WO2011059097A1 - Flame retardant grease composition - Google Patents

Flame retardant grease composition Download PDF

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Publication number
WO2011059097A1
WO2011059097A1 PCT/JP2010/070389 JP2010070389W WO2011059097A1 WO 2011059097 A1 WO2011059097 A1 WO 2011059097A1 JP 2010070389 W JP2010070389 W JP 2010070389W WO 2011059097 A1 WO2011059097 A1 WO 2011059097A1
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Prior art keywords
grease composition
flame retardant
load
bearing
grease
Prior art date
Application number
PCT/JP2010/070389
Other languages
French (fr)
Japanese (ja)
Inventor
隆史 我妻
理 齊田
洋介 遠藤
Original Assignee
協同油脂株式会社
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Publication of WO2011059097A1 publication Critical patent/WO2011059097A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/06—Mixtures of thickeners and additives
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
    • C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/022—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of hydrocarbons, e.g. olefines
    • 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
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • 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
    • C10N2020/02—Viscosity; 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
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/02—Bearings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Definitions

  • the present invention relates to a flame retardant grease composition used for bearings and gears of steelmaking facilities and the like. More specifically, the present invention relates to a flame retardant grease composition that can be used in places where high-temperature scales and the like are scattered and the grease is ignited to cause a fire.
  • Grease is often used to lubricate bearings and gears in plastic processing equipment such as steelmaking and forging equipment.
  • plastic processing equipment such as steelmaking and forging equipment.
  • these facilities are exposed to high temperatures, used grease drips and accumulates under the facilities, and when the accumulated grease is exposed to high temperatures or the scales scatter, the grease ignites, The resulting fire is regarded as a problem.
  • the grease that has dropped is manually removed, but it is difficult to remove the grease that has accumulated in a narrow place where it is difficult for a person to enter. Even if a fire breaks out, it is easy to extinguish it if it is detected immediately.
  • there is not much manpower in an automated facility and a fire is not always detected immediately.
  • Patent Documents 1 and 2 disclose greases to which powders effective for flame retardancy are added. However, when used in a centralized greasing system, the added powders are disclosed. The body may cause plugging in the piping and distribution valve.
  • Patent Document 3 discloses a flame retardant grease composition in which a water-absorbing polymer and water are contained in grease. However, if the grease is left in a high temperature environment exceeding 100 ° C. for a long time, the water is difficult to evaporate. The flammability may be lost.
  • Patent Document 4 discloses a self-extinguishing grease composition having a self-extinguishing time of 5 minutes or less in an ointment can combustion test.
  • bearings and gears used in steelmaking facilities are usually operated under conditions of high load and impact load, not only flame resistance and self-extinguishing properties, but also to prevent damage to the bearings and gears, etc.
  • the product is also required to have excellent load resistance.
  • Patent Document 5 discloses a grease composition with excellent load bearing capability and excellent self-extinguishing properties, which has greatly contributed to the reduction of fires in steelmaking facilities and the like. The demand for self-extinguishing grease is difficult.
  • An object of the present invention is to provide a flame retardant grease composition having an ignition temperature higher than that of a conventional grease composition and having improved load resistance and self-extinguishing properties in order to reduce the risk of fire in an iron manufacturing facility or the like. Is to provide.
  • Another object of the present invention is to provide a bearing or gear in which the flame retardant grease composition is enclosed.
  • the present invention provides the following flame retardant grease composition and bearing or gear.
  • at least one thickener selected from the group consisting of metal soap thickeners and urea thickeners;
  • a base oil a mineral oil having a kinematic viscosity at 40 ° C. of 300 to 1000 mm 2 / s, Contains a sulfur-based load-bearing additive that does not contain metal and phosphorus,
  • the flame retardant grease composition according to the above (1) or (2) comprising 1 to 20% by mass of sulfurized olefin based on the total mass of the composition.
  • the bearing or gear according to the above (5) which is used for iron making equipment.
  • the flame-retardant grease composition of the present invention has a higher ignition temperature than conventional grease compositions, and has improved load resistance and self-extinguishing properties. Can withstand operation under impact load conditions.
  • the thickener used in the present invention is at least one selected from the group consisting of a metal soap thickener and a urea thickener.
  • the metal soap thickener include alkali metal soap (for example, lithium soap and sodium soap), alkaline earth metal soap (for example, calcium soap), composite alkali metal soap (for example, composite lithium soap), and composite alkaline earth.
  • a metal soap for example, complex calcium soap
  • urea thickeners include aromatic urea compounds, aliphatic urea compounds, alicyclic urea compounds, and combinations of two or more thereof.
  • Metal soap thickeners are preferred, and lithium soap is particularly preferred.
  • the content of the thickener in the composition of the present invention is only required to obtain a desired consistency, and is, for example, preferably 1 to 30% by mass, more preferably 1 to 15% based on the entire grease composition. is there.
  • the base oil used in the present invention is a mineral oil having a kinematic viscosity at 40 ° C. of 300 to 1000 mm 2 / s, preferably 420 to 1000 mm 2 / s, more preferably 480 to 1000 mm 2 / s.
