US20110086784A1 - Lubricant - Google Patents
Lubricant Download PDFInfo
- Publication number
- US20110086784A1 US20110086784A1 US12/743,885 US74388508A US2011086784A1 US 20110086784 A1 US20110086784 A1 US 20110086784A1 US 74388508 A US74388508 A US 74388508A US 2011086784 A1 US2011086784 A1 US 2011086784A1
- Authority
- US
- United States
- Prior art keywords
- compounds
- lubricant
- general formula
- solid bodies
- replaced
- 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.)
- Abandoned
Links
- 0 *C1=O[H]OC(C2=CC=C([1*])C=C2)=C1.CC Chemical compound *C1=O[H]OC(C2=CC=C([1*])C=C2)=C1.CC 0.000 description 9
- NDQNZNIGFYEWJM-SZLQFXKXSA-L C.C.CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCC1=O[Zn]2(OC(C3=CC=C(CC)C=C3)=C1)OC(C1=CC=C(CC)C=C1)=CC(CCCCCC)=O2.CCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1.[H]1OC(C2=CC=CC=C2)=CC(C2=CC=CC=C2)=O1 Chemical compound C.C.CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCC1=O[Zn]2(OC(C3=CC=C(CC)C=C3)=C1)OC(C1=CC=C(CC)C=C1)=CC(CCCCCC)=O2.CCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1.[H]1OC(C2=CC=CC=C2)=CC(C2=CC=CC=C2)=O1 NDQNZNIGFYEWJM-SZLQFXKXSA-L 0.000 description 1
- FNHRWMDLMODXMN-UHFFFAOYSA-N CC(=O)C1=CC=C(C)C=C1.CCCCCCCCOC(=O)OCCCCCCCC.CCCCCCCCOC1=O[H]OC(C2=CC=C(C)C=C2)=C1 Chemical compound CC(=O)C1=CC=C(C)C=C1.CCCCCCCCOC(=O)OCCCCCCCC.CCCCCCCCOC1=O[H]OC(C2=CC=C(C)C=C2)=C1 FNHRWMDLMODXMN-UHFFFAOYSA-N 0.000 description 1
- QFHPWIORVNSTSL-UHFFFAOYSA-N CC(=O)C1=CC=C(C)C=C1.CCCCOC1=CC=C(C2=CC(CCCCCCCCC3=O[H]OC(C4=CC=C(CCCC)C=C4)=C3)=O[H]O2)C=C1.CCOC(=O)CCCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1 Chemical compound CC(=O)C1=CC=C(C)C=C1.CCCCOC1=CC=C(C2=CC(CCCCCCCCC3=O[H]OC(C4=CC=C(CCCC)C=C4)=C3)=O[H]O2)C=C1.CCOC(=O)CCCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1 QFHPWIORVNSTSL-UHFFFAOYSA-N 0.000 description 1
- LABQEMCPTKCARW-UHFFFAOYSA-N CCC1=CC=C(C(C)=O)C=C1.CCCCCCC(=O)OCC.CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 Chemical compound CCC1=CC=C(C(C)=O)C=C1.CCCCCCC(=O)OCC.CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 LABQEMCPTKCARW-UHFFFAOYSA-N 0.000 description 1
- NFGVVKOTCDDABY-UHFFFAOYSA-N CCC1=CC=C(C2=CC(CCCCC3=O[H]OC(C4=CC=C(CC)C=C4)=C3)=O[H]O2)C=C1.CCCCCCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1.CCOC(=O)CCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 Chemical compound CCC1=CC=C(C2=CC(CCCCC3=O[H]OC(C4=CC=C(CC)C=C4)=C3)=O[H]O2)C=C1.CCCCCCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1.CCOC(=O)CCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 NFGVVKOTCDDABY-UHFFFAOYSA-N 0.000 description 1
- GZGLYZDNUWGMEO-UHFFFAOYSA-N CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 Chemical compound CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1 GZGLYZDNUWGMEO-UHFFFAOYSA-N 0.000 description 1
- NEXNFVYMWWFCGN-MJFQDJNOSA-M CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCC1=O[Mg]OC(C2=CC=C(CC)C=C2)=C1 Chemical compound CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCC1=O[Mg]OC(C2=CC=C(CC)C=C2)=C1 NEXNFVYMWWFCGN-MJFQDJNOSA-M 0.000 description 1
- HSDWMEOHNSHTHY-UHFFFAOYSA-N CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1 Chemical compound CCCCCCC1=O[H]OC(C2=CC=C(CC)C=C2)=C1.CCCCCCCC1=O[H]OC(C2=CC=C(C)C=C2)=C1 HSDWMEOHNSHTHY-UHFFFAOYSA-N 0.000 description 1
- XYECVVJWIAEWHK-OGAGDVQBSA-L CCCCCCC1=O[Zn]2(OC(C3=CC=C(CC)C=C3)=C1)OC(C1=CC=C(CC)C=C1)=CC(CCCCCC)=O2 Chemical compound CCCCCCC1=O[Zn]2(OC(C3=CC=C(CC)C=C3)=C1)OC(C1=CC=C(CC)C=C1)=CC(CCCCCC)=O2 XYECVVJWIAEWHK-OGAGDVQBSA-L 0.000 description 1
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
