CN103347989A - Polymer thickened grease compositions and their use - Google Patents

Polymer thickened grease compositions and their use Download PDF

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Publication number
CN103347989A
CN103347989A CN2010800711709A CN201080071170A CN103347989A CN 103347989 A CN103347989 A CN 103347989A CN 2010800711709 A CN2010800711709 A CN 2010800711709A CN 201080071170 A CN201080071170 A CN 201080071170A CN 103347989 A CN103347989 A CN 103347989A
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Prior art keywords
grease composition
metal
composition
grease
acid
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D.梅杰
D.马勒
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SKF AB
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SKF AB
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating 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
    • C10M169/06Mixtures of thickeners and additives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/085Phosphorus oxides, acids or salts
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/0213Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as thickening agents
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125Carboxylix 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
    • C10M2207/126Carboxylix 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
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125Carboxylix 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
    • C10M2207/128Carboxylix 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
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/16Naphthenic acids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10Amides of carbonic or haloformic acids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/12Partial amides of polycarboxylic acids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/02Groups 1 or 11
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/04Groups 2 or 12
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/08Groups 4 or 14
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/10Groups 5 or 15
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/14Group 7
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/16Groups 8, 9, or 10
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/02Bearings
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10Semi-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)
  • Lubricants (AREA)

Abstract

The invention provides a grease composition comprising: (a) a polymer thickened grease; (b) an acid having a pKa in the range of 2-7 wherein the pKa is measured in water at 25 DEG C; and (c) a metal salt. The invention further provides a mechanical component having a metal surface onto which a layer of the grease composition according to the invention has been applied. In addition, the invention relates to the use of the present grease composition for reconditioning the lubrication of a mechanical component having a metal surface; and the use of the present grease composition for protecting a mechanical component having a metal surface against corrosion, wear or anti-fretting. The invention also relates to a method for preparing the present grease composition.

Description

Polymkeric substance multiviscosisty grease composition and uses thereof
Invention field
The present invention relates to grease composition (grease composition); Bearing, bearing element or bearing application system (bearing application system) with the metallic surface that has applied the grease composition layer on it; Grease composition of the present invention is used for repairing the purposes of (reconditioning) mechanical organ lubricated (lubrication); And grease composition of the present invention is avoided the purposes of corrosion (corrosiong), wearing and tearing (wear) or abrasion (fretting), and the method for preparing grease composition of the present invention for the protection of mechanical organ.
Background of invention
Polymkeric substance multiviscosisty lubricating grease (polymer thickened lubricating grease) and preparation thereof are well known in the prior art.At US3, the lubricating grease that comprises by the white mineral oil of ethylene copolymer and homopolymer polypropylene multiviscosisty has been described in 392,119.At US3, described in 850,828 and adopted the grease composition that comprises polyethylene and the multiviscosisty of Atactic Polypropylene polyblend.Disclose the polymer viscosifier (polymeric thickener) that is used for grease composition in EP0700986A2, it comprises polypropylene copolymer or the homopolymer with high molecular and the mixture with low-molecular-weight propylene copolymer or homopolymer.Further, the grease composition that comprises at least a polyolefin component, at least a base oil composition and at least a rubber constituent has been described in EP0942063.
These known polymer multiviscosisty grease compositions are with regard to various application, and for example offshore applications (off-shore application) and wind turbine application have still stayed the space of improving.
Summary of the invention
The purpose of this invention is to provide a cover novel polymer multiviscosisty grease composition of avoiding burn into wearing and tearing or abrasion for the protection of mechanical organ.
Another purpose provides for repairing the lubricated novel polymer multiviscosisty grease composition of mechanical organ.
Astoundingly, found by polymkeric substance multiviscosisty lubricating grease is mixed the grease composition that can prepare form the protective layer of very attractive such as the mechanical organ of bearing with acid and metal-salt.
Therefore, the present invention relates to grease composition, it comprises:
(a) polymkeric substance multiviscosisty lubricating grease;
(b) have the acid of pKa in the scope of 2-7, wherein this pKa for 25 ℃, in water, measure; And
(c) metal-salt
The invention still further relates to the mechanical organ such as bearing, bearing element or bearing application system with metallic surface, applied the layer of grease composition in this metallic surface.
In addition, the present invention relates to grease composition of the present invention and be used for repairing the lubricated purposes of tool mechanical organ; And grease composition of the present invention is avoided the purposes of burn into wearing and tearing or abrasion for the protection of mechanical organ.
