WO2006112082A1

WO2006112082A1 - Lubricant composition

Info

Publication number: WO2006112082A1
Application number: PCT/JP2005/022447
Authority: WO
Inventors: Atsuki Sugahara; Yukio Miura
Original assignee: Sun Corporation Co., Ltd.
Priority date: 2005-04-14
Filing date: 2005-12-07
Publication date: 2006-10-26
Also published as: CN101163782A; JP2006291142A

Abstract

Disclosed is a lubricant composition containing a lubricant base oil and at least one additive selected from the group consisting of organic metals and metal salts. By having such a constitution, the lubricant composition enables compressors, internal combustion engines or the like to reduce power or fuel consumption when used therein, while enhancing the cooling efficiency and suppressing decrease of output.

Description

Specification

Lubricant composition

Technical field

[0001] The present invention relates to a lubricant composition.

Background art

[0002] Lubricant compositions containing oil are used in compressors, internal combustion engines, and the like that compress refrigerant (for example, Freon gas). In this compressor, internal combustion engine, etc., it is possible to control the rotational torque by adjusting the viscosity and compatibility with the refrigerant by changing the characteristics of the lubricant composition.

[0003] In such a lubricant composition, a compressor or internal combustion engine of a product at the time of shipment is generally filled with a dedicated lubricant composition suitable for the characteristics of the product. Also, when maintenance is performed in the process of use or when a unit is replaced in the event of a failure, commercially available general-purpose oil that is suitable for the product is often used.

[0004] However, when commercially available general-purpose oil is used, the general-purpose oil and the oil contained in the dedicated lubricant composition are mixed, resulting in metal wear inside the compressor, internal combustion engine, etc. Loss increases. In addition, when used in a refrigerator, the mixed oil also acts on the lubrication of the sliding parts of the compressor, causing seizure. Therefore, the life of the equipment is shortened and the original performance of the equipment cannot be fully exhibited.

[0005] On the other hand, a lubricating oil has been disclosed that eliminates compressor trouble by using commercially available oil and blending a commercially available lubricant / additive and ultrafine ceramics (for example, Patent Document 1). reference).

Patent Document 1: JP-A-10-195470

Disclosure of the invention

Problems to be solved by the invention

[0006] However, the lubricating oil described in Patent Document 1 described above has the following problems. [0007] That is, the lubricating oil does not have sufficient economic efficiency due to a large loss of electric power and fuel consumption during the operation of the compressor due to internal friction of the compressor and internal combustion engine.

[0008] On the other hand, when an additive for reducing friction is added to the lubricating oil described in Patent Document 1, it is possible to reduce friction.

However, as the friction is reduced, the efficiency of compressing the refrigerant when lubricating oil is used in a compressor or the like tends to decrease, so that the output generated by the internal combustion engine or the like decreases. As economic efficiency is not enough.

[0010] The present invention has been made in view of the above circumstances, and can reduce power and fuel consumption when used in a compressor, an internal combustion engine, and the like, further increase cooling efficiency and suppress a decrease in generated output. It is an object of the present invention to provide a lubricant composition.

Means for solving the problem

In order to solve the above problems, the present invention provides a lubricant composition containing a lubricating base oil and at least one additive selected from the group consisting of an organic metal and a metal salt.

[0012] The lubricant composition of the present invention contains a lubricating base oil and at least one additive selected from the group consisting of an organic metal and a metal salt, so that it is lubricated when used in a compressor, an internal combustion engine, or the like. The friction between the agent composition and the metal surface of the internal combustion engine or the like can be reduced, and the efficiency of compressing the refrigerant can be improved. Therefore, it is possible to suppress the rotational torque, reduce the power and fuel consumption, increase the cooling efficiency, and suppress the decrease in generated output. It is also possible to silence vibrations and noise from compressors and internal combustion engines.

[0013] From this fact, according to the lubricant composition of the present invention, the emission amount of carbon dioxide that promotes global warming can be reduced.

