CN101087868B - Lithium grease composition sealed in a small motor bearing to reduce noise - Google Patents

Lithium grease composition sealed in a small motor bearing to reduce noise Download PDF

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Publication number
CN101087868B
CN101087868B CN2005800251121A CN200580025112A CN101087868B CN 101087868 B CN101087868 B CN 101087868B CN 2005800251121 A CN2005800251121 A CN 2005800251121A CN 200580025112 A CN200580025112 A CN 200580025112A CN 101087868 B CN101087868 B CN 101087868B
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Prior art keywords
grease composition
oil
lithium
synthetic
sealed
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CN101087868A (en
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岩松宏树
秋山元治
宫本康弘
冈村征二
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Minebea Co Ltd
Nippon Grease Co Ltd
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Minebea Co Ltd
Nippon Grease Co Ltd
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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
    • C10M169/02—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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • 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
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • 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
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/0406—Ethers; Acetals; Ortho-esters; Ortho-carbonates 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
    • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
    • C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids 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
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • 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
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C10M2207/2835—Esters of polyhydroxy compounds 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • C10M2209/0606—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • 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
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • 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
    • C10N2030/76—Reduction of noise, shudder, or vibrations
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

The invention relates to a lithium grease composition which can be sealed in a small motor bearing to reduce noise, composed of 5-20 % by weight of a thickener and 95-80 % by weight of a base oil, wherein said grease composition adopts lithium soap as the thickener, which is synthesized from lithium hydroxide and a higher fatty acid with 10 to 20 carbon atoms and/or a higher hydroxyfatty acid with one or more hydroxyl groups and 10 or more carbon atoms, and the base oil includes, as a main component, a polymer ester oil (A) in which 8 or more ester groups are arranged in a comb tooth form on one side of chain molecules constituted by eight or more carbon atoms which is expressed by general formula 1: (In the formula, each of R1 to R4 represents alkyl group, x is a integer which associates the condition: x>=2, and y is a integer which associates the condition: y>=2). The viscosity (40 DEG C) of the base oil is in 25-80 mm<2>/s.

Description

Be sealed in the small size motor bearing to reduce the lithium grease composition of noise
Technical field
The present invention relates to a kind of small size motor that is used for; Especially household electrical appliance such as air conditioning machinery, information equipment are with like hard disk drive etc.; The motor bearing grease composition, be sealed in the small size motor bearing to reduce the noise reduction railway grease of motor noise more specifically to a kind of.
Background technology
The application that is sealed in the railway grease in the bearing generally is known.Prior art is showed a kind of like this grease composition, wherein 8 or more a plurality of ester group be comb teeth and be arranged in by 8 or a side of the oil content subchain formed of more a plurality of carbon atom.This kind railway grease is processed through the urea thickening material is joined in the base oil, and in this base oil, synthetic hydrocarbon oil mixes according to the weight ratio of 0.65～0.75:0.35～0.25 with synthetic ester oil.Referring to Japanese Patent 3514574 and USP 5,910,470.This railway grease is sealed in and supports in the ball bearing that is installed near the pulley the car engine.This kind device changes its rotating speed apace.Use this lubricant and send the problem that the distinctive appearance of blowing a whistle is uttered long and high-pitched sounds when being used in the cold climates in order that solve.
A kind of be sealed in railway grease in the little bearing open among the Japanese publication application number 1994-306383.Wherein, a kind of grease composition is sealed in the bearing.This grease composition is processed through the urea thickening material is joined in the base oil, and in base oil, synthetic hydrocarbon oil mixes according to the weight ratio of 0.65～0.75:0.35～0.25 with synthetic ester oil.
Japanese Patent 3324628 discloses, when noise reduction and damping are sealed in electronic calculator, semi-conductor and make the priority issue of the railway grease in the class bearing of device, and the normal railway grease that adopts reduction noise and moment of torsion.Yet this lithium-soap-ester railway grease has the problem of splash tendency and existence damage recording medium, if intactly use.A kind of improvement noise reduction grease composition that is sealed in the small size motor bearing of technical needs.
