WO2013038920A1 - Silicone-based lubricant composition and sintered oil-containing bearing impregnated therewith - Google Patents

Silicone-based lubricant composition and sintered oil-containing bearing impregnated therewith Download PDF

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Publication number
WO2013038920A1
WO2013038920A1 PCT/JP2012/072050 JP2012072050W WO2013038920A1 WO 2013038920 A1 WO2013038920 A1 WO 2013038920A1 JP 2012072050 W JP2012072050 W JP 2012072050W WO 2013038920 A1 WO2013038920 A1 WO 2013038920A1
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Prior art keywords
silicone
lubricating oil
silica gel
oil
rust
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PCT/JP2012/072050
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French (fr)
Japanese (ja)
Inventor
光哉 雑賀
斉藤　隆
竹崎　陽二
昌哉 浅利
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株式会社ニッペコ
ポーライト株式会社
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Priority to JP2013533606A priority Critical patent/JP6005648B2/en
Publication of WO2013038920A1 publication Critical patent/WO2013038920A1/en

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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
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/109—Lubricant compositions or properties, e.g. viscosity
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/121—Use of special materials
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C10M2201/105—Silica
    • C10M2201/1056—Silica 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
    • 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
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/223—Five-membered rings containing nitrogen and carbon only
    • 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
    • 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
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/106—Thiadiazoles
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones
    • C10M2229/025—Unspecified siloxanes; Silicones 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C10M2229/0415—Siloxanes with specific structure containing aliphatic substituents 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/042—Siloxanes with specific structure containing aromatic substituents
    • C10M2229/0425—Siloxanes with specific structure containing aromatic substituents 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • C10M2229/051—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen
    • C10M2229/0515—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen used as base material
    • 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
    • C10N2030/02—Pour-point; Viscosity index
    • 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
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/02—Bearings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched

Definitions

  • the present invention relates to a lubricating oil composition for use in, for example, automotive auxiliary machines or electric motors for home appliances, IT, and industrial equipment, and a silicone-based lubricating oil composition whose main component is silicone oil and impregnated with the same
  • the present invention relates to a sintered oil impregnated bearing.
  • silicone oil is one of lubricating oils widely used in various industrial fields because it has excellent thermal stability and oxidation stability and exhibits a high viscosity index.
  • a lubricating oil composition in which lubricity is improved by mixing a silicone oil and a carboxylic acid ester, and an antiwear and / or antioxidant can be added.
  • the lubricating oil composition is used for sintered oil-impregnated bearings, provides stable operating characteristics over a wide temperature range from low temperature to high temperature, and is excellent in lubricity and volatilization resistance. Containing 20 to 90% by weight of a polyorganosiloxane containing an aryl group and having a kinematic viscosity of 10 to 3000 mm 2 / s at 40 ° C. and 80 to 10% by weight of a carboxylic acid ester (see, for example, Patent Document 1) .
  • silicone oil is blended with metallic soap as a thickener to make a grease, which contains a rust inhibitor that does not contain nitrite and organic sulfonate, and contains magnesium compounds and vaporizable rust preventives as essential ingredients.
  • a known bearing grease is known (for example, see Patent Document 2).
  • silicone grease lubricant composition in which silicone oil, silica gel having an average particle diameter of 2 to 15 ⁇ m, and a solid lubricant are mixed.
  • the silicone grease-based lubricant composition is obtained by adding an inorganic thickener and a solid lubricant to a silicone oil as a base oil, and the amount of the silicone oil blended is 50 to 99.8% by weight.
  • the blending amount of the agent is 0.1 to 30% by weight
  • the blending amount of the solid lubricant is 0.1 to 49.9% by weight
  • the silicone oil is selected from dimethylsilicone oil and methylphenylsilicone oil.
  • Hydrophobic fine powder silica gel having a kinematic viscosity of 50 to 1,000,000 mm 2 / sec and an inorganic thickener having pores (see, for example, Patent Document 3).
  • silicone oil is inferior in having lubricity and rust preventive properties, and it is desired that these defects be improved by supplementing additives. Due to poor compatibility with other components, it is difficult to stably disperse the additive in silicone oil, and additives that can be mixed are limited.
  • the above-mentioned lubricating oil composition is applicable only to methylphenylpolysiloxane (phenylmethylsilicone oil), and dimethylpolysiloxane (dimethylsilicone oil) cannot stably disperse additives.
  • the bearing grease has a problem that mixing of the rust preventive agent is limited to a semi-solid lubricant such as grease.
  • the silicone grease lubricant composition has a problem that when a fluid lubricating oil is prepared using silica gel having an average particle size of 2 to 15 ⁇ m, the silica gel settles.
  • the object of the present invention is to solve the above-mentioned problems, and exhibit excellent rust resistance by stably dispersing a rust inhibitor in silicone oil having excellent thermal stability, oxidation stability and high viscosity index. It is an object of the present invention to provide a silicone-based lubricating oil composition and a sintered oil-impregnated bearing impregnated with the same.
  • the present invention provides one or two selected from the group of silica gels having a kinematic viscosity of 20 to 1000 mm 2 / s at 25 ° C. of 90.0 to 99.4% by mass and an average primary particle diameter of 30 nm or less. It is composed of at least 0.1 to 5.0% by mass of a mixture of one or more species and 0.5 to 5.0% by mass of one or more mixtures selected from the group of rust inhibitors. And a silicone-based lubricating oil composition.
  • the silicone oil is selected from the group of dimethyl silicone oil, phenylmethyl silicone oil, or modified silicone oil.
  • the silica gel is a hydrophobic silica gel whose surface is modified with an organic group, or a hydrophilic silica gel having a silanol group on the surface.
  • the rust inhibitor is a compound having a sulfonate, a carboxylic acid, an ester, or a heterocyclic ring in the molecule.
  • this silicone-based lubricating oil composition is preferably used for a sintered oil-impregnated bearing.
  • the present invention also relates to a sintered oil-impregnated bearing characterized by impregnating the above-mentioned silicone-based lubricating oil composition.
  • the silica gel used is a chemically stable compound that can be stably dispersed in the silicone oil, and is used in a wide temperature range like the silicone oil. It is possible. Since the silica gel has a very small particle size, it can be stably dispersed in silicone oil. In particular, when a rust inhibitor is mixed in silicone oil in which silica gel is stably dispersed, the rust inhibitor is adsorbed on the silica gel, and the rust inhibitor can be uniformly dispersed in the silicone oil. The silicone-based lubricating oil composition thus obtained becomes a lubricating oil having excellent rust prevention properties.
  • sintered oil-impregnated bearings impregnated with this silicone-based lubricating oil composition can be used without generating rust even under conditions where the bearings are prone to rust. It is preferable to be used as a bearing for such an electric motor.
  • the bearings of the respective examples impregnated with the silicone-based lubricating oil composition according to the present invention are immersed in tap water after 100 hours. Each bearing has no rusting, and the tap water used in the test is It is a photograph which shows the state which is transparent. Shown after 100 hours of rust test in which bearings impregnated with lubricating oil not containing a predetermined amount of rust inhibitor and / or silica gel of Comparative Examples 1 to 3 were immersed in tap water. This is a photograph showing a state in which the tap water used in the test is black and cloudy.
  • the sintered oil-impregnated bearing impregnated with the silicone-based lubricating oil composition according to the present invention includes, for example, a refrigerator / freezer internal fan, a microwave oven fan, an LED cooling fan, an air conditioner, a fan for indoor air conditioning equipment such as a ventilation fan, Various in-vehicle fans (for example, cooling fans for batteries, DC-DC converters, LED headlights, air-conditioning fans such as air-conditioning blowers, seat fans, sensor blowers, etc.), general-purpose boxes for computers, televisions, recording equipment, audio, etc. Fans, cooling unit fans used for notebook computers, electronic throttle (ETC) unit motors, exhaust gas recirculation (EGR) unit motors, units used around high-temperature parts such as engines and exhaust systems It can be used for motors, brushless motors, etc.