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/24—Aldehydes; Ketones
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/20—Aldehydes; Ketones
-
- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/18—Complexes with metals
-
- 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
- C10M2207/08—Aldehydes; Ketones
- C10M2207/085—Aldehydes; Ketones 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
- C10M2207/09—Metal enolates, i.e. keto-enol metal complexes
-
- 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
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/09—Complexes with metals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/079—Liquid crystals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Lubricants (AREA)
Abstract
Description
- This invention relates to lubricants containing mesogenic compounds.
- Lubricants which contain mesogenic compounds have long been known (EP 0 330 068). It is assumed that a mesophase, that is to say a nematic, smectic or discotic liquid-crystalline phase, can be induced therein by increasing the pressure or by a lubricating action in machine bearings. Such phases which are formed by compounds with elongated bar-shaped or discoid molecules are generally known (H Kelker, R Hatz, Handbook of Liquid Crystals, Verlag Chemie, Weinheim 1980). Such phase transitions make it possible to avoid in particular in the lubrication gap of plain bearings contacts between the solid bodies which are moving relative to each other. In comparison with conventional lubricants it is possible therewith to achieve an enormous reduction in frictional losses. Thus, under conditions at which coefficients of friction of between 0.2 and 0.1 (typical of mixed friction) were found, coefficients of friction of <0.005 were measured, which are typical for plain bearings operated in the hydrodynamic range (R Eidenschink, Mol. Cryst. Liq. Cryst. 461, 71-81 (2007) and literature quoted therein).
- The lubricants which have been known hitherto and which contain substances with liquid-crystalline properties must be produced in an expensive and complicated procedure and with high losses in respect of materials used. Hitherto therefore they could only be used for the lubrication of highly problematical bearings.
- The invention concerns a lubricant containing between 20 and 99.9% by mass of one or more compounds of the general formula 1
- wherein
- X denotes H, F, Cl, —CH3, —C2H5, —OCH3, R1 respectively denote independently of each other H, an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— or —CO— and two adjacent CH2 groups can be replaced by —COO— or —OOC—,
- R2 respectively denote independently of each other an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— and two non-adjacent CH2 groups can be replaced by —COO— or —OOC—, or the residue
- with the above-specified significances for X and R1 and wherein n is a number between zero and 12 and q is zero or 1,
- and machine bearings lubricated therewith.
- The object of the present invention was to find the lubricant which can be economically produced from inexpensive starting materials and which nonetheless permits particularly low coefficients of friction in comparison with conventional lubricants, in particular in plain bearings. The compounds of formula 1 above have admittedly been recorded by a Markus formula of an earlier invention (DE 38 10 626) but because of the low ratio of length and diameter of their molecules no liquid-crystalline properties can be assumed by the man skilled in the art, and also a liquid-crystalline phase was never observed in such compounds.