Disclosure of the Invention
According to the present invention, a kind of noise reduction grease composition and a kind of sealing bearing that comprises said composition are provided.But this bearing heart is used in the small size motor, and particularly household electrical appliance are used, for example, and the phonomoter of air conditioning machinery, information equipment such as hard disk drive and so on, and be sealed in the small size motor bearing in order to reduce the phonomoter Rotation Noise.The present invention provides a kind of grease composition, comprises 5～20%, is preferably greater than 5% and less than the agent of 20wt% lithium soap-thickened.This thickening material is by Lithium Hydroxide MonoHydrate and 10～20 carbon atom higher fatty acid or have 1 or a plurality of oh group and 10 or the senior hydroxy fatty acid of high carbon atom number more, or the two, synthetic.Satisfying is, this lithium soap-thickened agent accounts for about 7.5%～about 17.5wt% of grease composition, preferred about 10%～about 15%, and particularly about 12%～about 13wt%.
Railway grease of the present invention also comprises 95～80wt% base oil.As a kind of component of this ester oil be a kind of polymkeric substance ester oil, preferably exist, but heart exists with 20% or higher quantity of base oil weight with considerable quantity.This polymer base oil have 8 or more a plurality of ester group be arranged in a side of molecular chain with comb teeth, represent with following general formula
Figure S05825112120070129D000021
General formula 1
R wherein 1, R 2, R 3And R 4Each represents alkyl group, x is that integer and the y that satisfies x>=2 is the integer that satisfies y>=2, and should basis oil viscosity (40 ℃) between 25～80mm 2/ s.The grease composition that obtains has the good affinity of bearing element and has excellent anti-acoustic capability.
In the present invention aspect another, base oil by, except polymkeric substance ester oil, 1 or multiple oil constitute.According to the present invention, base oil comprises the polymkeric substance ester oil of general formula 1 as its important component, preferably accounts for the 20wt% of base oil or higher.Polymkeric substance ester oil (A) should be included as the important component of base oil, more particularly, except polymkeric substance ester oil (A), also can comprise synthetic ester oil (B), one or more of synthetic hydrocarbon oil (C) and synthetic ether oil (D).
In addition, according to the present invention, preferably this polymkeric substance ester oil (A) accounts for 20～50wt% of whole grease composition, and synthetic ester oil (B) accounts for 10～45wt% of whole grease composition, and synthetic hydrocarbon oil (C) accounts for 5～45wt% of whole grease composition.
According to the present invention; The lithium soap-thickened agent can be the mixture of 12-oxystearic acid lithium soap and straight chain fatty acid lithium soap; Wherein 12-oxystearic acid lithium soap accounts for 2.5～10wt% of whole grease composition, and the straight chain fatty acid lithium soap accounts for 2.5～10wt% of whole grease composition simultaneously.
In addition, according to the present invention, inhibitor, anticorrosive agent and so on also can be as additives in joining grease composition.
The grease composition that is sealed in the small size motor bearing that obtains has excellent acoustical behavior, reduces moment of torsion, reduces evaporable effect and long life.
The preferred embodiment of the invention will be explained in an embodiment.Yet, spell out, the present invention should be confined to these explanation embodiments fully.
The mode of embodiment of the present invention
According to the present invention, a kind of noise reduction grease composition and the sealing bearing that contains said composition are provided.But this bearing heart is used for domestic electronic utensil such as use in refrigeration system phonomoter, information equipment such as hard disk drive with phonomoter and so on, and is sealed in the small size motor bearing, in order to reduce the Rotation Noise of phonomoter.The present invention provides a kind of grease composition, comprises 5～20%, is preferably greater than 5% and less than the agent of 20wt% lithium soap-thickened.This thickening material is by the higher fatty acid of Lithium Hydroxide MonoHydrate and 10～20 carbon atoms or have 1 or a plurality of oh group and 10 or the senior hydroxy fatty acid of more a plurality of carbon atoms, or the two, synthetic.According to the present invention; But the lithium soap heart can be the mixture of 12-oxystearic acid lithium soap and straight chain fatty acid lithium soap; Wherein 12-oxystearic acid lithium soap accounts for 2.5～10wt% of whole grease composition, and the straight chain fatty acid lithium soap accounts for 2.5～10wt% of whole grease composition.In the present invention, if lithium soap accounts for the 5%wt% that is less than of whole grease composition, then railway grease will become rare, and if lithium soap accounts for the 20wt% that surpasses of whole grease composition, then railway grease will become feeding-up.Satisfying is that the lithium soap-thickened agent accounts for about 7.5%～about 17.5wt% of grease composition, preferably accounts for about 10%～about 15wt% of grease composition, particularly about 12%～about 13wt%.
