DE112017006086T5 - Grease composition and rolling bearings - Google Patents

Abstract

The present invention is a grease composition comprising a fluorine-based grease, a urea-based grease and a soap-based grease (a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener or a sodium soap thickener), and a rolling bearing in which the grease composition is filled ,

Description

Technical area

The present disclosure relates to a grease composition and a rolling bearing, and more particularly to a grease composition which achieves excellent acoustic properties not only in a high temperature and high speed environment but also in a high load environment, and a rolling bearing suitable for a small motor.

State of the art

As a rolling bearing used for small motors, such as a fan motor and a high-speed motor used for automobiles, there are, for example, so-called ball bearings of a small diameter having an outer diameter of 22 mm or less. Since such a small diameter ball bearing is required for durability in a high temperature environment, a fluorine-based grease excellent in heat resistance, a fluorine-based grease and a urea-based grease, and the like are excellent in heat resistance and oxidation resistance ,

For example, Patent Document 1 discloses a rolling bearing filled with a grease containing fluororesin particles as a thickening agent, an aspartic acid-based specific rust inhibitor, and an oiling agent in a fluorine-based base oil (perfluoropolyether oil) for high-temperature durability and torque stability to reach low temperatures.

In addition, there is proposed a grease composition containing a perfluoropolyether base oil and a specific carboxylic acid metal salt as a thickening agent which can improve wear resistance with respect to counterpart materials, leakage resistance, washability and the like, while taking the cost into account (Patent Document 2).

State of the art document

Patent document

• Patent Document 1: Japanese Patent No. 4239514
• Patent Document 2: Japanese Patent No. 4505954

Summary of the invention

Problems to be solved by the invention

Although the above-mentioned fluorine-based grease, especially a fluorine-based grease using perfluoropolyether as a base oil, has excellent heat resistance, it is known that when the fluorine-based grease is used at a high load or overloaded condition by mis-assembly, the fluoro-oil (Perfluoropolyether), which is a base oil, decomposes to form hydrofluoric acid, causing corrosion on a metal surface such as a rolling surface of the bearing. The metal corrosion on the rolling surface may become a cause of deterioration of the acoustic property and occurrence of a rotation defect.

Therefore, there is a need for a grease capable of preventing a rotational defect and noise increase in rolling bearings not only at a high-temperature and high-speed condition but also at a high-load condition.

The present disclosure has been conceived in consideration of such a situation, and an object of the present disclosure is to provide a grease composition capable of preventing a noise increase in a high-temperature and high-speed condition as well as a high-load condition, and also a rolling bearing by applying the fat composition of the present disclosure has an excellent heat-resistant acoustic property and a load-bearing acoustic property.

Means of solving the problem

The inventors of the present application have conducted intensive studies to achieve the above-mentioned object, and as a result found that by mixing in base oil-specific amounts of three kinds of thickening agents, i. a fluorine-based thickener, a urea-based thickener and a soap-based thickener such as a calcium complex soap thickener, a grease composition excellent in heat resistance and load resistance and capable of increasing noise in a high-temperature and high-speed test and To prevent high load test. Thus, the present disclosure has been completed.

That is, one aspect of the present disclosure relates to a grease composition comprising: a fluorine-based base oil and a non-fluorine-based base oil as base oils; and a fluorine-based thickener, a urea-based thickener and at least one soap-based thickener selected from the group consisting of a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener and a sodium soap thickener as a thickener.

As a preferred embodiment of the present disclosure, it is preferable that the urea-based thickening agent contains at least one of an aliphatic-aromatic urea, an alicyclic-aliphatic urea, and an aliphatic urea.

It is preferable that the urea-based thickener contains a diurea compound represented by the following general formula (1): R ₁ -NHCONH-R ₂ -NHCONH-R ₃ (1) (put in the formula R ₁ and R ₃ each independently represents a monovalent aliphatic hydrocarbon group, a monovalent alicyclic hydrocarbon group or a monovalent aromatic hydrocarbon group, and at least one of R ₁ and R ₃ represents a monovalent aliphatic hydrocarbon group or a monovalent alicyclic hydrocarbon group, and
R ₂ represents a divalent aromatic hydrocarbon group).

It is preferable that the grease composition is 70% by mass to 90% by mass of a total amount of the fluorine-based base oil and the non-fluorine base oil, 9% to 18% by mass of the fluorine-based thickener, 0.5% by mass. to 7% by mass of the urea-based thickener and 0.3% to 3% by mass of the calcium complex soap thickening agent, based on a total amount (100% by mass) of the grease composition. It is further preferable that the calcium complex soap thickener is a calcium complex soap of an aliphatic dicarboxylic acid and a monoamide monocarboxylic acid.

Optionally, it is preferable that the fat composition comprise 70% to 90% by mass of a total of fluorine-based and non-fluorine-based base oils, 9% to 18% by mass of the fluorophilic thickener, 0.5% by mass. % to 7 mass% of the urea-based thickener and 0.3 mass% to 3 mass% of the calcium soap thickener, based on a total amount of the grease composition.

Optionally, it is preferable that the fat composition comprise 70% to 90% by mass of a total of fluorine-based and non-fluorine-based base oils, 9% to 18% by mass of the fluorophilic thickener, 0.5% by mass. % to 7% by mass of the urea-based thickener and 0.6% to 3.6% by mass of the barium soap thickener, based on a total amount of the grease composition.

Optionally, it is preferable that the fat composition comprise 70% to 90% by mass of a total of fluorine-based and non-fluorine-based base oils, 9% to 18% by mass of the fluorophilic thickener, 0.5% by mass. % to 7 mass% of the urea-based thickener and 0.6 mass% to 3.6 mass% of the magnesium soap thickener, based on a total amount of the grease composition.

Optionally, it is preferable that the fat composition comprise 70% to 90% by mass of a total of fluorine-based and non-fluorine-based base oils, 9% to 18% by mass of the fluorophilic thickener, 0.5% by mass. % to 7% by mass of the urea-based thickener and 0.6% to 3.6% by mass of the sodium soap thickening agent, based on a total amount of the grease composition.

It is preferable that the non-fluorine-based base oil is one or more selected from the group consisting of a hydrocarbon-based synthetic oil, an ether-based synthetic oil, an ester-based synthetic oil, and a silicone-based synthetic oil.

The present disclosure also relates to a rolling bearing in which the grease composition is filled.

Effect of the invention

According to the present disclosure, it is possible to provide a rolling bearing having a good acoustic performance at a high temperature and a high load, which is excellent in heat resistance and load resistance, by applying the grease composition having the above composition to a rolling bearing.

list of figures

• [ 1 ] 1 FIG. 12 is a schematic diagram for explaining a structure of a rolling bearing according to the present disclosure. FIG.
• [ 2 ] 2 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and a load resistance test by means of an Anderon meter when the content of calcium complex soap thickener in a mixed fat of three kinds of fat, ie, fluorine-based grease, urea-based grease and a calcium complex soap fat.
• [ 3 ] 3 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and an Anderon gauge load resistance test when the content of calcium soap thickener in a mixed fat of three kinds of fat, ie, fluorine-based grease, urea-based grease and a calcium soap fat, is changed.
• [ 4 ] 4 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and a load resistance test by means of an Anderon meter when the content of barium soap thickener in a mixed fat of three kinds of fat, ie, fluorine-based grease, urea-based grease and a barium soap fat, is changed.
• [ 5 ] 5 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and a load resistance test by means of an Anderon gauge when the content of magnesium soap thickener in a mixed fat of three types of fat, ie, fluorine-based grease, urea-based grease and a magnesium soap grease, is changed.
• [ 6 ] 6 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and an Anderon meter load resistance test when the content of sodium soap thickener in a mixed fat of three types of fat, ie, fluorine-based grease, urea-based grease and a sodium soap fat, is changed.
• [ 7 ] 7 Fig. 12 is a graph showing results (Anderon values of M-band) of a heat resistance test and a load resistance test by means of an Anderon meter when the content of lithium soap thickener in a mixed fat of three kinds of fat, ie, fluorine-based grease, urea-based grease and a lithium soap grease.

Description of the embodiments

As described above, the fluorine-based grease has a problem that fluorine oils (base oils) decompose during use at a high load and corrosion of the metal surface occurs due to formation of hydrofluoric acid, and among the fluoro oils, this problem is particularly easy to occur Grease using perfluoropolyether having a straight-chain structure as a base oil.

To solve this problem, the inventors of the present application studied the composition of a grease composition having heat resistance and load resistance, and it was found that mixing a hybrid grease of a fluorine-based grease and a urea-based grease having good heat resistance with a soap-based grease containing as a thickening agent a soap-based thickener, such as a calcium complex soap thickener, can lead to a solution against corrosion on the running surface under a high load condition.