[0014] Although the reason why the lubricant composition of the present invention can reduce electric power and fuel consumption, further increase the cooling efficiency and suppress the decrease in generated output is not clear, the lubricant composition can be used as a compressor, When used in an internal combustion engine or the like, if the additive contained in the lubricant composition is an organic metal or metal salt, a film is formed on the internal metal surface of the compressor or internal combustion engine, and the metal surface is inactivated or deactivated.ヽ is a lubricant assembly that protects the metal surface. This is thought to be because wear between the product and the metal surface is reduced, and power and fuel consumption can be reduced.

[0015] Further, when the lubricant composition is used for an internal combustion engine or the like, if the additive contained in the lubricant composition is an organic metal or a metal salt, the lubricating base oil is formed on the sliding surface inside the internal combustion engine. It is considered that the degradation product is decomposed and the decomposition product forms a film, so that the friction reduction effect can be exhibited and the decrease in the generated output can be suppressed.

[0016] Therefore, according to the lubricant composition of the present invention, in various compressors, internal combustion engines, etc., it is mixed with oil contained in the dedicated lubricant composition at the time of maintenance in the course of use or when replacing the unit at the time of failure. However, it is possible to reduce friction caused by characteristics such as a difference in viscosity and to suppress a decrease in cooling efficiency due to a difference in oil confidentiality. As a result, it is possible to sufficiently bring out the original performance of a device having a compressor, an internal combustion engine, or the like. Therefore, it is possible to obtain a general-purpose lubricant composition that is not affected by the type of the refrigerant or the compressor.

[0017] In the above-described lubricant composition, it is more preferable that the organic metal whose additive is an organic metal is a compound represented by the following general formula (1).

[Chemical 1]

[In Formula (1), R \ R ² and Oi ⁴ (represented as 1 to 1 ^ 4). The same applies hereinafter) each independently represents an alkyl group or an aryl group, and M represents a divalent metal. . ]

[0018] In this case, when used in a compressor, an internal combustion engine or the like, the friction between the lubricant composition and the metal surface of the internal combustion engine or the like can be further reduced, and the efficiency of compressing the refrigerant can be further improved. it can. Therefore, it is possible to further suppress the rotational torque, reduce power consumption and fuel consumption, increase the cooling efficiency, and further suppress the decrease in generated output.

[0019] Further, in the above-described lubricant composition, the organic metal is effective in preventing the oxidization of the lubricating base oil.

Therefore, according to the lubricant composition of the present invention, even when used for a long period of time, It can suppress that a lubricant composition changes in quality.

[0020] In the above lubricant composition, the lubricating base oil is preferably a polyol ester. If the lubricating base oil is a polyol ester, atomization efficiency or condensation effect is improved, and when used in various internal combustion engines, power and fuel consumption are further reduced, cooling efficiency is increased, and generation output is further suppressed. Can do.

[0021] Further, when a lubricant composition containing a polyol ester is used in a compressor, the polyol ester is excellent in compatibility with commonly used refrigerants, and therefore has a cooling effect as compared with a lubricating base oil other than polyol ester. Can be further increased.

[0022] The present invention provides a mixed refrigerant comprising the lubricant composition described above and a refrigerant gas. In the mixed refrigerant of the present invention, since the lubricant composition and the refrigerant gas are mixed in advance, the lubricating performance can be improved and the cooling capacity of the refrigeration equipment can be improved.

That is, according to the mixed refrigerant of the present invention, in various refrigeration equipment, the mixed refrigerant of the present invention is simply used as it is during maintenance in the process of using a compressor compressor, etc., or when replacing a unit in the event of a failure. This improves lubrication performance and improves the cooling capacity of refrigeration equipment.

[0024] In this case, since the mixed refrigerant of the present invention can be used regardless of the amount and content ratio of the remaining refrigerant gas and the dedicated lubricant composition, the working efficiency can be improved. Furthermore, it is possible to greatly reduce the cost of capital investment and design change accompanying the change of the lubricant composition to be used.

[0025] The present invention provides a lubricating oil for an internal combustion engine comprising the above-described lubricant composition. Since the lubricating oil for an internal combustion engine of the present invention contains the above-described lubricant composition, it is possible to reduce power and fuel consumption by increasing the lubricating performance of the internal combustion engine, and to suppress a decrease in generated output. Can be u.