  • Mineral oil having a kinematic viscosity at 40 ° C. of less than 300 mm 2 / s may have a burning time of more than 5 minutes in an ointment can combustion test described below, resulting in a decrease in self-extinguishing properties.
  • a vacuum distillation residue oil or a mineral oil having a molecular weight of 1000 to 3000 in terms of polystyrene can be used.
  • the content of the base oil in the composition of the present invention is preferably 50 to 99% by mass, more preferably 80 to 99%.
  • the load-bearing additive used in the present invention is a sulfur-based load-bearing additive that does not contain metal and phosphorus, and essentially includes a sulfurized olefin represented by the following general formula.
  • R 1 S- (S x -R 2 -S y ) n -R 1 (Wherein x is 0 or an integer from 1 to 2, y is an integer from 1 to 3, n is an integer from 1 to 10, and R 1 and R 2 are each monovalent or divalent having 4 to 10 carbon atoms. Represents an alkyl group or an alkenyl group.)
  • the sulfurized olefin may be synthesized by a known method or a commercially available product may be used.
  • the load-bearing additive may further contain a sulfur-based load-bearing additive that does not contain phosphorus and metal such as sulfurized fat and oil and polysulfide, in addition to sulfurized olefin.
  • sulfurized fats and oils include DAILUBE S-310KD (Dainippon Ink Chemical Co., Ltd.).
  • polysulfides include TPS-20 (Arkema Co., Ltd.).
  • the content of sulfurized olefin in the composition of the present invention is preferably 0.8 to 20% by mass, more preferably 1 to 10% by mass. It is preferable to include a sulfurized olefin in such a range because the flame retardancy and load resistance are good.
  • the total content of the load-bearing additives in the composition of the present invention is preferably 1.0 to 20% by mass, more preferably Is 1.2 to 10% by mass. It is preferable to include a load-bearing additive that does not contain metal and phosphorus in such a range because the flame retardancy and load-bearing property are good.
  • additives usually used in the grease composition for example, a rust inhibitor, an antioxidant, an oily agent and the like can be added as necessary.
  • the total amount of these components used is usually about 0.5 to 10% by mass, preferably 1 to 5% by mass.
  • rust inhibitor By including a rust inhibitor, a grease composition that does not rust even when water is applied can be provided.
  • a rust inhibitor for example, carboxylic acid and its derivatives or sulfonates can be preferably used.
  • Antioxidants are known as oxidative degradation inhibitors for grease.
  • the antioxidant that can be used in the present invention include phenol-based antioxidants and amine-based antioxidants.
  • the phenolic antioxidant 2,6-di-tert-butyl-p-cresol (BHT), 2,2′-methylenebis (4-methyl-6-tertiarybutylphenol), 4,4′-butylidenebis ( 3-methyl-6-tertiarybutylphenol), 2,6-ditertiarybutylphenol, 2,4-dimethyl-6-tertiarybutylphenol, tertiary butylhydroxyanisole (BHA), 4,4'-butylidenebis (3-Methyl-6-tertiary butylphenol), 4,4'-methylenebis (2,3-di-tertiarybutylphenol), 4,4'-thiobis (3-methyl-6-tertiarybutylphenol) It is done.
  • BHT 2,6-di-tert-butyl-p-
  • amine antioxidant examples include Nn-butyl-p-aminophenol, 4,4′-tetramethyl-di-aminodiphenylmethane, ⁇ -naphthylamine, N-phenyl- ⁇ -naphthylamine, phenothiazine and the like.
  • oily agent can be included.
  • oily agents that can be used in the present invention include higher fatty acids, higher alcohols, fats and esters, and the like.
  • the consistency of the composition of the present invention can be measured in accordance with JIS K 2220, and is preferably 220 to 430, more preferably 265 to 430, because it is easy to pump grease in centralized lubrication of mechanical equipment. .
  • the self-extinguishing grease composition of the present invention can be manufactured according to a normal manufacturing method of the grease composition. For example, when metal soap is used as a thickener, a saponification method in which a fat or fatty acid or the like is reacted with an alkali in a base oil and the resulting soap is heated and dispersed in the base oil, or based on a metal soap that has already been synthesized. It can be produced using a mixing method in which heat is dispersed in oil.
  • the thickener When the thickener is a urea compound, it can be produced by a method in which the corresponding amine and isocyanate are reacted in the base oil and then heated and dispersed. Load bearing additives can be added during the manufacturing process.
  • the flame-retardant grease composition of the present invention is suitable for use as a concentrated grease supply, and particularly suitable for use as a grease composition for steelmaking facilities.
  • the load resistance of the flame retardant grease composition of the present invention was evaluated by ASTM D2596. 3. Comprehensive Judgment Pass ( ⁇ ) if all of the following are met: Flame retardant evaluation shall not be ignited at 900 °C in grease flammability test; The self-extinguishing evaluation shall be self-extinguishing within 300 seconds; and the load resistance evaluation shall be ASTM D2596 with a fusion load of 2452N or more.
