EP4073213A1 - Use of a lubricating grease composition having a high upper use temperature - Google Patents

Use of a lubricating grease composition having a high upper use temperature

Info

Publication number
EP4073213A1
EP4073213A1 EP20800639.5A EP20800639A EP4073213A1 EP 4073213 A1 EP4073213 A1 EP 4073213A1 EP 20800639 A EP20800639 A EP 20800639A EP 4073213 A1 EP4073213 A1 EP 4073213A1
Authority
EP
European Patent Office
Prior art keywords
weight
grease composition
lubricating grease
aluminum
use according
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.)
Pending
Application number
EP20800639.5A
Other languages
German (de)
French (fr)
Inventor
Christof Schmitz
Wolfgang TIEPERMANN
Raphaela MAKRUTZKI
Stefan Seemeyer
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.)
Klueber Lubrication Muenchen GmbH and Co KG
Original Assignee
Klueber Lubrication Muenchen SE and Co KG
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 Klueber Lubrication Muenchen SE and Co KG filed Critical Klueber Lubrication Muenchen SE and Co KG
Publication of EP4073213A1 publication Critical patent/EP4073213A1/en
Pending 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
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/24—Lubricating compositions characterised by the thickener being a macromolecular compound containing nitrogen
    • 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
    • C10M169/06—Mixtures of thickeners 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/08—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to a carbon atom of a six-membered aromatic ring
    • 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
    • C10M123/00—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential
    • C10M123/04—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential at least one of them being a macromolecular compound
    • 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
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
    • C10M2207/1225—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/141—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings monocarboxylic
    • C10M2207/1415—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings monocarboxylic 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/284—Esters of aromatic monocarboxylic 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening 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
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/045—Polyureas; Polyurethanes
    • C10M2217/0456—Polyureas; Polyurethanes used as thickening agents
    • 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
    • C10N2040/06—Instruments or other precision apparatus, e.g. damping 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/17—Electric or magnetic purposes for electric contacts
    • 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
    • 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 the use of a grease composition for lubricating surfaces in applications where a high upper service temperature is necessary and in particular in the automotive industry.
  • lubricating greases were mainly used for purely metallic components.
  • plastic-containing components are increasingly being used.
  • An essential area of application for the lubrication of plastic surfaces is the lubrication of friction partners in actuators.
  • Friction partners containing plastic place different demands on lubricating greases than purely metallic components, so that the lubricating greases usually used there generally do not offer satisfactory results, for example with regard to the coefficient of friction or durability.
  • the properties of the lubricating greases can be adjusted, among other things, by suitable selection of the thickener.
  • Aluminum complex soaps have proven to be suitable as thickeners for certain applications.
  • Aluminum complex soaps have long been known as thickeners for lubricating grease compositions and are described in many literature references, for example in J.
  • Another advantage of aluminum complex soaps is that they are able to reduce the dynamic viscosity of the lubricant due to their high shear instability. As a result, they enable the use of base oils with higher viscosities, which is particularly advantageous in the case of metal / plastic friction partners. Because of the higher lubricant film obtained between the friction partners as a result, wear can be reduced over the service life. In addition, an increased base oil viscosity is advantageous for the Noise Vibration Harshness (NVH) behavior in the component.
  • NSH Noise Vibration Harshness
  • the grease composition contains a base oil selected from at least one of a synthetic hydrocarbon oil, a synthetic ester-based oil and a synthetic ether-based oil, and a thickener selected from at least a lithium-based soap, a lithium-based complex soap and a urea-based compound.
  • a lubricating grease composition based on an aluminum complex thickener which is suitable for lubricating the surfaces of friction partners containing plastic or of a combination of metallic and plastic friction partners and which has a satisfactory temperature stability in the form of an upper use temperature of preferably above 90 ° C and in particular above 120 ° C.
  • a lubricating grease composition containing a base oil, a thickening agent comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components in applications in which an upper service temperature of the lubricating grease composition of at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C is necessary.
  • a thickening agent comprising an aluminum-based complex soap in combination with a polyurea thickener enables a lubricating grease composition to be obtained which is outstandingly suitable for lubricating the surfaces of components in applications in which the lubricating grease composition has a high upper service temperature necessary is.
  • the lubricating grease composition is therefore outstandingly suitable for applications in the automotive sector, since the use temperatures required in the automotive sector, which are usually in the range from -40 ° C. to + 120 ° C., can be achieved without any problems.
  • Examples of applications in which an upper service temperature of the lubricating grease composition of at least 90 ° C is required are the lubrication of ball joints, spur gears, worm and planetary gears and actuators of brushed or brushless DC motors (DC, BLDC motors) and / or AC motors (AC, BLAC motors).
  • the lubricating grease composition used according to the invention preferably has an upper use temperature of at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C.
  • An upper use temperature of the lubricating grease composition is to be understood as the highest temperature at which the Lubricating grease composition can be used without losing its serviceability.
  • the upper service temperature can be determined by measuring the oil separation at different temperatures.
  • the upper use temperature of the lubricating grease composition is the highest temperature at which the lubricating grease composition has an oil separation according to ASTM D 6184-17 (24h / X ° C.) of less than 12% by weight.
  • the lubricating grease composition preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C.) of less than 12% by weight, more preferably of less than 10% by weight and in particular less than 6% by weight.
  • the lubricating grease composition also preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C., then 24h / 110 ° C.) of less than 16% by weight, more preferably less than 14% by weight and in particular less than 13% by weight. % on.
  • the lubricating grease composition also preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C, then 24h / 110 ° C, then 24h / 120 ° C) of less than 20% by weight, more preferably less than 15% by weight. and in particular less than 12% by weight.
  • the lubricating grease composition has a service temperature range from -60 ° C to + 180 ° C and / or from -50 ° C to + 160 ° C, and / or from -40 ° C to + 150 ° C and / or from -40 ° C to + 140 ° C and or from -40 ° C to + 120 ° C.
  • a service temperature range of the lubricating grease composition is to be understood as meaning the temperature range in which the lubricating grease composition can be used without losing its usability.
  • a lubricating grease composition has an oil separation according to ASTM D 6184-17 (24h / X ° C.) of less than at its temperature of use 12% by weight.
  • a lubricating grease composition has a flow pressure (DIN 51805-2: 2016-09) of less than or equal to 1400 mbar at its service temperature.
  • the lubricating grease composition can also be used at temperatures which are higher or lower than the temperatures mentioned above, provided that these temperatures only occur for a short period of time, for example less than 10 minutes.
  • Another object of the invention is the use of a lubricating grease composition containing a base oil, a thickener comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components at temperatures that are at least temporarily at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C.
  • the temperature is maintained for a period of at least 10 minutes, more preferably at least 20 minutes, even more preferably at least 40 minutes and in particular at least 60 minutes.
  • the high temperature stability of the grease composition was surprising insofar as the use of complex soaps based on As explained above, aluminum is known to lead to lubricating greases with a rather low temperature stability of usually below 90 ° C. Without committing to a specific mechanism, it is assumed that a synergism develops between the aluminum complex side and the polyurea thickener, which increases the temperature stability of the aluminum complex side. This is probably due to the fact that both thickener components can be mixed well with one another, thus creating a hybrid thickener system. The significantly higher upper usage temperature of the polyurea thickener has a positive effect on the upper usage temperature of the aluminum-based complex soap without negatively affecting the general positive properties of the aluminum-based complex soap.
  • a polyurea thickener is understood to mean a reaction product of a diisocyanate, preferably 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4'-diisocyanatodiphenylmethane, 2,4'-diisocyanatophenylmethane, 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanatodiphenyl '-Diisocyanato-3-3'-dimethylphenyl, 4,4'-diisocyanato-3,3'-dimethylphenylmethane, which can be used individually or in combination, with an amine of the general formula R'2-NR, or a diamine of general formula R'2-NR-NR'2, where R is an aryl, alkyl or alkylene radical having 2 to 22 carbon atoms and R ', identically or differently, is a hydrogen, an alkyl
  • the proportion of the polyurea thickener in the lubricating grease composition according to the invention is preferably 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight, and in particular from 3% by weight to 9% by weight, in each case based on the Total weight of the grease composition.
  • the most varied of complex soaps based on aluminum, usually used in lubricating grease compositions can be used.
  • aluminum-based complex soaps are
  • Formula 1 General structure Aluminum complex soap preferred due to its good availability.
  • the radicals R derived from fatty acids selected from the group consisting of lauric acid, palmitic acid, myristic acid, stearic acid and mixtures thereof are also preferred.
  • Aluminum-based complex soaps as shown in Formula 1 are aluminum carboxylate compounds that can be produced by a reaction of a fatty acid, an aromatic carboxylic acid and an aluminum alcohol derivative.
  • Commercially used aluminum alcoholates are aluminum isopropoxylate or trioxyaluminum triisopropoxide.
  • a simple way of producing the aforementioned complex soaps based on aluminum involves the reaction between a trioxyaluminum triisopropoxide (Al trimer for short), a fatty acid and benzoic acid:
  • an intermediate stage such as polyoxyaluminum stearate can also be converted into the corresponding complex soap. This eliminates the need to release a low molecular weight alcohol such as isopropyl alcohol in fat production.
  • the advantage of using the complex soaps based on aluminum as thickeners is that they combine good availability with a low price.
  • aluminum complex soaps have good water resistance, pumpability, good low-temperature behavior and high material compatibility.
  • the proportion of the complex soap based on aluminum in the lubricating grease composition according to the invention is preferably from 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight and in particular from 3% by weight to 9% by weight, in each case based on based on the total weight of the grease composition.
  • the proportion of complex soap based on aluminum and polyurea thickener taken together is from 2% by weight to 22% by weight, more preferably from 4% by weight to 20% by weight and in particular from 6% by weight to 18% by weight. %, each based on the total weight of the lubricating grease composition.
  • a preferred embodiment of the invention comprises the use of the lubricating grease composition for lubricating the surfaces of plastic-containing friction partners or of a combination of metallic and plastic-containing friction partners and in particular of friction partners of the aforementioned type in actuators, in particular in the automotive sector.
  • Common lubricating oils which are liquid at room temperature (20 ° C) are suitable as base oils.
  • the base oil preferably has a kinematic viscosity of 18 mm 2 / s to 20,000 mm 2 / s, in particular from 30 mm 2 / s to 400 mm 2 / s at 40 ° C.
  • a base oil includes the base fluids commonly used for the production of lubricants, in particular oils that belong to groups I, II, II +, III, IV or V according to the classification of the American Petroleum Institute (API)
  • API Group I are mineral oils that are e.g. B. consist of naphthenic or paraffinic oils. If these mineral oils are chemically modified compared to API Group I oils, low in aromatic compounds, low in sulfur and have a low proportion of saturated compounds and thus an improved viscosity / temperature behavior, the oils are classified according to API Group II and III. API Group III also includes so-called gas-to-liquid oils, which are not produced from the refining of crude oil, but through the chemical conversion of natural gas.