Subsequently, the inventors of the present application first compared and investigated the influence of the changes in the blending amounts of the urea-based fat and the calcium complex soap grease on the heat resistance and the load resistance of a mixed fat by changing their blending amounts while constantly maintaining the blending amount of the fluorine-based grease to eliminate the influence of the fluorine-based fat in the mixed fat of the three types of fat (the fluorine-based grease, the urea-based grease and the calcium complex soap grease as an example of the soap-based grease). In the present disclosure, a bearing was rotated using the mixed grease under a high-temperature and high-speed condition or a high-load condition, then the acoustic power was measured by means of an Anderon gauge, and the resulting Anderon value was used as an indicator of heat resistance and load resistance used. Therefore, as described later in the present disclosure, a load resistance evaluation means an evaluation acoustic test after rotating the bearing under a high load condition, and a heat resistance test (heat resistance evaluation) means an acoustic evaluation test after rotating the bearing in a high temperature environment.

Then, it was confirmed that in the load resistance test, when the content of the calcium complex soap thickening agent was larger than a certain amount, the noise increase evaluated by the Anderon value can be prevented and the acoustic evaluation becomes better as the content increases.

On the other hand, in the heat resistance test, the noise increase was prevented until the content of the calcium complex soap thickener reached a certain amount, but the noise increase took place as soon as the certain amount was exceeded.

Based on these results, the similar evaluation was also made for various fluorine-based grease mixture amounts, and the blending amount for achieving a good acoustic property was confirmed in both the load resistance test and the heat resistance test.

In addition, the similar evaluation was carried out using soap soap fat, barium soap fat, magnesium soap fat, and sodium soap fat as soap-based fats, and in these soap-based fats, a blending amount capable of achieving good acoustic properties was also found the load resistance test as well as in the heat resistance test confirmed.

As an example shows 2 the results obtained by means of an Anderon tester in a heat resistance test (preload: 39 N, test temperature: 180 ° C, speed: 21,000 rpm, 200 hours) and in a load resistance test (preload: 500 N, test temperature: room temperature, speed: 3,000 Rpm, 100 hours) when the blending amounts of the fluorine-based fat, the urea-based fat and the calcium complex soap fat in a mixed fat (fat composition) are changed from three kinds of fat (the fluorine-based fat, the urea-based fat and the calcium complex soap fat) , Detailed procedures and details of the results are given in the examples described below.

In detail shows 2 the content (% by mass) of the calcium complex soap thickener based on the total amount of the mixed fat indicated by the horizontal axis and the Anderon value of the M-band after each test indicated by the vertical axis when in mixed fats of three types of fat Blend amount of the fluorine-based grease from 90% by mass to 49% by mass (the content of the fluorine-based thickener is in the range of 17.8% by mass to 9.8% by mass, based on 100% by mass of the mixed grease) is changed, the blending amount of the urea-based fat from 0% by mass to 48% by mass (the content of the urea-based thickener is in the range of 0% by mass to 7.2% by mass, based on 100% by mass of the mixed fat) and the blending amount of the calcium complex soap fat from 0% by mass to 29% by mass (the content of the calcium complex soap thickener is in the range of 0% by mass to 4.3% by mass, based on 100% by mass of the mixed fat) and the Anderon values for each fat are measured after the heat resistance test or after the load resistance test. In 2 shows the dashed line parallel to the horizontal one Axis the Anderon value of 15 on. Significant wear was observed in the experimental conditions of the examples when the Anderon value 15 or more. Therefore it was evaluated that the Anderon value of less than 15 is preferred.

As in 2 when the content of the calcium complex soap thickener is more than a certain amount (in the case of 2 about 0.3 mass%, especially 0.5 mass%), it is verified that in the load resistance test (high load test: ■ (black square)) the noise increase, which is evaluated by the Anderon value, is prevented, and the acoustic rating improves with increasing content.

On the other hand, although the prevention of noise increase in the heat resistance test (high temperature and high speed test: ⃟ (diamond)) is achieved until the content of the calcium complex soap thickener reaches a certain amount (about 3 mass%) 2 ), the noise increase takes place as soon as the specified amount is exceeded.

As in the results of 2 When the content of the calcium complex soap thickening agent is shown to be in the range of 0.3 mass% to 3 mass%, particularly 0.5 mass% to 3 mass%, it can be confirmed that, based on the total amount of the mixed fat. (The blending amount of the calcium complex soap fat based on the total amount of the mixed fat is in the range of 2% by mass to 20% by mass, particularly 4% by mass to 20% by mass) in the mixed fat of three types of fat, ie, the fat fluorine-based, urea-based grease and calcium complex soap grease, a good acoustic property can be obtained in both the load resistance test and the heat resistance test. In 2 The range indicated by the arrow parallel to the horizontal axis indicates the content range of the calcium complex soap thickener capable of giving a good acoustic property (Anderon value: less than 15) in both the load resistance test and the heat resistance test.

The inventors have based on the in 2 The upper and lower limits of the mixing ratio of these three types of fat (three kinds of thickening agents) are examined to carry out the invention according to the present disclosure.

A grease composition to be filled into a rolling bearing according to the present disclosure (hereinafter referred to simply as "grease composition") is characterized by combining certain thickening agents as described below. This will be described in detail below.

[Rolling]

First, the preferred embodiments of a rolling bearing according to the present disclosure will be described in detail with reference to the accompanying drawings. The invention according to the present disclosure is not limited by the following embodiments.

1 is a radial cross-sectional view of a rolling bearing (ball bearing) 10 according to a preferred embodiment of the present disclosure.

The rolling bearing 10 has a basic structure similar to the conventional rolling bearing and includes an annular inner ring 11 , an annular outer ring 12 , a variety of rolling elements 13 , a container 14 and annular sealing elements 15 ( 15a . 15b ).

The inner ring 11 is a cylindrical structure to be coaxially arranged with a central axis of a shaft. The outer ring 12 is a cylindrical structure coaxial with the inner ring 11 on an outer peripheral side of the inner ring 11 is arranged.

Each of the plurality of rolling elements 13 is a sphere that is attached to a track in a storage room (annulus) 16 is arranged between the inner ring 11 and the outer ring 12 is formed. That is, the rolling bearing 10 in the present embodiment is a ball bearing.

In the storage room 16 is a fat composition G filled as a lubricant. The annular sealing elements 15 ( 15a . 15b ) are formed of, for example, a steel plate extending from an inner circumferential surface of the outer ring 12 to the inner ring 11 Side and seal the storage room 16 from the outside. The amount of in the storage room 16 filled fat composition G is for example 5% up to 50% of the volume of the storage room 16 , An amount of about 25% to 35% is preferred to achieve both torque performance and lifetime performance.

On the inner peripheral surface of the outer ring 12 is in a circumferential direction of the outer ring 12 a concave part 12a formed with an arcuate cross-section. In addition, on an outer circumferential surface of the inner ring 11 a concave part 11a with an arcuate portion in a circumferential direction of the inner ring 11 educated. The variety of rolling elements 13 is in the circumferential direction through the concave part 11a and the concave part 12a guided.

The container 14 is arranged in the track and configured to the plurality of rolling elements 13 to keep. The container 14 is an annular member which is installed coaxially with the central axis of the shaft and a plurality of concave parts for holding the rolling elements 13 on one side in the direction of the central axis, and is configured to the rolling elements 13 in the concave parts. The shape (such as crown shape or ribbon type) and the material (such as steel plate or resin) of the container 14 can be selected appropriately and are not limited to specific shapes and materials.

In the rolling bearing 10 with the above configuration, the fat composition acts G to reduce the friction between the rolling elements 13 and the container 14 and the friction between the rolling elements 13 and the inner ring 11 or the outer ring 12 to reduce. As from the in 1 shown configuration, which enters the rolling bearing 10 filled fat composition G when turning the rolling bearing 10 between the rolling elements 13 and the inner ring 11 or the outer ring 12 on.

[Fat composition]

Next, the grease composition to be filled in the rolling bearing of the present disclosure will be described.

<Base Oil>

In the grease composition to be filled in the rolling bearing according to the present embodiment, as base oils, a fluorine-based base oil and a non-fluorine-based base oil are used.

Examples of the fluorine-based base oil include those containing perfluoropolyethers (PFPE) as a main component. PFPE is a compound represented by the general formula: R f O (CF ₂ O) _p (C ₂ F ₄ O) _q (C ₃ F ₆ O) _{r R} f (R f: perfluoro lower alkyl group; p, q and r: integer).

Perfluoropolyether is largely classified into a linear perfluoropolyether and a side chain perfluoropolyether, and the linear perfluoropolyether has a lower temperature dependence of kinetic viscosity than the side chain perfluoropolyether. That is, the linear perfluoropolyether has a lower viscosity than the side chain perfluoropolyether in a low temperature environment and a higher viscosity than the side chain perfluoropolyether in a high temperature environment. In particular, when it is considered to be used in a high-temperature environment, it is desirable from the viewpoint of preventing the outflow of the fat from the applied part and the resulting lack of grease that the viscosity be high in a high-temperature environment. it is preferable to use a linear perfluoropolyether.

The non-fluorine-based base oil is not particularly limited, and hydrocarbon-based synthetic oils, synthetic ether-based oils such as alkyl ether oils and alkyldiphenyl ether oils, synthetic ester-based oils and silicone-based synthetic oils generally used as a grease base oil may be used singly or in combination Combination can be used as the base oil based on non-fluorine.

