WO2024101310A1 - Composition de graisse pour paliers à roulement, et palier à roulement - Google Patents

Composition de graisse pour paliers à roulement, et palier à roulement Download PDF

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Publication number
WO2024101310A1
WO2024101310A1 PCT/JP2023/039898 JP2023039898W WO2024101310A1 WO 2024101310 A1 WO2024101310 A1 WO 2024101310A1 JP 2023039898 W JP2023039898 W JP 2023039898W WO 2024101310 A1 WO2024101310 A1 WO 2024101310A1
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Prior art keywords
mass
acid
grease composition
rust inhibitor
grease
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PCT/JP2023/039898
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English (en)
Japanese (ja)
Inventor
和輝 宮内
大知 青木
昌俊 飯島
健太郎 園田
吉就 籠田
大貴 小松
Original Assignee
協同油脂株式会社
日本精工株式会社
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Publication of WO2024101310A1 publication Critical patent/WO2024101310A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/06—Mixtures of thickeners and additives
    • 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/06—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having more than one carboxyl group bound to an acyclic carbon atom or cycloaliphatic carbon atom
    • 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
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • 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
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/30—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/34—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms polycarboxylic
    • 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring

Definitions

  • the present invention relates to a grease composition for rolling bearings and a rolling bearing containing the grease composition.
  • the main spindle of a machine tool is preferably one that rotates at high speed to increase the processing efficiency, and various lubrication techniques are applied to its bearings.
  • lubrication methods suitable for a main spindle that rotates at high speed for example, oil mist lubrication, air oil lubrication, jet lubrication, etc. are known.
  • auxiliary equipment such as compressed air and oil supply devices, which is one of the causes of increasing the initial cost and running cost of the machine tool.
  • grease lubrication is a preferable lubrication method because it requires less maintenance.
  • Rolling bearings used in machine tools are often used in high speed rotation ranges exceeding dmn 800,000 (dmn: product of ball pitch circle diameter (mm) and rotation speed (min -1 )), and angular contact ball bearings or cylindrical roller bearings are used.
  • high preload is sometimes applied to increase the rigidity of the spindle, and the PV value of the rolling contact area of the inner and outer rings is often 100 MPa ⁇ m/s or more, so bearings for machine tools are required to have load-bearing performance under high-speed rotation conditions.
  • Patent Document 1 discloses a grease composition in which a urea compound as a thickener is blended in a base oil having a kinetic viscosity of 15 to 40 mm2/sec at 40°C in an amount of 9 to 14 mass% of the entire grease composition, resulting in a worked penetration of 220 to 320.
  • Patent Document 2 discloses a grease for high-speed bearings in which a urea grease using a urea compound as a thickener is blended with a non-urea grease using a complex amide lithium soap having an amide bond in the molecule as a thickener.
  • water-soluble coolant used during machining in machine tools can get into the bearings.
  • metal contact is more likely to occur, causing peeling and seizure, which will shorten the life of the bearing. It can also cause rust, leading to abnormal noise and accelerated bearing damage, making it necessary to replace the bearing in a short time.
  • Patent Document 3 proposes a method of adding a passivator to the grease composition
  • Patent Document 4 proposes a method of adding bismuth dithiocarbamate.
  • an object of the present invention is to provide a grease composition that addresses the same issues as those of rolling bearings for machine tools, and an object of the present invention is to provide a grease composition that is excellent in anti-seizure properties under high speed conditions, as well as excellent anti-flaking properties and anti-seizure properties when wet. Another object of the present invention is to provide a rolling bearing packed with the grease composition.
  • the following grease composition and a rolling bearing packed with the grease composition there is provided the following grease composition and a rolling bearing packed with the grease composition.
  • Base oil As a thickener, complex amide lithium soap,
