WO2002087821A1

WO2002087821A1 - Method of cutting and grinding refrigerating machine parts

Info

Publication number: WO2002087821A1
Application number: PCT/JP2002/004175
Authority: WO
Inventors: Satoshi Suda; Hideo Yokota; Kazuo Tagawa; Katsuya Takigawa
Original assignee: Nippon Oil Corporation
Priority date: 2001-04-25
Filing date: 2002-04-25
Publication date: 2002-11-07
Also published as: JPWO2002087821A1; JP4409175B2

Abstract

A method of cutting and grinding refrigerating machine parts, which is a method of obtaining refrigerating machine parts constituting the refrigerant circulation system for a no-chlorine containing refrigerant refrigerating machine by cutting and grinding members to be processed, comprises the step of feeding processing oil together with compression fluid to the process area of a member to be processed and the step of cutting and grinding the process area having processing oil fed thereto.

Description

Itoda »

Cutting of refrigerator parts ■ Grinding method

Technical field

The present invention relates to a method for cutting and grinding a refrigerator component, and more particularly, to a method for cutting and grinding a refrigerator component constituting a refrigerant circulation system of a refrigerator such as a freezer, a refrigerator, and an air conditioner. It is.

Background art

Various metal parts (hereinafter referred to as “refrigerator parts”) are used in the refrigerant circulation system provided in refrigeration equipment such as freezers, refrigerators, and air conditioners. As a method of cutting and grinding such a refrigerator component, a method of cutting while supplying a relatively large amount of processing oil to a processing portion of a non-processed member is generally employed. Processing oils include chlorine-based extreme pressure agents such as chlorinated paraffin, phosphorus-based extreme pressure agents such as orthophosphate and acidic phosphate, anti-seizure agents such as ZnDTP, and rust inhibitors such as metal sulfonates. Water-soluble cutting and grinding oil containing water-insoluble cutting and grinding oil, surfactants such as metal sulfonates, amine compounds, etc.] H regulators, and oleic acid and other oil-based agents Etc. are widely used.

The above-mentioned conventional processing oil, when mixed into the refrigerant circulation system, may cause the expansion mechanism such as the cabillary to close. Therefore, when fabricating a refrigerant circulation system using refrigeration parts that have been subjected to cutting and grinding processing, processing oil must be sufficiently removed from refrigeration parts using chlorine-based solvents, fluorine-based solvents, etc. There is a need to.

By the way, in recent years, from the viewpoint of environmental protection, the use of chlorine-based solvents and fluorine-based solvents has been regulated, and solvents that do not contain chlorine or fluorine are now used for removing processing oil. Refrigerating equipment is also subject to regulations on CFCs (chlorofluorocarbons) and HCFCs (chlorofluorocarbons) that have been conventionally used as refrigerants from the viewpoint of environmental protection such as the ozone layer depletion problem. However, replacement of these chlorine-containing refrigerants with non-chlorine-containing refrigerants such as HFC (Hide Port Fluorocarbon) is being promoted. Along with such refrigerant replacement, the development of non-chlorine-containing refrigerant refrigerating machine oil, which replaces the conventional refrigerating machine oil using mineral oil or the like as a base oil, is being promoted. The use of oil has been proposed.

Disclosure of the invention

However, in the conventional cutting ■ grinding method described above, when the processing oil is removed using a solvent that does not contain chlorine / fluorine, the removal of the processing oil is greater than when a chlorine-based solvent / fluorine-based solvent is used. The removal efficiency is low, and processing oil tends to remain on refrigerator components. In particular, if a film is formed on the surface of a refrigerator component due to the reaction of additives contained in the processing oil, it is very difficult to completely remove this film by washing after cutting and grinding. In such a refrigerant circulation system using refrigeration equipment parts from which processing oil has not been sufficiently removed, the physical and physical properties of refrigeration oil originally possessed by the mixing of processing oil or some of its components Chemical properties are impaired, making it difficult to obtain sufficient reliability in the refrigerant circulation system.

For example, if a processing oil or a part thereof (extreme pressure agent, etc.) is mixed into a mixture of a non-chlorine-containing refrigerant and refrigerating machine oil (hereinafter referred to as a “refrigerant / refrigerating oil mixture”), the refrigerant in the low-temperature part of the refrigerant circulation system Processing oil or a part of it precipitates from the refrigerating machine oil mixture, or the processing oil or a part of it reacts with the base oil or additives of the refrigerating machine oil to generate sludge, and as a result, the expansion mechanism etc. Is likely to be blocked. Such a phenomenon is remarkably observed when an ester is used as a base oil of a refrigerator oil. Further, some refrigerator components are subjected to surface treatment after cutting and grinding, such as vane rollers and shafts of compressors. At this time, if processing oil or a part thereof remains on the surface of the refrigerator component, or if surface treatment is performed while a film is formed, the quality of the surface treatment may be degraded.

In addition, copper parts are often used as refrigeration parts, but when copper parts are cut and ground, additives in the processing oil are used to remove copper parts.

PP may corrode

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and when cutting and grinding a refrigerator component, the quality of the refrigerator component is deteriorated. The mixing of the processing oil into the refrigerant circulation system is sufficiently prevented. In addition, it is an object of the present invention to provide a method for cutting and grinding a refrigerator component capable of achieving a sufficient processing accuracy.

Means for Solving the ProblemsAs a result of intensive studies to achieve the above object, the present inventors have solved the above-mentioned problems by performing cutting and grinding while spraying a processing oil together with a compressed fluid onto a processing portion of a workpiece. And completed the present invention.

That is, the method of cutting and grinding a refrigerator component of the present invention is a method of obtaining a refrigerator component constituting a refrigerant circulation system of a refrigerator for non-chlorine-containing refrigerant by cutting and grinding a workpiece. Supplying a processing oil together with the compressed fluid to a processing portion of the workpiece, and cutting and grinding the processing portion to which the processing oil has been supplied.

Is included.

In the present invention, it is preferable that the processing oil contains a base oil of a refrigerating machine oil used for a refrigerating machine. This will reduce the quality of refrigeration parts, prevent processing oil from entering the refrigerant circulation system, and improve processing accuracy. Can be achieved at a higher level, and even when processing oil is mixed into the refrigerant circulation system, sludge generation can be sufficiently prevented.

Further, in the present invention, it is preferable that the processing oil has an ester as a base oil. Ester is the base oil of refrigerating machine oil, and cutting and grinding of refrigerating machine parts using processing oil containing the ester provides sufficiently high processing accuracy even when the supply amount of processing oil is extremely small. Cutting and grinding can be performed with sufficient efficiency, and the effect of preventing sludge formation when processing oil enters the refrigerant circulation system tends to be enhanced. It is in.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic configuration diagram showing an example of a machine tool suitably used in the present invention.

FIG. 2 is an explanatory diagram showing an apparatus used for a frictional characteristic evaluation test in Examples.

BEST MODE FOR CARRYING OUT THE INVENTION

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

(Refrigerator parts)

Cutting of the present invention (1) The refrigerator component obtained by the grinding method is a metal component that constitutes a refrigerant circulation system including a compressor, a condenser, an expansion mechanism, an evaporator, and the like. Specific examples of refrigeration equipment having such a refrigerant circulation system include room air conditioners, packaged air conditioners, refrigerators, vehicle air conditioners, dehumidifiers, freezers, freezer and refrigerated warehouses, vending machines, showcases, and chemical plants. Cooling device and the like.

The refrigerant circulation system provided in these refrigerating devices is configured by a plurality of refrigerating machine components having different materials, processing methods, and the like. When cutting and grinding a refrigerator component by a conventional method, the material of the refrigerator component is It was necessary to select a processing oil suitable for the processing method for each refrigerator component. On the other hand, according to the method for cutting and grinding a refrigerator component of the present invention, a sufficiently high processing accuracy is achieved and the adverse effects such as corrosion due to additives are sufficiently suppressed. Multiple types of refrigerator components can be processed with this processing oil. Therefore, the method for cutting and grinding a refrigerator component according to the present invention is very useful in that it can improve the efficiency of the cutting (1) grinding process, reduce costs and save space. Furthermore, the number of types of refrigerator components that can be processed by a single machine tool increases, which also improves the efficiency of the cutting / grinding process, reduces costs and saves space. Among the refrigerator components that make up refrigeration equipment, the components that make up the compressor, especially those that are subjected to surface treatment (phosphate coating, PVD, DLC, etc.) after cutting and grinding When performing the method, the method of cutting and grinding a refrigerator component of the present invention exhibits excellent effects. The compressor may be an open type, a closed type, or a semi-closed type, and the type of the compressor may be a reciprocating type, a rotary vane type, a rolling piston type, a scroll type, or the like. Screw type and the like can be mentioned.

Specific examples of components that constitute the reciprocating compressor include blocks, shafts, bearings, conrods, piston pins, pistons, cylinders, rotors, and the like.

Specific examples of components constituting the rotary vane compressor include a block, a shaft, a bearing, a vane, a cylinder, a rotor, and the like.

Specific examples of components that make up the rolling biston compressor include blocks, shafts, bearings, vanes, cylinders, rolling pistons, and the like. Specific examples of the components that constitute the scroll compressor include shafts, bearings, fixed scrolls, orbiting scrolls, and Oldham rings.

Specifically, the components that make up the screw compressor include a shaft, a bearing, a male rotor, a female rotor, and the like.

In a refrigerant circulation system using these refrigerator components, a non-chlorine-containing refrigerant is used.

(Non-chlorine containing refrigerant)

The non-chlorine-containing refrigerant referred to in the present invention includes non-fluorine-containing refrigerants such as perfluoroethers and non-fluorine-containing refrigerants such as dimethyl ether, in addition to hydrofluorocarbon (HF C) which is a non-chlorine-containing Freon. It includes ether-based refrigerants and natural refrigerants such as carbon dioxide and hydrocarbons. In the refrigeration equipment according to the present invention, one of these non-chlorine-containing refrigerants is used alone or in combination of two or more.

Hydrofluorocarbons have 1 to 3 carbon atoms, preferably 1 to 3 carbon atoms.

2 Hydlov / Leo mouth carbon. Specifically, methane (HF C-32), trifluoromethane (HFC-23), pentafluoroethane (HFC-125), 1,1,2,2-tetrafluoroethane (HF C-) 1 3 4), 1,1,1,2—tetrafluoroethane (ΉFC-134a), 1,1,1 trifluoroethane (HF C—143a),

Examples include HFC such as 1,1-difluoroethane (HFC-152a), or a mixture of two or more thereof. The type of HFC refrigerant is appropriately selected depending on the application and required performance. For example, HFC-32 alone; HFC-23 alone; HFC-134a alone; HFC-125 alone; HFC_13 4a ZHF C—32 = 60-80 mass ⁰ /. / 40 to 20 mass. /. A mixture of H

FC - 3 2 / HFC- 1 2 5 = 4 0~ 7 0 wt% 76 0-3 0 weight ^_0/0 Mixture; HFC—125 / HFC — 144 a = 40-60% by mass Mixture of 60-40% by mass; HFC—134a ZHF C—32 / HFC—125 = A mixture of 60% by mass Z 30% by mass Z 10% by mass; HFC-134a / HFC-32 / HFC-125 = 40 to 70% by mass. /. / 15 to 35 mass% / 5 to 40 mass% mixture; HFC-125 / HFC-134a /

HFC—14 3 a = 35 to 55 mass% 1 to 15 mass% 40 to 60 mass. / ₀ mixture is a preferred example. More specifically, a mixture of HFC-134a / HFC-132 = 70/30% by mass; a mixture of HFC_32 / HFC-125 = 60/40% by mass; HFC-32 / HFC-125 = 50/50 mass ⁰ /. Mixture of (R 4 10 A); HFC-3 2 /

HFC-125 = 45/55% by mass mixture (R410B); HFC-125 / HFC-143a = 50/50% by mass mixture (R507 C); HFC—32 / U. FC-125 / HFC-134a = 30/10/60 Mass ⁰ /. Mixture of HFC-32 / HFC-125 / HFC-134a = 23/25/52 2% by mass (R407C); HFC-32 / HFC-

12 5 / HFC-13 4 a = 25 / l 5/60 mass ⁰ /. Mixture of (R407E); HFC-125 / HFC-134a / HFC-143a = 44 / 4no52 mass ° / ₀ mixture (R404A) And the like.

In addition, examples of natural refrigerants include carbon dioxide and hydrocarbons. As the hydrocarbon refrigerant, a gaseous refrigerant at 25 ° C. and 1 atm is preferably used. Specifically, it is an alkane, cycloalkane, alkene or a mixture thereof having 1 to 5, preferably 1 to 4 carbon atoms. Specifically, for example, methane, ethylene, ethane, propylene, propane, cycloprononone, butane, isobutane, cyclobutane, methinolesicycloprono, ethanol or a mixture of two or more of these are mentioned. , Propane, butane, isobutane or a mixture thereof is preferably used. (Refrigeration oil).