  • Synthetic oils that may be mentioned are polyethers, esters, polyesters, preferably polyalphaolefins, in particular metallocenes, polyalphaolefins, polyethers, perfluoropolyalkyl ethers (PFPAE), alkylated naphthalenes, silicone oils and alkyl aromatics and mixtures thereof.
  • the polyether compound can have free hydroxyl groups, but it can also be completely etherified or end groups esterified and / or composed of a starter compound with one or more Hydroxy and / or carboxyl groups (-COOH) be produced.
  • Polyphenyl ethers, optionally alkylated are also possible as sole components or, even better, as mixed components.
  • Silicone oils, native oils and derivatives of native oils are also suitable.
  • Base oils which are particularly preferred according to the invention are polyalphaolefins, in particular metallocene polyalphaolefins, and naphthenic mineral oils according to the API Group I.
  • the proportion of the base oil in the lubricating grease composition according to the invention is from 55% by weight to 98% by weight, more preferably from 60% by weight to 95% by weight, and in particular from 68% by weight to 92% by weight. %, each based on the total weight of the lubricating grease composition.
  • the composition according to the invention can also contain further additives, for example antioxidants, corrosion inhibitors, lubricity improvers, extreme pressure and wear protection additives, metal deactivators, viscosity and adhesion improvers, dyes, friction reducers.
  • antioxidants can reduce or even prevent the oxidation of the lubricating grease composition according to the invention, in particular when it is used. In the event of oxidation, undesirable free radicals can arise and, as a result, more decomposition reactions of the lubricant occur.
  • the addition of antioxidants stabilizes the grease composition.
  • Antioxidants particularly suitable according to the invention are the following compounds: styrenated diphenylamines, diaromatic amines, phenolic resins, thiophenolic resins, phosphites, butylated hydroxytoluene, butylated hydroxyanisole, phenyl-alpha-naphthylamine, phenyl-beta-naphthylamine, octylated / butylated diphenylamine, di-tocopherol di-tert-butyl-phenyl, benzene propanoic acid, sulfur-containing phenolic compounds and mixtures of these components.
  • the lubricating grease composition can contain further additives, in particular corrosion protection additives, metal deactivators or ion complexing agents.
  • corrosion protection additives include triazoles, imidazolines, N-methylglycine (sarcosine), benzotriazole derivatives, N, N-bis (2-ethylhexyl) -ar-methyl-1H-benzotriazole-1-methanamine; n-Methyl-N (1 -oxo-9-octadecenyl) glycine, mixtures of phosphoric acid and mono- and diisooctyl esters reacted with (C11-14) -alkylamines, mixtures of phosphoric acid and mono- and diisooctyl esters reacted with tert-alkylamine and primary ( Ci2-14) amines, dodecanoic acid, triphenyl phosphorothionate and amine phosphates.
  • Commercially available additives are the following:
  • anti-wear additives are amines, amine phosphates, phosphates, thiophosphates, phosphorothionates and mixtures of these Components.
  • the commercially available anti-wear additives include IRGALUBE ® TPPT, IRGALUBE ® 232, IRGALUBE ® 349,
  • the proportion of the further additives is preferably from 1% by weight to 30% by weight, even more preferably from 1.5% by weight to 25% by weight, and in particular from 2% by weight to 20% by weight, in each case based on the Total weight of the grease composition.
  • the grease composition can contain solid lubricants such as PTFE, boron nitride, polymer powder such as PTFE, polyamides or polyimides, pyrophosphate, metal oxides such as zinc oxide or magnesium oxide, metal sulfides such as zinc sulfide, molybdenum sulfide, tungsten sulfide or tin sulfide,
  • solid lubricants such as PTFE, boron nitride, polymer powder such as PTFE, polyamides or polyimides, pyrophosphate, metal oxides such as zinc oxide or magnesium oxide, metal sulfides such as zinc sulfide, molybdenum sulfide, tungsten sulfide or tin sulfide,
  • the proportion of solid lubricants is preferably from 1% by weight to 30% by weight, more preferably from 1.5% by weight to 25% by weight, and in particular from 2% by weight to 20% by weight, based in each case on the total weight of the Grease composition.
  • the lubricating grease composition more preferably has a worked penetration, determined in accordance with DIN ISO 2137: 2016-12, of 265 to 385 0.1 mm. According to the National Lubricating Grease Institute (NLGI) scale, this corresponds to a consistency class No. 0 - 2 according to DIN 51818: 1981-12.
  • the lubricating grease composition has the following composition:
  • a standard grease manufacturing process is used. Heated reactors are used, which can also be designed as autoclaves or vacuum reactors. If necessary, the fat obtained can be homogenized, filtered and / or deaerated.
  • Fierstellbacter A Formation of a lubricating grease composition according to the invention by separate fiering of a complex soap based on aluminum (base grease A) and a polyurea thickener (base grease B-H) with subsequent mixing and additives.
  • Base fat A (complex soap based on aluminum):
  • the base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with an agitator suitable for setting lubricating greases.
  • a heatable reaction tank equipped with an agitator suitable for setting lubricating greases.
  • the aluminum-based complex soap is produced by reacting polyoxyaluminum stearate with benzoic acid and stearic acid.
  • the reaction mixture is then heated, with peak temperatures of up to 210 ° C. in order to drive off the water and melt the thickener.
  • the the subsequent cooling phase determines the morphology of the thickener.
  • the remaining base oil can be used to adjust the consistency.
  • the base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases.
  • the isocyanate component or the isocyanate components are then added and the mixture is heated to 60 ° C. with stirring.
  • part of the base oil is mixed with the amine component or components at 60 ° C. until the solution is homogeneous.
  • the amine solution is added to the isocyanate solution with stirring and heated to up to 200 ° C.
  • the subsequent cooling phase determines the morphology of the thickener.
  • the remaining base oil can be used to adjust the consistency.
  • Base grease A and polyurea grease are mixed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases.
  • the additives are added from 120 ° C. with stirring. Once the desired consistency has been achieved, the product is homogenized, filtered and vented if necessary.
  • Production process B Formation of the lubricating grease composition by sequential production of an aluminum-based complex soap and a polyurea thickener in the base oil with subsequent addition of the additives.
  • the base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases.
  • the aluminum-based complex soap is produced by reacting polyoxyaluminum stearate with benzoic acid and stearic acid. Then the The reaction mixture is heated, with peak temperatures of up to 210 ° C. in order to drive off the water and melt the thickener.
  • the brew is then cooled to 60 ° C. and the isocyanate component or the isocyanate components are added and melted with stirring.
  • part of the base oil is mixed with the amine component or components at 60 ° C. until the solution is homogeneous.
  • the amine solution is added to the isocyanate solution with stirring and heated to up to 200 ° C.
  • the subsequent cooling phase determines the morphology of the thickener.
  • the remaining base oil can be used to adjust the consistency.
  • the additives are added from 120 ° C. with stirring. Once the desired consistency has been achieved, the product is homogenized, filtered and vented if necessary.
  • the lubricating grease compositions shown in Table 1 and Table 2 are produced.
  • the penetration is determined in accordance with DIN ISO 2137: 2016-12. The fulled penetration is measured after 60 double cycles.
  • the oil separation is determined in accordance with ASTM D 6184-17 with the deviations described below.
  • the storage time is 72 hours, with the separated amount of oil being determined after every 24 hi) and ii) the temperature being increased by 10 ° C.
  • the storage time is 30 hours. A separate measurement is carried out here at 130 and 150 ° C.
  • Table 1 Production of basic fats
  • Table 2 shows that the hybrid fats can be produced with a large number of combinations between a thickener comprising a complex soap on aluminum and a polyurea thickener.
  • Table 3 shows that both manufacturing processes mentioned are suitable for formulating comparable fats. Both the content of the
  • Thickening agent based on an aluminum complex soap as well as the content of polyurea thickener with one another and as a whole can be varied.
  • Table 4 and Table 5 show that hybrid greases based on a combination of a thickener comprising a complex soap on aluminum and a polyurea thickener are superior to classic aluminum complex soaps at higher service temperatures.

Abstract

The invention relates to the use of a lubricating grease composition containing a base oil, a thickener, comprising an aluminium-based complex soap and a polyurea thickener for lubricating the surfaces of components in applications in which an upper use temperature of the lubricating grease composition of at least 90°C, for example 90°C to 180°C, preferably at least 100°C, for example 100°C to 180°C, even more preferably 110°C to 180°C and/or 110°C to 170°C, is necessary.

Description

Verwendung einer Schmierfettzusammensetzung mit hoher oberer Use of a grease composition with high upper
Gebrauchstemperatur Use temperature
Beschreibung description
Technisches Gebiet Technical area
Die vorliegende Erfindung betrifft die Verwendung einer Schmierfettzusammensetzung zum Schmieren von Oberflächen in Anwendungen, bei denen eine hohe obere Gebrauchstemperatur notwendig ist und insbesondere in der Automobilindustrie. The present invention relates to the use of a grease composition for lubricating surfaces in applications where a high upper service temperature is necessary and in particular in the automotive industry.
Stand der Technik State of the art
In der Vergangenheit wurden Schmierfette überwiegend bei rein metallischen Bauteilen verwendet. Um den beispielsweise in der Automobilindustrie stetig steigenden Anforderungen an ein geringeres Gewicht und geringere Kosten nachzukommen, werden jedoch zunehmend kunststoffhaltige Bauteile eingesetzt. Aus diesem Grund steigt der Bedarf an Schmierfetten, die auf die Schmierung von Kunststoff enthaltenden Reibpartnern und/oder auf eine Kombination aus metallischen und Kunststoff enthaltenden Reibpartnern abgestimmt sind. Ein wesentliches Anwendungsgebiet für die Schmierung von Kunststoffoberflächen ist die Schmierung von Reibpartnern in Aktuatoren. Zum einen nehmen diese in der Mess-, Steuerungs- und Regelungstechnik, beispielsweise in der Automobilindustrie, nämlich eine zunehmend wichtige Rolle ein und zum anderen weisen sie in der Regel - zumindest anteilig - Kunststoff enthaltende Reibungspartner auf. Kunststoff enthaltende Reibungspartner stellen an Schmierfette aber andere Anforderungen als rein metallische Bauteile, so dass die dort üblicherweise verwendeten Schmierfette in der Regel keine zufriedenstellenden Ergebnisse, beispielsweise im Hinblick auf Reibungskoeffizienten oder Haltbarkeit, bieten. In the past, lubricating greases were mainly used for purely metallic components. In order to meet the steadily increasing requirements for lower weight and lower costs in the automotive industry, for example, plastic-containing components are increasingly being used. For this reason, there is an increasing need for lubricating greases which are matched to the lubrication of friction partners containing plastic and / or to a combination of metallic and plastic-containing friction partners. An essential area of application for the lubrication of plastic surfaces is the lubrication of friction partners in actuators. On the one hand, they are playing an increasingly important role in measurement, control and regulation technology, for example in the automotive industry, and on the other hand, they usually have - at least partially - plastic-containing friction partners. Friction partners containing plastic, however, place different demands on lubricating greases than purely metallic components, so that the lubricating greases usually used there generally do not offer satisfactory results, for example with regard to the coefficient of friction or durability.