- Surprisingly however particularly low coefficients of friction can be achieved in machine bearings by the lubricant according to the invention. An above-indicated phase transition which is induced by shearing actions in the lubrication gap of a bearing is responsible for that surprising effect, in spite of the disadvantageous geometry of the molecules of the compounds of formula 1. It is however also possible that there is an unknown cause in that respect.
- The compounds of the general formula 1 can advantageously be produced by a single synthesis step from inexpensive compounds. For that purpose an acetophenone which is dissolved in a carboxylic acid ester can be condensed under the effect of sodium (see DE 29 18 775, synthesis diagram 1).
- With the same reaction implementation, starting from an acetophenone and a dicarboxylic acid ester, compounds of formula 1 are also obtained (synthesis diagram 2).
- The β-benzoyl carboxylic acid esters also embraced by the invention (see K Matsuki et al, Chem. Pharm. Bull 41, 643 (1993), synthesis diagram 3) can be produced in the same fashion.
- R1 in general formula 1 preferably denotes an alkyl or an alkoxy group with between 1 and 7 C-atoms. They are preferably unbranched.
- R2 in general formula 1 preferably denotes an alkyl or alkoxy group with between 1 and 12 C-atoms, wherein the chains are preferably unbranched.
- X in general formula 1 preferably denotes H or —CH3, of which H is particularly preferred.
- The compounds of general formula 1 include the following preferred sub-formulae 1a, 1b and 1c, wherein in the formulae 1b and 1c the significances of X and R1 are respectively independent of each other.
- Thereof compounds of the formulae 1a and 1c are preferred.
- Besides compounds of formula 1 the lubricant according to the invention can contain up to 80% of one or more additives. Such additives can be known lubricating oils such as mineral oils produced from crude oil or synthetic oils (see Ullmann's Encyclopaedia of Industrial Chemistry, 5th Edition, Vol A15, page 423 ff) and the additives known in tribology such as anti-wear substances, anti-oxidants or anti-seizure substances.
- Within the invention those additives which as is known involve a grease-like consistency such as metal soaps or polymers also apply as additives. The latter can act as gel-forming agents or can be present in the form of finely distributed particles such as for example PTFE (polytetrafluoroethylene). Besides lubricating oils therefore the lubricants according to the invention also include lubricating greases.
- It is generally known that aryl-substituted 1,3-diketones are predominantly present in the tautomeric keto-enol form 1 in accordance with the diagram:
- Within the present invention all tautomeric forms which are present in equilibrium are attributed to the keto compounds of the general formula 1. In the databanks such compounds are referred to in a simplifying fashion as 1,3-diketones and thus also in Example 1 hereinafter. As is known metal compounds (metal complexes) are derived from a keto-enol form. Those compounds are embraced by the present invention. Their general formula can be reproduced as follows:
- wherein Mm is a m-valent metal atom and m is a number between 1 and 4.
- Thus the structural formula
- can be specified for the zinc complex which can be produced from the keto compound from synthesis diagram 1.
- Preferred metal compounds are those of lithium, magnesium, titanium, zirconium, chromium, molybdenum, manganese, iron, nickel, copper, zinc and tin, of which those of lithium, magnesium and zinc are particularly preferred. Those compounds are preferably produced by the acetate, the acetyl acetonate complex or an alcoholate of the metal in question being heated with one or more compounds of formula 1 and by the acetic acid which is liberated in that respect or the acetyl acetone or the alcohol being evaporated. Those metal compounds produced from compounds of the general formula 1 can be present in a dissolved form but also in the form of a solid body if the lubricant according to the invention is a lubricating grease. If there are more than one compound of formula 1 there can be metal compounds with different ligands. A proportion of those metal compounds deemed to be within the present invention is that which is obtained when the compounds of formula 1 and possibly also volatile additives are removed from the lubricant by distillation at 180° C. sump temperature under an adequate reduced pressure. The residue comprises the metal compounds according to the invention which are most stable at the sump temperature, and possibly further non-volatile additives. The distinction which is possibly necessary between the metal compounds from the compounds of formula 1 and further non-volatile additives is effected in accordance with generally known analytical methods. A distinction which is possibly necessary between compounds of formula 1 and other volatile additives is also effected in the distillate.