In the refrigerant circulation system of the non-chlorine-containing refrigerant refrigeration equipment constituted by the above refrigeration parts, refrigeration oil based on mineral oil, synthetic oil or a mixture thereof is usually used.

Among the refrigerating machine oils according to the present invention, as the mineral oil, specifically, a lubricating oil fraction obtained by atmospheric distillation and vacuum distillation of crude oil is subjected to solvent removal, solvent extraction, hydrocracking, Examples include paraffinic or naphthenic mineral oils obtained by appropriately combining one or more purification means of solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment. Further, specific examples of the synthetic oil include polyolefin, alkynolebenzene, ester, ether, silicate, and polysiloxane.

Examples of the polyolefin used in the present invention include homopolymers or copolymers of olefins having 2 to 16 carbon atoms, preferably 2 to 12 carbon atoms, and hydrides thereof. When the polyolefin is a copolymer of two or more olefins having different structures, the monomer ratio and the monomer arrangement in the copolymer are not particularly limited, and a random copolymer, an alternating copolymer, and a block copolymer may be used. Any of these can be used.

The olefin monomer forming the polyolefin according to the present invention may be any of a-olefin and internal olefin, and may be any of linear olefin and branched olefin.

Specific examples of the olefins that can be used in producing the polyolefin according to the present invention include ethylene, propylene, 1-butene, 2-butene, isobutene, linear or branched pentene ( Linear or branched hexene (including α-olefin, internal olefin), linear or branched hepten (including olefin, internal olefin) Linear or branched otaten (including α-olefin and internal olefin), linear or branched nonene (including α-olefin and internal olefin), linear or Branched decene (including α-olefin and internal olefin), linear or branched pendene (including hyolefine and internal olefin), linear or branched dodecene (α-olefin) , 內 part olefin, linear or branched tridecene (including thio olefin, internal olefin), linear or branched tetradecene (including cx olefin, internal olefin), linear Or branched pentadecene (including α-olefin and internal olefins), linear or branched hexadecene (including hyolefin and internal olefins) Beauty While such mixtures thereof, among others, ethylene, propylene, 1 - butene, 2-butene, isobutene, the number 5-1 2 carbon alpha - Orefin and mixtures thereof and the like can be be used preferably. Further, among _α -olefins having 5 to 12 carbon atoms, 1-octene, 1-decene, 1-dodecene and a mixture thereof are more preferable.

The polyolefin according to the present invention can be produced by any method. _C For example, it can be produced by a thermal reaction without using a catalyst, and an organic peroxide catalyst such as benzoyl peroxide; aluminum chloride, aluminum chloride Friedel-Claf type catalysts such as dimethyl polyhydric alcohol, aluminum chloride-titanium tetrachloride, aluminum chloride tin hydride, boron fluoride, etc .; organic aluminum chloride, titanium tetrachloride, organic aluminum Ziegler-type catalyst such as titanium tetrachloride; Meta-open catalyst such as aluminoxane-zirconocene and ionic compound-zirconocene; Lewis acid complex such as aluminum chloride-base and boron fluoride monobasic The above-mentioned olefins are homopolymerized or copolymerized using a known catalyst system such as a Tas type catalyst. It can be produced by. As the base oil component of the present invention, the above-described polyolefin can be used. However, since the polyolefin generally has a double bond, the double olefin in the polymer is taken into consideration in consideration of its thermo-oxidative stability. It is preferable to use a so-called polyolefin hydride having hydrogenated bonds as the base oil. The method for producing the hydride of polyolefin is not particularly limited. For example, polyolefin is hydrogenated with hydrogen in the presence of a known hydrogenation catalyst to saturate the double bond present in polyolefin, thereby obtaining polyolefin. Hydride of quinone can be obtained. In addition, by selecting the catalyst to be used, polymerization of the olefin and hydrogenation of the double bond present in the polymer can be completed in one step without going through the two steps of the polymerization of the olefin and the hydrogenation of the polymer. It is also possible to make it.

Among the polyolefins according to the present invention, an ethylene-propylene copolymer and a copolymer obtained by polymerization of a polybutene (butane-butene (a mixture of 1-butene, 2-butene and isobutene) by-produced during naphtha pyrolysis) fraction Polymers), 1-octene oligomers, 1-decene oligomers, 1-dodecene oligomers, hydrides thereof, and mixtures thereof have excellent heat / oxidation stability, viscosity-temperature characteristics, and low-temperature fluidity. In particular, hydrides of ethylene-propylene copolymers, hydrides of polybutene, hydrides of 1-otene oligomer, hydrides of 1-decene oligomer, 1-dodecene oligomers, and mixtures thereof are preferred.

Incidentally, synthetic oils such as ethylene-propylene copolymer, polybutene and poly-α-olefin currently commercially available as base oils for lubricating oils usually have double bonds already hydrogenated, These commercially available products can also be used as the base oil of the present invention.

As the alkylbenzene used in the present invention, any one may be used. Although it can be used, those having 1 to 4 alkyl groups having 1 to 40 carbon atoms are preferably used.

Here, specific examples of the alkyl group having 1 to 40 carbon atoms include a methyl group, an ethyl group, a propyl group (including all isomers), a butyl group (including all isomers), and a pentyl group. (Including all isomers), hexyl group (including all isomers), heptyl group (including all isomers), octyl group (including all isomers), nonyl group (including all isomers) Decyl group (including all isomers), decyl group (including all isomers), dodecyl group (including all isomers), tridecyl group (including all isomers) , Tetradecyl group (including all isomers), pentadecyl group (including all isomers), hexadecyl group (including all isomers), heptadecyl group (including all isomers), octadecyl Base (Including all isomers), nonadecyl group (including all isomers), icosyl group (including all isomers), henicol group (including all isomers), docosyl group (including all isomers) Tricosyl group (including all isomers), tetracosyl group (including all isomers), pentacosyl group (including all isomers), hexacosyl group (including all isomers), Heptacosyl group (including all isomers), octacosyl group (including all isomers), nonacosyl group (including all isomers), triacontyl group (including all isomers), Hentriacontyl group (including all isomers) All triisocontyl groups (including all isomers), tritriacontyl group (including all isomers), tritriacontyl group (including all isomers), Acontyl group (including all isomers), pentatriacontyl group (including all isomers), hexatriacontyl group (including all isomers), heptatriacontyl group (including all isomers), octatriacontyl Group (including all isomers), nonatriacontyl group (including all isomers), tetracontyl group (including all isomers) Including isomers).

The alkyl group of the alkylbenzene according to the present invention may be linear or branched, but is preferably a branched alkyl group in terms of thermo-chemical stability and viscosity characteristics, and in particular, From the viewpoint of availability, a branched alkyl group derived from an oligomer of an olefin such as propylene, butene, or isoptylene is more preferable.

The number of alkyl groups in the alkylbenzene according to the present invention is preferably 1 to 4 as described above, but from the viewpoint of thermal and chemical stability and availability, alkylbenzene having 1 or 2 alkyl groups, That is, monophenol alkylbenzene, dialkylbenzene or a mixture thereof is most preferred.

Of course, the phenolic benzene may be a mixture of alkylbenzenes having different structures as well as alkylbenzenes having a single structure.

The method for producing alkylbenzene according to the present invention is optional and is not limited at all. For example, alkylbenzene can be obtained by reacting an aromatic compound with an alkylating agent in the presence of an alkylation catalyst. .

Specific examples of the aromatic compound serving as a raw material include benzene, toluene, xylene, ethynolebenzene, methynoleethynolebenzene, ethynolebenzene, and mixtures thereof. As the alkylating agent, specifically, lower monoolefins such as ethylene, propylene, butene, and isobutylene, preferably linear or branched having 6 to 40 carbon atoms obtained by polymerization of propylene. Linear olefins having 6 to 40 carbon atoms obtained by pyrolysis of wax, heavy oil, petroleum fraction, polyethylene, propylene, etc .; petroleum fractions such as kerosene and gas oil Minutes to n— Examples thereof include a linear olefin having 9 to 40 carbon atoms obtained by separating paraffin and olefining the paraffin with a catalyst, and a mixture thereof.

Examples of the alkylation catalyst include known catalysts such as a Freedel Crafts type catalyst such as aluminum chloride and zinc chloride; acidic catalysts such as sulfuric acid, phosphoric acid, kytungstic acid, hydrofluoric acid, and activated clay. Is mentioned.

Examples of the esters used in the present invention include dibasic acid esters, polyol esters, complex esters, and carbonate esters. In this study, esters obtained by using polybasic acids such as dibasic acids or polyhydric alcohols as the acid component and the alcohol component of the ester were obtained by esterification of all carboxylic acid groups or hydroxyl groups. It may be any of the obtained completely esterified product or a partially esterified product in which a part of the carboxylic acid group or the hydroxyl group remains without being esterified, but is preferably a completely esterified product.

Examples of the dibasic acid ester according to the present invention include a linear dibasic acid having 5 to 10 carbon atoms, such as daltaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and sebacic acid; An alicyclic dibasic acid having 8 to 12 carbon atoms such as xan-1,2-dicarboxylic acid and 4-six-hexene-1,2-dicarboxylic acid;

Methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched pentanol, linear or branched hexanol, linear or branched Heptanol, linear or branched octanol, linear or branched nonanol, linear or branched decanol, linear or branched pendanol, linear or branched Dodecanol, linear or branched tridecanol, linear or branched tetradecanol, linear or branched pentadecanol, direct Linear or branched hexadenicol, linear or branched otadadecanol, linear or branched nonadenicol, linear or branched icosanol, linear or branched C1-C24 linear or branched monovalent such as henycosanol, linear or branched docosanol, linear or branched tricosanol, linear or branched tetracosanol, etc. Arco Ichinore

And the mixture thereof are preferably used. Among them, ditridecinoleglutarate, di-2-ethylhexyl adipate, diisodecyl / raedipate, ditridecinorea dipate, di-2-ethynolehexyl / recipeate, and octahexyl-1-, 2 _ dibasic acid ester of diolenovonic acid and isoptananol, dibasic acid ester of cyclohexane-1,2-dicarboxylic acid and 2-ethylhexanol, cyclohexane-11,2-dicarbone Dibasic acid ester of acid and 3,5,5-trimethylhexanol, dibasic acid ester of 4-cyclohexene1-1,2-dicarboxylic acid and isobutanol, Estenole of 4-cyclohexene1-1,2- The dibasic acid ester of dicanoleponic acid and 2-ethylhexanolene, and the diacid of 4-cyclohexene-1,2-dicarboxylic acid and 3,5,5-trimethylhexanol Motosan Es ether, and mixtures thereof are particularly preferred.

As the polyol ester used in the present invention, an ester of a diol or a polyol having 3 to 20 hydroxyl groups and a fatty acid having 6 to 20 carbon atoms is preferably used. Here, specific examples of diols include ethylene glycol, 1,3-propanediole, propylene glycol, 1,4-butanediole, 1,2-butanediole, and 2-methylolane. , 3—Prono ,. 1,5—Pentanediole, Neopentinolegri Cornole, 1,6,1 Hexanediene, 2-Echinole-1, 2-Methylone1,3,1-Propanediole, 1,7_Heptane Diol, 2-meth Nore 2 —propinole 1, 3 —propanediole, 2,2-getinole 1,3-propanediol, 1,8 octanediole, 1,9-nonanediole, 1,10 0-decanediole, Examples thereof include 1,11-dendanediol and 1,12-dodecanediol.

Examples of the polyol having 3 to 20 hydroxyl groups include trimethyloloneethane, trimethylolonepropane, trimethylolonebutane, di (trimethylolpropane), and tri (trimethylolpropane). Propane), pentaerythritol tonole, gee (pentaerythritol tonole), tree (pentaerythritol), glycerin, polyglycerin (2 to 20-mer of glycerin), 1, 3, 5 -Polyhydric alcohols such as pentant thiol, sorbitol, sorbitan, sorbitol glycerin condensate, adotol, arabitol, xylitol, mannitol, xylose, arabinose, ribose, rhamnose, gnorecose , Funolectose, galactose, mannose, sonorepos, Examples thereof include saccharides such as cellobiose, manoletoose, isomarenotose, trehalose, sucrose, raffinose, gentianose, and melesitose, and partially etherified products thereof and methyldalcoside (glycoside).