Die Eigenschaften der Schmierfette können unter anderem durch geeignete Auswahl der Verdicker eingestellt werden. Für bestimmte Anwendungen haben sich Aluminiumkomplexseifen als Verdicker als geeignet erwiesen. So sind Aluminiumkomplexseifen als Verdicker für Schmierfettzusammensetzungen seit langem bekannt und in vielen Literaturstellen beschrieben, beispielsweise in J.The properties of the lubricating greases can be adjusted, among other things, by suitable selection of the thickener. Aluminum complex soaps have proven to be suitable as thickeners for certain applications. Aluminum complex soaps have long been known as thickeners for lubricating grease compositions and are described in many literature references, for example in J.
L. Dreher, T. H. Koundakijan und C. F. „Manufacture and Properties of Aluminum Complex Greases“, NLGI Spokesman, 107-113,1965; H. W. Kruschwitz „The Development of Formulations for Aluminum Complex Thickener Systems“ NLGI Spokesman, 51-59,1976; H. W. Kruschwitz „The Manufacture and Uses of Aluminum Complex Greases“ NLGI National Meeting Preprints 1985. L. Dreher, T. H. Koundakijan and C. F. "Manufacture and Properties of Aluminum Complex Greases", NLGI Spokesman, 107-113, 1965; H. W. Kruschwitz "The Development of Formulations for Aluminum Complex Thickener Systems" NLGI Spokesman, 51-59, 1976; H. W. Kruschwitz "The Manufacture and Uses of Aluminum Complex Greases" NLGI National Meeting Preprints 1985.
Nichtsdestotrotz wird der globale Markt für Fette dominiert von konventionellen Lithium-Einfachseifen als Verdicker, gefolgt von Lithiumkomplex- und Calciumeinfachseifen. Gerade in der Automobilindustrie, wo generell eine hohe Anforderung an den Temperatureinsatzbereich gestellt wird (mindestens -40°C bis +120°C) sind Aluminiumkomplexseifen kaum präsent. Dies ist umso erstaunlicher, da die Verwendung von Aluminiumkomplexseifen mehrere Vorteile mit sich bringt. Im Vergleich zu Lithiumeinfach- und -komplexseifen wäre hier zum einem die bessere Verfügbarkeit der Aluminiumquelle zu nennen. Gerade in Zeiten der Elektromobilität hat sich der Preis für Lithiumhydroxid in den letzten Jahren drastisch erhöht und es ist in der Zukunft nicht klar abzusehen, wie sich die Verfügbarkeit bzw. der Preis entwickeln werden. Darüber hinaus weisen Aluminiumkomplexseifen eine gute Wasserbeständigkeit, Pumpbarkeit, ein gutes Tieftemperaturverhalten und eine hohe Materialverträglichkeit auf. Nonetheless, the global market for fats is dominated by conventional lithium single soaps as thickeners, followed by lithium complex and calcium single soaps. Especially in the automotive industry, where there are generally high demands on the temperature range (at least -40 ° C to + 120 ° C), aluminum complex soaps are hardly present. This is all the more astonishing as there are several advantages to using aluminum complex soaps. Compared to lithium simple and complex soaps On the one hand, there is the better availability of the aluminum source. Especially in times of electromobility, the price for lithium hydroxide has increased drastically in recent years and it is not clear how the availability or the price will develop in the future. In addition, aluminum complex soaps have good water resistance, pumpability, good low-temperature behavior and high material compatibility.
Ein weiterer Vorteil von Aluminiumkomplexseifen ist, dass sie dazu in der Lage sind aufgrund ihrer hohen Scherinstabilität die dynamische Viskosität des Schmierstoffes herab zu setzen. Hierdurch ermöglichen sie die Verwendung von Grundölen mit höheren Viskositäten, was insbesondere bei Metall / Kunststoff-Reibpartnern vorteilhaft ist. Bedingt durch den hierdurch erhaltenen höheren Schmierstofffilm zwischen den Reibpartnern kann so nämlich der Verschleiß über die Lebensdauer reduziert werden. Darüber hinaus ist eine erhöhte Grundölviskosität vorteilhaft für das Noise Vibration Harshness (NVH) Verhalten im Bauteil. Another advantage of aluminum complex soaps is that they are able to reduce the dynamic viscosity of the lubricant due to their high shear instability. As a result, they enable the use of base oils with higher viscosities, which is particularly advantageous in the case of metal / plastic friction partners. Because of the higher lubricant film obtained between the friction partners as a result, wear can be reduced over the service life. In addition, an increased base oil viscosity is advantageous for the Noise Vibration Harshness (NVH) behavior in the component.
Der Nachteil von Aluminiumkomplexseifen, und sicherlich auch ein Grund warum sie keine breite Verwendung in der Automobilindustrie gefunden haben, ist, dass Aluminiumkomplexseifen zwar einen hohen Tropfpunkt (> 220°C) besitzen, dieser jedoch nicht gleich zu setzen ist mit der oberen Gebrauchstemperatur. Aluminiumkomplexseifen verflüssigen sich in Abhängigkeit von ihrer Konsistenzkennzahl (NLGI) mit der Zeit bei Temperaturen oberhalb von 90°C, stehen somit der zur schmierenden Reibstelle nicht mehr zur Verfügung und erfüllen deshalb nicht die Anforderung der Automobilindustrie von einer hohen oberen Gebrauchstemperatur, die vorzugsweise mindestens 120°C sein sollte. Dementsprechend beschreibt beispielsweise die EP2077318 (A1) eine Aluminiumkomplexseifen-freie Schmierfettzusammensetzung zur Anwendung für Kunststoff enthaltende Reibpartner in Automobilen. Die Schmierfettzusammensetzung enthält ein Grundöl, das ausgewählt ist aus mindestens einem synthetischen Kohlenwasserstofföl, einem synthetischen Öl auf Esterbasis und einem synthetischen Öl auf Etherbasis sowie ein Verdickungsmittel, ausgewählt aus mindestens einer Seife auf Lithiumbasis, einer Komplexseife auf Lithiumbasis und einer Verbindung auf Harnstoffbasis. The disadvantage of aluminum complex soaps, and certainly one of the reasons why they have not found widespread use in the automotive industry, is that although aluminum complex soaps have a high dropping point (> 220 ° C), this cannot be equated with the upper service temperature. Depending on their consistency index (NLGI), aluminum complex soaps liquefy over time at temperatures above 90 ° C, are therefore no longer available for the lubricating friction point and therefore do not meet the requirements of the automotive industry for a high upper service temperature, which is preferably at least 120 Should be ° C. Accordingly, EP2077318 (A1), for example, describes an aluminum complex soap-free lubricating grease composition for use for friction partners containing plastic in automobiles. The grease composition contains a base oil selected from at least one of a synthetic hydrocarbon oil, a synthetic ester-based oil and a synthetic ether-based oil, and a thickener selected from at least a lithium-based soap, a lithium-based complex soap and a urea-based compound.
Es wäre mithin wünschenswert eine Schmierfettzusammensetzung auf Basis eines Aluminiumkomplexverdickers zu erhalten, die zur Schmierung der Oberflächen von Kunststoff enthaltenden Reibpartnern oder von einer Kombination aus metallischen und Kunststoff enthaltenden Reibpartnern geeignet ist und die eine zufrieden stellende Temperaturstabilität in Form einer oberen Gebrauchstemperatur von vorzugsweise über 90°C und insbesondere über 120°C aufweist. It would therefore be desirable to obtain a lubricating grease composition based on an aluminum complex thickener which is suitable for lubricating the surfaces of friction partners containing plastic or of a combination of metallic and plastic friction partners and which has a satisfactory temperature stability in the form of an upper use temperature of preferably above 90 ° C and in particular above 120 ° C.
Darstellung der Erfindung Presentation of the invention
Diese Aufgabe wird erfindungsgemäß gelöst durch die Verwendung einer Schmierfettzusammensetzung, enthaltend ein Grundöl, ein Verdickungsmittel, umfassend eine Komplexseife auf Aluminiumbasis und einen Polyharnstoffverdicker, zur Schmierung der Oberflächen von Bauteilen bei Anwendungen, bei denen eine obere Gebrauchstemperatur der Schmierfettzusammensetzung von mindestens 90°C, beispielweise 90°C bis 180°C und/oder 90°C bis 160°C und/oder 90°C bis 150°C, bevorzugt mindestens 100°C, beispielweise 100°C bis 180°C und/oder 100°C bis 160°C und/oder 100°C bis 150°C, noch bevorzugter 110 °C bis 180°C und/oder 110 bis 170°C und/oder 110°C bis 160°C und/oder 110°C bis 150°C notwendig ist. This object is achieved according to the invention by the use of a lubricating grease composition containing a base oil, a thickening agent comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components in applications in which an upper service temperature of the lubricating grease composition of at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C is necessary.
Überraschend wurde erfindungsgemäß gefunden, dass es die Verwendung eines Verdickungsmittels, umfassend eine Komplexseife auf Aluminiumbasis in Kombination mit einem Polyharnstoffverdicker ermöglicht, eine Schmierfettzusammensetzung zu erhalten, die hervorragend zur Schmierung der Oberflächen von Bauteilen bei Anwendungen geeignet ist, bei denen eine hohe obere Gebrauchstemperatur der Schmierfettzusammensetzung notwendig ist. Somit eignet sich die Schmierfettzusammensetzung hervorragend für Anwendungen im Automobilbereich, da die im Automobilbereich geforderten Gebrauchstemperaturen, die üblicherweise im Bereich von -40°C bis +120°C liegen, problemlos erzielt werden können. Beispiele für Anwendungen, bei denen eine obere Gebrauchstemperatur der Schmierfettzusammensetzung von mindestens 90°C notwendig ist, ist die Schmierung von Kugelgelenken, Stirnrad-, Schnecken- und Planetengetrieben und Aktuatoren von bürstenbehafteten oder bürstenlosen Gleichstrommotoren (DC-, BLDC- Motoren) und/oder Wechselstrommotoren (AC-, BLAC-Motoren). Surprisingly, it has been found according to the invention that the use of a thickening agent comprising an aluminum-based complex soap in combination with a polyurea thickener enables a lubricating grease composition to be obtained which is outstandingly suitable for lubricating the surfaces of components in applications in which the lubricating grease composition has a high upper service temperature necessary is. The lubricating grease composition is therefore outstandingly suitable for applications in the automotive sector, since the use temperatures required in the automotive sector, which are usually in the range from -40 ° C. to + 120 ° C., can be achieved without any problems. Examples of applications in which an upper service temperature of the lubricating grease composition of at least 90 ° C is required are the lubrication of ball joints, spur gears, worm and planetary gears and actuators of brushed or brushless DC motors (DC, BLDC motors) and / or AC motors (AC, BLAC motors).
