WO2015001978A1 - Lubricant composition for chains, and chain - Google Patents

Lubricant composition for chains, and chain Download PDF

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Publication number
WO2015001978A1
WO2015001978A1 PCT/JP2014/066325 JP2014066325W WO2015001978A1 WO 2015001978 A1 WO2015001978 A1 WO 2015001978A1 JP 2014066325 W JP2014066325 W JP 2014066325W WO 2015001978 A1 WO2015001978 A1 WO 2015001978A1
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WO
WIPO (PCT)
Prior art keywords
lubricant composition
chain
less
mass
content
Prior art date
Application number
PCT/JP2014/066325
Other languages
French (fr)
Japanese (ja)
Inventor
邦仁 吉井
Original Assignee
株式会社椿本チエイン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社椿本チエイン filed Critical 株式会社椿本チエイン
Priority to US14/898,887 priority Critical patent/US20160137948A1/en
Priority to CN201480036734.3A priority patent/CN105339478A/en
Priority to DE112014003161.5T priority patent/DE112014003161T5/en
Publication of WO2015001978A1 publication Critical patent/WO2015001978A1/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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/76—Esters containing free hydroxy or carboxyl groups
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • 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
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/70—Esters of monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • 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
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/02—Driving-chains
    • F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links
    • 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
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic 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
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/40—Low content or no content compositions
    • 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
    • C10N2030/40—Low content or no content compositions
    • C10N2030/42—Phosphor free or low phosphor content compositions
    • 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
    • C10N2030/40—Low content or no content compositions
    • C10N2030/43—Sulfur free or low sulfur content compositions
    • 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
    • C10N2040/38—Conveyors or chain belts

Definitions

  • the present invention relates to a chain lubricant composition and a chain to which the same is applied.
  • Patent Document 1 discloses a lubricant composition containing a wax as a thickener. This lubricant composition has a consistency of 60 or more and 475 or less and a dropping point of 60 ° C. or more and 120 ° C. or less when measured according to the measurement method described in Japanese Industrial Standard (JIS) K 2220. .
  • JIS Japanese Industrial Standard
  • the appearance of the chain may be impaired by the blackening of the lubricant composition applied to the chain. Further, when the blackened lubricant composition is scattered around when the chain is used, it is easily noticeable as dirt. Patent Document 1 does not teach any improvement in the blackening of the chain.
  • An object of the present invention is to provide a lubricant composition for a chain that suppresses blackening of the chain and a chain to which the same is applied.
  • a chain lubricant composition contains a base oil, a thickener, and a rust inhibitor, and has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aroma.
  • the group content is 1% by mass or less.
  • a lubricant composition containing at least one of a sulfur content, a phosphorus content and an aromatic content at a predetermined concentration or more is easily blackened by heating.
  • the sulfur content in the lubricant composition is 100 mass ppm or less
  • the phosphorus content is 1 mass% or less
  • the aromatic content is 1 mass% or less
  • the sulfur content, the phosphorus content, and the aromatic content are The resulting blackening is suppressed.
  • the lubricant composition further contains an oily agent, and the oily agent is composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. Is preferred.
  • the said oil-based agent contains at least 1 type chosen from fatty acid ester and lanolin fatty-acid alcohol ester.
  • the lubricant composition is preferably used in a chain immersion bath.
  • a chain to which the lubricant composition is applied is provided.
  • blackening of the chain can be suppressed.
  • the lubricant composition contains a base oil, a thickener, and a rust inhibitor.
  • the sulfur content in the lubricant composition is 100 mass ppm or less, the phosphorus content is 1 mass% or less, and the aromatic content is 1 mass% or less.
  • the base oil preferably has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
  • the base oil is preferably at least one selected from mineral oil and synthetic oil. Mineral oils with low sulfur content and substantially no phosphorus content and aromatic content are preferred. Such mineral oils can be selected from those marketed as process oils. Examples of mineral oil components include paraffinic hydrocarbons such as liquid paraffin. Paraffin hydrocarbons have a paraffin carbon number (% CP) of 50 or more in ring analysis by the ndM method.
  • Synthetic oils include, for example, synthetic hydrocarbons (poly- ⁇ -olefin (PAO), ethylene and ⁇ -olefin co-oligomers, polybutene, etc.), esters, polyphenyl ethers, polyalkylene glycols, silicones, and fluorocarbons. It is done.
  • ester include hindered esters (dibasic acid esters, polyol esters, etc.), diesters, and silicate esters.
  • the lubricant composition can contain one or more base oils.
  • the content of the base oil in the lubricant composition is preferably 70% by mass or more.
  • the thickener is solid at normal temperature (25 ° C.) and has a function of thickening the base oil by being dispersed or dissolved in the base oil.
  • the thickener is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
  • As the thickener at least one selected from polymerized polyethylene wax and polymer is preferably used. Examples of the polymer include polymethacrylate and polyisobutylene.
  • the lubricant composition can contain one or more thickeners.
  • the content of the thickener in the lubricant composition is preferably 1% by mass or more.
  • the content of the thickener in the lubricant composition is preferably 25% by mass or less.
  • the rust inhibitor is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
  • a rust preventive agent for example, sorbitan rust preventive agent, lanolin rust preventive agent, succinic acid rust preventive agent, amine rust preventive agent, and metal soap are preferably used.
  • sorbitan rust preventive examples include sorbitan fatty acid esters (sorbitan monooleate, sorbitan tristearate, etc.).
  • lanolin-based rust preventive examples include lanolin fatty acid alcohol and lanolin fatty acid alcohol ester.
  • succinic acid-based rust preventive examples include alkyl succinic acid derivatives such as alkyl succinic anhydride.
  • examples of the amine-based rust preventive include organic acid amine salts and fatty acid amine salts.
  • the metal soap examples include lanolin fatty acid soap.
  • the lubricant composition can contain one or more rust inhibitors. It is preferable that a rust preventive agent contains sorbitan fatty acid ester.
  • the content of the rust inhibitor in the lubricant composition is preferably 1% by mass or more.
  • the content of the rust inhibitor in the lubricant composition is preferably 10% by mass or less.
  • An oily agent can be added to the lubricant composition.
  • the oily agent is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
  • examples of the oily agent include fatty acid esters, lanolin fatty acid alcohol esters, long chain fatty acids, long chain fatty acid salts, organic alcohols, and alkylamines.
  • the fatty acid ester is represented, for example, by the following general formula (1).
  • R 1 COOR 2 (1)
  • R 1 is a saturated or unsaturated alkyl group having 7 to 18 carbon atoms
  • R 2 is an alkyl group having 1 to 4 carbon atoms.
  • long-chain fatty acids include saturated or unsaturated fatty acids having 7 to 17 carbon atoms.
  • long chain fatty acids include stearic acid and oleic acid.