  • Li soap Lithium hydroxystearate
  • Aliphatic urea Urea compound sulfurized olefin obtained by addition reaction of 4,4'-diphenylmethane diisocyanate and octylamine A: ANGLAMOL33 (Nippon Lubrizol Corporation)
  • Sulfurized olefin B NA-LUBE EP-5120 (KING INDUSTRIES)
  • Sulfurized fats and oils DAILUBE S-310KD (Dainippon Ink Chemical Co., Ltd.)
  • compositions of Comparative Examples 1 and 2 are the same as the compositions of Examples 2 and 5 except that medium viscosity mineral oil was used instead of high viscosity mineral oil, respectively, but the self-extinguishing properties were poor. (Load resistance is equivalent or better) Since the composition of Comparative Example 3 does not contain sulfurized olefin, it is inferior in flame retardancy and load resistance.
  • the composition of Comparative Example 4 is the same as the composition of Example 2 except that ZnDTC was used in place of the sulfurized olefin A as a load-bearing additive, but it is inferior in flame retardancy. (Load resistance is equivalent or better)

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

Abstract

A flame retardant grease composition which comprises at least one thickening agent selected from the group consisting of metal soap-based thickening agents and urea-based thickening agents, a base oil consisting of a mineral oil that exhibits a kinematic viscosity of 300 to 1000mm2/s at 40°C, and a sulfur-based load-carrying additive that contains neither metal nor phosphorus, said load-carrying additive containing a sulfurized olefin as the essential component. The flame retardant grease composition has a higher ignition temperature than that of a conventional grease composition, and exhibits improved load-carrying properties and self -extinguishing properties, thus reducing the risk of fire in ironmaking facilities or the like.

Description

難燃性グリース組成物Flame retardant grease composition
　本発明は製鉄設備等の軸受や歯車に使用される難燃性グリース組成物に関する。詳しくは、高温のスケール等が飛散して、グリースに着火し、火災が懸念される箇所に使用可能な難燃性グリース組成物に関する。 The present invention relates to a flame retardant grease composition used for bearings and gears of steelmaking facilities and the like. More specifically, the present invention relates to a flame retardant grease composition that can be used in places where high-temperature scales and the like are scattered and the grease is ignited to cause a fire.
　製鉄設備、鍛造設備などの塑性加工設備の軸受や歯車の潤滑にはグリースが多用されている。しかし、これらの設備は高温に曝されるため、使用済みのグリースが設備の下に垂れ落ちて堆積し、堆積したグリースが高温に曝されたり、スケールが飛散した場合にグリースに着火し、それに起因する火災が問題視されている。このような火災が発生しないよう、通常、垂れ落ちたグリースを人手で除去するが、人が入り難いような狭い場所に垂れ落ちて堆積したグリースの除去は困難である。万一火災が発生したとしても、火災が直ちに発見されれば消火は容易であるが、自動化が進んだ設備では人手が少なく、必ずしも火災が直ちに発見されるとは限らない。火災の発見が遅れると、消火が困難となり、あるいは不可能となることも起こり得る。従って、難燃性及び自己消火性に優れた潤滑グリース組成物が求められている。
　難燃性に優れたグリース組成物として、特許文献１および特許文献２には難燃性に有効な粉体を添加したグリースが開示されているが、集中給脂方式で使用すると、添加した粉体により配管及び分配弁内でプラッギングが発生する恐れがある。
　特許文献３には、グリースに吸水性ポリマーと水を含ませた難燃性グリース組成物が開示されているが、１００℃を越す高温環境に長時間放置されると、水が蒸発して難燃性が消失してしまう恐れがある。
　特許文献４には軟膏缶燃焼試験で自己消火時間が５分以内の自己消火性グリース組成物が開示されている。
　他方、製鉄設備に使用される軸受や歯車は通常高荷重、衝撃荷重の条件下で運転されるため、難燃性及び自己消火性だけでなく、軸受や歯車等の損傷を防ぐために、グリース組成物には優れた耐荷重性も同時に求められている。
　特許文献５には耐荷重性が優れ、かつ自己消火性に優れるグリース組成物が開示されており、製鉄設備等の火災の減少に大きく貢献したが、更なる安全性の確保のため、より着火し難い自己消火性グリースの要求は後を絶たない。 Grease is often used to lubricate bearings and gears in plastic processing equipment such as steelmaking and forging equipment. However, because these facilities are exposed to high temperatures, used grease drips and accumulates under the facilities, and when the accumulated grease is exposed to high temperatures or the scales scatter, the grease ignites, The resulting fire is regarded as a problem. In order to prevent the occurrence of such a fire, usually, the grease that has dropped is manually removed, but it is difficult to remove the grease that has accumulated in a narrow place where it is difficult for a person to enter. Even if a fire breaks out, it is easy to extinguish it if it is detected immediately. However, there is not much manpower in an automated facility, and a fire is not always detected immediately. If the discovery of a fire is delayed, extinguishing can be difficult or impossible. Accordingly, there is a need for a lubricating grease composition that is excellent in flame retardancy and self-extinguishing properties.
