EP3337879B1 - Compositions de graisse de lubrification - Google Patents

Compositions de graisse de lubrification Download PDF

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Publication number
EP3337879B1
EP3337879B1 EP16754263.8A EP16754263A EP3337879B1 EP 3337879 B1 EP3337879 B1 EP 3337879B1 EP 16754263 A EP16754263 A EP 16754263A EP 3337879 B1 EP3337879 B1 EP 3337879B1
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EP
European Patent Office
Prior art keywords
grease composition
weight
composition according
lubricating
boron nitride
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.)
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Application number
EP16754263.8A
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German (de)
English (en)
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EP3337879A1 (fr
Inventor
Rachel Kling
Alexander GRECHIN
Bernard FISIC
Karl-Heinz Hensel
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.)
Setral Chemie GmbH
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Setral Chemie GmbH
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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
    • C10M105/50—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing halogen
    • C10M105/54—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing halogen containing carbon, hydrogen, halogen and oxygen
    • 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
    • C10M113/00—Lubricating compositions characterised by the thickening agent being an inorganic material
    • C10M113/10—Clays; Micas
    • 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
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
    • 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
    • C10M169/02—Mixtures of base-materials and thickeners
    • 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
    • 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
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • 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
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C10M2201/0416—Carbon; Graphite; Carbon black used as thickening agents
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C10M2201/06—Metal compounds
    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C10M2201/0616—Carbides; Hydrides; Nitrides used as thickening agents
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • C10M2201/0626—Oxides; Hydroxides; Carbonates or bicarbonates used as thickening agents
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    • C10M2201/065—Sulfides; Selenides; Tellurides
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    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/0656—Sulfides; Selenides; Tellurides used as thickening agents
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    • 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
    • C10M2201/085—Phosphorus oxides, acids or salts
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    • C10M2201/085—Phosphorus oxides, acids or salts
    • C10M2201/0856—Phosphorus oxides, acids or salts used as thickening agent
    • 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
    • C10M2201/087—Boron oxides, acids or salts
    • 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
    • C10M2201/087—Boron oxides, acids or salts
    • C10M2201/0876—Boron oxides, acids or salts used as thickening agent
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/1026—Silicates used as thickening agents
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • C10M2201/1036—Clays; Mica; Zeolites used as thickening agents
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    • C10M2201/105—Silica
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/105—Silica
    • C10M2201/1056—Silica used as thickening agents
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/1033—Polyethers, i.e. containing di- or higher polyoxyalkylene groups 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
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/04—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen
    • C10M2213/043—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen used as base material
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    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/0606—Perfluoro polymers used as base material
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    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C10M2213/0623—Polytetrafluoroethylene [PTFE] used as base material
    • C—CHEMISTRY; METALLURGY
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    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C10M2213/0626—Polytetrafluoroethylene [PTFE] used as thickening agents
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    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • C10M2229/051—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen
    • C10M2229/0515—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen used as base material
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    • C10N2010/02—Groups 1 or 11
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    • 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
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    • 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
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08—Resistance to extreme temperature
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    • C10N2030/40—Low content or no content compositions
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/36—Release agents or mold release agents
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Definitions