[0026] Therefore, for example, when the lubricating oil for an internal combustion engine of the present invention is used as engine oil or an additive for engine oil, the resistance of a sliding portion such as a crankshaft is suppressed and the accelerator response is enhanced. it can. The invention's effect

[0027] According to the lubricant composition of the present invention, when used in a compressor, an internal combustion engine, etc. Power consumption and fuel consumption can be reduced, cooling efficiency can be further increased, and reduction in generated output can be suppressed.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be shown and described in detail.

[0029] [Lubricant composition]

The lubricant composition of the present invention contains a lubricating base oil and at least one additive selected from the group consisting of organic metals and metal salts.

[0030] Since the lubricant composition of the present invention contains a lubricating base oil and at least one additive selected from the group consisting of an organic metal and a metal salt, it is lubricated when used in a compressor, an internal combustion engine, or the like. The friction between the agent composition and the metal surface of the internal combustion engine or the like can be reduced, and the efficiency of compressing the refrigerant can be improved. Therefore, it is possible to suppress the rotational torque, reduce the power and fuel consumption, increase the cooling efficiency, and suppress the decrease in generated output. It is also possible to silence vibrations and noise from compressors and internal combustion engines.

[0031] Therefore, according to the lubricant composition of the present invention, it is possible to reduce the emission amount of carbon dioxide that promotes global warming.

[0032] Examples of the organic metal include potassium (methylsulfinyl) methacrylate, sodium dihydronaphthalenidyl, sodium acetylide, calcium carbide, ferrolithium, dimethylmercury, bromo (methyl) magnesium, chlorodihydridomethyltin, Chlorodiphenyl antimony

, Lithium dimethylcuprate (1-), tris (7} ³ -aryl) chromium, bis (7} ⁶ -benzene) chromium

, 1, 1, 1 dichloro ferrocene, (1-dihydroxyethyl) Huekousen, ferroceum, bis [(1, 2, 3, 3a, 7a— 7?) — 1—indul] iron , Dichlorobis (7? ⁵ —cyclopentadienyl) titanium, tetracarbol [2— (pheulacetyl) felue C, O] manganese, P] [N-methylpropanamide (2-)-C ³ , N] nickel, or a compound represented by the above general formula (1). Among these, a liquid organic metal is preferable. These organic metals can be used alone or in combination of two or more.

[0033] Examples of the metal salt include disulfurium molybdenum. [0034] Among these, it is more preferable that the organic metal whose additive is preferably an organic metal is a compound represented by the above general formula (1).

[0035] In this case, when used in a compressor, an internal combustion engine, etc., the friction between the lubricant composition and the metal surface of the internal combustion engine, etc. can be further reduced, and the efficiency of compressing the refrigerant can be further improved. it can. Therefore, it is possible to further suppress the rotational torque, reduce power consumption and fuel consumption, increase the cooling efficiency, and further suppress the decrease in generated output.

[0036] In the lubricant composition, the organic metal is also effective in preventing the oxidation of the lubricating base oil.

Therefore, according to the lubricant composition of the present invention, deterioration of the lubricant composition can be suppressed even when used for a long time.

In the general formula (1), I ^ to R ⁴ each independently represents an alkyl group or an aryl group, and M represents a divalent metal.

[0038] Examples of the alkyl group include linear, branched and cyclic hydrocarbon groups having 4 to 10 carbon atoms, and these may further have a substituent. Examples of the aryl group include a phenyl group and a naphthyl group, and these may further have a substituent. R ^{1 to} R ⁴ are preferably the same group.

[0039] Examples of the divalent metal include chromium, manganese, titanium, tantalum, cornoleto, nickel, zinc, aluminum, gallium, and molybdenum. Of these, titanium, zinc, and molybdenum are preferable. In this case, there is an advantage that it is easier to form a film on the metal surface of an internal combustion engine or the like. The above divalent metals may be used alone or in combination of two or more. In particular, it is more preferable to use a combination of the case where the divalent metal is zinc and the case of molybdenum. In this case, it becomes possible to form a two-layer coating on the internal metal surface of an internal combustion engine or the like, and the effects of the present invention can be further achieved.

