DE3712133A1 - LUBRICANTS OR LUBRICANT CONCENTRATE - Google Patents

Abstract

A lubricant or lubricant concentrate derived from mineral and/or synthetic oils possessing improved lubricating properties, in particular improved load-bearing, sliding and anti-corrosion properties, contains a) one or more mineral and/or synthetic oils as the basic oil, b) at least one (OH)4 to (OH)8 alcohol with at least one quaternary carbon atom and at least one ester bond in the molecule, and having a density d20 of at least 0.900 and an enthalpy H of at least 350 kcal/kg, c) at least one asymmetrical organo-metallic compound, d) at least one phosphorus carrier, e) at least one sulphur carrier, and f) other usual additives.

Description

The invention relates to a new lubricant or lubricant concentrate based on mineral oil and / or synthetic oil with improved lubricating properties, especially improved Load bearing, anti-slip and anti-corrosion properties.

Numerous procedures have been used over the past few decades and lubricant systems designed to move machine parts to reduce friction and wear, thus energy and spare parts costs to lower and the life of the lubricants and extend materials. The ideal lubricant the "Lifetime Lubricant", which is also becoming more and more pressing meeting ecological demands.

On the Werge to long-term and high-performance lubricants, -Lubrication systems and -Lubrication was in the first Stage developed the so-called chemical wear lubrication. With their help, chemical could be applied reactive cover layers on surfaces or by incorporation chemically reactive compounds in basic lubricants the metal-metal contact due to salt formation on the surfaces the micro mountains of moving parts are largely prevented will. In this way, the seizure of the Machine parts can be prevented. At the same time, however ongoing wear and tear due to shear off of the salt layers promoted in the movement of the metal parts against each other. The service life of the materials therefore remained proportionate short. In a further stage, solid lubricants developed that inserted between the moving metal parts were such. B. graphite, MoS₂, TiO₂, Ca₃ (PO₄) ₂, Teflon and the like, which are used as lubricious cover layers, suspensions, Pastes or fats were introduced. Thereby  the friction partners are better separated from each other and their resilience increases. With centripetal movements higher peripheral speed and at a higher temperature however, the solid lubricants and carrier media separate sooner or later from each other due to their different specific densities. The long-term lubrication were this sets limits. In a further step succeeded it, from chemical complexes dissolved in a lubricant out suitable metal cations on rubbing surfaces to apply during operation. They educate there Pressure and temperature of the friction partners with the eutectics Metal edge layers smoothing the roughness valleys fill in and the roughness peaks partly tribochemically, partially flatten microplastically. The anionic part of the organometallic compounds forms in situ lubricating and adhesive reaction layers on the freshly formed eutectoid friction surfaces.

In addition to a too long running-in phase, a too high one Coefficient of friction and abrasion has these Lubrication systems control the reaction process as proven problematic.

Either one came across material-independent eutectics and reaction layers, the fine removal of production-related No unevenness in tight fits more sufficient, so that overload areas at these points emerged that led to later metal outbreaks led to the sliding surfaces, or it became the aggressive component of the organometallic compounds reinforced and this got you back into the phase of chemical wear lubrication with a too high removal rate and thus too short lifespan.  