This railway grease also comprises 95～80wt% base oil.A kind of component of base oil is a polymkeric substance ester oil, preferably exist with remarkable quantity, but heart exists with 20% or higher quantity of base oil weight.Polymer base oil have 8 or more a plurality of ester group be arranged in a side of molecular chain with comb teeth, represent with following general formula 1
Figure S05825112120070129D000031
R wherein 1, R 2, R 3And R 4Each represents alkyl group, x is that integer and the y that satisfies x>=2 is the integer that satisfies y>=2.
This basis oil viscosity (40 ℃) is preferably between 25～80mm 2/ s.Preferably, the molecular weight of the polymer esters oil ingredient of general formula 1 between 1000～3000 and viscosity (40 ℃) between 100～245mm 2/ s.The grease composition that obtains has the good affinity of bearing element and has excellent anti-acoustic capability.
In the present invention aspect another, base oil, except polymkeric substance ester oil of the present invention, also by 1 or multiple oil form.According to the present invention, base oil comprises the polymkeric substance ester oil of general formula 1 as important component, preferably accounts for the 20wt% of base oil or higher.
In polymkeric substance ester oil (A) should be included in as the important component of base oil, more particularly, except polymkeric substance ester oil (A), but heart also comprised synthetic ester oil (B), synthetic hydrocarbon oil (C) and synthetic ether oil (D) one or more.Satisfying is that the molecular weight of polymkeric substance ester oil is between 1000-3000, and viscosity (40 ℃) is between 100～245mm 2/ s, and final basic oil viscosity (40 ℃) is between 25～80mm 2/ s.
The synthetic ester oil (B) that the present invention uses but heart represent with general formula (a) and (b) as follows or (c).
So a kind of synthesis of diester oil with general formula (a) expression can be used as (B):
(a)RCOO(CH 2) nCOOR′
(wherein R and R ' represent the alkyl group of 3～18 carbon atoms and can be same to each other or different to each other, and n is 3～12);
A kind of synthetic three ester oils with general formula (b) expression can be used as (B):
(b)R(CH 2COOR′) 3
(wherein R and R ' represent the alkyl group of 3～10 carbon atoms);
A kind of synthetic four ester oils with general formula (c) expression can be used as (B):
(c)R(CH 2COOR′) 4
(wherein R and R ' represent the alkyl group of 3～10 carbon atoms);
And
Other synthetic neopentyl polyol ester can use.
Preferably, synthetic ester oil (B) exists with the quantity of 10～45wt% of whole grease composition.
Synthetic hydrocarbon oil of the present invention (C) can be selected from various hydrocarbon ils.A kind of preferred hydrocarbon ils is poly-alpha-olefin oil or a kind of polybutylenes and olefin copolymer, and its viscosity (40 ℃) is between 20～100mm 2/ s person.For safety, preferably adopt burning-point to be equal to or higher than 220 ℃ synthetic hydrocarbon oil.But the synthetic hydrocarbon oil heart has such structure, and wherein terminal olefin is through a kind of oligopolymer of oligomeric generation, and hydrogen adds on its terminal double bond.Its a kind of typical structure formula can be represented as follows:
Figure S05825112120070129D000051
(wherein R represents alkyl group, and n represents 1～6 integer).Polybutylenes can utilize aluminum chloride to generate as polymerization catalyst through the parent material that mainly comprises iso-butylene.This polybutylenes can use or re-use behind the hydrogenation above that in former feud.Preferably, the synthetic hydrocarbon oil (C) of the present invention's use preferably accounts for 5～45wt% of whole grease composition.