Further, as the fatty acids, specifically, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, pendenic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecane Acids, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, icosanoic acid, oleic acid, etc .; or neo acids (fatty acids having an α carbon atom of a quaternary carbon atom). Can be Of these, valeric acid, isopentanoic acid, lipoic acid, pelargonic acid, 2-methylhexanoic acid, 2-ethynolepentanoic acid, caprylic acid, 2-ethynolehexanoic acid, nonolemarnonanoic acid,

3, 5, 5-trimethylhexanoic acid and the like are more preferred. Among the polyols composed of the above-mentioned acid component and alcohol component, neopentyl glycol, trimethylonoleethane, and trimethylonoleprono. , Trimethylolbutane, gee (trimethylolpropane), tri-1 (trimethylolone propane), pentaerythritol / re, di-1 (pentaerythritole), trie (pentaerythritol), etc. Particularly preferred are the esters of hindered alcohols. Specific examples of hindered alcohol esters include esters of the above hindered alcohol with straight-chain saturated fatty acids having 3 to 10 carbon atoms and / or branched saturated fatty acids having 5 to 10 carbon atoms. Is mentioned.

The complex ester according to the present invention is an ester of a fatty acid and / or a dibasic acid as an acid component and a monohydric alcohol and / or a polyol as an alcohol component. Examples of the monohydric alcohol and the polyol include the fatty acids, dibasic acids, monohydric alcohols and polyols exemplified in the description of the dibasic acid ester and the polyol ester, respectively.

The carbonic acid ester used in the present invention is an ester of carbonic acid, a monohydric alcohol and a polyol, and the monohydric alcohol and the polyol are exemplified in the above description of the dibasic acid ester and the polyol ester. The monohydric alcohols and polyols thus obtained, polyglycols obtained by homopolymerizing or copolymerizing alkylene oxides, or those obtained by adding the polydarylsol to the polyols can be used.

Examples of the ether used in the present invention include polyglycol, polyvinylinoleatenore, polypheninoleatenole, cyclic atenole, and perphnoleo ether. Among them, polyglycol and polybutyleether are preferable. .

Such polydalicols include polyalkylene glycol, polya Etherified products of lukylendyl alcohol and modified compounds thereof are preferably used.

As the polyalkylene glycol, homopolymerized or copolymerized alkylene oxides such as ethylene oxide, propylene oxide, and butylene oxide are used. In the case where polyalkylene glycols are copolymerized with alkylene oxides having different structures, the polymerization form of the oxyalkylene group is not particularly limited, and a random copolymer or a block copolymer may be used. It can be any of

As the etherified polyalkylene glycol, those obtained by etherifying the hydroxyl groups of the above-mentioned polyalkylene glycol are preferably used. In the etherified product of polyalkylene glycol, the type of the terminal group that forms an ether bond with a hydroxyl group is not particularly limited, and all the hydroxyl groups may be etherified. The force that may be present in the hydroxyl group S, in a preferred embodiment, monomethyl ether, monoethynoleate, monopropynoleate, monopentyleate, monopentyleate, mono Chisinoreethenore, Monoheptinoleethenore, Monooctinoleethenore, Monononinoleethenore, Monodecinoleethenore, Dimethinolethenore, Jetinolethenore, Dipropinolethenore, Djibutinolethenore , Dipentinoreetenore, dihexinoleete nore, diheptinoreete nore, dioc Noreetenore, Gino - Noreetenore, di Desi Norre ether Norre, etc. can be mentioned up.

Furthermore, examples of the modified compound of the poly (vinyl alcohol) include an alkylene oxide adduct of a polyol or an etherified product thereof. As the polyol herein, the polyol exemplified in the description of the polyol ester can be used.

The polyvinyl ether according to the present invention has the following general formula (1): R ¹ R ^c

C—— C- (1)

R ² 0 (FT, 4O,) _m

[In the formula (1), I ¹ , R ² and R ³ may be the same or different and each represents a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, and R ⁴ represents 2 to 1 carbon atoms. 0 represents a divalent hydrocarbon group, R ⁵ represents a hydrocarbon group having 1 to 10 carbon atoms, m represents a number having an average value of 0 to 10 and R ¹ ! ^ ⁵ represents It may be the same or different for each structural unit, and when the same structural unit has a plurality of R ⁴ Os, the plurality of R ⁴ Os may be the same or different. ] Which has the structural unit represented by these.

Generally, characteristics such as lubricity, refrigerant compatibility, thermal and chemical stability, and electrical insulation required for refrigeration oil are determined by the type of refrigeration equipment (open-type refrigerator, hermetic refrigerator, semi-hermetic refrigerator, It depends on the type of refrigerant and the conditions of use, and the base oil of the refrigerating machine oil is appropriately selected according to the intended use. For example, polyglycols, esters, and polyvinyl ethers are preferably used for open compressors such as car air conditioners, and alkylbenzenes, esters, and polyvinyl ethers are preferably used for closed compressors such as refrigerators and air conditioners. The physical properties such as the kinematic viscosity of the refrigerating machine oil are appropriately selected according to the type of refrigerant circulation system (type of compressor and operating conditions, piping length, etc.).

In the refrigerating machine oil according to the present invention, various additives can be mixed with the above base oil. Additives to be blended in refrigerator oil include anti-wear agents such as phosphorus compounds and zinc dithiophosphate; acid scavengers such as epoxy compounds; g-tert-butynole-p-cresol; Phenolic compounds and phenyl α-naphthylamine, N, N-di (2-naphthyl) Chill) Antioxidants such as amine compounds such as 1-p-phenylenediamine; Extreme pressure agents such as chlorinated paraffins and sulfur compounds; Oil agents such as fatty acids; Defoaming agents such as silicone compounds A metal deactivator such as benzotriazole; a viscosity index improver; a pour point depressant; a detergent / dispersant; and the like. These may be used alone or in combination of two or more. it can.

Phosphorus compounds incorporated in refrigerator oil include phosphate esters, acid phosphates, amine salts of acid phosphates, chlorinated phosphates, phosphites, and thiophosphates. It is preferable to mix at least one phosphorus compound selected from the group consisting of: These phosphoric compounds are esters of phosphoric acid, phosphorous acid or thiophosphoric acid with alkynol or polyether alcohols or derivatives thereof.

Phosphoric acid esters include tributyl phosphate, tripentyl phosphate, trihexynolephosphate, triheptinolephosphate, trioctinolephosphate, and trinonyl phosphate. Tridecyl phosphate, tridecyl phosphate, tridodecinole phosphate, tritridecyl phosphate, trite tridecinole phosphate, tridenta desinolephos Pheto, trihexadecinolephosphate, triheptadecinolephosphate, trioctadecyl phosphate, trioleyl phosphate, triphenylinolephosphate, tricinolenophosphate , Tri-xyleninolephate, cresinoresifeninophosphate, xyleninolefinophosphate Norehosufue one door and the like;

Examples of the acid phosphates include monobutyl acid phosphate, monopentyl acid phosphate, monohexyl acid phosphate, monoheptinolate acid phosphate, monooctinoleic acid phosphate, monononyl acid acid phosphate, and monononyl acid phosphate. Acid phosphate, mono undecinoleate acid phosphate, mono dodecyl acid phosphate Fate, monotridecinoleate phosphate phosphate, monotetradecinoleate phosphate phosphate, monopentadecinoleate phosphate phosphate, monohexadedecyladephosphate phosphate, monohexadedecylase phosphate phosphate, monooctadelaceate phosphate phosphate, monooctadelaceate phosphate phosphate monophosphate Phosphate, dipentinoureas acid phosphate, dihexinoureas acid phosphate, diheptyl acide phosphate, dioctylase acid phosphate, dinoninorea acid phosphate, didecyl acid phosphate, didecide acid phosphate, didecyl acid salt phosphate Ridesil Acidho-Surf, Jite Toradeshinoreashi Dohosufe door, dipentaerythritol Desi Roh rare Sit Dohosufeto, to di Kisadeshiruashi' Dohosufeto, Jiheputa Deshiruashi' Dohosufe door, di-O Kuta decyl § Sit Dohosufue door, Jiorei / Reashi' Dohosufue one door and the like;

Examples of the acid phosphinate amide salts include the above-mentioned acid phosphites such as meth / reamin, ethylethylamine, propinoreamin, ptinoreamin, pentylamine, hexinoreamin, and heptii / raemi. , Octylamine, Dimethylamine, Jethylamine, Dipropylamine, Dibutylamine, Dipentylamine, Dihexylamine, Diheptylamine, Dioctylamine, Trimethylamine, Triethylamine, Tripropylamine, Tripropylamine , Tripentylamine, trihexylamine, triheptylamine, trioctylamine, and other salts with amine;

The chlorinated phosphates include tris' dichloro mouth propyl phosphate, tris. Chloroethynole phosphate, and tris ■ cross mouth feninole phosphate, polyoxylane. Cylene bis [di (cycloalkyl)] phosphate;

Examples of phosphites include dibutynolephosphite and dipentylphosphite. Phyto, dihexyl phosphite, diheptyl phosphite, dioctinole phosphite, dinoninole phosphite, didesinole phosphite, zipdesi / re phosphite, didesinole phosphite, dioleinole Phosphites, diphenyl phosphites, dicresyl phosphites, tributyltin phosphites, tripentyl / lephosphites, trihexynolephosphites, triheptyl phosphites, trioctyl phosphites, trinonyl phosphites, Tridecyl phosphite, tridecyl phosphite, tridodecyl phosphite, trioleyl phosphite, triphenyl phosphite, tricresyl phosphite, etc .;

Examples of thiophosphates include tributyl phosphorothioate, tripentinolephosphoronate, trihexyl / refosphorofonate, triheptinolefosorothionate, and trioctinoletone. Phosphorofolate, Trinodinorefosfofonate, Tridecinorefosfofonate, Tridinodecylfosfofonate, Tridodecinofosfofolate, Tri Tridecinolefosfolothonate Tori, tritetradecylphosphorothionate, tripentadecylphosphorothionate, trihexadecylphosphorothionate, triheptadecinolefofofolate, trioctadecinolefofofonate, trioley Lufosphorochone , Trifeninolefosphorothionate, Triclezin / Rephosforotionate, Trixeninolenophorosphoronete, Cregis / Resifenolefosforonate, Xylenyl diphenolenofosfolate, Tris (n-propylpheny) Phosphorothione, Tris (isopropynolefenol) Phosphorothonate, Tris (n-butynolephenino) Phosphorothionate, Tris (isobutylphenyl) Phosphorothionate, Tris (ss) —Butylphenyl) phosphorothionate, tri (T-butylphenyl) phosphorothionate and the like. Also, a mixture of these can be used.

The content of the above phosphorus compound is usually from 0.01 to 5.0% by mass, more preferably from 0.02 to 3% by mass, based on the total amount of the refrigerating machine oil (based on the total amount of the base oil and all the blended additives). 0% by mass is added to the refrigerator oil.

Further, specific examples of the epoxy compound to be blended in the refrigerating machine oil include the following.

(1) phenyldaricidyl ether type epoxy compound

(2) Alkyl glycidyl ether type epoxy compound

(3) Daricidyl ester type epoxy compound

(4) Ryloxylan compound

(5) Alkoxylan compound

(6) Alicyclic epoxy compound

(7) Epoxidized fatty acid monoester

(8) Epoxidized vegetable oil.

(1) Specific examples of the phenol glycidyl ether type epoxy compound include phenyl glycidyl ether and alkyl pheninole glycidyl ether. As used herein, the term alkyl ferdaricidyl ether includes those having 1 to 3 alkyl groups having 1 to 13 carbon atoms, among which those having one alkyl group having 4 to 10 carbon atoms, for example, n-Petinolefenidinoleglycidyl ether, i-Butylphenolinedaricidyl ether, sec-butinolefeninoleregidylideneate, tert—Butinolefenenigreididylateinole, tert-Pentinolefenigleidinoleatene Tenolé, hex z refeni / regricid / leethenol, heptinolefeninolegicid / lether, octylphenyldaricidyl ether, nourphenylphenyldaricidyl ether, decylphenyldaricidyl ether, decylphenyldaricidyl ether, etc. are preferred. age Can be illustrated.

(2) Specific examples of the alkyl glycidyl ether type epoxy compound include decinoleglycidyl ether, pendecyl glycidyl ether, dodecyl glycidyl ether, tridecyl glycidyl ether, tetra decino reglycidyl ether, and 2-ethynolehexyl glycidyl. ether, neopentyl Honoré glycol diglycidyl Honoré ether Honoré, preparative Rimechiro one Norepuronoヽ⁰ cement Ridarishijinoree one Tenore, Pentaerisuri preparative one Norete tiger glycidioxypropyl Honoré et one ether, 1, 6 one hexanediol diglycidyl ether, Sonorebito Lupori glycidyl ether And polyalkylene glycol monoglycidyl ether, polyalkylene glycol diglycidinole ether and the like.