DE-PS 9 41 678, for example, includes lubricating oils containing soluble reaction products of phosphorus pentasulfide with liquid or solid aliphatic hydrocarbons or terpene hydrocarbons known. Out DE-PS 9 23 984 a lubricating oil is known, the metal-containing Alkylphenol sulfide esters in combination with zinc sulfonates contains. DE-AS 14 44 892 is a lubricating oil known to be a salt of an aromatic zinc dithiophosphate and a zinc carboxylic acid salt in the presence of Contains water. While the first two products The latter should represent lubricating oil detergents Prevent the corrosion of silver bearing surfaces. From DE-AS 12 96 730 a lubricating oil is known, the one Salt of a substituted succinic acid optionally contains together with a salt of an alkylated or esterified Phosphoric acid. It is an antioxidant with detergent effect. From the DE-AS 12 71 878 is a combination of dithiophosphate and Dithiophosphinate salts known. From DE-OS 15 94 555 are cutting oils with a content of free sulfur, one Dialkyldithiophosphate and a chlorinated hydrocarbon known. From US-PS 34 62 367 are lubricating oils with a content of zinc or antimodithiocarbamate known. Lubricating oils are known from US Pat. No. 2,758,087, which contain a sulfur-phosphorus compound by Reaction of phosphorus pentasulfide with an olefin higher temperature is obtained and the zinc phthalate contains. All these known lubricating oil additives are sufficient  no longer meet today's requirements, in particular they lead excessive oxide deposits in the area of the lubrication point and cause excessive wear. From US-PS 27 34 865 it is known a Use lubricating oil additive that is made from a dithiophosphate the alkaline earth salts in combination with a complex reaction product from phosphorus sulfides, tall oil fatty acid alcohol esters, Zinc chloride and barium hydroxide is formed. The coefficients of friction and abrasion values that can be achieved are however, too high for today's requirements, beyond that its surface pressure value is too low. From the US PS Lubricating oil additives 27 34 864 are also known, which consist of a dithiophosphate of the alkaline earth salts in combination with a complex reaction product from phosphor sulfides, Wool fat and alcohol esters are formed. The undefined Product contains considerable amounts of barium and zinc. Such a lubricating oil additive is already unbearable Smell that also comes into contact with it People at risk of health, but not in practice usable. From DE-PS 19 54 452 lubricants are on the base of mineral oil or synthetic oil known, in addition to the mineral or synthetic oil as an ester epoxidized fatty acid with 10 to 18 carbon atoms with one or polyhydric alcohols, an alkyl, aralkyl or aryl dithiophosphate of zinc, lead, tin, tungsten, molybdenum, niobium or lanthanum and optionally a sulfur phosphorus compound contain. From DE-PS 21 08 780 are lubricants based on mineral or synthetic oil or lubricant concentrates known, in addition to one with alkyl, aryl or Aralkyl groups esterified lead, tungsten, molybdenum and / or Vanadium dithiophosphate or at least one zinc dialkyldithiophosphate and a metal-free sulfur-phosphorus compound contain. These last-mentioned lubricants, too have found widespread use, meet the requirements the modern long-term and high-performance lubricants be asked, no longer in all matters. Your coefficient of friction and abrasion are too high, their shelf life is insufficient in long-term use, the complaint rate is too high in the field of lubrication.

The object of the invention was therefore to provide a new lubricant or lubricant concentrate based on mineral or to create synthetic oil that with respect to its Lubricating properties, in particular its friction and wear properties, is further improved, thus the energy and the need for spare parts is noticeably reduced and therefore also meets the highest requirements.

It has now been found that this object can surprisingly be achieved according to the invention in that a mineral and / or synthetic oil in addition to the usual additives has at least one 4- to 8-valent alcohol with at least one quaternary carbon atom and at least one ester compound in the molecule with a density d 2 of at least 0.900 and an enthalpy H of at least 350 kcal / kg, at least one asymmetric organometallic compound, at least one phosphorus carrier and at least one sulfur carrier are added.

The invention relates to a new lubricant or Lubricant concentrate based on mineral and / or Synthetic oil, which is characterized in that it contains

• a) one or more mineral and / or synthetic Oils as base oil,
• b) at least one 4- to 8-valent alcohol with at least one quaternary carbon atom and at least one ester bond in the molecule with a density d ₂₀ of at least 0.900 and an enthalpy H of at least 350 kcal / kg,
• c) at least one asymmetric organometallic Connection,
• d) at least one phosphorus carrier and
• e) at least one sulfur carrier and
• f) other usual additives.

The lubricants or lubricant concentrates according to the invention have compared to the known lubricants or lubricant concentrates significantly improved properties, especially regarding friction and wear, and thus a reduced need for energy and spare parts on. This is believed to be due to this is that when used in the rubbing and sliding area metallic glass surfaces made of amorphous solidified metal melts, which no longer have metal crystal lattice structures exhibit, arise. The glassy smooth friction and Sliding surfaces with the lubricant according to the invention or lubricant concentrate are likely to be generated, significantly improve the entire lubrication process since the Coefficient of friction and with it the abrasion, the oxidation and corrosion can be significantly reduced. Also the so-called Fretting corrosion is caused by the lubricant according to the invention or lubricant concentrate prevented. In addition, that the lubricants or lubricant concentrates according to the invention are extremely environmentally friendly as they are not Lead, no sulphurized whale sperm oil and hardly any phosphorus contain. This has fish tests Bacterial growth tests with the invention Lubricants or lubricant concentrates carried out were shown. It was also found that it already 60% biodegradable within 3 to 4 months in normal soil are, so that they are also extremely environmentally friendly can be designated. They are particularly well suited for use in homokinetic joints for vehicles, d. H. small joints with high speed and high Load, and they come up with what is considered the ideal lubricant "Lifetime Lubricant" much closer than all of the previous ones known lubricants. In addition, the invention used, quaternary carbon atoms containing polyol ester Connections are thermally very stable and therefore high operating temperatures allow up to 300 ° C. You open up hence the possibility of permanent lubrication of the most highly stressed Motors, turbines, roller bearings, constant velocity joints and other high performance machine elements.  