Further, the invention provides the method for preparing grease composition of the present invention.
Detailed Description Of The Invention
The present invention also provides grease composition, and it comprises: (a) polymkeric substance multiviscosisty lubricating grease; (b) have the acid of pKa in the scope of 2-7, wherein this pKa for 25 ℃, in water, measure; And (c) metal-salt, wherein when this grease composition is applied to the metallic surface of mechanical organ, this metal-salt and this acid-respons and should acid or the acid etching metallic surface that obtains, thus the layer (a layer comprising the metal of the metal salt) of the metal that comprises this metal-salt formed in the metallic surface.
The metal of metal-salt used according to the invention can be selected from multiple metal, and suitably, the metal of this metal-salt is selected from the group that is made of the 1A of periodictable, 1B, 2A, 2B, 4A, 5A, 7B and 8B family element.Preferably, the metal in this metal-salt is selected from by bismuth, zinc, sodium, calcium, magnesium, antimony, barium, manganese, silver, gold, copper and the plumbous group that constitutes.More preferably, the metal in this metal-salt is bismuth or zinc.
Suitably, this metal-salt is selected from the group that is made of naphthenate (naphtenates), octylate, carbaminate (carbamate), methane amide (carboxamides), sulphonamide (sulfonamides), stearate, hydroxyl stearate and any mixture thereof.Preferable alloy salt is stearate, hydroxyl stearate and composition thereof.
Can use various acid preparations at grease composition used according to the invention, condition is that this acid has at least one pKa value in the scope of 2-7, wherein this pKa be 25 ℃, in water, measure.Preferably, employed acid is polyprotonic acid.Suitably in the scope of 2-10, have two pKa values according to polyprotonic acid used in the present invention, preferably in the scope of 2-8, have two pKa values, wherein this pKa for 25 ℃, in water, measure.More preferably this polyprotonic acid is triprotic acid, has three pKa values in the scope of 2-13, wherein this pKa for 25 ℃, in water, measure.Most preferably this triprotic acid is phosphoric acid.
Comprise lubricant base and polymer viscosifier according to polymkeric substance multiviscosisty lubricating grease used in the present invention.In grease composition of the present invention, preferably only use polymer viscosifier, and do not use conventional soap-metal-salt thickening material to make.Yet, this type of conventional thickening material can be introduced in the grease composition of the present invention, as long as it can influence the bulk properties of grease composition sharply.
The metal-salt that uses according to the present invention is not used as thickening material as can be seen.The metal-salt that uses according to the present invention is added to by polymkeric substance fully in the grease composition of multiviscosisty.This metal-salt is as various objectives, namely with acid-respons to form the layer of the metal that comprises metal-salt in the metallic surface.
Grease composition of the present invention suitably comprises:
(a) lubricant base of 1-99wt%;
(b) polymer viscosifier of 1-30wt%;
(c) acid of 0.01-10wt%; And
(d) the containing metal compound of 0.01-40wt% (metal containing compound),
All wt per-cent is based on the gross weight of grease composition.
The weight percent of acid is 85% concentration based on related acid.
Preferably, grease composition of the present invention comprises:
(a) lubricant base of 10-95wt%;
(b) polymer viscosifier of 5-15wt%;
(c) acid of 0.5-5wt%; And
(d) the containing metal compound of 1-10wt%,
All wt per-cent is based on the gross weight of grease composition.
In an embodiment of the invention, this grease composition preferably comprises the polymer esters that content range is 0.1-40wt% in addition, based on the gross weight of grease composition.Polymer esters is and the alkene of various types of alcohols esterifications and the multipolymer of dicarboxylic acid.Its range of viscosities suitably is 5mm 2/ s~700mm 2/ s.Suitably, molecular-weight average (Mw) is no more than 7,000 dalton (Dalton), guarantees that this polymer esters is shear stable.Suitable example according to the spendable polymer esters of the present invention comprises diester, polyol ester, monoesters, glycol ester and polyoxyethylene glycol (PEG) ester.This polymer esters is preferably high polarity or low polar polymer ester.
The polymer viscosifier that is used for polymkeric substance multiviscosisty lubricating grease suitably comprises at least a composition that is selected from following group: natural rubber, polypropylene, polyisoprene, polyhutadiene, poly-(styrene butadiene), poly-(ethylene-propylene-diene), urethane, polymethacrylate, polyisobutene, poly-(iso-butylene-Succinic Acid), poly-(iso-butylene-Succinic Acid-polyacrylamide), polyureas and polyethylene.