Examples of hydrocarbon-based synthetic oils include polyalphaolefins (PAO) such as normal paraffin, isoparaffin, polybutene, polyisobutylene, a 1-decene oligomer, a 1-deceneethylene oligomer, or the like.

Examples of the synthetic ester-based oils include: diester oils such as dibutyl sebacate, di-2-ethylhexyl sebacate, dioctyl sebacate, dioctyl adipate, diisodecyl adipate, ditridecyl adipate, ditridecyl phthalate and methyl acetylcinolate; aromatic ester oils such as trioctyl trimellitate, tri-2-ethylhexyl trimellitate, tridecyl trimellitate, tetraoctyl pyromellitate and tetra-2-ethylhexyl pyromellitate; Polyolester oils such as trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethylhexanoate and pentaerythritol pelargonate; and carbonate ester oils.

Examples of the alkyldiphenyl ether oils include monoalkyldiphenyl, dialkyldiphenyl, polyalkyldiphenyl or the like.

Among the above, the aromatic ester oils are preferred and may be used singly or in combination.

The mixing ratio of the fluorine-based base oil and the non-fluorine-base base oil is not particularly limited, and, for example, the ratio (fluorine-based base oil: non-fluorine-base base oil) based on the total amount (100 mass%) of the base oils (95 mass -% to 5 mass%: 5 mass% to 95 mass%), for example (95 mass% to 40 mass%: 5 mass% to 60 mass%).

Moreover, the total amount of the fluorine-based base oil and the non-fluorine-based base oil in the total amount of the fat composition according to the present invention may be 70 mass% to 90 mass%, for example 75 mass% to 95 mass% and 75 mass%. % to 85% by mass.

<Thickener>

A fluorine-based thickener, a urea-based thickener and at least one soap-based thickener selected from the group consisting of a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener and a sodium soap thickener are added to the grease composition of the present invention as a thickener.

Among them, it is preferable to use 9 mass% to 18 mass% of the fluorine-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener and 0.3 mass% to 3 mass% of the calcium complex soap thickener, based on the total amount of the fat composition.

Optionally, it is preferable to use 9 mass% to 18 mass% of the fluoro-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener, and 0.3 mass% to 3 mass% of the calcium soap thickener to contain the total amount of fat composition.

Optionally, it is preferable to use 9 mass% to 18 mass% of the fluoro-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener, and 0.6 mass% to 3.6 mass% of the barium soap thickener , based on the total amount of the fat composition.

Optionally, it is preferable to use 9 mass% to 18 mass% of the fluoro-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener, and 0.6 mass% to 3.6 mass% of the magnesium soap thickener , based on the total amount of the fat composition.

Optionally, it is preferable to use 9 mass% to 18 mass% of the fluoro-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener, and 0.6 mass% to 3.6 mass% of the sodium soap thickener , based on the total amount of the fat composition.

It is preferable that the total amount of the fluorine-based thickener, the urea-based thickener and at least one soap-based thickener selected from the group consisting of a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener and a sodium soap thickener (the total amount of thickeners). 10% by mass to 30% by mass, especially 10% by mass to 20% by mass, based on the total amount of the fat composition.

<Fluorophilic thickener>

As the fluorine-based thickening agents, fluorine resin particles are preferable, and for example, particles of polytetrafluoroethylene (PTFE) are preferably used. PTFE is a polymer of tetrafluoroethylene and is represented by the general formula: [C ₂ F ₄ ] _n (n: degree of polymerization).

Other examples of the fluorine-based thickener which can be used include a perfluoroethylene-propylene copolymer (FEP), an ethylene tetrafluoroethylene copolymer (ETFE), and a tetrafluoroethylene perfluoroalkyl vinyl ether copolymer (PFA).

The size of the PTFE particles is not particularly limited, and for example, polytetrafluoroethylene having an average particle size of 0.5 μm to 100 μm can be used. The shape of the PTFE particles is not particularly limited and may be spherical, polyhedral, needle-like or the like.

The fluorine-based thickener is preferably used in an amount of 9% by mass to 18% by mass based on the total amount of the fat composition.

<Urea based thickener>

Since the urea compound is excellent in both heat resistance and water resistance and is excellent particularly in stability at high temperatures, it is suitably used as a thickener for parts exposed to high temperature environment.

A urea compound such as a diurea compound, a triurea compound and a polyurea compound can be used as the urea-based thickening agent. In particular, it is preferable to use a diurea compound from the viewpoint of heat resistance and acoustic property (quietness). The kind of the urea compound preferably includes at least one of an aliphatic-aromatic urea, an alicyclic-aliphatic urea and an aliphatic urea.

As the above-mentioned urea-based thickening agents, conventionally known urea compounds can be used.

Among these urea compounds, the diurea compound represented by the following general formula (1) is a urea-based thickener suitable for the present invention. R ₁ -NHCONH-R ₂ -NHCONH-R ₃ (1)

In the preceding formula (1) R ₁ and R ₃ each independently represents a monovalent aliphatic hydrocarbon group, a monovalent alicyclic hydrocarbon group or a monovalent aromatic hydrocarbon group, and at least one of R ₁ and R ₃ represents a monovalent aliphatic hydrocarbon group or a monovalent alicyclic hydrocarbon group.

In addition, it presents R ₂ a divalent aromatic hydrocarbon group.

Examples of the monovalent aliphatic hydrocarbon group include a linear or branched, saturated or unsaturated alkyl group 6 to 26 Carbon atoms.

Examples of the monovalent alicyclic hydrocarbon group include a cycloalkyl group 5 to 12 Carbon atoms.

In addition, examples of the aromatic hydrocarbon group include a monovalent or divalent aromatic hydrocarbon group 6 to 20 Carbon atoms.

The urea compound used as the urea-based thickening agents can be synthesized using an amine compound and an isocyanate compound.

Examples of the amine compound to be used herein include: aliphatic amines represented by hexylamine, octylamine, dodecylamine, hexadecylamine, octadecylamine, stearylamine, oleylamine or the like; cycloaliphatic amines represented by cyclohexylamine or the like; and aromatic amines represented by aniline, p-toluidine, ethoxyphenylamine or the like.

Examples of the isocyanate compound include: aromatic diisocyanates such as phenylene diisocyanate, tolylene diisocyanate, diphenyl diisocyanate and diphenylmethane diisocyanate; and aliphatic diisocyanates such as octadecanediisocyanate, decanediisocyanate and hexane diisocyanate.

Among them, it is preferable to use an aliphatic-aromatic diurea compound obtained by using an aliphatic amine and an aromatic amine as an amine starting material and an aromatic diisocyanate for carrying out the synthesis.

When an aromatic diurea compound obtained from an aromatic monoamine and an aromatic diisocyanate is used as a urea-based thickener, there is a possibility of causing an abnormal noise so that its use should be carefully considered.

The urea-based thickener is preferably used in an amount of 0.5% by mass to 7% by mass based on the total amount of the fat composition.

<Soap-based thickener>

In the present invention, a soap-based thickener is used in addition to the above-mentioned fluorine-based thickener and urea-based thickener.

In the present invention, a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener and a sodium soap thickener may be used as the soap-based thickener.

<Calcium complex soap thickener>

It is preferable to use a calcium complex soap having improved heat resistance in the present invention. For example, a calcium complex soap of a higher fatty acid and a lower fatty acid, a calcium complex soap containing a calcium salt of a dibasic acid and a fatty acid, or the like can be used.

Among them, it is preferable to use a calcium complex soap of an aliphatic dicarboxylic acid and a monoamide monocarboxylic acid as the calcium complex soap thickener in the fat composition of the present invention.

As the aliphatic dicarboxylic acid is a saturated or unsaturated dicarboxylic acid with 2 to 20 Carbon atoms used.

Examples of the saturated dicarboxylic acid include an oxalic acid, a malonic acid, a succinic acid, a methylsuccinic acid, a glutaric acid, an adipic acid, a pimelic acid, a suberic acid, an azelaic acid, a sebacic acid, a nonamethylenedicarboxylic acid, a decamethylenedicarboxylic acid, an undecanedicarboxylic acid, a dodecanedicarboxylic acid, a tridecanedicarboxylic acid , a tetradecanedicarboxylic acid, a pentadecanedicarboxylic acid, a hexadecanedicarboxylic acid, a heptadecanedicarboxylic acid and an octadecanedicarboxylic acid.

Preferably, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, nonamethylenedicarboxylic acid, decamethylenedicarboxylic acid, undecanedicarboxylic acid, dodecanedicarboxylic acid, tridecanedicarboxylic acid, tetradecanedicarboxylic acid, pentadecanedicarboxylic acid, hexadecanedicarboxylic acid, heptadecanedicarboxylic acid and octadecanedicarboxylic acid are used.

In addition, as the unsaturated dicarboxylic acid, for example, a maleic acid, a fumaric acid, alkenylsuccinic acid such as 2-methylenesuccinic acid, a 2-ethylenesuccinic acid and a 2-methyleneglutaric acid are used.

These saturated or unsaturated dicarboxylic acids may be used singly or in combination of two or more.