  • examples of the organic alcohol include lauryl alcohol.
  • examples of the alkylamine include stearylamine.
  • the lubricant composition can contain one or more oily agents.
  • the lubricant composition preferably contains an oily agent, and the oily agent more preferably contains at least one selected from fatty acid esters and lanolin fatty acid alcohol esters.
  • the content of the oily agent in the lubricant composition is preferably in the range of 1% by mass to 10% by mass. More preferably, the lubricant composition contains a fatty acid ester in a range of 1% by mass or more and 10% by mass or less.
  • an extreme pressure agent, an antioxidant, and an antifoaming agent can be added to the lubricant composition.
  • the sulfur content in the lubricant composition can be quantified by, for example, a method defined in JIS K2541.
  • the phosphorus content in the lubricant composition can be quantified by, for example, plasma emission spectrometry.
  • the aromatic content in the lubricant composition can be quantified, for example, by ring analysis by the ndM method.
  • the chain 11 of this embodiment is a roller chain, and has a configuration in which adjacent inner links 21 and outer links 31 are rotatably connected.
  • the inner link 21 is rotatably attached around the two inner plates 22, 23 disposed opposite to each other, cylindrical bushes 24, 25 that support the inner plates 22, 23, and the bushes 24, 25. Cylindrical rollers 26 and 27 are provided.
  • the inner plates 22 and 23 are held by the bushes 24 and 25 so as to be separated from each other.
  • the inner plate 22 has through holes 22 a and 22 b at both ends in the longitudinal direction of the chain 11.
  • the inner plate 23 has through holes 23a and 23b at both ends.
  • the hole of the bush 24 opens through the through holes 22a and 23a to the outer surface on the opposite side of the surface facing the inner plates 22 and 23.
  • the hole of the bush 25 is opened through the through holes 22b and 23b to the outer surface on the opposite side of the surface facing the inner plates 22 and 23.
  • the outer link 31 has two outer plates 32 and 33 arranged opposite to each other, and two columnar pins 34 and 35 connecting the outer plates 32 and 33.
  • the outer plates 32 and 33 are held apart from each other by being connected by pins 34 and 35.
  • the pins 34 and 35 are inserted into the bush 25 of the inner link 21 and the bush 24 of another inner link 21 arranged adjacent to the inner link 21, respectively. Thereby, two adjacent inner links 21 are connected via the outer link 31.
  • the chain 11 can be formed from a steel material, for example.
  • Application of the lubricant composition to the chain 11 includes, for example, immersing the chain 11 in the lubricant composition and placing the lubricant composition between the outer peripheral surface of the pins 34 and 35 and the inner peripheral surface of the bushes 24 and 25. Done by supplying.
  • the lubricant composition is preferably maintained at a temperature equal to or higher than the melting point of the thickener. For example, when the lubricant composition is heated to a temperature of 100 ° C. or higher, the lubricant composition easily flows between the outer peripheral surfaces of the pins 34 and 35 and the inner peripheral surfaces of the bushes 24 and 25.
  • a tank for chain immersion In the above immersion, a tank for chain immersion is used. In this tank, the lubricant composition is maintained in a heated state. After the chain 11 is immersed in the heated lubricant composition for a predetermined time, the chain 11 is carried out of the tank, and then a new chain 11 is immersed in the lubricant composition in the tank. Thus, in the tank for chain immersion, application of the lubricant composition to the chain 11, that is, lubrication is repeated. Depending on the amount of lubricant composition reduced by application to the chain 11, a new lubricant composition is replenished in the tank.
  • the lubricant composition of the present embodiment does not substantially contain components that cause blackening, that is, sulfur, phosphorus, and aromatics, or contains at a very low concentration. Therefore, blackening of the lubricant composition is suppressed even when the lubricant composition is maintained in a state where the lubricant composition is heated in the chain immersion bath. That is, the lubricant composition of this embodiment can easily maintain its original color (for example, brown or light brown) even in a heated state.
  • the lubricant composition contains a base oil, a thickener, and a rust inhibitor, and has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. is there.
  • blackening of the lubricant composition due to the sulfur content, the phosphorus content, and the aromatic content can be suppressed. Therefore, the blackening of the chain 11 to which the lubricant composition is applied can be suppressed, and the chain 11 having a good appearance can be obtained.
  • the rust inhibitor added to the lubricant composition preferably contains a sorbitan fatty acid ester.
  • sorbitan fatty acid esters in particular can exhibit a rust prevention effect in a relatively small amount. Since the sorbitan fatty acid ester does not substantially contain a sulfur content, a phosphorus content, and an aromatic content, blackening of the lubricant composition due to the sulfur content, the phosphorus content, and the aromatic content can be suppressed.
  • Sorbitan fatty acid ester or lanolin fatty acid alcohol ester has a function of hindering crystallization of the thickener in the lubricant composition. For this reason, even if a part of the thickener is solidified in the lubricant composition, the appearance of the chain 11 is improved by making it difficult to visually recognize the solidified thickener.
  • the high temperature in the tank for dipping the chain is one of the causes of the blackening of the lubricant composition.
  • the lubricant composition of this embodiment is particularly advantageous in that it is resistant to blackening even in such a high-temperature chain immersion bath.
  • the lubricant composition needs to be replaced with a newly prepared lubricant composition. Occurs. As the frequency of replacement increases, the labor and cost of the replacement work increase. However, since the lubricant composition of this embodiment is resistant to blackening, the frequency of replacement of the lubricant composition due to blackening can be reduced.
  • blended with a lubricant composition may exceed 100 mass ppm.
  • the sulfur content in the lubricant composition can be adjusted to 100 ppm by mass or less. it can. That is, the concentration of at least one of the sulfur content, the phosphorus content, and the aromatic content in the raw material of the lubricant composition may exceed those concentrations in the lubricant composition specified above.
  • the chain to which the lubricant composition is applied is not limited to the roller chain, and may be a bush chain in which the rollers 26 and 27 are omitted, for example.
  • the lubricant composition is applied for so-called pre-lubrication of the chain 11.
  • the lubricant composition can also be applied for the maintenance of the chain 11 while the chain 11 is in use, i.e. outside the tank for dipping the chain. Even in this case, for example, the blackening of the chain 11 due to heat generation during use of the chain 11 or heating due to the use environment can be suppressed.
  • the base oil, thickener, rust inhibitor, and other components were subjected to a blackening test as described below. (Blackening test of base oil)
  • the base oil shown in Table 1 was maintained at 150 ° C., and blackening was evaluated according to the following criteria.
  • Highly refined mineral oil is substantially free of phosphorus and aromatics.
  • the content of sulfur in the highly refined mineral oil is several tens of mass ppm or less.
  • Synthetic hydrocarbons are substantially free of sulfur, phosphorus and aromatics.