(3) Specific examples of the glycidyl ester type epoxy compound include the following general formula (2):

[In the above formula (2), R represents a hydrocarbon group having 1 to 18 carbon atoms]

The compound represented by these is mentioned.

In the above formula (2), R represents a hydrocarbon group having 1 to 18 carbon atoms. Examples of such a hydrocarbon group include an alkyl group having 1 to 18 carbon atoms and a carbon group having ² to 18 carbon atoms. Alkenyl group of 5 to 7 carbon atoms, cycloalkyl group of 5 to 7 carbon atoms, alkynolecycloalkyl group of 6 to 18 carbon atoms, aryl group of 6 to 10 carbon atoms, alkyl aryl group of 7 to 18 carbon atoms, carbon And an arylalkyl group of the number 7 to 18 and the like. Among them, an alkyl group having 5 to 15 carbon atoms, an alkyl group having 2 to 15 carbon atoms, a phenyl group, and an alkylphenyl group having an alkyl group having 1 to 4 carbon atoms are preferable.

Among glycidyl ester type epoxy compounds, Specific examples thereof include, for example, glycidyl 2,2-dimethyl otanoate, glycidinolebenzoate, glycidinole-tert-ptinolebenzoate, glycidyl acrylate, glycidyl methacrylate and the like.

(4) Specific examples of aryloxysilane compounds include 1,2-epoxystyrene and alkyl-1,2-epoxystyrene.

(5) As the alkyloxysilane compound, specifically, 1,2-epoxybutane, 1,2-epoxypentane, 1,2-epoxyhexane,

1,2-epoxyheptane, 1,2-epoxyoctane, 1,2-epoxynonane, 1,2-epoxydecane, 1,2-epoxypandecane,

1,2-epoxide dodecane, 1,2-epoxytridecane, 1,2-epoxytetradecane, 1,2-epoxypentadecane, 1,2-epoxyhexadecane, 1,2-epoxyheptadecane, 1,1 , 2_epoxysiocutane, 2-epoxynonadecane, 1,2-epoxyicosane, and the like.

(6) As the alicyclic epoxy compound, the following general formula (3):

Compounds in which the carbon atom constituting the epoxy group directly constitutes an alicyclic ring, such as the compound represented by

Specific examples of the alicyclic epoxy compound include, for example, 1,2-epoxycyclohexane, 1,2-epoxycyclopentane, 3,4-epoxycyclohexynolemethinole-1,4-epoxycyclohexane Canolepoxylate, bis (3,4-epoxycyclohexynolemethinole) adipate, exo-1,2,3-epoxynoreponorenanane, bis (3,4-epoxy-1-methylcyclohexylmethyl) adipate, 2- (7-oxabisic) Mouth [4.1.0] Heptot-3-yl) spiro (1,3-dioxane-5,3,-[7] oxabicyclo [4.1.0] heptane, 4- (1, -methinoleepoxy) (Tinole) 1,2-epoxy-12-methinolecyclohexane, 4-epoxyethyl-1,2-epoxycyclohexane, and the like.

(7) Specific examples of the epoxidized fatty acid monoester include esters of epoxidized fatty acids having 12 to 20 carbon atoms and alcohols having 1 to 8 carbon atoms, phenols, and phenols. Can be exemplified. In particular, butynole, hexyl, benzinole, cyclohexynole, methoxethyl, octyl, phenyl, and butylphenyl esters of epoxcystearyl acid are preferably used.

(8) Specific examples of the epoxidized vegetable oil include epoxy compounds of vegetable oils such as soybean oil, linseed oil, and cottonseed oil.

These epoxy compounds usually have a content of 0.1 to 5.0% by mass, more preferably 0.2 to 5.0% by mass, based on the total amount of the refrigerating machine oil composition (based on the total amount of the base oil and all the blended additives). The amount to be 2.0% by mass is blended.

(Processing oil)

As the base oil of the processing oil used in the present invention, either a mineral oil or a synthetic oil may be used, or a mixture of a mineral oil and a synthetic oil may be used. Such mineral oils include, for example, lubricating oil fractions obtained by distilling crude oil under normal pressure and reduced pressure, and then removing the solvent, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrogenation. Examples of the oil include paraffinic and naphthenic oils obtained by appropriately combining purification treatments such as purification, sulfuric acid washing, and clay treatment. Examples of synthetic oils include poly-α-olefin (polybutene, 11-octene oligomer, 1-decene oligomer, etc.), alkylbenzene, alkynolenaphthalene, polyoxyanoleylene glycol, polyphene, and the like. Examples thereof include hydrocarbon-based synthetic oils such as nyl ether, and oxygen-containing synthetic oils such as ester, polyalkylene glycol, and polyvinyl ether.

In the present invention, when the base oil of the refrigerating machine oil used in the refrigerant circulation system of the refrigerating equipment constituted by the above-mentioned refrigerating machine component is used as the base oil of the processing oil, the case where the processing oil is mixed into the refrigerant circulation system Is also preferred because sludge formation can be prevented at a higher level.

In addition, if an ester is used as the base oil for processing oil, it is possible to achieve sufficiently high processing accuracy even with a very small supply amount of processing oil, to reduce tool wear, etc., and to cut sufficiently efficiently · Grinding is preferred.

The ester preferably used in the present invention may be a natural product (usually contained in natural fats and oils such as animals and plants) or a synthetic product, but the thermo-chemical stability of the obtained oil agent composition It is preferably a synthetic ester from the viewpoint of uniformity of the ester component and the like.

The alcohol constituting the esterol may be a monohydric alcohol or a polyhydric alcohol, and the acid constituting the ester may be a monobasic acid or a polybasic acid.

As the monohydric alcohol, one having 1 to 24 carbon atoms, preferably 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms is used. And it may be saturated or unsaturated. Examples of the alcohol having 1 to 24 carbon atoms include, for example, methanol, ethanol, linear or branched propanol, linear or branched ptanol, linear or branched. Pentanol, linear or branched hexanol, linear or branched heptanol, linear or branched otanol, linear or branched nonanol, linear or branched Decanol, linear or branched pendecanol, Linear or branched dodecanol, linear or branched tridecanol, linear or branched tetradecanol, linear or branched pentadecanol, linear or branched hexadenicol , Linear or branched heptadecanol, linear or branched octadecanol, linear or branched nonadenicol, linear or branched icosanol, linear or branched Helicosanol, linear or branched tricosanol, linear or branched tetracosanol, and mixtures thereof. As the polyhydric alcohol, those having 2 to 10 valences, preferably 2 to 6 valences, are used. Specific examples of the polyhydric alcohol of 2 to 10 include, for example, ethylene glycol cornole, diethylene glycol cornole, polyethylene glycol (3 to 15 mers of ethylene glycol cornole), propylene dalicol, and dipropylene glycol. Konore, polypropylene glycidyl Konore (3-1 pentamer of propylene glycol co one Honoré), 1, 3-Puronoヽ⁰ Njio one Honoré, 1, 2-Puronoヽ⁰ Nji O Ichiru, 1, 3- Butanjio Ichizo 1, 2,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1,1,3-propanediol, 1,2—pentane, 1,3, pentanosol, 1,4 (I) dihydric alcohols such as pentanedionole, 1,5-pentanedionole, and neopentynole glycol; glycerin, polyglycerin (2 to 8 parts of glycerin) For example, diglycerin, triglycerin, tetraglycerin, etc.), trimethylonoleanolecan (trimethylonoleethane, trimethylonolepropane, trimethylolbutane, etc.) and dimer to octamer thereof, pentaerythritol and these Dimer, tetramer, 1,2,4-butanantriol, 1,3,51-pentane triolone, 1,2,6-hexanthone triol, 1,2,3,4-butanetrol, sonorebitonele, sonorebitan Polyhydric phenols such as glycerin condensate, sorbitol, aditol, arabitol, xylitol, mannitol; xylose, arabinose, Examples include saccharides such as bose, rhamnose, gnole kose, funolectose, galactose, mannose, sonoreose, cellobiose, manoletoose, isomanoleose, trehalose, sucrose, and mixtures thereof. Among these polyhydric anore cones, ethylene glycol cornole, diethylene glycol cornole, polyethylene glycol cornole (3- to L-mer of ethylene glycol cornole), propylene glycol, dipropylene glycol, propylene glycol cornole (propylene glycol cornole) ~: L 0-mer), 1, 3-Proha. Diol, 2-methyl-1-, 2-propanediole, 2-methylinole-1,3-propanediole, neopentinoleglyconele, glycerin, diglycerin, triglycerin, trimethylol Anolecan (trimethylolethane, trimethylolpropane, trimethylolbutane, etc.) and dimers and tetramers thereof, pentaerythritolone, dipentaerythritolone, 1,2,41-butane trionele, 1,3,5-1 Pentane triol, 1,2,6-hexanthone mono-ole, 1,2,3,4-butane tri-mono, sonolevi tonole, sorbitan, sorbitol glycerin condensate, aditol, arabitone, xylitol Preferred are divalent to hexavalent polyhydric alcohols such as mannitol and the like, and mixtures thereof. Even more preferably, ethylene glycidyl Konore, pro Pirenguri Konore, neopentyl Honoré glycidyl Konore, glycerin Li down, Application Benefits methylol one / Reetan, Application Benefits methylate low Honoré pro Nono ⁰ down, Pentaeri scan Lithol, sorbitan, and these And mixtures. Among these, neopentyldaricol, trimethylonoleethane, trimethylone / reb mouth pan, pentaerythritol, and mixtures thereof are preferred because higher oxidation stability can be obtained.

The alcohol constituting the ester may be a monohydric alcohol or a polyhydric alcohol as described above. However, superior lubricity is obtained in cutting and grinding, and the accuracy of the finished surface of the workpiece is improved. Improvement and wear of tool edge Polyhydric alcohols are preferred from the viewpoint that the effect of preventing abrasion becomes larger, that having a low pour point is more easily obtained, and that the handleability in winter and cold regions is more improved.

In addition, among the acids constituting the ester according to the present invention, as the monobasic acid, a fatty acid having 2 to 24 carbon atoms is usually used, and the fatty acid may be linear or branched, or may be a saturated fatty acid. It can be anything or unsaturated. Specifically, for example, acetic acid, propionic acid, linear or branched butanoic acid, linear or branched pentanoic acid, linear or branched hexanoic acid, linear or branched Heptanoic acid, linear or branched octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched pendecanoic acid, linear or branched Dodecanoic acid, linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched Is branched heptadecanoic acid, linear or branched octadecanoic acid, linear or branched hydroxytoctadecanoic acid, linear or branched nonadecanoic acid, linear or branched Icosanoic acid, linear or branched henkosan Saturated fatty acids such as linear or branched docosanoic acid, linear or branched tricosanoic acid, linear or branched tetracosanoic acid, acrylic acid, linear or branched butene Acid, linear or branched pentenoic acid, linear or branched hexenoic acid, linear or branched heptenic acid, linear or branched otatenic acid, linear or branched Nonenic acid, linear or branched decenoic acid, linear or branched pendecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched Tetradecenoic acid, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid, linear or branched octadecenoic acid, linear Or branched hydroxyoctadecenoic acid, Linear or branched nonadecenoic acid, linear or branched icosenic acid, linear or branched henicosenic acid, linear or branched docosenoic acid, linear or branched tricosenoic acid And unsaturated fatty acids such as linear or branched tetracosenoic acids, and mixtures thereof. Among these, carbon atoms of 3 to 2 are particularly preferred in that they provide more excellent lubricity in cutting and grinding, improve the finished surface accuracy of the workpiece, and increase the effect of preventing wear of the tool edge. Preferred are saturated fatty acids having 0, unsaturated fatty acids having 3 to 22 carbon atoms, and mixtures thereof.Saturated fatty acids having 4 to 18 carbon atoms, unsaturated fatty acids having 4 to 18 carbon atoms, and mixtures thereof are more preferable. Unsaturated fatty acids having 4 to 18 carbon atoms are more preferable, and saturated fatty acids having 4 to 18 carbon atoms are more preferable from the viewpoint of preventing stickiness.