This polymer viscosifier preferably comprises first composition and second composition, and wherein first composition has than the higher weight-average molecular weight of second composition.Preferably, this polymer viscosifier comprises high molecular weight components and low molecular weight compositions, it is characterized in that this thickening material comprises (1) weight-average molecular weight greater than (altogether-or all-) propene polymer of 200.000 and (2) weight-average molecular weight mixture less than (altogether-or all-) propene polymer of 200.000.
The polymer viscosifier that uses according to the present invention comprises high molecular weight components and low molecular weight compositions, this high molecular weight components comprises weight-average molecular weight greater than 200.000, preferred 200.000-350.000 (altogether-or all-) propene polymer, this low molecular weight compositions comprises weight-average molecular weight less than 100.000, preferred 50.000-100.000 (altogether-or all-) propene polymer.
Weight ratio in the polymer viscosifier between high molecular weight components and the low molecular weight compositions can be 1:40-3:1, suitably is 1:40-1:1, preferred 1:40-1:5, more preferably 1:25-1:15, and 1:18-1:20 most preferably.Weight ratio between high molecular weight components and the low molecular weight compositions is outside this preferable range, then final grease composition will not have the application performance of hope usually, especially mechanical stability and denseness, namely too " tough and tensile/elasticity " and/or too " butter sample (buttery) ".Yet, because the performance of final composition also depends on the additive in lubricant base and the introducing grease composition, and the preparation of compositions mode, so also can use other ratio with the performance of the hope of acquisition final composition, as well-known to those skilled in the art.
According to the present invention, this low molecular weight compositions is preferably homopolymer polypropylene, more preferably as by test ASTM D1238L mensuration has 500-1500dg/min, the homopolymer polypropylene of the melt flow rate (MFR) of special 750-1250dg/min.
High molecular weight components preferably has 1.5-15, more preferably 1.5-7, the especially preferably melt flow rate (MFR) (ASTM D-1238) of 3-5.Low molecular weight compositions is preferably homopolymer polypropylene.Preferably, this high molecular weight components is homopolymer polypropylene or propylene/ethylene-multipolymer,
Usually be used for grease composition with convention amount according to polymer viscosifier of the present invention, i.e. the 1-20 of total grease composition, preferred 5-15, about especially 10 weight %.Can use other amount if need.
Except the polymer viscosifier of above-detailed, grease composition of the present invention also can comprise other polymer viscosifier.
As lubricant base, can the known any lubricating oil of use itself, for example mineral oil of different viscosity, synthin, ester oil, vegetables oil and composition thereof.Can select base oil types and viscosity to adapt to application-specific.
In addition, known additives own can be introduced in the grease composition, as long as they do not have adverse influence to thickener composition, base oil and/or final grease composition.This grease composition can comprise at least a additive component that is selected from the group that is made of antioxidant, inhibiter (corrosion inhibitor), anti-wear agent and pressure tolerance-increase additive (pressure tolerance-increasing additive) in addition, and wherein the total content scope of this additive component (one or more) is 0.2 to 15% weight, and be preferably 1 to 8% weight, based on the gross weight of grease composition.
In an embodiment of the invention, grease composition of the present invention comprises the polymer esters that content range is 1-40wt% in addition, based on the gross weight of grease composition.
Suitably, grease composition of the present invention can comprise inert dust (inert powder) in addition, preferred bortz powder, and its content range is 0.01-10wt%, based on the gross weight of grease composition.
The invention still further relates to bearing, bearing element or bearing application system with metallic surface, applied the layer according to grease composition of the present invention in this metallic surface.
The invention further relates to bearing, bearing element or bearing application system with metallic surface, formed the layer of the metal that comprises metal-salt in this metallic surface.
When grease composition of the present invention during as lubricated purpose; bearing, bearing element or bearing application system can be via this grease composition pre-treatment guaranteeing that it has the protective layer to resistance to wearing, denude or corroding before use, or will form this kind sacrificial metal layer during operation on bearing, bearing element or bearing application system.
One object of the present invention also provides the grease composition of prevention abrasion, wearing and tearing and corrosion.Another object of the present invention provides the lubricated polymkeric substance-multiviscosisty grease composition that has the mechanical organ of metallic surface for reparation.