Die erfindungsgemäß verwendete Schmierfettzusammensetzung weist vorzugsweise eine obere Gebrauchstemperatur von mindestens 90°C, beispielweise 90°C bis 180°C und/oder 90°C bis 160°C und/oder 90°C bis 150°C, bevorzugt mindestens 100°C, beispielweise 100°C bis 180°C und/oder 100°C bis 160°C und/oder 100°C bis 150°C, noch bevorzugter 110 °C bis 180°C und/oder 110 bis 170°C und/oder 110°C bis 160°C und/oder 110°C bis 150°C auf. The lubricating grease composition used according to the invention preferably has an upper use temperature of at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C.
Unter einer oberen Gebrauchstemperatur der Schmierfettzusammensetzung ist die höchste Temperatur zu verstehen, bei der die Schmierfettzusammensetzung eingesetzt werden kann, ohne ihre Gebrauchsfähigkeit zu verlieren. Die obere Gebrauchstemperatur kann erfindungsgemäß durch Messung der Ölabscheidung bei verschiedenen Temperaturen bestimmt werden. Erfindungsgemäß ist die obere Gebrauchstemperatur der Schmierfettzusammensetzung die höchste Temperatur, bei der die Schmierfettzusammensetzung eine Ölabscheidung gemäß ASTM D 6184-17 (24h / X°C) von weniger als 12 Gew.% aufweist. Bevorzugt weist die Schmierfettzusammensetzung eine Ölabscheidung gemäß ASTM D 6184-17 (24h / 100°C) von weniger als 12 Gew.%, noch bevorzugter von weniger als 10 Gew.% und insbesondere weniger als 6 Gew.% auf. Ebenfalls bevorzugt weist die Schmierfettzusammensetzung eine Ölabscheidung gemäß ASTM D 6184-17 (24h / 100°C, anschließend 24h/ 110°C) von weniger als 16 Gew.%, noch bevorzugter weniger als 14 Gew.% und insbesondere weniger als 13 Gew.% auf. Ebenfalls bevorzugt weist die Schmierfettzusammensetzung eine Ölabscheidung gemäß ASTM D 6184-17 (24h / 100°C, anschließend 24h / 110°C, anschließend 24h / 120°C) von weniger als 20 Gew.%, noch bevorzugter weniger als 15 Gew.% und insbesondere weniger als 12 Gew.% auf. An upper use temperature of the lubricating grease composition is to be understood as the highest temperature at which the Lubricating grease composition can be used without losing its serviceability. According to the invention, the upper service temperature can be determined by measuring the oil separation at different temperatures. According to the invention, the upper use temperature of the lubricating grease composition is the highest temperature at which the lubricating grease composition has an oil separation according to ASTM D 6184-17 (24h / X ° C.) of less than 12% by weight. The lubricating grease composition preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C.) of less than 12% by weight, more preferably of less than 10% by weight and in particular less than 6% by weight. The lubricating grease composition also preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C., then 24h / 110 ° C.) of less than 16% by weight, more preferably less than 14% by weight and in particular less than 13% by weight. % on. The lubricating grease composition also preferably has an oil separation according to ASTM D 6184-17 (24h / 100 ° C, then 24h / 110 ° C, then 24h / 120 ° C) of less than 20% by weight, more preferably less than 15% by weight. and in particular less than 12% by weight.
In einer bevorzugten Ausführungsform der Erfindung weist die Schmierfettzusammensetzung einen Gebrauchstemperaturbereich von -60°C bis +180°C und/oder von -50°C bis +160°C, und/oder von -40°C bis +150°C und/oder von -40°C bis +140°C und oder von -40°C bis +120°C auf. Unter einem Gebrauchstemperaturbereich der Schmierfettzusammensetzung ist der Temperaturbereich zu verstehen, bei der die Schmierfettzusammensetzung eingesetzt werden kann, ohne ihre Gebrauchsfähigkeit zu verlieren. So weist erfindungsgemäß eine Schmierfettzusammensetzung bei ihrer Gebrauchstemperatur eine Ölabscheidung gemäß ASTM D 6184-17 (24h / X°C) von weniger als 12 Gew.% auf. Ferner weist eine Schmierfettzusammensetzung bei ihrer Gebrauchstemperatur einen Fließdruck (DIN 51805-2:2016-09) von kleiner gleich 1400 mbar auf. In a preferred embodiment of the invention, the lubricating grease composition has a service temperature range from -60 ° C to + 180 ° C and / or from -50 ° C to + 160 ° C, and / or from -40 ° C to + 150 ° C and / or from -40 ° C to + 140 ° C and or from -40 ° C to + 120 ° C. A service temperature range of the lubricating grease composition is to be understood as meaning the temperature range in which the lubricating grease composition can be used without losing its usability. According to the invention, a lubricating grease composition has an oil separation according to ASTM D 6184-17 (24h / X ° C.) of less than at its temperature of use 12% by weight. Furthermore, a lubricating grease composition has a flow pressure (DIN 51805-2: 2016-09) of less than or equal to 1400 mbar at its service temperature.
Nichtsdestotrotz kann die Schmierfettzusammensetzung auch bei Temperaturen eingesetzt werden, die höher oder tiefer als die oben genannten Temperaturen sind, sofern diese Temperaturen lediglich für einen kurzen Zeitraum, beispielweise weniger als 10 Minuten auftreten. Nevertheless, the lubricating grease composition can also be used at temperatures which are higher or lower than the temperatures mentioned above, provided that these temperatures only occur for a short period of time, for example less than 10 minutes.
Ein weiterer Gegenstand der Erfindung ist die Verwendung einer Schmierfettzusammensetzung, enthaltend ein Grundöl, ein Verdickungsmittel, umfassend eine Komplexseife auf Aluminiumbasis und einen Polyharnstoffverdicker zur Schmierung der Oberflächen von Bauteilen bei Temperaturen, die zumindest zeitweise mindestens 90°C, beispielweise 90°C bis 180°C und/oder 90°C bis 160°C und/oder 90°C bis 150°C, bevorzugt mindestens 100°C, beispielweise 100°C bis 180°C und/oder 100°C bis 160°C und/oder 100°C bis 150°C, noch bevorzugter 110 °C bis 180°C und/oder 110 bis 170°C und/oder 110°C bis 160°C und/oder 110°C bis 150°C betragen. Another object of the invention is the use of a lubricating grease composition containing a base oil, a thickener comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components at temperatures that are at least temporarily at least 90 ° C, for example 90 ° C to 180 ° C and / or 90 ° C to 160 ° C and / or 90 ° C to 150 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C and / or 100 ° C to 160 ° C and / or 100 ° C to 150 ° C, more preferably 110 ° C to 180 ° C and / or 110 to 170 ° C and / or 110 ° C to 160 ° C and / or 110 ° C to 150 ° C.
In einer bevorzugten Ausführungsform der Erfindung wird die Temperatur für einen Zeitraum von mindestens 10 Minuten, noch bevorzugter von mindestens 20 Minuten, noch bevorzugter von mindestens 40 Minuten und insbesondere von mindestens 60 Minuten aufrechterhalten. In a preferred embodiment of the invention, the temperature is maintained for a period of at least 10 minutes, more preferably at least 20 minutes, even more preferably at least 40 minutes and in particular at least 60 minutes.
Die hohe Temperaturstabilität der Schmierfettzusammensetzung war insofern überraschend, als die Verwendung von Komplexseifen auf Basis von Aluminium, wie oben erläutert, bekanntermaßen zu Schmierfetten mit einer eher geringen Temperaturstabilität von in der Regel unter 90°C führt. Ohne sich auf einen Mechanismus festzulegen, wird vermutet, dass sich ein Synergismus zwischen Aluminiumkomplexseite und Polyharnstoffverdicker ausbildet, der die Temperaturstabilität der Aluminiumkomplexseite erhöht. Dies liegt vermutlich daran, dass beide Verdickerkomponenten gut miteinander mischbar sind und somit ein Hybridverdickersystem entsteht. Die deutlich höhere obere Gebrauchstemperatur des Polyharnstoffverdickers beeinflusst dabei positiv die obere Gebrauchstemperatur der Komplexseife auf Aluminiumbasis ohne die allgemeinen positiven Eigenschaften der Komplexseife auf Aluminiumbasis negativ zu beeinflussen. The high temperature stability of the grease composition was surprising insofar as the use of complex soaps based on As explained above, aluminum is known to lead to lubricating greases with a rather low temperature stability of usually below 90 ° C. Without committing to a specific mechanism, it is assumed that a synergism develops between the aluminum complex side and the polyurea thickener, which increases the temperature stability of the aluminum complex side. This is probably due to the fact that both thickener components can be mixed well with one another, thus creating a hybrid thickener system. The significantly higher upper usage temperature of the polyurea thickener has a positive effect on the upper usage temperature of the aluminum-based complex soap without negatively affecting the general positive properties of the aluminum-based complex soap.
Unter einem Polyharnstoffverdicker versteht man ein Reaktionsprodukt aus einem Diisocyanat, vorzugsweise 2,4-Diisocyanatotoluol, 2,6- Diisocyanatotoluol, 4,4'-Diisocyanatodiphenylmethan, 2,4'- Diisocyanatophenylmethan, 4,4'-Diisocyanatodi-phenyl, 4,4'-Diisocyanato-3-3'- dimethylphenyl, 4,4'-Diisocyanato-3,3'-dimethylphenylmethan, die einzeln oder in Kombination verwendet werden können, mit einem Amin der allgemeinen Formel R'2-N-R, oder einem Diamin der allgemeinen Formel R'2-N-R-NR'2, wobei R ein Aryl-, Alkyl- oder Alkylenrest mit 2 bis 22 Kohlenstoffatomen ist und R' identisch oder verschieden ein Wasserstoff, ein Alkyl-, Alkylen- oder Arylrest mit 2 bis 22 Kohlenstoffatomen ist, oder mit Gemischen aus Aminen und Diaminen ist. A polyurea thickener is understood to mean a reaction product of a diisocyanate, preferably 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4'-diisocyanatodiphenylmethane, 2,4'-diisocyanatophenylmethane, 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanatodiphenyl '-Diisocyanato-3-3'-dimethylphenyl, 4,4'-diisocyanato-3,3'-dimethylphenylmethane, which can be used individually or in combination, with an amine of the general formula R'2-NR, or a diamine of general formula R'2-NR-NR'2, where R is an aryl, alkyl or alkylene radical having 2 to 22 carbon atoms and R ', identically or differently, is a hydrogen, an alkyl, alkylene or aryl radical having 2 to 22 carbon atoms is, or with mixtures of amines and diamines.