Examples of polybasic acids include dibasic acids having 2 to 16 carbon atoms and trimellitic acid. The dibasic acid having 2 to 16 carbon atoms may be linear or branched, and may be saturated or unsaturated. Specifically, for example, ethanenic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear Or branched heptanic acid, linear or branched otatanniic acid, linear or branched nonannic acid, linear or branched decandioic acid, linear or branched pentanedioic acid, Linear or branched dodecandioic acid, linear or branched tridecandioic acid, linear or branched tetradecandioic acid, linear or branched heptadecandioic acid, linear or branched Hexadecanedioic acid, linear or branched hexenedioic acid, linear or branched heptenedioic acid, linear or branched otatenedioic acid, linear or branched Nonennic acid, linear or branched decenedioic acid, linear or branched Sendioic acid, linear or branched dodecenedioic acid, linear or branched tridecenedioic acid, linear or branched tetradecenedioic acid, linear or branched Heptadecenedioic acid, linear or branched hexadeseninic acid, and mixtures thereof.

The acid constituting the ester according to the present invention may be a monobasic acid or a polybasic acid as described above, but when a monobasic acid is used, the viscosity index can be improved, the misting property and the like can be improved. It is preferable since an ester contributing to the improvement of the non-stickiness can be easily obtained.

The combination of the alcohol and the acid forming the ester of the present invention is arbitrary and not particularly limited. Examples of the ester usable in the present invention include the following esters.

(i) — ester of a monohydric acid with a monohydric alcohol

(ii) Ester of polyhydric alcohol and monobasic acid

(iii) Ester of monohydric alcohol and polybasic acid

(iv) Ester of polyhydric alcohol and polybasic acid

(V) —Halogenated alcohol, mixture with polyhydric alcohol and mixture with polybasic acid

(vi) Mixed polyester with a mixture of polyhydric alcohol and monobasic acid or polybasic acid

(vii) A mixed ester of a mixture of a monohydric alcohol and a polyhydric alcohol with a monobasic acid and a polybasic acid.

Among these, superior lubricity is obtained in cutting and grinding, improving the finished surface accuracy of the workpiece and increasing the effect of preventing wear of the tool edge, and those with a low pour point are easier to obtain. (Ii) An ester of a polyhydric alcohol and a monobasic acid from the viewpoints of better handling in winter and cold regions, higher viscosity index and easier misting. Preferably.

Examples of the ester derived from a natural product used in the present invention include: Oil, palm kernel oil, rapeseed oil, soybean oil, sunflower oil, and high-oleic rapeseed oil, high-oiled tsukusa, in which the content of oleic acid in fatty acids constituting glycerides has been increased by breeding and genetic modification operations Natural oils and fats such as vegetable oils such as flavonoid oil and animal oils such as lard.

In the present invention, the ester obtained when a polyhydric alcohol is used as the alcohol component may be a complete ester in which all of the hydroxyl groups in the polyhydric alcohol are esterified, and a part of the hydroxyl groups is not esterified and the hydroxyl groups are not esterified. A partial ester which remains as it is may be used. The organic acid ester obtained when a polybasic acid is used as the acid component may be a complete ester in which all of the carboxyl groups in the polybasic acid are esterified, or a part of the carboxylic acid group may be an ester. The partial ester may be a carboxyl group that is not converted and remains.

The iodine value of the ester according to the present invention is preferably from 0 to 80, more preferably from 0 to 60, still more preferably from 0 to 40, even more preferably from 0 to 2

0, most preferably 0-10. Further, bromine number of the ester according to the present invention, preferably _{_{0~ 5 0 § 8]: 2}} 1 0 0 8, more preferably 0 SO g B r sZ l OO g, more preferably 0 to 2 0 g B r ₂ Z l OO g, most preferably _{0~ 1 0 g B r 2/} 1 0 0 g. When the iodine value and bromine value of the ester are within the above-mentioned ranges, the resulting oil agent tends to have more tacky prevention properties.

The iodine value here is determined by the indicator titration method in JIS 0700 "Method for measuring acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable value of chemical products". It refers to the measured value. The bromine value is a value measured according to JISK265 “Chemical products-Bromine value test method-Electrometric titration method”. Further, in order to impart even better lubrication performance to the oil agent of the present invention, the hydroxyl value of Estenole is 0.01 to 300 mg KOH / g, and the saponification value is 100 to 500. Preferably it is O mg KOH / g. In the present invention, the upper limit of the hydroxyl value of the ester for obtaining higher lubricity is more preferably 200 mg K〇H / g, and most preferably 150 mg KOH / g. The lower limit is more preferably 0.1 mg KOHZg, still more preferably 0.5 mg KOH / g, still more preferably 1 mg KOHZg, even more preferably Smg KOH / g, Most preferably, it is 5 mg KOH / g. Further, the upper limit of the saponification value of the ester is more preferably 40 Omg K / H / g, and the lower limit thereof is more preferably 200 mg K〇H / g.

The hydroxyl value here is determined by the indicator titration method of JISK 0700 `` Method for measuring acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable value of chemical products ''. It refers to the measured value. The saponification value is a value measured by the indicator titration method of JISK 2503 “Aerospace Lubricating Oil Test Method”.

The kinematic viscosity of the ester according to the present invention is not particularly limited, but the upper limit of the kinematic viscosity at 40 ° C is preferably 200 mm ² / s from the viewpoint of easy supply to the processing site. And more preferably 100 mm ² / s, more preferably 75 mm ² s, and most preferably 50 mm ² s. On the other hand, the lower limit is preferably 3 mm ² Z s, more preferably 5 mm ² Z s, and most preferably 7 mm ² / s.

The pour point and viscosity index of the ester according to the present invention are not particularly limited, but the pour point is preferably at most 110 ° C, more preferably at most 120 ° C. The viscosity index is desirably 100 or more and 200 or less. The processing oil used in the present invention is the above-mentioned base oil (preferably (I.e., the base oil content is 100% by mass), or may contain additives as necessary. However, from the viewpoint of biodegradability such that the processing oil is easily decomposed by microorganisms such as bacteria and the surrounding environment is maintained, the ester content is 10 mass ° / _{0 based on the} total processing oil. It is preferably at least 20% by mass, more preferably at least 20% by mass, even more preferably at least 30% by mass, most preferably at least 50% by mass. '' In addition, if both the refrigerating machine oil and the processing oil contain esters that are preferable from the viewpoint of the characteristics of the processing oil, the quality of the refrigerating machine parts will be reduced. In addition, it is possible to achieve sufficient processing accuracy, and even when processing oil is mixed into the refrigerant circulation system, the effect of the present invention that the sludge generation can be sufficiently prevented can be achieved. This is preferable because the tendency is to be made.

Further, the processing oil according to the present invention preferably contains a phosphorus compound and a Z or sulfur compound because it can further improve the cutting performance, and it is more preferable to use both in combination.

It should be noted that in processing oils containing ester as a base oil, it is considered that the effect of adding the phosphorus compound and the Z or sulfur compound cannot be expected unless the compounding amount is not more than a predetermined amount. As an oil agent, if a large amount of phosphorus compounds and Z or sulfur compounds is contained, it is considered that the tool life will be significantly shortened, so cutting and grinding oil oils using ester as a base oil It has been conventionally thought that no phosphorus compound and no Z or sulfur compound can be added to the steel.

However, contrary to such a conventional general idea, in the present invention, even if both the ester and the phosphorus compound and / or the sulfur compound are contained, the reduction in tool life is small and the cutting performance is low. To improve It becomes possible.

Specific examples of the phosphorus compound according to the present invention include phosphoric ester, acidic phosphoric acid ester, amine salt of acidic phosphoric acid ester, chlorinated phosphoric acid ester, phosphorous acid ester and phosphorous acid ester. Forochonate and the like. These phosphorus compounds include esters of phosphoric acid, phosphorous acid or thiolic acid with alkanol, polyether-type alcohol or derivatives thereof. More specifically, the phosphoric acid esters include triptinolephosphate, tripentinolephosphate, trihexinolephosphate, triheptinolephosphate, and trioctinolephosphate. Triphosphate, tridecanol phosphate, tridecyl phosphate, tridecyl phosphate, tridodecinole phosphate, tritridecyl phosphate, tritetradecinolephos Tritate, tripentadecinolephosphate, trihexadecinolephosphate, triheptadecyl phosphate, trioctadecinolephosphate, trileinolephine phosphate, triphenylinolephosphate Tris-resinole phosphate, trixyleninole phosphate, resins Acid phosphates such as monobutyl acid phosphate, monopentic acid / raeacid phosphate, monohexyl acid phosphate, monoheptyl acid phosphate, and monooctyl acid / rare acid acid phosphate; , Mono-nonino rare acid phosphate, mono-decinyl acid phosphate, mono-undecyl acid phosphate, mono-dodecyl acid phosphate, mono-tridecyl acid phosphate, mono-tetradecyl acid phosphate, mono-tetra-dodeca monophosphate Dephosphate, Monoheptadecorate phosphate, Monooctade / Raresh phosphate, Monoolecinophosphate Dephosphate, dibutinorea acid phosphate, dipentyl acid Sphate, Dihexyl Acid Phosphate, Diheptyl Acid Phosphate, Dioctyl Acid Phosphate, Ginoel Acid Phosphate, Gidecinoleac Acid Phosphate, Gindesinoleac Acid Phosphate, Jidodecylash Glyde Phosphate Phosphate , Ditetradecinoleic acid phosphate, dipentadecinoleic acid phosphate, dihexadecinoleic acid phosphate, diheptadecylacid phosphate, dioctadecylacid phosphate, dioleinoreacid acid phosphate, etc .;

Examples of the amine salt of the acidic phosphoric acid ester include the above-mentioned acidic phosphoric acid esters such as methinoreamine, ethinoreamin, propinoreamin, butinoreamin, pentylamine, hexylamine, heptylamine, octylamine, dimethylamine, and the like. Getylamine, dipropylamine, dibutylamine, dipentinoleamine, dihexinoleamine, diheptinoleamine, dioctinoleamine, trimethylamine, triethylamine, tripropylamine, triptylamine, tripentylamine, Salts with amines such as rihexylamine, triheptylamine and trioctylamine;

Examples of chlorinated phosphoric acid esters include tris'dichloropropyl phosphate, tris'chloroethynolephosphate, tris'cloguchi phenylenophosphate, and polyoxyalkylene bis. [Di (cycloalkyl)] phosphate, etc .;

Examples of phosphites include dibutyl phosphite, dipentyl phosphite, dihexyl phosphite, diheptyl phosphite, octyl phosphite, dinoninole phosphite, didinole phosphite, Didecinolephosphite, didodecinolephosphite, zoleic / lephosphite, diphenylphosphite, dicresylphosphite, triptylinephosphite, tripentinophosphite, trihexyphosphite / Rehoshuai , Triheptyl phosphite, trioctyl phosphite, trinonyl phosphite, tridecyl phosphite, tridecyl phosphite, tridodecyl phosphite, trioleyl phosphite, Refininophosphite, tricresinolephosphite, etc .;

Phosphorofonates include triptyl phosphorofolate, 1, liptyl phorfofoate, trihexynolefosfolate, triheptylphosphorofonate, trioctinolefosfolate, Trinoenol phosphorophonate, tridecyl phosphorofolate, tridecyl phosphorofolate, tridodecyl phosphorofonate, tritridecyl phosphorofonate, trite tridecyl phosphoroate, trite tradecinolenate Phosphorothionate, Tripentadecyl phosphophoronate, Trihexadecinolephosphoronate, Triheptadecyl phosphophoronate, Trioctadesi / Refos phosphorotionate, Trioleyl phosphorotionate, Trifenyl phosphorothioate, tricresyl phosphorofolate, trixyleninolefofofolate, cresinoresiefenorefofofonate, xyleninoresiefinofosfofonate, tris ( Phosphorothione, Tris (isopropylphenyl) Phosphorotionate, Tris (n-Butynorefene / Le) Phosphorothionate, Tris (Isopuchi / Refer) ) Phosphorothionate, tris (s-butylphenyl) phosphorothionate, tris (t-butylphenyl) phosphorothionate, etc.

Is mentioned. Also, a mixture of two or more of these can be used.

In the present invention, among the above-mentioned phosphorus compounds, phosphate esters, acid phosphate esters, and esteranolite of phosphorous acid are preferable since higher cutting performance and friction characteristics are obtained, and triarinorephosphate, Gianorekinore Acid phosphite and dialkyl phosphite are more preferable. When these phosphorus compounds are blended with the processing oil, the amount of the phosphorus compound is not particularly limited. However, in view of the effect of improving the cutting performance and friction characteristics, the total amount of the processing oil is used.

(Based on the total amount of base oil and all blended additives), the content is preferably at least 0.001% by mass, more preferably at least 0.05% by mass, and preferably at least 0.05% by mass. Even more preferably, it is 1% by mass or more. 5 mass in terms of tool life. / ₀ or less, more preferably 3% by mass or less.

