CN101395257A - Grease composition - Google Patents

Grease composition Download PDF

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Publication number
CN101395257A
CN101395257A CNA2007800077726A CN200780007772A CN101395257A CN 101395257 A CN101395257 A CN 101395257A CN A2007800077726 A CNA2007800077726 A CN A2007800077726A CN 200780007772 A CN200780007772 A CN 200780007772A CN 101395257 A CN101395257 A CN 101395257A
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China
Prior art keywords
grease composition
zinc
sulfide
dithiophosphates
dithiophosphate
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Chinese (zh)
Inventor
尾崎幸洋
沼泽幸一
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Shell Internationale Research Maatschappij BV
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Shell Internationale Research Maatschappij BV
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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
    • 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/22—Compounds containing sulfur, selenium or tellurium
    • 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
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • 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
    • C10M2215/1013—Amides of carbonic or haloformic acids 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate 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
    • 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
    • C10M2223/045—Metal containing thio derivatives
    • 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
    • C10N2020/055—Particles related characteristics
    • C10N2020/06—Particles of special shape or size
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • 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

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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)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

A grease composition comprising base oil, one or more urea thickeners, (A) in the range of from 0.1 to 5 weight% of tungsten disulphide and (B) in the range of from 0.1 to 5 weight% of one or more of zinc dithiophosphates and/or one or more molybdenum dialkyl dithiocarbamates, based on the total weight of the grease composition.