  • ETC electronic throttle
  • EGR exhaust gas recirculation
  • the silicone-based lubricating oil composition according to the present invention is composed of silicone oil, silica gel, and a rust inhibitor, and the types and blending ratios thereof are as follows.
  • (A) Silicone oil The silicone oil used in the silicone-based lubricating oil composition according to the present invention is 25 ° C.
  • the general formula for dimethyl silicone oil is (CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n Si (CH 3 ) 3 .
  • the general formula of phenylmethyl silicone oil is (CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n [Si (C 6 H 5 ) 2 O] m Si (CH 3 ) 3
  • the general formula of modified silicone oil is (CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n [Si (CH 3 ) (R) O] m Si (CH 3 ) 3
  • R is a functional group selected from the group of an alkyl group, an amino group, a polyether group, a fluoroalkyl group, and an epoxy group.
  • the symbols m and n in each general formula are integers of 1 or more.
  • silicone oil used in this silicone-based lubricating oil composition is less than 20 mm 2 / s at 25 ° C., the amount of evaporation at a high temperature is unsuitable, and the viscosity is higher than 1000 mm 2 / s. In this case, the addition of a small amount of silica gel is not suitable because the fluidity is lost.
  • silica gel used in the silicone-based lubricating oil composition according to the present invention is intended to stably disperse the rust preventive agent in the silicone oil by adsorbing the rust preventive agent on the surface thereof. It is blended.
  • the silica gel used in the silicone-based lubricating oil composition according to the present invention is one or a mixture of two or more selected from the group of silica gels having an average primary particle size of 30 nm or less. When the average particle diameter of the primary particles of silica gel exceeds 30 nm, the silica gel is noticeably precipitated in the silicone oil, and is not suitable as the silica gel used in the silicone-based lubricating oil composition according to the present invention.
  • the silica gel in the silicone-based lubricating oil composition according to the present invention can be a hydrophilic silica gel having a large number of silanol groups on the surface, or a hydrophobic silica gel having a surface modified with organic groups.
  • the silicone-based lubricating oil composition according to the present invention comprises 0.1 to 5.0% by mass of one or more mixtures selected from the group of silica gels. If the silica gel content exceeds 5.0% by mass, the silicone-based lubricating oil composition becomes greased and loses its fluidity as a lubricating oil. Conversely, the content is 0.1% by mass. If it is less than 1, the effect of silica gel is small, and the dispersion stability of the additive becomes poor.
  • rust preventive agent used in the silicone-based lubricating oil composition according to the present invention, a compound having a sulfonate, a carboxylic acid, an ester and a heterocyclic ring in the molecule is used.
  • the sulfonate include calcium salts such as petroleum sulfonic acid, alkylnaphthalene sulfonic acid, overbased petroleum sulfonic acid, dinonylnaphthalene sulfonic acid, alkylbenzene sulfonic acid, sodium salt, barium salt, magnesium salt, zinc salt, etc. Is mentioned.
  • Examples of the carboxylic acid include C 7 to C 54 fatty acid, dimer acid, trimer acid, benzoic acid and the like.
  • Examples of the ester include sorbitan monooleate, sorbitan tristearate, sorbitan laurate, lanolin fatty acid pentaerythritol ester, lanolin fatty acid isobutyl alcohol ester, tetrapropenyl succinic acid propanediol ester and the like.
  • Examples of the heterocyclic ring include a triazole ring; a benzotriazole ring; an imidazole ring; a thiadiazole ring; and an oxazole ring.
  • the amount of the rust inhibitor added is less than 0.5% by mass, the desired rust preventive property cannot be obtained. Conversely, when the amount of rust inhibitor added is more than 5.0% by mass, the amount of silica gel that maintains the fluidity of silicone oil, that is, silica gel of 5.0% by mass or less, can be dispersed stably. However, it is not suitable for the silicone-based lubricating oil composition according to the present invention. Further, additives other than the rust preventive agent can be dispersed in the composition of the present invention by adsorbing to the silica gel. As an additive, what is used for well-known lubricants, such as antioxidant, extreme pressure agent, and antiwear agent, can be mix
  • the silicone-based lubricating oil composition according to the present invention can be prepared, for example, by the following method.
  • One or two or more types of silica gel and one or more types of rust preventives are added to the silicone oil, and can be prepared by sufficiently kneading with a high-speed rotation type emulsifying stirrer or a high-pressure homogenizer. That is, this silicone-based lubricating oil composition is a group of silica gels having 90.0 to 99.4% by mass of silicone oil having a kinematic viscosity of 20 to 1000 mm 2 / s at 25 ° C. and an average primary particle diameter of 30 nm or less.
  • the mixture can be prepared by mixing in a high-speed rotation type emulsification stirrer or high-pressure homogenizer and kneading sufficiently.
  • the silicone-based lubricating oil composition according to the present invention is preferably used as a lubricating oil for sintered oil-impregnated bearings, for example.
  • the term “sintered oil-impregnated bearing” as used herein refers to a sliding bearing that is used in a self-lubricated state by impregnating a porous metal body produced by pressing and compacting metal powder with a lubricating oil.
  • the base material for sintered oil-impregnated bearings copper alloys such as bronze, brass, and white and iron-based materials are mainly used, but in recent years the use ratio of iron-based materials has increased due to the rising price of copper raw materials. is doing. As a result, the number of cases in which lubricating oil to be impregnated is required to improve rust prevention more than ever.
  • Sintered oil-impregnated bearings are characterized by a very large specific surface area compared to sliding bearings and rolling bearings of the same diameter. Therefore, the lubricating oil impregnated in the sintered oil-impregnated bearing is required to have a strong rust prevention property.
  • the silicone-based lubricating oil composition according to the present invention which is rich in this characteristic, is preferable for use in the sintered oil-impregnated bearing. Is.
  • silica gel 2-1 Hydrophobic silica gel (average primary particle size: 16 nm)
  • rust inhibitor 3-1 Carboxylic acid rust inhibitor (dimer acid, HOOC (CH 2 ) 34 COOH 3-2: Ester rust inhibitor (sorbitan monooleate) 3-3: Sulfonate rust inhibitor (petroleum sulfonate calcium salt) 3-4: Heterocyclic rust inhibitor A (1- [N, N-bis (2-ethylhexyl) aminomethyl] benzotriazole) 3-5: heterocyclic rust inhibitor B [2,5-bis (alkyldithio) -1,3,4-thiadiazole]
  • Example 1 to 16 show The test results for Examples 1 to 16 in Tables 1 to 3, and the test results for Comparative Examples 1 to 5 are shown in Table 4.
  • 1 and 2 show photographs of the petri dish with tap water and bearings after 100 hours of rust test.
  • the silica gel and the rust preventive agent did not separate from the silicone oil and did not settle, and no rust was observed in the rust test. That is, in the photograph of FIG. 1, in the petri dish impregnated with this silicone-based lubricating oil composition and containing a sintered oil-impregnated bearing and tap water, the sintered oil-impregnated bearing does not generate rust (rusting occurs).
  • Comparative Example 1 is a sintered oil-impregnated bearing impregnated with silicone oil alone, the rust prevention power is weak, and in the rust test, the rust generated from the sintered oil-impregnated bearing is treated with tap water put in a petri dish. It became turbid (that is, it turned black in FIG. 2).
  • silica gel was not added to the silicone oil, but only the rust preventive agent was added. Therefore, the rust preventive agent was separated from the silicone oil and settled, and in the rust test, rust was generated on the bearing and generated from the bearing.
  • the rust made the tap water in the petri dish clouded (that is, it turned black in FIG. 2).
  • Comparative Example 3 since the amount of silica gel added to the silicone oil is too small, the rust preventive agent is separated from the silicone oil and settles. In the rust prevention test, rust is generated on the bearing, and the rust generated from the bearing is transferred to the petri dish.
  • the added tap water was turbid (that is, black in FIG. 2). That is, FIG. 2 shows a photograph 100 hours after the rust test of Comparative Examples 1 to 3, but the tap water used in the test was cloudy black due to rusting.