  • As the antioxidant 0.5 to 5 mass% of an amine-based antioxidant and 0.5 to 5 mass% of a phenol-based antioxidant are used based on the total mass of the composition; and as the rust inhibitor, 0.1 to 5 mass% of a carboxylic acid-based rust inhibitor, 0.1 to 5 mass% of a carboxylate-based rust inhibitor, and 0.1 to 3 mass% of an amine salt of a fatty acid are used based on the total mass of the composition; Including, The 60-time worked penetration measured according to JIS K 2220 7. is 260 to 320.
  • the amine-based antioxidant is p,p-dioctyldiphenylamine, and the phenol-based antioxidant is benzenepropanoic acid, 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester.
  • the grease composition according to 1 above wherein the carboxylic acid-based rust inhibitor is a combination of 2-tetrapropenyl succinic acid half ester and tetrapropenyl butanedioic acid, the carboxylate-based rust inhibitor is zinc naphthenate, and the amine-based rust inhibitor is a fatty acid amine salt. 5.
  • a bearing for machine tools in which the grease composition according to any one of 1 to 4 above is packed.
  • the present invention provides a grease composition and a bearing for machine tools that are excellent in seizure resistance under high speed conditions, as well as in peeling resistance and seizure resistance when wet.
  • the grease composition of the present invention also has excellent seizure resistance at high temperatures.
  • the type of base oil used in the present invention is not particularly limited.
  • various synthetic oils such as mineral oils such as naphthenic and paraffinic, synthetic hydrocarbon oils such as polyalphaolefins (PAO) and polybutene, synthetic ether oils such as alkyl diphenyl ether, ester oils, silicone oils, and fluorinated oils can be mentioned.
  • the synthetic oil may be a so-called biomass oil produced from biological resources derived from animals and plants.
  • biomass ester oils synthesized from various fatty acids and alcohols using vegetable oils as raw materials and biomass hydrocarbon oils using vegetable oils such as palm oil, corn oil, and soybean oil can also be used.
  • the base oil may be used alone or in a mixture of two or more kinds.
  • the kinetic viscosity of the base oil of the present invention at 40°C is preferably 10 mm2/s or more, more preferably 20 mm2/s or more, from the viewpoint of ensuring the oil film thickness of the base oil in the lubricated parts and improving durability by preventing metal contact, and is preferably 80 mm2 /s or less, more preferably 40 mm2/s or less, from the viewpoint of suppressing heat generation due to stirring.
  • the content of the base oil in the composition of the present invention is preferably 49 to 77 mass%, more preferably 56 to 74 mass%, and even more preferably 67 to 74 mass%, based on the total mass of the composition, taking into consideration adhesion and use in a high-speed environment.
  • the complex amide lithium soap which is the thickener of the present invention, is synthesized from an aliphatic dicarboxylic acid, an aliphatic monoamine, lithium hydroxide, etc.
  • a thickener containing a complex amide lithium soap i.e., a mixture of lithium N-octadecylsebacamate, lithium sebacic acid, and decanediamide dioctadecyl
  • lithium hydroxide i.e., a mixture of lithium N-octadecylsebacamate, lithium sebacic acid, and decanediamide dioctadecyl
  • N-octadecylsebacamic acid, sebacic acid, and decanediamide dioctadecyl which is a reaction product of an aliphatic dicarboxylic acid and an aliphatic monoamine, is particularly preferred.
  • the composition of the present invention preferably has a consistency of 260 to 300 so as to be suitable for use in high-speed environments such as machine tool bearings. This range is also suitable for use at high temperatures. 260 to 290 is more preferable.
  • the content of the thickener in the composition of the present invention may be any amount suitable for adjusting the consistency to the above range, and is, for example, 21.5 to 27 mass%, preferably 23 to 26 mass%, based on the total mass of the composition.
  • the term "consistency" refers to the 60-stroke worked consistency measured in accordance with JIS K 2220 7. From the viewpoint of oil supplying ability, it is preferable that the grease composition of the present invention does not contain a urea-based thickener.
  • the grease composition of the present invention contains 0.5 to 5 mass % of an amine-based antioxidant and 0.5 to 5 mass % of a phenol-based antioxidant based on the total mass of the composition.
  • the content of the amine-based antioxidant in the composition of the present invention is 0.5 to 5.0 mass%. At 0.5 mass% or more, a sufficient effect of preventing oxidative deterioration is exhibited, while at more than 5.0 mass%, the effect reaches a plateau. 0.5 to 3 mass% is preferable, and 0.8 to 2 mass% is more preferable.