Specific examples of the sulfur compound according to the present invention include carbyl polysulfide disulfide, sulfide ester, sulfide mineral oil, zinc dithiophosphate compound, zinc dithiocarbamate compound, molybdenum dithiophosphate compound and dithiophosphate. And molybdenum sulfate.

Dihydrocarbyl polysulfide is a sulfur compound generally called polysulfide or olefin sulfide, and is specifically represented by the following general formula (4):

R ^{1 0} -S _x -R ^{1 1} (4)

[In the formula (4), R ^lt} and R ¹¹ may be the same or different, and each is a straight-chain or branched alkyl group having 3 to 20 carbon atoms, and 6 to 20 carbon atoms. Represents an aryl group having 6 to 20 carbon atoms or an arylalkyl group having 6 to 20 carbon atoms, and X represents an integer of 2 to 6, preferably 2 to 5]

Means a compound represented by R ¹ in the general formula (4). And R ¹¹ are, specifically, n-propyl, isopropyl, n-butyl, isoptyl, sec-butyl, tert-butyl, straight-chain or branched pentyl, straight-chain or Branched hexyl group, straight or branched heptyl group, straight or branched octyl group, straight or branched nor group, straight or branched decyl group, Linear or branched pentadecyl group, linear or branched dodecyl group, linear or branched tridecyl group, linear or branched tetradecyl group, linear or branched pentadecyl group, linear or branched hexadecyl group, A linear or branched alkyl group such as a linear or branched heptadecyl group, a linear or branched octadecyl group, a linear or branched nonadecyl group, a linear or branched icosyl group; a phenyl group And aryl groups such as naphthyl group; tolyl group (including all structural isomers), ethylphenyl group (including all structural isomers), linear or branched propylphenyl group (all structural isomers) ), A linear or branched pentylphenyl group (including all structural isomers), a linear or branched pentylphenyl group (including all structural isomers), a linear or branched hexylphenyl group (Including all structural isomers), Chain or branched heptyl phenyl (including all structural isomers), straight-chain or branched octyl phenyl (including all structural isomers), straight-chain or branched nonyl phenyl (including all structural isomers) ), Linear or branched decylphenyl group (including all structural isomers), linear or branched undecylphenyl group (including all structural isomers), linear or branched dodecylphenyl group (including all structural isomers) Xylyl group (including all structural isomers), ethylmethylphenyl group (including all structural isomers), getylphenyl group (including all structural isomers), di (linear or Branched) propylphenyl group (including all structural isomers), di (linear or branched) butylphenyl group (including all structural isomers), methylnaphthyl group (including all structural isomers) The Lunaphthyl group (including all structural isomers), linear or branched propylnaphthyl group (including all structural isomers), linear or branched butylnaphthyl group (including all structural isomers), Dimethylnaphthyl group (including all structural isomers), ethyl methylnaphthyl group (including all structural isomers), getylnaphthyl group (including all structural isomers), di (linear or branched) Propylnaphthyl group (including all structural isomers), di (linear or branched) butylnaphthyl group (all structural isomers) Alkylaryl groups such as benzyl groups, phenylethyl groups (including all isomers), and arylalkyl groups such as phenylpropyl groups (including all isomers); Can be mentioned. Among these, as R ⁹ and R in the general formula (6), an alkyl group having 3 to 18 carbon atoms or an aryl group having 6 to 8 carbon atoms derived from propylene, 1-butene or isoptylene. It is preferable that they be an acryloxyaryl group or an arylalkyl group. Examples of these groups include an isopyryl group, a branched hexyl group derived from a propylene dimer (all branched isomers). ), Branched nonyl groups derived from propylene trimer (including all branched isomers), branched dodecyl groups derived from propylene tetramer (including all branched isomers) Pentadecyl group derived from propylene pentamer (including all branched isomers), branched octadecyl group derived from propylene hexamer (including all branched isomers) Body). Sec — Butyl, tert-butynole, branched octyl derived from 1-butene dimer (including all branched isomers), branched octyl derived from isobutylene dimer (all ), Branched dodecyl group derived from 1-butene trimer (including all branched isomers), branched dodecyl group derived from isobutylene trimer (Including all branched isomers), branched hexadecyl group derived from 1-butene tetramer (including all branched isomers), branching derived from isobutylene tetramer Groups such as hexadecyl group (including all branched isomers); phenyl group, tolyl group (including all structural isomers), ethylphenyl group (including all structural isomers), xylyl group Alkyla (including all structural isomers) Reel group: an arylalkyl group such as a benzyl group or a pheninoleethyl group (including all foreign organisms).

Further, R ¹ in the above general formula (4). And as the R ^{1 1,} the cutting performance From the viewpoint, separately, it is more preferable that it is a branched alkyl group having 3 to 18 carbon atoms derived from ethylene or propylene, and a branched alkyl group having 6 to 15 carbon atoms derived from ethylene or propylene. Particularly preferred is an alkyl group.

Specific examples of the sulfurized ester include animal and vegetable fats such as beef tallow, lard, fish fat, rapeseed oil, soybean oil, and the like; unsaturated fatty acids (oleic acid, linoleic acid, and fatty acids extracted from the above animal and vegetable fats and oils, and the like). And unsaturated alcohols obtained by reacting various alcohols; and _c- sulfide mineral oils obtained by sulfidizing a mixture of these by any method. It refers to a substance in which sulfur is dissolved. Here, the mineral oil used in the sulfide mineral oil according to the present invention is not particularly limited. Specifically, specifically, a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation is Paraffinic mineral oil, naphthenic mineral oil, etc. refined by appropriately combining refining treatments such as solvent dewatering, solvent extraction, hydrocracking, solvent dewaxing, contact dewaxing, hydrorefining, sulfuric acid washing, and clay treatment Can be The elemental sulfur may be in any form such as a lump, a powder, or a molten liquid, but the use of powdered or molten liquid elemental sulfur allows efficient dissolution in base oil. It is preferable because it can be performed. Melting liquid sulfur has the advantage that melting can be performed in a very short time because the liquids are mixed with each other.However, it must be handled at a temperature higher than the melting point of elemental sulfur. Handling is not always easy, as it requires special equipment such as equipment and requires handling in a high-temperature atmosphere, which may be dangerous. On the other hand, powdered elemental sulfur is particularly preferable because it is inexpensive and easy to handle, and the time required for dissolution is sufficiently short. Further, the sulfur content in the sulfide mineral oil according to the present invention is not particularly limited, but is usually preferably 0.05 to 1.0% by mass based on the total amount of the sulfide mineral oil. More preferably, it is 0.1 to 0.5% by mass.

The zinc dithiophosphate compound, the zinc dithiophosphate compound, the molybdenum dithiophosphate compound and the molybdenum dithiophosphate compound are respectively represented by the following formulas (5) to (8):

(Five)

(6)

[In the formula (5) ~ (8), R 12, Rl 3, R ", R 15, R 1S, R 17, R 18, R 19, R20, R21, R22, R23, R 24, R 25, R 26 and R 27 may be the same or different and each represents a hydrocarbon group having 1 or more carbon atoms, and X represents an oxygen atom or a sulfur atom.

Means a compound represented by ^{^{Wherein, R 12, R 13, R}} 14, R 15, R 16, R 17, R 18, R 19, R 20, R 21, R 22, R 23, R 24, R 25, R 26 and R ²⁷ Specific examples of the hydrocarbon group represented by are a methyl group, an ethyl group, a propyl group (including all branched isomers), a butyl group (including all branched isomers), a pentyl group ( Hexyl group (including all branched isomers), hexyl group (including all branched isomers), octyl group (including all branched isomers), hexyl group (including all branched isomers) ), Nonyl group (including all branched isomers), decyl group (including all branched isomer pairs), pendecyl group (including all branched isomer pairs), dodecyl group (including all branched isomers) Pairs), tridecyl groups (including all branched isomers), tetradecyl groups (including all branched isomers) , Pentadecyl group (including all branched isomers), hexadecyl group (including all branched isomers), heptadecyl group (including all branched isomers), octadecyl group (including all branched isomers) ), Nonadecyl group (including all branched isomers), icosyl group (including all branched isomers), henicosyl group (including all branched isomers), docosyl group (including all branched isomers) Alkyl groups such as branched isomers), tricosyl group (including all branched isomers), tetracosyl group (including all branched isomers); cyclopentyl group, cyclohexinole group, and Cyclopentyl group such as pentinole group; methylcyclopentyl group (including all substituted isomers), ethylcyclopentyl group (including all substituted isomers), dimethyl Lucyl pentyl group (including all substituted isomers), Provircyclopentyl group (including all branched and substituted isomers), methylethyl pentyl group (including all substituted isomers), trimethylcyclopentyl Pentyl group (including all substituted isomers), butylcyclopentyl group (including all branched and substituted isomers), methylpropylcyclopentyl group (including all branched and substituted isomers), Methylcyclopentyl group (including all substituted isomers), dimethylethylcyclyl Pentyl group (including all substituted isomers), methylcyclohexyl group (including all substituted isomers), ethylcyclohexyl group (including all substituted isomers), dimethylcyclohexyl group (Including all substituted isomers), propylcyclohexyl group (including all branched and substituted isomers), methylethylcyclohexyl group (including all substituted isomers), trimethylcyclyl Hexyl group (including all substituted isomers), hexyl group (including all branched isomers and substituted isomers), hexyl group (including all branched isomers) Hexyl group (including all substituted isomers), dimethylethyl hexyl group (including all substituted isomers), methylcyclohexyl group (including all substituted isomers) Group (including all substituted isomers), ethyl heptyl group (including all substituted isomers), dimethylcycloheptyl group (including all substituted isomers), propylcycloheptyl group (including all substituted isomers) Branched isomers and substituted isomers), methyl ethyl heptyl group (including all substituted isomers), 'trimethyl cyclized heptyl group (including all substituted isomers), and butyl cyclized heptyl group Group (including all branched isomers and substituted isomers), methylpropyl cycle heptyl group (including all branched and substituted isomers), getylcycloheptyl group (including all substituted isomers) Alkylcycloalkyl groups such as dimethylethylcycloheptyl group (including all substituted isomers); aryl groups such as phenyl group and naphthyl group; Ryl group (including all substituted isomers), xylyl group (including all substituted isomers), ethylphenyl group (including all substituted isomers), propylphenyl group (including all branched isomers) Isomer, substituted isomer), methylethylphenyl group (including all substituted isomers), trimethylphenyl group (including all substituted isomers), butylphenyl group (including all branched isomers) , Substituted isomers), methylpropylphenyl group (including all branched isomers and substituted isomers), getylfuunyl group (Including all substituted isomers), dimeterethyl phenyl group (including all substituted isomers), pentylfuryl group (including all branched and substituted isomers), hexylfur Group (including all branched and substituted isomers), heptylfuunyl group (including all branched and substituted isomers), octylfuel group (including all branched and substituted isomers) ), A nor-phenyl group (including all branched and substituted isomers), a de'silphenyl group (including all branched and substituted isomers), a decylphenyl group (including All branched isomers, including substituted isomers), dodecyl phenyl group (including all branched and substituted isomers), tridecyl fell group (including all branched and substituted isomers), Tradecyl fuel group (all Branched isomers, including substituted isomers), pentadecylphenyl group (including all branched and substituted isomers), hexadecyl fell group (including all branched and substituted isomers), heptadecylf Alkylaryl groups such as -aryl group (including all branched and substituted isomers) and octadecylfuunyl group (including all branched and substituted isomers); benzyl group, phenethyl And arylalkyl groups such as phenylpropyl group (including all branched isomers) and phenylbutyl group (including all branched isomers). In the present invention, among the above sulfur compounds, it is preferable to use at least one selected from the group consisting of dihydrocarbyl polysulfides and sulfide esters, because higher cutting performance and friction characteristics can be obtained.

When these sulfur compounds are blended with the processing oil, the blending amount is not particularly limited. However, from the viewpoint of improving the cutting performance and friction characteristics, the processing oil is based on the total amount of the processing oil (based on the total amount of the base oil and all the additives). Is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more. Further, from the viewpoint of tool life, the content is preferably 10% by mass or less, and more preferably 5% by mass or less. The processing oil used in the present invention preferably contains an antioxidant. Cutting of the present invention ■ In the grinding method, since the processing oil is supplied in a mist state by a micro oil supply method, the inside of a machine tool used for cutting and grinding, a work, a tool, and a mist collector are used. In some cases, the processing oil adheres and causes stickiness, which may hinder handling and reduce work efficiency.However, using a processing oil containing an antioxidant may result in an oil agent. Stickiness due to deterioration can be suppressed. Antioxidants that can be used include those used for lubricants or as food additives, such as 2,6-di-tert-butyl-ρ-cresol (DBPC), 4,4'-methylenebis (2,6-di-tert-butylphenol), 4,4, -bis (2,6-ditert-butyltinphenol), 4,4, -thiobis (6-tert-butyl-o-) Cresonole), ascorbic acid (vitamin C), fatty acid ester of ascorbic acid, tocopherolone (vitamin E), 3,5-di-tert-butynole 4-hydroxy anisol, 2-tert-butyl-4 —Hydroxyanisole, 3—tert-butynoley 4—Hydroxyesoneol, 1,2-dinoydrole 6—ethoxy-1,2,2'4-trimethylquinoline (ethoxyquin), 2— (1, 1—Dimethinole ) Examples include 1,4-benzenebenzene (TB HQ) and 2,4,5-trihydroxybutyrophenone (THBP).