  • the silicone-based lubricating oil composition according to the present invention has a silica gel content of 0.1 to 90.0 to 90.0 to 99.4% by mass. It was found that adding 5.0% by mass and 0.5 to 5.0% by mass of the rust preventive agent is the optimum mixing ratio because the rust preventive property of the lubricating oil is improved.
  • the silicone-based lubricating oil composition according to the present invention is a lubricating oil used for, for example, an automobile auxiliary machine or an electric motor used in appliances, IT, industrial equipment, etc., and the main component is silicone oil.
  • a lubricant obtained by adding at least a rust inhibitor and silica gel to a certain lubricating oil is preferable for use in a sintered oil-impregnated bearing impregnated with the lubricating oil composition.

Abstract

[Problem] The purpose of the present invention is to provide a silicone-based lubricant composition wherein excellent rust prevention can be exhibited by stably dispersing a rust inhibitor in a silicone oil that has excellent thermostability, oxidation stability, and a high index of viscosity, and a sintered oil-containing bearing impregnated therewith. [Solution] This silicone-based lubricant composition comprises 90.0 to 99.4 mass% of silicone oil with a kinematic viscosity of 20 to 1000 mm2/s at 25°C, 0.1 to 5.0 mass% of a mixture of one or more types of silica gel with a primary particle average size of 30 nm or less, and 0.5 to 5.0 mass% of a mixture of one or more types of rust inhibitor.

Description

シリコーン系潤滑油組成物及びそれを含浸させた焼結含油軸受Silicone-based lubricating oil composition and sintered oil-impregnated bearing impregnated with the same
　この発明は，例えば，自動車用補機，或いは家電・ＩＴ・産業用機器の電動機に利用される潤滑油組成物であって，主成分がシリコーン油であるシリコーン系潤滑油組成物及びそれを含浸させた焼結含油軸受に関する。 The present invention relates to a lubricating oil composition for use in, for example, automotive auxiliary machines or electric motors for home appliances, IT, and industrial equipment, and a silicone-based lubricating oil composition whose main component is silicone oil and impregnated with the same The present invention relates to a sintered oil impregnated bearing.
　従来，シリコーン油は，優れた熱安定性，酸化安定性を有しており，高い粘度指数を示すため，様々な産業分野で広く利用されている潤滑油の一つである。 Conventionally, silicone oil is one of lubricating oils widely used in various industrial fields because it has excellent thermal stability and oxidation stability and exhibits a high viscosity index.
　また，シリコーン油とカルボン酸エステルとを混合することにより潤滑性が改善され，且つ摩耗防止剤及び／または酸化防止剤を添加することができる潤滑油組成物が知られている。該潤滑油組成物は，焼結含油軸受用に使用され，低温から高温までの広い温度領域にわたって安定した作動特性をもたらし，かつ潤滑性，及び耐揮発性に優れているものであり，所定のアリール基を含む，４０℃における動粘度が１０～３０００ｍｍ2 ／ｓのポリオルガノシロキサン２０～９０重量％と，カルボン酸エステル８０～１０重量％とからなるものである( 例えば，特許文献１参照) 。 Further, a lubricating oil composition is known in which lubricity is improved by mixing a silicone oil and a carboxylic acid ester, and an antiwear and / or antioxidant can be added. The lubricating oil composition is used for sintered oil-impregnated bearings, provides stable operating characteristics over a wide temperature range from low temperature to high temperature, and is excellent in lubricity and volatilization resistance. Containing 20 to 90% by weight of a polyorganosiloxane containing an aryl group and having a kinematic viscosity of 10 to 3000 mm 2 / s at 40 ° C. and 80 to 10% by weight of a carboxylic acid ester (see, for example, Patent Document 1) .
　また，シリコーン油に増ちょう剤として金属石けんを配合してグリース化し，そこに亜硝酸塩及び有機スルホン酸塩を含まず，かつマグネシウム化合物および気化性防錆剤を必須成分とする防錆剤を添加した軸受用グリースが知られている（例えば，特許文献２参照）。 In addition, silicone oil is blended with metallic soap as a thickener to make a grease, which contains a rust inhibitor that does not contain nitrite and organic sulfonate, and contains magnesium compounds and vaporizable rust preventives as essential ingredients. A known bearing grease is known (for example, see Patent Document 2).
　また，シリコーン油と平均粒子径が２～１５μｍのシリカゲル，及び固体潤滑剤を混合したシリコーングリース系潤滑剤組成物が知られている。該シリコーングリース系潤滑剤組成物は，基油であるシリコーン油に無機増ちょう剤と固体潤滑剤を添加したものであって，シリコーン油の配合量が５０～９９．８重量％，無機増ちょう剤の配合量が０．１～３０重量％，固体潤滑剤の配合量が０．１～４９．９重量％であり，シリコーン油がジメチルシリコーン油及びメチルフェニルシリコーン油から選ばれ，２５℃の動粘度が５０～１，０００，０００ｍｍ2 ／秒であって，無機増ちょう剤が細孔を有する疎水性微粉末シリカゲルである( 例えば，特許文献３参照）。 Also known is a silicone grease lubricant composition in which silicone oil, silica gel having an average particle diameter of 2 to 15 μm, and a solid lubricant are mixed. The silicone grease-based lubricant composition is obtained by adding an inorganic thickener and a solid lubricant to a silicone oil as a base oil, and the amount of the silicone oil blended is 50 to 99.8% by weight. The blending amount of the agent is 0.1 to 30% by weight, the blending amount of the solid lubricant is 0.1 to 49.9% by weight, and the silicone oil is selected from dimethylsilicone oil and methylphenylsilicone oil. Hydrophobic fine powder silica gel having a kinematic viscosity of 50 to 1,000,000 mm 2 / sec and an inorganic thickener having pores (see, for example, Patent Document 3).
特開２００３－２６１８９２号公報JP 2003-261892 A 特開２００４－１７６０７５号公報JP 2004-176075 A 特開２０１０－２７５３８４号公報JP 2010-275384 A
　しかしながら，シリコーン油は，潤滑性や防錆性を有することに劣っており，これらの欠点を，添加剤等を補うことで改善されることが望まれているが，シリコーン油が添加剤等の他の成分との相溶性が悪いため，シリコーン油中に添加剤を安定して分散させるのが難しく，混合できる添加剤が限定されていた。 However, silicone oil is inferior in having lubricity and rust preventive properties, and it is desired that these defects be improved by supplementing additives. Due to poor compatibility with other components, it is difficult to stably disperse the additive in silicone oil, and additives that can be mixed are limited.
　また，上記潤滑油組成物は，適用できるシリコーン油がメチルフェニルポリシロキサン( フェニルメチルシリコーン油) に限定され，ジメチルポリシロキサン( ジメチルシリコーン油) では，添加剤を安定に分散することはできていないという問題点を有している。また，上記軸受用グリースは，防錆剤の混合が，グリースのような半固体状潤滑剤に限定されるという問題点を有している。更に，上記シリコーングリース系潤滑剤組成物は，平均粒子径２～１５μｍのシリカゲルを用いて流動性のある潤滑油を調製した場合に，シリカゲルが沈降してしまうという問題が有った。 In addition, the above-mentioned lubricating oil composition is applicable only to methylphenylpolysiloxane (phenylmethylsilicone oil), and dimethylpolysiloxane (dimethylsilicone oil) cannot stably disperse additives. Has the problem. Further, the bearing grease has a problem that mixing of the rust preventive agent is limited to a semi-solid lubricant such as grease. Furthermore, the silicone grease lubricant composition has a problem that when a fluid lubricating oil is prepared using silica gel having an average particle size of 2 to 15 μm, the silica gel settles.
　この発明の目的は，上記課題を解決するものであり，優れた熱安定性・酸化安定性，高い粘度指数を有するシリコーン油に防錆剤を安定に分散させ，優れた防錆性を発揮することができるシリコーン系潤滑油組成物及びそれを含浸させた焼結含油軸受を提供することである。 The object of the present invention is to solve the above-mentioned problems, and exhibit excellent rust resistance by stably dispersing a rust inhibitor in silicone oil having excellent thermal stability, oxidation stability and high viscosity index. It is an object of the present invention to provide a silicone-based lubricating oil composition and a sintered oil-impregnated bearing impregnated with the same.