  • the content of the phenolic antioxidant in the composition of the present invention is 0.5 to 5.0 mass%.
  • the content is preferably 1 to 3 mass%, and more preferably 1.5 to 2.5 mass%.
  • the amine-based antioxidant that can be used in the present invention is preferably selected from the group consisting of p,p'-dioctyldiphenylamine, N-phenyl- ⁇ -naphthylamine, alkylated phenyl- ⁇ -naphthylamine, and mixtures thereof, of which p,p'-dioctyldiphenylamine is particularly preferred.
  • the phenolic antioxidant that can be used in the present invention is preferably selected from the group consisting of 2,6-di-tert-butyl-4-methylphenol, pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), benzenepropanoic acid, 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester, octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, and mixtures thereof.
  • benzenepropanoic acid 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester is particularly preferred.
  • a combination of p,p'-dioctyldiphenylamine and benzenepropanoic acid, 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester is preferred.
  • a combination of 0.8 to 2 mass % of p,p'-dioctyldiphenylamine and 1.5 to 2.5 mass % of benzenepropanoic acid, 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester is preferred.
  • the grease composition of the present invention contains, based on the total mass of the composition, 0.1 to 5 mass % of a carboxylic acid-based rust inhibitor, 0.1 to 5 mass % of a carboxylate-based rust inhibitor, and 0.1 to 3 mass % of an amine salt of a fatty acid.
  • the content of the carboxylic acid-based rust inhibitor in the composition of the present invention is 0.1 to 5 mass%. At 0.1 mass% or more, sufficient water resistance and rust prevention are exhibited, while at more than 5 mass%, the effect reaches a plateau. 0.2 to 3 mass% is preferable, and 0.2 to 1 mass% is more preferable.
  • the content of the carboxylate-based rust inhibitor in the composition of the present invention is 0.1 to 5 mass%. At 0.1 mass% or more, sufficient water resistance and rust prevention are exhibited, while at more than 5 mass%, the effect reaches a plateau. 0.2 to 3 mass% is preferable, and 0.2 to 1 mass% is more preferable.
  • the content of the fatty acid amine salt in the composition of the present invention is 0.1 to 3 mass%. At 0.1 mass% or more, water resistance and rust prevention are exhibited, while at more than 3 mass%, the effect plateaus. 0.3 to 2.5 mass% is preferable, and 0.5 to 2 mass% is more preferable.
  • carboxylic acid-based rust inhibitor examples include monocarboxylic acids such as straight-chain fatty acids such as lauric acid and stearic acid, and saturated carboxylic acids having a naphthenic nucleus; dicarboxylic acids such as succinic acid, alkyl succinic acids, alkyl succinic acid half esters, alkenyl succinic acids, alkenyl succinic acid half esters, and succinic acid imides; tetrapropenyl butanedioic acid, hydroxy fatty acids, mercapto fatty acids, and sarcosine derivatives.
  • monocarboxylic acids such as straight-chain fatty acids such as lauric acid and stearic acid, and saturated carboxylic acids having a naphthenic nucleus
  • dicarboxylic acids such as succinic acid, alkyl succinic acids, alkyl succinic acid half esters, alkenyl succinic acids, alkenyl succinic acid half
  • Carboxylate-based rust inhibitors that can be used in the present invention include metal salts of fatty acids, naphthenic acids, abietic acids, lanolin fatty acids, alkenyl succinic acids, amino acid derivatives, etc.
  • Metal elements include cobalt, manganese, zinc, aluminum, calcium, barium, lithium, magnesium, copper, etc., and zinc naphthenate is particularly preferred.
  • Examples of the amine salt of a fatty acid that can be used in the present invention include alkoxylphenylamines, amine salts of a fatty acid, and partial amides of dibasic carboxylic acids, with the amine salts of a fatty acid being preferred.
  • a combination of a carboxylic acid-based rust inhibitor containing an alkenyl succinic acid half ester, zinc naphthenate, and an amine salt of a fatty acid is preferred, and a combination of 2-tetrapropenyl succinic acid half ester, tetrapropenyl butanedioic acid, zinc naphthenate, and an amine salt of a fatty acid is even more preferred.
  • a combination of a carboxylic acid-based rust inhibitor containing 0.2 to 0.8 mass% of an alkenylsuccinic acid half ester, 0.2 to 0.8 mass% of zinc naphthenate, and 0.8 to 1.2 mass% of an amine salt of a fatty acid is preferred.
  • a combination of 0.1 to 0.4 mass% of 2-tetrapropenylsuccinic acid half ester, 0.1 to 0.4 mass% of tetrapropenylbutanedioic acid, 0.2 to 0.8 mass% of zinc naphthenate, and 0.8 to 1.2 mass% of an amine salt of a fatty acid is preferred.