Under the expression "lubricant or Lubricant concentrate based on mineral and / or Synthetic oil "are both lubricating oils and greases to understand on a mineral and / or synthetic oil basis.

Among compounds containing quaternary carbon atoms are to be understood here as connections in which the four main valences of at least one carbon atom each Molecule is occupied by four carbon atoms. Examples such compounds are mono-, di- and trimeric Pentaerythritol esters, other polyol esters, pentaerythritol ethoxy esters and telomeric acid pentaerythritol esters and the corresponding ethoxylated esters.

The lubricants or lubricant concentrates according to the invention have compared to the known lubricants or Lubricant concentrates have significantly improved properties on how the examples below show. The glassy smooth produced by the lubricant of the invention Friction and sliding surfaces save drive energy and reduce the coefficient of friction per se and by building a very adhesive Boundary lubricating film that has an elastohydrodynamic lubrication even with point loads. This will the friction temperature of the lubricant and lubrication point is reduced, the oxidation resistance of both extended and the metallic friction partner less specific alternating load and exposed to high temperatures.

Overall, these effects make the wear extraordinary decreased and the life of the friction partner and of the lubricant increased significantly. According to the invention these improvements within a very wide viscosity range achieved so that now also oils with lower Viscosity can be used where previously high or medium viscosity grades are considered essential were, for example, in transmissions, differential gears or turbine reduction gears. Also allowed the thermal resistance of the lubricant according to the invention or lubricant concentrate its use Lubrication points of high operating temperature, for example in diesel engines and aviation turbines.  

According to a preferred embodiment of the invention contains the lubricant or lubricant concentrate as a component (b) mono-, di- or tripentaerythritol, its alcoholic Hydroxyl group (s) by an unbranched or branched Alkyl, aralkyl or aryl group with 6 to 18 carbon atoms, preferably 6 to 12 carbon atoms, in particular 8 to 12 carbon atoms, esterified or ethoxy-esterified is (are).

According to a further preferred embodiment of the invention it contains as component (b) a mono-, di-, tri- or Tetraesters of pentaerythritol.

According to a further preferred embodiment of the invention contains the lubricant or lubricant concentrate additionally a component with at least one free one Hydroxyl group.

The lubricant or lubricant concentrate according to the invention contains component (b) according to a further preferred Embodiment of the invention in an amount of 0.1 up to 40% by weight, preferably from 0.1 to 20% by weight, in particular from 1 to 12% by weight, especially from 2 to 6% by weight, based on the weight of the mineral and / or synthetic oil.

According to a further preferred embodiment of the invention contains the lubricant or lubricant concentrate according to the invention as component (b) an ester and / or ethoxylated ester derivative of mono-, di- or tripentaerythritol and / or a telomeric acid pentaerythritol ester or an ethoxylated derivative thereof.

The lubricant or lubricant concentrate according to the invention preferably contains beet oil, natural oil and / or a synthetic oil with a viscosity in the range from 1.0 mPa · s at 20 ° C to 2 · 10 C mPa · s at 20 ° C. Particularly preferred is the use of a mineral oil with a viscosity of 1.0 mPa · s at 20 ° C to 540 mPa · s at 50 ° C as a natural oil and the use of an aromatic or aliphatic dicarboxylic acid ester, in particular poly- α- olefin dicarboxylic acid ester, especially butyl ester , With a molecular weight in the range of 1000 to 3000, preferably of diisocyanate phthalate, trimethyladipate and dioctyl sebacate, a polyisobutylene with a molecular weight of 1000 to 100,000 and a viscosity of 200 to 43,000 mPa · s at 100 ° C, a polymethacrylate with a viscosity of 1000 mPa · s at 100 ° C, a non-water-soluble polyglycol with a viscosity of 5 to 60 mPa · s at 100 ° C, an isoparaffin oil and / or alkylbenzene with a flash point of over 50 ° C and a viscosity in the range of 1.0 mPa · s at 20 ° C to 2,000,000 mPa · s at 20 ° C and a telomeric acid ester, preferably a neopentyl glycol or trimethylol propane ester Telomeric acid.

