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
  • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
  • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
  • C10M137/04—Phosphate esters
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/02—Mixtures of base-materials and thickeners
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
  • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
  • C10M137/04—Phosphate esters
  • C10M137/06—Metal salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
  • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
  • C10M137/04—Phosphate esters
  • C10M137/08—Ammonium or amine salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M139/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
• • 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
  • C10M139/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
  • C10M139/02—Esters of silicon acids
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/06—Mixtures of thickeners and additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • 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
• • 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
  • C10M2207/128—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 containing hydroxy groups; Ethers thereof
  • C10M2207/1285—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 containing hydroxy groups; Ethers thereof used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/10—Amides of carbonic or haloformic acids
  • C10M2215/102—Ureas; Semicarbazides; Allophanates
  • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
• • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/041—Triaryl phosphates
• • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/042—Metal salts thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/043—Ammonium or amine salts thereof
• • 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
• • 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
• • 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—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy

Definitions

• the present invention relates to grease compositions that are useful in applications requiring extreme pressure (EP) properties.
• Greases used under severe lubrication conditions generally include load-bearing additives.
• load-bearing additives include oil-based agents such as long-chain fatty acids; wear-resistant additives such as phosphoric acid esters, metal dithiophosphate salts, organic ionic compounds, and organic halogen compounds that have sulfur, phosphorus, chlorine, etc. in their molecules.
• Agent/EP agent Solid additives such as molybdenum disulfide, graphite, boron nitride, and polytetrafluoroethylene are known (Non-Patent Document 1). Tricresyl phosphate is known as a typical phosphate ester EP agent.
• Patent Document 1 describes that surfactants such as polyoxyethylene alkyl ether phosphates, polyoxyalkylene alkyl ether phosphates, or their salts can be used as oil-based agents, but they can also be used as anti-wear agents and EP agents. There is no mention or suggestion that it can be used.
• Patent Document 2 describes that a titanate-based or aluminum-based coupling agent can be used to prevent low-temperature chattering of grease for electrical contacts, but it also states that the coupling agent can be used as an EP agent. There is no suggestion.
• Patent Document 3 claims that wear resistance is achieved by a combination of (A) base oil, (B) acidic phosphate ester, etc., and (c) isothiazoline compound.
• An object of the present invention is to provide a grease composition with excellent EP properties.
• the present inventors have discovered that such problems can be solved by including in a grease composition a compound that has a phosphate ester moiety in its molecular structure, which has not been used as an EP agent so far. That is, the present invention provides the following inventions. 1. (a) a compound having a phosphate ester moiety; A grease composition containing (b) a base oil, and (c) a thickener, and having a maximum non-seizure load of 980 N or more as measured in accordance with ASTM D-2596. 2. The grease composition according to the above item 1, which contains component (a) in an amount of 0.1 to 20% by mass based on the total mass of the composition. 3. 3. 3.
• component (a) is (a1) a compound represented by the following chemical formula (1).
• R 1 is an alkyl group having 1 to 24 carbon atoms or an aryl group which may have a substituent
• a 1 O is an alkyleneoxy group having 2 to 4 carbon atoms
• n is an integer from 0 to 30
• m is an integer from 1 to 3
• M is a hydrogen atom, an alkali metal, a Group 2 metal, an ammonium group, or an organic ammonium group.
• Component (a) is from the group consisting of (a2-1) a silane coupling agent, (a2-2) a titanium coupling agent, (a2-3) an aluminum coupling agent, and (a2-4) a zirconia coupling agent.
• the grease composition as described in 1 or 2 above which is at least one coupling agent (a2) selected having a phosphate ester moiety in its molecule. 5.
• the grease composition according to 1 or 2 above which has a fusion load of 1960 N or more as measured according to ASTM D-2596. 6. Use of the grease composition described in 1 or 2 above as an extreme pressure wear-resistant grease for bearings, gears, automobile parts, industrial machine parts, etc.
• Component (a) of the present invention is a compound having a phosphate ester moiety in its molecule.
• Component (a) is a compound that, when included in the base grease, can increase the maximum non-seizure load measured according to ASTM D-2596 to 980 N or more.
• Examples of component (a) include (a1) a compound represented by the following chemical formula (1), and (a2) a coupling agent containing a phosphate ester in the molecule.
• R 1 is a straight chain or branched alkyl group having 1 to 24 carbon atoms (preferably a straight chain or branched alkyl group having 3 to 18 carbon atoms), or an aryl group which may have a substituent (preferably phenol, dodecyl phenol, dinonylphenol, styrenated phenol, phenol derivatives, alkylbenzene, etc.).