Description

Grease composition
Technical field
The present invention relates to a kind of grease composition, relate to a kind of low-friction lubrication oil/fat composition especially, be suppressed at the wearing and tearing that lubricating component for example produces in bearing or the gear thus.
Background technology
For example need to have the lubricating grease of good friction and wear characteristic in the bearing of the mechanical means in automobile, iron and steel, railway and other industry or the gear.
Especially, for the ball screw that lubrication applications for example wherein exists the constant-velocity joint of automobile of rolling resistance and sliding friction and the driving gear in injection moulding machine or the electric press, this is important.
Traditionally, the lubricating grease that has good lubricity by preparation in the grease composition that molybdenumdisulphide is added lithium soap-thickened.Afterwards in this field, by preparing lubricating grease in the lubricating grease with organic molybdenum and the thickening of zinc dithiophosphate adding urea simultaneously.The lubricating grease of this class urea thickening uses at reducing friction and wear characteristic.For example, the spy opens Japanese patent application No.62-207397 and has described a kind of grease composition that comprises sulphur-Phosphorus extreme-pressure additive, wherein is selected from least a combination with one another in vulcanized oil, olefine sulfide, Tritolyl Phosphate, phosphorodithioic acid trialkyl ester and the zinc dialkyl dithiophosphate as basal component with (a) dialkyldithiocarbamacompositions moly-sulfide with (b).
In addition, the spy opens Japanese patent application No.63-046299 and discloses a kind of grease composition, and wherein additive is that dialkyldithiocarbamacompositions moly-sulfide and molybdenum dithiophosphate and optional zinc dithiophosphate blend simultaneously are in the lubricating grease of urea thickening.
But in some compasss of competency for example in the Japan, for example above-mentioned those of molybdenum grease additive that contain commonly used are defined as restricted material.These chemical substances are owing to the harm to the deleterious effect of people's the health or the ecosystem is restricted (Japanese PRTR Law:Pollutant Release Transfer Register for example; Law for promotion ofChemical Management) and the law by these compasss of competency, may require to contain specified quantity or more the product of any these materials obey MSDS (Material SafetyData Sheet).
In grease composition, use for many years lead compound and antimony compounds also to be defined as the PRTR restricted substances.But these compounds have not almost completely been had the replacements such as sulphur class extreme-pressure additive of these problems.
But above-mentioned molybdenum compound, particularly dialkyldithiocarbamacompositions moly-sulfide have good effect and are difficult to find to be used for the surrogate of molybdenum dialkyldithiocarbamacompositions in reducing friction and wear.In addition, even this surrogate is added in the lubricating grease, also may need its quantity very big to guarantee enough low frictional coefficient.
Known tungsten disulfide is a kind of solid lubricant and is a kind of material that is not defined as the PRTR restricted substances.The spy opens Japanese patent application No.2003-301188 and discloses by the tungsten disulfide adding is contained in polyoxypropylene and the Lithium soap grease of glycidyl ether as base oil, make a kind of powder that is used for Auto-regulating System of Density of Heavy Medium, make when the lubricating grease that uses discharges the floating or sinking of this lubricating grease in water.
Wish very much by avoiding using the molybdenum compound of aforementioned PRTR restriction main body and/or can reducing its usage quantity in this class grease composition and develop a kind of grease composition that applies few environmental pressure with excellent friction and wearing character and better security.
By lubricating grease blend, now develop astoundingly and have the low frictional behaviour and the grease composition of good abrasion resistance tungsten disulfide and zinc dithiophosphate and/or molybdenum dithiocarbamate and urea thickening.
Summary of the invention
Therefore, the invention provides a kind of grease composition, it comprises: base oil, one or more urea thickening materials, based on the tungsten disulfide of (A) 0.1-5wt% of grease composition gross weight and (B) one or more zinc dithiophosphates and/or one or more molybdenum dithiocarbamates of 0.1-5wt%.
In a preferred embodiment of the invention, this grease composition can further comprise (C) one or more molybdenum dithiophosphates.
According to the present invention, use the molybdenum compound be called as the PRTR restricted substances, perhaps its usage quantity can reduce relatively, and can obtain thus at the grease composition that has premium properties and high stability aspect the friction and wear characteristic.
Base oil in the grease composition of the present invention can be selected from mineral oil, vegetables oil and synthetic oil for example ester oil, ether oil or hydrocarbon ils or their mixture expediently.
One or more urea thickening materials in the grease composition of the present invention can be selected from for example single urea of carbamide compound, two ureas, triuret, four ureas or other many ureas.
Two carbamide compounds easily obtain by the reaction of vulcabond and single urea; The reaction that four carbamide compounds can pass through vulcabond, single urea and diamines obtains.
The example that can be used for preparing the vulcabond of described carbamide compound comprises: diphenylmethanediisocyanate, inferior cresyl vulcabond, two inferior cresyl vulcabonds and naphthalene diisocyanate.
In addition, the example that can be used for preparing the monoamine of described carbamide compound comprises octylame, n-Laurylamine, stearylamine, oleyl amine, aniline, para-totuidine and hexahydroaniline.In addition, the example that can be used for preparing the diamines of described carbamide compound comprises quadrol, propylene diamine, butanediamine and phenylenediamine.
In a preferred embodiment, based on the gross weight of described grease composition, grease composition of the present invention can comprise described one or more urea thickening materials that total amount is 1-25wt%.