  • the present invention relates to lubricating grease compositions which are particularly suitable as high-temperature lubricating greases and are used for lubrications in oven systems, dryers, dishwashers, electric motors or fans.
  • Lubricating greases generally contain a thickener that is dissolved or dispersed in a base oil, with dispersants often being used for better and more stable distribution of the thickener.
  • the thickener is used to set the desired consistency, using a large number of inorganic and organic compounds.
  • PFPE Perfluorinated polyalkyl ethers
  • PFPE perfluorinated polyalkyl ethers
  • PTFE polytetrafluoroethylene
  • the EP 657 524 describes lubricating grease compositions which contain a mineral oil and / or a synthetic oil on a hydrogenated basis, a perfluorinated polyalkylether oil and, as a thickening agent, PTFE.
  • the DE 10 2004 021 812 A1 describes a lubricating grease containing a base oil, a thickening agent, in particular a polyurea, and an inorganic material such as silicon dioxide distributed in the lubricating grease.
  • the WO 2008/154997 A1 describes a lubricating grease containing a base oil, an ionic liquid, a thickener and an additive.
  • the ionic liquid is intended to increase the service life and lubricating effect of the lubricant and to adjust the viscosity and electrical conductivity.
  • the WO 2013/037456 therefore describes high-temperature greases that contain a fluorine-free base oil, a thickening agent, which can be PTFE, additives and possibly another fluorine-free oil component.
  • the EP 1589291 A1 discloses a furnace pull-out guide which has rolling elements which are arranged in a rolling element cage.
  • the rolling element cage and the rolling elements have a lubricating layer which comprises a solid lubricant, for example graphite, molybdenum sulfide, tungsten disulfide or boron nitride, and which is applied and baked in the form of a lacquer
  • the WO 2010/046456 A1 describes a pull-out guide for an oven, in which the tracks of the pull-out guide are lubricated with boron nitride and / or a lubricant containing polysiloxane.
  • the EP 648 832 A1 describes grease compositions containing a fluorinated polymer oil, boron nitride and optionally solid fluorinated polymers.
  • the lubricating grease compositions should have good lubricating properties even under harsh operating conditions.
  • the US 2008/0167208 describes lubricating grease compositions which contain a perfluoropolyether oil with a kinematic viscosity of 50-1500 mm 2 / s at 40 ° C., optionally a thickener and other customary additives.
  • the grease compositions are also said to be useful in contact with graphite or molybdenum disulfide at higher temperatures.
  • PTFE-containing lubricating greases form toxic fumes at higher temperatures and are also washed out relatively quickly by water during cleaning processes.
  • PTFE-free lubricating greases have the disadvantage that they are washed out by water even more quickly than PTFE-containing lubricating greases.
  • the present invention is therefore based on the object of providing lubricating grease compositions with improved water washability.
  • the lubricating grease compositions should have improved temperature stability and bring about a longer service life of the lubrication at high temperatures.
  • a lubricating grease composition comprising at least one highly viscous, fluorinated oil, hexagonal boron nitride and a binder.
  • the kinematic viscosity is measured with SVM 300 Viscometer, Anton Paar at a temperature of 40 ° C.
  • Component (a) is selected from perfluorinated polyalkylether oils or perfluorinated silicone oils, and mixtures thereof.
  • Suitable perfluorinated polyalkyl ether oils are, for example, in WO 97/47710 or the EP 657 524 described.
  • e / a and f / a are in the range from 20 to 50 and b / a in the range from 0.5 to 2.
  • the perfluorinated polyalkyl ether oils correspond to the formula: CF 3 - [OCF (CF 3 ) CF 2 ] f - [OCF 2 ] a - [OCF 2 CF (CF 3 )] e - OCF 3 where a, e and f are randomly distributed and stand for 0 or an integer from 1 to 200, although not all of them can stand for 0 at the same time and e / a and f / a are in the range from 20 to 50.
  • component (a) can additionally comprise a non-fluorinated oil, in particular a mineral oil.
  • the non-fluorinated oil is generally contained in an amount of 0.1 to 40% by weight, in particular 0.5 to 30% by weight, based on the amount of the fluorinated oil.
  • the lubricating grease composition further comprises boron nitride, in particular hexagonal boron nitride.
  • the grease composition comprises hexagonal alpha boron nitride.
  • the boron nitride has a BET surface area in the range from 10 to 20 m 2 / g, determined in accordance with ISO 9277: 2010.
  • the boron nitride has an average particle size D50 of 1 to 10 ⁇ m, in particular 2 to 6 ⁇ m, determined by means of laser diffractometry (Malvern Mastersizer 3000).
  • a suitable boron nitride for example, under the trade name BORONID ® from ESK Ceramics GmbH & Co. KG, Germany, available.
  • the grease composition further comprises a binder.
  • the binder generally has an average particle size D50 in the range from 1 to 10 ⁇ m, preferably from 2 to 8 ⁇ m, determined by means of laser diffractometry.
  • the binder is organically modified bentonite or a mixture of organically modified bentonite with at least one further binder selected from alkali metal phosphates, aluminum phosphates, alkali metal silicates, alkaline earth metal silicates, aluminum silicates, alkaline earth metal carbonates, silicon dioxide, titanium dioxide, aluminum oxide and mixtures thereof.
  • the further binder is contained in an amount of 0.1 to 50% by weight, in particular 0.5 to 40% by weight, based on the amount of the organically modified bentonite.
  • Organically modified pyrogenic silica is preferred as silicon dioxide and organically modified pyrogenic titanium dioxide is preferred as titanium dioxide.
  • Modified fumed silica and modified fumed titanium dioxide are products which have been surface-treated with an organosilane, in particular with an alkylsilane.
  • Corresponding products such as Aerosil R 912, Aerosil 812, Aerosil 805, Aerosil R 202, Aeroxide ® TiO 2 T 805, Aeroxide ® TiO 2 NKT 90, VP NKT 65 are commercially available, for example from Evonik Industries AG, Germany or Wacker Chemie AG, Germany.
  • Bentonite is a mixture of different clay minerals with the most important component montmorillonite (60% to 80%). Further accompanying minerals are quartz, mica, feldspar, pyrite or calcite.
  • montmorillonite Further accompanying minerals are quartz, mica, feldspar, pyrite or calcite.
  • the term "bentonite” includes all naturally occurring versions as well as modified bentonites. Bentonite is commercially available in the form of various commercial products. In the context of the present invention, organically modified, in particular hydrophobically modified, bentonite is used, for example the commercial product BARAGEL® from Elementis Specialties Inc., USA.
  • Organically hydrophobically modified bentonite can take place, for example, by reacting natural or purified bentonite with quaternary ammonium compounds in the sense of a cation exchange reaction in which, for example, alkali cations are exchanged for quaternary ammonium compounds.