Therefore, the invention still further relates to the lubricated purposes that is used for repairing the mechanical organ with metallic surface according to grease composition of the present invention.Preferably, the present invention relates to be used for according to grease composition of the present invention the lubricated purposes of reparation bearing, bearing element or bearing application system.When this grease composition be used for to be repaired mechanical organ with metallic surface lubricated, the metal of this metal-salt was preferably bismuth.Under urgent and cas fortuit, before the operation disruption of the device of paying close attention to, grease composition of the present invention will be for this purpose.Grease composition can suitably inject by the device that relates to ignition means (pyrotechnic means) in this case.This type of device is known equally.This device has for example been described in US2010.0101442A1.Described document is incorporated into by reference at this.
The invention further relates to the purposes that grease composition according to the present invention is avoided corroding for the protection of the mechanical organ with metallic surface.Preferably, the present invention relates to grease composition according to the present invention for the protection of the purposes of bearing, bearing element or bearing application system.
The present invention relates to the purposes that grease composition according to the present invention is avoided wearing and tearing for the protection of the mechanical organ with metallic surface in addition.Preferably, the present invention relates to the purposes that grease composition according to the present invention is avoided wearing and tearing for the protection of bearing, bearing element or bearing application system.
In addition, the present invention relates to the purposes that grease composition according to the present invention is avoided denuding for the protection of the mechanical organ with metallic surface.Preferably, the present invention relates to the purposes that grease composition according to the present invention is avoided denuding for the protection of bearing, bearing element or bearing application system.
When this grease composition was avoided wearing and tearing for the protection of the mechanical organ with metallic surface, the metal of this metal-salt was preferably bismuth.This grease composition avoid for the protection of the mechanical organ with metallic surface wearing and tearing and the situation of denuding under, the metal of this metal-salt is preferably bismuth and/or zinc.Under the situation that this grease composition is avoided corroding for the protection of the mechanical organ with metallic surface; this metal-salt metal is preferably zinc; and applied acid is preferably the acid that has pKa in the scope of 2-7, preferably has three pKa values in the scope of 2-13.Preferably, the acid of using then is phosphoric acid.For anticorrosive purpose, this kind grease composition can suitably be applied to corrosion susceptibility and use, transports and store.
In addition, the present invention relates to prepare the method according to grease composition of the present invention, it comprises the following steps:
(a) polymkeric substance multiviscosisty lubricating grease is mixed with metal-salt; And
(b) acid is added in the mixture that obtains in the step (a).
Preferably, in step (a), this metal-salt is heated above its fusing point.
Suitably, in step (a) process, in addition one or more antiwear additives, anti abrasion additives, rut preventives, antioxidant, inert dust (one or more) and/or other additive are become phase-splitting to mix with other.
Preferably, in step (a), use three-roll grinder (three-roll mill) or ball mill finally to mix.
Can be by mixing this polymkeric substance in a manner known way according to polymer viscosifier preparation of compositions of the present invention, it can be chosen wantonly and comprise heating and/or use appropriate solvent.
By known routine techniques itself theme invention polymkeric substance and lubricant base and optional additive are mixed, acquisition is according to grease composition of the present invention.
For avoiding oily oxidation between heating period, the preparation of grease composition is preferably carried out under protective atmosphere (for example nitrogen gas stream).
According to preferred embodiment, solid polymer composition and lubricant base are heated (preferably under agitation) jointly to the temperature that is higher than polypropylene melt point, preferred 190-210 ℃, though can use other temperature if desired.
Polymkeric substance be dissolved in the lubricant base and optional added additive after, lubricating grease is cooled to room temperature from mixing temperature.
According to special preferred implementation of the present invention, this cools off at 1 second-3 minutes, preferred 10 seconds-1 minute, more preferably carries out in the time limit of 25-35 second.This quick process of cooling that forms an importance of the present invention will be expressed as " quenching " (quenching) hereinafter.The quenching of grease composition can be passed through, and for example, grease composition is come down in torrents on metal sheet to carry out, though also can use any other suitable method of cooling, for example spraying.
Quenching process according to the present invention has main influence to grease structure, give the remarkable improvement of final grease composition performance, than traditional lubrication fat and slowly cooling according to lubricating grease of the present invention (for example, by using conventional method of cooling, for example lubricating grease is simply remained on and follow the outer/inner cooling in the reaction vessel, per minute cools off about 1 degree) the two.Above-mentioned situation causes the polymer lubricating fat in the lubricant to lack any mechanical stability.