  • Example 1 The lubricant composition of each Example was prepared by mixing each raw material according to the composition shown in Table 5.
  • the base oil in Table 5 is a highly refined mineral oil (trade name: Sunpure P100, manufactured by Nippon Sun Oil Co., Ltd.), and the thickener is polyethylene wax (Mitsui High Wax 200P, manufactured by Mitsui Chemicals, Inc.).
  • the rust preventive agent in Table 5 is sorbitan fatty acid ester, and the oily agent is fatty acid ester.
  • the lubricant composition of each Example was prepared such that the sulfur content was 100 mass ppm or less, the phosphorus content was 1 mass% or less, and the aromatic content was 1 mass% or less.
  • Comparative Examples 1 and 2 The lubricant composition of each comparative example was prepared by mixing each raw material according to the composition shown in Table 5. As extreme pressure agents in Table 5, Comparative Example 1 used sulfurized olefins and Comparative Example 2 used dialkyldithiophosphates. The content of sulfur contained in the lubricant composition of each comparative example exceeded 100 mass ppm.
  • the obtained lubricant compositions of Examples and Comparative Examples were respectively supplied to a chain immersion bath and maintained at 150 ° C. for 1000 hours. As a result, blackening was not confirmed in the lubricant composition of each Example. On the other hand, blackening was confirmed within 100 hours in the lubricant composition of each comparative example.
  • the chain 11 shown in FIGS. 1 and 2 was immersed in the lubricant compositions of the examples and comparative examples in a chain immersion bath. After 10 minutes, the chain 11 was taken out from the tank.
  • the chain 11 to which the lubricant composition of each example was applied had a good appearance without blackening. In the chain 11 to which the lubricant composition of each comparative example was applied, blackening was observed and the appearance was poor.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)

Abstract

A lubricant composition for chains comprises a base oil, a thickening agent and an anti-corrosive agent. The lubricant composition has a sulfur content of 100 ppm by mass or less, a phosphorus content of 1% by mass or less and an aromatic component content of 1% by mass or less.

Description

チェーン用潤滑剤組成物及びチェーンLubricant composition for chain and chain
　本発明は、チェーン用潤滑剤組成物及びそれを適用したチェーンに関する。 The present invention relates to a chain lubricant composition and a chain to which the same is applied.
　従来、基油と増粘剤とを含有するチェーン用潤滑剤組成物が知られている。例えば、特許文献１には、増粘剤としてワックスを含有する潤滑剤組成物が開示されている。この潤滑剤組成物は、日本工業規格（ＪＩＳ）Ｋ　２２２０に記載の測定方法に準じて測定した場合、６０以上４７５以下のちょう度を有し、かつ６０℃以上１２０℃以下の滴点を有する。 Conventionally, a lubricant composition for a chain containing a base oil and a thickener is known. For example, Patent Document 1 discloses a lubricant composition containing a wax as a thickener. This lubricant composition has a consistency of 60 or more and 475 or less and a dropping point of 60 ° C. or more and 120 ° C. or less when measured according to the measurement method described in Japanese Industrial Standard (JIS) K 2220. .
特開２００９－１４４００５号公報JP 2009-144005 A
　チェーンの外観は、チェーンに適用された潤滑剤組成物の黒色化によって損なわれることがある。また、黒色化した潤滑剤組成物が、チェーンの使用時に周囲に飛散した場合、汚れとして目立ち易い。特許文献１は、チェーンの黒色化の改善について何ら教示していない。 The appearance of the chain may be impaired by the blackening of the lubricant composition applied to the chain. Further, when the blackened lubricant composition is scattered around when the chain is used, it is easily noticeable as dirt. Patent Document 1 does not teach any improvement in the blackening of the chain.
　本発明の目的は、チェーンの黒色化を抑制するチェーン用潤滑剤組成物及びそれを適用したチェーンを提供することにある。 An object of the present invention is to provide a lubricant composition for a chain that suppresses blackening of the chain and a chain to which the same is applied.
　本発明の一態様によれば、チェーン用潤滑剤組成物は、基油、増粘剤、及び防錆剤を含有し、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下である。 According to one aspect of the present invention, a chain lubricant composition contains a base oil, a thickener, and a rust inhibitor, and has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aroma. The group content is 1% by mass or less.
　本発明者は、硫黄分、リン分及び芳香族分のうち少なくとも一つを所定の濃度以上で含有する潤滑剤組成物は、加熱により黒色化し易いことを見いだした。逆に言えば、潤滑剤組成物中の硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下である場合、硫黄分、リン分及び芳香族分に起因する黒色化が抑制される。 The present inventor has found that a lubricant composition containing at least one of a sulfur content, a phosphorus content and an aromatic content at a predetermined concentration or more is easily blackened by heating. Conversely, when the sulfur content in the lubricant composition is 100 mass ppm or less, the phosphorus content is 1 mass% or less, and the aromatic content is 1 mass% or less, the sulfur content, the phosphorus content, and the aromatic content are The resulting blackening is suppressed.
　上記潤滑剤組成物は、さらに、油性剤を含有し、前記油性剤は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下の化合物からなることが好ましい。 The lubricant composition further contains an oily agent, and the oily agent is composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. Is preferred.
　上記潤滑剤組成物について、前記油性剤は、脂肪酸エステル及びラノリン脂肪酸アルコールエステルから選ばれる少なくとも一種を含むことが好ましい。
　上記潤滑剤組成物は、チェーン浸漬用の槽内で用いられることが好ましい。 About the said lubricant composition, it is preferable that the said oil-based agent contains at least 1 type chosen from fatty acid ester and lanolin fatty-acid alcohol ester.
The lubricant composition is preferably used in a chain immersion bath.
　本発明の別の態様によれば、前記潤滑剤組成物を適用したチェーンが提供される。 According to another aspect of the present invention, a chain to which the lubricant composition is applied is provided.
　本発明によれば、チェーンの黒色化を抑制することができる。 According to the present invention, blackening of the chain can be suppressed.
実施形態のチェーンの一部を概略的に示す分解斜視図。The disassembled perspective view which shows a part of chain of embodiment schematically. チェーンを概略的に示す部分断面図。The fragmentary sectional view which shows a chain roughly.
　以下、潤滑剤組成物及びチェーンの実施形態について説明する。
　潤滑剤組成物は、基油、増粘剤、及び防錆剤を含有する。潤滑剤組成物中の硫黄分は１００質量ｐｐｍ以下、リン分は１質量％以下、かつ芳香族分は１質量％以下である。 Hereinafter, embodiments of the lubricant composition and the chain will be described.
The lubricant composition contains a base oil, a thickener, and a rust inhibitor. The sulfur content in the lubricant composition is 100 mass ppm or less, the phosphorus content is 1 mass% or less, and the aromatic content is 1 mass% or less.