　この発明は，２５℃で２０～１０００ｍｍ2 ／ｓの動粘度を有するシリコーン油９０．０～９９．４質量％，一次粒子平均径が３０ｎｍ以下であるシリカゲルの群から選択される１種または２種以上の混合物０．１～５．０質量％，及び防錆剤の群から選択される１種または２種以上の混合物０．５～５．０質量％から少なくとも構成されていることを特徴とするシリコーン系潤滑油組成物に関する。 The present invention provides one or two selected from the group of silica gels having a kinematic viscosity of 20 to 1000 mm 2 / s at 25 ° C. of 90.0 to 99.4% by mass and an average primary particle diameter of 30 nm or less. It is composed of at least 0.1 to 5.0% by mass of a mixture of one or more species and 0.5 to 5.0% by mass of one or more mixtures selected from the group of rust inhibitors. And a silicone-based lubricating oil composition.
　また，このシリコーン系潤滑油組成物において，前記シリコーン油は，ジメチルシリコーン油，フェニルメチルシリコーン油，または変性シリコーン油の群から選択されるものである。 In the silicone-based lubricating oil composition, the silicone oil is selected from the group of dimethyl silicone oil, phenylmethyl silicone oil, or modified silicone oil.
　また，このシリコーン系潤滑油組成物において，前記シリカゲルは，表面を有機基で修飾した疎水性シリカゲル，または表面にシラノール基を持った親水性シリカゲルである。　 In the silicone-based lubricating oil composition, the silica gel is a hydrophobic silica gel whose surface is modified with an organic group, or a hydrophilic silica gel having a silanol group on the surface. *
　また，このシリコーン系潤滑油組成物において，前記防錆剤は，スルホン酸塩，カルボン酸，エステル，または複素環を分子内に持つ化合物である。 In the silicone-based lubricating oil composition, the rust inhibitor is a compound having a sulfonate, a carboxylic acid, an ester, or a heterocyclic ring in the molecule.
　また，このシリコーン系潤滑油組成物は，焼結含油軸受に使用して好ましい。 Further, this silicone-based lubricating oil composition is preferably used for a sintered oil-impregnated bearing.
　また，この発明は，上記のシリコーン系潤滑油組成物を含浸させたことを特徴とする焼結含油軸受に関する。 The present invention also relates to a sintered oil-impregnated bearing characterized by impregnating the above-mentioned silicone-based lubricating oil composition.
　この発明によるシリコーン系潤滑油組成物では，用いられるシリカゲルは，シリコーン油中に安定して分散することができ，化学的に安定な化合物であり，シリコーン油と同様に，広温度範囲で使用することが可能である。上記シリカゲルは，粒径が非常に小さいため，シリコーン油中で安定に分散することができる。特に，シリカゲルを安定して分散させたシリコーン油中に，防錆剤を混合すると，防錆剤はシリカゲルに吸着し，シリコーン油中に防錆剤を均一に分散させることができる。このようにして得られたシリコーン系潤滑油組成物は，優れた防錆性を有する潤滑油となる。また，このシリコーン系潤滑油組成物を含浸させた焼結含油軸受は，軸受が錆び易い条件でも錆を発生させることなく，使用することができ，自動車用補機，家電・ＩＴ・産業用機器の電動機等の軸受として使用して好ましいものとなる。 In the silicone-based lubricating oil composition according to the present invention, the silica gel used is a chemically stable compound that can be stably dispersed in the silicone oil, and is used in a wide temperature range like the silicone oil. It is possible. Since the silica gel has a very small particle size, it can be stably dispersed in silicone oil. In particular, when a rust inhibitor is mixed in silicone oil in which silica gel is stably dispersed, the rust inhibitor is adsorbed on the silica gel, and the rust inhibitor can be uniformly dispersed in the silicone oil. The silicone-based lubricating oil composition thus obtained becomes a lubricating oil having excellent rust prevention properties. In addition, sintered oil-impregnated bearings impregnated with this silicone-based lubricating oil composition can be used without generating rust even under conditions where the bearings are prone to rust. It is preferable to be used as a bearing for such an electric motor.
この発明によるシリコーン系潤滑油組成物を含浸した各実施例の軸受を水道水に浸漬して行った錆試験１００時間後を示し，各軸受には発錆はなく，試験に用いた水道水が透明である状態を示す写真である。The bearings of the respective examples impregnated with the silicone-based lubricating oil composition according to the present invention are immersed in tap water after 100 hours. Each bearing has no rusting, and the tap water used in the test is It is a photograph which shows the state which is transparent. 比較例１～３の防錆剤及び／またはシリカゲルが所定の量含有されていない潤滑油を含浸させた軸受を水道水に浸漬して行った錆試験１００時間後を示し，各軸受の発錆により，試験に用いた水道水が黒く濁っている状態を示す写真である。Shown after 100 hours of rust test in which bearings impregnated with lubricating oil not containing a predetermined amount of rust inhibitor and / or silica gel of Comparative Examples 1 to 3 were immersed in tap water. This is a photograph showing a state in which the tap water used in the test is black and cloudy.
　以下，この発明によるシリコーン系潤滑油組成物及びそれを含浸した焼結含油軸受について，詳細に説明する。
　この発明によるシリコーン系潤滑油組成物を含浸させた焼結含油軸受は，例えば，冷蔵庫・冷凍庫用庫内ファン，オーブンレンジ庫内ファン，ＬＥＤ冷却ファン，エアコン，換気扇等の室内空調機器用ファン，車載用各種ファン（例えば，バッテリ・ＤＣ－ＤＣコンバータ・ＬＥＤヘッドライトの冷却用ファン，エアコンブロワ等の空調用ファン，シートファン，センサーブロワ等) ，コンピュータ・テレビ・録画機器・オーディオ等の汎用ボックスファン，ノート型パソコン等に使用される冷却ユニット用ファン，電子スロットル（ＥＴＣ）ユニット用モータ，排気ガス再循環装置（ＥＧＲ）ユニット用モータ，エンジン・排気系といった高温部周辺で使用されるユニット用モータ，ブラシレスモータ等に使用することができる。 Hereinafter, the silicone-based lubricating oil composition according to the present invention and the sintered oil-impregnated bearing impregnated therewith will be described in detail.
The sintered oil-impregnated bearing impregnated with the silicone-based lubricating oil composition according to the present invention includes, for example, a refrigerator / freezer internal fan, a microwave oven fan, an LED cooling fan, an air conditioner, a fan for indoor air conditioning equipment such as a ventilation fan, Various in-vehicle fans (for example, cooling fans for batteries, DC-DC converters, LED headlights, air-conditioning fans such as air-conditioning blowers, seat fans, sensor blowers, etc.), general-purpose boxes for computers, televisions, recording equipment, audio, etc. Fans, cooling unit fans used for notebook computers, electronic throttle (ETC) unit motors, exhaust gas recirculation (EGR) unit motors, units used around high-temperature parts such as engines and exhaust systems It can be used for motors, brushless motors, etc.