As grease compositions having excellent flame retardancy, Patent Documents 1 and 2 disclose greases to which powders effective for flame retardancy are added. However, when used in a centralized greasing system, the added powders are disclosed. The body may cause plugging in the piping and distribution valve.
Patent Document 3 discloses a flame retardant grease composition in which a water-absorbing polymer and water are contained in grease. However, if the grease is left in a high temperature environment exceeding 100 ° C. for a long time, the water is difficult to evaporate. The flammability may be lost.
Patent Document 4 discloses a self-extinguishing grease composition having a self-extinguishing time of 5 minutes or less in an ointment can combustion test.
On the other hand, since bearings and gears used in steelmaking facilities are usually operated under conditions of high load and impact load, not only flame resistance and self-extinguishing properties, but also to prevent damage to the bearings and gears, etc. The product is also required to have excellent load resistance.
Patent Document 5 discloses a grease composition with excellent load bearing capability and excellent self-extinguishing properties, which has greatly contributed to the reduction of fires in steelmaking facilities and the like. The demand for self-extinguishing grease is difficult.
特許第２９９９５５３号Japanese Patent No. 2999953 特開平４－２０２４９７号公報JP-A-4-202497 特開２００２－１４６３７６号公報JP 2002-146376 A 特許第４２６８７８９号Japanese Patent No. 4268789 特開２００６－２２５５９号公報JP 2006-22559 A
　本発明の目的は、製鉄設備等の火災の危険性を下げるため、従来のグリース組成物よりも着火温度を高くし、且つ耐荷重性および自己消火性を向上させた難燃性グリース組成物を提供することである。
　本発明の他の目的は、上記難燃性グリース組成物を封入した軸受又は歯車を提供することである。 An object of the present invention is to provide a flame retardant grease composition having an ignition temperature higher than that of a conventional grease composition and having improved load resistance and self-extinguishing properties in order to reduce the risk of fire in an iron manufacturing facility or the like. Is to provide.
Another object of the present invention is to provide a bearing or gear in which the flame retardant grease composition is enclosed.
　本発明は、以下の難燃性グリース組成物及び軸受又は歯車を提供する。
　（１）金属石けん系増ちょう剤及びウレア系増ちょう剤からなる群から選ばれる少なくとも１種の増ちょう剤と、
　基油として、４０℃における動粘度が３００～１０００ｍｍ2／ｓの鉱物油と、
　金属とリンとを含まない硫黄系耐荷重添加剤とを含有し、
　前記耐荷重添加剤として少なくとも硫化オレフィンを含有する難燃性グリース組成物。
　（２）さらに、硫化油脂及びポリスルフィドからなる群から選ばれる少なくとも１種の耐荷重添加剤を含有する上記（１）記載の難燃性グリース組成物。
　（３）組成物の全質量を基準として、硫化オレフィンを１～２０質量％含む上記（１）又は（２）記載の難燃性グリース組成物。
　（４）増ちょう剤がリチウム石けんである上記（１）～（３）のいずれか１項記載の難燃性グリース組成物。
　（５）上記（１）～（４）のいずれか１項記載の難燃性グリース組成物を封入してなる軸受又は歯車。
　（６）製鉄設備用である上記（５）記載の軸受又は歯車。 The present invention provides the following flame retardant grease composition and bearing or gear.
(1) at least one thickener selected from the group consisting of metal soap thickeners and urea thickeners;
As a base oil, a mineral oil having a kinematic viscosity at 40 ° C. of 300 to 1000 mm 2 / s,
Contains a sulfur-based load-bearing additive that does not contain metal and phosphorus,
A flame retardant grease composition containing at least a sulfurized olefin as the load bearing additive.
(2) The flame retardant grease composition according to (1), further comprising at least one load-bearing additive selected from the group consisting of sulfurized fats and oils and polysulfides.
(3) The flame retardant grease composition according to the above (1) or (2), comprising 1 to 20% by mass of sulfurized olefin based on the total mass of the composition.
(4) The flame retardant grease composition according to any one of the above (1) to (3), wherein the thickener is lithium soap.
(5) A bearing or gear formed by enclosing the flame retardant grease composition according to any one of (1) to (4) above.
(6) The bearing or gear according to the above (5), which is used for iron making equipment.
　本発明の難燃性グリース組成物は、従来のグリース組成物よりも着火温度が高く、且つ耐荷重性および自己消火性も向上しており、製鉄設備等の火災の危険性が低く、高荷重、衝撃荷重条件下の運転にも耐えられる。 The flame-retardant grease composition of the present invention has a higher ignition temperature than conventional grease compositions, and has improved load resistance and self-extinguishing properties. Can withstand operation under impact load conditions.