The lubricant according to the invention contains as a further additive or lubricant concentrate, preferably a sulfur carrier, in particular a thiazole, at least one metal dialkyldithiocarbamate and / or a phosphorus carrier, in particular an organophosphite, preferably a dialkylaryl phosphite, especially didecylphenyl phosphite or didodecylphenyl phosphite, and / or a Metal dialkyldithiophosphate.

The sulfur carrier is preferably in an amount of 0.5 to 10 wt .-%, in particular from 1 to 3 wt .-%, in the Contain lubricant or lubricant concentrate, while it preferably contains the phosphorus carrier in an amount of 0.1 to 10% by weight, in particular 0.1 to 5% by weight, especially from 0.5 to 2% by weight.

The invention can be used as further conventional additives Lubricant or lubricant concentrate according to a preferred embodiment of the invention conventional antioxidants, Metal deactivators, detergents, dispersants, Antifoam and / or viscosity index improver contain.  

Further features and advantages of the invention result from the following description.

The polyol esters preferably used according to the invention Compounds with at least one quaternary carbon atom in the Molecule includes the following compounds:

• a) Esters and ethoxylated esters of mono-, di- and tripentaerythritol.
  The underlying mono- and dipentaerythritol has the structure: in which the hydroxyl groups are partially or fully esterified, the ester groups of which are preferably straight or branched alkyl, aralkyl or aryl groups having 6 to 18, preferably 8 to 12, carbon atoms.

These connections are easy and numerous Representatives of these compounds are commercially available for example from the company Ciba-Geigy the trade names Reolube LP 3600 (pentaerythritol tetrapelargonate), Reolube LPE 504 (pentaerythritol tetraoctyl ester), Reolube LPE 602 (pentaerythritol tetraheptyl ester), from the Akzo company under the trade name Ketjenlube 12 (pentaerythritol tetradecyl / dodecyl ester with statistical  C₁₀ / C₁₂ distribution), and from Henkel AG under Trade name Edenor Ke 230 (pentaerythritol tetraisopalmitic acid ester) and pentaerythritol tetraisostearyl acid esters.

Examples of suitable pentaerythritol esters are pentaerythritol monohexyl ester, pentaerythritol monooctyl ester, Pentaerythritol mononony ester, pentaeryhtritol monodecyl ester, Pentaerythritol monododecyl ester, pentaerythritol monomyristyl ester, Pentaerythritol monohexadecyl ester, pentaerythritol monostearyl esters, pentaerythritol monooleylesters, pentaerythritol monoisostearyl and isopalmitic acid esters; the corresponding dihexyl, dioctyl, dinonyl, didecyl, Didodecyl, dimyristyl, dihexadecyl, distearyl, Dioleyl, diisostearyl and diisopalmitic acid esters of Pentaerythritol; the corresponding trihexyl, trioctyl, Trinonyl, tridecyl, tridodecyl, trimyristyl, trihexadecyl, Tristearyl, trioleyl, triisostearyl and triisopalmitic acid esters of pentaerythritol, as well as the corresponding Tetrahexyl, tetraoctyl, tetranonyl, tetradecyl, Tetradodecyl, tetramyristyl, tetrahexadecyl, tetrastearyl, Tetraoleyl, tetraisostearyl and tetraisopalmitic acid esters of pentaerythritol.

• b) Pentaerythrittelomeric acid derivatives with the following basic structure where mean: T = telomer, R = T or alkyl

As is well known, telomeric acids are compounds with relatively high molecular weights and  long chain, star-like branched structures that can be esterified in the usual way and their esters are valuable Represent lubricants (commercial product Kortacid T from Akzo Chemie).

Mineral oils which can be used according to the invention are all customary Mineral oils from isoparaffin oil with a viscosity of 1.0 mPa · s at 20 ° C over thin spindle oil with a viscosity of 12 mPa · s at 20 ° C up to highly viscous bright stock and cylinder oil with a viscosity of 540 mPa · s at 50 ° C.

Many of the synthetic oils that can be used according to the invention are commercially available, for example from BP under the trade name "Hyvis 10" (a polyisobutylene with a viscosity at 100 ° C of 200 mPa · s), "Hyvis 200" (a polyisobutylene with a viscosity at 100 ° C of 4300 mPa · s) and "Hyvis 2000" (a polyisobutylene with a viscosity at 100 ° C of 43,000 mPas), Viscoplex 4-95 from Röhm (a polymethacrylate) with a Viscosity of 1000 mPa · s at 100 ° C, Ucolub N9 with a Viscosity of 5.7 mPa · s at 100 ° C, Ucolub N36A with a Viscosity of 18 mPa · s at 100 ° C, Ucolub N120A with a Viscosity of 55 mPa · s at 100 ° C (all insoluble in water Polyglycols) from Union Carbide, and "Isopar J" from Esso (an isoparaffin oil) with one Viscosity at 20 ° C of 1.0 mPa · s.

In those that can be used according to the invention as phosphor supports Organophosphorus compounds are compounds of the formula

where R is a straight-chain, branched or cyclic alkyl group with 6 to 12 carbon atoms or in the o- or p-position with a lower alkyl radical 1 to 6 carbon atoms substituted phenyl group mean.

Preferred examples of organophosphorus compounds of the above Formula are monodecyl diphenyl phosphite, didecylphenyl phosphite  Triphenyl phosphite, dioctyl phenyl phosphite, Dihexyl phenyl phosphite, diisodecyl phenyl phosphite, Diisooctyl-phenyl-phosphite, didecyl-o-methylphenyl- phosphite and didecyl-p-methylphenyl phosphite.

The metal dialkyldithiocarbamates which can be used according to the invention as a sulfur carrier are compounds of formula

wherein Me is a metal from the group copper, silver, zinc, Cadmium, boron, titanium, zirconium, tin, lead, vanadium, tantalum, Antimony, Chromium, Molybdenum, Tungsten, Manganese, Cobalt and Nickel, preferably boron, nickel, cobalt or molybdenum, means.

In the invention both as a sulfur carrier and metal dialkyldithiophosphates which can be used as phosphor supports it is compounds of the formula

where Me for a metal from the group copper, silver, Zinc, cadmium, boron, titanium, zirconium, tin, lead, vanadium, Tantalum, antimony, chromium, molybdenum, tungsten, manganese, cobalt and nickel, preferably for zinc, nickel, titanium, vanadium, Molybdenum, tungsten and manganese.

The alkyl group in the above-mentioned metal dialkyldithiocarbamates  and metal dialkyldithiophosphates each contain preferably 4 to 8 carbon atoms, so that the above Metal salts are still soluble in the commercially available base oils are. Examples of particularly advantageous alkyl groups belong the n-, i- and tert-butyl group, the n- and i-amyl group, the n- and i-hexyl group, the n- and i-heptyl group and the 2-ethylhexyl group. Are very particularly preferred the i-butyl group, the n- and amyl group and the 2-ethylhexyl group.

Examples of metal dialkyldithiocarbamates which can be used according to the invention with particular advantage are the following:
Copper dialkyldithiocarbamates and copper bisdialkyldithiocarbamates; Silver dialkyldithiocarbamates; Zinc and cadmium bisdialkyldithiocarbamates; Boron trisdialkyldithiocarbamate; Titanium, zirconium, tin and lead tetrakisdialkyldithiocarbamates and tin and lead bisdialkyldithiocarbamates; Antimony, vanadium and tantalum dialkyldithiocarbamates, tetrakis and pentakis dialkyldithiocarbamates and the dialkyldithiocarbamates in which these metals are present in mixed oxidation states; Chromium, chromium tris, chromium tetrakis and chromium hexakis dialkyldithiocarbamates, molybdenum and tungsten tetrakis, hexakis and oxybis and oxytetrakis dialkyl dithiocarbamates; Manganese bis, tris and hexakisdialkyldithiocarbamates; and cobalt and nickel bis and tris dialkyldithiocarbamates.

Among these compounds, those are particularly preferred Bortrisdialkyldithiocarbamate, the Nickeltrisdialkyldithiocarbamate and the molybdenum tetrakis and molybdenum oxytetrakisdialkyldithiocarbamates.

Metalldialkyldithiophosphate, the invention with particular advantage can be used are the Dialkyldithiophosphates of the same metals in the same Oxidation levels as described above for the metal dialkyldithiocarbamates have been enumerated.  

Zinc bisdialkyldithiophosphates are particularly advantageous, Nickel bis and trisdialkyl dithiophosphates, titanium and vanadium tetrakis dialkyldithiophosphate, molybdenum and Tungsten tetrakisdialkyldithiophosphate and molybdenum and Tungsten oxytetrakisdialkyldithiophosphate.

Particularly preferred representatives of the metal dialkyldithiocarbamates used according to the invention are
Bortrisdiisobutyldithiocarbamat, Bortrisdiamyldithiocarbamat, Bortrisdi-2-ethylhexyldithiocarbamat, Nickeltrisdiisobutyldithiocarbamat, Nickeltrisdiamyldithiocarbamat, Nickeltrisdi-2-ethylhexyldithiocarbamat, Molybdänoxytetrakisdi-2-ethylhexyldithiocarbamat Molybdänoxytetrakisdi-2-ethylhexyldithiocarbamat and Kobaltbisdiisobutyldithiocarbamat.

Particularly preferred representatives of the used according to the invention Metal dialkyldithiophosphates are zinc bisdi-2-ethylhexyldithiophosphate, Nickel bis and trisdi 2-ethylhexyl dithiophosphate, Titanium and vanadium tetrakisdi-2-ethylhexyl dithiophosphate as well as molybdenum and tungsten tetrakis and Molybdenum oxy- and tungsten oxytetrakisdi-2-ethylhexyldithiophosphate.

The invention is illustrated by the following examples, without being limited to it.

In the examples described below, respectively commercially available lubricating oils or greases with the specified Compositions once with and once without the invention Lubricant concentrate on its lubricating properties examined and the results achieved compared with each other.

The results obtained are in the in the respective examples shown diagrams graphically.  

A circular disk was used to carry out the tests made of stainless steel with a diameter of 23 mm and one Thickness of 10 mm used, on the surface of a drop of the lubricating oil or grease to be examined in each case was applied. On the place where the lubricating oil or grease was a ball from the same Stainless steel with a diameter of 10 mm applied, which due to their stress put pressure on the surface who exercised metal disc. The metal ball was with a Frequency of 50 Hz over an amplitude of 1 mm for 60-180 min under load on the surface of the metal disc and moved, taking the load during the experiment within the range of 50 to 300 N and the temperature were varied within the range of 50 to 150 ° C (SRV = vibration-friction-wear device from Optimol GmbH).

This is due to the friction between the loaded ball and the surface of the metal disc within the test period generated wear profile transverse to the direction of oscillation the ball was removed using a suitable recorder recorded, the ones given below Diagrams have been obtained on the ordinate the amount of wear as the difference between the highest and the lowest point of the surface profile of the metal disc depending on the scanning distance of the surface of the Metal disc is shown on the abscissa.

In the diagrams below, a profile depth on the ordinate of 1 cm corresponds to a real profile depth in the surface of the metal disc of 1 µm, with the exception of diagram B ′ of Example 2. Therein, a profile depth of 1 cm corresponds to a real profile depth of 2.5 µm.

The diagrams were recorded under otherwise identical conditions (load on the ball 50 to 300 N, friction frequency 50 Hz, temperature 50 to 150 ° C, friction amplitude 1 mm, test duration 1 to 3 h). The coefficients of friction given below the diagrams ( R _K max = maximum coefficient of friction; R _K d = average coefficient of friction over 98% of the coefficient of friction curve) were also measured with the SRV device mentioned above. Unless stated otherwise, a product with the following composition was used as the lubricant concentrate according to the invention in all experiments:

50% C₁₀-C₁₈ pentaerythritol ester with quaternary carbon atom 20% copolymer of α- olefin esters 9.5% trimethyl adipate 2.5% dialkylarylphosphite 9% metal dialkyldithiophosphate / metal dialkyldithiocarbamate 7% thiazole derivative phenic oxidizing inhibitor 2% as steric oxidin inhibitor

Example 1

It became a highly viscous lubricating oil with a viscosity of 2200 mPa · s at 50 ° C of the following composition manufactured and tested:

Trimethyladipic acid didecyl ester 34% Polyisobutylene 43 000 mPas / 100 ° C32% Lubricant drag substance 6% Lubricant concentrate according to the invention 28%

The lubricant concentrate according to the invention was used in the comparative product omitted.

Both products were tested for 1 hour at a temperature of 150 ° C and a load of 200 N under identical conditions. The results obtained are shown graphically in the following diagrams A (according to the invention) and A ' (according to the prior art).

The lubricant additive according to the invention resulted a profile depth of 0.80 µm (average of two measurements). Without the lubricant additive according to the invention, this resulted  a profile depth of 1.68 (average of two measurements).

Example 2

It became a medium viscosity lubricating oil with a viscosity from 190 to 200 mPa · s at 50 ° C of the following composition produced:

polymeric α- olefin ester 12% trimethyl adipate didecyl ester 36% polyisobutylene 4300 mPas / 100 ° C 18% lubricant entrainer 6 inventive lubricant concentrate 28%

The lubricant concentrate according to the invention was used in the comparison product omitted.

The tests were carried out under identical conditions for 1 hour at a temperature of 150 ° C. and a load of 200 N. The results shown graphically in the following diagrams B and B 'were achieved.

While using the lubricant according to the invention the profile depth at 0.875 µm (average of two measurements) was the profile depth when using the Comparative product 13.98 µm.

Example 3

A lubricating oil with an average viscosity of 120 to 150 mPa · s at 50 ° C with the composition given below produced:

high-viscosity α -Olefinester copolymer 4% medium-viscosity α -Olefinesterpolymeres12% Trimethyladipinsäuredidecylester34 Polyisobtuylen% 200 mPa · s / 100 ° C 12% lubricant drag substance 6% according to the invention Konzentrat32%

The lubricant concentrate according to the invention was used in the comparative product omitted.

The tests were carried out under identical conditions for 1 hour at a temperature of 150 ° C. and a load of 200 N. The results obtained are shown graphically in the following diagrams C (according to the invention) and C ' (comparative product).

The profile depth when using the lubricating oil according to the invention was 1.12 µm (average of three measurements). The Profile depth when using the comparison product was 3.48 µm.

Example 4

It became a highly viscous adhesive and high temperature lubricating oil with a viscosity of 15,000 mPa · s at 50 ° C with the composition specified below:

Trimethyladipic acid didecyl ester 29% Polyisobutylene 43 000 mPas / 100 ° C52% Lubricant concentrate according to the invention 19%

As a comparison product, the same lubricating oil was used without that Lubricant concentrate according to the invention used.

The experiments were carried out for 1 hour at a temperature of 150 ° C and a load of 200 N under identical conditions carried out.

When using the lubricating oil according to the invention, the profile depth was 0.80 μm (average value from three measurements), while the profile depth when using the comparison product was 1.57 μm, as the following diagrams D (according to the invention) and D ′ (comparison product) show.

Example 5

A high-performance gear oil SAE 85/90 was with the invention Add 10% by weight of monopentaerythritol tetraester or tested without this addition.

The comparative experiments were carried out at one temperature for 1 hour of 90 ° C and with a load of 200 N under identical Conditions carried out.

In the case of the product according to the invention, one resulted Profile depth of 0.85 µm (average of two measurements), while in the comparison product the profile depth is 1.02 µm (Average of two measurements) was like the two following diagrams show:

Example 6

It became a grease for multi-purpose lubrication heavily loaded Gears and constant velocity joints of the following Composition made:  

Mineral oil70% Consistency generator based on lithium stearate 9% Lubricant concentrate according to the invention 21%

As a comparison product, the same grease was used without the lubricant concentrate according to the invention, but with 3 wt .-% molybdenum disulfide / graphite mixture used as an additive. The experiments were carried out for 3 hours at a temperature of 50 ° C and a load of 300 N carried out otherwise identical conditions.

When using the grease according to the invention, the profile depth was 0.95 μm (average value from three measurements), while the profile depth when using the comparison product was 1.63 μm (average from three measurements), as the following diagrams F (according to the invention) and F ′ ( Comparative product) show.

While the invention has been described above with reference to preferred ones Embodiments explained, but it is of course, that it is not limited to but that this in an obvious for the expert Modified and modified in many ways can be without the scope of the present Invention is left.

Claims (16)

1. Lubricant or lubricant concentrate based on mineral oil and / or synthetic oil, characterized in that it contains

• a) one or more mineral and / or synthetic oils as base oil,
• b) at least one 4- to 8-valent alcohol with at least one quaternary carbon atom and at least one ester bond in the molecule with a density d ₂₀ of at least 0.900 and an enthalpy H of at least 350 kcal / kg,
• c) at least one asymmetric organometallic compound,
• d) at least one phosphorus carrier and
• e) at least one sulfur carrier and
• f) other usual additives.