Grease composition of the present invention can further comprise one or more other thickening materials, for example metallic soap, organic substance or inorganic substance, for example lithium soap, lithium complexing soap, para-phthalic sodium, urea/carbamate compounds and clay.
The tungsten disulfide that is used as aforementioned component (A) in grease composition of the present invention is preferably the median size that obtains by Fisher method (the inferior sifter of the Fisher) powder less than 10 μ m.More preferably, the tungsten disulfide of use is the powder of the about 0.6 μ m of median size that obtains by preceding method.
One or more zinc dithiophosphates that can be used as aforementioned component (B) in grease composition of the present invention can be selected from zinc dialkyl dithiophosphate and/or diaryl zinc dithiophosphate expediently.Preferably, described one or more zinc dithiophosphates can be selected from the compound of formula (I),
Figure A200780007772D00061
Wherein R ' expression uncle or secondary alkyl or aryl, it can be identical or different.Preferably, uncle or secondary alkyl are used as R '.
The object lesson of above-mentioned R ' comprises: methyl, ethyl, propyl group, sec.-propyl, butyl, sec-butyl, isobutyl-, amyl group, the 4-methyl amyl, hexyl, the 2-ethylhexyl, heptyl, octyl group, nonyl, decyl, isodecyl, dodecyl, tetradecyl, hexadecyl, octadecyl, eicosyl, docosyl, tetracosyl, cyclopentyl, cyclohexyl, methylcyclohexyl, the ethyl cyclohexyl, Dimethylcyclohexyl, suberyl, phenyl, tolyl, xylyl, ethylphenyl, the propyl group phenyl, butyl phenyl, the amyl group phenyl, the hexyl phenyl, the heptyl phenyl, octyl phenyl, the nonyl phenyl, decyl phenyl, dodecylphenyl, the tetradecyl phenyl, the hexadecyl phenyl, the octadecyl phenyl, benzyl and styroyl.
The object lesson of above-mentioned primary alkyl zinc dithiophosphate comprises zinc diisopropyl dithiophosphate and diisobutyl zinc dithiophosphate and diiso decyl zinc dithiophosphate.
In addition, the object lesson of above-mentioned secondary zinc dialkyl dithiophosphate comprises that list or two sec-butyl zinc dithiophosphates, list or di-sec-amyl zinc dithiophosphate and single or two-4-methyl-2-diamyl disulfide are for zinc phosphate.
The object lesson of above-mentioned aryl dithio zinc phosphate comprises two-to 4-dodecylphenol zinc dithiophosphate, diheptyl phenol zinc dithiophosphate and two-to the nonyl phenol zinc dithiophosphate.
The preferred example that can be used as one or more molybdenum dialkyldithiocarbamacompositions of component (B) in grease composition of the present invention can be selected from the compound of formula (II),
(R 1R 2N-CS-S) 2Mo 2O mS n (II)
R wherein 1And R 2Can be independently selected from carbon number respectively is the alkyl of 1-24, preferred 3-18, and m is the integer of 0-3, and n is the integer of 1-4, and m+n=4.
The object lesson of above-mentioned one or more molybdenum dialkyldithiocarbamacompositions comprises the diethyldithiocar bamic acid moly-sulfide, dipropyl dithiocarbamic acid moly-sulfide, the dibutyl dithiocaarbamate moly-sulfide, the diamyl dithiocarbamate moly-sulfide, dihexyl dithiocarbamic acid moly-sulfide, dioctyl dithiocarbamic acid moly-sulfide, didecyl dithiocarbamic acid moly-sulfide, two-dodecyl dithiocarbamic acid moly-sulfide, two (butyl phenyl) dithiocarbamic acid moly-sulfide, two (nonyl phenyl) dithiocarbamic acid moly-sulfide, oxygen base diethyldithiocar bamic acid moly-sulfide, oxygen base dipropyl dithiocarbamic acid moly-sulfide, oxygen base dibutyl dithiocaarbamate moly-sulfide, oxygen base diamyl dithiocarbamate moly-sulfide, oxygen base dihexyl dithiocarbamic acid moly-sulfide, oxygen base dioctyl dithiocarbamic acid moly-sulfide, oxygen base didecyl dithiocarbamic acid moly-sulfide, oxygen base two-dodecyl dithiocarbamic acid moly-sulfide, oxygen base (butyl phenyl) dithiocarbamic acid moly-sulfide, oxygen base two (nonyl phenyl) dithiocarbamic acid moly-sulfide, with their mixture.
The object lesson that can be used as aforementioned one or more molybdenum dithiophosphates of optional components (C) in grease composition of the present invention comprising: the diethyldithiophosphoric acid moly-sulfide, dipropyl phosphorodithioic acid moly-sulfide, dibutyl phosphorodithioic acid moly-sulfide, diamyl disulfide is for the phosphoric acid moly-sulfide, dihexyl phosphorodithioic acid moly-sulfide, dioctyl phosphorodithioic acid moly-sulfide, didecyl phosphorodithioic acid moly-sulfide, two-dodecyl phosphorodithioic acid moly-sulfide, two (butyl phenyl) phosphorodithioic acid moly-sulfide, two (nonyl phenyl) phosphorodithioic acid moly-sulfide, oxygen base diethyldithiophosphoric acid moly-sulfide, oxygen base dipropyl phosphorodithioic acid moly-sulfide, oxygen base dibutyl phosphorodithioic acid moly-sulfide, oxygen base diamyl disulfide is for the phosphoric acid moly-sulfide, oxygen base dihexyl phosphorodithioic acid moly-sulfide, oxygen base dioctyl phosphorodithioic acid moly-sulfide, oxygen base didecyl phosphorodithioic acid moly-sulfide, oxygen base two-dodecyl phosphorodithioic acid moly-sulfide, oxygen base (butyl phenyl) phosphorodithioic acid moly-sulfide and oxygen base two (nonyl phenyl) phosphorodithioic acid moly-sulfide.
Said components (A) tungsten disulfide and (B) one or more zinc dithiophosphates and/or one or more molybdenum dithiocarbamates respectively with the amount blend of 0.1-5wt% in grease composition of the present invention.Preferably, based on the gross weight of grease composition, said components (A) and (B) separately with the amount blend of 0.2-3wt% in grease composition of the present invention.If based on the gross weight of grease composition, said components (A) and (B) separately to be less than the amount blend of 0.1wt% then can not obtain low frictional coefficient and can not fully improve frictional wear.In addition, if based on the gross weight of grease composition, said components (A) and (B) to surpass the amount blend of 5wt% then can not found out the further raising of advantageous effects.
One or more molybdenum dithiophosphates (C) can 0.1-5wt%, more preferably the amount of 0.2-3wt% is present in the grease composition of the present invention.
