[go: up one dir, main page]

EP3380594A1 - Method for improving the air release of a lubricating oil - Google Patents

Method for improving the air release of a lubricating oil

Info

Publication number
EP3380594A1
EP3380594A1 EP16800935.5A EP16800935A EP3380594A1 EP 3380594 A1 EP3380594 A1 EP 3380594A1 EP 16800935 A EP16800935 A EP 16800935A EP 3380594 A1 EP3380594 A1 EP 3380594A1
Authority
EP
European Patent Office
Prior art keywords
lubricating oil
alkyl acrylate
additive
acrylate polymer
air release
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.)
Granted
Application number
EP16800935.5A
Other languages
German (de)
French (fr)
Other versions
EP3380594B1 (en
Inventor
Sravani GULLAPALLI
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of EP3380594A1 publication Critical patent/EP3380594A1/en
Application granted granted Critical
Publication of EP3380594B1 publication Critical patent/EP3380594B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—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
    • 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—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
    • C10M145/12—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 monocarboxylic
    • C10M145/14—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
    • 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
    • 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
    • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
    • 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
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/17—Fisher Tropsch reaction products
    • C10M2205/173—Fisher Tropsch reaction products 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
    • 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
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/18—Anti-foaming property
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/30—Anti-misting
    • 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
    • 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
    • C10N2070/00—Specific manufacturing methods for lubricant compositions

Definitions

  • the invention relates to a method for improving the air release of a lubricating oil.
  • Lubricating oils are used to protect and lubricate surfaces in contact, and may also be used to transmit power. It is known that air entrainment can reduce the efficacy of lubricating oils. Air entrainment is a phenomenon wherein air bubbles (typically having a diameter of less than 1mm) are dispersed throughout the lubricating oil. Entrained air can be distinguished from free air (a pocket of air trapped in part of the system) , from dissolved air (lubricating oils may contain between 6 and 12 percent by volume of dissolved air) and from foam (air bubbles typically greater than 1mm in diameter that congregate on the surface of the oil) . Air
  • the air entrainment properties of a lubricating oil are typically measured using the ASTM D3427 air release test. This test measures the time needed for air
  • the present inventors have sought to improve the air entrainment properties of lubricating oils .
  • the invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427, said method comprising mixing an additive into the lubricating oil using a high shear mixer; wherein the additive is an alkyl acrylate polymer.
  • Such alkyl acrylate polymers have been previously used as anti-foam additives. Air release times are typically considered to get worse with the addition of additives, especially anti-foams such as silicone oils. This is explained by Duncanson in "Properties on Foam in Lubricating Oils", pages 9-13, May 2003 Lubrication Engineering, Journal of the Society of Tribologists and Lubrication Engineers.
  • the present invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427.
  • compressed air is blown through the lubricating oil, which has been heated to a temperature of 50°C. After the air flow is stopped, the time required for the air entrained in the oil to reduce in volume to 0.2% is recorded as the air release time.
  • a desirable air release value is typically less than 3 minutes, preferably less than 60 seconds and most preferably less than 20 seconds.
  • the air release is improved as compared to air release achieved using the lubricating oil wherein the additive has not been mixed with the lubricating oil using a high shear mixer.
  • the inventors have found useful reductions in air release times when carrying out the method of the invention.
  • the lubricating oil comprises a base oil component, which may be a blend of several base oils.
  • the base oils in the base oil component may be any conventional base oils chosen from Groups I, II, III, IV or V of the API (American Petroleum Institute) base oil categories.
  • the base oil component comprises a GTL base oil, and more preferably the base oil component comprises at least 75wt% of a GTL base oil based upon the weight of the base oil component.
  • GTL base oils are synthesised by the Fischer-Tropsch method of converting natural gas to liquid fuel. They have a very low sulphur content and aromatic content compared with mineral oil base oils refined from crude oil and have a very high paraffin constituent ratio.
  • the lubricating oil suitably comprises additives.
  • the amount of additives is less than 10wt% based upon the weight of the lubricating oil, more preferably less than 5wt%, most preferably less than 2.5wt%.
  • the additives may include antioxidants, antiwear additives, demulsifiers , emulsifiers, rust and corrosion inhibitors, VI improvers and/or friction modifiers.
  • the lubricating oil has a kinematic viscosity in the range of from 5 to 220cSt at 40°C, more preferably of from 10 to 200cSt, most preferably of from 20 to lOOcSt.
  • the kinematic viscosity is suitably measured using ASTM D445 (ASTM D7042) .
  • the lubricating oil is formulated for use a hydraulic fluid.
  • Hydraulic fluids are used in many different types of hydraulic machinery and are used not only to lubricate the machinery but also to transmit pressure. Air
  • an alkyl acrylate polymer additive is mixed into the lubricating oil.
  • Suitable alkyl acrylate polymers are disclosed in, for example, US3166508.
  • the molecular weight of the polymer is suitably less than 10,000, preferably less than 7,500 and more preferably less than 5,000.
  • the alkyl acrylate polymer may be a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical.
  • the alkyl acrylate polymer may be a copolymer of at least two different alkyl acrylates in which the alkyl radical has from 1 to 18 carbon atoms and in which the average number of carbon atoms in the alkyl radicals of the copolymer molecular is at least 3 but less than 7 on a molar basis.
  • the preferred amount of alkyl acrylate polymer will be a balance between using enough to achieve the desired improvement in air release properties and avoiding unnecessary expense by using too much alkyl acrylate polymer.
  • the alkyl acrylate polymer additive is mixed into the lubricating oil using a high shear mixer.
  • high shear mixer is well-known to persons skilled in the art.
  • a rotating impeller or high-speed rotor creates flow and shear within the liquid that is mixed.
  • the rotor will turn within a stationary component known as a stator.
  • the additive is mixed into the lubricating oil at a rate of at least 400rpm. The rate is preferably at least 600rpm and more preferably at least 800rpm.
  • the mixing is for at least 10 minutes, more preferably at least 30 minutes, and most preferably at least 60 minutes.
  • Table 1 gives the amounts of each base oil (in weight % based upon the total weight of the blend) present in each blend.
  • the blends in Table 1 are all ISO 46.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

The invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427. The method comprises a step of mixing an additive into the lubricating oil.

Description

METHOD FOR IMPROVING THE AIR RELEASE OF A LUBRICATING OIL
Field of the Invention
The invention relates to a method for improving the air release of a lubricating oil.
Background of the Invention
Lubricating oils are used to protect and lubricate surfaces in contact, and may also be used to transmit power. It is known that air entrainment can reduce the efficacy of lubricating oils. Air entrainment is a phenomenon wherein air bubbles (typically having a diameter of less than 1mm) are dispersed throughout the lubricating oil. Entrained air can be distinguished from free air (a pocket of air trapped in part of the system) , from dissolved air (lubricating oils may contain between 6 and 12 percent by volume of dissolved air) and from foam (air bubbles typically greater than 1mm in diameter that congregate on the surface of the oil) . Air
entrainment can have a number of negative consequences including loss of lubricity, possible oxidation of the lubricating oil, noisy operation, lower efficiency and higher oil temperatures .
The air entrainment properties of a lubricating oil are typically measured using the ASTM D3427 air release test. This test measures the time needed for air
entrained in the oil to reduce in volume to 0.2% under the test conditions and at the specified temperature.
The present inventors have sought to improve the air entrainment properties of lubricating oils .
Summary of the Invention
Accordingly, the invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427, said method comprising mixing an additive into the lubricating oil using a high shear mixer; wherein the additive is an alkyl acrylate polymer.
Such alkyl acrylate polymers have been previously used as anti-foam additives. Air release times are typically considered to get worse with the addition of additives, especially anti-foams such as silicone oils. This is explained by Duncanson in "Properties on Foam in Lubricating Oils", pages 9-13, May 2003 Lubrication Engineering, Journal of the Society of Tribologists and Lubrication Engineers.
It is surprising that incorporating the alkyl acrylate polymer into the lubricating oil with a high shear mixer affects the air release properties of the lubricating oil. With the present invention the skilled person can use the alkyl acrylate polymer to improve the air release of a lubricating oil.
Detailed Description of the Invention
The present invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427. In the test, compressed air is blown through the lubricating oil, which has been heated to a temperature of 50°C. After the air flow is stopped, the time required for the air entrained in the oil to reduce in volume to 0.2% is recorded as the air release time. A desirable air release value is typically less than 3 minutes, preferably less than 60 seconds and most preferably less than 20 seconds.
The air release is improved as compared to air release achieved using the lubricating oil wherein the additive has not been mixed with the lubricating oil using a high shear mixer. The inventors have found useful reductions in air release times when carrying out the method of the invention. The lubricating oil comprises a base oil component, which may be a blend of several base oils. The base oils in the base oil component may be any conventional base oils chosen from Groups I, II, III, IV or V of the API (American Petroleum Institute) base oil categories.
Preferably the base oil component comprises a GTL base oil, and more preferably the base oil component comprises at least 75wt% of a GTL base oil based upon the weight of the base oil component. GTL base oils are synthesised by the Fischer-Tropsch method of converting natural gas to liquid fuel. They have a very low sulphur content and aromatic content compared with mineral oil base oils refined from crude oil and have a very high paraffin constituent ratio.
The lubricating oil suitably comprises additives.
Preferably the amount of additives is less than 10wt% based upon the weight of the lubricating oil, more preferably less than 5wt%, most preferably less than 2.5wt%. The additives may include antioxidants, antiwear additives, demulsifiers , emulsifiers, rust and corrosion inhibitors, VI improvers and/or friction modifiers.
Preferably, the lubricating oil has a kinematic viscosity in the range of from 5 to 220cSt at 40°C, more preferably of from 10 to 200cSt, most preferably of from 20 to lOOcSt. The kinematic viscosity is suitably measured using ASTM D445 (ASTM D7042) .
In a preferred embodiment of the invention, the lubricating oil is formulated for use a hydraulic fluid. Hydraulic fluids are used in many different types of hydraulic machinery and are used not only to lubricate the machinery but also to transmit pressure. Air
entrainment can be a particular issue in hydraulic systems, causing spongy or erratic operation of the hydraulics .
In the method of the invention an alkyl acrylate polymer additive is mixed into the lubricating oil.
Suitable alkyl acrylate polymers are disclosed in, for example, US3166508. The molecular weight of the polymer is suitably less than 10,000, preferably less than 7,500 and more preferably less than 5,000. In one embodiment the alkyl acrylate polymer may be a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical. In another embodiment the alkyl acrylate polymer may be a copolymer of at least two different alkyl acrylates in which the alkyl radical has from 1 to 18 carbon atoms and in which the average number of carbon atoms in the alkyl radicals of the copolymer molecular is at least 3 but less than 7 on a molar basis.
Suitably at least 0.0005wt% of alkyl acrylate polymer, based upon the weight of the lubricating oil, is mixed into the lubricating oil, preferably at least 0.001wt%. Suitably less than 0.1wt% of alkyl acrylate polymer, based upon the weight of the lubricating oil, is mixed into the lubricating oil, preferably less than 0.01wt%. The preferred amount of alkyl acrylate polymer will be a balance between using enough to achieve the desired improvement in air release properties and avoiding unnecessary expense by using too much alkyl acrylate polymer.
The alkyl acrylate polymer additive is mixed into the lubricating oil using a high shear mixer. The term "high shear mixer" is well-known to persons skilled in the art. A rotating impeller or high-speed rotor creates flow and shear within the liquid that is mixed. In some embodiments the rotor will turn within a stationary component known as a stator. Preferably the additive is mixed into the lubricating oil at a rate of at least 400rpm. The rate is preferably at least 600rpm and more preferably at least 800rpm. Preferably the mixing is for at least 10 minutes, more preferably at least 30 minutes, and most preferably at least 60 minutes.
The invention is further explained in detail below by means of examples, but the invention is in no way limited by these examples.
Examples
Seven different base oil blends were prepared using combinations of three base oils:
1) Chevron 220 R (a Group II mineral oil available from Chevron)
2) XHVI 8 (a Fischer-Tropsch derived oil available from Shell)
3) Spectrasyn 8 (a poly-alpha olefin fluid available from ExxonMobil)
Table 1 gives the amounts of each base oil (in weight % based upon the total weight of the blend) present in each blend. The blends in Table 1 are all ISO 46.
Table 1
An additive package containing extreme
pressure/antiwear additive, friction modifier, ashless rust inhibitor, emulsifier and antioxidant was added to the base oil blends to provide fully formulated
lubricating oils. The additive package was the same in each instance. Then 125 ppm of PC 3144 additive
(available from Allnex) , which is a 40% solution of a modified acrylic polymer in a hydrocarbon solvent, was added to the formulations at 40°C either at a stirring rate of 1200rpm using an overhead Caframo high shear mixer for an hour or at a stirring rate of 300rpm using a magnetic stirrer for an hour.
The air release time of the base oil blends, of the fully formulated oils and of the fully formulated oils plus PC 3144 was tested using the ASTM D3427 method. The results are given in Table 2:
Table 2
The results show that air release of the base oil blends varies. Adding the additive package can further increase the air release time. Adding the PC 3144 additive using a high shear mixer can substantially reduce the air release time (unless the air release time is already very low as was the case for Blend 3 and Blend 7) . Adding the PC 3144 additive with a magnetic stirrer does not seem to have the same effect.

Claims

C L A I M S
1. A method for improving the air release of a
lubricating oil as measured by ASTM D3427, said method comprising mixing an additive into the lubricating oil using a high shear mixer; wherein the additive is an alkyl acrylate polymer.
2. A method according to claim 1, wherein the
lubricating oil comprises a base oil component, and the base oil component comprises at least 75wt% of a GTL base oil based upon the weight of the base oil component.
3. A method according to claim 1 or claim 2, wherein the lubricating oil has a kinematic viscosity in the range of from 5 to 220cSt at 40°C.
4. A method according to any preceding claim, wherein the lubricating oil is formulated for use a hydraulic fluid.
5. A method according to any preceding claim, wherein the molecular weight of the alkyl acrylate polymer is less than 10, 000.
6. A method according to any preceding claim, wherein the alkyl acrylate polymer is a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical, or the alkyl acrylate polymer is a copolymer of at least two different alkyl acrylates in which the alkyl radical has from 1 to 18 carbon atoms and in which the average number of carbon atoms in the alkyl radicals of the copolymer molecular is at least 3 but less than 7 on a molar basis.
7. A method according to any preceding claim, wherein at least 0.0005wt% and less than 0.1wt% of alkyl acrylate polymer, based upon the weight of the lubricating oil, is mixed into the lubricating oil.
8. A method according to any preceding claim, wherein the additive is mixed into the lubricating oil at a rate of at least 400rpm.
9. A method according to any preceding claim, wherein the additive is mixed into the lubricating oil at a rate of at least 800rpm.
EP16800935.5A 2015-11-24 2016-11-22 Use of an additive for improving the air release of a lubricating oil Active EP3380594B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562259169P 2015-11-24 2015-11-24
PCT/EP2016/078463 WO2017089354A1 (en) 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil

Publications (2)

Publication Number Publication Date
EP3380594A1 true EP3380594A1 (en) 2018-10-03
EP3380594B1 EP3380594B1 (en) 2021-10-06

Family

ID=57391967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16800935.5A Active EP3380594B1 (en) 2015-11-24 2016-11-22 Use of an additive for improving the air release of a lubricating oil

Country Status (7)

Country Link
US (1) US20180371352A1 (en)
EP (1) EP3380594B1 (en)
JP (1) JP6878452B2 (en)
CN (1) CN108291170B (en)
BR (1) BR112018010644B1 (en)
RU (1) RU2731491C2 (en)
WO (1) WO2017089354A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7123057B2 (en) * 2016-09-21 2022-08-22 ザ ルブリゾル コーポレイション Polyacrylate antifoam component with improved thermal stability
US20210325360A1 (en) * 2020-04-17 2021-10-21 Exxonmobil Research And Engineering Company Methods for determining air release performance of lubricating oils
AU2021339526A1 (en) * 2020-07-08 2023-01-19 Materials Engineering and Technical Support Services Corp. Lubricating compositions comprising a non-silicone anti-foaming agent
CN114540096A (en) * 2020-11-24 2022-05-27 中国石油化工股份有限公司 Method for reducing air release value of CTL (cytotoxic T lymphocyte) base oil
US12247179B2 (en) 2022-12-14 2025-03-11 Metss Corp. Lubricating compositions comprising a non-silicone anti-foaming agent
CN120936698A (en) 2023-04-05 2025-11-11 国际壳牌研究有限公司 Lubricating oil composition

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166508A (en) * 1963-01-16 1965-01-19 Monsanto Co Hydrocarbon oils of reduced foaming properties
US4203854A (en) * 1974-02-20 1980-05-20 The Ore-Lube Corporation Stable lubricant composition containing molybdenum disulfide and method of preparing same
US4670173A (en) * 1985-12-19 1987-06-02 The Lubrizol Corporation Oil-soluble reaction products of an acylated reaction product, a polyamine, and mono-functional acid
US5766513A (en) * 1996-09-10 1998-06-16 Exxon Research And Engineering Company Antifoaming agents for lubricating oils (law455)
JP2001261919A (en) * 2000-03-17 2001-09-26 Mitsubishi Rayon Co Ltd Sliding property modifier and sliding property resin composition
US20040018250A1 (en) * 2001-07-11 2004-01-29 Ceccoli Joseph D. Methods for preparing high pressure/high shear dispersions containing waxes and other semi-solids and oils
US7060662B2 (en) * 2002-02-14 2006-06-13 Afton Chemical Corporation Antifoam agent and method for use in automatic transmission fluid applications involving high pressure pumps
US20070293408A1 (en) * 2005-03-11 2007-12-20 Chevron Corporation Hydraulic Fluid Compositions and Preparation Thereof
US7648950B2 (en) * 2005-04-22 2010-01-19 Rohmax Additives Gmbh Use of a polyalkylmethacrylate polymer
JP4982059B2 (en) * 2005-08-12 2012-07-25 出光興産株式会社 Lubricating oil composition and impregnated bearing using the same
US7910530B2 (en) * 2007-03-30 2011-03-22 Exxonmobil Research And Engineering Company Method for improving the air release rate of GTL base stock lubricants using synthetic ester, and composition
DE102007036856A1 (en) * 2007-08-06 2009-02-26 Evonik Rohmax Additives Gmbh Use of ester-group-containing polymers as antifatigue additives
CN101240212B (en) * 2008-02-29 2010-07-28 中国石油天然气股份有限公司 Combined cycle turbine lubricating oil composition
EP2352806B1 (en) * 2008-10-24 2012-08-15 Solvay Specialty Polymers Italy S.p.A. Method for forming a lubricating film
JP5826626B2 (en) * 2011-12-22 2015-12-02 昭和シェル石油株式会社 Grease composition
US9187707B2 (en) * 2013-01-18 2015-11-17 Sal A Randisi, Sr. Lubricating composition and method for preparing same
CN103937588B (en) * 2014-05-07 2016-01-20 广西大学 A digital hydraulic system working oil composition

Also Published As

Publication number Publication date
RU2731491C2 (en) 2020-09-03
RU2018122812A3 (en) 2020-03-11
JP6878452B2 (en) 2021-05-26
CN108291170B (en) 2021-03-19
JP2018535307A (en) 2018-11-29
WO2017089354A1 (en) 2017-06-01
CN108291170A (en) 2018-07-17
BR112018010644A2 (en) 2018-11-13
EP3380594B1 (en) 2021-10-06
BR112018010644B1 (en) 2021-03-30
RU2018122812A (en) 2019-12-25
US20180371352A1 (en) 2018-12-27

Similar Documents

Publication Publication Date Title
EP3380594B1 (en) Use of an additive for improving the air release of a lubricating oil
CN109689844B (en) Lubricating oil composition for automatic transmission
CN104411810A (en) Poly(meth)acrylate-based viscosity index improver, lubricant additive and lubricant composition containing viscosity index improver
US20160340601A1 (en) Lubricant composition containing organomodified siloxanes
CN103756764B (en) A kind of synthetic hydraulic fluid and preparation method thereof
WO2011009018A2 (en) Lubricant compositions containing stable boric acid suspension
JP6602366B2 (en) Alkyl-capped oil-soluble polymer viscosity index improver for automotive base oils
WO2008013754A3 (en) Lubricant compositions, their preparation and use
JP2010189639A (en) Lubricating composition
US10597600B2 (en) Lubricating oil composition
JP7190353B2 (en) Methods for improving lubricating oil release in hydraulic systems
JP5829900B2 (en) Method for improving flash point of oil or oil composition and oil-based composition with improved flash point
JP6134212B2 (en) Hydraulic fluid composition
JP7266382B2 (en) lubricating oil composition
CN107474912A (en) A kind of high viscous finger, the Industrial gear oil composition of wide temperature range and its application
EP3541908A1 (en) Lubricating oil composition
WO2014157200A1 (en) Hydraulic fluid composition
CN111040853A (en) Environment-friendly rare earth ion coated shock absorber oil composition and preparation method thereof
JP2014125527A (en) Method for improving the flash point of oil or oil composition and flash point-improved oily composition
RU2394877C2 (en) Oil for pumping assemblies
CN121057804A (en) Industrial gear oil
JP2020180284A (en) Lubricating oil composition and its manufacturing method
WO2022039105A1 (en) Lubricating oil composition, shock absorber, and method for using lubricating oil composition
WO2018108873A1 (en) Lubricant composition for industrial gearing coming into contact with food

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180517

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: C10M 145/14 20060101AFI20210708BHEP

Ipc: C10M 169/04 20060101ALI20210708BHEP

Ipc: C10M 177/00 20060101ALI20210708BHEP

Ipc: C10N 20/02 20060101ALN20210708BHEP

Ipc: C10N 20/04 20060101ALN20210708BHEP

Ipc: C10N 30/00 20060101ALN20210708BHEP

Ipc: C10N 30/18 20060101ALN20210708BHEP

Ipc: C10N 40/08 20060101ALN20210708BHEP

Ipc: C10N 70/00 20060101ALN20210708BHEP

INTG Intention to grant announced

Effective date: 20210723

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1436233

Country of ref document: AT

Kind code of ref document: T

Effective date: 20211015

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602016064675

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20211006

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1436233

Country of ref document: AT

Kind code of ref document: T

Effective date: 20211006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220106

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220206

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220207

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220106

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220107

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602016064675

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211122

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211130

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20211130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211130

26N No opposition filed

Effective date: 20220707

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20220106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211122

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220106

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20161122

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240925

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211006