〔増ちょう剤〕
　本発明で使用する増ちょう剤は、金属石けん系増ちょう剤及びウレア系増ちょう剤からなる群から選ばれる少なくとも１種である。
　金属石けん系増ちょう剤としては、アルカリ金属石けん（例えば、リチウム石けん、ナトリウム石けん）、アルカリ土類金属石けん（例えば、カルシウム石けん）、複合アルカリ金属石けん（例えば、複合リチウム石けん）、複合アルカリ土類金属石けん（例えば、複合カルシウム石けん）、これらの２種以上の組み合わせが挙げられる。
　ウレア系増ちょう剤としては、芳香族ウレア化合物、脂肪族ウレア化合物、脂環式ウレア化合物、これらの２種以上の組み合わせが挙げられる。
　金属石けん系増ちょう剤が好ましく、特にリチウム石けんが好ましい。
　本発明の組成物中の増ちょう剤の含有量は、所望のちょう度が得られれば良く、例えば、グリース組成物全体に対して好ましくは１～３０質量％、さらに好ましくは１～１５％である。 [Thickener]
The thickener used in the present invention is at least one selected from the group consisting of a metal soap thickener and a urea thickener.
Examples of the metal soap thickener include alkali metal soap (for example, lithium soap and sodium soap), alkaline earth metal soap (for example, calcium soap), composite alkali metal soap (for example, composite lithium soap), and composite alkaline earth. A metal soap (for example, complex calcium soap) and a combination of two or more of these may be mentioned.
Examples of urea thickeners include aromatic urea compounds, aliphatic urea compounds, alicyclic urea compounds, and combinations of two or more thereof.
Metal soap thickeners are preferred, and lithium soap is particularly preferred.
The content of the thickener in the composition of the present invention is only required to obtain a desired consistency, and is, for example, preferably 1 to 30% by mass, more preferably 1 to 15% based on the entire grease composition. is there.
〔基油〕
　本発明で使用する基油は、４０℃における動粘度が３００～１０００ｍｍ2／ｓ、好ましくは４２０～１０００ｍｍ2／ｓ、さらに好ましくは４８０～１０００ｍｍ2／ｓの鉱物油である。４０℃における動粘度が３００ｍｍ2／ｓ未満の鉱物油は、後述する軟膏缶燃焼試験で燃焼時間が５分を超えてしまい、自己消火性が低下してしまうことがある。
　鉱物油としては、例えば、減圧蒸留残渣油やポリスチレン換算で１０００から３０００の分子量を示す鉱物油を使用することができる。４０℃における動粘度が３００ｍｍ2／ｓ以上であっても、エステル系やフェニルエーテル系といった合成油の場合、コストが多くかかり、製鉄設備用としては適さない。
　本発明の組成物中の基油の含有量は、好ましくは５０～９９質量％、さらに好ましくは８０～９９％である。 [Base oil]
The base oil used in the present invention is a mineral oil having a kinematic viscosity at 40 ° C. of 300 to 1000 mm 2 / s, preferably 420 to 1000 mm 2 / s, more preferably 480 to 1000 mm 2 / s. Mineral oil having a kinematic viscosity at 40 ° C. of less than 300 mm 2 / s may have a burning time of more than 5 minutes in an ointment can combustion test described below, resulting in a decrease in self-extinguishing properties.
As the mineral oil, for example, a vacuum distillation residue oil or a mineral oil having a molecular weight of 1000 to 3000 in terms of polystyrene can be used. Even if the kinematic viscosity at 40 ° C. is 300 mm 2 / s or more, in the case of synthetic oils such as ester-based and phenyl ether-based ones, the cost is high and it is not suitable for use in steelmaking facilities.
The content of the base oil in the composition of the present invention is preferably 50 to 99% by mass, more preferably 80 to 99%.
〔耐荷重添加剤〕
　本発明で使用する耐荷重添加剤は、金属とリンとを含まない硫黄系耐荷重添加剤であり、下記一般式で示される硫化オレフィンを必須とする。
Ｒ1Ｓ－（Ｓx－Ｒ2－Ｓy）n－Ｒ1
（式中ｘは０または１から２の整数、ｙは１～３の整数、ｎは１～１０の整数を表し、Ｒ1およびＲ2はそれぞれ炭素原子数４～１０の一価または二価のアルキル基またはアルケニル基を表す。）
硫化オレフィンは、公知の方法により合成しても市販品を用いても良い。市販品として、ＡＮＧＬＡＭＯＬ３３（日本ルブリゾール（株））、ＮＡ－ＬＵＢＥ　ＥＰ－５１２０（ＫＩＮＧ ＩＮＤＵＳＴＲＩＥＳ社）、ＮＡ－ＬＵＢＥ　ＥＰ－５１３０ＬＣ（ＫＩＮＧ ＩＮＤＵＳＴＲＩＥＳ社）等があげられる。
　上記耐荷重添加剤としては、硫化オレフィンに加えて、硫化油脂及びポリスルフィド等の金属とリンとを含まない硫黄系耐荷重添加剤をさらに含んでいてもよい。市販の硫化油脂としては、ＤＡＩＬＵＢＥ　Ｓ－３１０ＫＤ（大日本インキ化学工業（株））等があげられる。市販のポリスルフィドとしては、ＴＰＳ－２０（アルケマ（株））等があげられる。
　本発明の組成物中の硫化オレフィンの含有量は、好ましくは０．８～２０質量％、さらに好ましくは１～１０質量％である。このような範囲で硫化オレフィンを含むことにより、難燃性、耐荷重性が良好であるので好ましい。
　更なる金属とリンとを含まない硫黄系耐荷重添加剤を含む場合、本発明の組成物中の前記耐荷重添加剤の含有量の合計は、好ましくは１．０～２０質量％、さらに好ましくは１．２～１０質量％である。このような範囲で金属とリンとを含まない耐荷重添加剤を含むことにより、難燃性、耐荷重性が良好であるので好ましい。
〔任意成分〕
　本発明の難燃性グリース組成物には、グリース組成物に通常用いられる添加剤、例えば、錆止め剤、酸化防止剤、油性剤などを必要に応じて添加することができる。これらの成分の使用量の合計は、通常０．５～１０質量％程度、好ましくは１～５質量％である。 (Load bearing additive)
The load-bearing additive used in the present invention is a sulfur-based load-bearing additive that does not contain metal and phosphorus, and essentially includes a sulfurized olefin represented by the following general formula.