Der Anteil des Polyharnstoffverdickers in der erfindungsgemäßen Schmierfettzusammensetzung beträgt vorzugsweise 1 Gew.% bis 11 Gew.%, noch bevorzugter von 2 Gew.% bis 10 Gew.%, und insbesondere von 3 Gew.% bis 9 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. Erfindungsgemäß können grundsätzlich die verschiedensten, üblicherweise in Schmierfettzusammensetzungen eingesetzten, Komplexseifen auf Aluminiumbasis verwendet werden. In einer Ausführungsform der vorliegenden Erfindung sind Komplexseifen auf Aluminiumbasis der The proportion of the polyurea thickener in the lubricating grease composition according to the invention is preferably 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight, and in particular from 3% by weight to 9% by weight, in each case based on the Total weight of the grease composition. According to the invention, the most varied of complex soaps based on aluminum, usually used in lubricating grease compositions, can be used. In one embodiment of the present invention, aluminum-based complex soaps are
Formel 1: Allgemeine Struktur Aluminiumkomplexseife aufgrund ihrer guten Verfügbarkeit bevorzugt. Der Fettsäurerest R ist dabei vorzugsweise ein aliphatischer Kohlenwasserstoffrest mit 4 bis 28 Kohlenstoffatomen (R = C4-C28). Dabei ist eine gerade Anzahl von Kohlenstoffatomen bevorzugt, da diese in den meisten natürlich vorkommenden Fettsäuren vorkommt. Besonders bevorzugt ist R = C12-C22. Weiterhin bevorzugt sind die Reste R abgeleitet von Fettsäuren, ausgewählt aus der Gruppe bestehend aus Laurinsäure, Palmitinsäure, Myristinsäure, Stearinsäure und Gemischen hiervon. Formula 1: General structure Aluminum complex soap preferred due to its good availability. The fatty acid residue R is preferably an aliphatic hydrocarbon residue with 4 to 28 carbon atoms (R = C4-C28). An even number of carbon atoms is preferred since this occurs in most naturally occurring fatty acids. R = C12-C22 is particularly preferred. The radicals R derived from fatty acids selected from the group consisting of lauric acid, palmitic acid, myristic acid, stearic acid and mixtures thereof are also preferred.
Bei Komplexseifen auf Aluminiumbasis wie gezeigt in Formel 1 handelt es sich um Aluminiumcarboxylatverbindungen, die durch eine Umsetzung von einer Fettsäure, einer aromatischen Carbonsäure und einem Aluminiumalkoholderivat hergestellt werden können. Kommerziell eingesetzte Aluminiumalkoholate sind Aluminiumisopropoxylat oder Trioxyaluminium-triisopropoxid. Ein einfacher Weg zur Herstellung der vorgenannten Komplexseifen auf Aluminiumbasis umfasst die Umsetzung zwischen einem Trioxyaluminium-triisopropoxid (kurz Al-Trimer), einer Fettsäure und Benzoesäure: Formel 2: Umsetzung eines Aluminiumalkoholates (Pri = Isopropyl) mit Benzoesäure und einer Fettsäure Aluminum-based complex soaps as shown in Formula 1 are aluminum carboxylate compounds that can be produced by a reaction of a fatty acid, an aromatic carboxylic acid and an aluminum alcohol derivative. Commercially used aluminum alcoholates are aluminum isopropoxylate or trioxyaluminum triisopropoxide. A simple way of producing the aforementioned complex soaps based on aluminum involves the reaction between a trioxyaluminum triisopropoxide (Al trimer for short), a fatty acid and benzoic acid: Formula 2: Reaction of an aluminum alcoholate (Pri = isopropyl) with benzoic acid and a fatty acid
Alternativ kann auch eine Zwischenstufe wie z.B. Poly-oxy-aluminiumstearat zur entsprechenden Komplexseife umgesetzt werden. Dadurch entfällt in der Fettherstellung die Freisetzung von einem niedermolekularen Alkohol wie z.B. Isopropylalkohol. Alternatively, an intermediate stage such as polyoxyaluminum stearate can also be converted into the corresponding complex soap. This eliminates the need to release a low molecular weight alcohol such as isopropyl alcohol in fat production.
An der Verwendung der Komplexseifen auf Aluminiumbasis als Verdicker ist, wie oben erläutert, vorteilhaft, dass sie eine gute Verfügbarkeit mit einem niedrigen Preis kombinieren. Darüber hinaus weisen Aluminiumkomplexseifen eine gute Wasserbeständigkeit, Pumpbarkeit, ein gutes Tieftemperaturverhalten und eine hohe Materialverträglichkeit auf. As explained above, the advantage of using the complex soaps based on aluminum as thickeners is that they combine good availability with a low price. In addition, aluminum complex soaps have good water resistance, pumpability, good low-temperature behavior and high material compatibility.
Der Anteil der Komplexseife auf Aluminiumbasis in der erfindungsgemäßen Schmierfettzusammensetzung beträgt vorzugsweise von 1 Gew.% bis 11 Gew.%, noch bevorzugter von 2 Gew.% bis 10 Gew.% und insbesondere von 3 Gew.% bis 9 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. The proportion of the complex soap based on aluminum in the lubricating grease composition according to the invention is preferably from 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight and in particular from 3% by weight to 9% by weight, in each case based on based on the total weight of the grease composition.
In einer bevorzugten Ausführungsform der Erfindung beträgt der Anteil von Komplexseife auf Aluminiumbasis und Polyharnstoffverdicker zusammengenommen von 2 Gew.% bis 22 Gew.%, noch bevorzugter von 4 Gew.% bis 20 Gew.% und insbesondere von 6 Gew.% bis 18 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. Eine bevorzugte Ausführungsform der Erfindung umfasst die Verwendung der Schmierfettzusammensetzung zur Schmierung der Oberflächen von Kunststoff enthaltenden Reibpartnern oder von einer Kombination aus metallischen und Kunststoff enthaltenden Reibpartnern und insbesondere von Reibpartnern der vorgenannten Art in Aktuatoren, insbesondere im Automobilbereich. In a preferred embodiment of the invention, the proportion of complex soap based on aluminum and polyurea thickener taken together is from 2% by weight to 22% by weight, more preferably from 4% by weight to 20% by weight and in particular from 6% by weight to 18% by weight. %, each based on the total weight of the lubricating grease composition. A preferred embodiment of the invention comprises the use of the lubricating grease composition for lubricating the surfaces of plastic-containing friction partners or of a combination of metallic and plastic-containing friction partners and in particular of friction partners of the aforementioned type in actuators, in particular in the automotive sector.
Als Grundöle sind übliche bei Raumtemperatur (20°C) flüssige Schmieröle geeignet. Das Grundöl weist vorzugsweise eine kinematische Viskosität von 18 mm2/s bis 20000 mm2/s, insbesondere von 30 mm2/s bis 400 mm2/s bei 40°C auf. Bei Grundölen unterscheidet man zwischen Mineral- und Syntheseölen. Unter einem Grundöl sind die üblichen für die Herstellung von Schmierstoffen verwendeten Basisflüssigkeiten, insbesondere Öle, die den Gruppen I, II, II+, III, IV oder V nach der Klassifizierung des American Petroleum Institute (API)Common lubricating oils which are liquid at room temperature (20 ° C) are suitable as base oils. The base oil preferably has a kinematic viscosity of 18 mm 2 / s to 20,000 mm 2 / s, in particular from 30 mm 2 / s to 400 mm 2 / s at 40 ° C. When it comes to base oils, a distinction is made between mineral and synthetic oils. A base oil includes the base fluids commonly used for the production of lubricants, in particular oils that belong to groups I, II, II +, III, IV or V according to the classification of the American Petroleum Institute (API)
[NLGI Spokesman, N. Samman, Volume 70, Number 11, S.14ff] zugeordnet werden können, zu verstehen. Mineralöle werden nach der API Group klassifiziert. API Group I sind Mineralöle, die z. B. aus naphthenbasischen bzw paraffinbasischen Ölen bestehen. Sind diese Mineralöle im Vergleich zu API Group I Ölen chemisch modifiziert, aromatenarm, schwefelarm und besitzen einen geringen Anteil an gesättigten Verbindungen und somit ein verbessertes Viskositäts/Temperatur-Verhalten, klassifiziert man die Öle nach API Group II und III. Zur API Group III zählen auch sogenannte Gas-to-Liquid Öle, welche nicht aus der Raffination von Rohöl, sondern durch die chemische Umsetzung von Erdgas hergestellt werden. [NLGI Spokesman, N. Samman, Volume 70, Number 11, p.14ff] can be assigned to understand. Mineral oils are classified according to the API Group. API Group I are mineral oils that are e.g. B. consist of naphthenic or paraffinic oils. If these mineral oils are chemically modified compared to API Group I oils, low in aromatic compounds, low in sulfur and have a low proportion of saturated compounds and thus an improved viscosity / temperature behavior, the oils are classified according to API Group II and III. API Group III also includes so-called gas-to-liquid oils, which are not produced from the refining of crude oil, but through the chemical conversion of natural gas.
Als Syntheseöle genannt seien Polyether, Ester, Polyester, vorzugsweise Polyalphaolefine, insbesondere metallocene Polyalphaolefine, Polyether, Perfluoropolyalkylether (PFPAE), alyklierte Naphthaline, Silikonöle und Alkylaromaten und deren Mischungen. Die Polyether-Verbindung kann freie Hydroxylgruppen aufweisen, aber auch vollständig verethert oder Endgruppen verestert sein und/oder aus einer Startverbindung mit einer oder mehreren Hydroxy- und/oder Carboxylgruppen(-COOH) hergestellt sein. Möglich sind auch Polyphenylether, ggf. alkyliert, als alleinige Komponenten oder besser noch als Mischkomponenten. Synthetic oils that may be mentioned are polyethers, esters, polyesters, preferably polyalphaolefins, in particular metallocenes, polyalphaolefins, polyethers, perfluoropolyalkyl ethers (PFPAE), alkylated naphthalenes, silicone oils and alkyl aromatics and mixtures thereof. The polyether compound can have free hydroxyl groups, but it can also be completely etherified or end groups esterified and / or composed of a starter compound with one or more Hydroxy and / or carboxyl groups (-COOH) be produced. Polyphenyl ethers, optionally alkylated, are also possible as sole components or, even better, as mixed components.
Geeignet einsetzbar sind Ester einer aromatischen und/oder aliphatischen Di-, Tri- oder Tetracarbonsäure mit einem oder in Mischung vorliegenden C7- bis C22-Alkoholen, Ester von Trimethylolpropan, Pentaerythrit oder Dipentaerythrit mit aliphatischen C7 bis C22-Carbonsäuren, Ester von C18-Dimersäuren mit C7- bis C22-Alkoholen, Komplexester, als Einzelkomponenten oder in beliebiger Mischung. Esters of an aromatic and / or aliphatic di-, tri- or tetracarboxylic acid with one or in a mixture of C7 to C22 alcohols, esters of trimethylolpropane, pentaerythritol or dipentaerythritol with aliphatic C7 to C22 carboxylic acids, esters of C18 dimer acids are suitable with C7 to C22 alcohols, complex esters, as individual components or in any mixture.