　まず，この発明によるシリコーン系潤滑油組成物について，その構成成分はシリコーン油，シリカゲル，及び防錆剤から成り，それらの種類及び配合割合は次のとおりである。　（ａ）シリコーン油について
　この発明によるシリコーン系潤滑油組成物に用いられるシリコーン油は，２５℃で，
２０～１０００ｍｍ2 ／ｓの動粘度を有するジメチルシリコーン油，フェニルメチルシリコーン油，及び変性シリコーン油の群から選択される１種または２種以上である（少なくとも１種である。）。
　ジメチルシリコーン油の一般式は，
（ＣＨ3 ）3 SiO 〔Si（ＣＨ3 ）2 Ｏ〕n Si（ＣＨ3 ）3 で表される化合物である。
　フェニルメチルシリコーン油の一般式は，
（ＣＨ3 ）3 SiO 〔Si（ＣＨ3 ）2 Ｏ〕n 〔Si（Ｃ6 Ｈ5 ）2 Ｏ〕m Si（ＣＨ3 ）3 で表される化合物である。
　また，変性シリコーン油の一般式は，
（ＣＨ3 ）3 SiO 〔Si（ＣＨ3 ）2 Ｏ〕n 〔Si（ＣＨ3 ）（Ｒ）Ｏ〕m Si（ＣＨ3 ）3 でで表される化合物である。
  但し，Ｒはアルキル基，アミノ基，ポリエーテル基，フロロアルキル基，エポキシ基の群から選択される官能基である。各一般式における符号ｍ，ｎは，1 以上の整数である。　このシリコーン系潤滑油組成物に用いられるシリコーン油は，２５℃で２０ｍｍ2 ／ｓ未満の場合は，高温時での蒸発量が大きくなって不適であり，また，１０００ｍｍ2 ／ｓより粘度が高い場合は，シリカゲルの少量添加で流動性を失うため不適である。 First, the silicone-based lubricating oil composition according to the present invention is composed of silicone oil, silica gel, and a rust inhibitor, and the types and blending ratios thereof are as follows. (A) Silicone oil The silicone oil used in the silicone-based lubricating oil composition according to the present invention is 25 ° C.
One or more selected from the group of dimethyl silicone oil, phenylmethyl silicone oil, and modified silicone oil having a kinematic viscosity of 20 to 1000 mm 2 / s (at least one).
The general formula for dimethyl silicone oil is
(CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n Si (CH 3 ) 3 .
The general formula of phenylmethyl silicone oil is
(CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n [Si (C 6 H 5 ) 2 O] m Si (CH 3 ) 3
The general formula of modified silicone oil is
(CH 3 ) 3 SiO [Si (CH 3 ) 2 O] n [Si (CH 3 ) (R) O] m Si (CH 3 ) 3
However, R is a functional group selected from the group of an alkyl group, an amino group, a polyether group, a fluoroalkyl group, and an epoxy group. The symbols m and n in each general formula are integers of 1 or more. When the silicone oil used in this silicone-based lubricating oil composition is less than 20 mm 2 / s at 25 ° C., the amount of evaporation at a high temperature is unsuitable, and the viscosity is higher than 1000 mm 2 / s. In this case, the addition of a small amount of silica gel is not suitable because the fluidity is lost.
　（ｂ）シリカゲルについて
　この発明によるシリコーン系潤滑油組成物に用いられるシリカゲルは，その表面に防錆剤を吸着させることによって，防錆剤をシリコーン油中に安定して分散させることを目的とし，配合されている。
　この発明によるシリコーン系潤滑油組成物に用いられるシリカゲルは，一次粒子の平均径が３０ｎｍ以下であるシリカゲルの群から選択される１種または２種以上の混合物である。シリカゲルの一次粒子の平均径が３０ｎｍを超える場合には，シリコーン油中でシリカゲルの沈降が顕著にみられ，この発明によるシリコーン系潤滑油組成物に用いられるシリカゲルとしては，適さないものである。
　また，この発明によるシリコーン系潤滑油組成物におけるシリカゲルは，表面に多数のシラノール基を持った親水性シリカゲル，または表面を有機基で修飾した疎水性シリカゲルを用いることができる。
　この発明によるシリコーン系潤滑油組成物は，上記シリカゲルの群から選択される１種または２種以上の混合物０．１～５．０質量％から成るものである。
　シリカゲルの含有量が５．０質量％を超える場合には，このシリコーン系潤滑油組成物はグリース化し，潤滑油としての流動性を失うことになり，逆に，含有量が０．１質量％未満となると，シリカゲルの効果は小さく，添加剤の分散安定性が悪くなる。 (B) Silica gel The silica gel used in the silicone-based lubricating oil composition according to the present invention is intended to stably disperse the rust preventive agent in the silicone oil by adsorbing the rust preventive agent on the surface thereof. It is blended.
The silica gel used in the silicone-based lubricating oil composition according to the present invention is one or a mixture of two or more selected from the group of silica gels having an average primary particle size of 30 nm or less. When the average particle diameter of the primary particles of silica gel exceeds 30 nm, the silica gel is noticeably precipitated in the silicone oil, and is not suitable as the silica gel used in the silicone-based lubricating oil composition according to the present invention.
The silica gel in the silicone-based lubricating oil composition according to the present invention can be a hydrophilic silica gel having a large number of silanol groups on the surface, or a hydrophobic silica gel having a surface modified with organic groups.
The silicone-based lubricating oil composition according to the present invention comprises 0.1 to 5.0% by mass of one or more mixtures selected from the group of silica gels.
If the silica gel content exceeds 5.0% by mass, the silicone-based lubricating oil composition becomes greased and loses its fluidity as a lubricating oil. Conversely, the content is 0.1% by mass. If it is less than 1, the effect of silica gel is small, and the dispersion stability of the additive becomes poor.
　（ｃ）添加剤としての防錆剤について
　この発明によるシリコーン系潤滑油組成物に用いられる防錆剤は，スルホン酸塩，カルボン酸，エステル，複素環を分子内に持つ化合物が用いられる。
　スルホン酸塩としては，例えば，石油スルホン酸，アルキルナフタレンスルホン酸，過塩基性石油スルホン酸，ジノニルナフタレンスルホン酸，アルキルベンゼンスルホン酸等のカルシウム塩，ナトリウム塩，バリウム塩，マグネシウム塩，亜鉛塩等が挙げられる。　カルボン酸としては，例えば，Ｃ7 ～Ｃ54の脂肪酸，ダイマー酸，トリマー酸，安息香酸等が挙げられる。
　エステルとしては，例えば，ソルビタンモノオレート，ソルビタントリステアレート，ソルビタンラウレート，ラノリン脂肪酸ペンタエリスリトールエステル，ラノリン脂肪酸イソブチルアルコールエステル，テトラプロペニルコハク酸プロパンジオールエステル等が挙げられる。
　複素環としては，例えば，トリアゾール環；　ベンゾトリアゾール環；　イミダゾール環；　チアジアゾール環；　オキサゾール環等が挙げられる。
　具体的には，Ｎ，Ｎ－ビス（２－エチルヘキシル）－〔（１，２，４－トリアゾール－１－イル) メチル〕アミン；　１，２，３－ベンゾトリアゾール；　１－〔Ｎ，Ｎ－ビス（２－エチルヘキシル）アミノメチル〕ベンゾトリアゾール；　２－（アルキルジチオ) ベンゾイミダゾール；　２，５－ビス（アルキルジチオ）－１，３，４－チアジアゾール；　２，５－ジメルカプト－１，３，４－チアジアゾール；　２－ヘプタデセニル－４，４（５Ｈ）－オキサゾールジメタノール等を挙げることができる。
　防錆剤の添加量が０．５質量％未満の場合には，所望の防錆性を得る事はできない。
　逆に防錆剤の添加量が５．０質量％より多い場合には，シリコーン油の流動性を保つ程度のシリカゲルの量，即ち，５．０質量％以下のシリカゲルでは，安定に分散させるのが難しいため，本発明によるシリコーン系潤滑油組成物には適さないものである。
　また，防錆剤以外の添加剤も，シリカゲルに吸着することにより，本発明の組成物中に分散することが可能である。添加剤としては，酸化防止剤，極圧剤，耐摩耗剤など公知の潤滑剤に使用されているものを必要に応じて配合することができる。 (C) About the rust preventive agent as an additive As the rust preventive agent used in the silicone-based lubricating oil composition according to the present invention, a compound having a sulfonate, a carboxylic acid, an ester and a heterocyclic ring in the molecule is used.
Examples of the sulfonate include calcium salts such as petroleum sulfonic acid, alkylnaphthalene sulfonic acid, overbased petroleum sulfonic acid, dinonylnaphthalene sulfonic acid, alkylbenzene sulfonic acid, sodium salt, barium salt, magnesium salt, zinc salt, etc. Is mentioned. Examples of the carboxylic acid include C 7 to C 54 fatty acid, dimer acid, trimer acid, benzoic acid and the like.