Examples of the monoamide monocarboxylic acid include those in which a carboxyl group is amidated in the aliphatic dicarboxylic acid.

At this time, examples of the amine for amidating the carboxyl group include: aliphatic primary amines such as butylamine, amylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristylamine, palmitylamine, stearylamine and behenylamine; aliphatic secondary amines such as Dipropylamine, diisopropylamine, dibutylamine, diamylamine, dilaurylamine, monomethyllaurylamine, distearylamine, monomethylstearylamine, dimyristylamine and dipalmitylamine; aliphatic unsaturated amines such as allylamine, diallylamine, oleylamine and dioleylamine; alicyclic amines such as cyclopropylamine, cyclobutylamine, cyclopentylamine and cyclohexylamine; and aromatic amines such as aniline, methylaniline, ethylaniline, benzylamine, dibenzylamine, diphenylamine and α-naphthylamine.

Among them, hexylamine, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristylamine, palmitylamine, stearylamine, behenylamine, dibutylamine, diamylamine, monomethyllaurylamine, monomethylstearylamine and oleylamine are preferably used.

As the calcium complex soap thickener, a commercially available product can be used.

In addition, a calcium complex soap obtained by adding an aliphatic dicarboxylic acid and a monoamide monocarboxylic acid to a non-fluorine-based base oil, carrying out heating and stirring at a temperature at which stirring is possible can also be used, and the reaction proceeds efficiently the base oil does not deteriorate (for example, about 80 ° C to 180 ° C), and adding calcium hydroxide thereto.

The calcium complex soap thickener is preferably used in an amount of 0.3 mass% to 3 mass% based on the total amount of the fat composition.

<Calcium soap thickener, barium soap thickener, magnesium soap thickener and sodium soap thickener>

A metal salt of an aliphatic monocarboxylic acid, i. a calcium salt, a barium salt, a magnesium salt or a sodium salt of an aliphatic monocarboxylic acid may be used as the calcium soap thickener, the barium soap thickener, the magnesium soap thickener and the sodium soap thickener.

The aliphatic carboxylic acid can be linear, branched, saturated and unsaturated, and generally fatty acids can be with about 2 to 30 Carbon atoms are used, for example 12 to 24 Carbon atoms. A specific example thereof includes: saturated fatty acids such as butyric acid, a caproic acid, a caprylic acid, a pelargonic acid, a capric acid, a lauric acid, a myristic acid, a palmitic acid, a stearic acid and a behenic acid; and unsaturated fatty acids such as oleic acid, linoleic acid, lysic acid and ricinoleic acid (ricinoleic acid).

Among them, a calcium salt, a barium salt, a magnesium salt, a sodium salt of stearic acid, lauric acid and ricinoleic acid may be used as representative examples of the calcium soap thickener, the barium soap thickener, the magnesium soap thickener and the sodium soap thickener.

Commercially available products of calcium soap thickener, barium soap thickener, magnesium soap thickener and sodium soap thickener can be suitably used.

The calcium soap thickener is preferably used in an amount of 0.3 mass% to 3 mass% based on the total amount of the fat composition.

In addition, with respect to the barium soap thickener, the magnesium soap thickener and the sodium soap thickener, the barium soap thickener is preferably used in an amount of 0.6 mass% to 3.6 mass% based on the total amount of the grease composition; the magnesium soap thickener is preferably used in an amount of 0.6 mass% to 3.6 mass% based on the total amount of the fat composition; and the sodium soap thickener is preferably used in an amount of 0.6 mass% to 3.6 mass% based on the total amount of the fat composition.

<Other additives>

In addition to the above-mentioned essential ingredients, the fat composition may contain additives commonly used in the fat composition, if necessary, in a range which does not hinder the effects of the present invention.

Examples of the additives include an antioxidant, a high pressure agent, a metal deactivator, an antifriction agent, a rust inhibitor, an oiliness improver, a viscosity index improver, and a thickening agent.

In the case that the other additives are contained, the amount (total amount) of the additives is generally 0.1% by mass to 10% by mass based on the total amount of the fat composition.

Examples of the antioxidant include: hindered phenol antioxidants such as octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis [3- (3,5-di-t-butyl-4 -hydroxyphenyl) propionate], 2,4-bis (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, 1,3,5- Trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, triethylene glycol bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate], 1, 6-hexanediol bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,2-thio-diethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl ) propionate] and N, N'-hexamethylenebis (3,5-di-t-butyl-4-hydroxyhydrocinnamide); Phenol-based antioxidants such as 2,6-di-t-butyl-4-methylphenol and 4,4-methylenebis (2,6-di-t-butylphenol); Amine-based antioxidants such as triphenylamine, phenyl-α-naphthylamine, alkylated phenyl-a-naphthylamine, phenothiazine and alkylated phenothiazine.

Examples of the extreme pressure agent include: phosphorus compounds such as phosphate ester, phosphite ester and phosphate ester salt; Sulfur compounds such as sulfides and disulfides; chlorinated compounds such as chlorinated paraffin and chlorinated diphenyl; and metal salts of a sulfur compound such as zinc dialkyldithiophosphate and molybdenum dialkyl dithiocarbamate.

Examples of the metal deactivator include benzotriazole and sodium nitrite.

Examples of the antiwear agent include tricresyl phosphate and polymer esters.
Examples of the polymer ester include esters of aliphatic monohydric carboxylic acids and dibasic carboxylic acids with polyhydric alcohols. Specific examples of the polymer esters include, but are not limited to, a PRIOLUBE series (registered trademark) manufactured by Croda Japan KK.

The fat composition of the present invention can be obtained by mixing the above-mentioned various base oils and various thickening agents in a predetermined ratio and optionally adding further additives.
The fat composition may also be prepared by mixing three kinds of fats, ie, a fluorine-based grease containing a fluorine-based base oil and a fluorine-based thickener, a urea-based grease containing a non-fluorine-based base oil and a urea-based thickening agent and a soap-based grease (a calcium complex soap grease, a calcium soap grease, a barium soap grease, a magnesium soap grease or a sodium soap grease), a non-fluorine base oil and a soap-based thickener (a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener or a sodium soap thickener ) contains, if desired, with other additives. Optionally, the fat composition may also be prepared by mixing one or two of the above base fats with the remaining base oil and thickener and, if desired, other additives.

Typically, the thickening agent content based on the base grease is about 10 mass% to 30 mass%. For example, in the three types of base fats, the content of each thickener based on the respective base fat is as follows: fluorine-based thickener: 15 mass% to 30 mass%; Urea-based thickener: 10% by mass to 20% by mass; and soap-based thickeners (calcium complex soap thickener, calcium soap thickener, barium soap thickener, magnesium soap thickener or sodium soap thickener): 10 mass% to 20 mass%.

The rolling bearing of the present embodiment is particularly preferably used as a rolling bearing of small motors (eg, brushless motors and fan motors) of automobiles, household electric appliances, information equipment, and the like.

The invention according to the present disclosure is not limited to the embodiments and specific examples described in this specification, and various changes and modifications can be made within the scope of the technical idea described in the claims. For example, although the rolling bearing is referred to as a ball bearing in the above embodiment, the present invention is not limited thereto but may be applied to other rolling bearings such as roller bearings.

Examples

In the following the invention according to the present disclosure by examples will be described in more detail. However, the present invention is not limited thereto.

[Evaluation of fat composition]

Those in Examples 1 to 66 and Comparative Examples 1 to 51 The fat compositions to be used were prepared with the blending quantities indicated in the following tables.

The details and abbreviations of the respective components used to make the grease are as follows.

base oil

• (a1) fluorine-based base oil: linear perfluoropolyether (PFPE)
• (a2) Non-fluorine-based base oil: Synthetic oil 1, mixed oil of polyalphaolefin oil and ester oil
• (a3) Non-fluorine-based base oil: synthetic oil 1, polyalphaolefin oil

thickener

• (b1) Fluorine-based thickener: PTFE (polytetrafluoroethylene, particle size 10 μm to 25 μm
• (b2-1) Urea-based thickening agent: urea compound containing aliphatic-aromatic urea
• (b2-2) Urea-based thickening agent: urea compound containing alicyclic-aliphatic urea
• (b2-3) Urea based thickening agent: urea compound containing aliphatic urea
• (b3-1) Ca complex soap thickener: calcium complex soap of aliphatic dicarboxylic acid and monoamide monocarboxylic acid
• (b3-2) Ca soap thickener: 12OHCa soap (calcium 12 -Hydroxystearat)
• (b3-3) Ba soap thickener: 12OHBa soap (Barium 12 -Hydroxystearat)
• (b3-4) Mg soap thickener: 12OHMg soap (magnesium 12 -Hydroxystearat)
• (b3-5) Na soap thickener: 12OHNa soap (sodium) 12 -hydroxystearat)
• (b3-6) Li soap thickener: 12 ohli soap (lithium 12 -hydroxystearat)

In general, the urea-based thickening agents (b2-1 to b2-3) in an amount of 10% to 20% by mass based on the total amount of the base grease containing the urea-based thickener and the non-fluorine-based base oil , added: Synthetic oil 1 (a2). The Ca complex soap thickener (b3-1), the Ca soap thickener (b3-2), the Ba soap thickener (b3-3), the Mg soap thickener (b3-4), the Na soap thickener (b3-5) or the Li soap thickener (b3-6) is used in an amount of 10% by mass to 20% by mass based on the total amount of the base fat comprising the complex soap thickener, the Ca soap thickener, the Ba soap thickener, the Mg soap thickener, contains the Na soap thickener or the Li soap thickener and the non-fluorine base oil, added: synthetic oil 1 (a3).