[0040] The content of the additive of the present invention is preferably 0.1 parts by mass to 2 parts by mass with respect to 100 parts by mass of the lubricating base oil. When the content is less than 0.1 part by mass, the efficiency of compressing the refrigerant can be sufficiently improved when used in a compressor, an internal combustion engine, or the like, compared to the case where the content is in the above range. It tends to be difficult, and if it exceeds 2 parts by mass, the content will be Compared with the above range, sludge and the like tend to be easily formed in the lubricant composition when used in an internal combustion engine or the like.

[0041] The lubricating base oil used in the present invention is not particularly limited, and a commercially available lubricating oil may be used. Specific examples of the lubricating base oil include natural products and synthetic products. Natural products include vegetable oils such as castor oil and lard oil, animal oils and mineral oils, and synthetic products include hydrocarbons such as polybutylene, polypropylene, propylene isobutylene copolymer and chlorinated polybutylene, dodecylbenzene, tetradecyl. Aromatics such as benzene, diol benzene, di (2-ethylhexyl) benzene, biphenyl, terphel, alkylated polyphenol, alkylated diphenyl ether, alkylated diphenyl sulfide

, Alkylene oxides such as polyethylene oxide and polypropylene oxide, phthalic acid, succinic acid, maleic acid, azelaic acid, suberic acid, sebacic acid, fumaric acid, adipic acid, linoleic acid dimer, malonic acid, alkylmalonic acid, alkke Higher fatty acids such as lumalonic acid, dibutyl adipate, di (2-ethylhexyl) sebacate, dihexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, didecyl phthalate , Dieicosyl sebacate, higher fatty acid ester such as 2-ethylhexyl ester of linoleic acid dimer, butyl alcohol mononole, hexenoreanoreconole, dodecinoleanoreconole, 2-ethinorenoxenorenorecole Nore, ethylene glycol, Higher alcohols such as diethylene glycol monoether and propylene glycol, esters made from monocarboxylic acids having 5 to 12 carbon atoms and polyols, dimethylo-repronone, pen evening rims, dipen evening ridges Polyesters such as mono- and dipentyl esters, silicone-based silicone oils such as silicate oil, phosphorus-containing acids such as tricresyl phosphate, trioctyl phosphate, and decylphosphonic acid jetyl ester It is done.

[0042] It should be noted that these lubricating base oils may be included, so long as they are unrefined oils, refined oils, or re-refined oils.

[0043] Among them, it is more preferable to use a polyol ester, for which it is preferable to use a synthetic product. When the lubricating base oil is a synthetic material, when it is used for various internal combustion engines, it is possible to further reduce electric power and fuel consumption, increase cooling efficiency, and suppress a decrease in generated output. Also, When a lubricant composition comprising a lubricating base oil made of a synthetic material is used in a compressor, it is excellent in compatibility with commonly used refrigerants, so that the cooling effect can be further enhanced.

[0044] Also, among the synthetic products, when the lubricating base oil is a polyol ester, the atomization efficiency or the condensation effect is improved, and when used in various internal combustion engines, the power and fuel consumption are further reduced and the cooling efficiency is increased. A decrease in generated output can be further suppressed.

[0045] Further, when a lubricant composition containing a polyol ester is used in a compressor, the polyol ester is more compatible with a commonly used refrigerant, and therefore has a further cooling effect as compared with a composite other than the polyol ester. It becomes possible to raise.

[0046] The kinematic viscosity of the lubricant composition of the present invention is 30 X 10 "under a temperature condition of 40 ° C.

^{^{^{6m 2 Zs~60 X 10 _6 m 2}}} Zs are preferred. If the kinematic viscosity is less than 30 X 10 ^_6 m ² Zs, compared to the case where the kinematic viscosity is in the above range, the internal metal surface of the compressor or internal combustion engine, etc., when used in a compressor or internal combustion engine, etc. If the kinematic viscosity exceeds 6 OX 10 ^_6 m ² Zs, compared with the case where the kinematic viscosity is in the above range, the compressor and internal combustion engine, etc. The frictional resistance at start-up increases and power consumption tends to increase. The above kinematic viscosity at temperature conditions of ^{100 ° C, 3 X 10 _6} m 2 Zs~: It is more preferable LO X 10 ^_6 m ² Zs. In this case, the effect of the present invention can be further exhibited even at a high temperature. The kinematic viscosity was measured based on the standard ASTM D445.