Examples of the ester include sorbitan monooleate, sorbitan tristearate, sorbitan laurate, lanolin fatty acid pentaerythritol ester, lanolin fatty acid isobutyl alcohol ester, tetrapropenyl succinic acid propanediol ester and the like.
Examples of the heterocyclic ring include a triazole ring; a benzotriazole ring; an imidazole ring; a thiadiazole ring; and an oxazole ring.
Specifically, N, N-bis (2-ethylhexyl)-[(1,2,4-triazol-1-yl) methyl] amine; 1,2,3-benzotriazole; 1- [N, N- Bis (2-ethylhexyl) aminomethyl] benzotriazole; 2- (alkyldithio) benzimidazole; 2,5-bis (alkyldithio) -1,3,4-thiadiazole; 2,5-dimercapto-1,3,4 -Thiadiazole; 2-heptadecenyl-4,4 (5H) -oxazole dimethanol and the like.
When the amount of the rust inhibitor added is less than 0.5% by mass, the desired rust preventive property cannot be obtained.
Conversely, when the amount of rust inhibitor added is more than 5.0% by mass, the amount of silica gel that maintains the fluidity of silicone oil, that is, silica gel of 5.0% by mass or less, can be dispersed stably. However, it is not suitable for the silicone-based lubricating oil composition according to the present invention.
Further, additives other than the rust preventive agent can be dispersed in the composition of the present invention by adsorbing to the silica gel. As an additive, what is used for well-known lubricants, such as antioxidant, extreme pressure agent, and antiwear agent, can be mix | blended as needed.
　この発明によるシリコーン系潤滑油組成物は，例えば，次のような方法で調製することができる。シリコーン油に，１種もしくは２種以上のシリカゲル，及び１種もしくは２種以上の防錆剤を投入し，高速回転型乳化撹拌機もしくは高圧ホモジナイザーで十分混錬することによって調製することができる。即ち，このシリコーン系潤滑油組成物は，２５℃で２０～１０００ｍｍ2 ／ｓの動粘度を有するシリコーン油９０．０～９９．４質量％と，一次粒子平均径が３０ｎｍ以下であるシリカゲルの群から選択される１種または２種以上の混合物０．１～５．０質量％，及び防錆剤の群から選択される１種または２種以上の混合物０．５～５．０質量％を，高速回転型乳化撹拌機もしくは高圧ホモジナイザーに投入して十分混錬することによって調製することができる。 The silicone-based lubricating oil composition according to the present invention can be prepared, for example, by the following method. One or two or more types of silica gel and one or more types of rust preventives are added to the silicone oil, and can be prepared by sufficiently kneading with a high-speed rotation type emulsifying stirrer or a high-pressure homogenizer. That is, this silicone-based lubricating oil composition is a group of silica gels having 90.0 to 99.4% by mass of silicone oil having a kinematic viscosity of 20 to 1000 mm 2 / s at 25 ° C. and an average primary particle diameter of 30 nm or less. 0.1 to 5.0% by mass of one or more mixtures selected from the group consisting of 0.5 to 5.0% by mass of one or more mixtures selected from the group of rust inhibitors , The mixture can be prepared by mixing in a high-speed rotation type emulsification stirrer or high-pressure homogenizer and kneading sufficiently.
　次に，この発明によるシリコーン系潤滑油組成物を使用した軸受について詳細に説明する。この発明によるシリコーン系潤滑油組成物は，例えば，焼結含油軸受用の潤滑油として使用して好ましいものである。
　ここでいう焼結含油軸受とは，金属粉末を押し固め，加熱することによって製造された多孔質の金属体に潤滑油を含浸させ，自己給油の状態で使用する滑り軸受である。焼結含油軸受の基材としては，主に，青銅，黄銅，洋白といった銅合金や鉄系材料が使用されるが，近年は銅原料価格の高騰の影響により鉄系材料の使用比率が上昇している。これに伴い，含浸される潤滑油に対しては，これまで以上に防錆性の向上を要求される場合が増加している。
　また，焼結含油軸受は，同等径の滑り軸受，転がり軸受に比べ，比表面積が非常に大きいという特徴を有している。そのため，焼結含油軸受に含浸される潤滑油には，強い防錆性が求められるが，この特性に富んでいるこの発明によるシリコーン系潤滑油組成物は，焼結含油軸受に使用して好ましいものである。 Next, the bearing using the silicone-based lubricating oil composition according to the present invention will be described in detail. The silicone-based lubricating oil composition according to the present invention is preferably used as a lubricating oil for sintered oil-impregnated bearings, for example.
The term “sintered oil-impregnated bearing” as used herein refers to a sliding bearing that is used in a self-lubricated state by impregnating a porous metal body produced by pressing and compacting metal powder with a lubricating oil. As the base material for sintered oil-impregnated bearings, copper alloys such as bronze, brass, and white and iron-based materials are mainly used, but in recent years the use ratio of iron-based materials has increased due to the rising price of copper raw materials. is doing. As a result, the number of cases in which lubricating oil to be impregnated is required to improve rust prevention more than ever.
Sintered oil-impregnated bearings are characterized by a very large specific surface area compared to sliding bearings and rolling bearings of the same diameter. Therefore, the lubricating oil impregnated in the sintered oil-impregnated bearing is required to have a strong rust prevention property. However, the silicone-based lubricating oil composition according to the present invention, which is rich in this characteristic, is preferable for use in the sintered oil-impregnated bearing. Is.
　以下，この発明によるシリコーン系潤滑油組成物について，各種の試料，即ち，実施例１～実施例１６を作製して，また，本発明品との比較のため，比較例１～比較例５を作製して，本発明品が比較品に比べて防錆性を有しているという効果を説明する。
　実施例１～実施例１６，比較例１～比較例５における試料は，下記において，１－１～１－７で示すシリコーン油，２－１～２－５で示すシリカゲル，及び３－１～３－５で示す防錆剤を表１～表３に示す割合で配合した混合物を，高速回転型乳化撹拌機によって調製したものである。 Hereinafter, various samples of the silicone-based lubricating oil composition according to the present invention, that is, Examples 1 to 16 were prepared, and for comparison with the products of the present invention, Comparative Examples 1 to 5 were prepared. The effect that the product of the present invention has rust prevention compared to the comparative product will be described.
Samples in Examples 1 to 16 and Comparative Examples 1 to 5 are silicone oils indicated by 1-1 to 1-7, silica gels indicated by 2-1 to 2-5, and 3-1 to A mixture in which the rust preventive agent shown in 3-5 was blended in the proportions shown in Tables 1 to 3 was prepared by a high-speed rotation type emulsifying stirrer.
　シリコーン油について
　　１－１：信越化学工業製ＫＦ－９６－２０ＣＳ
　　　　　〔ジメチルシリコーン油，動粘度：２５℃で２０ｍｍ2 ／ｓ〕
　　１－２：信越化学工業製ＫＦ－９６－１００ＣＳ
　　　　　〔ジメチルシリコーン油，動粘度：２５℃で１００ｍｍ2 ／ｓ〕
　　１－３：信越化学工業製ＫＦ－９６－１０００ＣＳ
　　　　　〔ジメチルシリコーン油，動粘度：２５℃で１０００ｍｍ2 ／ｓ〕
　　１－４：信越化学工業製ＫＦ－５０－３００ＣＳ
　　　　　〔フェニルメチルシリコーン油，動粘度：２５℃で３００ｍｍ2 ／ｓ〕
　　１－５：信越化学工業製ＫＦ－４００３
　　　　　〔アルキル変性シリコーン油，動粘度：２５℃で４０ｍｍ2 ／ｓ〕
　　１－６：信越化学工業製ＦＬ－１００－１００ＣＳ
　　　　　〔フロロアルキル変性シリコーン油，動粘度：２５℃で１００ｍｍ2 ／ｓ〕
　　１－７：信越化学工業製ＫＦ－６１５Ａ
　　　　　〔ポリエーテル変性シリコーン油，動粘度：２５℃で９２０ｍｍ2 ／ｓ〕 About Silicone Oil 1-1: KF-96-20CS manufactured by Shin-Etsu Chemical Co., Ltd.