　＜基油＞
　基油は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下であることが好ましい。基油は、好ましくは鉱油及び合成油から選ばれる少なくとも一種である。硫黄分の含有量が少なく、リン分及び芳香族分を実質的に含有しない鉱油が好適である。こうした鉱油は、プロセス油として市販されるものから選択することができる。鉱油の成分としては、流動パラフィン等のパラフィン系炭化水素が挙げられる。パラフィン系炭化水素は、ｎ－ｄ－Ｍ法による環分析において、パラフィン炭素数（％ＣＰ）が５０以上を示すものである。 <Base oil>
The base oil preferably has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. The base oil is preferably at least one selected from mineral oil and synthetic oil. Mineral oils with low sulfur content and substantially no phosphorus content and aromatic content are preferred. Such mineral oils can be selected from those marketed as process oils. Examples of mineral oil components include paraffinic hydrocarbons such as liquid paraffin. Paraffin hydrocarbons have a paraffin carbon number (% CP) of 50 or more in ring analysis by the ndM method.
　合成油としては、例えば、合成炭化水素（ポリ－α－オレフィン（ＰＡＯ）、エチレンとα－オレフィンとのコオリゴマー、ポリブテン等）、エステル、ポリフェニルエーテル、ポリアルキレングリコール、シリコーン、及びフルオロカーボンが挙げられる。エステルとしては、例えば、ヒンダードエステル（二塩基酸エステル、ポリオールエステル等）、ジエステル、及びケイ酸エステルが挙げられる。 Synthetic oils include, for example, synthetic hydrocarbons (poly-α-olefin (PAO), ethylene and α-olefin co-oligomers, polybutene, etc.), esters, polyphenyl ethers, polyalkylene glycols, silicones, and fluorocarbons. It is done. Examples of the ester include hindered esters (dibasic acid esters, polyol esters, etc.), diesters, and silicate esters.
　潤滑剤組成物は、一種又は二種以上の基油を含有することができる。
　潤滑剤組成物中の基油の含有量は、好ましくは７０質量％以上である。
　＜増粘剤＞
　増粘剤は、常温（２５℃）で固体状であり、基油に分散又は溶解することで基油を増粘する働きを有する。増粘剤は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、及び芳香族分が１質量％以下の化合物からなることが好ましい。増粘剤としては、重合型ポリエチレンワックス及びポリマーから選ばれる少なくとも一種が好適に用いられる。ポリマーとしては、例えば、ポリメタクリレート、及びポリイソブチレンが挙げられる。 The lubricant composition can contain one or more base oils.
The content of the base oil in the lubricant composition is preferably 70% by mass or more.
<Thickener>
The thickener is solid at normal temperature (25 ° C.) and has a function of thickening the base oil by being dispersed or dissolved in the base oil. The thickener is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. As the thickener, at least one selected from polymerized polyethylene wax and polymer is preferably used. Examples of the polymer include polymethacrylate and polyisobutylene.
　潤滑剤組成物は、一種又は二種以上の増粘剤を含有することができる。
　潤滑剤組成物中の増粘剤の含有量は、好ましくは１質量％以上である。潤滑剤組成物中の増粘剤の含有量は、好ましくは２５質量％以下である。 The lubricant composition can contain one or more thickeners.
The content of the thickener in the lubricant composition is preferably 1% by mass or more. The content of the thickener in the lubricant composition is preferably 25% by mass or less.
　＜防錆剤＞
　防錆剤は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、及び芳香族分が１質量％以下の化合物からなることが好ましい。防錆剤としては、例えば、ソルビタン系防錆剤、ラノリン系防錆剤、コハク酸系防錆剤、アミン系防錆剤、及び金属石けんが好適に用いられる。 <Rust preventive>
The rust inhibitor is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. As the rust preventive agent, for example, sorbitan rust preventive agent, lanolin rust preventive agent, succinic acid rust preventive agent, amine rust preventive agent, and metal soap are preferably used.
　ソルビタン系防錆剤としては、例えば、ソルビタン脂肪酸エステル（ソルビタンモノオレエート、ソルビタントリステアレート等）が挙げられる。
　ラノリン系防錆剤としては、例えば、ラノリン脂肪酸アルコール、及びラノリン脂肪酸アルコールエステルが挙げられる。 Examples of the sorbitan rust preventive include sorbitan fatty acid esters (sorbitan monooleate, sorbitan tristearate, etc.).
Examples of the lanolin-based rust preventive include lanolin fatty acid alcohol and lanolin fatty acid alcohol ester.
　コハク酸系防錆剤としては、例えば、無水アルキルコハク酸等のアルキルコハク酸誘導体が挙げられる。
　アミン系防錆剤としては、例えば、有機酸アミン塩、及び脂肪酸アミン塩が挙げられる。 Examples of the succinic acid-based rust preventive include alkyl succinic acid derivatives such as alkyl succinic anhydride.
Examples of the amine-based rust preventive include organic acid amine salts and fatty acid amine salts.
　金属石けんとしては、例えば、ラノリン脂肪酸石けんが挙げられる。
　潤滑剤組成物は、一種又は二種以上の防錆剤を含有することができる。防錆剤は、ソルビタン脂肪酸エステルを含むことが好ましい。 Examples of the metal soap include lanolin fatty acid soap.
The lubricant composition can contain one or more rust inhibitors. It is preferable that a rust preventive agent contains sorbitan fatty acid ester.
　潤滑剤組成物中の防錆剤の含有量は、好ましくは１質量％以上である。潤滑剤組成物中の防錆剤の含有量は、好ましくは１０質量％以下である。
　＜その他の成分＞
　潤滑剤組成物には、油性剤を添加することができる。 The content of the rust inhibitor in the lubricant composition is preferably 1% by mass or more. The content of the rust inhibitor in the lubricant composition is preferably 10% by mass or less.
<Other ingredients>
An oily agent can be added to the lubricant composition.
　油性剤は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、及び芳香族分が１質量％以下の化合物からなることが好ましい。
　油性剤としては、例えば、脂肪酸エステル、ラノリン脂肪酸アルコールエステル、長鎖脂肪酸、長鎖脂肪酸塩、有機アルコール、及びアルキルアミンが挙げられる。脂肪酸エステルは、例えば、下記一般式（１）で表される。 The oily agent is preferably composed of a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
Examples of the oily agent include fatty acid esters, lanolin fatty acid alcohol esters, long chain fatty acids, long chain fatty acid salts, organic alcohols, and alkylamines. The fatty acid ester is represented, for example, by the following general formula (1).
　Ｒ１ＣＯＯＲ２　・・・（１）
　一般式（１）中、Ｒ１は炭素数７～１８の飽和又は不飽和アルキル基であり、Ｒ２は炭素数１～４のアルキル基である。 R 1 COOR 2 (1)
In general formula (1), R 1 is a saturated or unsaturated alkyl group having 7 to 18 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms.