Among these antioxidants, ascorbic acid (vitamin C), fatty acid esters of ascorbic acid, tocopherol (vitamin E), 2,6-di-tert-butynole ρ-tarezone (DBPC) , 3,5-di-tert-butylinole 4-hydroxanisone, 2-tert-butynole 4-hydroxynisonole, 3-tert-butylinole4-hydroxyanisole, 1,2-di-high Draw 6-ethoxy 2,2,4-trimethylquinoline (ethoxyquin), 2- (1,1-dimethyl) 1-1,4-benzenediol (TBH Q), or 2,4,5—trihydroxypuchi oral phenone (THBP) is preferred, ascorbic acid (vitamin C), fatty acid ester of ascorbic acid, tocopheronole (vitamin E), 2,6— Di-tert-butynole; cresol (DBPC) or 3,5-zy tert-butynole 4-hydroxyhydroxysol is more preferred.

The content of the antioxidant is not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.1% by mass, based on the total amount of the processing oil, in order to maintain good oxidation stability. It is at least 0.5% by mass, most preferably at least 0.1% by mass. On the other hand, the content is preferably 10% by mass or less, more preferably 5% by mass or less, and most preferably 3% by mass or less, since the effect cannot be expected to be improved even if it is added more than that. .

Further, the processing oil used in the present invention preferably contains an oil agent from the viewpoint of improving lubricity such as cutting performance.

As the oily agent, (A) alcohol, (B) carboxylic acid, (C) unsaturated sulfide of rubonic acid, (D) the following general formula (9):

[In the general formula (9), R ¹ represents a hydrocarbon group having 1 to 30 carbon atoms, m ¹ represents an integer of up to 6, and n ¹ represents an integer of 0 to 5.]

(E) a compound represented by the following general formula (10):

(Ten)

[In the general formula (10), R ² represents a hydrocarbon group having 1 to 30 carbon atoms, m ² represents an integer of 1 to 6, and n ² represents an integer of 0 to 5] Embedded image, (F) a polyoxyalkylene compound, and (G) ester. Hereinafter, these oil agents will be described.

(A) The alcohol may be a monohydric alcohol or a polyhydric alcohol. A monohydric alcohol having 1 to 40 carbon atoms is preferred from the viewpoint of obtaining higher lubricating performance and excellent workability, more preferably an alcohol having 1 to 25 carbon atoms, and most preferably an alcohol having 1 to 25 carbon atoms. 8 to 18 alcohols. Specifically, examples of the alcohol constituting the ester of the base oil can be given. These alcohols may be linear or branched, and may be saturated or unsaturated, but are preferably saturated from the viewpoint of preventing stickiness.

(B) The carboxylic acid may be a monobasic acid or a polybasic acid. A monovalent carboxylic acid having 1 to 40 carbon atoms is preferable from the viewpoint that higher lubricating performance is obtained and excellent workability is obtained, and a carboxylic acid having 5 to 25 carbon atoms is more preferable. Most preferably, it is a carboxylic acid having 5 to 20 carbon atoms. Specifically, examples of the carboxylic acid constituting the ester as the base oil can be given. These carboxylic acids may be linear or branched and may be saturated or unsaturated, but are preferably saturated carboxylic acids from the viewpoint of preventing stickiness.

Examples of the sulfide of the unsaturated carboxylic acid (C) include the sulfide of the unsaturated carboxylic acid of the above (B). Specific examples include oleic acid sulfide.

(D) In the compound represented by the following general formula (9), examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ¹ include a linear or branched alkyl group having 1 to 30 carbon atoms. Group, cycloalkyl group having 5 to 7 carbon atoms, alkyl group having 6 to 30 carbon atoms, linear or branched alkyl group having 2 to 30 carbon atoms Examples include a kenyl group, an aryl group having 6 to 10 carbon atoms, an alkyl aryl group having 7 to 30 carbon atoms, and an aryl alkyl group having 7 to 30 carbon atoms. Among them, a linear or branched alkyl group having 1 to 30 carbon atoms is preferable, a linear or branched alkyl group having 1 to 20 carbon atoms is more preferable, and a carbon number is more preferable. A linear or branched alkyl group having 1 to 10 carbon atoms, most preferably a linear or branched alkyl group having 1 to 4 carbon atoms. Examples of the linear or branched alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, a linear or branched propyl group, and a linear or branched butyl group.

The substitution position of the hydroxyl group is arbitrary, but when it has two or more hydroxyl groups, it is preferable that the hydroxyl group is substituted with an adjacent carbon atom. m ¹ is preferably an integer of 1 to 3, and more preferably 2. n ¹ is preferably an integer of 0 to 3, and more preferably 1 or 2. Examples of the compound represented by the general formula (9) include mono-tert-butylcatechol.

(E) In the compound represented by the general formula (10), examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ² include R ¹ in the general formula (9) The same examples as the examples of the hydrocarbon group having 1 to 30 carbon atoms can be mentioned, and the examples of the preferable ones are also the same. The substitution position of the hydroxyl group is arbitrary, but when it has two or more hydroxyl groups, it is preferable to substitute an adjacent carbon atom. m ² is preferably an integer of 1 to 3, and more preferably 2. n ² is preferably 0-3 integer, more preferably 1 or 2. Examples of the compound represented by the general formula (10) include 2,2-dihydroxynaphthalene and 2,3-dihydroxynaphthalene.

Examples of the (F) polyoxyalkylene compound include compounds represented by the following general formula (11) or (12). R ³ 0-(R 0) _m3 -R ⁵ (1 1)

[In the general formula (11), R ³ and R ⁵ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, R ⁴ represents an alkylene group having 2 to ⁴ carbon atoms, and m ³ Represents an integer such that the number average molecular weight is from 100 to 350. ]

A-[(R ⁶ 0) _{n 4} -R ⁷ ] _m4 (1 2)

[In the general formula (12), A represents a residue obtained by removing some or all of the hydrogen atoms of the hydroxyl group of a polyhydric alcohol having 3 to 10 hydroxyl groups, and R ⁶ has 2 to 4 carbon atoms. Represents an alkylene group, R ⁷ represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and n 4 represents an integer having a number average molecular weight of 100 to 350, m ⁴ represents the same number as the number of hydrogen atoms removed from the hydroxyl group of A. ]

In the general formula (11), at least one of R ³ and R ⁵ is preferably a hydrogen atom. As the hydrocarbon group having 1 to 30 carbon atoms represented by R ³ and R ⁵ , for example, the carbon group represented by R ¹ and R ³ in the above general formulas (9) and (10) is 1 The same examples as the examples of the hydrocarbon groups of to 30 can be given, and the examples of the preferred groups are also the same. Specific examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁴ include an ethylene group, a propylene group (a methylethylene group), and a butylene group (an ethylethylene group). m ³ is preferably an integer such that the number average molecular weight is from 300 to 200, more preferably an integer such that the number average molecular weight is from 500 to 150.

In the above general formula (12), specific examples of the polyhydric alcohol having 3 to 10 hydroxyl groups constituting A include glycerin and polyglycerin (glycerin dimer to tetramer, for example, , Diglycerin, triglycerin, tetraglycerin), trimethylol / reanolecan (trimethylolethane, trimethylolpropane, trimethylol- leptane) and their dimer to tetramer, pentaerythritol, dipentaerythritol, -1, 2, 4 butane 1,3,5-pentantonolone, 1,2,6-hexanetrione, 1,2,3,4-butanetolone, sonorebitone, sonorebitan, sorbitol glycerin condensate, Polyhydric alcohols such as adotonitol, arabitol, xylitolone, mannito tonile, iritoto / re, tari tonole, zunolesitol, and aritol; xylose, arabinose, ribose, rhamnose, dulcos, f / rex Sugars such as toose, galactose, mannose, sonorebose, cellobiose, mantose, isomanthose, trehalose, and sucrose can be mentioned. Among them, glycerin, polyglycerin, trimethylolalkane, dimer or tetramer thereof, pentaerythritol, dipentaerythritol, sorbitol, or sorbitan are preferable.

Examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁶ include the same as the examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁴ in the general formula (11). Can be mentioned. Examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ⁷ include the hydrocarbon group having 1 to 30 carbon atoms represented by R ¹ in the general formula (9). The same can be mentioned, and examples of preferable ones are also the same. It is preferable that at least one of m ⁴ R ⁷ is a hydrogen atom, and it is more preferable that all of them are hydrogen atoms. n ⁴ is the preferred properly integers such that the number average molecular weight of 3 0 0-2 0 0 0 is an integer, such as more preferably a number average molecular weight is 5 0 0-1 5 0 0.

(G) As the ester, the alcohol constituting the ester may be a monohydric alcohol or a polyhydric alcohol, and the carboxylic acid may be a monobasic acid or a polybasic acid.

Examples of the monohydric alcohol and the polyhydric alcohol constituting the ester include the same monohydric alcohols and polyhydric alcohols as exemplified in the description of the ester as the base oil. More preferred The same is true. Examples of the monobasic acid and polybasic acid constituting the ester are the same as the monobasic acid and polybasic acid exemplified in the description of the ester as the base oil. The same applies to more preferable ones.

The combination of alcohol and carboxylic acid can be any combination, and is not particularly limited. For example, the following combinations can be mentioned.

(i) Ester of monohydric alcohol and monobasic acid

(ii) Ester of polyhydric alcohol and monobasic acid

(iii) — esters of polyhydric alcohols and polybasic acids

(iv) Ester of polyhydric alcohol and polybasic acid

(v) A mixture of a monohydric alcohol or a polyhydric alcohol with a polybasic acid

(vi) Mixed ester of polyhydric alcohol with a mixture of monobasic acid and polybasic acid

(vii) Mixed esters of mixtures of monohydric alcohols and polyhydric alcohols with monobasic acids and polybasic acids

When a polyhydric alcohol is used as the alcohol component, a complete ester in which all of the hydroxyl groups in the polyhydric alcohol are esterified may be used, or a part of the hydroxyl groups may not be esterified and remain as hydroxyl groups. It may be a partial ester. When a polybasic acid is used as the carboxylic acid component, a complete ester in which all of the carboxyl groups in the polybasic acid are esterified may be used, or a part of the carboxylic acid group may not be esterified and remain as a carboxyl group. May be a partial ester.

There is no particular limitation on the total carbon number of the ester as an oil agent, but in order to obtain an effect of improving lubricity and processability, an ester having a total carbon number of 7 or more is preferred. Preferably, 9 or more esters are more preferred, and 11 or more esters are most preferred. In order not to increase the occurrence of sting or corrosion, esters having a total carbon number of 60 or less are preferred, esters of 45 or less are more preferred, esters of 26 or less are still more preferred, and esters of 24 or less are preferred. Particularly preferred, 22 or less esters are most preferred.

As the oil agent, only one selected from the above various oil agents may be used, or a mixture of two or more types may be used. Among them, one or a mixture of two or more selected from (A) alcohol and (B) carboxylic acid is preferable.

The content of the oily agent is not particularly limited, but is preferably 0.1% by mass or more, more preferably 0.2% by mass, based on the total amount of the processing oil, in order to obtain lubricity such as high machinability. mass. / ₀ or more, most preferably 0.5% by mass or more. The upper limit of the content of the oil agent is preferably 30% by mass or less, more preferably 2 ° by mass, so as not to increase the occurrence of sting or corrosion. / ₀ or less, more preferably 10% by mass or less.