In grease composition according to the present invention, polymer viscosifier forms the spongy architecture (sponge-like structure) that gives its outward appearance of lubricating grease and structure.Lubricant base remains in the interior poroid space of thickening material structure, and oozes out during lubricating grease uses (service).This thickening material structure is very irregular, has macropore and very little hole.The quenching of foregoing grease composition provides has the more level and smooth and uniform texture more of polymer viscosifier, have for the more uniform distribution space that keeps lubricating oil according to lubricating grease of the present invention.
Between the usage period, oil is from oil/the thickening material structure oozes out on the bearing surface at lubricating grease, thus the lubrication of providing.Oil under grease composition use temperature (that is, the operating temperature of bearing, and " startup " temperature) oozes out characteristic thereby is crucial for the lubrication that obtains composition.
The mechanical stability of lubricating grease depends on employed polymer viscosifier, employed lubricant base and employed additive.Further, the mechanical stability of lubricating grease can be subjected to thickening material and the mixed lubricating grease of lubricant base " processing " influence (working), and those skilled in the art are known as lubricating oil.Preferably, this lubricating grease is " treated " the denseness of wanting and/or needing to its desired use.
Determining of the mechanical stability of lubricating grease can be by test known in the art, for example Shell roller (Shell roll) stability test.Preferably, lubricating grease the stability test of Shell roller (80 ℃, 24 hours, will have maximum 430 infiltration (penetration) after 165rpm).
Consistency of grease can be classified by NLGI-.Lubricating grease can prepare to 00 to 4 NLGI-classification range usually according to the present invention.Can prepare 0 or 00 NLGI-classification, obtain lubricating oil composition.And independent oil viscosity is necessary for acceptable, and is preferably constant.
Polymkeric substance multiviscosisty grease composition according to the present invention can be used for all conventional application of grease composition, as long as the composition of these and grease composition is compatible.Grease composition of the present invention can be used for lubricating bearings, clutch coupling, tooth transmitting gear, skewed slot (chute) or Other Instruments.
Mechanical organ with metallic surface that employing handles according to grease composition of the present invention is preferably bearing, bearing element or bearing application system.Bearing element can be interior ring, outer shroud, cage, roller bearing, spin and sealing pair axial plane (seal-counter face).Bearing application system according to the present invention comprises plumer block, installation shaft, axle, bearing joint and bearing support (shield).
According to for example further being applied as of grease composition of the present invention, agricultural machine, sluice bearing, low noise electric motor, high capacity motor, cooling unit fan, machine tool chief axis (machine tool spindle), worm conveyer and sea and wind turbine application.
The invention further relates to according to the obtainable grease composition of the inventive method.
The viscosity that depends on final grease composition can have the lubricating oil composition form of oiliness or pasty state according to grease composition of the present invention.
The present invention now is further detailed by the following example, and it does not limit the present invention in any way.
Embodiment
Embodiment 1
Multiple lubricating grease is used for the 4-ball wear scar test experiments according to DIN51350/5 (following 1 minute of 1400N).The grease composition that is used for these test experiments is shown in Table 1.These result of experiment are shown in Table 2, and what use in experiment numbers 5 as can be seen is numbering 4 lubricating grease, but has applied the precoated layer of numbering 3 lubricating grease at ball.Form precoated layer in the following way: ball is deoiled with solvent; Ball is immersed in numbering 3 lubricating grease; 85 ℃ of following heat balls 2 hours; Cooling was also stored ball 16 hours at ambient temperature; And with this ball of solvent cleaned/washing.Obviously according to the use of grease composition of the present invention (lubricating grease numbering 3 and 4), when comparing, brought the remarkable improvement of polishing machine with traditional lubrication fat (lubricating grease numbering 1,2 and 4) from test result shown in the table 2.