　ラノリン脂肪酸アルコールエステルとしては、例えば、ラノリン脂肪酸ラノリンアルコールエステル（商品名：Ｅｃｏｌａｎｏ　ＬＹ，ＬＣ、日本精化株式会社製）、及びラノリン脂肪酸ペンタエリスリトールエステル（商品名：ネオコートＥＰＳ－２，ＥＰＳ－２４、日本精化株式会社製）が挙げられる。ラノリン脂肪酸アルコールエステルは、防錆効果を高める作用も有する。 Examples of the lanolin fatty acid alcohol ester include lanolin fatty acid lanolin alcohol ester (trade name: Ecolano LY, LC, manufactured by Nippon Seika Co., Ltd.), and lanolin fatty acid pentaerythritol ester (trade name: Neocoat EPS-2, EPS-24, Nippon Seika Co., Ltd.). Lanolin fatty acid alcohol ester also has an action of enhancing the antirust effect.
　長鎖脂肪酸としては、炭素数７～１７の飽和又は不飽和脂肪酸が挙げられる。長鎖脂肪酸としては、例えば、ステアリン酸及びオレイン酸が挙げられる。有機アルコールとしては、例えば、ラウリルアルコールが挙げられる。アルキルアミンとしては、例えばステアリルアミンが挙げられる。 Examples of long-chain fatty acids include saturated or unsaturated fatty acids having 7 to 17 carbon atoms. Examples of long chain fatty acids include stearic acid and oleic acid. Examples of the organic alcohol include lauryl alcohol. Examples of the alkylamine include stearylamine.
　潤滑剤組成物は、一種又は二種以上の油性剤を含有することができる。
　潤滑剤組成物は、油性剤を含有することが好ましく、その油性剤は脂肪酸エステル及びラノリン脂肪酸アルコールエステルから選ばれる少なくとも一種を含むことがより好ましい。 The lubricant composition can contain one or more oily agents.
The lubricant composition preferably contains an oily agent, and the oily agent more preferably contains at least one selected from fatty acid esters and lanolin fatty acid alcohol esters.
　潤滑剤組成物中の油性剤の含有量は、好ましくは１質量％以上、１０質量％以下の範囲である。潤滑剤組成物は、脂肪酸エステルを１質量％以上、１０質量％以下の範囲で含有することがより好ましい。 The content of the oily agent in the lubricant composition is preferably in the range of 1% by mass to 10% by mass. More preferably, the lubricant composition contains a fatty acid ester in a range of 1% by mass or more and 10% by mass or less.
　潤滑剤組成物には、必要に応じて、極圧剤、酸化防止剤、及び消泡剤を添加することもできる。
　＜潤滑剤組成物中の硫黄分、リン分及び芳香族分＞
　潤滑剤組成物中の硫黄分は、例えば、ＪＩＳ　Ｋ２５４１に規定される方法で定量することができる。潤滑剤組成物中のリン分は、例えば、プラズマ発光分光分析で定量することができる。潤滑剤組成物中の芳香族分は、例えば、ｎ－ｄ－Ｍ法による環分析で定量することができる。 If necessary, an extreme pressure agent, an antioxidant, and an antifoaming agent can be added to the lubricant composition.
<Sulfur content, phosphorus content and aromatic content in the lubricant composition>
The sulfur content in the lubricant composition can be quantified by, for example, a method defined in JIS K2541. The phosphorus content in the lubricant composition can be quantified by, for example, plasma emission spectrometry. The aromatic content in the lubricant composition can be quantified, for example, by ring analysis by the ndM method.
　＜潤滑剤組成物の調製方法＞
　潤滑剤組成物は、基油、増粘剤及び防錆剤を周知の撹拌機で撹拌することで調製される。このとき、必要に応じて潤滑剤組成物に油性剤等を添加する。潤滑剤組成物の調製は、増粘剤の溶融温度以上の温度で行うことが好ましい。 <Method for preparing lubricant composition>
The lubricant composition is prepared by stirring the base oil, the thickener and the rust preventive agent with a well-known stirrer. At this time, an oily agent or the like is added to the lubricant composition as necessary. The preparation of the lubricant composition is preferably performed at a temperature equal to or higher than the melting temperature of the thickener.
　＜チェーンの構成＞
　図１に示すように、本実施形態のチェーン１１は、ローラチェーンであり、隣り合う内リンク２１と外リンク３１が回動自在に連結された構成を有する。 <Chain structure>
As shown in FIG. 1, the chain 11 of this embodiment is a roller chain, and has a configuration in which adjacent inner links 21 and outer links 31 are rotatably connected.
　内リンク２１は、互いに対向して配置される２つの内プレート２２，２３と、内プレート２２，２３を支持する円筒状のブシュ２４，２５と、ブシュ２４，２５の周りに回転自在に取り付けられる円筒状のローラ２６，２７とを備えている。 The inner link 21 is rotatably attached around the two inner plates 22, 23 disposed opposite to each other, cylindrical bushes 24, 25 that support the inner plates 22, 23, and the bushes 24, 25. Cylindrical rollers 26 and 27 are provided.
　内プレート２２，２３は、ブシュ２４，２５により連結されることで、互いに離間した状態で保持されている。
　内プレート２２は、チェーン１１の長手方向における両端部に、貫通孔２２ａ，２２ｂを有している。内プレート２３も同様に、両端部に貫通孔２３ａ，２３ｂを有している。ブシュ２４の孔は、貫通孔２２ａ，２３ａを通じて内プレート２２，２３の対向する面とは反対側の外面に開口している。ブシュ２５の孔も同様に、貫通孔２２ｂ，２３ｂを通じて内プレート２２，２３の対向する面とは反対側の外面に開口している。 The inner plates 22 and 23 are held by the bushes 24 and 25 so as to be separated from each other.
The inner plate 22 has through holes 22 a and 22 b at both ends in the longitudinal direction of the chain 11. Similarly, the inner plate 23 has through holes 23a and 23b at both ends. The hole of the bush 24 opens through the through holes 22a and 23a to the outer surface on the opposite side of the surface facing the inner plates 22 and 23. Similarly, the hole of the bush 25 is opened through the through holes 22b and 23b to the outer surface on the opposite side of the surface facing the inner plates 22 and 23.
　外リンク３１は、互いに対向して配置される２つの外プレート３２，３３と、外プレート３２，３３を連結する２つの円柱状のピン３４，３５とを有している。外プレート３２，３３は、ピン３４，３５により連結されることで、互いに離間した状態で保持されている。 The outer link 31 has two outer plates 32 and 33 arranged opposite to each other, and two columnar pins 34 and 35 connecting the outer plates 32 and 33. The outer plates 32 and 33 are held apart from each other by being connected by pins 34 and 35.