[0047] The lubricant composition of the present invention may contain an auxiliary agent or the like as long as it contains the above-mentioned lubricating base oil and ultrafine particle powder. For example, water draining agent, gas leakage prevention agent, oil leakage prevention agent, preservative, anti-friction agent (antiwear agent), anti-acid agent (antioxidant), acid treatment agent, cleaning dispersant, viscosity maintenance agent ( (Clay index improver), antifoam agent (antifoaming agent), pour point improver (pour point depressant), dry film lubricant, solid lubricant, fuel additive, lubricant / antifungal agent, gas leak detector, etc. Is mentioned.

[0048] The lubricant composition of the present invention can be suitably used for refrigeration and refrigerating machines and air conditioners, automotive air conditioners, various gears, compressors, engine oils, and the like. The lubricant composition of the present invention is supplied in a form accommodated in a cylinder or a general-purpose container.

[0049] [mixed refrigerant] The mixed refrigerant of the present invention includes a lubricant composition and a refrigerant gas. Note that the lubricant composition is the same as the lubricant composition described above, and a description thereof will be omitted.

[0050] In the mixed refrigerant of the present invention, since the lubricant composition and the refrigerant gas are preliminarily mixed, the lubrication performance can be improved and the cooling capacity of the refrigeration equipment can be improved.

[0051] That is, according to the mixed refrigerant of the present invention, in various refrigeration equipment, the mixed refrigerant of the present invention is simply used as it is at the time of maintenance in the course of use of a compressor compressor or the like or when replacing a unit in the event of a failure. This improves lubrication performance and improves the cooling capacity of refrigeration equipment.

[0052] In this case, since the mixed refrigerant of the present invention can be used regardless of the amount and content ratio of the remaining refrigerant gas and the dedicated lubricant composition, the working efficiency can be improved. Furthermore, it is possible to greatly reduce the cost of capital investment and design change accompanying the change of the lubricant composition to be used.

[0053] In the mixed refrigerant of the present invention. As the refrigerant gas, CFC, HCFC, HFC, etc. can be used.

[0054] The mixed refrigerant of the present invention can be obtained by mixing the lubricant composition described above and the refrigerant gas. The mixing means at this time is performed by storing the lubricant composition in a container and injecting a liquid refrigerant into the lubricant composition.

[0055] The content of the lubricant composition in the mixed refrigerant is preferably 2 to 50 parts by mass of the lubricant composition with respect to 100 parts by mass of the mixed refrigerant. If the content of the lubricant composition is less than ^ parts by mass, compared to the case where the content of the lubricant composition is in the above range, it tends to be difficult to sufficiently suppress the decrease in generated output. Yes, if the content of the lubricant composition exceeds 50 parts by mass, it tends to be difficult to sufficiently increase the cooling efficiency compared to the case where the content of the lubricant composition is in the above range. .

[0056] In the mixed refrigerant, the refrigerant gas content is preferably 60 parts by mass to 98 parts by mass of the refrigerant gas with respect to 100 parts by mass of the mixed refrigerant. If the refrigerant gas content is less than 60 parts by mass, it is necessary due to insufficient pressure when extracting the mixed refrigerant contained in the container, as compared with the case where the refrigerant gas content is in the above range. However, if the refrigerant gas content exceeds 98 parts by mass, the refrigerant gas content increases. Compared with the case of the above range, it tends to be difficult to fully exhibit the lubricating performance of the mixed refrigerant.

[0057] Furthermore, the content ratio of the lubricant composition and the refrigerant gas in the mixed refrigerant is preferably 150 parts by mass to 4950 parts by mass of the refrigerant gas with respect to 100 parts by mass of the lubricant composition. When the content of the refrigerant gas is less than 150 parts by mass, the pressure of the mixed refrigerant contained in the container is insufficient when the refrigerant is taken out from the container as compared with the case where the content of the refrigerant gas is in the above range. Therefore, if the refrigerant gas content exceeds 4 950 parts by mass, the lubricating performance of the mixed refrigerant is higher than that when the refrigerant gas content is in the above range. It tends to be difficult to fully exhibit the above.