[Dimethyl silicone oil, kinematic viscosity: 20 mm 2 / s at 25 ° C]
1-2: Shin-Etsu Chemical KF-96-100CS
[Dimethyl silicone oil, kinematic viscosity: 100 mm 2 / s at 25 ° C]
1-3: Shin-Etsu Chemical KF-96-1000CS
[Dimethyl silicone oil, kinematic viscosity: 1000 mm 2 / s at 25 ° C]
1-4: Shin-Etsu Chemical KF-50-300CS
[Phenylmethylsilicone oil, kinematic viscosity: 300 mm 2 / s at 25 ° C]
1-5: Shin-Etsu Chemical KF-4003
[Alkyl-modified silicone oil, kinematic viscosity: 40 mm 2 / s at 25 ° C.]
1-6: Shin-Etsu Chemical FL-100-100CS
[Fluoroalkyl-modified silicone oil, kinematic viscosity: 100 mm 2 / s at 25 ° C.]
1-7: Shin-Etsu Chemical KF-615A
[Polyether-modified silicone oil, kinematic viscosity: 920 mm 2 / s at 25 ° C.]
　シリカゲルについて
　　２－１：疎水性シリカゲル（一次粒子平均径：１６ｎｍ）
　　２－２：疎水性シリカゲル（一次粒子平均径：１２ｎｍ）
　　２－３：親水性シリカゲル（一次粒子平均径：３０ｎｍ）
　　２－４：親水性シリカゲル（一次粒子平均径：１２ｎｍ）
　　２－５：親水性シリカゲル（一次粒子平均径：４０ｎｍ） About silica gel 2-1: Hydrophobic silica gel (average primary particle size: 16 nm)
2-2: Hydrophobic silica gel (average primary particle size: 12 nm)
2-3: Hydrophilic silica gel (average primary particle size: 30 nm)
2-4: Hydrophilic silica gel (average primary particle size: 12 nm)
2-5: Hydrophilic silica gel (average primary particle size: 40 nm)
　防錆剤について
　　３－１：カルボン酸系防錆剤（ダイマー酸，ＨＯＯＣ（ＣＨ2 ）34ＣＯＯＨ
　　３－２：エステル系防錆剤（ソルビタンモノオレート）
　　３－３：スルホン酸塩系防錆剤（石油スルホン酸カルシウム塩）
　　３－４：複素環系防錆剤Ａ
　　（１－〔Ｎ，Ｎ－ビス（２－エチルヘキシル) アミノメチル〕ベンゾトリアゾール）　　３－５：複素環系防錆剤Ｂ
　　〔２，５－ビス（アルキルジチオ）－１，３，４－チアジアゾール〕 About rust inhibitor 3-1: Carboxylic acid rust inhibitor (dimer acid, HOOC (CH 2 ) 34 COOH
3-2: Ester rust inhibitor (sorbitan monooleate)
3-3: Sulfonate rust inhibitor (petroleum sulfonate calcium salt)
3-4: Heterocyclic rust inhibitor A
(1- [N, N-bis (2-ethylhexyl) aminomethyl] benzotriazole) 3-5: heterocyclic rust inhibitor B
[2,5-bis (alkyldithio) -1,3,4-thiadiazole]
　これら試料を下記試験法によって評価した。
　〔外観〕
　　　調製１週間静置後に目視でシリカゲルや防錆剤の分離・沈降を確認した。
　〔錆試験〕
　　　水道水４ｍｌを入れたφ３０シャーレに，試料を含浸させた鉄系焼結含油軸受
（外径７ｍｍ，内径３ｍｍ，高さ１１．５ｍｍ）を２個静置し，常温で常湿で１００時間放置した。１００時間後に，軸受からの発錆を確認した。 These samples were evaluated by the following test methods.
〔appearance〕
After the preparation was allowed to stand for 1 week, separation / sedimentation of the silica gel and the rust inhibitor was visually confirmed.
[Rust test]
Place two iron-based sintered oil-impregnated bearings (outer diameter 7 mm, inner diameter 3 mm, height 11.5 mm) impregnated with a sample in a φ30 petri dish containing 4 ml of tap water, and let stand at room temperature and humidity for 100 hours. did. After 100 hours, rusting from the bearing was confirmed.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　実施例１～実施例１６についての試験結果を表１～表３に，及び比較例１～比較例５についての試験結果を表４に併記した。また，図１，及び図２に錆試験１００時間後の水道水と軸受を入れたシャーレの写真を示した。
　この発明によるシリコーン系潤滑油組成物に係る実施例１～実施例１６の各試料でシリカゲル及び防錆剤がシリコーン油から分離せず沈降もなく，錆試験において錆は観察されなかった。即ち，図１の写真では，このシリコーン系潤滑油組成物を含浸させて焼結含油軸受と水道水を入れたシャーレには，上記焼結含油軸受には錆が発生せずに（発錆がなく），シャーレに入れた水道水は錆が入り込むことなく透明のままであった。
　これに対して，比較例１は，シリコーン油単体を含浸させた焼結含油軸受であるため，防錆力が弱く，錆試験では焼結含油軸受から発生した錆がシャーレに入れた水道水を濁らせた（即ち，図２では黒くなっている。）。比較例２は，シリコーン油にシリカゲルを添加せず，防錆剤のみを添加していたため，シリコーン油から防錆剤が分離し，沈降し，錆試験では軸受に錆が発生し，軸受から発生した錆がシャーレに入れた水道水を濁らせた（即ち，図２では黒くなっている。）。比較例３では，シリコーン油に添加するシリカゲル量が少な過ぎるため，シリコーン油から防錆剤が分離し，沈降し，防錆試験では，軸受に錆が発生し，軸受から発生した錆がシャーレに入れた水道水を濁らせた（即ち，図２では黒くなっている。）。即ち，図２には，比較例１～３の錆試験１００時間後の写真を示したが，発錆により試験に用いた水道水が黒く濁っていた。
　図示していないが，比較例４では，シリコーン油に対してシリカゲルの添加量が多過ぎるため，潤滑油がグリース化し，潤滑油としての流動性を失った状態になった。また，比較例５では，シリカゲルの粒径が大き過ぎるため，シリカゲルのシリコーン油中への分散安定性が悪く，シリカゲル及び防錆剤が沈降し，軸受に含浸させることができなかった。　上記の実施例１～１６及び比較例１～５についての試験結果から，この発明によるシリコーン系潤滑油組成物は，シリコーン油９０．０～９９．４質量％に対して，シリカゲル０．１～５．０質量％，及び防錆剤０．５～５．０質量％を配合させることが，潤滑油の防錆性を向上させることから最適な配合割合であることが分かった。 The test results for Examples 1 to 16 are shown in Tables 1 to 3, and the test results for Comparative Examples 1 to 5 are shown in Table 4. 1 and 2 show photographs of the petri dish with tap water and bearings after 100 hours of rust test.
In each sample of Examples 1 to 16 relating to the silicone-based lubricating oil composition according to the present invention, the silica gel and the rust preventive agent did not separate from the silicone oil and did not settle, and no rust was observed in the rust test. That is, in the photograph of FIG. 1, in the petri dish impregnated with this silicone-based lubricating oil composition and containing a sintered oil-impregnated bearing and tap water, the sintered oil-impregnated bearing does not generate rust (rusting occurs). No), the tap water in the petri dish remained transparent with no rust.