　ピン３４，３５は、内リンク２１のブシュ２５と、その内リンク２１に隣り合って配置される別の内リンク２１のブシュ２４とにそれぞれ挿入されている。これにより、隣り合う２つの内リンク２１は、外リンク３１を介して連結される。 The pins 34 and 35 are inserted into the bush 25 of the inner link 21 and the bush 24 of another inner link 21 arranged adjacent to the inner link 21, respectively. Thereby, two adjacent inner links 21 are connected via the outer link 31.
　図２に示すように、ピン３４，３５の外周面とブシュ２４，２５の内周面との間には隙間が形成されている。チェーン１１は、例えば、鋼材から形成することができる。
　＜潤滑剤組成物の使用方法及び作用＞
　潤滑剤組成物のチェーン１１への適用は、例えば、潤滑剤組成物にチェーン１１を浸漬し、ピン３４，３５の外周面とブシュ２４，２５の内周面との間に潤滑剤組成物を供給することによって行われる。この浸漬において、潤滑剤組成物は、増粘剤の融点以上の温度で維持されることが好ましい。潤滑剤組成物は、例えば１００℃以上の温度に加熱されると、ピン３４，３５の外周面とブシュ２４，２５の内周面との間に流入し易くなる。 As shown in FIG. 2, a gap is formed between the outer peripheral surface of the pins 34 and 35 and the inner peripheral surface of the bushes 24 and 25. The chain 11 can be formed from a steel material, for example.
<Use and action of lubricant composition>
Application of the lubricant composition to the chain 11 includes, for example, immersing the chain 11 in the lubricant composition and placing the lubricant composition between the outer peripheral surface of the pins 34 and 35 and the inner peripheral surface of the bushes 24 and 25. Done by supplying. In this immersion, the lubricant composition is preferably maintained at a temperature equal to or higher than the melting point of the thickener. For example, when the lubricant composition is heated to a temperature of 100 ° C. or higher, the lubricant composition easily flows between the outer peripheral surfaces of the pins 34 and 35 and the inner peripheral surfaces of the bushes 24 and 25.
　上述した浸漬では、チェーン浸漬用の槽が用いられる。この槽内では、潤滑剤組成物が加熱された状態で維持される。この加熱された潤滑剤組成物にチェーン１１が所定時間浸漬された後に、そのチェーン１１は槽内から搬出され、続いて新たなチェーン１１が槽内の潤滑剤組成物に浸漬される。このようにチェーン浸漬用の槽内では、潤滑剤組成物のチェーン１１への適用、すなわち給油が繰り返される。チェーン１１への適用により減少した潤滑剤組成物の量に応じて、新たな潤滑剤組成物が槽内に補給される。 In the above immersion, a tank for chain immersion is used. In this tank, the lubricant composition is maintained in a heated state. After the chain 11 is immersed in the heated lubricant composition for a predetermined time, the chain 11 is carried out of the tank, and then a new chain 11 is immersed in the lubricant composition in the tank. Thus, in the tank for chain immersion, application of the lubricant composition to the chain 11, that is, lubrication is repeated. Depending on the amount of lubricant composition reduced by application to the chain 11, a new lubricant composition is replenished in the tank.
　本実施形態の潤滑剤組成物は、黒色化の要因となる成分、すなわち硫黄分、リン分、及び芳香族分を実質的に含有しないか、又は、極めて低濃度で含有する。したがって、チェーン浸漬用の槽内に潤滑剤組成物が加熱された状態で長時間維持される場合でも、潤滑剤組成物の黒色化が抑制される。すなわち、本実施形態の潤滑剤組成物は、加熱された状態においても、その本来の色（例えば、褐色又は淡褐色）を維持し易い。 The lubricant composition of the present embodiment does not substantially contain components that cause blackening, that is, sulfur, phosphorus, and aromatics, or contains at a very low concentration. Therefore, blackening of the lubricant composition is suppressed even when the lubricant composition is maintained in a state where the lubricant composition is heated in the chain immersion bath. That is, the lubricant composition of this embodiment can easily maintain its original color (for example, brown or light brown) even in a heated state.
　チェーン１１は、例えば、物品の搬送又は動力の伝達に用いられる。チェーン１１は、例えば、複数のスプロケットに巻回されて用いられる。このとき、潤滑剤組成物はピン３４，３５の外周面とブシュ２４，２５の内周面との間などを潤滑にする。 The chain 11 is used for conveying articles or transmitting power, for example. For example, the chain 11 is wound around a plurality of sprockets. At this time, the lubricant composition lubricates between the outer peripheral surfaces of the pins 34 and 35 and the inner peripheral surfaces of the bushes 24 and 25.
　以上詳述した本実施形態によれば、次のような効果が発揮される。
　（１）潤滑剤組成物は、基油、増粘剤、及び防錆剤を含有し、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下である。この構成により、硫黄分、リン分、及び芳香族分に起因する潤滑剤組成物の黒色化を抑制することができる。従って、潤滑剤組成物を適用したチェーン１１の黒色化を抑制することができ、外観の良好なチェーン１１を得ることができる。 According to the embodiment described in detail above, the following effects are exhibited.
(1) The lubricant composition contains a base oil, a thickener, and a rust inhibitor, and has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. is there. With this configuration, blackening of the lubricant composition due to the sulfur content, the phosphorus content, and the aromatic content can be suppressed. Therefore, the blackening of the chain 11 to which the lubricant composition is applied can be suppressed, and the chain 11 having a good appearance can be obtained.
　（２）潤滑剤組成物は、さらに油性剤を含有し、この油性剤は、硫黄分が１００質量ｐｐｍ以下であり、リン分が１質量％以下であり、かつ芳香族分が１質量％以下の化合物からなることが好ましい。この構成によれば、例えばチェーン摩耗寿命を改善するために、潤滑剤組成物に油性剤を添加した場合であっても、チェーン１１の黒色化を抑制することができる。こうした油性剤は、例えば、脂肪酸エステル及びラノリン脂肪酸アルコールエステルから選ばれる少なくとも一種を含むことが好適である。 (2) The lubricant composition further contains an oily agent. The oily agent has a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. It is preferable to consist of these compounds. According to this configuration, for example, in order to improve the chain wear life, blackening of the chain 11 can be suppressed even when an oily agent is added to the lubricant composition. Such an oily agent preferably contains, for example, at least one selected from fatty acid esters and lanolin fatty acid alcohol esters.
