WO2010003920A1 - Grease composition - Google Patents
Grease composition Download PDFInfo
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- WO2010003920A1 WO2010003920A1 PCT/EP2009/058512 EP2009058512W WO2010003920A1 WO 2010003920 A1 WO2010003920 A1 WO 2010003920A1 EP 2009058512 W EP2009058512 W EP 2009058512W WO 2010003920 A1 WO2010003920 A1 WO 2010003920A1
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- WIPO (PCT)
- Prior art keywords
- fatty acid
- resin
- thickener
- metal salt
- grease composition
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M129/26—Carboxylic acids; Salts thereof
- C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
- C10M129/40—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/103—Clays; Mica; Zeolites
- C10M2201/1036—Clays; Mica; Zeolites used as thickening agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M2207/1206—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms used as thickening agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
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- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/02—Groups 1 or 11
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- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- 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
- C10N2020/065—Saturated Compounds
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- 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
- C10N2020/067—Unsaturated Compounds
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- 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
- C10N2020/069—Linear chain compounds
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- 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
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- 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
- C10N2040/02—Bearings
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- 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
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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- 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
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- 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
- This invention relates to a grease composition for use in resin lubrication which is used at lubrication points where rolling or sliding occur when resin materials are employed.
- the various sliding parts of R&P steering rack guides for example, in the movable parts of electric door mirrors or the sliding parts of telescopic shafts in car steering, the various sliding parts of R&P steering rack guides, the power transmission gears of electric power steering devices, the internal sliding parts of various actuators and air cylinders, linear guides and ball screw retainers in machine tools, various bearing retainers, the sliding parts of crane booms, and also the resin gear parts in audio machines such as radio cassette players, videotape recorders and CD players, the resin gear parts in office automation equipment such as printers, photocopiers and faxes, and the sliding parts in various electrical switches, there are lubrication points where resin and resin or resin and a material other than resin such as a metal function by coming into a state of contact.
- extreme pressure agents and anti-wear agents which contain elements such as phosphorus or sulphur are effective against the friction and wear of metal against metal, and that these additives form a film which proactively causes a chemical reaction with the metallic surface, thereby exhibiting the functions of reducing friction and wear and preventing machinery from seizing up.
- This technology is widely used in engine oils and gear oils and in high- performance industrial lubricating oils and greases.
- Japanese Laid-open Patent 2005-54024 Japanese Laid-open Patent 2005-54024
- a grease composition for use in resin lubrication which contains a non-polar wax or polar wax along with a base oil such as a poly- ⁇ -olefin oil, a mineral oil or a highly refined mineral oil and a metallic soap or metallic complex soap thickener. Further improvements are anticipated.
- This invention is an attempt to obtain a grease composition for use in resin lubrication wherein friction is attenuated and satisfactory lubrication performance is obtained at lubrication points where rolling and sliding and so on occur where at least one side of a paired structure, such as resin against resin or resin against a different material such as a metal, is comprised of a resinous material.
- This invention is for a grease composition for use in resin lubrication incorporating into a grease base material which includes a base oil and a fatty acid metal salt thickener at least one saturated or unsaturated fatty acid having from 8 to 22 carbon atoms and/or fatty acid metal salt, being a metal salt of a linear saturated fatty acid having from 8 to 14 carbon atoms or a metal salt of an unsaturated fatty acid having from 16 to 22 carbon atoms and from 1 to 4 unsaturated groups, the metal having a valence of from 1 to 4 ⁇ excluding fatty acid metal salts used for the thickener) .
- the metals of the fatty acid metal salts include metals such as lithium, sodium, potassium, magnesium, calcium, zinc, aluminium and lead.
- the total amount of saturated or unsaturated fatty acid and/or fatty acid metal salt used is in the order of from 0.1 to 10% by mass. Further, it is possible to use, together with the fatty acid metal salt thickener, other kinds of thickener such as a urea, bentonite, calcium phosphate or sodium terephthalamate, singly or in mixtures.