Table 1
Figure BDA00003624684000091
* the commercial lubricating grease that can purchase
Table 2
Figure BDA00003624684000092
Embodiment 2
Lubricating grease stands Fife according to ASTM D4170 and receives (Fafnir) test in this embodiment, wherein the vibration of the spin in the thrust bearing 22 hours and are observed values of false brinelling (false brinelling) (friction oxidation) by the wearing and tearing in ball-articulating contact.Test result is shown in Table 3.Numbering 5 lubricating grease that use in numbering 6 experiments have following composition: 69% polymer lubricating fat (9% polypropylene and 91% lubricating base oils), 20% friction resistant additive, 5% rut preventives, 5% antiwear additive, the 1% inner standard additive (interne further standard additive) that promotes.In numbering 7 experiments, use identical numbering 5 lubricating grease, but applied the precoated layer of numbering 3 lubricating grease (referring to table 1) at ring.Form precoated layer in the following way: ring is deoiled with solvent; To encircle and immerse in numbering 3 lubricating grease; 85 ℃ of following heating rings 2 hours; Cooling and storage ring 16 hours at ambient temperature; And with this ring of solvent cleaned/washing.From table 3 obviously according to the pre-treatment (experiment numbers 7) of test bearing ring of the present invention, when with without building the layer numbering pretreated lubricating grease of 3 lubricating grease (experiment numbers 6) when comparing, obtained little a lot of friction oxidation weight loss.
Table 3
Experiment numbers Ring weight loss (mg)
Experiment numbers 6 3
Experiment numbers 7 1
Embodiment 3
Multiple lubricating grease as specified in Table 4 is used for repairing experiment.About noticing in some applications at first that in this respect because the damage of the most important part of machine (for example paper machine), bearing fault can cause expensive.Fault through lubricating bearings also can cause critical failure, and a people can imagine with very quick landing and with the vertiplane that crashes.Therefore, in the definite term that vertiplane can land safely/land, face under the situation of upcoming fault, or paper machine can not give the enough time of operator with the situation that in the control step, stops to produce under, bearing and lubricatedly can be repaired Shi Qike rescue life and cost.
Measuring lubricating grease in the aircraft simulation mechanism for testing of laboratory.Purpose is to repair bearing at least 60 minutes.Use following condition:
-bearing speed: 10000rpm (interior ring)
-load: 400daN; Ball/IR:2000MPa; Ball/OR:1600MPa
-initial lubricating grease (in the running): lubricating grease film in the running,<0.1g
The lubricating grease that is used for during-fault repairing injects: about 150 ℃ down manual (reading from registering instrument).When indication fault, the lubricating grease of paying close attention to is added in the oiling system of initial existence.
Experimental result is presented in the table 5.From table 5 obviously according to grease composition of the present invention (experiment numbers 10), when with traditional lubrication fat (experiment numbers 8 and 9) when comparing, can repair initial oiling system in the mode of suitable improvement, because it can make the longer time of oiling system existence, and needs the amount of lubricating grease little a lot of simultaneously.
Table 4
Figure BDA00003624684000111
* the commercial lubricating grease that can purchase
Table 5
Figure BDA00003624684000112

Claims (34)

1. grease composition, it comprises:
(a) polymkeric substance multiviscosisty lubricating grease;
(b) have the acid of pKa in the scope of 2-7, wherein this pKa 25 ℃, in water, measure; And
(c) metal-salt.
2. according to the grease composition of claim 1, wherein when grease composition is applied to the metallic surface of mechanical organ, metal-salt and acid-respons and acid or the acid etching metallic surface that obtains, thus the layer of the metal that comprises this metal-salt formed in the metallic surface.
3. according to the grease composition of claim 1 or 2, wherein the metal of metal-salt is selected from the group that 1A, 1B, 2A, 2B, 4A, 5A, 7B and 8B family element by periodictable constitute.
4. according to each grease composition among the claim 1-3, it comprises:
(a) lubricant base of 1-99wt%;
(b) polymer viscosifier of 1-20wt%;
(c) acid of 0.01-10wt%; And
(d) the containing metal compound of 0.01-40wt%,
All wt per-cent is based on the gross weight of grease composition.
5. according to each grease composition among the claim 1-4, it comprises the polymer esters that content range is 0.1-40wt% in addition, based on the gross weight of grease composition.
6. according to each grease composition among the claim 1-5, wherein acid is the polyprotonic acid that has two pKa values in the scope of 2-10.
7. according to each grease composition among the claim 1-6, wherein acid is phosphoric acid.
8. according to each grease composition among the claim 1-7, wherein polymer viscosifier comprises at least a composition that is selected from following group: natural rubber, polypropylene, polyisoprene, polyhutadiene, poly-(styrene butadiene), poly-(ethylene-propylene-diene), urethane, polymethacrylate, polyisobutene, poly-(iso-butylene-Succinic Acid), poly-(iso-butylene-Succinic Acid-polyacrylamide), polyureas and polyethylene.