Other additives, antioxidant: amine antioxidant; Extreme pressure agent: phosphorus high pressure additive

The other additives were added so that the total amount of the above-mentioned antioxidant and high pressure agent was 3 mass% based on the fat composition (total mass) of Examples and Comparative Example.

With respect to the properties of the obtained grease composition, a heat resistance test and a load resistance test were carried out using the following methods, and the acoustic properties were evaluated.

<Test Method>

Heat resistance test

The test fat composition was filled in a steel ball bearing (inner diameter 8 mm, outer diameter 22 mm, width 7 mm) to 25% to 35% of the storage volume. The ball bearing was inserted into a housing and a bias of 39 N applied from the axial direction of the outer ring. Then, a shaft was inserted into the inner diameter of the bearing and the shaft was connected to a rotating shaft of a test motor so that the inner race of the ball bearing was arranged to rotate.

Then, the housing was heated to 180 ° C, the ball bearing was rotated at a test temperature of 180 ° C and a rotational speed of 21,000 rpm for 200 hours, and then subjected to an acoustic evaluation test according to the following methods. Each test fat of Examples and Comparative Example was tested three times to obtain the average value.

Load resistance test

The test fat composition was filled in a steel ball bearing (inner diameter 8 mm, outer diameter 22 mm, width 7 mm) to 25% to 35% of the storage volume. The ball bearing was placed in a housing and a bias of 500 N applied from the axial direction of the outer ring. Then, a shaft was inserted into the inner diameter of the bearing and the shaft was connected to a rotating shaft of a test motor so that the inner race of the ball bearing was arranged to rotate.

Subsequently, the ball bearing was rotated at room temperature at a speed of 3,000 rpm for 100 hours and then subjected to an acoustic evaluation test according to the following methods. Each test fat of Examples and Comparative Example was tested three times to obtain the average value.

<Acoustic Evaluation>

The acoustic performance of the ball bearing using the test fat composition was evaluated by measuring the Anderon value of the M band (300 Hz to 1800 Hz) using an Anderon meter.

In detail, after rotating each ball bearing for a predetermined time according to the above methods under the above-described preload, temperature condition and rotational speed, the speed-dependent pickup was brought into contact with the outer circumference of the outer race of the ball bearing in the radial direction, the mechanical vibration transmitted to the outer race to calculate the Anderon value and to evaluate the acoustic power in each test according to the following criteria (maximum measurable value of the Anderon value: 50). The frequency of the M-band: 300 Hz to 1800 Hz is considered to be unpleasant to humans.

(Evaluation criteria)

• A: Der durchschnittliche Anderon-Wert ist kleiner als 15.
• N: Der durchschnittliche Anderon-Wert ist 15 oder mehr.

Under the test conditions of the examples, significant wear is observed when the Anderon value 15 or more, so less than 15 is considered suitable.

• A: The average Anderon value is less than 15 ,
• N: The average Anderon value is 15 or more.