R 1 S- (S x -R 2 -S y ) n -R 1
(Wherein x is 0 or an integer from 1 to 2, y is an integer from 1 to 3, n is an integer from 1 to 10, and R 1 and R 2 are each monovalent or divalent having 4 to 10 carbon atoms. Represents an alkyl group or an alkenyl group.)
The sulfurized olefin may be synthesized by a known method or a commercially available product may be used. Examples of commercially available products include ANGLAMOL33 (Nippon Lubrizol Corp.), NA-LUBE EP-5120 (KING INDUSTRIES), NA-LUBE EP-5130LC (KING INDUSTRIES) and the like.
The load-bearing additive may further contain a sulfur-based load-bearing additive that does not contain phosphorus and metal such as sulfurized fat and oil and polysulfide, in addition to sulfurized olefin. Examples of commercially available sulfurized fats and oils include DAILUBE S-310KD (Dainippon Ink Chemical Co., Ltd.). Examples of commercially available polysulfides include TPS-20 (Arkema Co., Ltd.).
The content of sulfurized olefin in the composition of the present invention is preferably 0.8 to 20% by mass, more preferably 1 to 10% by mass. It is preferable to include a sulfurized olefin in such a range because the flame retardancy and load resistance are good.
When a sulfur-based load-bearing additive that does not contain further metal and phosphorus is included, the total content of the load-bearing additives in the composition of the present invention is preferably 1.0 to 20% by mass, more preferably Is 1.2 to 10% by mass. It is preferable to include a load-bearing additive that does not contain metal and phosphorus in such a range because the flame retardancy and load-bearing property are good.
[Optional ingredients]
In the flame-retardant grease composition of the present invention, additives usually used in the grease composition, for example, a rust inhibitor, an antioxidant, an oily agent and the like can be added as necessary. The total amount of these components used is usually about 0.5 to 10% by mass, preferably 1 to 5% by mass.
〔錆止め剤〕
　錆止め剤を含むことにより、水がかかる場合でも発錆しないグリース組成物を提供することができる。錆止め剤としては、例えばカルボン酸及びその誘導体やスルフォン酸塩などを好適に使用することができる。 (Rust inhibitor)
By including a rust inhibitor, a grease composition that does not rust even when water is applied can be provided. As the rust inhibitor, for example, carboxylic acid and its derivatives or sulfonates can be preferably used.
〔酸化防止剤〕
　酸化防止剤は、グリースの酸化劣化抑制剤として知られている。本発明において使用可能な酸化防止剤としては、フェノール系酸化防止剤、アミン系酸化防止剤等が挙げられる。
　フェノール系酸化防止剤としては、２,６-ジ-ターシャリーブチル-ｐ-クレゾール（ＢＨＴ）、２,２’-メチレンビス(４-メチル-６-ターシャリーブチルフェノール)、４,４’-ブチリデンビス(３-メチル-６-ターシャリーブチルフェノール)、２,６-ジ-ターシャリ
ーブチル-フェノール、２,４-ジメチル-６-ターシャリーブチルフェノール、ターシャリーブチルヒドロキシアニソール（ＢＨＡ）、４,４’-ブチリデンビス(３-メチル-６-ターシャリーブチルフェノール)、４,４’-メチレンビス(２,３-ジ-ターシャリーブチルフェノール)、４,４’-チオビス(３-メチル-６-ターシャリーブチルフェノール)等があげられる。
　アミン系酸化防止剤としては、Ｎ-ｎ-ブチル-ｐ-アミノフェノール、４,４’-テトラメチル-ジ-アミノジフェニルメタン、α-ナフチルアミン、Ｎ-フェニル-α-ナフチルアミン、フェノチアジン等が挙げられる。 〔Antioxidant〕
Antioxidants are known as oxidative degradation inhibitors for grease. Examples of the antioxidant that can be used in the present invention include phenol-based antioxidants and amine-based antioxidants.
As the phenolic antioxidant, 2,6-di-tert-butyl-p-cresol (BHT), 2,2′-methylenebis (4-methyl-6-tertiarybutylphenol), 4,4′-butylidenebis ( 3-methyl-6-tertiarybutylphenol), 2,6-ditertiarybutylphenol, 2,4-dimethyl-6-tertiarybutylphenol, tertiary butylhydroxyanisole (BHA), 4,4'-butylidenebis (3-Methyl-6-tertiary butylphenol), 4,4'-methylenebis (2,3-di-tertiarybutylphenol), 4,4'-thiobis (3-methyl-6-tertiarybutylphenol) It is done.