Grease composition of the present invention can further comprise various known additives for example oxidation inhibitor such as amine and/or phenolic antioxidant, extreme-pressure additive is alkene sulfide and/or oily sulfide for example, tackifier are polybutene and/or polymethacrylate for example, solid lubricant is molybdenumdisulphide and/or boron nitride for example, metal-salt for example can be as the sulfonate of rust-preventive agent or structural stabilizing agent, salicylate and/or phenolate and the phosphite and/or the phosphoric acid salt that can be used as extreme pressure/wearing and tearing minimizing agent.
The present invention further provides the friction in a kind of bearing, gear and/or joint that reduces mechanical means and/or the method for wearing and tearing, wherein said method comprises with grease composition as noted before lubricated described bearing, gear and/or joint.
In addition, the present invention also provides a kind of bearing, gear and joint, is characterised in that wherein to use grease composition as noted before as lubricant.
In addition, the present invention also provides grease composition as noted before to be used for the application of lubricating bearings, gear and/or joint.
Embodiment
Below with reference to following examples the present invention is described, the scope that these embodiment do not limit the present invention in any way.
Embodiment
Basic lubricating grease shown in below in three-roll grinder, handling and the grease composition that additive obtains embodiment 1-7 and comparative example 1-8 with the blend composition shown in the table 1-4.
[1] Basic lubricating grease
[1-1] Two urea greases
Under 100 ℃, has about 15mm 2In the refining mineral oil (5400g) of the dynamic viscosity of/s with ditan-4,4 '-reaction of vulcabond (295.2g) and octylame (304.8g) and the two carbamide compound homodisperse that will make obtain basic lubricating grease.The content of carbamide compound is 10wt% in the basic lubricating grease.According to JS-K2220, the denseness of this two urea grease (25 ℃, 60W) be 283 and its dropping point be 263 ℃.
[1-2] Four urea greases
Under 100 ℃, has about 15mm 2In the refining mineral oil (5160g) of the dynamic viscosity of/s with ditan-4,4 '-vulcabond (382.7g), stearylamine (411.4g) and quadrol (46.0g) reaction and the carbamide compound homodisperse that makes obtained basic lubricating grease.The content of carbamide compound is 14wt% in the basic lubricating grease.According to JS-K2220, the denseness of this four urea grease (25 ℃, 60W) be 285 and its dropping point be 202 ℃.
[2] Additive
[2-1] tungsten disulfide (is expressed as WS in table 2): use can be the tungsten disulfide powder of 0.6 μ m by the median size that Nippon Lubricants Ltd. obtains with the trade(brand)name of " Tanmik B ".
[2-2] zinc dithiophosphate (being expressed as Zn-DTP in table): use can be with the additive of trade(brand)name " Lubrizol 1395 " by Lubrizol Inc. acquisition.
[2-3] molybdenum dithiocarbamate (being expressed as Mo-DTC in table): use can be with the additive of trade(brand)name " Molyvan A " by Vanderbilt Inc. acquisition.
[2-4] molybdenum dithiophosphate (being expressed as Mo-DTP in table): use can be with the additive of trade(brand)name " Sakuralube 300 " by Asahi Electrochemical Industries Ltd. acquisition.
[2-5] molybdenumdisulphide (is expressed as MoS in table 2): using the median size of being produced by CLIMAX MOLYBDENUMUK Ltd is the molybdenumdisulphide of 0.7 μ m.
[2-6] graphite (in table, being expressed as graphite): use the graphite of producing by FujiGraphite Ltd with trade mark " FAHN ".
The Falex cut resistance test
Estimate the performance of the grease composition that obtains according to embodiment and comparative example with check and measure the coefficient of wear and the wear resistance (surfaceness of test sample) of these grease compositions by carrying out the Falex cut resistance test.
The Falex cut resistance test based on IP 241 (IP:Institute of Petroleum, UK); The following condition of experimental evidence is carried out to obtain coefficient of wear after off-test.Rmax (μ m) (maximum surfaceness) with the witness mark test sample.
Test conditions
Speed of rotation: 290 ± 10rpm
Temperature: room temperature (about 25 ℃)
Load: 890N (200 1bf)
Time: 15min
The lubricating grease amount of using: about 1g is administered on the test sample
Test-results
The Falex cut resistance test the results are shown in table 1 to table 4.
Table 1
Figure A200780007772D00111
Table 2
Table 3
Figure A200780007772D00113
Table 4
Figure A200780007772D00121
Find out obviously that from table 1 and table 2 embodiment 1-7 shows good wear resistance in the Falex test, show the about 0.056-0.083 of low frictional behaviour-frictional coefficient, the maximum surfaceness of test sample is about 5.9-10.1 μ m.
On the contrary, find out obviously from table 3 and table 4 that the product of comparative example 1-8 shows not satisfied result for frictional coefficient and wear resistance under each situation.
Particularly, comparative example 1,2,5,7 and 8 product have high frictional coefficient and show the big maximum surface roughness value of test sample.Comparative example 3 shows relative low friction co-efficient value with 4 product, but shows the big maximum surface roughness value of test sample; Owing to reducing contact area pressure, the wearing and tearing that increase show low frictional coefficient in these cases according to inferring.In the situation of the product of comparative example 6, the maximum surfaceness of test sample connects and is bordering on embodiment, but this product shows high friction co-efficient value.
In addition, by comparing embodiment and comparative example 7,8 as can be seen, as have with the present invention in the situation of the molybdenumdisulphide of material of the tungsten disulfide identical layer crystalline network used or graphite, even when these when for example Mo-DTC, Mo-DTP or Zn-DTP use, can not obtain to meet the demands in the situation as embodiment and the result of the wear resistance that good low-friction coefficient becomes reconciled is provided.
Therefore, use grease composition of the present invention,, perhaps can realize the reduction of this class molybdenum compound consumption not using molybdenum compound for example can obtain the excellent lubrication effect under the situation of dialkyldithiocarbamacompositions moly-sulfide.