[0058] The mixed refrigerant of the present invention may further contain a hydrocarbon such as methane, ethane, propane, isopropane, or butane and an alcohol such as Z or methanol, ethanol, propanol, isopropanol, or butanol. Is possible.

[0059] Among these, it is preferable to include the hydrocarbon in the mixed refrigerant. In this case, there is an advantage that the atomization efficiency and the condensation efficiency are further improved. Of the above hydrocarbons, it is more preferable to use propane.

[0060] The refrigerant mixture of the present invention may be used by mixing the refrigerant mixture of the present invention itself with a lubricating base oil or the like, which may use the refrigerant mixture of the present invention as a refrigerant. Among these, from the viewpoint of cost merit, it is preferable to use a conventional refrigerant mixed with a lubricating base oil.

[0061] At this time, when the blending amount of the mixed refrigerant of the present invention is 6 parts by mass or more when the conventional refrigerant is 100 parts by mass of the lubricating base oil, the effects of the present invention can be sufficiently obtained. .

[0062] The mixed refrigerant of the present invention may contain an auxiliary agent or the like as long as it contains the refrigerant gas and the lubricant composition described above. Examples of the auxiliary agent include a gas leak prevention agent and a gas leak detection agent. The mixed refrigerant of the present invention is supplied in a form accommodated in a cylinder, a general-purpose container or the like.

[0063] [Lubricant for internal combustion engine]

The lubricating oil for internal combustion engines of the present invention contains a lubricant composition. The lubricant composition is the same as the above-described lubricant composition, and thus the description thereof is omitted.

[0064] Since the lubricating oil for an internal combustion engine of the present invention contains the lubricant composition, the internal combustion engine By improving the lubrication performance, it is possible to reduce power consumption and fuel consumption, and to suppress a decrease in generated output.

[0065] Therefore, for example, when the lubricating oil for an internal combustion engine of the present invention is used as engine oil or an additive for engine oil, resistance of a sliding portion such as a crankshaft is suppressed, and the accelerator response is enhanced. it can.

[0066] The content of the lubricant composition in the lubricating oil for internal combustion engines of the present invention is 0.1 to 2 parts by mass of the lubricant composition with respect to 100 parts by mass of the lubricating oil for internal combustion engines. It is preferable to let them. When the content of the lubricant composition is less than 0.1 parts by mass, the lubricating performance of the lubricating oil for internal combustion engines can be sufficiently exhibited as compared with the case where the content of the lubricant composition is in the above range. When the content of the lubricant composition exceeds 2 parts by mass, the lubricant composition is lubricated when used in an internal combustion engine or the like as compared with the case where the content of the lubricant composition is in the above range. There is a tendency that sludge and the like are easily formed in the agent composition.

[0067] The internal combustion engine lubricating oil of the present invention may be used as a lubricating oil such as an engine oil or a mixture of lubricating oil such as an engine oil. Yes. Among these, from the viewpoint of cost merit, it is preferable to use it mixed with lubricating oil such as engine oil.

[0068] The blending amount of the lubricating oil for the internal combustion engine of the present invention at this time is 5 parts by mass or more when the lubricating oil such as engine oil is 100 parts by mass, and the effects of the present invention are sufficiently obtained. Can do.

[0069] It should be noted that the lubricating oil for an internal combustion engine of the present invention may contain an auxiliary agent as appropriate as long as it contains the above-described lubricant composition. As the auxiliary agent, for example, an oil leakage preventive agent, a vigorous cleaning agent and the like can be mentioned.

Example

[0070] Hereinafter, the present invention will be described specifically based on examples. The present invention is not limited to this.

[Example 1]

Lubricant assembly by mixing 20 g of polyol ester (lubricator oil, manufactured by Castrol, trade name: Icematic) and 0.04 g of usyloop (trade name, organometallic, manufactured by Ushiro Chemical Co., Ltd.) It was set as the composition and this was accommodated in the container. Next, 30 g of HFC-134a was injected into the lubricant composition to obtain a mixed refrigerant. The kinematic viscosity of this mixed refrigerant was 46 m ² Zs. The kinematic viscosity was measured based on the standard ASTM D445 under a temperature condition of 40 ° C.