Ebenfalls geeignet sind Silikonöle, native Öle und Derivate von nativen Ölen. Silicone oils, native oils and derivatives of native oils are also suitable.
Erfindungsgemäß besonders bevorzugte Grundöle sind Polyalphaolefine, insbesondere metallocene Polyalphaolefine, sowie naphthenbasische Mineralöle gemäß Klassifizierung nach API Group I. Base oils which are particularly preferred according to the invention are polyalphaolefins, in particular metallocene polyalphaolefins, and naphthenic mineral oils according to the API Group I.
In einer bevorzugten Ausführungsform der Erfindung beträgt der Anteil des Grundöls in der erfindungsgemäßen Schmierfettzusammensetzung von 55 Gew.% bis 98 Gew.%, noch bevorzugter von 60 Gew.% bis 95 Gew.%, und insbesondere von 68 Gew.% bis 92 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. In a preferred embodiment of the invention, the proportion of the base oil in the lubricating grease composition according to the invention is from 55% by weight to 98% by weight, more preferably from 60% by weight to 95% by weight, and in particular from 68% by weight to 92% by weight. %, each based on the total weight of the lubricating grease composition.
Neben Grundöl(en) und Verdicker(n) kann die erfindungsgemäße Zusammensetzung auch weitere Zusatzstoffe enthalten, beispielweise Antioxidantien, Korrosionsschutzmittel, Schmierfähigkeitsverbesserer, Hochdruck- und Verschleißschutzadditive, Metalldeaktivatoren, Viskositäts- und Haftverbesserer, Farbstoffe, Reibungsreduzierer. Der Zusatz von Antioxidantien kann die Oxidation der erfindungsgemäßen Schmierfettzusammensetzung, insbesondere bei ihrem Einsatz, verringern oder gar verhindern. Bei einer Oxidation können unerwünschte freie Radikale entstehen und infolgedessen vermehrt Zersetzungsreaktionen des Schmierstoffes auftreten. Durch die Zugabe von Antioxidantien wird die Schmierfettzusammensetzung stabilisiert. In addition to base oil (s) and thickener (s), the composition according to the invention can also contain further additives, for example antioxidants, corrosion inhibitors, lubricity improvers, extreme pressure and wear protection additives, metal deactivators, viscosity and adhesion improvers, dyes, friction reducers. The addition of antioxidants can reduce or even prevent the oxidation of the lubricating grease composition according to the invention, in particular when it is used. In the event of oxidation, undesirable free radicals can arise and, as a result, more decomposition reactions of the lubricant occur. The addition of antioxidants stabilizes the grease composition.
Erfindungsgemäß besonders geeignete Antioxidantien sind die folgenden Verbindungen: styrolisierte Diphenylamine, diaromatische Amine, Phenolharze, Thiophenolharze, Phosphite, butyliertes Hydroxytoluol, butyliertes Hydroxyanisol, Phenyl-alpha-naphthylamin, Phenyl-beta-naphthylamin, octyliertes/butyliertes Diphenylamin, di-alpha-Tocopherol, di-tert-butyl-Phenyl, Benzolpropansaure, schwefelhaltige Phenolverbindungen und Mischungen dieser Komponenten. Antioxidants particularly suitable according to the invention are the following compounds: styrenated diphenylamines, diaromatic amines, phenolic resins, thiophenolic resins, phosphites, butylated hydroxytoluene, butylated hydroxyanisole, phenyl-alpha-naphthylamine, phenyl-beta-naphthylamine, octylated / butylated diphenylamine, di-tocopherol di-tert-butyl-phenyl, benzene propanoic acid, sulfur-containing phenolic compounds and mixtures of these components.
Weiterhin kann die Schmierfettzusammensetzung weitere Additive, insbesondere Korrosionsschutzadditive, Metalldesaktivatoren oder lonen- Komplexbildner enthalten. Hierzu zählen Triazole, Imidazoline, N-Methylglycin (Sarcosin), Benzotriazolderivate, N,N-Bis(2-ethylhexyl)-ar-methyl-1 H- benzotriazol-1 -methanamin; n-Methyl-N(1 -oxo-9-octadecenyl)glycin, Gemische aus Phosphorsäure und Mono-und Diisooctylester umgesetzt mit (C11-14)- Alkylaminen, Gemische aus Phosphorsäure und Mono-und Diisooctylester umgesetzt mit tert-Alkylamin und primären (Ci2-14)-Aminen, Dodekansäure, Triphenylphosphorthionat und Aminphosphate. Kommerziell erhältliche Additive sind die folgenden: IRGAMET® 39, IRGACOR® DSS G, Amin 0; SARKOSYL® Furthermore, the lubricating grease composition can contain further additives, in particular corrosion protection additives, metal deactivators or ion complexing agents. These include triazoles, imidazolines, N-methylglycine (sarcosine), benzotriazole derivatives, N, N-bis (2-ethylhexyl) -ar-methyl-1H-benzotriazole-1-methanamine; n-Methyl-N (1 -oxo-9-octadecenyl) glycine, mixtures of phosphoric acid and mono- and diisooctyl esters reacted with (C11-14) -alkylamines, mixtures of phosphoric acid and mono- and diisooctyl esters reacted with tert-alkylamine and primary ( Ci2-14) amines, dodecanoic acid, triphenyl phosphorothionate and amine phosphates. Commercially available additives are the following: IRGAMET ® 39, IRGACOR ® DSS G, amine 0; SARKOSYL ®
O (Ciba), COBRATEC® 122, CUVAN® 303, VANLUBE®9123, CI-426, CI-426EP, CI-429 und CI-498. O (Ciba), COBRATEC ® 122, CUVAN ® 303, VANLUBE ® 9123, CI-426, CI-426EP, CI-429 and CI-498th
Weitere denkbare Verschleißschutzadditive sind Amine, Aminphosphate, Phosphate, Thiophosphate, Phosphorthionate und Mischungen dieser Komponenten. Zu den kommerziell erhältlichen Verschleißschutzadditiven gehören IRGALUBE®TPPT, IRGALUBE® 232, IRGALUBE® 349,Further conceivable anti-wear additives are amines, amine phosphates, phosphates, thiophosphates, phosphorothionates and mixtures of these Components. The commercially available anti-wear additives include IRGALUBE ® TPPT, IRGALUBE ® 232, IRGALUBE ® 349,
IRGALUBE®211 und ADDITIN® RC3760 Liq 3960, FIRC-SHUN® FG 1505 und FG 1506, NA-LUBE® KR-015FG, LUBEBOND®, FLUORO®FG, SYNALOX® 40- D, ACHESON® FGA 1820 und ACHESON®FGA 1810. IRGALUBE ® 211 and ADDITIN ® RC3760 Liq 3960, FIRC-SHUN ® FG 1505 and FG 1506, NA-LUBE ® KR-015FG, LUBEBOND ® , FLUORO ® FG, SYNALOX ® 40-D, ACHESON ® FGA 1820 and ACHESON ® FGA 1810 .
Vorzugsweise beträgt der Anteil der weiteren Additive von 1 Gew.% bis 30 Gew.%, noch bevorzugter von 1 ,5 Gew.% bis 25 Gew.%, und insbesondere von 2 Gew.% bis 20 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. The proportion of the further additives is preferably from 1% by weight to 30% by weight, even more preferably from 1.5% by weight to 25% by weight, and in particular from 2% by weight to 20% by weight, in each case based on the Total weight of the grease composition.
Des Weiteren kann die Schmierfettzusammensetzung Festschmierstoffe wie PTFE, Bornitrid, Polymerpulver wie z.B. PTFE, Polyamide oder Polyimide, Pyrophosphat, Metalloxide wie z.B. Zinkoxid oder Magnesiumoxid, Metallsulfide wie z.B. Zinksulfid, Molydänsulfid, Wolframsulfid oder Zinnsulfid,Furthermore, the grease composition can contain solid lubricants such as PTFE, boron nitride, polymer powder such as PTFE, polyamides or polyimides, pyrophosphate, metal oxides such as zinc oxide or magnesium oxide, metal sulfides such as zinc sulfide, molybdenum sulfide, tungsten sulfide or tin sulfide,
Pyrophosphate, Thiosulfate, Magnesiumcarbonat, Calciumcarbonat, Calciumstearat, Kohlenstoffmodifikationen wie z.B. Ruß, Graphit, Graphen, Nano-Tubes, Fullerene, Si02-Modifikationen, Melanincyanurat, oder eine Mischung daraus enthalten. Pyrophosphates, thiosulfates, magnesium carbonate, calcium carbonate, calcium stearate, carbon modifications such as carbon black, graphite, graphene, nanotubes, fullerenes, SiO2 modifications, melanin cyanurate, or a mixture thereof.
Vorzugsweise beträgt der Anteil der Festschmierstoffe von 1 Gew.% bis 30 Gew.% noch bevorzugter von 1 ,5 Gew.% bis 25 Gew.%, und insbesondere von 2 Gew.% bis 20 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung. The proportion of solid lubricants is preferably from 1% by weight to 30% by weight, more preferably from 1.5% by weight to 25% by weight, and in particular from 2% by weight to 20% by weight, based in each case on the total weight of the Grease composition.
Weiter bevorzugt besitzt die Schmierfettzusammensetzung eine Walkpenetration, bestimmt nach DIN ISO 2137:2016-12, von 265 bis 385 0,1 mm. Dies entspricht nach der Skala des National Lubricating Grease Institute (NLGI) einer Konsistenz-Klasse Nr. 0 - 2 gemäß DIN 51818: 1981 -12. In einer bevorzugten Ausführungsform der Erfindung weist die Schmierfettzusammensetzung folgende Zusammensetzung auf: The lubricating grease composition more preferably has a worked penetration, determined in accordance with DIN ISO 2137: 2016-12, of 265 to 385 0.1 mm. According to the National Lubricating Grease Institute (NLGI) scale, this corresponds to a consistency class No. 0 - 2 according to DIN 51818: 1981-12. In a preferred embodiment of the invention, the lubricating grease composition has the following composition:
55 bis 96 Gew.% Grundöl, 55 to 96% by weight base oil,
1 bis 11 Gew.% Polyharnstoffverdicker, 1 to 11% by weight polyurea thickener,
1 bis 11 Gew.% Komplexseife auf Aluminiumbasis,1 to 11% by weight complex soap based on aluminum,
1 bis 30 Gew.% Additive, 1 to 30% by weight of additives,
1 bis 30 Gew.% Festschmierstoffe. 1 to 30% by weight of solid lubricants.
Im Folgenden wird die Erfindung anhand verschiedener Beispiele näher erläutert. The invention is explained in more detail below with the aid of various examples.