Examples of the amine antioxidant include Nn-butyl-p-aminophenol, 4,4′-tetramethyl-di-aminodiphenylmethane, α-naphthylamine, N-phenyl-α-naphthylamine, phenothiazine and the like.
〔油性剤〕
　さらに油性剤を含むことができる。本発明に使用可能な油性剤としては、高級脂肪酸、高級アルコール、油脂、エステル等があげられる。 [Oil-based agent]
Further, an oily agent can be included. Examples of oily agents that can be used in the present invention include higher fatty acids, higher alcohols, fats and esters, and the like.
　本発明の組成物のちょう度は、JIS K 2220に従って測定することができ、好ましくは２２０～４３０、より好ましくは２６５～４３０であると、機械設備の集中給脂ではグリースの圧送が容易なので好ましい。
　本発明の自己消火性グリース組成物は、グリース組成物の通常の製造方法に従って製造できる。例えば、増ちょう剤として金属石けんを使用する場合、基油中で油脂又は脂肪酸等とアルカリを反応させ、生成した石けんを基油中に加熱分散させるケン化法、既に合成された金属石けんを基油中に加熱分散させる混合法などを用いて製造することができる。
増ちょう剤がウレア化合物の場合、基油中で相当するアミンとイソシアネートを反応させ、その後加熱分散させる方法を用いて製造することができる。耐荷重添加剤は、製造工程中に添加することができる。
　本発明の難燃性グリース組成物は、集中給脂用として使用するのに好適であり、特に製鉄設備用グリース組成物として使用するのに好適である。 The consistency of the composition of the present invention can be measured in accordance with JIS K 2220, and is preferably 220 to 430, more preferably 265 to 430, because it is easy to pump grease in centralized lubrication of mechanical equipment. .
The self-extinguishing grease composition of the present invention can be manufactured according to a normal manufacturing method of the grease composition. For example, when metal soap is used as a thickener, a saponification method in which a fat or fatty acid or the like is reacted with an alkali in a base oil and the resulting soap is heated and dispersed in the base oil, or based on a metal soap that has already been synthesized. It can be produced using a mixing method in which heat is dispersed in oil.
When the thickener is a urea compound, it can be produced by a method in which the corresponding amine and isocyanate are reacted in the base oil and then heated and dispersed. Load bearing additives can be added during the manufacturing process.
The flame-retardant grease composition of the present invention is suitable for use as a concentrated grease supply, and particularly suitable for use as a grease composition for steelmaking facilities.
　表１及び表２に示す増ちょう剤、基油、耐荷重添加剤を、各表に示す量（質量％）で使用して実施例及び比較例のグリース組成物を製造し、燃焼性及び耐荷重性を評価した。なお、基油の４０℃における動粘度は、JIS K 2283に準じて測定した。
１．難燃性の評価
　実施例及び比較例のグリース組成物の難燃性（着火温度及び自己消火性）はグリース燃焼性試験により評価した。
　燃焼性は、グリース組成物２０ｇを内径６５ｍｍ、深さ１３ｍｍの筒型の金属容器（軟膏缶）に入れ、これに各温度（９００、９５０℃）に加熱した鋼球（直径１９．０５mm）を入れ、着火の有無、及び着火した場合の燃焼が終わるまでの時間を計測した。燃焼時間が３００秒を越えた場合は自己消火性なしと判断して消火し、試験を中止した。 Using the thickeners, base oils, and load-bearing additives shown in Tables 1 and 2 in the amounts (mass%) shown in the respective tables, the grease compositions of Examples and Comparative Examples were produced, and the flammability and resistance The loadability was evaluated. The kinematic viscosity at 40 ° C. of the base oil was measured according to JIS K 2283.
1. Evaluation of flame retardancy The flame retardancy (ignition temperature and self-extinguishing property) of the grease compositions of Examples and Comparative Examples was evaluated by a grease flammability test.
In terms of combustibility, 20 g of the grease composition was placed in a cylindrical metal container (ointment can) having an inner diameter of 65 mm and a depth of 13 mm, and a steel ball (diameter 19.05 mm) heated to each temperature (900, 950 ° C.) was added thereto. It was turned on, the presence or absence of ignition, and the time until the end of combustion when ignited were measured. When the burning time exceeded 300 seconds, it was judged that there was no self-extinguishing property, the fire was extinguished, and the test was stopped.
２．耐荷重性の評価
　本発明の難燃性グリース組成物の耐荷重性はASTM　D２５９６で評価した。
３．総合判定
　次の内容を全て満たす場合に合格（○）とした：
　　難燃性評価はグリース燃焼性試験において、900℃で着火しないこと；
　　自己消火性評価は300秒以内に自己消火すること；及び
　　耐荷重性評価はASTM D２５９６で融着荷重が2452N以上であること。 2. Evaluation of load resistance The load resistance of the flame retardant grease composition of the present invention was evaluated by ASTM D2596.