2. Lubricant or lubricant concentrate according to claim 1, characterized in that it is a component (b) contains mono-, di- or tripentaerythritol, whose alcoholic hydroxyl group (s) by a unbranched or branched alkyl, aralkyl or Aryl group of 6 to 18 carbon atoms, preferably 6 to 12 carbon atoms, especially 8 to 12 carbon atoms, is esterified or ethoxy-esterified (are). 3. Lubricant or lubricant concentrate according to claim 1 or 2, characterized in that it as Component (b) a mono-, di-, tri- or tetraester of Contains pentaerythritol. 4. Lubricant or lubricant concentrate after one of claims 1 to 3, characterized in that it additionally a component with at least one free one Contains hydroxyl group. 5. Lubricant or lubricant concentrate after one of claims 1 to 4, characterized in that it component (b) in an amount of 0.1 to 40 % By weight, preferably from 0.1 to 20% by weight, in particular from 1 to 12% by weight, especially from 2 to 6% by weight, based on the weight of the mineral and / or synthetic oil, contains. 6. Lubricant or lubricant concentrate after one of claims 1 to 5, characterized in that it as component (c) at least one metal dialkyldithiocarbamate and / or at least one metal dialkyldithiophosphate  contains. 7. Lubricant or lubricant concentrate according to claim 6, characterized in that it is a component (c) at least one dialkyldithiocarbamate Metals boron, nickel, cobalt and molybdenum and / or at least one dialkyldithiophosphate of the metals zinc, Nickel, molybdenum, tungsten, titanium, vanadium and manganese with 4 to 8 carbon atoms in the alkyl group contains. 8. Lubricant or lubricant concentrate according to claim 7, characterized in that it is a metal dialkyldithiocarbamate Borotrisdiisobutyldithiocarbamate and / or boron trisdi-2-ethylhexyldithiocarbamate in Combination with nickel trisdiisobutyldithiocarbamate, Nickel trisdiamyl dithiocarbamate and / or nickel trisdi 2-ethylhexyldithiocarbamate and / or as metal dialkyldithiophosphate Zinc bisdi-2-ethylhexyldithiophosphate, Nickel trisdi-2-ethylhexyl dithiophosphate, titanium tetrakis di-2-ethylhexyl dithiophosphate, vanadium tetrakis 2-ethylhexyl dithiophosphate, molybdenum tetrakis or Molybdenum oxytetrakisdi-2-ethylhexyldithiophosphate, Tungsten tetrakis or tungsten oxytetrakisdi-2-ethyl contains hexyldithiophosphate. 9. Lubricant or lubricant concentrate after one of claims 1 to 8, characterized in that component (c) in an amount of 0.1 to 10% by weight, preferably from 0.1 to 5% by weight, in particular from 0.1 to 3% by weight. 10. Lubricant or lubricant concentrate after one of claims 1 to 9, characterized in that it as component (d) an organophosphorus compound,  preferably a dialkylaryl phosphite, a monoalkyl diaryl phosphite, a trialkyl or triaryl phosphite, the alkyl group being unbranched, branched or cyclic and preferably contains 8 to 12 carbon atoms and the aryl group is preferably one in o- or p- Position by an aryl radical with 1 to 6 carbon atoms represents substituted phenyl radical, especially didecylphenyl phosphite or didodecylphenyl phosphite, contains. 11. Lubricant or lubricant concentrate after one of claims 1 to 10, characterized in that component (d) in an amount of 0.1 to 5 % By weight, preferably from 0.5 to 2% by weight. 12. Lubricant or lubricant concentrate after one of claims 1 to 11, characterized in that it contains a thiazole as component (e). 13. Lubricant or lubricant concentrate after one of claims 1 to 12, characterized in that it component (e) in an amount of 0.5 to 10 % By weight, preferably from 1 to 3% by weight. 14. Lubricant or lubricant concentrate after one of claims 1 to 13, characterized in that it as component (a) beet oil, natural oil and / or Synthetic oil with a viscosity in the range of 1.0 mPa · s at 20 ° C to 2 × 10⁶ mPa · s at 20 ° C contains. 15. Lubricant or lubricant concentrate according to claim 14, characterized in that it is a mineral oil with a viscosity of 1.0 mPa · s at 20 ° C to 540 mPa · s at 50 ° C and / or as a synthetic oil an aromatic or aliphatic dicarboxylic acid esters, in particular poly- a- olefin-dicarboxylic acid esters, especially butyl esters, with a molecular weight in the range from 1000 to 3000, preferably diisodecyl phthalate, di-trimethyl adipate and dictyl sebacate, a polyisobutylene with a molecular weight of 1000 to 100 000 and a viscosity of 200 000 mPa · s at 100 ° C, a polymethacrylate with a viscosity of 1000 mPa · s at 100 ° C, a non-water-soluble polyglycol with a viscosity of 5 to 60 mPa · s at 100 ° C, an isoparaffin oil and / or alkylbenzene with a flash point above 50 ° C and a viscosity in the range of 1.0 mPa · s at 20 ° C to 2,000,000 mPa · s at 20 ° C and / or a telomeric acid ester, preferably a neopenty lglycol or trimethylolpropane ester of telomeric acid. 16. Lubricant or lubricant concentrate after one of claims 1 to 15, characterized in that it as component (f) one or more antioxidants, Metal deactivators, detergents, dispersants, Antifoam and / or viscosity index improver contains.