- friction is attenuated so that it is possible to obtain satisfactory lubrication performance at lubrication points such as rolling and sliding points between parts comprising resinous materials one against another, and it is possible to use it over a wide range as a grease composition for use in resin lubrication.
- the base oil in this invention is one which may ordinarily be used as the base oil of a lubricating oil or as the base oil of a grease, and there are no special restrictions.
- base oils which belong to Group I, Group II, Group III, Group IV and so on of the API (American Petroleum Institute) base oil categories.
- Group I base oils include, for example, paraffinic mineral oils obtained by a suitable combination of refining processes such as solvent refining, hydrorefining, and dewaxing in respect of lubricating oil — o fractions obtained by atmospheric distillation of crude oil.
- Group II base oils include, for example, paraffinic mineral oils obtained by a suitable combination of refining processes such as hydrorefining and dewaxing in respect of lubricating oil fractions obtained by atmospheric distillation of crude oil.
- Group II base oils refined by hydrorefining methods such as the Gulf Company method have a total sulphur content of less than 10 ppm and an aromatic content of not more than 5% and so are suitable for this invention.
- Group III base oils and Group 11+ base oils include paraffinic mineral oils manufactured by a high degree of hydrorefining in respect of lubricating oil fractions obtained by atmospheric distillation of crude oil, base oils refined by the Isodewax process which dewaxes and substitutes the wax produced by the dewaxing process with isoparaffins, and base oils refined by the Mobil wax isomerisation process. These too are suitable for use in this invention.
- synthetic oils include polyolefins, polyoxyalkylene glycols such as polyethylene glycol or polypropylene glycol, esters such as di-2- ethylhexyl sebacate or di-2-ethylhexyl adipate, polyol esters such as trimethylolpropane esters or pentaerythritol esters, perfluoroalkyl ethers, silicone oils, polyphenyl ethers, and so on.
- polyolefins polyoxyalkylene glycols such as polyethylene glycol or polypropylene glycol
- esters such as di-2- ethylhexyl sebacate or di-2-ethylhexyl adipate
- polyol esters such as trimethylolpropane esters or pentaerythritol esters
- perfluoroalkyl ethers silicone oils
- polyphenyl ethers and so on.
- the aforementioned polyolefins include polymers of various olefins or hydrides thereof. Any olefin may be used, and as examples mention may be made of ethylene, propylene, butene and ⁇ -olefins with five or more carbons. In the manufacture of polyolefins, one of the aforementioned olefins may be used singly or two or more may be used in combination. Particularly suitable are the polyolefins called poly- ⁇ -olefins (PAO) . These are base oils of Group IV.
- PAO poly- ⁇ -olefins
- GTL (gas to liquid) base oils synthesised by the Fischer-Tropsch method of converting natural gas to liquid fuel have a very low sulphur content and aromatic content compared with mineral oil base oils refined from crude oil and have a very high paraffin constituent ratio, and so have excellent oxidative stability, and because they also have extremely small evaporation losses, they are suitable as base oils for this invention.
- the thickener in this invention uses fatty acid metal salts.
- These fatty acid metal salts are those in which the fatty acid and metal are bonded, and they are normally called metallic soaps.
- metallic soaps As illustrative examples mention may be made of lithium soaps, sodium soaps, potassium soaps, magnesium soaps, calcium soaps, barium soaps, aluminium soaps, zinc soaps, lead soaps and complex soaps therefrom. These may be used singly or in mixtures thereof.
- the additive added to the grease base material which incorporates the aforementioned base oil and thickener is a saturated or unsaturated fatty acid having from 8 to 22 carbon atoms and/or a fatty acid metal salt being a metal salt of a linear saturated fatty acid having from 8 to 14 carbon atoms or a metal salt of an unsaturated fatty acid having from 16 to 22 carbon atoms and from 1 to 4 unsaturated groups, the metal having a valence of from 1 to 4 (excluding fatty acid metal salts used for the thickener) .