The results are shown in Tables 1 to 9 and in 2 to 7 shown. The compounding amount in the mass% table is a value based on the total mass of the grease composition. [Table 1] Ca complex soap Mixing quantity (mass%) Example (Ca-complex soap) Comparative example (below) 1 2 3 4 5 6 7 8th 9 10 11 12 13 14 15 17 18 base oil (a1) Fluorine based 71.2 62.1 62,1 62.1 62.1 55.2 55.2 55.2 55.2 39.2 39.2 39.2 39.2 55.2 55.2 55.2 39.2 (a2) non-fluorine based 3.4 14.7 13 8.8 0.2 22.1 20.4 16.2 7.6 37.4 33.2 28.9 24.6 11.9 11.9 3.4 20.4 (a3) non-fluorine based 3.4 1.7 3.4 7.6 16.2 1.7 3.4 7.6 16.2 3.4 7.6 11.9 16.2 11.9 11.9 20.4 20.4 thickener (b1) fluorine based 17.8 15.6 15.6 15.6 15.6 13.8 13.8 13.8 13.8 9.8 9.8 9.8 9.8 13.8 13.8 13.8 9.8 (b2-1) Urea based 0.6 2.6 2.3 1.6 0.5 3.9 3.6 2.9 1.3 6.6 5.9 5.1 4.3 0.6 3.6 (b2-2) Urea based 2.1 (b2-3) Urea based 2.1 (b3-1) Ca complex soap 0.6 0.3 0.6 1.3 2.4 0.3 0.6 1.3 2.9 0.6 1.3 2.1 2.9 2.1 2.1 3.6 3.6 (b3-2) Ca soap (b3-3) Ba soap (b3-4) Mg soap (b3-5) Na soap (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance evaluation Anderon value 8.5 8.2 8.5 9.4 10 6.5 6.8 4.3 6.0 2.0 2.5 3.0 4.0 5.5 4.8 30 21 determination A A A A A A A A A A A A A A A N N Load resistance rating Anderon value 9.5 14 10.4 9.5 5.2 12 9.4 4.3 6.0 8.0 3.0 2.0 2.0 5.5 4.8 3.0 13 determination A A A A A A A A A A A A A A A A A [Table 2] Ca soap Mixing quantity (mass%) Example (Ca-soap) Comparative example (below) 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 22 23 base oil (a1) Fluorine based 71.2 62,1 62,1 62,1 62,1 55.2 55.2 55.2 55.2 39.2 39.2 39.2 39.2 55.2 55.2 55.2 39.2 (a2) non-fluorine based 3.4 14.7 13 8.8 0.2 22.1 20.4 16.2 7.6 39.1 37.4 33.2 24.6 11.9 11.9 3.4 20.4 (a3) non-fluorine based 3.4 1.7 3.4 7.6 16.2 1.7 3.4 7.6 16.2 1.7 3.4 7.6 16.2 11.9 11.9 20.4 20.4 thickener (b1) fluorine based 17.8 15.6 15.6 15.6 15.6 13.8 13.8 13.8 13.8 9.8 9.8 9.8 9.8 13.8 13.8 13.8 9.8 (b2-1) Urea based 0.6 2.6 2.3 1.6 0.5 3.9 3.6 2.9 1.3 6.9 6.6 5.9 4.3 0.6 3.6 (b2-2) Urea based 2.1 (b2-3) Urea based 2.1 (b3-1) Ca complex soap (b3-2) Ca soap 0.6 0.3 0.6 1.3 2.4 0.3 0.6 1.3 2.9 0.3 0.6 1.3 2.9 2.1 2.1 3.6 3.6 (b3-3) Ba soap (b3-4) Mg soap (b3-5) Na soap (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 14 7.2 7.5 9 10 9.4 12 7.8 9.5 9 9.5 10 12 4.5 5.8 25 20 determination A A A A A A A A A A A A A A A N N Load resistance rating Anderon value 10.4 12 9.5 8th 5 14 14 3.2 8.2 11 8.5 9.2 9.6 5.2 5.3 7.8 11 determination A A A A A A A A A A A A A A A A A [Table 3] Ba soap Mixing quantity (mass%) Comparative Example (hereinafter referred to) Example (Ba soap) Comparative example (below) 26 27 28 31 32 33 34 35 36 37 38 39 40 41 42 29 30 base oil (a1) Fluorine based 55.2 62,1 39.2 71.2 62,1 62,1 62,1 55.2 55.2 55.2 55.2 39.2 39.2 39.2 39.2 39.2 39.2 (a2) non-fluorine based 22.1 14.7 39.1 3.4 13 8.8 0.2 20.4 16.2 7.6 3.4 37.4 33.2 24.6 20.4 16.6 10.2 (a3) non-fluorine based 1.7 1.7 1.7 3.4 3.4 7.6 16.2 3.4 7.6 16.2 20.4 3.4 7.6 16.2 20.4 24.2 30.6 thickener (b1) fluorine based 13.8 15.6 9.8 17.8 15.6 15.6 15.6 13.8 13.8 13.8 13.8 9.8 9.8 9.8 9.8 9.8 9.8 (b2-1) Urea based 3.9 2.6 6.9 0.6 2.3 1.6 0.5 3.6 2.9 1.3 0.6 6.6 5.9 4.3 3.6 2.9 1.8 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap (b3-2) Ca soap (b3-3) Ba soap 0.3 0.3 0.3 0.6 0.6 1.3 2.4 0.6 1.3 2.9 3.6 0.6 1.3 2.9 3.6 4.3 5.4 (b3-4) Mg soap (b3-5) Na soap (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 7.2 5.5 4.3 5.5 6.5 8th 7 6 5.2 2.5 5 4.8 4.4 5.4 6.5 16 50 determination A A A A A A A A A A A A A A A N N Load resistance rating Anderon value 18 16 16 4 6 6.5 7 5 2.5 4 4.5 7.0 6.6 5.2 6 5.5 5.5 determination N N N A A A A A A A A A A A A A A [Table 4] Mg soap Mixing quantity (mass%) Comparative Example (hereinafter referred to) Example (Mg soap) Comparative example (below) 33 34 35 43 44 45 46 47 48 49 50 51 52 53 54 36 37 base oil (a1) Fluorine based 55.2 62,1 39.2 71.2 62,1 62,1 62,1 55.2 55.2 55.2 55.2 39.2 39.2 39.2 39.2 39.2 39.2 (a2) non-fluorine based 22.1 14.7 39.1 3.4 13 8.8 0.2 20.4 16.2 7.6 3.4 37.4 33.2 24.6 20.4 16.6 10.2 (a3) non-fluorine based 1.7 1.7 1.7 3.4 3.4 7.6 16.2 3.4 7.6 16.2 20.4 3.4 7.6 16.2 20.4 24.2 30.6 thickener (b1) fluorine based 13.8 15.6 9.8 17.8 15.6 15.6 15.6 13.8 13.8 13.8 13.8 9.8 9.8 9.8 9.8 9.8 9.8 (b2-1) Urea based 3.9 2.6 6.9 0.6 2.3 1.6 0.5 3.6 2.9 1.3 0.6 6.6 5.9 4.3 3.6 2.9 1.8 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap (b3-2) Ca soap (b3-3) Ba soap (b3-4) Mg soap 0.3 0.3 0.3 0.6 0.6 1.3 2.4 0.6 1.3 2.9 3.6 0.6 1.3 2.9 3.6 4.3 5.4 (b3-5) Na soap (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 9.5 4.5 4 6.5 5 6 4.5 6.5 4.5 4.5 9 4.6 5.5 6.5 8th 18 50 determination A A A A A A A A A A A A A A A N N Load resistance rating Anderon value 17 20 17 5 6 7 7 7.5 7.8 3 6.0 8th 6.5 6.5 6 6.5 7 determination N N N A A A A A A A A A A A A A A [Table 5] Na soap Mixing quantity (mass%) Comparative Example (hereinafter referred to) Example (Na soap) Comparative example (below) 40 41 42 55 56 57 58 59 60 61 62 63 64 65 66 43 44 base oil (a1) Fluorine based 55.2 62,1 39.2 71.2 62,1 62,1 62,1 55.2 55.2 55.2 55.2 39.2 39.2 39.2 39.2 39.2 39.2 (a2) non-fluorine based 22.1 14.7 39.1 3.4 13 8.8 0.2 20.4 16.2 7.6 3.4 37.4 33.2 24.6 20.4 16.6 10.2 (a3) non-fluorine based 1.7 1.7 1.7 3.4 3.4 7.6 16.2 3.4 7.6 16.2 20.4 3.4 7.6 16.2 20.4 24.2 30.6 thickener (b1) fluorine based 13.8 15.6 9.8 17.8 15.6 15.6 15.6 13.8 13.8 13.8 13.8 9.8 9.8 9.8 9.8 9.8 9.8 (b2-1) Urea based 3.9 2.6 6.9 0.6 2.3 1.6 0.5 3.6 2.9 1.3 0.6 6.6 5.9 4.3 3.6 2.9 1.8 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap (b3-2) Ca soap (b3-3) Ba soap (b3-4) Mg soap (b3-5) Na soap 0.3 0.3 0.3 0.6 0.6 1.3 2.4 0.6 1.3 2.9 3.6 0.6 1.3 2.9 3.6 4.3 5.4 (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 6.8 2.5 3.1 7 3 3 4 6.5 7.2 4.5 7.5 3.5 3.8 4.2 7 20 50 determination A A A A A A A A A A A A A A A N N Load resistance rating Anderon value 17 18 18 7 6 5 6 5.5 6.2 6 5.8 7 7.4 5.2 6 7.5 7.5 determination N N N A A A A A A A A A A A A A A [Table 6] Mixing quantity (mass%) Comparative example (one kind) Comparative Example (two types) 1 2 3 4 5 6 7 8th 9 10 11 12 13 base oil (a1) Fluorine based 77.6 62,1 54.7 39.2 (a2) non-fluorine based 82.4 82.4 82.4 16.4 24.2 40.8 (a3) non-fluorine based 82.4 82.4 82.4 82.4 82.4 82.4 thickener (b1) fluorine based 19.4 15.6 13.8 9.8 (b2-1) Urea based 14.6 2.9 4.3 7.2 (b2-2) Urea based 14.6 (b2-3) Urea based 14.6 (b3-1) Ca complex soap 14.6 (b3-2) Ca soap 14.6 (b3-3) Ba soap 14.6 (b3-4) Mg soap 14.6 (b3-5) Na soap 14.6 (b3-6) Li soap 14.6 additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance evaluation Anderon value 8.0 32 30 35 50 50 50 50 50 50 6 6.3 4 determination A N N N N N N N N N A A A Load resistance rating Anderon value 50 1.3 1.4 1.2 1.5 7.8 2.5 6.0 3.5 3.2 50 50 20 determination N A A A A A A A A A N N N [Table 7] Mixing quantity (mass%) Comparative Example (Ca complex soap) Comparative Example (Ca soap) Comparative Example (Ba Soap) 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 base oil (a1) Fluorine based 62,1 54.7 39.2 55.2 39.2 62,1 54.7 39.2 55.2 39.2 54.7 62,1 55.2 62,1 39.2 39.2 39.2 (a2) non-fluorine based 3.4 20.4 3.4 20.4 22.1 14.7 39.1 16.6 10.2 (a3) non-fluorine based 16.4 24.2 40.8 20.4 20.4 16.4 24.2 40.8 20.4 20.4 24.2 16.4 1.7 1.7 1.7 24.2 30.6 thickener (b1) fluorine based 15.6 13.8 9.8 13.8 9.8 15.6 13.8 9.8 13.8 9.8 13.8 15.6 13.8 15.6 9.8 9.8 9.8 (b2-1) Urea based 0.6 3.6 0.6 3.6 3.9 2.6 6.9 2.9 1.8 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap 2.9 4.3 7.2 3.6 3.6 (b3-2) Ca soap 2.9 4.3 7.2 3.6 3.6 (b3-3) Ba soap 4.3 2.9 0.3 0.3 0.3 4.3 5.4 (b3-4) Mg soap (b3-5) Na soap (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 18 50 45 30 21 16 50 50 25 20 25 20 7.2 5.5 4.3 16 50 determination N N N N N N N N N N N N A A A N N Load resistance rating Anderon value 6 3.0 3 3.0 13 6 7.0 5 7.8 11 1.6 9 18 16 16 5.5 5.5 determination A A A A A A A A A A A A N N N A A [Table 8] Mixing quantity (mass%) Comparative Example (Mg Soap) Comparative Example (Na Soap) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 base oil (a1) Fluorine based 54.7 62,1 55.2 62,1 39.2 39.2 39.2 54.7 62,1 55.2 62,1 39.2 39.2 39.2 (a2) non-fluorine based 22.1 14.7 39.1 16.6 10.2 22.1 14.7 39.1 16.6 10.2 (a3) non-fluorine based 24.2 16.4 1.7 1.7 1.7 24.2 30.6 24.2 16.4 1.7 1.7 1.7 24.2 30.6 thickener (b1) fluorine based 13.8 15.6 13.8 15.6 9.8 9.8 9.8 13.8 15.6 13.8 15.6 9.8 9.8 9.8 (b2-1) Urea based 3.9 2.6 6.9 2.9 1.8 3.9 2.6 6.9 2.9 1.8 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap (b3-2) Ca soap (b3-3) Ba soap (b3-4) Mg soap 4.3 2.9 0.3 0.3 0.3 4.3 5.4 (b3-5) Na soap 4.3 2.9 0.3 0.3 0.3 4.3 5.4 (b3-6) Li soap additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance rating Anderon value 50 25 9.5 4.5 4 18 50 18 20 6.8 2.5 3.1 20 50 determination N N A A A N N N N A A A N N Load resistance rating Anderon value 6.0 8th 17 20 17 6.5 7 2.0 7 17 18 18 7.5 7.5 determination A A N N N A A A A N N N A A [Table 9] Mixing quantity (mass%) Comparative Example (Li Soap) 45 46 47 48 49 50 51 base oil (a1) Fluorine based 54.7 55.2 55.2 55.2 55.2 55.2 55.2 (a2) non-fluorine based 22.1 20.4 16.2 11.9 7.6 3.4 (a3) non-fluorine based 24.2 1.7 3.4 7.6 11.9 16.2 20.4 thickener (b1) fluorine based 13.8 13.8 13.8 13.8 13.8 13.8 13.8 (b2-1) Urea based 3.9 3.6 2.9 2.1 1.3 0.6 (b2-2) Urea based (b2-3) Urea based (b3-1) Ca complex soap (b3-2) Ca soap (b3-3) Ba soap (b3-4) Mg soap (b3-5) Na soap (b3-6) Li soap 4.3 0.3 0.6 1.3 2.1 2.9 3.6 additive 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Heat resistance evaluation Anderon value 50 9.5 11 30 32 30 35 determination N A A N N N N Load resistance rating Anderon value 50 50 50 50 50 50 50 determination N N N N N N N