In contrast, since Comparative Example 1 is a sintered oil-impregnated bearing impregnated with silicone oil alone, the rust prevention power is weak, and in the rust test, the rust generated from the sintered oil-impregnated bearing is treated with tap water put in a petri dish. It became turbid (that is, it turned black in FIG. 2). In Comparative Example 2, silica gel was not added to the silicone oil, but only the rust preventive agent was added. Therefore, the rust preventive agent was separated from the silicone oil and settled, and in the rust test, rust was generated on the bearing and generated from the bearing. The rust made the tap water in the petri dish clouded (that is, it turned black in FIG. 2). In Comparative Example 3, since the amount of silica gel added to the silicone oil is too small, the rust preventive agent is separated from the silicone oil and settles. In the rust prevention test, rust is generated on the bearing, and the rust generated from the bearing is transferred to the petri dish. The added tap water was turbid (that is, black in FIG. 2). That is, FIG. 2 shows a photograph 100 hours after the rust test of Comparative Examples 1 to 3, but the tap water used in the test was cloudy black due to rusting.
Although not shown, in Comparative Example 4, since the amount of silica gel added was too large with respect to the silicone oil, the lubricating oil was greased and lost its fluidity as a lubricating oil. In Comparative Example 5, since the silica gel particle size was too large, the dispersion stability of the silica gel in the silicone oil was poor, and the silica gel and the rust preventive agent settled and could not be impregnated in the bearing. From the test results for Examples 1 to 16 and Comparative Examples 1 to 5, the silicone-based lubricating oil composition according to the present invention has a silica gel content of 0.1 to 90.0 to 90.0 to 99.4% by mass. It was found that adding 5.0% by mass and 0.5 to 5.0% by mass of the rust preventive agent is the optimum mixing ratio because the rust preventive property of the lubricating oil is improved.
　この発明によるシリコーン系潤滑油組成物は，例えば，自動車用補機，または家電，ＩＴ，産業用機器等の機器に使用される電動機に利用される潤滑油であって，主成分がシリコーン油である潤滑油に，少なくとも防錆剤及びシリカゲルを添加したものであり，該潤滑油組成物を含浸させた焼結含油軸受に利用されて好ましいものである。 The silicone-based lubricating oil composition according to the present invention is a lubricating oil used for, for example, an automobile auxiliary machine or an electric motor used in appliances, IT, industrial equipment, etc., and the main component is silicone oil. A lubricant obtained by adding at least a rust inhibitor and silica gel to a certain lubricating oil is preferable for use in a sintered oil-impregnated bearing impregnated with the lubricating oil composition.

Claims (6)

  1. 　２５℃で２０～１０００ｍｍ2 ／ｓの動粘度を有するシリコーン油９０．０～９９．４質量％，一次粒子平均径が３０ｎｍ以下であるシリカゲルの群から選択される１種または２種以上の混合物０．１～５．０質量％，及び防錆剤の群から選択される１種または２種以上の混合物０．５～５．０質量％から成ることを特徴とするシリコーン系潤滑油組成物。 One or a mixture of two or more selected from the group of silica gels having a kinematic viscosity of 20 to 1000 mm 2 / s at 25 ° C., 90.0 to 99.4% by mass, and an average primary particle diameter of 30 nm or less A silicone-based lubricating oil composition comprising 0.1 to 5.0% by weight and 0.5 to 5.0% by weight of a mixture of one or more selected from the group of rust inhibitors .
  2. 　前記シリコーン油は，ジメチルシリコーン油，フェニルメチルシリコーン油，または変性シリコーン油の群から選択されることを特徴とする請求項１に記載のシリコーン系潤滑油組成物。 2. The silicone-based lubricating oil composition according to claim 1, wherein the silicone oil is selected from the group of dimethyl silicone oil, phenylmethyl silicone oil, or modified silicone oil.
  3. 　前記シリカゲルは，表面を有機基で修飾した疎水性シリカゲル，または表面にシラノール基を持った親水性シリカゲルであることを特徴とする請求項１または２に記載のシリコーン系潤滑油組成物。 3. The silicone-based lubricating oil composition according to claim 1, wherein the silica gel is a hydrophobic silica gel having a surface modified with an organic group, or a hydrophilic silica gel having a silanol group on the surface.
  4. 　前記防錆剤は，スルホン酸塩，カルボン酸，エステル，または複素環を分子内に持つ化合物であることを特徴とする請求項１～３のいずれか１項に記載のシリコーン系潤滑油組成物。 4. The silicone-based lubricating oil composition according to claim 1, wherein the rust inhibitor is a sulfonate, carboxylic acid, ester, or a compound having a heterocyclic ring in the molecule. .
  5. 　焼結含油軸受に使用されることを特徴とする請求項１～４のいずれか１項に記載のシリコーン系潤滑油組成物。 The silicone-based lubricating oil composition according to any one of claims 1 to 4, which is used in a sintered oil-impregnated bearing.
  6. 　請求項１～４のいずれか１項に記載のシリコーン系潤滑油組成物を含浸させたことを特徴とする焼結含油軸受。 A sintered oil-impregnated bearing impregnated with the silicone-based lubricating oil composition according to any one of claims 1 to 4.
PCT/JP2012/072050 2011-09-14 2012-08-30 Silicone-based lubricant composition and sintered oil-containing bearing impregnated therewith WO2013038920A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109294707A (en) * 2018-11-05 2019-02-01 肇庆欧迪斯实业有限公司 Slim rust preventive lubricating oil and its manufacture craft
CN114181756A (en) * 2021-12-24 2022-03-15 洛阳精一新材料科技有限公司 Lubricating oil for high-adhesion low-current oil-retaining bearing and preparation method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110437736A (en) * 2019-07-26 2019-11-12 广西柳钢东信科技有限公司 A kind of steel surface anti-corrosion protection liquid and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05209623A (en) * 1992-01-31 1993-08-20 Ntn Corp Oil impregnated sintered bearing
JP2003261892A (en) * 2002-03-11 2003-09-19 Japan Energy Corp Lubricating oil composition for sintered oil-retaining bearing
JP2010180331A (en) * 2009-02-06 2010-08-19 New Japan Chem Co Ltd Lubricating oil composition for dynamic pressure fluid bearing or for sintered, oil-impregnated bearing
JP2010195984A (en) * 2009-02-26 2010-09-09 Alps Electric Co Ltd Lubricating composition for use in electric contact

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0673389A (en) * 1992-08-28 1994-03-15 Idemitsu Kosan Co Ltd Lubricant containing water-repellent silica colloid
JP3922370B2 (en) * 2003-01-30 2007-05-30 信越化学工業株式会社 Dilatancy fluid composition
JP2005060482A (en) * 2003-08-08 2005-03-10 Nsk Ltd Grease composition for rolling bearing and rolling bearing
JP2005232433A (en) * 2004-01-19 2005-09-02 Ge Toshiba Silicones Co Ltd Grease composition for electrical contact
JP2010275384A (en) * 2009-05-27 2010-12-09 Sumico Lubricant Co Ltd Silicone grease based lubricant composition
JP2011069465A (en) * 2009-09-28 2011-04-07 Ntn Corp Guide roller
JP5513147B2 (en) * 2010-02-01 2014-06-04 リューベ株式会社 Grease composition and grease composition automatic greasing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05209623A (en) * 1992-01-31 1993-08-20 Ntn Corp Oil impregnated sintered bearing
JP2003261892A (en) * 2002-03-11 2003-09-19 Japan Energy Corp Lubricating oil composition for sintered oil-retaining bearing
JP2010180331A (en) * 2009-02-06 2010-08-19 New Japan Chem Co Ltd Lubricating oil composition for dynamic pressure fluid bearing or for sintered, oil-impregnated bearing
JP2010195984A (en) * 2009-02-26 2010-09-09 Alps Electric Co Ltd Lubricating composition for use in electric contact

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109294707A (en) * 2018-11-05 2019-02-01 肇庆欧迪斯实业有限公司 Slim rust preventive lubricating oil and its manufacture craft
CN114181756A (en) * 2021-12-24 2022-03-15 洛阳精一新材料科技有限公司 Lubricating oil for high-adhesion low-current oil-retaining bearing and preparation method thereof
CN114181756B (en) * 2021-12-24 2022-12-06 洛阳精一新材料科技有限公司 Lubricating oil for high-adhesion low-current oil-retaining bearing and preparation method thereof

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