• a 1 O is an alkyleneoxy group having 2 to 4 carbon atoms, preferably an ethyleneoxy group or a 1,2-propyleneoxy group, and more preferably an ethyleneoxy group.
• n means the number of moles of alkyleneoxy group added, and is an integer of 0 to 30. 0 to 12 is preferred.
• n AOs When n is 2 or more, the n AOs may be the same or different, and when they are different, the addition form of -(A 1 O)n- may be random addition, block addition, or alternate addition.
• m is an integer from 1 to 3, preferably 1 or 2.
• M is a hydrogen atom, an alkali metal, a Group 2 metal, an ammonium group, or an organic ammonium group. Na, Ca, ammonium groups, or organic ammonium groups are preferred.
• the compound of formula (1) is preferably a monoester or diester. More preferably, in formula (1), R 1 is a straight chain or branched alkyl group having 3 to 18 carbon atoms, a straight chain or branched alkenyl group having 3 to 18 carbon atoms, or a substituent such as phenol, dodecylphenol, dinonylphenol, styrenated phenol, phenol derivative, alkylbenzene, etc. is an aryl group having A 1 O is an ethyleneoxy group or a 1,2-propyleneoxy group, n is 0 to 12, m is 1 or 2, M is a monoester or diester in which M is Na, Ca, an ammonium group, or an organic ammonium group.
• anionic surfactants containing a phosphate ester moiety that can be used in the present invention other than the compound represented by formula (1) include glycerin fatty acid ester, polyoxyalkylene alkyl ether phosphoric acid, or salts thereof. can be given.
• trioxyethylene alkyl (12-15) ether phosphoric acid Specifically, trioxyethylene alkyl (12-15) ether phosphoric acid, nonaoxyethylene alkyl (12-15) ether phosphoric acid, trioxyethylene stearyl ether phosphoric acid, tetraoxyethylene lauryl ether phosphate, isopropyl ether phosphoric acid , butyl ether phosphoric acid, isohexyl ether phosphoric acid, alkyl (C6-C10) ether phosphoric acid, dodecyl ether phosphoric acid, lauryl ether phosphoric acid, isotridecyl ether phosphoric acid, alkyl (12-15) ether phosphoric acid, monooxy Ethylene isohexyl ether phosphoric acid, tetraoxyethylene alkyl (C6-C10) ether phosphoric acid, dioxyethylene dodecyl ether phosphoric acid, trioxyethylene isotridecyl ether phosphoric acid,
• Disparon DA-325 Disparon DA-375
• HIPLAAD ED152 HIPLAAD ED152
• HIPLAAD ED152 manufactured by Kusumoto Kasei
• Hypermer KD23 Hypermer KD24
• Crodafos 03A Croda.
• polyoxyalkylene alkyl ether phosphoric acid or its salt is preferable, polyoxyethylene alkyl ether phosphoric acid or its salt is more preferable, trioxyethylene alkyl (12-15) ether phosphoric acid, nonaoxyethylene alkyl (12-15) More preferred are ether phosphoric acid, trioxyethylene stearyl ether phosphoric acid, and tetraoxyethylene lauryl ether phosphoric acid.
• Component (a2) Coupling agent having a phosphate ester moiety in the molecule
• Component (a2) includes (a2-1) a silane coupling agent, (a2-2) a titanium coupling agent, and (a2-3) an aluminum coupling agent. , and (a2-4) a zirconia coupling agent.
• Specific examples include bis[2-diphenolphosphinoethylmethylsilylethyltriethoxysilane (SIB1091.0 manufactured by Azumax Co., Ltd.), 2-(diphenylfes, finoethyldimethylethoxysilane (SID4557.0 manufactured by Azumax Co., Ltd.)).
• diphenylfesphinoethyltriethoxysilane manufactured by Azumax Co., Ltd. SID4558.0
• diethylphosphatoethyltriethoxysilane manufactured by Azumax Co., Ltd.
• Examples of compounds having a phosphate moiety used in the present invention include trioxyethylene alkyl (12-15) ether phosphoric acid, nonaoxyethylene alkyl (12-15) ether phosphoric acid, trioxyethylene stearyl ether phosphoric acid, and tetraoxyethylene alkyl (12-15) ether phosphoric acid. At least one selected from the group consisting of ethylene lauryl ether phosphate, isopropyl tris(dioctyl pyrophosphate) titanate, and diisopropyl bis(dioctyl pyrophosphate) titanate is preferred.
• component (a) is preferably 0.1 to 20% by mass, more preferably 0.1 to 15% by mass, and even more preferably 0.5 to 5% by mass, based on the total mass of the composition. be.
• component (a) in an amount of 0.1 to 20% by mass, a grease composition with excellent load-bearing capacity can be obtained.