　（３）潤滑剤組成物に添加される防錆剤は、ソルビタン脂肪酸エステルを含むことが好ましい。防錆剤の中でも特にソルビタン脂肪酸エステルは、比較的少量で防錆効果を発揮することができる。ソルビタン脂肪酸エステルは、硫黄分、リン分及び芳香族分を実質的に含有しないため、硫黄分、リン分、及び芳香族分に起因する潤滑剤組成物の黒色化を抑制することができる。 (3) The rust inhibitor added to the lubricant composition preferably contains a sorbitan fatty acid ester. Among rust inhibitors, sorbitan fatty acid esters in particular can exhibit a rust prevention effect in a relatively small amount. Since the sorbitan fatty acid ester does not substantially contain a sulfur content, a phosphorus content, and an aromatic content, blackening of the lubricant composition due to the sulfur content, the phosphorus content, and the aromatic content can be suppressed.
　（４）ソルビタン脂肪酸エステル又はラノリン脂肪酸アルコールエステルは、潤滑剤組成物中の増粘剤の結晶化を妨げる働きを有する。このため、潤滑剤組成物中で増粘剤の一部が固化したとしても、その固化した増粘剤が視認され難くなることで、チェーン１１の外観が改善される。 (4) Sorbitan fatty acid ester or lanolin fatty acid alcohol ester has a function of hindering crystallization of the thickener in the lubricant composition. For this reason, even if a part of the thickener is solidified in the lubricant composition, the appearance of the chain 11 is improved by making it difficult to visually recognize the solidified thickener.
　（５）チェーン浸漬用の槽内の高温は、潤滑剤組成物の黒色化を進行させる原因の一つである。本実施形態の潤滑剤組成物は、このような高温のチェーン浸漬用の槽内においても黒色化に対し耐性である点で特に有利である。例えば、黒色化に対し耐性でない潤滑剤組成物の場合、チェーン浸漬用の槽内で潤滑剤組成物が黒色化すると、その潤滑剤組成物と新たに調製した潤滑剤組成物とを交換する必要が生じる。その交換の頻度が高くなるほど、交換作業の手間とコストが増す。しかしながら、本実施形態の潤滑剤組成物は黒色化に対し耐性であるため、黒色化に起因する潤滑剤組成物の交換の頻度を低減することができる。 (5) The high temperature in the tank for dipping the chain is one of the causes of the blackening of the lubricant composition. The lubricant composition of this embodiment is particularly advantageous in that it is resistant to blackening even in such a high-temperature chain immersion bath. For example, in the case of a lubricant composition that is not resistant to blackening, if the lubricant composition is blackened in a chain immersion bath, the lubricant composition needs to be replaced with a newly prepared lubricant composition. Occurs. As the frequency of replacement increases, the labor and cost of the replacement work increase. However, since the lubricant composition of this embodiment is resistant to blackening, the frequency of replacement of the lubricant composition due to blackening can be reduced.
　（変更例）
　前記実施形態を次のように変更することもできる。
　・潤滑剤組成物に配合される基油中の硫黄分の含有量は、１００質量ｐｐｍを超えていてもよい。この場合、例えば増粘剤及び防錆剤として、それぞれ硫黄分を実質的に含有しない化合物を選択することで、潤滑剤組成物中における硫黄分の含有量を１００質量ｐｐｍ以下に調整することができる。すなわち、潤滑剤組成物の原料中の硫黄分、リン分、及び芳香族分の少なくとも一つの濃度は、上記で特定した潤滑剤組成物中のそれらの濃度を超えていてもよい。 (Example of change)
The embodiment described above can be modified as follows.
-Content of the sulfur content in the base oil mix | blended with a lubricant composition may exceed 100 mass ppm. In this case, for example, by selecting a compound that substantially does not contain a sulfur component as a thickener and a rust preventive agent, the sulfur content in the lubricant composition can be adjusted to 100 ppm by mass or less. it can. That is, the concentration of at least one of the sulfur content, the phosphorus content, and the aromatic content in the raw material of the lubricant composition may exceed those concentrations in the lubricant composition specified above.
　・潤滑剤組成物が適用されるチェーンは、ローラチェーンに限定されず、例えば、ローラ２６，２７を省略したブシュチェーンであってもよい。
　・前記実施形態において、潤滑剤組成物は、チェーン１１の所謂プレ給油のために適用されている。しかしながら、潤滑剤組成物は、チェーン１１のメンテナンスのために、チェーン１１の使用中、すなわちチェーン浸漬用の槽の外で適用することもできる。この場合であっても、例えばチェーン１１の使用時の発熱や使用環境による加熱に起因するチェーン１１の黒色化を抑制することができる。 The chain to which the lubricant composition is applied is not limited to the roller chain, and may be a bush chain in which the rollers 26 and 27 are omitted, for example.
In the embodiment, the lubricant composition is applied for so-called pre-lubrication of the chain 11. However, the lubricant composition can also be applied for the maintenance of the chain 11 while the chain 11 is in use, i.e. outside the tank for dipping the chain. Even in this case, for example, the blackening of the chain 11 due to heat generation during use of the chain 11 or heating due to the use environment can be suppressed.
　基油、増粘剤、防錆剤、及びその他の成分について、下記に説明するように黒色化試験を行った。
　（基油の黒色化試験）
　表１に示される基油を１５０℃で維持し、黒色化について以下の基準で評価した。 The base oil, thickener, rust inhibitor, and other components were subjected to a blackening test as described below.
(Blackening test of base oil)
The base oil shown in Table 1 was maintained at 150 ° C., and blackening was evaluated according to the following criteria.
　２０００時間経過しても黒色化しなかったもの：最適（Ａ）
　１０００時間後から２０００時間以内に黒色化したもの：好適（Ｂ）
　１００時間後から１０００時間以内に黒色化したもの：やや不適（Ｃ）
　１００時間以内に黒色化したもの：不適（Ｄ）
　評価結果を表１に示す。 What did not turn black after 2000 hours: Optimal (A)
Blackened within 1000 hours after 1000 hours: preferred (B)
Blackened within 1000 hours after 100 hours: Slightly unsuitable (C)
Blackened within 100 hours: unsuitable (D)
The evaluation results are shown in Table 1.
Figure JPOXMLDOC01-appb-T000001
 　高精製鉱油は、リン分及び芳香族分を実質的に含有しない。高精製鉱油中の硫黄分の含有量は、数１０質量ｐｐｍ以下である。合成炭化水素は、硫黄分、リン分、及び芳香族分のいずれも実質的に含有しない。
Figure JPOXMLDOC01-appb-T000001
 Highly refined mineral oil is substantially free of phosphorus and aromatics. The content of sulfur in the highly refined mineral oil is several tens of mass ppm or less. Synthetic hydrocarbons are substantially free of sulfur, phosphorus and aromatics.
　（増粘剤の黒色化試験）
　表２に示される増粘剤について上記の基油と同様に黒色化試験、及びその評価を行った。結果を表２に示す。 (Blackening test of thickener)
About the thickener shown in Table 2, the blackening test and its evaluation were performed similarly to the above base oil. The results are shown in Table 2.