[Example 2]

Ecostage was mixed with 200 g (trade name, lubricant oil, manufactured by Nippon Oil Co., Ltd.) and Usiloop was mixed with 2 g to obtain a lubricant composition, which was used as a lubricating oil for internal combustion engines. The kinematic viscosity of this internal combustion engine lubricant was 46 m ² Zs. The kinematic viscosity was measured based on the standard AST MD445 under the temperature condition of 40 ° C.

[0073] (Comparative Example 1)

A mixed refrigerant was obtained in the same manner as in Example 1 except that no syrup was used.

[0074] (Comparative Example 2)

A lubricant composition was obtained in the same manner as in Example 2 except that usyloop was not used.

[0075] [Evaluation Method]

(Power test)

The commercial refrigerant (95 Alfa Romeo 155, 5MZT, 2000cc, Twin Spark 8 V) air conditioner compressor was supplemented with the refrigerant mixture obtained in Example 1 and Comparative Example 1, and the chassis dynamo (2WD 3000A The maximum torque and maximum horsepower of the engine were measured using a model (manufactured by Dynapack). This test was conducted by adding 30 g of the above lubricant composition to 700 g of HFC-134a pre-filled in the compressor of the air conditioner. As Reference Example 1, the maximum torque and maximum horsepower of the engine when the air conditioner was not used (compressor not operating) were also measured. The results obtained are shown in Table 1.

[table 1]

[0076] As is apparent from Table 1, when the mixed refrigerant of Example 1 was used, the maximum torque was 0.5 kgZm and the maximum horsepower was 1.9 PS compared to the case where the mixed refrigerant of Comparative Example 1 was used. Improved. That is, the maximum torque and maximum horsepower when the mixed refrigerant of Example 1 was used were almost equal to the maximum torque and maximum horsepower of Reference Example 1 when the air conditioner was not used. From this force, it was found that the use of the mixed refrigerant of the present invention can suppress the decrease in generated output.

[0077] (Fuel consumption test)

A commercial passenger car (95 Alfa Romeo 155, 5MZT, 2000cc, Twin Spark 8 V) was supplemented with the lubricating oil for the internal combustion engine obtained in Example 2 and Comparative Example 2, and the fuel consumption was measured. The fuel consumption was calculated from the value of the trip meter of the vehicle and the fuel supply amount. Such a test was conducted by adding 200 g of the lubricating oil for an internal combustion engine to 3.8 L of a commercially available engine oil (trade name: Multigrade, manufactured by Mobil Corporation). As Reference Example 2, the fuel consumption was also measured when the air conditioner was not used (compressor not operating). Table 2 shows the results obtained.

[Table 2]

[0078] As is apparent from Table 2, when the internal combustion engine lubricant of Example 2 was used, the fuel efficiency was improved by 1.28 kmZL compared to the case of using the internal combustion engine lubricant of Comparative Example 2. . In other words, the fuel consumption when the lubricating oil for the internal combustion engine of Example 1 was used was almost the same as that of Reference Example 2 when the air conditioner was not used. From this, it was proved that the use of the lubricating oil for an internal combustion engine of the present invention can reduce electric power and fuel consumption.

[0079] From the above, it has been confirmed that when the lubricant composition of the present invention is used in a compressor, an internal combustion engine, etc., it is possible to reduce power consumption and fuel consumption, further increase cooling efficiency and suppress a decrease in generated output. .

Claims

The scope of the claims

[1] Lubricating base oil and at least one additive selected from the group consisting of organic metal and metal salt power

A lubricant composition containing

[2] The lubricant composition according to claim 1, wherein the additive is an organic metal.

[3] The lubricant composition according to claim 2, wherein the organic metal is a compound represented by the following general formula (1).

[Chemical 2]

[In formula (1), R ¹ R ² , R. And R ⁴ each independently represents an alkyl group or an aryl group, and M represents a divalent metal. ]

[4] The lubricant composition according to any one of claims 1 to 3, wherein the lubricating base oil is a polyol ester.

[5] A mixed refrigerant comprising the lubricant composition according to any one of claims 1 to 4 and a refrigerant gas.

[6] A lubricating oil for an internal combustion engine comprising the lubricant composition according to any one of claims 1 to 4.