• Base oil may be mineral oil or synthetic oil, and is not particularly limited. Specific examples include mineral oils [e.g., paraffinic or naphthenic mineral oils], synthetic hydrocarbon oils [e.g., poly ⁇ -olefins (after polymerizing linear ⁇ -olefins having 6 to 18 carbon atoms such as 1-decene, oil obtained by hydrogenation), polybutene, alkylnaphthalene, alkylbenzene, ethylene- ⁇ -olefin cooligomer], ester oil [e.g. diester, polyol ester], ether oil [e.g.
• polyalkylene glycol, polyphenyl ether], fluorine Examples include oil, silicone oil, and ionic liquid.
• the synthetic oil may be so-called biomass oil, which is manufactured using biological resources derived from animals and plants as raw materials.
• biomass ester oil synthesized from various fatty acids and alcohols made from vegetable oils, and biomass hydrocarbon oils using vegetable oils such as palm oil, corn oil, and soybean oil can also be used.
• the base oils may be used alone or in combination of two or more. These base oils can be used alone or as a mixture of various oils.
• the base oil is preferably mineral oil, synthetic hydrocarbon oil (especially poly- ⁇ -olefin), or a mixed oil thereof, more preferably mineral oil or poly- ⁇ -olefin, and most preferably mineral oil (especially paraffinic mineral oil).
• the kinematic viscosity of the base oil at 40° C. is, for example, 30 to 500 mm 2 /s, preferably 50 to 300 mm 2 /s, more preferably 70 to 200 mm 2 /s (for example, 90 to 150 mm 2 /s). ). Note that the above kinematic viscosity is measured by a method based on JIS K 2283.
• the base oil content is, for example, 60 to 97% by mass, preferably 70 to 95% by mass, based on the total mass of the grease composition.
• the thickener used in the present invention can be used without particular limitation as long as it is a thickener commonly used in grease compositions. Specific examples include metal soaps, composite metal soaps, urea thickeners, urethane thickeners, carbon black, bentonite, silica compounds, and polytetrafluoroethylene (PTFE). Thickeners selected from the group consisting of metal soaps, composite metal soaps, urea thickeners, and silica (silicon dioxide) are preferred, and metal soaps and urea compounds are more preferred.
• metal soaps include aluminum soap, calcium soap, lithium soap, sodium soap, barium soap, and the like. Lithium soaps are preferred. More preferred are lithium stearate soap and lithium 12-hydroxystearate soap. Particularly preferred is lithium 12-hydroxystearate soap.
• complex metal soaps include lithium complex soaps and calcium complex soaps (for example, calcium sulfonate complex is a thickener that combines calcium sulfonate and calcium carbonate with calcium salts of higher or lower fatty acids and calcium salts of inorganic acids).
• the lithium complex soap include a complex soap composed of a lithium salt of 12-hydroxystearic acid and a lithium salt of azelaic acid, an aluminum complex soap, and the like.
• urea thickener examples include a diurea thickener obtained by reacting an aromatic diisocyanate with an aromatic amine, an aliphatic amine, a cyclohexylamine, or a mixture of two or more thereof.
• a diurea thickener can be represented by the following formula (2).
• R 10 -NHCONH-R 20 -NHCONH-R 30 (2)
• R 10 and R 30 may be the same or different, and are an aromatic hydrocarbon group having 6 to 15 carbon atoms, or a linear or branched alkyl group having 5 to 20 carbon atoms, or a cyclohexyl group
• R 20 is a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms.
• aromatic diisocyanates include tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, and the like.
• aromatic amines include paratoluidine, aniline, naphthylamine, and the like.
• aliphatic amines include octylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, heptadecylamine, octadecylamine, nonyldecylamine, Examples include eicosylamine.
• diurea thickener a thickener in which R 10 and R 30 are linear alkyl groups having 8 carbon atoms and R 20 is a group derived from diphenylmethane diisocyanate in formula (2) is preferable.
• This diurea thickener is a reaction product of octylamine and diphenylmethane diisocyanate.
• the diurea thickener also includes a compound in which R 10 is a linear alkyl group having 18 carbon atoms, R 30 is a cyclohexyl group, and R 20 is a group derived from diphenylmethane diisocyanate, in the formula (2); 10 and R 30 are linear alkyl groups having 18 carbon atoms, and R 20 is a group derived from diphenylmethane diisocyanate; and R 10 and R 30 are cyclohexyl groups, and R 20 is a group derived from diphenylmethane diisocyanate. Also preferred are diurea thickeners comprising the compound.
• This diurea thickener is a reaction product of octylamine and cyclohexylamine with diphenylmethane diisocyanate.