9. according to each grease composition among the claim 1-8, wherein polymer viscosifier comprises first composition and second composition, and wherein first composition has than the higher weight-average molecular weight of second composition.
10. according to the grease composition of claim 9, wherein polymer viscosifier comprises high molecular weight components and low molecular weight compositions, wherein, thickening material comprises (1) weight-average molecular weight greater than (altogether-or all-) propene polymer of 200000 and (2) weight-average molecular weight mixture less than (altogether-or all-) propene polymer of 200000.
11. according to the grease composition of claim 10, wherein the weight ratio between high molecular weight components and the low molecular weight compositions is 1:40-1:5, preferred 1:25-1:15, more preferably 1:18-1:20.
12. according to the grease composition of claim 10 or 11, wherein low molecular weight compositions is homopolymer polypropylene.
13. according to each grease composition among the claim 10-12, wherein low molecular weight compositions has 20000 to 100000 molecular-weight average and 500-1500, the melt flow rate (MFR) (ASTM D-1238) of preferred 750-1250.
14. according to each grease composition among the claim 10-13, wherein high molecular weight components is homopolymer polypropylene or propylene/ethylene-multipolymer.
15. according to each grease composition among the claim 10-14, wherein high molecular weight components has molecular-weight average and the 1.5-15 of 200000-350000, the melt flow rate (MFR) (ASTM D-1238) of preferred 1.5-7.
16. according to each grease composition among the claim 1-15, wherein metal-salt is selected from the group that is made of naphthenate, octylate, carbaminate, methane amide, sulphonamide, stearate, hydroxyl stearate and their any mixture.
17. according to the grease composition of claim 16, wherein metal-salt is stearate, hydroxyl stearate or its mixture.
18. according to each grease composition among the claim 1-17, wherein the metal in the metal-salt is selected from by bismuth, zinc, sodium, calcium, magnesium, antimony, barium, manganese, silver, gold, copper and the plumbous group that constitutes.
19. according to the grease composition of claim 18, wherein the metal in the metal-salt is bismuth or zinc.
20. according to each grease composition among the claim 1-19, it comprises the ester oil that content range is 1-40wt% in addition, based on the gross weight of grease composition.
21. according to each grease composition among the claim 1-20, it comprises the inert dust that content range is 1-10wt% in addition, based on the gross weight of grease composition.
22. according to each grease composition among the claim 1-21, it comprises at least a additive component that is selected from by in the group that antioxidant, inhibiter, anti-wear agent and pressure tolerance-the increase additive constitutes in addition, and total content scope 0.2 to 15% weight of additive component wherein, and preferred 1 to 8% weight is based on the gross weight of grease composition.
23. a mechanical organ, it has the metallic surface, and in this metallic surface has applied according to claim 1-22 each grease composition the layer.
24. according to the mechanical organ of claim 23, it has the metallic surface, and has formed the layer that comprises the metal-salt metal in this metallic surface.
25. according to the mechanical organ of claim 22 or 23, it comprises bearing, bearing element or bearing application system.
26. according to the purposes of each grease composition among the claim 1-22, be used for to repair the lubricated of mechanical organ with metallic surface.
27. according to the purposes of each grease composition among the claim 1-22, avoid corrosion for the protection of the mechanical organ with metallic surface.
28. according to the purposes of each grease composition among the claim 1-22, avoid wearing and tearing for the protection of the mechanical organ with metallic surface.
29. according to the purposes of each grease composition among the claim 1-22, avoid abrasion for the protection of the mechanical organ with metallic surface.
30. according to the purposes of each grease composition among the claim 26-29, wherein mechanical organ comprises bearing, bearing element or bearing application system.
31. preparation is according to the method for each grease composition among the claim 1-22, it comprises the following steps:
A) polymkeric substance multiviscosisty lubricating grease is mixed with metal-salt; And
B) acid is joined in the mixture that obtains in the step (a).
32. according to the method for preparing grease composition of claim 31, wherein in step (a), metal-salt is heated above its fusing point.
33. according to the method for claim 31 or 32, it is included in addition and mixes one or more antiwear additives, rut preventives, antioxidant, inert dust and/or other additive in step (a) process.
34. according to each method among the claim 31-33, wherein in step (a), use three-roll grinder or ball mill finally to mix.
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