The synthetic ether oil (D) that the present invention adopts, alkyl diphenyl base ether preferably, for example, dialkyl diphenyl ether, monoalkyl diphenyl ether, its mixture etc.Preferably, the synthetic ether oil (D) of the present invention's use accounts for 10～45wt% of whole grease composition.Final basic oil viscosity (40 ℃) but heart between 25～80mm 2/ s.
According to the present invention preferably, polymkeric substance ester oil (A) accounts for 20～50wt% of whole grease composition, and synthetic ester oil (B) accounts for 10～45wt% of whole grease composition, and synthetic hydrocarbon oil (C) accounts for 5～45wt% of whole grease composition.
Alternatively; According to the present invention satisfying be; Polymkeric substance ester oil (A) accounts for 20～50wt% of whole grease composition; Synthetic ester oil (B) accounts for 10～45wt% of whole grease composition, and synthetic hydrocarbon oil (C) accounts for 5～15wt% of whole grease composition, and synthetic ether oil (D) accounts for 10～45wt% of whole grease composition.
Grease composition of the present invention can comprise various additive commonly used in railway grease.Examples of such additives comprises inhibitor, for example, and phenyl-α (β)-ALPHA-NAPHTHYL AMINE, alkyl diphenyl base amine, thiodiphenylamine, tert-butyl phenol etc., and anticorrosive agent such as metal sulfonate, nonionic anticorrosive agent, amine anticorrosive agent etc.
The grease composition that the present invention who obtains is sealed in the small size motor bearing has excellent acoustical behavior, reduces moment of torsion, reduces evaporable performance and long life.
Below object lesson will be discussed; Yet the present invention will not receive the restriction of these various embodiment.
The embodiment of the invention 1～13
As thickening material, adopt a kind of by Lithium Hydroxide MonoHydrate, Triple Pressed Stearic Acid and 12-oxystearic acid synthetic lithium soap.
As base oil, adopt a kind of viscosity (40 ℃) to be about 140mm 2The polymkeric substance ester oil of/s.As synthetic ester oil, adopt a kind of four ester oils and/or diester oil.DOS (Diisooctyl Sebacate) commonly used is as diester oil, and employing PE (pentaerythritol ester) is as four ester oils.
As synthetic hydrocarbon oil, adopt poly-alpha-olefin oil.
As synthetic ether oil, adopt alkyl diphenyl base ether oil.
Alkyl diphenyl base amine is used as inhibitor, and calcium sulphonate is as anticorrosive agent simultaneously.
All components are mixed according to the ratio shown in the table 1, and are heated to 220～230 ℃, keep stirring therebetween until whole mixture fluidify.This solution is poured in the stainless steel vessel, until the degree of depth that forms 3～5mm, and is cooled to 50 ℃ or lower.Through its homogenizing being obtained a kind of grease composition with three-roll grinder.The component ratio and the test-results of this grease composition are stated from table 1.
Comparative Examples 1～6
According to the mode identical, prepare Comparative Examples compsn 1～4 through mixing all components with the embodiment of the invention 1～13.In addition, 2 kinds of available commercial railway grease with known base oil and thickening material are used as Comparative Examples 5 and 6, and are as shown in table 2.In table 2, symbol ++ point out the component of being sneaked into.
These mixtures embodiment and test-results thereof are stated from table 2.
Table 2
Figure S05825112120070129D000081
The mixture denseness obtains according to JIS K22207, and dropping point then obtains according to JIS K22208.In the bearing characteristics test; Railway grease component to be tested is sealed in the little bearing; And in their driving torque of room temperature measuring and acoustical behavior; And measure its driving torque and acoustical behavior at room temperature, and, the 1000h bearing measuring its volatile quantity and acoustical behavior (acoustics life-span) under 100 ℃ of free air temperatures and the rotation frequency 3000rpm condition after rotating test.About acoustical behavior, adopt Anderon (Anderson) appearance measure bearing rotate before the test with after Anderon (Anderson) value.Driving torque is adopting torque tester under 3000rpm, to measure under 2kg load, the room temperature.As volatile quantity, take by weighing the weight that bearing rotates the test front and back bearings, and obtain weight difference.About the assessment result of each sample, be listed in table 1 (embodiment) and the table 2 (Comparative Examples) according to the evaluation result that the desired performance of motor bearing grease composition is made.Less Anderon value shows that acoustical behavior is better, and lower moment of torsion and less volatile quantity be better performances then.Evaluation is made according to the 4-grade standard." A " is excellent especially, and " B " is excellent, and " C " is general, and " D " is poor.The unit of base oil viscosity is mm 2/ s.