• the most preferred diurea thickener is a diurea thickener in formula (2) in which R 10 and R 30 are linear alkyl groups having 8 carbon atoms, and R 20 is a group derived from diphenylmethane diisocyanate.
• the silica preferably has an average primary particle diameter of 0.1 ⁇ m or less, more preferably 0.05 ⁇ m or less.
• the consistency of the grease composition of the present invention is preferably 100 to 440.
• the content of the thickener in the composition of the present invention is the amount necessary to obtain this consistency. Specifically, it is preferably 3 to 30% by mass, more preferably 5 to 25% by mass, based on the entire grease composition.
• the consistency is more preferably 150 to 360.
• penetration in this specification means 60 times worked penetration measured according to JIS K22207.
• the grease composition of the present invention has a maximum non-seizure load (L.N.S.L) defined by ASTM D-2596 of 980N or more.
• L.N.S.L a maximum non-seizure load
• ASTM D-2596 980N or more.
• this is a high load of 7 GPa, which is a severe condition comparable to the rolling contact and four-ball rolling test conditions of hybrid bearings made of metal and ceramic.
• the maximum non-seizure load (LNSL) is preferably 1236 N or more, more preferably 1569 N or more, from the viewpoint of EP performance.
• L. N. S. L indicates the limit load until the film breaks due to the load and seizure occurs due to direct contact between the steel balls.
• the grease composition of the present invention preferably has a fusion load (W.P) of 1960N or more as defined by ASTM D-2596. These are the criteria required for robots and gear devices. Regarding the fusion load (WP), the larger the value of the fusion load, the better the EP properties. JIS K2220 stipulates that the fusion load (WP) in this test is 2450N or more as a load-bearing grease, preferably 2450N or more from the viewpoint of EP properties, and more preferably 3089N or more. In addition, W. P represents the load when the steel balls are fused and integrated due to frictional heat generated by sliding between the steel balls.
• W. P represents the load when the steel balls are fused and integrated due to frictional heat generated by sliding between the steel balls.
• the grease composition of the present invention preferably has an OK value of 900N or more.
• it is a high load of 4.5 GPa, which exceeds the maximum surface pressure of CVJ of 3.5 GPa, which is the rolling and sliding test condition and the rolling condition of a motorcycle crank pin.
• the larger the OK value the better the EP properties.
• it is preferably 1000N or more, more preferably 1100N or more.
• the OK value indicates the load immediately before seizure in SRV step-up.
• the SRV test will be described later. In this specification, EP properties at high speeds are evaluated using a high speed four-ball load capacity test (shell four-ball test), and EP properties at low speeds are evaluated using an SRV test. L.
• N. S. L., and W.L. P mainly evaluates the wear due to rotational motion, point contact, and sliding friction
• the OK value measured by the SRV test mainly evaluates the wear EP property due to reciprocating motion, surface contact, and sliding friction. Showing excellent results for multiple exercise modalities, PV conditions, and parameters means that EP properties can be demonstrated at various levels.
• the grease composition of the present invention can further contain other additives, if necessary.
• additives include antioxidants (e.g. phenolic, amine), extreme pressure agents (e.g. zinc dithiocarbamate, zinc dithiophosphate, organomolybdenum), rust inhibitors (e.g. zinc naphthenate).
• carboxylic acids such as; sulfonic acids such as Zn sulfonate and Ca sulfonate), viscosity index improvers, dispersants, and combinations thereof.
• isothiazoline compounds such as 2-methyl-4-isothiazolin-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin- 3-one, 2-n-octylisothiazolin-3-one, 4,5-dichloro-2-n-octylisothiazolin-3-one, 1,2-benzisothiazolin-3-one, Nn-butyl-1 , 2-benzisothiazolin-3-one or combinations thereof.
• the content thereof varies depending on the type, but is, for example, 0.1 to 10% by mass, preferably 0.5% by mass, based on the total mass of the grease composition. ⁇ 5% by mass.
• the grease composition of the present invention is particularly useful as an extreme pressure wear-resistant grease for bearings, gears, automobile parts, industrial machine parts, etc., which are used under severe lubrication conditions.

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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)

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• 2023
  • 2023-09-07 JP JP2024545708A patent/JPWO2024053702A1/ja active Pending
  • 2023-09-07 US US18/995,710 patent/US20250215347A1/en active Pending
  • 2023-09-07 KR KR1020257004642A patent/KR20250060191A/ko active Pending
  • 2023-09-07 WO PCT/JP2023/032645 patent/WO2024053702A1/ja not_active Ceased
  • 2023-09-07 CN CN202380063783.5A patent/CN119836465A/zh active Pending
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