Claims (10)

1. grease composition, it comprises: base oil, one or more urea thickening materials, based on the tungsten disulfide of (A) 0.1-5wt% of grease composition gross weight and (B) one or more zinc dithiophosphates and/or one or more molybdenum dialkyldithiocarbamacompositions of 0.1-5wt%.
2. the grease composition of claim 1, wherein said grease composition further comprises (C) one or more molybdenum dithiophosphates.
3. the grease composition of claim 2, wherein based on the gross weight of grease composition, one or more molybdenum dithiophosphates (C) exist with the amount of 0.1-5wt%.
4. each grease composition of claim 1-3, wherein based on the gross weight of grease composition, described one or more urea thickening materials exist with the total amount of 1-25wt%.
5. each grease composition of claim 1-4, wherein tungsten disulfide (A) is the median size that obtains by the Fisher method powder less than 10 μ m.
6. each grease composition of claim 1-5, wherein one or more zinc dithiophosphates are selected from the compound of formula (I),
Figure A200780007772C00021
Wherein R ' expression uncle or secondary alkyl or aryl, it can be identical or different.
7. each grease composition of claim 1-6, wherein one or more zinc dithiophosphates are selected from: zinc diisopropyl dithiophosphate, diisobutyl zinc dithiophosphate, diiso decyl zinc dithiophosphate, list or two sec-butyl zinc dithiophosphates, list or di-sec-amyl zinc dithiophosphate, list or two-4-methyl-2-diamyl disulfide are for zinc phosphate, two-right-4-dodecylphenol zinc dithiophosphate, diheptyl phenol zinc dithiophosphate and two-right-nonyl phenol zinc dithiophosphate.
8. each grease composition of claim 1-7, wherein one or more molybdenum dithiocarbamates are selected from the compound of formula (II),
(R 1R 2N-CS-S) 2Mo 2O mS n (II)
R wherein 1And R 2Can be independently selected from the alkyl that carbon number is 1-24 respectively, m is the integer of 0-3, and n is the integer of 1-4, and m+n=4.
9. the friction in bearing, gear and/or the joint that reduces mechanical means and/or the method for wearing and tearing, wherein said method comprise each grease composition lubricated described bearing, gear and/or the joint with claim 1-8.
10. each grease composition of claim 1-9 is used for the application of lubricating bearings, gear and/or joint.
CNA2007800077726A 2006-01-27 2007-01-26 Grease composition Pending CN101395257A (en)

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