  • Quaternary ammonium compounds are, for example, those of the general formula R 1 R 2 R 3 R 4 N + X - , where X is one equivalent of an anion, for example sulfate, hydrogen sulfate, alkyl sulfate, aryl sulfate, alkyl sulfonate, aryl sulfonate, halide, phosphate, carbonate, alkyl phosphate , Alkyl carbonate, nitrate, alkoxide, hydroxide, tetrafluoroborate or perchlorate, in particular halide, and R 1 , R 2 , R 3 or R 4 can be the same or different and are C 1 -C 20 -alkyl.
  • X is one equivalent of an anion, for example sulfate, hydrogen sulfate, alkyl sulfate, aryl sulfate, alkyl sulfonate, aryl sulfon
  • R 1 and R 2 can stand for C 1 -C 4 -alkyl and R 3 and R 4 , identical or different, stand for C 12 -C 20 -alkyl.
  • quaternary ammonium salts can be used in which X stands for halide, in particular chloride, R 1 and R 2 stand for methyl and R 3 and R 4 , identical or different, stand for C 16 -C 18 -alkyl.
  • the commercial product BARAGEL ⁇ is bentonite, modified with Me 2 N (C 16 -C 18 -alkyl) 2 Cl.
  • the lubricating grease composition additionally comprises water in an amount of 0.01 to 1% by weight, in particular 0.05 to 0.2% by weight, based on the total mass of the composition.
  • Water serves as an activating agent for bentonite, in particular to activate the dispersing and thickening properties of bentonite.
  • the lubricating grease composition according to the invention can contain at least one additive, in particular an additive which is customary in the field of lubricating grease compositions.
  • the additive is preferably selected from antioxidants, for example functionalized perfluoropolyalkyl ethers, as in FIG EP 1 354 932 A1 and the U.S. 5,550,277 described; Wear protection additives, for example functionalized perfluoropolyalkyl ethers, as in the WO 2016/020232 described; Corrosion inhibitors, for example sodium sebacate, functionalized perfluoropolyalkyl ethers, as in the U.S. 5,550,277 described; Dyes, for example azo dyes and solid lubricants, for example molybdenum disulfide, tungsten disulfide, tin sulfide.
  • the lubricant composition is essentially free of PTFE.
  • the grease composition is essentially free of an ionic liquid.
  • the grease composition is essentially free of graphite.
  • Essentially free means that the lubricating grease composition has less than 0.5% by weight of PTFE, less than 0.5% by weight of ionic liquid or less than 0.5% by weight of graphite, in particular 0% by weight in each case. % of these components, based on the total mass of the composition.
  • the production of the lubricating grease composition according to the invention is generally carried out by mixing the components under high shear force, for example using a rotor-stator mixer, optionally followed by homogenization, for example using a roller mill.
  • the lubricating grease compositions according to the invention are suitable for lubrication in the temperature range from -30.degree. C. to 700.degree. C., in particular +20 to 300.degree. They can therefore be used in many areas. They can be used for the lubrication of sliding guides and running wheels in furnace systems or roller and slide bearings in dryers, electric motors or fans, for the lubrication of tools, especially tools for plastic injection molding, machines and systems, especially for the food and animal feed industries.
  • Examples of applications are the lubrication of: roller and slide bearings, sliding guides, valves, joints, slides, column guides, ejectors and other sliding surfaces such as in circular conveyor systems, painting lines, calenders, kiln cars, fans, switches, Film stretching systems, extraction systems, textile machines, wood press systems, pumps, dryers, motors, tire molds, construction machinery, electrical and automotive technology, elastomer and plastics technology as well as applications in the corrugated cardboard industry, paper industry and steel industry and machines and systems, e.g. in the food and feed industry .
  • the lubricating grease composition according to the invention is preferably used for the lubrication of sliding guides and running wheels in furnace systems or roller and slide bearings in dryers, electric motors or fans.
  • the use of the lubricating grease compositions according to the invention for the lubrication of oven pull-out rails is particularly preferred.
  • the grease composition is applied by applying it to the parts to be lubricated in an amount suitable for lubrication.
  • the lubricating grease composition according to the invention is preferably applied as a paste. This form of application enables a very precise selection and coating of the application areas.
  • the grease composition can be applied in a simple manner without the grease composition being able to flow out or drip off, for example at the ends of the tracks of oven pull-out rails.
  • An optional aftertreatment after the application of the lubricating grease composition by vibratory grinding enables better distribution and adhesion of the lubricating grease on, for example, a metallic substrate.
  • the lubricant composition is preferably thixotropic, i.e. the viscosity is reduced in the event of mechanical action and the original viscosity is restored after the end of the shear stress.
  • thixotropic i.e. the viscosity is reduced in the event of mechanical action and the original viscosity is restored after the end of the shear stress.
  • the lubricating grease composition produced according to Example 1 was first subjected to a four-ball test (four-ball apparatus, ASTM D1831 / DIN 51350-4).
  • the four-ball tester welding force was determined as 4800 N and the four-ball tester wear as 0.9 mm at 150 kg / 1 min load.
  • the thermal stability at 300 ° C. was also determined for the lubricating grease composition prepared according to Example 1.
  • the evaporation rate over time was used as a measure of the thermal stability: Hours: 0 24 72 140 Evaporation rate [%]: 0 14th 26th 41
  • Example 1 Weight loss after the third wash: ⁇ 50%; Rail can be moved easily. Comparative example 1: Weight loss after the third wash: 75% Comparative example 2: Weight loss after the third wash: 50% Comparative example 3: Weight loss after the third wash: 60%
  • Comparative Example 2 containing PTFE develops toxic, vaporous decomposition products and is therefore unsuitable for use in baking ovens, despite good washing results.
  • Test parameters Cycles: 24000 Payload: 7.5kg Temperature: 250 ° C Speed .: 10 cycles / min Level: Middle level of the oven Extract: limited by 20 mm in both directions
  • Test procedure 1. Installation of the rails 2. Apply the test load in the middle of the baking sheet 3. Endurance test 24,000 cycles 4. Determination of the movement force and lowering after every 6000 cycles 5. Dishwasher cycle every 6000 cycles 6. Dismantling and examination of the rails 7. Evaluation
  • Example 1 The sample passed the test (5 washes, good running properties up to 18000 cycles, further up to 24000 cycles slightly poorer running properties).
  • Comparative example 4 The sample passed the test (5 washes, good running properties up to 18,000 cycles, further up to 24,000 poorer running properties). However, the composition develops toxic decomposition products at temperatures above 250 ° C.
  • Comparative example 5 The sample failed the test (failed after 12,000 cycles, balls jammed due to lack of grease).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)