The lithium grease composition that the present invention is sealed in the small size motor bearing contributes to long bearing life and maintenance low noise properties.Therefore, it is a kind of ecological friendly railway grease, estimates the possibility that heavy demand is arranged and have various industrial application.
Explain that more than should be regarded as only is illustrating principle of the present invention.In addition; In view of those skilled in the art will envision that various modification and variation, therefore do not plan the present invention and be confined to concrete structure and the operation that top institute shows and describes, in view of the above; Admissible all suitable modification and Equivalents, they all belong within the scope of the invention.

Claims (56)

1. one kind is sealed in the small size motor bearing to reduce the lithium grease composition of noise, comprises:
A) arrive less than the agent of 20wt% lithium soap-thickened greater than 5%, said thickening material is synthetic by Lithium Hydroxide MonoHydrate and following component:
I) Triple Pressed Stearic Acid or
Ii) 12-oxystearic acid, or
Iii) i and ii;
B) 95～80wt% base oil, said base oil comprises polymkeric substance ester oil, wherein 8 or more a plurality of ester group be arranged in a side of molecular chain with comb teeth, represent with general formula 1
Figure FSB00000427678100011
General formula 1
R wherein 1, R 2, R 3And R 4Each represents alkyl group, and x is the integer that satisfies x>=2, and y is the integer that satisfies y>=2,
And said base oil 40 ℃ viscosity between 25～80mm 2/ s.
2. claim 1 is sealed in the small size motor bearing to reduce the lithium grease composition of noise, also to comprise the said base oil that comprises synthetic ester oil.
3. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 1 also comprises the said base oil that comprises synthetic hydrocarbon oil.
4. claim 1 is sealed in the small size motor bearing to reduce the lithium grease composition of noise, also to comprise the said base oil that comprises synthetic ether oil.
5. claim 2 is sealed in the small size motor bearing to reduce the lithium grease composition of noise, also to comprise the said base oil that comprises synthetic ether oil.
6. claim 3 is sealed in the small size motor bearing to reduce the lithium grease composition of noise, also to comprise the said base oil that comprises synthetic ether oil.
7. claim 3 is sealed in the small size motor bearing to reduce the lithium grease composition of noise, also to comprise the said base oil that comprises synthetic ester oil.
8. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 1, wherein base oil comprises one or more oil that are selected from synthetic ester oil, synthetic hydrocarbon oil and the synthetic ether oil.
9. claim 8 is sealed in the small size motor bearing to reduce the lithium grease composition of noise; Wherein polymkeric substance ester oil accounts for 20～50wt% of whole grease composition; Synthetic ester oil accounts for 10～45wt% of whole grease composition, and synthetic ether oil accounts for 10～45wt% of whole grease composition.
10. claim 8 is sealed in the small size motor bearing to reduce the lithium grease composition of noise; Wherein polymkeric substance ester oil accounts for 20～50wt% of whole grease composition; Synthetic ester oil accounts for 10～45wt% of whole grease composition, and synthetic hydrocarbon oil accounts for 5～45wt% of whole grease composition.
11. being sealed in the small size motor bearing of claim 8 to reduce the lithium grease composition of noise; Wherein said polymkeric substance ester oil accounts for 20～50wt% of whole grease composition; Said synthetic ester oil accounts for 10～45wt% of whole grease composition; Said synthetic hydrocarbon oil accounts for 5～15wt% of whole grease composition, and said synthetic ether oil accounts for 10～30wt% of whole grease composition.