Fierstellung einer erfindungsgemäßen Schmierfettzusammensetzung: Establishing a lubricating grease composition according to the invention:
Es wird ein Standardherstellverfahren für Schmierfette benutzt. Verwendung finden beheizte Reaktoren, die auch als Autoklav oder Vakuumreaktor ausgelegt sein können. Im Bedarfsfall kann das erhaltene Fett homogenisiert, filtriert und/oder entlüftet werden. A standard grease manufacturing process is used. Heated reactors are used, which can also be designed as autoclaves or vacuum reactors. If necessary, the fat obtained can be homogenized, filtered and / or deaerated.
Fierstellverfahren A: Bildung einer erfindungsgemäßen Schmierfettzusammensetzung durch separate Fierstellung einer Komplexseife auf Aluminiumbasis- (Basisfett A) und eines Polyharnstoffverdickers (Basisfett B-H) mit anschließender Vermischung und Additivierung. Fierstellverfahren A: Formation of a lubricating grease composition according to the invention by separate fiering of a complex soap based on aluminum (base grease A) and a polyurea thickener (base grease B-H) with subsequent mixing and additives.
Basisfett A (Komplexseife auf Aluminiumbasis): Base fat A (complex soap based on aluminum):
In einem beheizbaren Reaktionsbehälter, ausgestattet mit einem für die Fierstellung von Schmierfetten geeigneten Rührwerk, wird das Grundöl bzw. ein Teil des Grundöles oder Ölgemisches vorgelegt. Darin erfolgt die Fierstellung der Komplexseife auf Aluminiumbasis durch Reaktion von Polyoxyaluminium- Stearat mit Benzoesäure und Stearinsäure. Anschließend wird das Reaktionsgemisch erhitzt, wobei Spitzentemperaturen bis 210°C auftreten können, um das Wasser auszutreiben und den Verdicker aufzuschmelzen. Die anschließende Abkühlphase bestimmt die Morphologie des Verdickers. Hierbei kann restliches Grundöl zum gezielten Einstellen der Konsistenz verwendet werden. The base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with an agitator suitable for setting lubricating greases. This is where the aluminum-based complex soap is produced by reacting polyoxyaluminum stearate with benzoic acid and stearic acid. The reaction mixture is then heated, with peak temperatures of up to 210 ° C. in order to drive off the water and melt the thickener. The the subsequent cooling phase determines the morphology of the thickener. The remaining base oil can be used to adjust the consistency.
Basisfette B-H (Polyharnstoffverdicker): Basic fats B-H (polyurea thickener):
In einem beheizbaren Reaktionsbehälter, ausgestattet mit einem für die Herstellung von Schmierfetten geeigneten Rührwerk wird das Grundöl bzw. ein Teil des Grundöles oder Ölgemisches vorgelegt. Anschließend wird die Isocyanatkom ponente oder die Isocyanatkomponenten zugegeben und unter Rühren auf 60°C erwärmt. In einem separaten Reaktionsbehälter wird ein Teil des Grundöles mit der Aminkomponente oder den Aminkomponenten bei 60°C vermischt bis die Lösung homogen ist. Die Aminlösung wird unter Rühren der Isocyanatlösung hinzugegeben und auf bis zu 200°C erhitzt. Die anschließende Abkühlphase bestimmt die Morphologie des Verdickers. Hierbei kann restliches Grundöl zum gezielten Einstellen der Konsistenz verwendet werden. The base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases. The isocyanate component or the isocyanate components are then added and the mixture is heated to 60 ° C. with stirring. In a separate reaction vessel, part of the base oil is mixed with the amine component or components at 60 ° C. until the solution is homogeneous. The amine solution is added to the isocyanate solution with stirring and heated to up to 200 ° C. The subsequent cooling phase determines the morphology of the thickener. The remaining base oil can be used to adjust the consistency.
Basisfett A und Polyharnstofffett (Basisfett B-H) werden in einem beheizbaren Reaktionsbehälter, ausgestattet mit einem für die Herstellung von Schmierfetten geeigneten Rührwerk vermischt. Es erfolgt unter Rühren ab 120°C die Zugabe der Additive. Ist die gewünschte Konsistenz erreicht, wird das Produkt homogenisiert, ggf. gefiltert und entlüftet. Base grease A and polyurea grease (base grease B-H) are mixed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases. The additives are added from 120 ° C. with stirring. Once the desired consistency has been achieved, the product is homogenized, filtered and vented if necessary.
Herstellverfahren B: Bildung des Schmierfettzusammensetzung durch sequentielle Herstellung einer Komplexseife auf Aluminiumbasis und eines Polyharnstoffverdickers im Grundöl mit anschließender Zugabe der Additive. In einem beheizbaren Reaktionsbehälter, ausgestattet mit einem für die Herstellung von Schmierfetten geeigneten Rührwerk wird das Grundöl bzw. ein Teil des Grundöles oder Ölgemisches vorgelegt. Darin erfolgt die Herstellung der Komplexseife auf Aluminiumbasis durch Reaktion von Polyoxyaluminium- Stearat mit Benzoesäure und Stearinsäure. Anschließend wird das Reaktionsgemisch erhitzt, wobei Spitzentemperaturen bis 210°C auftreten können, um das Wasser auszutreiben und den Verdicker aufzuschmelzen. Anschließend wird der Sud auf 60°C abgekühlt und die Isocyanatkom ponente oder die Isocyanatkomponenten zugegeben und unter Rühren aufgeschmolzen. In einem separaten Reaktionsbehälter wird ein Teil des Grundöles mit der Aminkomponente oder den Aminkomponenten bei 60°C vermischt bis die Lösung homogen ist. Die Aminlösung wird unter Rühren der Isocyanatlösung hinzugegeben und auf bis zu 200°C erhitzt. Die anschließende Abkühlphase bestimmt die Morphologie des Verdickers. Hierbei kann restliches Grundöl zum gezielten Einstellen der Konsistenz verwendet werden. Es erfolgt unter Rühren ab 120°C die Zugabe der Additive. Ist die gewünschte Konsistenz erreicht, wird das Produkt homogenisiert, ggf. gefiltert und entlüftet. Production process B: Formation of the lubricating grease composition by sequential production of an aluminum-based complex soap and a polyurea thickener in the base oil with subsequent addition of the additives. The base oil or part of the base oil or oil mixture is placed in a heatable reaction tank equipped with a stirrer suitable for the production of lubricating greases. This is where the aluminum-based complex soap is produced by reacting polyoxyaluminum stearate with benzoic acid and stearic acid. Then the The reaction mixture is heated, with peak temperatures of up to 210 ° C. in order to drive off the water and melt the thickener. The brew is then cooled to 60 ° C. and the isocyanate component or the isocyanate components are added and melted with stirring. In a separate reaction vessel, part of the base oil is mixed with the amine component or components at 60 ° C. until the solution is homogeneous. The amine solution is added to the isocyanate solution with stirring and heated to up to 200 ° C. The subsequent cooling phase determines the morphology of the thickener. The remaining base oil can be used to adjust the consistency. The additives are added from 120 ° C. with stirring. Once the desired consistency has been achieved, the product is homogenized, filtered and vented if necessary.
Nach dem oben beschriebenen Verfahren werden die in Tabelle 1 und Tabelle 2 gezeigten Schmierfettzusammensetzungen (Basisfette A 1-2 / Basisfette B-H/ Hybrid 1-15) hergestellt. According to the method described above, the lubricating grease compositions shown in Table 1 and Table 2 (base fats A 1-2 / base fats B-H / hybrid 1-15) are produced.
Ein Vergleich der Herstellmethode A und B ist in Tabelle 3 dargestellt. Der geringe Unterschied in den Penetrationswerten zeigt, dass beide Herstellverfahren geeignet sind, um ein entsprechendes Hybridfett herzustellen. A comparison of production methods A and B is shown in Table 3. The slight difference in the penetration values shows that both production processes are suitable for producing a corresponding hybrid fat.
Die Bestimmung der Penetration erfolgt gemäß DIN ISO 2137:2016-12. Gemessen wird die Walkpenetration nach 60 Doppeltakten. The penetration is determined in accordance with DIN ISO 2137: 2016-12. The fulled penetration is measured after 60 double cycles.
Die Bestimmung der Ölabscheidung erfolgt gemäß ASTM D 6184-17 mit den nachfolgend beschriebenen Abweichungen. Für Tabelle 4 beträgt die Einlagerungszeit abweichend 72 h, wobei nach jeweils 24 h i) die separierte Ölmenge bestimmt und ii) die Temperatur um 10°C erhöht wird. Für Tabelle 5 beträgt die Einlagerungszeit 30 h. Hier erfolgt jeweils eine separate Messung bei 130 und 150°C. Tabelle 1: Herstellung von Basisfetten The oil separation is determined in accordance with ASTM D 6184-17 with the deviations described below. For Table 4, the storage time is 72 hours, with the separated amount of oil being determined after every 24 hi) and ii) the temperature being increased by 10 ° C. For Table 5 the storage time is 30 hours. A separate measurement is carried out here at 130 and 150 ° C. Table 1: Production of basic fats
Tabelle 2: Herstellung von Hybridfetten Table 2: Production of hybrid fats
Tabelle 3: Vergleich der Herstellverfahren A / B anhand zweier Hybridfette mit unterschiedlichen Verdickeranteilen Table 3: Comparison of manufacturing processes A / B using two hybrid greases with different proportions of thickener
Tabelle 4: Bestimmung der Ölseparation gemäß ASTM D6184-17 nach jeweils 24 h bei 100 + 24h bei 110, +24 h bei 120°C Table 4: Determination of the oil separation according to ASTM D6184-17 after 24 hours at 100 + 24 hours at 110, +24 hours at 120 ° C
Tabelle 5: Bestimmung der Ölseparation gemäß ASTM D6184-17 bei 130 und 150°C für jeweils 30 h Table 5: Determination of the oil separation according to ASTM D6184-17 at 130 and 150 ° C for 30 h in each case
Aus den Ergebnissen können folgende Schlüsse gezogen werden: Tabelle 2 zeigt, dass die Herstellung der Hybridfette mit einer Vielzahl von Kombinationen zwischen einem Verdickungsmittel umfassend eine Komplexseife auf Aluminium und einem Polyharnstoffverdicker erfolgen kann. Tabelle 3 zeigt, dass beide benannte Herstellverfahren geeignet sind, um vergleichbare Fette zu formulieren. Dabei kann sowohl der Gehalt desThe following conclusions can be drawn from the results: Table 2 shows that the hybrid fats can be produced with a large number of combinations between a thickener comprising a complex soap on aluminum and a polyurea thickener. Table 3 shows that both manufacturing processes mentioned are suitable for formulating comparable fats. Both the content of the
Verdickungsmittels basierend auf einer Aluminiumkomplexseife als auch der Gehalt an Polyharnstoffverdicker untereinander als auch insgesamt variiert werden. Tabelle 4 und Tabelle 5 zeigen anhand des Vergleiches der Ölabscheidungen, dass Hybridfette basierend auf einer Kombination eines Verdickungsmittels umfassend eine Komplexseife auf Aluminium und einem Polyharnstoffverdicker bei höheren Gebrauchstemperaturen den klassischen Aluminiumkomplexseifen überlegen sind. Thickening agent based on an aluminum complex soap as well as the content of polyurea thickener with one another and as a whole can be varied. By comparing the oil separations, Table 4 and Table 5 show that hybrid greases based on a combination of a thickener comprising a complex soap on aluminum and a polyurea thickener are superior to classic aluminum complex soaps at higher service temperatures.