- The compounds of general formula 1 can be mixed with other components which are usual in the lubrication art, by simple stirring at ambient temperature.
- The lubricant according to the invention contains between 20 and 99.9, preferably between 50 and 99.9 and quite preferably between 70 and 99.9% of compounds of general formula 1 and/or metal compounds produced from those compounds.
- The lubricant according to the invention can advantageously be used in the generally known machine bearings which as is known are divided into plain bearings or rolling bearings. Particular advantages are achieved in the lubrication of plain bearings, more specifically those in machines in the textile industry, for example in regard to the needle guides of sewing machines, but also for lubricating pistons of high-speed internal combustion engines.
- The following Examples are intended to describe the invention without limiting it. Temperatures are specified in degrees Celsius hereinbefore and hereinafter. Percentages denote percent by mass. Hz denotes the oscillation frequency in 1/s. Within the invention a coefficient of friction is deemed to be particularly low if a coefficient of friction of ≦0.05 can be achieved therewith in the test arrangement described in Example 1, with the specified parameters.
- The compound produced in accordance with synthesis diagram 1, 1-(4-ethylphenyl)-3-hexyl-1,3-propandion, has a melting point of −1° C. and above that temperature is an isotropic fluid with a kinematic viscosity of 11.7 mm/s2 at 23° C. 0.2% of the anti-oxidant 2,6-di-tert.-butyl-p-kresol was dissolved therein.
- To demonstrate the attainability of particularly favorable coefficients of friction in plain bearings that lubricant was investigated in a reversing sliding wear contact (Tribometer SRV III, Optimol Instruments Prüftechnik GmbH, Munich). A drop of the lubricant was put on to a flat disk of a diameter of 24 mm and a thickness of 7.9 mm. A cylinder of a diameter of 15 mm and a length of 22 mm was moved thereon (both components involved in the frictional relationship were of steel 100Cr6, corresponding to the Deutsche Industrie Norm DIN 51834) at 90° C. under a load of 50 N at 50 Hz and a stroke of 1 mm at an angle of 10° in parallel relationship with the axis of rotation of the cylinder. After 6 hours of test duration the coefficient of friction had fallen from initially 0.20 to below 0.005. That value was not exceeded up to the time that measurement was broken off after 20 hours. For comparison: commercially available lubricants, with the same parameters in respect of measurement, have coefficients of friction of between 0.2 and 0.1.
- A lubricant (lubricating grease) produced from:
- 30% PTFE powder, 5 μm (Dr Tillwich GmbH, Horb) presents particularly low coefficients of friction in plain bearings.
- A lubricant comprising
- 80% paraffin oil, with a dynamic viscosity at 20° C. 100-145 mPa·s, CAS 8012-95-1 presents particularly low coefficients of friction in plain bearings.
- A lubricant comprising
- 25% paraffin oil, with a dynamic viscosity at 20° C. 100-145 mPa·s, CAS 8012-95-1 presents particularly low coefficients of friction in plain bearings.
-
- are brought together and heated for 2 hours with agitation in a vacuum of 10 mbar at 120° C. The lubricant freed of ethanol (a lubricating grease) is of the composition
- It presents particularly low coefficients of friction in plain bearings.
Claims (10)
1-5. (canceled)
6. A lubricant containing between 20 and 99.9% by mass of one or more compounds of the general formula 1
wherein
X denotes H, F, Cl, —CH3, —C2H5, —OCH3,
R1 respectively denote independently of each other H, an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— or —CO— and two adjacent CH2 groups can be replaced by —COO— or —OOC—,
R2 respectively denote independently of each other an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— and two non-adjacent CH2 groups can be replaced by —COO— or —OOC—, or the residue
with the above-specified significances for X and R1 and wherein n is a number between zero and 12 and q is zero or 1.
7. A lubricant as set forth in claim 6 wherein it contains between 50 and 99.9% by mass of one or more compounds selected from the keto compounds of general formula 1.