- saturated or unsaturated fatty acids in this invention are preferably those having from 8 to 22 carbon atoms, and in the case of fatty acid metal salts are preferably linear saturated fatty acid salts having from 8 to 14 carbon atoms or unsaturated fatty acid metal salts having from 16 to 22 carbon atoms.
- the metals in the fatty acid metal salts of this invention are lithium, sodium, potassium, magnesium, calcium, zinc, aluminium, lead and so on, the effect of reducing the frictional force between materials at the lubrication points between the resin and material other than resin is large, and these metals and fatty acids can be reacted easily.
- the fatty acid salts are also stable chemically and are easy to maintain in the preferred lubrication state.
- the total amount of the saturated or unsaturated fatty acids or the one or more fatty acid metal salts it is best to add these in an amount in the range of from 0.1 to 10% relative to the total amount of the grease composition, and preferably they should be used in the range of from 1 to 5% by mass. If they are present in an amount of less than 0.1% by mass, the electrochemical action on the surface is too small, and the effect of reducing the friction coefficient is too low. If they are present in an amount of greater than 10% by mass, it becomes difficult to demonstrate the basic performance of the grease composition (for example, viscoelasticity, shear stability, heat resistance and so on) effectively, and it is likely that it will become difficult to maintain a stable state over the long term. Costs also rise.
- the anti-oxidants include, for example, 2,6-di-t- butyl-4-methylphenol, 2, 6-di-t-butyl-paracresol, P, P'- dioctyldiphenylamine, N-phenyl- ⁇ -naphthylamine, phenothiazines and so on.
- the rust preventatives include paraffin oxide, carboxylic acid metal salts, sulphonic acid metal salts, carboxylic acid esters, sulphonic acid esters, salicylic acid esters, succinic acid esters, sorbitan esters and various amine salts.
- the oiliness agents, extreme pressure additives and anti-wear agents include, for example, sulphurised zinc dialkyl dithiophosphates, sulphurised zinc diaryl dithiophosphates , sulphurised zinc dialkyl dithiocarbamates, sulphurised zinc diaryl dithiocarbamates, sulphurised molybdenum dialkyl dithiophosphates, sulphurised molybdenum diaryl dithiophosphates, sulphurised molybdenum dialkyl dithiocarbamates, sulphurised molybdenum diaryl dithiocarbamates, organic molybdenum complexes, sulphurised olefins, triphenylphosphates, triphenylphosphorothionates, tricresylphosphates, other phosphate esters and sulphurised fats and oils.
- the solid lubricants include, for example, molybdenum disulphide, graphite, boron nitride, melamine cyanurate, PTFE (polytetrafluoroethylene) , tungsten disulphide, mica, graphite fluoride and so on.
- the metal deactivators include N, N' -disalicylidene- 1, 2-diaminopropane, benzotriazole, benzoirnidazole, benzothiazole, thiadiazole and so on.
- one of the paired materials must be a resin, but the part which pairs with this resin can be, in addition to a resin, not only various metallic materials such as iron, copper, aluminium or other metal, or alloys, thereof, but also rubber and glass, or nonTM polar materials such as ceramics, and so it can be widely used with no special restrictions.
- plastic or engineering plastic for the aforementioned resin materials, and as examples mention may be made of polyamides, polyacetals, polycarbonates, polyethylene terephthalates, polybutylene terephthalates, polybutylene naphthalates, polyphenylene ethers, polyphenylene sulphide, fluorinated resins, polyacrylates, polyamidimides, polyether imides, polyether ether ketones, polysulphones, polyether sulphones, polyimides, polystyrenes, polyethylenes, polypropylenes, phenol resins, AS resins, ABS resins, AES resins, AAS resins, ACS resins, MBS resins, polyvinyl chloride resins, epoxy resins, diallyl phthalate resins, polyester resins, methacryl resins, and ABS/polycarbonate alloys, but they are not limited to these.
- Base oil A a mineral oil with kinematic viscosity at 40 0 C of 101.1 mm 2 /s.
- Base oil B a poly- ⁇ -olefin oil with kinematic viscosity at 40 0 C of 31.2 mmVs.