Claims

Patentansprüche Claims
1. Verwendung einer Schmierfettzusammensetzung, enthaltend ein Grundöl, ein Verdickungsmittel, umfassend eine Komplexseife auf Aluminiumbasis und einen Polyharnstoffverdicker zur Schmierung der Oberflächen von Bauteilen bei Anwendungen, bei denen eine obere Gebrauchstemperatur der1. Use of a lubricating grease composition containing a base oil, a thickener comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components in applications where an upper service temperature of the
Schmierfettzusammensetzung von mindestens 90°C, beispielweise 90°C bis 180°C, bevorzugt mindestens 100°C, beispielweise 100°C bis 180°C, noch bevorzugter 110°C bis 180°C und/oder 110°C bis 170°C notwendig ist. Lubricating grease composition of at least 90 ° C, for example 90 ° C to 180 ° C, preferably at least 100 ° C, for example 100 ° C to 180 ° C, even more preferably 110 ° C to 180 ° C and / or 110 ° C to 170 ° C necessary is.
2. Verwendung einer Schmierfettzusammensetzung, enthaltend ein Grundöl, ein Verdickungsmittel, umfassend eine Komplexseife auf Aluminiumbasis und einen Polyharnstoffverdicker, zur Schmierung der Oberflächen von Bauteilen bei Temperaturen, die zumindest zeitweise mindestens 90°C, beispielweise 90°C bis 180°C und/oder mindestens 100°C, beispielweise 100°C bis 180°C und/oder 110°C bis 180°C und/oder 110°C bis 170°C betragen. 2. Use of a lubricating grease composition containing a base oil, a thickener comprising an aluminum-based complex soap and a polyurea thickener for lubricating the surfaces of components at temperatures that are at least temporarily at least 90 ° C, for example 90 ° C to 180 ° C and / or at least 100 ° C, for example 100 ° C to 180 ° C and / or 110 ° C to 180 ° C and / or 110 ° C to 170 ° C.
3. Verwendung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schmierfettzusammensetzung einen Gebrauchstemperaturbereich von -60°C bis +180°C und/oder von -50°C bis +160°C, und/oder von - 40°C bis +150°C und/oder von -40°C bis +140°C und oder von -40°C bis +120°C aufweist. 3. Use according to claim 1 or 2, characterized in that the lubricating grease composition has a service temperature range from -60 ° C to + 180 ° C and / or from -50 ° C to + 160 ° C, and / or from - 40 ° C to + 150 ° C and / or from -40 ° C to + 140 ° C and / or from -40 ° C to + 120 ° C.
4. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Anteil des Polyharnstoffverdickers in der erfindungsgemäßen Schmierfettzusammensetzung 1 Gew.% bis 11 Gew.%, noch bevorzugter von 2 Gew.% bis 10 Gew.% und insbesondere von 3 Gew.% bis 9 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung beträgt. 4. Use according to one or more of the preceding claims, characterized in that the proportion of the polyurea thickener in the lubricating grease composition according to the invention is from 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight and in particular from 3% by weight .% to 9% by weight, based in each case on the total weight of the lubricating grease composition.
5. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Polyharnstoffverdicker ein Reaktionsprodukt aus einem Diisocyanat, ausgewählt aus 2,4- Diisocyanatotoluol, 2,6-Diisocyanatotoluol, 4,4'- Diisocyanatodiphenylmethan, 2,4'-Diisocyanatophenylmethan, 4,4'- Diisocyanatodi-phenyl, 4,4'-Diisocyanato-3-3'-dimethylphenyl, 4,4'- Diisocyanato-3,3'-dimethylphenylmethan, die einzeln oder in Kombination verwendet werden können, mit einem Amin der allgemeinen Formel R'2-N-R, oder einem Diamin der allgemeinen Formel R'2-N-R- NR'2, wobei R ein Aryl-, Alkyl- oder Alkylenrest mit 2 bis 22 Kohlenstoffatomen ist und R' identisch oder verschieden ein Wasserstoff, ein Alkyl-, Alkylen- oder Arylrest ist, oder mit Gemischen aus Aminen und Diaminen ist. 5. Use according to one or more of the preceding claims, characterized in that the polyurea thickener is a reaction product of a diisocyanate selected from 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4'-diisocyanatodiphenylmethane, 2,4'-diisocyanatophenylmethane , 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanato-3-3'-dimethylphenyl, 4,4'-diisocyanato-3,3'-dimethylphenylmethane, which can be used singly or in combination with an amine of the general formula R'2-NR, or a diamine of the general formula R'2-NR- NR'2, where R is an aryl, alkyl or alkylene radical with 2 to 22 carbon atoms and R ', identically or differently, is a hydrogen, is an alkyl, alkylene or aryl radical, or with mixtures of amines and diamines.
6. Verwendung nach einem oder mehreren der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Temperatur für einen Zeitraum, von mindestens 10 Minuten, noch bevorzugter mindestens 20 Minuten, noch bevorzugter mindestens 40 Minuten und insbesondere mindestens 60 Minuten aufrechterhalten wird. 6. Use according to one or more of claims 2 to 5, characterized in that the temperature is maintained for a period of at least 10 minutes, more preferably at least 20 minutes, even more preferably at least 40 minutes and in particular at least 60 minutes.
7. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass Oberflächen von Kunststoff enthaltenden Reibpartnern oder von einer Kombination aus metallischen und Kunststoff enthaltenden Reibpartnern und insbesondere von Reibpartnern der vorgenannten Art in Aktuatoren, insbesondere im Automobilbereich geschmiert werden. 7. Use according to one or more of the preceding claims, characterized in that surfaces of friction partners containing plastic or of a combination of metallic and plastic-containing friction partners and in particular of friction partners of the aforementioned type are lubricated in actuators, in particular in the automotive sector.
8. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schmierfettzusammensetzung eine Ölabscheidung gemäß ASTM D 6184-17 (24h / 100°C) von weniger als 12 Gew.%, noch bevorzugter weniger als 10 Gew.% und insbesondere weniger als 6 Gew. % und/oder gemäß ASTM D 6184-17 (24h / 100°C, anschließend 24h/ 110°C) von weniger als 16 Gew.%, noch bevorzugter weniger als 14 Gew.% und insbesondere weniger als 13 Gew.% und/oder gemäß ASTM D 6184-17 (24h / 100°C, anschließend 24h / 110°C, anschließend 24h / 120°C) von weniger als 20 Gew.%, noch bevorzugter weniger als 15 Gew.% und insbesondere weniger als 12 Gew.% aufweist. 8. Use according to one or more of the preceding claims, characterized in that the lubricating grease composition has an oil separation according to ASTM D 6184-17 (24h / 100 ° C) of less than 12% by weight, more preferably less than 10% by weight and in particular less than 6% by weight and / or according to ASTM D 6184-17 (24h / 100 ° C, then 24h / 110 ° C) of less than 16% by weight, more preferably less than 14% by weight and in particular less than 13 % By weight and / or according to ASTM D 6184-17 (24h / 100 ° C, then 24h / 110 ° C, then 24h / 120 ° C) of less than 20% by weight, more preferably less than 15% by weight and in particular less than 12% by weight.
9. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Komplexseife auf Basis von Aluminium die Formel 1 aufweist, wobei R ein aliphatischer Kohlenwasserstoffrest mit 4 bis 28 Kohlenstoffatomen (R = C4-C28) ist. 9. Use according to one or more of the preceding claims, characterized in that the complex soap based on aluminum has the formula 1 has, where R is an aliphatic hydrocarbon radical with 4 to 28 carbon atoms (R = C4-C28).
10. Verwendung nach Anspruch 9, dadurch gekennzeichnet, dass R abgeleitet ist von Fettsäuren, ausgewählt aus der Gruppe bestehend aus Laurinsäure, Palmitinsäure, Myristinsäure, Stearinsäure und Gemischen hiervon. 10. Use according to claim 9, characterized in that R is derived from fatty acids selected from the group consisting of lauric acid, palmitic acid, myristic acid, stearic acid and mixtures thereof.
11. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Anteil der Komplexseife auf Aluminiumbasis in der Schmierfettzusammensetzung von 1 Gew.% bis 11 Gew.%, noch bevorzugter von 2 Gew.% bis 10 Gew.%, und insbesondere von 3 Gew.% bis 9 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung, beträgt. 11. Use according to one or more of the preceding claims, characterized in that the proportion of the aluminum-based complex soap in the lubricating grease composition is from 1% by weight to 11% by weight, more preferably from 2% by weight to 10% by weight, and in particular from 3% by weight to 9% by weight, each based on the total weight of the lubricating grease composition.
12. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Anteil an Komplexseife auf Aluminiumbasis und Polyharnstoffverdicker zusammengenommen von 2 Gew.% bis 22 Gew.%, noch bevorzugter von 4 Gew.% bis 20 Gew.% und insbesondere von 6 Gew.% bis 18 Gew.%, jeweils bezogen auf das Gesamtgewicht der Schmierfettzusammensetzung beträgt. 12. Use according to one or more of the preceding claims, characterized in that the proportion of complex soap based on aluminum and polyurea thickener taken together is from 2% by weight to 22% by weight, more preferably from 4% by weight to 20% by weight and in particular from 6% by weight to 18% by weight, based in each case on the total weight of the lubricating grease composition.
13. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Grundöle Polyalphaolefine, insbesondere metallocene Polyalphaolefine, sowie naphthenbasiche Mineralöle gemäß Klassifizierung nach API Group I sind. 13. Use according to one or more of the preceding claims, characterized in that the base oils are polyalphaolefins, in particular metallocene polyalphaolefins, and naphthenic mineral oils according to the API Group I classification.
14. Verwendung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schmierfettzusammensetzung folgende Zusammensetzung aufweist: 14. Use according to one or more of the preceding claims, characterized in that the lubricating grease composition has the following composition:
55 bis 96 Gew.% Grundöl, 55 to 96% by weight base oil,
1 bis 11 Gew.% Polyharnstoffverdicker, 1 to 11% by weight polyurea thickener,
1 bis 11 Gew.% Komplexseife auf Aluminiumbasis, 1 bis 30 Gew.% Additive, 1 to 11% by weight complex soap based on aluminum, 1 to 30% by weight of additives,
1 bis 30 Gew.% Festschmierstoffe. 1 to 30% by weight of solid lubricants.
EP20800639.5A 2019-12-13 2020-11-03 Use of a lubricating grease composition having a high upper use temperature Pending EP4073213A1 (en)

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