As described above 2 the results of the respective Anderon values of M-band after the heat resistance and load resistance test for fat compositions (Examples 1 to 15, Comparative Examples 11 to 13 , Comparative Example 15 , Comparative Example 17 and Comparative Example 18 ) in which the content of a fluorine-based thickener is 17.8 mass% to 9.8 mass% (mixing amount of the fluorine-based grease based on the total amount of the grease composition: 90 mass% to 49 mass%), the content the urea-based thickener is 0% by mass to 7.2% by mass (blending amount of the urea-based fat: 0% by mass to 48% by mass) and the content of the calcium complex soap thickener is 0% by mass to 4.3% by mass (Blend amount of calcium complex soap fat: 0% by mass to 29% by mass). In the in 2 The horizontal axis represents the content (% by mass) of the calcium complex soap thickening agent relative to the total amount of the fat composition, and the vertical axis represents the Anderon value of the M band after the tests. In FIG 2 The dashed line parallel to the horizontal axis indicates an Anderon value of 15, and the region indicated by the arrow parallel to the horizontal axis indicates the content range of the calcium complex soap thickener which can achieve a good acoustic property in both the load resistance test and the heat resistance test ,
As in 2 It is confirmed that when the content of the calcium complex soap thickener is in the range of 0.3 mass% to 3 mass% based on the total amount of the grease composition, both in the load resistance test (high load test: ■ (black square) in FIG 2 and the like below) as well as in the heat resistance test (high-temperature and high-speed test: ⃟ (diamond) in FIG 2 , and the like below) a good acoustic property can be achieved. To the acoustic property after the load resistance test; while the content of the calcium complex soap thickener becomes smaller than 0.3 mass%, the value of Anderon rapidly increases; on the other hand, when the content of the calcium complex soap thickener is larger than 0.3 mass%, the Anderon value is smaller than 15 and the acoustic properties are stable in a good state. To the acoustic properties after the heat resistance test; while the content of the calcium complex soap thickening agent becomes larger than 3 mass%, the value of Anderon rapidly increases; on the other hand, when the content of the calcium complex soap thickener is less than 3 mass%, the Anderon value is smaller than 15 and the acoustic properties are stable in a good state. Therefore, in both the load resistance test and the heat resistance test, good acoustic property can be obtained when the content of the calcium complex soap thickener used in combination with the fluorine-based thickener and the urea-based thickener is in the range of 0.3 mass%. to 3% by mass.

Equally shows 3 the results of the respective Anderon values of the M-band after the heat resistance test and the load resistance test for fat compositions (Examples 16 to 30, Comparative Examples 11 to 13 , Comparative Example 20 , Comparative Example 22 and Comparative Example 23 ) in which the content of the calcium soap thickener based on the total amount of the fat composition 0 Mass% to 4.3 mass% (blending amount of the calcium soap fat based on the total amount of the fat composition: 0 mass% to 29 mass%). In the in 3 The horizontal axis represents the content (% by mass) of the calcium soap thickening agent relative to the total amount of the fat composition, and the vertical axis represents the Anderon value of the M-band after the tests. In FIG 3 The broken line attached parallel to the horizontal axis indicates an Anderon value of 15, and the area indicated by the arrows parallel to the horizontal axis indicates the content range of the calcium soap thickener which is a good acoustic property in both the load resistance test and the heat resistance test can reach.

4 Fig. 14 shows the results of the respective Anderon values of the M-band after the heat resistance test and the load resistance test for fat compositions (Examples 31 to 42, Comparative Examples 11 to 13 , Comparative Example 24 and comparative examples 26 to 30 ) in which the content of the barium soap thickener based on the total amount of the fat composition is in the range of 0% by mass to 5.4% by mass (blending amount of the barium soap fat based on the total amount of the fat composition: 0% by mass to 36% by mass ). In the in 4 In the diagram shown, the horizontal axis represents the content (mass%) of the barium soap thickening agent with respect to the total amount of the fat composition, and the vertical axis represents the Anderon value of the M-band after the tests 4 The dashed line parallel to the horizontal axis indicates an Anderon value of 15 and the region indicated by the arrow parallel to the horizontal axis indicates the content range of the barium soap thickener which can achieve a good acoustic property in both the load resistance test and the heat resistance test.

5 Fig. 14 shows the results of the respective Anderon values of the M-band after the heat resistance test and the load resistance test for fat compositions (Examples 43 to 54, Comparative Examples 11 to 13 , Comparative Example 31 and comparative examples 33 to 37 ) in which the content of the magnesium soap thickener based on the total amount of the grease composition is in the range of 0 mass% to 5.4 mass% (blending amount of the magnesium soap fat based on the total amount of the fat composition: 0% by mass to 36% by mass). In the in 5 The horizontal axis represents the content (% by mass) of the magnesium soap thickener based on the total amount of the grease composition, and the vertical axis represents the Anderon value of the M band after the tests. In FIG 5 The dashed line parallel to the horizontal axis indicates an Anderon value of 15 and the area indicated by the arrow parallel to the horizontal axis indicates the content range of the magnesium soap thickener which can achieve good acoustic characteristics in both the load resistance test and the heat resistance test.

6 Fig. 14 shows the results of the respective Anderon values of the M-band after the heat resistance test and the fatigue strength test for fat compositions (Examples 55 to 66, Comparative Examples 11 to 13 , Comparative Example 38 and comparative examples 40 to 44 ) in which the content of the sodium soap thickener based on the total amount of the fat composition is in the range of 0% by mass to 5.4% by mass (mixing amount of the sodium soap fat based on the total amount of the fat composition: 0% by mass to 36% by mass ). In the in 6 The horizontal axis represents the content (% by mass) of the sodium soap thickening agent with respect to the total amount of the fat composition, and the vertical axis represents the Anderon value of the M ribbon after the tests. In FIG 6 The dashed line parallel to the horizontal axis indicates an Anderon value of 15, and the region indicated by the arrow parallel to the horizontal axis indicates the content range of the sodium soap thickener which can achieve good acoustic characteristics in both the load resistance test and the heat resistance test.

As in 3 to 6 It is confirmed that a good acoustic property is obtained in both the load resistance test and the heat resistance test when, based on the total amount of the fat composition, the content of the calcium soap thickener is between 0.3 mass% and 3 mass% Content of the barium soap thickener is between 0.6 mass% and 3.6 mass%, the content of the magnesium soap thickener is between 0.6 mass% and 3.6 mass%, and the content of the sodium soap thickener is between 0.6 mass% and 3.6 mass%. The acoustic property shows the same tendency as the acoustic property of the fatty acid composition using the calcium complex soap thickener 2 ,

In contrast, shows 7 the results of the respective Anderon values of the M-band after the heat resistance test and the load resistance test for fat compositions (Comparative Example 11 to Comparative Example 13 and Comparative Example 45 to Comparative Example 51 ) in which the content of the lithium soap thickener based on the total amount of the grease composition is in the range of 0% by mass to 4.3% by mass (mixing amount of lithium soap fat based on the total amount of the grease composition: 0% by mass to 29% by mass ). In the in 7 As shown in the graph, the horizontal axis represents the content (% by mass) of the lithium soap thickener based on the total amount of the grease composition, and the vertical axis represents the Anderon value of the M band after the tests 7 The dotted line parallel to the horizontal axis indicates an Anderon value of 15.

As in 7 It is confirmed that when using the lithium soap thickener as a thickener in combination with the above-mentioned thickening agents, the acoustic property of the load resistance test deteriorates and the acoustic property of the heat resistance test also deteriorates with increasing content of the lithium soap thickener. To the acoustic properties after the stress test; the Anderon value remains higher than 15 regardless of the content of the lithium soap thickener. Moreover, for the acoustic properties after the heat resistance test, when the content of the lithium soap thickener is less than 0.6 mass%, the Anderon value is smaller than 15 but when the content of the lithium soap thickener is larger than 0.6 mass%, Accordingly, it is confirmed that in the use of the fluorine-based thickener and the urea-based thickener in combination with the lithium soap thickener, a good acoustic property can not be obtained either in the load resistance test or the heat resistance test.

As a result of the tests, in a fat composition containing the fluorine-based thickener, the urea-based thickener and the calcium complex soap thickener in a certain ratio, i. a fat composition containing 9% to 18% by mass of the fluorine-based thickener, 0.5% to 7% by mass of the urea-based thickener, and 0.3% to 3% by mass of the calcium complex soap thickener the total amount of the fat composition shown in Table 1, the average Anderon value less than 15, and the acoustic performance are both in the heat resistance test (180 ° C, 21,000 rpm, bias: 39 N, 200 hours spin) and in the load resistance test (Room temperature, 3,000 rpm, preload: 500 N, turn 100 hours) well.