- Base oil C a highly refined oil with kinematic viscosity at 40 0 C of 47.08 rnrnVs, viscosity index of 146, %CA of less than 1, %CN of 11.9, and %CP of not less than 85.
- Thickener A lithium 12-hydroxystearate soap obtained by a reaction of 12-hydroxystearic acid and lithium hydroxide in the base oil.
- Thickener B a diurea obtained by a synthesis reaction of 2 mol of octylamine and 1 mol of MDI (4,4'- diphenylmethanediisocyanate ⁇ in the base oil.
- Thickener C bentonite obtained by gelation after swelling bentonite with an organic solvent in a base oil.
- Thickener D sodium terephthalamate obtained by reaction of methyl N-octadecyl terephthalamate and sodium hydroxide in the base oil.
- Thickener E obtained by gelation after swelling an hydroxyapatite/tricalcium phosphate composite as expressed by [Ca 3 (PO 4 I 2 ] 3 * Ca(OH) 2 with an organic solvent.
- the greases were prepared in a kettle using the base oils and thickener in the proportions shown for Examples 1 to 13 in Tables 1 to 3, and the grease compositions were obtained by adding the various fatty acids and/or fatty acid metal salts.
- the base oil, thickener and the various fatty acids or fatty acid metal salts which are the additives were first weighed out in the proportions shown in Tables 1 to 2 so that the total amount of the grease composition would be 1000 g. Then, the base oil and the 12-hydroxystearic acid and lithium hydroxide with a small amount of water were pasted into a kettle of capacity 3 kg specially used for preparation of greases. After sealing, while heating and stirring, a saponification reaction was effected, and the pressure was raised to 0.35 MPa at approximately 150 0 C. Then the water was gradually removed, and the contents were dissolved by further heating to 215°C.
- thickener A a lithium soap
- the fatty acid metals salts specified in Tables 1 to 3 were used as obtained by first reacting the fatty acids and metals in accordance with the molar ratios specified in Tables 1 to 3 (and similarly also for the comparative examples of Table 4 below) .
- the base oil, thickener B and the various fatty acids or fatty acid metal salts which are the additives were first weighed out in the proportions shown in Tables 2 and 3 so that the total amount of the grease composition would be 1000 g. Then part of the base oil and the MDI (4 , 4' -diphenylmethanediisocyanate) which was the raw material for thickener B were pasted into a kettle of capacity 3 kg specially used for preparation of greases. While heating and stirring, the temperature was raised to 60 0 C, and a reaction was effected by folding in octylamine already dissolved and mixed in the remaining part of the base oil. The temperature was further raised to 180 0 C, cooling was then effected at a fixed rate, and the aforementioned various fatty acids or fatty acid metal salts were pasted in and, after a homogeniser treatment, the grease compositions were obtained.
- the base oil, thickener C and the various fatty acids or fatty acid metal salts which are the additives were first weighed out in the proportions shown in Table 3 so that the total amount of the grease composition would be 1000 g. Then the base oil, the bentonite of thickener C and an organic solvent to promote gelation were pasted into a kettle of capacity 3 kg specially used for preparation of greases. While heating and stirring, the temperature was gradually raised to 150 0 C so that the organic solvent was made sufficiently volatile to effect uniform diffusion and swelling. Cooling was then effected at a fixed rate, and the aforementioned various fatty acids or fatty acid metal salts were pasted in and, after a homogeniser treatment, the grease compositions were obtained.
- thickener C a bentonite
- the base oil, thickener D and the various fatty acids or fatty acid metal salts which are the additives were first weighed out in the proportions shown in Table 3 so that the total amount of the grease composition would be 1000 g. Then the base oil and the methyl N-octadecylterephthalamate which was the raw material of thickener D were pasted into a kettle of capacity 3 kg specially used for preparation of greases.
- the base oil, thickener E and the various fatty acids or fatty acid metal salts which are the additives were first weighed out in the proportions shown in Table 3 so that the total amount of the grease composition would be 1000 g. Then, the base oil, the tricalcium phosphate and an organic solvent to promote gelation were pasted into a kettle of capacity 3 kg specially used for preparation of greases. While heating and stirring, the temperature was gradually raised to 15O 0 C so that the organic solvent was made sufficiently volatile to effect uniform diffusion and swelling.