Claims (16)

  1. Composition lubrifiante, comprenant
    (a) 50 à 96 % en poids d'au moins une huile fluorée d'une viscosité de 500 à 1500 mm2/s à 40 °C choisie parmi des huiles de polyalkyléther perfluorées, des huiles de silicone perfluorées et des mélanges de celles-ci,
    (b) 0,9 à 20 % en poids de nitrure de bore, et
    (c) 3 à 25 % en poids d'au moins un liant, ledit liant étant de la bentonite à modification organique ou un mélange de bentonite à modification organique et d'au moins un autre liant choisi parmi les phosphates de métaux alcalins, les phosphates d'aluminium, les silicates de métaux alcalins, les silicates de métaux alcalino-terreux, les silicates d'aluminium, les carbonates de métaux alcalino-terreux, le dioxyde de silicium, le dioxyde de titane, l'oxyde d'aluminium et des mélanges de ceux-ci, l'autre liant étant présent dans une quantité de 0,1 à 50 % en poids, par rapport à la quantité de bentonite à modification organique.
  2. Composition lubrifiante selon la revendication 1, dans laquelle l'huile fluorée présente une viscosité de 500 à 1100 mm2/s à 40 °C.
  3. Composition lubrifiante selon l'une des revendications précédentes, dans laquelle l'huile fluorée est choisie parmi les huiles de polyalkyléther perfluorées et des mélanges de celles-ci.
  4. Composition lubrifiante selon l'une des revendications précédentes, dans laquelle le nitrure de bore est un nitrure de bore hexagonal, notamment un nitrure de bore α hexagonal.
  5. Composition lubrifiante selon l'une des revendications précédentes, contenant moins de 0,5 % en poids de polytétrafluoroéthylène, par rapport à la masse totale de la composition.
  6. Composition lubrifiante selon l'une des revendications précédentes, contenant moins de 0,5 % en poids d'un liquide ionique, par rapport à la masse totale de la composition.
  7. Composition lubrifiante selon l'une des revendications précédentes, contenant moins de 0,5 % en poids de graphite, par rapport à la masse totale de la composition.
  8. Composition lubrifiante selon l'une des revendications précédentes, comprenant en outre au moins une huile non fluorée.
  9. Composition lubrifiante selon l'une des revendications précédentes, comprenant en outre 0,01 à 1 % en poids d'eau, par rapport au poids total de la composition.
  10. Composition lubrifiante selon l'une des revendications précédentes, comprenant en outre au moins un additif, choisi de préférence parmi les antioxydants, les agents d'amélioration de l'indice de viscosité, les agents d'abaissement du point d'écoulement, les additifs anti-usure, les agents anti-corrosion, les agents anti-rouille, les colorants et les lubrifiants solides.
  11. Composition lubrifiante selon la revendication 10, comprenant 0,05 à 5 % en poids d'au moins un additif.
  12. Utilisation d'une composition lubrifiante selon l'une des revendications 1 à 11 pour une lubrification dans une plage de température de -30 °C à 700 °C, notamment de +100 °C à 310 °C.
  13. Utilisation d'une composition lubrifiante selon l'une des revendications 1 à 11 pour la lubrification de coulisses et roues porteuses dans des systèmes de four ou de paliers à rouleaux et paliers lisses dans des séchoirs, moteurs électriques ou ventilateurs, pour la lubrification d'outils, notamment d'outils pour le moulage de plastique par injection, de machines et d'installation, notamment pour les secteurs de l'alimentation humaine et animale.
  14. Procédé de lubrification, dans lequel on applique une composition lubrifiante selon l'une des revendications 1 à 11 sur les pièces à lubrifier.
  15. Procédé de lubrification selon la revendication 14, dans lequel on applique la composition lubrifiante dans une plage de température de -30 °C à 700 °C, notamment de +100 °C à 310 °C.
  16. Procédé de lubrification selon la revendication 14 ou 15 pour la lubrification de coulisses et roues porteuses dans des systèmes de four ou de paliers à rouleaux et paliers lisses dans des séchoirs, moteurs électriques ou ventilateurs, pour la lubrification d'outils, notamment d'outils pour le moulage de plastique par injection, de machines et d'installation, notamment pour les secteurs de l'alimentation humaine et animale.
EP16754263.8A 2015-08-20 2016-08-16 Compositions de graisse de lubrification Active EP3337879B1 (fr)