12. any one is sealed in the small size motor bearing to reduce the lithium grease composition of noise in the claim 1～8; Wherein said lithium soap is the mixture of 12-oxystearic acid lithium soap and Triple Pressed Stearic Acid lithium soap; Wherein 12-oxystearic acid lithium soap accounts for 2.5～10wt% of whole grease composition, and said Triple Pressed Stearic Acid lithium soap accounts for 2.5～10wt% of whole grease composition.
13. any one be sealed in the small size motor bearing reducing the lithium grease composition of noise in the claim 1～8, wherein said grease composition also comprise inhibitor or anticorrosive agent or inhibitor and anticorrosive agent the two.
14. any one be sealed in the small size motor bearing to reduce the lithium grease composition of noise in the claim 1～8, wherein said polymkeric substance ester oil exists with the quantity of 20～50wt% of said railway grease.
15. any one is sealed in the small size motor bearing to reduce the lithium grease composition of noise, wherein at b in the claim 1～8) in, said polymkeric substance ester oil exists with the 20wt% of said base oil or higher remarkable quantity.
16. any one is sealed in the small size motor bearing to reduce the lithium grease composition of noise, wherein at b in the claim 1～8) in, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
17. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 8, wherein said synthetic ester oil is
(a) synthesis of diester of following general formula oil:
RCOO(CH 2) nCOOR′
Wherein R and R ' represent the alkyl group of 3～18 carbon atoms and can be same to each other or different to each other, and n is 3～12;
(b) synthetic three ester oils of following general formula:
R(CH 2COOR′) 3
Wherein R and R ' represent the alkyl group of 3～10 carbon atoms;
(c) synthetic four ester oils of following general formula:
R(CH 2COOR′) 4
Wherein R and R ' represent the alkyl group of 3～10 carbon atoms; Perhaps
(d) synthetic neopentyl polyol ester oil.
18. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 8, wherein said synthetic hydrocarbon oil is poly-alpha-olefin oil or polybutylenes and olefin copolymer, its 40 ℃ viscosity between 20～100mm 2/ s.
19. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 8, wherein said synthetic ether oil is an alkyl diphenyl base ether.
20. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 19, wherein said synthetic ether oil is dialkyl diphenyl ether, monoalkyl diphenyl ether or its mixture.
21. any one be sealed in the small size motor bearing to reduce the lithium grease composition of noise in the claim 1～9, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
22. any one be sealed in the small size motor bearing to reduce the lithium grease composition of noise in the claim 1～9, wherein the lithium soap-thickened agent is between 10%～15wt%.
23. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 10, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
24. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 10, wherein the lithium soap-thickened agent is between 10%～15wt%.
25. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 11, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
26. being sealed in the small size motor bearing to reduce the lithium grease composition of noise of claim 11, wherein the lithium soap-thickened agent is between 10%～15wt%.
27. being sealed in the small size motor bearing of claim 23) to reduce the lithium grease composition of noise, wherein at b, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
28. being sealed in the small size motor bearing of claim 25) to reduce the lithium grease composition of noise, wherein at b, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
29. a lithium grease composition comprises:
A) arrive less than the agent of 20wt% lithium soap-thickened greater than 5%, said thickening material is synthetic by Lithium Hydroxide MonoHydrate and following component:
I) Triple Pressed Stearic Acid or
Ii) 12-oxystearic acid, or
Iii) i and ii;
B) 95～80wt% base oil, said base oil comprises polymkeric substance ester oil, wherein 8 or more a plurality of ester group be arranged in a side of molecular chain with comb teeth, represent with general formula 1
Figure FSB00000427678100041
R wherein 1, R 2, R 3And R 4Each represents alkyl group, and x is the integer that satisfies x>=2, and y is the integer that satisfies y>=2,
And said base oil 40 ℃ viscosity between 25～80mm 2/ s.
30. the lithium grease composition of claim 29 also comprises the said base oil that comprises synthetic ester oil.
31. the lithium grease composition of claim 29 also comprises the said base oil that comprises synthetic hydrocarbon oil.
32. the lithium grease composition of claim 29 also comprises the said base oil that comprises synthetic ether oil.
33. the lithium grease composition of claim 30 also comprises the said base oil that comprises synthetic ether oil.
34. the lithium grease composition of claim 31 also comprises the said base oil that comprises synthetic ether oil.