8. A lubricant as set forth in claim 6 wherein it contains between 70 and 99.9% by mass of one or more compounds selected from the keto compounds of general formula 1.
9. A method for reducing frictional losses between mutually moved solid bodies comprising interposing a compound according to claim 6 between the solid bodies.
10. A method for reducing frictional losses between mutually moved solid bodies comprising interposing a compound according to claim 7 between the solid bodies.
11. A method for reducing frictional losses between mutually moved solid bodies comprising interposing a compound according to claim 8 between the solid bodies.
12. A bearing containing a lubricant according to claim 6 .
13. A bearing containing a lubricant according to claim 7 .
14. A bearing containing a lubricant according to claim 8 .
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007055554.9A DE102007055554B4 (en) | 2007-11-21 | 2007-11-21 | Use of a lubricant to reduce friction losses between moving solids in machine bearings or for lubricating pistons of high-speed internal combustion engines |
DE102007055554.9 | 2007-11-21 | ||
PCT/EP2008/065608 WO2009065785A2 (en) | 2007-11-21 | 2008-11-14 | Lubricant |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110086784A1 true US20110086784A1 (en) | 2011-04-14 |
Family
ID=40576856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/743,885 Abandoned US20110086784A1 (en) | 2007-11-21 | 2008-11-14 | Lubricant |
Country Status (3)
Country | Link |
---|---|
US (1) | US20110086784A1 (en) |
DE (1) | DE102007055554B4 (en) |
WO (1) | WO2009065785A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013066585A1 (en) * | 2011-10-31 | 2013-05-10 | The Lubrizol Corporation | Ashless friction modifiers for lubricating compositions |
CN106397168A (en) * | 2016-09-06 | 2017-02-15 | 武汉理工大学 | Ultra-lubricating material and preparation method thereof |
CN111909752A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Fluorine lubricating additive, preparation method thereof and lubricating material |
CN111909754A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Composite lubricating composition and lubricating material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009013072A1 (en) | 2009-03-13 | 2010-09-16 | Nematel Gmbh & Co. Kg | Lubricating oil, useful in machine bearings, preferably friction bearing and rolling bearing, comprises di-1,4-cyclohexylene-compound |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004070A (en) * | 1958-12-30 | 1961-10-10 | Gulf Research Development Co | Beta-diketones |
US5160451A (en) * | 1988-02-26 | 1992-11-03 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Mechanical component |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2223932A (en) * | 1937-12-20 | 1940-12-03 | Texas Co | Lubricating oil |
GB548262A (en) * | 1941-03-31 | 1942-10-02 | Ralph Forder Denington | Improvements in or relating to the protection of metal surfaces from corrosion |
US2530273A (en) * | 1948-12-11 | 1950-11-14 | Rohm & Haas | Preparation of aryl diketones |
NL290666A (en) * | 1962-03-27 | |||
US3329611A (en) * | 1965-03-17 | 1967-07-04 | Sinclair Research Inc | Lubricating oil composition |
US3360467A (en) * | 1965-03-29 | 1967-12-26 | Monsanto Res Corp | Functional fluid |
IT1025400B (en) * | 1973-11-05 | 1978-08-10 | Monsanto Co | ELECTRIC CONDENSER AND RELATIVE DIELECTRIC COMPOSITION IMPREGNATING |
DE2918775A1 (en) | 1979-05-10 | 1980-11-20 | Merck Patent Gmbh | DIKETONES, METHOD FOR THE PRODUCTION THEREOF AND THEIR USE AS COMPONENT LIQUID CRYSTAL IN DIELECTRICS |
DE3810626A1 (en) | 1988-03-29 | 1989-10-19 | Merck Patent Gmbh | Machine element |
JP2979363B2 (en) * | 1992-09-18 | 1999-11-15 | 花王株式会社 | Composition for working fluid of refrigerator |
JP2005264148A (en) * | 2004-01-30 | 2005-09-29 | Idemitsu Kosan Co Ltd | LUBRICATING OIL ADDITIVE COMPOSED MAINLY OF beta-DIKETONE COMPOUND |
-
2007
- 2007-11-21 DE DE102007055554.9A patent/DE102007055554B4/en active Active