Figure JPOXMLDOC01-appb-T000002
 　（防錆剤の黒色化試験）
　表３に示される防錆剤について上記の基油と同様に黒色化試験、及びその評価を行った。結果を表３に示す。
Figure JPOXMLDOC01-appb-T000002
 (Blackening test of rust inhibitor)
About the rust preventive agent shown in Table 3, the blackening test and the evaluation were performed similarly to the above base oil. The results are shown in Table 3.
Figure JPOXMLDOC01-appb-T000003
 　（その他の成分の黒色化試験）
　表４に示される油性剤及び極圧剤について上記の基油と同様に黒色化試験、及びその評価を行った。結果を表４に示す。
Figure JPOXMLDOC01-appb-T000003
 (Blackening test of other components)
About the oiliness agent and extreme pressure agent which are shown in Table 4, the blackening test and its evaluation were performed similarly to said base oil. The results are shown in Table 4.
Figure JPOXMLDOC01-appb-T000004
 　次に、実施例を説明する。
Figure JPOXMLDOC01-appb-T000004
 Next, examples will be described.
　（実施例１及び２）
　表５に示される組成に従って各原料を混合することで、各実施例の潤滑剤組成物を調製した。表５中の基油は、高精製鉱油（商品名：サンピュアＰ１００、日本サン石油株式会社製）であり、増粘剤は、ポリエチレンワックス（三井ハイワックス２００Ｐ、三井化学株式会社製）である。表５中の防錆剤は、ソルビタン脂肪酸エステルであり、油性剤は脂肪酸エステルである。各実施例の潤滑剤組成物は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下となるように調製された。 (Examples 1 and 2)
The lubricant composition of each Example was prepared by mixing each raw material according to the composition shown in Table 5. The base oil in Table 5 is a highly refined mineral oil (trade name: Sunpure P100, manufactured by Nippon Sun Oil Co., Ltd.), and the thickener is polyethylene wax (Mitsui High Wax 200P, manufactured by Mitsui Chemicals, Inc.). The rust preventive agent in Table 5 is sorbitan fatty acid ester, and the oily agent is fatty acid ester. The lubricant composition of each Example was prepared such that the sulfur content was 100 mass ppm or less, the phosphorus content was 1 mass% or less, and the aromatic content was 1 mass% or less.
　（比較例１及び２）
　表５に示される組成に従って各原料を混合することで、各比較例の潤滑剤組成物を調製した。表５中の極圧剤として、比較例１では硫化オレフィンを用い、比較例２ではジアルキルジチオフォスフェートを用いた。各比較例の潤滑剤組成物に含まれる硫黄分の含有量は、１００質量ｐｐｍを超えていた。 (Comparative Examples 1 and 2)
The lubricant composition of each comparative example was prepared by mixing each raw material according to the composition shown in Table 5. As extreme pressure agents in Table 5, Comparative Example 1 used sulfurized olefins and Comparative Example 2 used dialkyldithiophosphates. The content of sulfur contained in the lubricant composition of each comparative example exceeded 100 mass ppm.
Figure JPOXMLDOC01-appb-T000005
 　得られた各実施例及び比較例の潤滑剤組成物をそれぞれチェーン浸漬用の槽に供給し、１５０℃で１０００時間維持した。その結果、各実施例の潤滑剤組成物では黒色化は確認されなかった。一方、各比較例の潤滑剤組成物では１００時間以内に黒色化が確認された。
Figure JPOXMLDOC01-appb-T000005
 The obtained lubricant compositions of Examples and Comparative Examples were respectively supplied to a chain immersion bath and maintained at 150 ° C. for 1000 hours. As a result, blackening was not confirmed in the lubricant composition of each Example. On the other hand, blackening was confirmed within 100 hours in the lubricant composition of each comparative example.
　次に、チェーン浸漬用の槽内で図１及び図２に示されるチェーン１１を各実施例及び比較例の潤滑剤組成物に浸漬した。１０分経過後、槽内からチェーン１１を取り出した。各実施例の潤滑剤組成物が適用されたチェーン１１は、黒色化のない良好な外観を有していた。各比較例の潤滑剤組成物が適用されたチェーン１１では、黒色化が見られ、外観が不良であった。 Next, the chain 11 shown in FIGS. 1 and 2 was immersed in the lubricant compositions of the examples and comparative examples in a chain immersion bath. After 10 minutes, the chain 11 was taken out from the tank. The chain 11 to which the lubricant composition of each example was applied had a good appearance without blackening. In the chain 11 to which the lubricant composition of each comparative example was applied, blackening was observed and the appearance was poor.
　１１…チェーン、２１…内リンク、２２，２３…内プレート、２２ａ，２２ｂ，２３ａ，２３ｂ…貫通孔、２４，２５…ブシュ、２６，２７…ローラ、３１…外リンク、３２，３３…外プレート、３４，３５…ピン。 DESCRIPTION OF SYMBOLS 11 ... Chain, 21 ... Inner link, 22, 23 ... Inner plate, 22a, 22b, 23a, 23b ... Through-hole, 24, 25 ... Bush, 26, 27 ... Roller, 31 ... Outer link, 32, 33 ... Outer plate , 34, 35 ... pins.

Claims (5)

  1. 　チェーン用潤滑剤組成物であって、
    　基油、増粘剤、及び防錆剤を含有し、
    　硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下であることを特徴とする潤滑剤組成物。     A chain lubricant composition comprising:
    Contains base oil, thickener, and rust inhibitor,
    A lubricant composition having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less.
  2. 　さらに、油性剤を含有し、前記油性剤は、硫黄分が１００質量ｐｐｍ以下、リン分が１質量％以下、かつ芳香族分が１質量％以下の化合物からなる請求項１に記載の潤滑剤組成物。 The lubricant according to claim 1, further comprising an oily agent, wherein the oily agent comprises a compound having a sulfur content of 100 mass ppm or less, a phosphorus content of 1 mass% or less, and an aromatic content of 1 mass% or less. Composition.
  3. 　前記油性剤は、脂肪酸エステル及びラノリン脂肪酸アルコールエステルから選ばれる少なくとも一種を含む請求項２に記載の潤滑剤組成物。 The lubricant composition according to claim 2, wherein the oily agent contains at least one selected from fatty acid esters and lanolin fatty acid alcohol esters.
  4. 　チェーン浸漬用の槽内で用いられる請求項１から請求項３のいずれか一項に記載の潤滑剤組成物。 The lubricant composition according to any one of claims 1 to 3, wherein the lubricant composition is used in a chain immersion bath.
  5. 　請求項１から請求項４のいずれか一項に記載の潤滑剤組成物を適用したことを特徴とするチェーン。 A chain characterized by applying the lubricant composition according to any one of claims 1 to 4.
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