  • the composition of the present invention includes
  • the base oil is a mixed oil having a mineral oil:PAO ratio of 35:65 to 45:55 and a kinematic viscosity at 40°C of 20 to 40 mm 2 /s;
  • the thickener is a complex amide lithium soap which is a reaction product of a mixture of N-octadecylsebacamic acid, sebacic acid, and dioctadecyl decanediamide with lithium hydroxide;
  • As antioxidants based on the total mass of the composition, 0.8 to 2 mass% of p,p'-dioctyldiphenylamine, and 1.5 to 2.5 mass% of benzenepropanoic acid, 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy C7-C9 side chain alkyl ester are included; and as rust inhibitors, based on the total mass of the composition, 0.1 to 0.4 mass% of 2-tetrapropenyl succ
  • the grease composition of the present invention may further contain additives that are commonly used in grease compositions, such as extreme pressure agents and waxes.
  • extreme pressure agents include phosphite esters of triphenyl phosphorothioate, triphenyl phosphite, triethyl phosphite, glycerol fatty acid esters such as glycerol monocaprate and glycerol monostearate.
  • the wax include monoamide wax, ester wax, ketone wax, and oxidized polyethylene wax.
  • the content of such optional additives is, for example, 0.1 to 5 mass %, preferably 0.3 to 3 mass %, based on the total mass of the composition.
  • the grease composition of the present invention is used for rolling bearings. It is particularly preferred to use it for rolling bearings of machine tool bearings, and even more particularly for the spindle support parts of rolling bearings of machine tools.
  • the grease composition can also be used for bearings that slide and rotate at high speeds, similar to machine tool bearings. It can also be used for bearings that slide and rotate at high speeds and high temperatures.
  • Examples 1 to 3 and Comparative Examples 2 to 5 A mixture of N-octadecylsebacamic acid, sebacic acid, and dioctadecyl decanediamide was reacted with lithium hydroxide in a base oil, and the mixture was heated and cooled to obtain a base grease. Additional base oil was added so as to obtain the 60-times worked penetration shown in Table 1, and each additive was added in the ratio shown in Table 1, and the mixture was dispersed using a three-roll mill to obtain the grease compositions of Examples 1 to 3 and Comparative Examples 2 to 5. The blending ratios and types of each component are as shown in Table 1.
  • Comparative Example 1 A grease composition of Comparative Example 1 was obtained in the same manner as above, except that a base grease containing lithium 12-hydroxystearate as the base oil was used.
  • Adhesion evaluation test evaluation of seizure resistance under high speed conditions
  • a tablet of test grease 4 is placed on the SPCC-SB steel plate shown in FIG. 1, and the steel plate is rotated under the conditions described below, and the amount of grease remaining after the test (g) is measured.
  • ⁇ Rotation speed 1000 rpm
  • Test time 3 min
  • Remaining grease amount is less than 0.045g
  • Oil supply test evaluation of seizure resistance
  • a tablet of grease is placed on a round 5C filter paper and left to stand in an air-circulating thermostatic chamber at 40°C for 168 hours.
  • the oil supply rate is calculated from the change in weight of the filter paper before and after the test using the following formula.
  • Oil supply amount % (amount of oil seeped into the filter paper after the test (g)/amount of grease before the test (g)) ⁇ 100 ⁇ Evaluation>
  • Oil supply rate is 30% or more and less than 50%
  • Oil supply rate is less than 30% or 50% or more
  • Centrifugal oil separation test evaluation of seizure resistance under high speed conditions
  • Grease 4 to be tested is placed in body 3 of test container 2, the inside of which is divided by mesh 1 (Fig. 2), and this test container 2 is connected to the tip of arm 5 of centrifugal oil separation tester 6 (Fig. 3), which has an arm 5 that rotates around rotation axis S, and the arm 5 is rotated under the conditions described below, causing centrifugal force to act on the grease in test container 2 as shown by the dotted line in Fig. 3.
  • the oil separation degree is calculated from the weight of the separated oil.
  • Oil separation rate % (amount of separated oil in g/amount of grease before test in g) x 100 ⁇ Evaluation> ⁇ : Oil separation rate is 15% or more and less than 30% ⁇ : Oil separation rate is less than 15% or 30% or more
  • Grease water absorption test evaluation of peeling resistance and seizure resistance when wet
  • the water absorption (%) is calculated according to the Defense Agency standard NDS K 2756B. ⁇ Evaluation> ⁇ : Water absorption rate less than 25% ⁇ : Water absorption rate 25% or more