35. the lithium grease composition of claim 31 also comprises the said base oil that comprises synthetic ester oil.
36. the lithium grease composition of claim 29, wherein base oil comprises one or more oil that are selected from synthetic ester oil, synthetic hydrocarbon oil and the synthetic ether oil.
37. the lithium grease composition of claim 36, wherein polymkeric substance ester oil accounts for 20～50wt% of whole grease composition, and synthetic ester oil accounts for 10～45wt% of whole grease composition, and synthetic ether oil accounts for 10～45wt% of whole grease composition.
38. the lithium grease composition of claim 36, wherein polymkeric substance ester oil accounts for 20～50wt% of whole grease composition, and synthetic ester oil accounts for 10～45wt% of whole grease composition, and synthetic hydrocarbon oil accounts for 5～45wt% of whole grease composition.
39. the lithium grease composition of claim 36; Wherein polymkeric substance ester oil accounts for 20～50wt% of whole grease composition; Said synthetic ester oil accounts for 10～45wt% of whole grease composition; Said synthetic hydrocarbon oil accounts for 5～15wt% of whole grease composition, and said synthetic ether oil accounts for 10～30wt% of whole grease composition.
40. the lithium grease composition of any one in the claim 29～36; Wherein said lithium soap is the mixture of 12-oxystearic acid lithium soap and Triple Pressed Stearic Acid lithium soap; Wherein 12-oxystearic acid lithium soap accounts for 2.5～10wt% of whole grease composition, and said Triple Pressed Stearic Acid lithium soap accounts for 2.5～10wt% of whole grease composition.
41. the lithium grease composition of any one in the claim 29～36, wherein said grease composition also comprise inhibitor or anticorrosive agent or inhibitor and anticorrosive agent the two.
42. the lithium grease composition of any one in the claim 29～36, wherein said polymkeric substance ester oil exists with the quantity of 20～50wt% of said railway grease.
43. the lithium grease composition of any one in the claim 29～36 is wherein at b) in, said polymkeric substance ester oil exists with the 20wt% of said base oil or higher remarkable quantity.
44. the lithium grease composition of any one in the claim 29～36 is wherein at b) in, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
45. the lithium grease composition of claim 36, wherein said synthetic ester oil is
(a) synthesis of diester of following general formula oil:
RCOO(CH 2) nCOOR′
Wherein R and R ' represent the alkyl group of 3～18 carbon atoms and can be same to each other or different to each other, and n is 3～12;
(b) synthetic three ester oils of following general formula:
R(CH 2COOR′) 3
Wherein R and R ' represent the alkyl group of 3～10 carbon atoms;
(c) synthetic four ester oils of following general formula:
R(CH 2COOR′) 4
Wherein R and R ' represent the alkyl group of 3～10 carbon atoms; Or
(d) synthetic neopentyl polyol ester oil.
46. the lithium grease composition of claim 36, wherein said synthetic hydrocarbon oil are poly-alpha-olefin oil or polybutylenes and olefin copolymer, its 40 ℃ viscosity between 20～100mm 2/ s.
47. the lithium grease composition of claim 36, wherein said synthetic ether oil are alkyl diphenyl base ether.
48. the lithium grease composition of claim 47, wherein said synthetic ether oil are dialkyl diphenyl ether, monoalkyl diphenyl ether or its mixture.
49. the lithium grease composition of any one in the claim 29～37, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
50. the lithium grease composition of any one in the claim 29～37, wherein the lithium soap-thickened agent is between 10%～15wt%.
51. the lithium grease composition of claim 38, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
52. the lithium grease composition of claim 38, wherein the lithium soap-thickened agent is between 10%～15wt%.
53. the lithium grease composition of claim 39, wherein the lithium soap-thickened agent is between 7.5%～17.5wt%.
54. the lithium grease composition of claim 39, wherein the lithium soap-thickened agent is between 10%～15wt%.
55. the lithium grease composition of claim 51 is wherein at b) in, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
56. the lithium grease composition of claim 53 is wherein at b) in, the molecular weight of said polymkeric substance ester oil between 1000～3000 and 40 ℃ viscosity between 100～245mm 2/ s.
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