3. Comprehensive Judgment Pass (○) if all of the following are met:
Flame retardant evaluation shall not be ignited at 900 ℃ in grease flammability test;
The self-extinguishing evaluation shall be self-extinguishing within 300 seconds; and the load resistance evaluation shall be ASTM D2596 with a fusion load of 2452N or more.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
Li石けん：ヒドロキシステアリン酸リチウム
脂肪族ウレア：４,４’－ジフェニルメタンジイソシアネートとオクチルアミンを付加反応させて得られるウレア化合物
硫化オレフィンＡ：ＡＮＧＬＡＭＯＬ３３（日本ルブリゾール（株））
硫化オレフィンＢ：ＮＡ－ＬＵＢＥ　ＥＰ－５１２０（ＫＩＮＧ ＩＮＤＵＳＴＲＩＥＳ社）
硫化油脂：ＤＡＩＬＵＢＥ　Ｓ－３１０ＫＤ（大日本インキ化学工業（株）） Li soap: Lithium hydroxystearate Aliphatic urea: Urea compound sulfurized olefin obtained by addition reaction of 4,4'-diphenylmethane diisocyanate and octylamine A: ANGLAMOL33 (Nippon Lubrizol Corporation)
Sulfurized olefin B: NA-LUBE EP-5120 (KING INDUSTRIES)
Sulfurized fats and oils: DAILUBE S-310KD (Dainippon Ink Chemical Co., Ltd.)
　比較例１及び２の組成物は、それぞれ、高粘度鉱物油に代えて中粘度鉱物油を使用したこと以外は実施例２及び５の組成物と同じであるが、自己消火性に劣る。（耐荷重性は同等以上）
　比較例３の組成物は、硫化オレフィンを含まないため、難燃性、耐荷重性に劣る。
　比較例４の組成物は、耐荷重添加剤として、硫化オレフィンＡに代えてＺｎＤＴＣを使用したこと以外は実施例２の組成物と同じであるが、難燃性に劣る。（耐荷重性は同等以上） The compositions of Comparative Examples 1 and 2 are the same as the compositions of Examples 2 and 5 except that medium viscosity mineral oil was used instead of high viscosity mineral oil, respectively, but the self-extinguishing properties were poor. (Load resistance is equivalent or better)
Since the composition of Comparative Example 3 does not contain sulfurized olefin, it is inferior in flame retardancy and load resistance.
The composition of Comparative Example 4 is the same as the composition of Example 2 except that ZnDTC was used in place of the sulfurized olefin A as a load-bearing additive, but it is inferior in flame retardancy. (Load resistance is equivalent or better)

Claims (6)

  1. 　金属石けん系増ちょう剤及びウレア系増ちょう剤からなる群から選ばれる少なくとも１種の増ちょう剤と、
    　基油として、４０℃における動粘度が３００～１０００ｍｍ2／ｓの鉱物油と、
    　金属とリンとを含まない硫黄系耐荷重添加剤とを含有し、
    　前記耐荷重添加剤として少なくとも硫化オレフィンを含有する難燃性グリース組成物。     At least one thickener selected from the group consisting of metal soap thickeners and urea thickeners;
    As a base oil, a mineral oil having a kinematic viscosity at 40 ° C. of 300 to 1000 mm 2 / s,
    Contains a sulfur-based load-bearing additive that does not contain metal and phosphorus,
    A flame retardant grease composition containing at least a sulfurized olefin as the load bearing additive.
  2. 　さらに、硫化油脂及びポリスルフィドからなる群から選ばれる少なくとも１種の耐荷重添加剤を含有する請求項１記載の難燃性グリース組成物。 The flame retardant grease composition according to claim 1, further comprising at least one load-bearing additive selected from the group consisting of sulfurized fats and oils and polysulfides.
  3. 　組成物の全質量を基準として、硫化オレフィンを１～２０質量％含む請求項１又は２記載の難燃性グリース組成物。 The flame retardant grease composition according to claim 1 or 2, comprising 1 to 20% by mass of a sulfurized olefin based on the total mass of the composition.
  4. 　増ちょう剤がリチウム石けんである請求項１～３のいずれか１項記載の難燃性グリース組成物。 The flame retardant grease composition according to any one of claims 1 to 3, wherein the thickener is lithium soap.
  5. 　請求項１～４のいずれか１項記載の難燃性グリース組成物を封入してなる軸受又は歯車。 A bearing or gear comprising the flame retardant grease composition according to any one of claims 1 to 4.
  6. 　製鉄設備用である請求項５記載の軸受又は歯車。 The bearing or gear according to claim 5, which is used for iron making equipment.
PCT/JP2010/070389 2009-11-16 2010-11-16 Flame retardant grease composition WO2011059097A1 (en)

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JP6841547B2 (en) 2017-01-18 2021-03-10 出光興産株式会社 Grease composition and its manufacturing method
JP2022030575A (en) 2020-08-07 2022-02-18 協同油脂株式会社 Non-fire spread grease composition

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