Similarly, the results show that in a fat composition containing 9% to 18% by mass of the fluorine-based thickener, 0.5% to 7% by mass of the urea-based thickener and 0.3% to 3% by weight % of the calcium soap thickening agent, based on the total amount of the fat composition, as shown in Table 2; a fat composition containing 9% to 18% by mass of the fluorine-based thickener, 0.5% to 7% by mass of the urea-based thickener, and 0.6% to 3.6% by mass of the barium soap thickening agent the total amount of the fat composition as shown in Table 3; a fat composition containing 9% to 18% by mass of the fluorine-based thickener, 0.5% to 7% by mass of the urea-based thickener, and 0.6% to 3.6% by mass of the urea-based thickener Magnesium soap thickening agent based on the total amount of the fat composition as shown in Table 4; and a fat composition containing 9 mass% to 18 mass% of the fluorine-based thickener, 0.5 mass% to 7 mass% of the urea-based thickener and 0.6 mass% to 3.6 mass% of the sodium soap thickener, based on the total amount of the fat composition as shown in Table 5, the average Anderon value is less than 15 and the acoustic performance is good in each of the above-mentioned heat resistance test and load resistance test.

On the other hand, when only one kind of thickening agent is contained, the acoustic performance in connection with the load resistance deteriorates (Comparative Example 1 to Comparative Example 10 ) when only a fluorine-based thickener is contained (Comparative Example 1 ), and the acoustic performance associated with heat resistance deteriorates when only a urea-based thickener is contained (Comparative Example 2 to Comparative Example 4 ) or only a soap-based thickener is contained (Comparative Example 5 to Comparative Example 10 ).

Moreover, when only a fluorine-based thickener and a urea-based thickener without a soap-based thickener are contained (Comparative Example 11 to Comparative Example 13 ), the heat resistance is good, but the acoustic performance associated with the load resistance deteriorates.

Further, when a fluorine-based thickener and a calcium complex soap thickener without a urea-based thickener are contained (Comparative Example 14 to Comparative Example 16 ), a fluorine-based thickener and a calcium soap thickener without a urea-based thickener are contained (Comparative Example 19 to Comparative Example 21 ), a fluorine-based thickener and a barium soap thickener without a urea-based thickener are included (Comparative Example 24 and Comparative Example 25 ), a fluorine-based thickener and a magnesium soap thickener without a urea-based thickener are included (Comparative Example 31 and Comparative Example 32 ), or a fluorine-based thickener and a sodium soap thickener without a urea-based thickener are included (Comparative Example 38 and Comparative Example 29 ), the load resistance is good, but the acoustic performance associated with the heat resistance deteriorates (see Table 7 and Table 8).

In addition, in the case where three kinds of thickening agents are contained, ie, a fluorine-based thickener, a urea-based thickener and a soap-based thickener, and when the blending amount of the calcium complex soap thickener is outside (greater than) the range specified by the present invention (Comparative example 17 and Comparative Example 18 ), the blending amount of the calcium soap thickener is too large (Comparative Example 22 and Comparative Example 23 ), the blending amount of the barium soap thickener is too large (Comparative Example 29 and Comparative Example 30 ), the blending amount of the magnesium soap thickener is too large (Comparative Example 36 and Comparative Example 37 ), or the blending amount of the sodium soap thickener is too large (Comparative Example 43 and Comparative Example 44 ), the load resistance is good, but the acoustic performance associated with the heat resistance deteriorates. On the other hand, even in the case where three kinds of thickening agents are contained, and when the mixing amount of the barium soap thickener is outside (smaller than) the range determined by the present invention (Comparative Example 26 to Comparative Example 28 ), the blending amount of the magnesium soap thickener is too small (Comparative Example 33 to Comparative Example 35 ), or the blending amount of the sodium soap thickener is too small (Comparative Example 40 to Comparative Example 42 ), the heat resistance is good, but the acoustic performance associated with the load resistance deteriorates (see Table 7 and Table 8).

When a lithium soap thickener is used in combination as a soap-based thickener (Comparative Example 45 to Comparative Example Comparative Example 51 ), the acoustic performance in connection with the load resistance deteriorates. When the blending amount of the lithium soap thickener is larger than 1.3 mass%, the acoustic performance in terms of heat resistance also deteriorates (see Table 9 and FIG 7 ).

As described above, it is confirmed that the grease composition of the present invention comprising a fluorine-based thickener, a urea-based thickener and a soap-based thickener selected from the group consisting of a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener Magnesium soap thickener and a sodium soap thickener, can prevent noise increase and have good heat resistance (high temperature high speed property) and load resistance (high load property) even when used at a high temperature condition (eg 180 ° C or higher) and at a high load condition (eg 500 N) ).

In examples, the acoustic property is evaluated using a standard small diameter ball bearing having an outer diameter of 22 mm. However, the rolling bearing to which the present disclosure is directed is not limited to this size, and the size of the rolling bearing of the present disclosure may be suitably selected, and also the type of rolling bearing may be suitably selected.

Although the best mode has been described in detail above, the present invention is not limited to the above-described embodiment, and changes, improvements and the like are possible to the extent capable of achieving the object of the invention of the present disclosure. are also included in the present invention.

This application is based on Japanese Patent Application filed on Nov. 30, 2016 ( Japanese Patent Application No. 2016-233443 ) and Japanese Patent Application filed on Nov. 15, 2017 ( Japanese Patent Application No. 2017-220393 ), the contents of which are hereby incorporated by reference.

LIST OF REFERENCE NUMBERS

G

fat composition

10

Rolling

11

inner ring

11a

Concave part

12

outer ring

12a

Concave part

13

rolling elements

14

container

15 (15 a, 15 b)

Annular sealing element

16

storage room

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 4239514 [0004]
• JP 4505954 [0004]
• JP 2016233443 [0144]
• JP 2017220393 [0144]

Claims (11)

Fat composition comprising: a fluorine-based base oil and a non-fluorine base base oil as base oils; and a fluorine-based thickener, a urea-based thickener, and at least one soap-based thickener selected from the group consisting of a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener and a sodium soap thickener as a thickener. Fat composition after Claim 1 wherein the urea-based thickener contains at least one of an aliphatic-aromatic urea, an alicyclic-aliphatic urea and an aliphatic urea. Fat composition after Claim 2 wherein the urea-based thickener contains a diurea compound represented by the following general formula (1): R ₁ -NHCONH-R ₂ -NHCONH-R ₃ (1) (In the formula, R ₁ and R ₃ each independently represent a monovalent aliphatic hydrocarbon group, a monovalent alicyclic hydrocarbon group or a monovalent aromatic hydrocarbon group, and at least one of R ₁ and R ₃ represents a monovalent aliphatic hydrocarbon group or a monovalent alicyclic hydrocarbon group, and R ₂ represents a divalent aromatic hydrocarbon group). Fat composition according to one of Claims 1 to 3 comprising 70 mass% to 90 mass% of a total amount of the fluorine-based base oil and the non-fluorine base oil, 9 mass% to 18 mass% of the fluorine-based thickener, 0.5 mass% to 7 mass% the urea-based thickener and 0.3 mass% to 3 mass% of the calcium complex soap thickening agent, based on a total amount of the grease composition. Fat composition after Claim 4 wherein the calcium complex soap thickener is a calcium complex soap of an aliphatic dicarboxylic acid and a monoamide monocarboxylic acid. Fat composition according to one of Claims 1 to 3 comprising, based on a total amount of the fat composition, from 70% to 90% by mass of a total amount of the fluorine-based base oil and the non-fluorine-based base oil; 9% by mass to 18% by mass of the fluorine-based thickener; From 0.5% to 7% by mass of the urea-based thickener; and 0.3 mass% to 3 mass% of the calcium soap thickener. Fat composition according to one of Claims 1 to 3 comprising, based on a total amount of the fat composition, from 70% to 90% by mass of a total amount of the fluorine-based base oil and the non-fluorine-based base oil; 9% by mass to 18% by mass of the fluorine-based thickener; From 0.5% to 7% by mass of the urea-based thickener; and 0.6 mass% to 3.6 mass% of the barium soap thickener. Fat composition according to one of Claims 1 to 3 comprising, based on a total amount of the fat composition, 70 mass% to 90 mass% of a total amount of the fluorine-based base oil and the non-fluorine base oil; 9% by mass to 18% by mass of the fluorine-based thickener; From 0.5% to 7% by mass of the urea-based thickener; and 0.6 mass% to 3.6 mass% of the magnesium soap thickener. Fat composition according to one of Claims 1 to 3 comprising, based on a total amount of the fat composition, from 70% to 90% by mass of a total amount of the fluorine-based base oil and the non-fluorine-based base oil; 9% by mass to 18% by mass of the fluorine-based thickener; From 0.5% to 7% by mass of the urea-based thickener; and 0.6 mass% to 3.6 mass% of the sodium soap thickening agent. Fat composition according to one of Claims 1 to 9 wherein the non-fluorine-based base oil is one or more selected from the group consisting of a hydrocarbon-based synthetic oil, an ether-based synthetic oil, an ester-based synthetic oil, and a silicone-based synthetic oil. Rolling bearing, which with the fat composition according to one of Claims 1 to 10 is filled.

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