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

Abstract

La présente invention concerne une composition de graisse pour paliers à roulement, la composition de graisse contenant : une huile de base ; un agent épaississant qui est composé d'un savon composite d'amide de lithium ; un antioxydant qui est composé de 0,5 à 5 % en masse d'un antioxydant amine et de 0,5 à 5 % en masse d'un antioxydant phénol par rapport à la masse totale de la composition ; et un inhibiteur de rouille qui est composé de 0,1 à 5 % en masse d'un inhibiteur de rouille acide carboxylique, de 0,1 à 5 % en masse d'un inhibiteur de rouille sel de carboxylate et de 0,1 à 3 % en masse d'un sel d'amine d'un acide gras par rapport à la masse totale de la composition. Cette composition de graisse pour paliers à roulement a une pénétration de graisse lubrifiante travaillée à 60 coups de 260 à 320 telle que déterminée conformément à JIS K 2220 7.
PCT/JP2023/039898 2022-11-07 2023-11-06 Composition de graisse pour paliers à roulement, et palier à roulement WO2024101310A1 (fr)

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JP2022177871 2022-11-07
JP2022-177871 2022-11-07

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911607B1 (fr) * 1970-10-31 1974-03-18
JPS63108098A (ja) * 1986-10-24 1988-05-12 Kyodo Yushi Kk 耐高荷重グリ−ス組成物
JPH0218497A (ja) * 1988-07-07 1990-01-22 Kyodo Yushi Kk 耐高荷重グリース組成物
JP2009209990A (ja) * 2008-03-03 2009-09-17 Ntn Corp モータ用グリース封入軸受
WO2009139371A1 (fr) * 2008-05-16 2009-11-19 Ntn株式会社 Graisse pour palier à haute vitesse
JP2010024440A (ja) * 2008-06-16 2010-02-04 Kyodo Yushi Co Ltd グリース組成物
JP2010043183A (ja) * 2008-08-12 2010-02-25 Ntn Corp 自在継手用グリースおよび自在継手
WO2010027019A1 (fr) * 2008-09-05 2010-03-11 Ntn株式会社 Composition de graisse et roulement à rouleaux et joint universel lubrifié par ladite composition de graisse
WO2011046079A1 (fr) * 2009-10-13 2011-04-21 Ｎｏｋクリューバー株式会社 Composition de graisse lubrifiante pour coulissement alternatif, et procédé de fabrication afférent
JP2014108999A (ja) * 2012-12-03 2014-06-12 Kyodo Yushi Co Ltd 鉄道車両の主電動機軸受用グリース組成物及び軸受

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911607B1 (fr) * 1970-10-31 1974-03-18
JPS63108098A (ja) * 1986-10-24 1988-05-12 Kyodo Yushi Kk 耐高荷重グリ−ス組成物
JPH0218497A (ja) * 1988-07-07 1990-01-22 Kyodo Yushi Kk 耐高荷重グリース組成物
JP2009209990A (ja) * 2008-03-03 2009-09-17 Ntn Corp モータ用グリース封入軸受
WO2009139371A1 (fr) * 2008-05-16 2009-11-19 Ntn株式会社 Graisse pour palier à haute vitesse
JP2010024440A (ja) * 2008-06-16 2010-02-04 Kyodo Yushi Co Ltd グリース組成物
JP2010043183A (ja) * 2008-08-12 2010-02-25 Ntn Corp 自在継手用グリースおよび自在継手
WO2010027019A1 (fr) * 2008-09-05 2010-03-11 Ntn株式会社 Composition de graisse et roulement à rouleaux et joint universel lubrifié par ladite composition de graisse
WO2011046079A1 (fr) * 2009-10-13 2011-04-21 Ｎｏｋクリューバー株式会社 Composition de graisse lubrifiante pour coulissement alternatif, et procédé de fabrication afférent
JP2014108999A (ja) * 2012-12-03 2014-06-12 Kyodo Yushi Co Ltd 鉄道車両の主電動機軸受用グリース組成物及び軸受

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