- Dropping point measured in accordance with JIS K2220-8.
- Friction tests Bowden type friction tests were carried out. In other words, the friction coefficient between a resin (test material Ib) and a paired material other than a resin (test material Ia) was measured under the following test conditions using a Bowden friction test rig.
- Test material Ia Material - Copper alloy
- Test material Ib Material - polyacetal resin
- Examples 1 to 13 all displayed the grease characteristics of a semi-solid and the penetration displayed moderate hardness values in the range 267 to 290, while the dropping point was also of a satisfactory nature at not less than 177 to 210 0 C. Also, the friction coefficients between a polyamide resin and steel in the Bowden friction test were 0.060 to 0.069, and the friction coefficients between a polyacetal resin and copper alloy were uniformly low at 0.062 to 0.066, so that it was evident that a satisfactory lubrication performance was displayed between various resins and materials other than resins such as steel and alloys.
- the grease compositions of Comparative Examples 1 to 6 all displayed the grease characteristics of a semi-solid, and the penetration displayed hardness values in the range 265 to 281, while the dropping point was also of a satisfactory nature at 180 to 207 0 C, but the friction coefficients between a polyamide resin and steel in the Bowden friction test were 0.082 to 0.099, and the friction coefficients between a polyacetal resin and copper alloy were all high at 0.099 or 0.101, so that it was evident that they were all inferior to the examples of the present invention as regards the lubrication state between various resins and materials other than resins such as alloys or steel, and that no effect in improving lubrication performance was obtained.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09780191A EP2300582A1 (en) | 2008-07-07 | 2009-07-06 | Grease composition |
CN2009801294508A CN102112590A (en) | 2008-07-07 | 2009-07-06 | Grease composition |
US13/002,708 US20110136709A1 (en) | 2008-07-07 | 2009-07-06 | Grease composition |
BRPI0915732A BRPI0915732A2 (en) | 2008-07-07 | 2009-07-06 | Grease composition. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2008-176945 | 2008-07-07 | ||
JP2008176945 | 2008-07-07 | ||
JP2008222113A JP5330774B2 (en) | 2008-07-07 | 2008-08-29 | Grease composition for resin lubrication |
JP2008-222113 | 2008-08-29 |
Publications (1)
Publication Number | Publication Date |
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WO2010003920A1 true WO2010003920A1 (en) | 2010-01-14 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/058512 WO2010003920A1 (en) | 2008-07-07 | 2009-07-06 | Grease composition |
Country Status (7)
Country | Link |
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US (1) | US20110136709A1 (en) |
EP (1) | EP2300582A1 (en) |
JP (1) | JP5330774B2 (en) |
KR (1) | KR20110031482A (en) |
CN (1) | CN102112590A (en) |
BR (1) | BRPI0915732A2 (en) |
WO (1) | WO2010003920A1 (en) |
Cited By (1)
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CN114606044A (en) * | 2022-03-22 | 2022-06-10 | 姚文兵 | Extreme pressure lubricating grease and preparation method thereof |
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JP2022092773A (en) * | 2020-12-11 | 2022-06-23 | Eneos株式会社 | Grease composition and method for lubricating sliding part using the grease composition |
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- 2009-07-06 BR BRPI0915732A patent/BRPI0915732A2/en not_active IP Right Cessation
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CN114606044A (en) * | 2022-03-22 | 2022-06-10 | 姚文兵 | Extreme pressure lubricating grease and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP2300582A1 (en) | 2011-03-30 |
CN102112590A (en) | 2011-06-29 |
BRPI0915732A2 (en) | 2015-10-27 |
US20110136709A1 (en) | 2011-06-09 |
JP5330774B2 (en) | 2013-10-30 |
JP2010037530A (en) | 2010-02-18 |
KR20110031482A (en) | 2011-03-28 |
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