Applications Claiming Priority (2)

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EP15181667 2015-08-20
PCT/EP2016/069423 WO2017029287A1 (fr) 2015-08-20 2016-08-16 Compositions lubrifiantes

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EP3337879B1 true EP3337879B1 (fr) 2021-11-17

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EP (1) EP3337879B1 (fr)
CN (1) CN108026465A (fr)
ES (1) ES2902836T3 (fr)
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CN112004918B (zh) 2018-04-26 2023-10-03 国际壳牌研究有限公司 润滑剂组合物及其作为管道涂料的用途
CN111996064A (zh) * 2020-09-23 2020-11-27 上海虎头化工有限公司 一种超高温润滑脂及其制备方法
CN112646636A (zh) * 2020-12-22 2021-04-13 刘超 一种润滑油添加剂及其制备方法

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IT1271409B (it) * 1993-09-13 1997-05-28 Dow Corning Composizioni utilizzabili come grassi a base di oli di polimeri fluorurati e nitruro di boro esagonale
DE19622906A1 (de) * 1996-06-07 1997-12-11 Klueber Lubrication Schmierfettzusammensetzungen
US20080167208A1 (en) * 2005-02-22 2008-07-10 Miyuki Hashida Lubricant
JP4926411B2 (ja) * 2005-04-08 2012-05-09 出光興産株式会社 グリース組成物
DE112009000197B4 (de) * 2008-02-01 2015-07-16 Nok Klueber Co. Ltd. Verwendung einer fluorhaltigen Diamid-Verbindung

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CN108026465A (zh) 2018-05-11
US20180245010A1 (en) 2018-08-30
WO2017029287A1 (fr) 2017-02-23
EP3337879A1 (fr) 2018-06-27
ES2902836T3 (es) 2022-03-30

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