-
2008
- 2008-11-14 WO PCT/EP2008/065608 patent/WO2009065785A2/en active Application Filing
- 2008-11-14 US US12/743,885 patent/US20110086784A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004070A (en) * | 1958-12-30 | 1961-10-10 | Gulf Research Development Co | Beta-diketones |
US5160451A (en) * | 1988-02-26 | 1992-11-03 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Mechanical component |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013066585A1 (en) * | 2011-10-31 | 2013-05-10 | The Lubrizol Corporation | Ashless friction modifiers for lubricating compositions |
US10590363B2 (en) | 2011-10-31 | 2020-03-17 | Daniel J. Saccomando | Ashless-friction modifiers for lubricating compositions |
CN106397168A (en) * | 2016-09-06 | 2017-02-15 | 武汉理工大学 | Ultra-lubricating material and preparation method thereof |
CN111909752A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Fluorine lubricating additive, preparation method thereof and lubricating material |
CN111909754A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Composite lubricating composition and lubricating material |
CN111909752B (en) * | 2020-08-26 | 2021-09-28 | 武汉理工大学 | Fluorine lubricating additive, preparation method thereof and lubricating material |
Also Published As
Publication number | Publication date |
---|---|
WO2009065785A2 (en) | 2009-05-28 |
DE102007055554A1 (en) | 2009-05-28 |
DE102007055554B4 (en) | 2016-10-20 |
WO2009065785A3 (en) | 2009-11-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6228820B1 (en) | Method for using thermally stable esters in a lubricating oil for a refrigerating machine | |
CA2684943C (en) | Lubricating oil composition for refrigerators and compressors using the composition | |
US20110086784A1 (en) | Lubricant | |
Schneider et al. | Capacity of selected ionic liquids as alternative EP/AW additive | |
TW200923071A (en) | Lubricating oil base oil and lubricating oil composition | |
JP7084794B2 (en) | Ionic liquids and lubricant compositions | |
WO2010079744A1 (en) | Lubricant composition | |
Ren et al. | A study of the tribological properties of S-(1H-benzotriazol-1-yl)-methyl, O, O'-dialkyldithiophosphates as additives in liquid paraffin | |
CN102807908A (en) | Wide temperature range polyol ester lubricating oil composition suitable for aircraft engine | |
TW201211234A (en) | Lubricant base oil and lubricant composition | |
JP5916916B2 (en) | Lubricating compound and lubricant composition containing the same | |
JP6663695B2 (en) | Heat resistant conductive lubricant | |
JP5994074B2 (en) | Alkylated diphenyl ether compound and lubricating oil containing the compound | |
JP2008280381A (en) | Lubricant base oil for internal combustion engine and lubricating oil composition for internal combustion engine | |
Amann et al. | Ultralow friction of mesogenic fluid mixtures in tribological reciprocating systems | |
Pandey et al. | Synthesis of oil miscible novel silane functionalised imidazoline-based ILs as lubricant additives: Characterization and tribological evaluations | |
JP5994082B2 (en) | Alkylated diphenyl ether compound and lubricating oil containing the compound | |
JP6472024B2 (en) | Lubricant composition containing lubricating base oil and liquid crystalline grease compound, and mechanical device | |
US5866522A (en) | Sulfur containing aromatic lubricant and method of using same | |
JP2006328127A (en) | Lubricant composition | |
US11220651B2 (en) | Reciprocating-type compressor oil | |
JPH10279973A (en) | Lubricant | |
JPS60161486A (en) | Lubrication oil composition for white metal bearing | |
JP2021147558A (en) | Mixed liquid crystal lubricant | |
JPH10338894A (en) | Lubricating oil for light metal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NEMATEL GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:EIDENSCHINK, RUDOLF;KRETZSCHMANN, HOLGER;REEL/FRAME:025604/0978 Effective date: 20100607 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |