Publication Number Publication Date
US3718596A true US3718596A (en) 1973-02-27

Family

ID=21752228

Family Applications (1)

Application Number Title Priority Date Filing Date
US00011849A Expired - Lifetime US3718596A (en) 1970-02-16 1970-02-16 Functional fluid compositions

Country Status (8)

Country Link
US (1) US3718596A (enrdf_load_stackoverflow)
JP (1) JPS5127633B1 (enrdf_load_stackoverflow)
BE (1) BE762976A (enrdf_load_stackoverflow)
CA (1) CA947753A (enrdf_load_stackoverflow)
DE (1) DE2107095C3 (enrdf_load_stackoverflow)
FR (1) FR2080535B1 (enrdf_load_stackoverflow)
GB (1) GB1302999A (enrdf_load_stackoverflow)
NL (1) NL145597B (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263062A (en) * 1979-08-02 1981-04-21 Stauffer Chemical Company Rust-preventive compositions
US4461713A (en) * 1983-04-01 1984-07-24 Stauffer Chemical Company Acid-resistant phosphate ester functional fluids
US5205951A (en) * 1987-06-30 1993-04-27 Chevron Research And Technology Company Phosphate ester-based functional fluids containing an epoxide and a compatible streaming potential-inhibiting metal salt
US5464551A (en) * 1992-06-11 1995-11-07 Monsanto Company Stabilized phosphate ester-based functional fluid compositions
US5490886A (en) * 1994-10-14 1996-02-13 Fmc Corporation Methods for quenching metal
EP0823472A1 (en) * 1996-08-08 1998-02-11 Rohm And Haas Company Viscosity index improving additives for phosphate ester-containing hydraulic fluids
USRE37101E1 (en) * 1992-06-11 2001-03-20 Solutia Inc. Stabilized phosphate ester-based functional fluid compositions
US6254799B1 (en) 1998-11-10 2001-07-03 Exxonmobil Research And Engineering Company Phosphate ester base stocks comprising mixed n-butyl/isobutyl phosphate esters and aircraft hydraulic fluids comprising the same
US6319423B1 (en) 1998-10-23 2001-11-20 Exxonmobil Research & Engineering Co. Phosphate ester base stocks and aircraft hydraulic fluids comprising the same
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
US6703355B2 (en) 2000-08-04 2004-03-09 Exxonmobil Research And Engineering Company Method for lubricating high pressure hydraulic system using phosphate ester hydraulic fluid
US20050023504A1 (en) * 2003-07-25 2005-02-03 Rohmax Additives Gmbh Functional fluid and the use thereof
US20060252660A1 (en) * 2005-05-09 2006-11-09 Akhilesh Duggal Hydrolytically stable viscosity index improves
CN104263480A (zh) * 2014-10-08 2015-01-07 无锡阳工机械制造有限公司 一种抗燃液压油
CN104312696A (zh) * 2014-10-08 2015-01-28 无锡阳工机械制造有限公司 一种液压油及其制备方法
CN104342229A (zh) * 2013-07-26 2015-02-11 中国石油化工股份有限公司 一种可生物降解液压油组合物
WO2017099956A1 (en) 2015-12-07 2017-06-15 Exxonmobil Research And Engineering Company Functional fluid compositions containing erosion inhibitors

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470792A (en) * 1947-08-27 1949-05-24 Schlesinger Walter Noncorrosive hydraulic fluids
US2933449A (en) * 1956-09-21 1960-04-19 Douglas Aircraft Co Inc Functional fluid and lubricant
US3218265A (en) * 1962-06-28 1965-11-16 Union Carbide Corp Monovalent bis(aromatic hydrocarbon) chromium cations as corrosion inhibitors
US3324036A (en) * 1965-05-11 1967-06-06 Union Carbide Corp Non-corrosive hydraulic fluid
US3432437A (en) * 1966-01-24 1969-03-11 Mc Donnell Douglas Corp Fire resistant hydraulic fluid and lubricant compositions
US3487020A (en) * 1966-08-30 1969-12-30 Robert L Peeler Hydraulic fluids
US3496107A (en) * 1969-03-13 1970-02-17 Fmc Corp Fire-resistant functional fluids
US3513097A (en) * 1965-12-23 1970-05-19 Monsanto Co Functional fluid compositions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907333C (de) * 1949-04-13 1954-02-11 Douglas Aircraft Co Inc Schmiermittel und hydraulische Fluessigkeiten
GB734644A (en) * 1953-07-17 1955-08-03 Shell Refining & Marketing Co Compositions suitable for use as hydraulic fluids
BE578894A (enrdf_load_stackoverflow) * 1958-05-23
GB951769A (en) * 1959-04-03 1964-03-11 Celanese Corp Organic liquid compositions

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470792A (en) * 1947-08-27 1949-05-24 Schlesinger Walter Noncorrosive hydraulic fluids
US2933449A (en) * 1956-09-21 1960-04-19 Douglas Aircraft Co Inc Functional fluid and lubricant
US3218265A (en) * 1962-06-28 1965-11-16 Union Carbide Corp Monovalent bis(aromatic hydrocarbon) chromium cations as corrosion inhibitors
US3324036A (en) * 1965-05-11 1967-06-06 Union Carbide Corp Non-corrosive hydraulic fluid
US3513097A (en) * 1965-12-23 1970-05-19 Monsanto Co Functional fluid compositions
US3432437A (en) * 1966-01-24 1969-03-11 Mc Donnell Douglas Corp Fire resistant hydraulic fluid and lubricant compositions
US3487020A (en) * 1966-08-30 1969-12-30 Robert L Peeler Hydraulic fluids
US3496107A (en) * 1969-03-13 1970-02-17 Fmc Corp Fire-resistant functional fluids

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Acrylic Ester Polymers, Luskin & Myers reprint from Encyclopedia of Polymer Science & Technology, Vol. I, pgs. 317 318. *
Cavitational Erosion & Means for its Prevention, Bogachez & Mints U.S. Clearing House, pgs. 99 103,107, & 112. *
The Electrochemical Approach to Cavitation Damage & Its Prevention Preiser et al. Corrosion, Vol. 17 (1961) pgs. 535T, 536T, 540T, & 541T. *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263062A (en) * 1979-08-02 1981-04-21 Stauffer Chemical Company Rust-preventive compositions
US4461713A (en) * 1983-04-01 1984-07-24 Stauffer Chemical Company Acid-resistant phosphate ester functional fluids
US5205951A (en) * 1987-06-30 1993-04-27 Chevron Research And Technology Company Phosphate ester-based functional fluids containing an epoxide and a compatible streaming potential-inhibiting metal salt
US5464551A (en) * 1992-06-11 1995-11-07 Monsanto Company Stabilized phosphate ester-based functional fluid compositions
USRE37101E1 (en) * 1992-06-11 2001-03-20 Solutia Inc. Stabilized phosphate ester-based functional fluid compositions
US5490886A (en) * 1994-10-14 1996-02-13 Fmc Corporation Methods for quenching metal
EP0823472A1 (en) * 1996-08-08 1998-02-11 Rohm And Haas Company Viscosity index improving additives for phosphate ester-containing hydraulic fluids
US5817606A (en) * 1996-08-08 1998-10-06 Rohm And Haas Company Viscosity index improving additives for phosphate ester-containing hydraulic fluids
US5863999A (en) * 1996-08-08 1999-01-26 Rohm And Haas Company Viscosity index improving additives for phosphate ester-containing hydraulic fluids
US6649080B2 (en) 1998-10-23 2003-11-18 Exxonmobil Research And Engineering Company Phosphate ester base stocks and aircraft hydraulic fluids comprising the same
US6319423B1 (en) 1998-10-23 2001-11-20 Exxonmobil Research & Engineering Co. Phosphate ester base stocks and aircraft hydraulic fluids comprising the same
US6254799B1 (en) 1998-11-10 2001-07-03 Exxonmobil Research And Engineering Company Phosphate ester base stocks comprising mixed n-butyl/isobutyl phosphate esters and aircraft hydraulic fluids comprising the same
US6652772B2 (en) 1998-11-10 2003-11-25 Exxonmobil Research And Engineering Company Phosphate ester base stocks comprising mixed n-butyl/isobutyl phosphate esters and aircraft hydraulic fluids comprising the same
US6703355B2 (en) 2000-08-04 2004-03-09 Exxonmobil Research And Engineering Company Method for lubricating high pressure hydraulic system using phosphate ester hydraulic fluid
US7030067B2 (en) 2001-05-10 2006-04-18 3M Innovative Properties Company Bis(perfluoroalkanesulfonyl)imides and their salts as surfactants/additives for applications having extreme environments and methods therefor
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
US20040033366A1 (en) * 2001-05-10 2004-02-19 3M Innovative Properties Company Bis(perfluoroalkanesulfonyl)imides and their salts as surfactants/additives for applications having extreme environments and methods therefor
US20050023504A1 (en) * 2003-07-25 2005-02-03 Rohmax Additives Gmbh Functional fluid and the use thereof
US7470381B2 (en) * 2003-07-25 2008-12-30 Rohmax Additives Gmbh Functional fluid and the use thereof
US20060252660A1 (en) * 2005-05-09 2006-11-09 Akhilesh Duggal Hydrolytically stable viscosity index improves
CN104342229A (zh) * 2013-07-26 2015-02-11 中国石油化工股份有限公司 一种可生物降解液压油组合物
CN104263480A (zh) * 2014-10-08 2015-01-07 无锡阳工机械制造有限公司 一种抗燃液压油
CN104312696A (zh) * 2014-10-08 2015-01-28 无锡阳工机械制造有限公司 一种液压油及其制备方法
CN104263480B (zh) * 2014-10-08 2017-02-08 李璇璇 一种抗燃液压油
WO2017099956A1 (en) 2015-12-07 2017-06-15 Exxonmobil Research And Engineering Company Functional fluid compositions containing erosion inhibitors

Also Published As

Publication number Publication date
NL145597B (nl) 1975-04-15
NL7101890A (enrdf_load_stackoverflow) 1971-08-18
FR2080535B1 (enrdf_load_stackoverflow) 1974-02-15
FR2080535A1 (enrdf_load_stackoverflow) 1971-11-19
CA947753A (en) 1974-05-21
DE2107095A1 (de) 1971-08-26
GB1302999A (enrdf_load_stackoverflow) 1973-01-10
BE762976A (fr) 1971-08-16
DE2107095C3 (de) 1982-03-25
DE2107095B2 (de) 1981-06-11
JPS5127633B1 (enrdf_load_stackoverflow) 1976-08-13

Similar Documents

Publication Publication Date Title
US3718596A (en) Functional fluid compositions
EP0823472B1 (en) Viscosity index improving additives for phosphate ester-containing hydraulic fluids
US2549270A (en) Lubricant and hydraulic fluid composition
US3180832A (en) Oil compositions containing anti-wear additives
RU2009148863A (ru) Улучшение передачи энергии в гидравлических системах
US2448567A (en) Grease compositions
US3983046A (en) Functional fluid compositions containing epoxy additives
US3629114A (en) Functional fluid compositions
US3492229A (en) Functional fluid compositions
US3791975A (en) Biodegradable lubricants
US3935116A (en) Functional fluid compositions
US3490737A (en) Functional fluid compositions
US3001942A (en) Lubricant composition
NO131462B (enrdf_load_stackoverflow)
CA1036613A (en) Monoepoxyethylenecyclohexyl compounds useful as acid scavengers
US3481872A (en) Degradation resistant and non-corrosive high-temperature lubricant formulation
US2698837A (en) Functional fluids
CA1045624A (en) Functional fluid compositions containing epoxide stabilizers
US3976585A (en) Functional fluid compositions containing epoxide stabilizers
US3429820A (en) Power steering process and lubricating composition
US3592772A (en) Functional fluids containing ammonia for preventing cavitation damage
US3502581A (en) Antioxidant composition and use thereof
US3849324A (en) Functional fluids
US3701732A (en) Functional fluid compositions
US3630916A (en) Functional fluid compositions