Further, conventionally known additives other than those described above can be added to the processing oil used in the present invention. Examples of such additives include extreme pressure additives other than the above-mentioned phosphorus compounds and sulfur compounds (including chlorine-based extreme pressure agents); wetting agents such as dimethylene glycol monoalkyl ether; acrylamide polymers; Film forming agents such as raffin wax, micro wax, slack wax, and polyolefin resin; water replacement agents such as fatty acid amine salts; solid lubrication such as graphite, fluorinated graphite, molybdenum disulfide, boron nitride, and polyethylene powder Agents: Corrosion inhibitors such as amines, alkanolamines, amides, carboxylic acids, carboxylates, sulfonates, phosphoric acids, phosphates and partial esters of polyhydric alcohols; benzotriazoles, thiadiazole, etc. Metal deactivator; methylsilicon, fluorosilicon, poly Antifoaming agents such as atalylate; ashless dispersants such as alkenylsuccinic acid imid, benzylamine, polyalkenylamine aminoamide; and the like. The content when these known additives are used in combination is not particularly limited, but is such an amount that the total content of these known additives is 0.1 to 10% by mass based on the total amount of the processing oil. It is common to add.

When using the above-mentioned additives for processing oil, it is necessary to select the type and content of additives that do not adversely affect the refrigerant circulation system (such as blockage of the expansion mechanism). More preferably, in order to minimize the adverse effect on the refrigerant circulation system, it is more preferable to use a processing oil that does not contain the above-mentioned processing oil additive.

Further, the processing oil used in the present invention may contain the additives (additives for refrigerator oil) exemplified in the above description of the refrigerator oil.

When the processing oil contains a refrigerating machine oil additive, the content of the refrigerating machine oil additive need not necessarily be the same in each of the processing oil and the refrigerating machine oil. That is, in the present invention, the refrigerating machine oil may be used as it is as the processing oil, the amount of the additive compounded in the refrigerating machine oil may be different, or the additive in the refrigerating machine oil may be used. Oils in which one or more of them are not mixed may be used as processing oil. Furthermore, those in which the above-mentioned additives for processing oil are blended can also be used.

As described above, the processing oil used in the present invention may be a base oil, an additive for a processing oil such as an antioxidant and an oily agent that is added as necessary, In order to minimize the adverse effects on the refrigerant circulation system (clogging of the expansion mechanism, etc.), the base oil of the processing oil must be the same as the base oil of the refrigerating machine oil. When both the processing oil and the refrigerating machine oil contain the ester described above, the effect of suppressing the adverse effect on the refrigerant circulation system becomes more remarkable. Also, It is preferable that the base oil substantially consist of the base oil of the refrigerating machine oil, or that the base oil substantially consist of the base oil of the refrigerating machine oil and an antioxidant and Z or an oil agent. Further, it is more preferable to use a processing oil having the same composition as the refrigerating machine oil, that is, to use the refrigerating machine oil as it is as the processing oil.

It is preferable to use a processing oil containing the above oily agent when importance is attached to the improvement of processing accuracy, and to use the above antioxidant when importance is attached to the improvement of stickiness prevention. It is preferable to use a processing oil containing

Although the kinematic viscosity of the processing oil used in the present invention is not particularly limited, the upper limit value of the kinematic viscosity at 40 ° C. may be 200 mm ² / s from the viewpoint of easy supply to the application portion. preferably, more preferably 1 0 0 mm ² / s, still more preferably 7 5 mm ² / s, and most preferably 5 0 mm ² Z s. On the other hand, the lower limit is preferably 3 mm ² Z s, more preferably from 5 mm ² / s, Ru and most preferably ⁷ mm ^2/7 s der.

(Cutting / grinding method)

In the present invention, when cutting and grinding a refrigerator component, first, a working oil is supplied to a working portion of a workpiece with a compressed fluid. The processing oil supplied in this manner is usually misted, and the supply amount is 1 / 10000-00: LZ compared to the amount of processing oil used in the conventional cutting and grinding method. It is about 100 000 000, more specifically, usually 1 milliliter Z or less. Hereinafter, such a processing oil supply method is referred to as a trace amount oil supply method.

In the method for cutting and grinding a refrigerator component according to the present invention, by supplying a processing oil to a processing portion by a very small amount of oil supply method, a sufficient amount of the processing oil can be used while maintaining a sufficiently high processing accuracy. Can be reduced to The refrigerating machine part obtained can be suitably used as a part of the refrigerant circulation system without washing or with very simple washing. Further, since the amount of processing oil used is sufficiently reduced, it is possible to sufficiently reduce the amount of processing oil waste.

In addition, conventional cutting which does not depend on the trace amount oil supply method ■ In the grinding method, water-insoluble or water-soluble cutting ■ If the removal of the grinding oil is insufficient, it is constituted by the refrigerating machine parts obtained. Of refrigerant oil in lubrication, refrigerant compatibility, thermo-chemical stability, electrical insulation, etc. of refrigerant oil; precipitation of processing oil or specified components from refrigerant / refrigeration oil mixture A phenomenon such as generation of sludge due to the reaction between the processing oil or a predetermined component thereof and the refrigerating machine oil tends to occur. Furthermore, such a cutting / grinding method requires a large amount of processing oil waste, which is not sufficient in terms of environmental protection.

In addition, Japanese Patent Application Laid-Open No. 6-218800 discloses a method of using a low-viscosity ester oil which is liquid at normal temperature when treating a refrigerator component using a hydrogen-containing Freon refrigerant. However, the processing method described in this publication is based on a conventional oil supply system that does not use a compressed fluid, and has a different configuration from the method of the present invention.

That is, in the conventional method, a large amount of processing oil containing wear powder adheres to the surface of the refrigerator component after processing, and is derived from the wear powder, processing oil or a part thereof, and additives contained in processing oil In order to remove the film and the like, it is necessary to provide a washing step as described in JP-A-6-21880.

In addition, in the conventional method, when a low-viscosity ester oil is used alone as a processing oil, sufficient processing accuracy cannot be obtained, and further, even if the amount of additives such as extreme pressure agents is increased, the processing is increased. It is very difficult to improve the accuracy sufficiently. In addition, processing oil containing a large amount of additives such as extreme pressure agents If it is used, tools and refrigerator components are likely to corrode.

On the other hand, in the method of cutting and grinding a refrigerator component of the present invention, since a very small amount of processing oil is used, there is almost no adverse effect when performing a surface treatment on the processed refrigerator component. In addition, there is an advantage that the possibility of corroding copper parts is small and that the processing oil or a part thereof or the coating film can be sufficiently prevented from being mixed into the refrigerant circulation system.

In the method for cutting and grinding a refrigerator component according to the present invention, since the processing oil is supplied as an oil mist, if the processing oil adheres to the inside of the machine tool, the work, the tool, the mist collector, etc., the sticking phenomenon may occur. It may cause trouble in handling and decrease the work efficiency. For this reason, the processing oil used in the present invention is required to have high anti-stickiness. As the compressed fluid used in the present invention, compressed air, nitrogen, argon, helium, carbon dioxide, water, or a mixture of two or more of these can be used. These compressed fluids are adjusted to a pressure such that the processing oil does not scatter and contaminate the atmosphere, and a mixture of the processing oil and the compressed fluid can sufficiently reach the processing site. In addition, the temperature of the compressed fluid is usually adjusted to 50 ° C to room temperature (about 25 ° C) from the viewpoint of cooling properties.

In machine tools used in conventional cutting and grinding methods, the lubricating oil is required by the lubricating parts such as cutting and grinding parts, sliding surfaces (sliding guide surfaces), bearings, gears, and hydraulic equipment. Since the characteristics are different, separate lubricating oils are generally used for processing oil, sliding surface oil, bearing oil, gear oil, hydraulic oil, and the like.

On the other hand, the cutting of the refrigerator component of the present invention.

In particular, when the base oil of the processing oil is an ester, the processing oil can be suitably used as a combined oil with a sliding surface oil, a bearing oil, a gear oil, a hydraulic oil, and the like. Space and energy savings can be achieved. In the present invention, the sliding surface oil refers to a lubricating oil used for a guide mechanism of a sliding motion of two abutting surfaces, among components provided in a machine tool used for cutting and grinding. For example, in a machine tool in which a workpiece is placed on a table movable on a bed, and the table is moved to transport the workpiece to a cutting / grinding tool, the table and the bed may be connected to each other. The sliding surface between them is lubricated with the sliding surface oil. Further, in a machine tool in which a cutting / grinding tool is fixed on a table movable on a bed and the table is moved to move the tool toward a workpiece, a space between the table and the bed is provided. Is lubricated with the sliding surface oil.

When the base oil of the processing oil used in the present invention is an ester, the processing oil can be suitably used as an oil shared with the sliding surface oil as described above. It is preferable to further contain Z or a sulfur compound because higher friction characteristics can be obtained. At this time, it is preferable to select a phosphorus compound and a sulfur compound that have a small adverse effect on the refrigerant circulation system.

There are lubrication methods such as oil bearing lubrication and mist bearing lubrication for the lubrication of the bearing part.If the base oil of the processing oil according to the present invention is an ester, any of these lubrication methods can be used. Can also be used.

Oil bearing lubrication refers to a lubrication method in which lubricating oil is supplied to the bearing portion in a liquid state to ensure smooth sliding of the portion, and cooling of the bearing portion by the lubricating oil can be expected. Such lubricating oils for bearing lubrication are required to be used in higher temperature parts and therefore not easily deteriorate due to heat, that is, they are required to have excellent heat resistance. In some cases, the processing oil can be suitably used as a bearing oil for lubricating oil bearings.

With mist bearing lubrication, lubricating oil is atomized by a mist generator, and the mist oil is supplied to the bearings in the hope of air, etc., to ensure smooth sliding of the relevant parts. The lubrication system means a lubrication system, which can be expected to have a cooling effect by air or the like in high-temperature parts such as bearings. Therefore, recent machine tools often use this lubrication system. Such lubricating oils for mist lubrication are required to be resistant to thermal degradation because they are used in higher temperature areas, that is, to be excellent in heat resistance. In this case, the processing oil can be suitably used as bearing oil for lubricating mist bearings.

The gear portion is a portion mainly driven by a gear provided on a gear cutting machine or the like. Gear oil is used to smoothly slide the gear portion and reduce metal-metal contact. used. Since high loads are applied to the sliding surfaces of gears, gear oils are required to have high abrasion resistance and lubrication properties such as anti-seizure resistance. In the present invention, when the processing oil contains an ester as a base oil, the processing oil can be suitably used as a combined oil with such a gear oil. (Abrasion resistance and seizure resistance). In addition, since higher lubricity is obtained, the dual-purpose oil preferably contains a phosphorus compound and / or a sulfur compound, but the phosphorus compound and the sulfur compound are supplied to the refrigerant circulation system. It is preferable to select a material that has a small adverse effect.

Hydraulic equipment performs the operation and control of machines with hydraulic pressure. The hydraulic control part that controls the operation of machinery uses hydraulic fluid that is expected to have lubrication, sealing, and cooling effects. Hydraulic fluids use a pump to compress the lubricating oil to a high pressure, generate hydraulic pressure, and operate equipment.Thus, lubricating oils must have high lubricity, high oxidation stability, and thermal stability. When is an ester, the processing oil can be used as a hydraulic oil. When a processing oil containing an ester as a base oil is used as a hydraulic oil, the oil also contains the above-mentioned phosphorus compound and Z or sulfur compound in order to further improve its lubricity. Preferably, the phosphorus compound and the sulfur compound It is preferable to select a material that has a small adverse effect on the refrigerant circulation system.

FIG. 1 is an explanatory view showing an example of a machine tool suitably used in the cutting method and grinding method of the present invention. The machine tool shown in FIG. 1 includes a table 2 movable on a bed 1 in the direction of an arrow, and a tool 11 supported on supporting means 10 and rotatable in the direction of an arrow. The refueling tank 12 contains an oil based on an ester base oil. When the workpiece 3 placed on the table 2 is cut and ground, the compressed air introduction section 18 Along with the sent compressed air, mist-like oil is supplied from the processing oil supply unit 13 toward the processing site. The oil contained in the oil supply tank 12 is supplied from the oil supply unit 14 for the sliding surface to the sliding surface 16 between the bead 1 and the table 2, and the oil supply unit for the bearing is also provided. The lubrication of the sliding surface 16 and the bearing portion 17 is performed by supplying from 15 to the bearing portion between the support means 10 and the tool 11.

In this way, using the oil containing the same ester to lubricate the cutting part, the grinding part, the sliding surface of the machine tool, or the bearing part, it is possible to perform a very small amount of oil supply type cutting. It is preferable because the improvement of workability and the improvement of work efficiency are achieved.

Also, as shown in Fig. 1, if the same oil is used as the oil for cutting and grinding, the oil for the sliding surface, or even the oil for the bearing, the oil supply tank for supplying each oil is separately provided. This is more preferable because it eliminates the need to install them in a space, and it is possible to achieve space saving and energy saving for machine tools.

Although not shown in FIG. 1, in the cutting / polishing method of the present invention, the oil contained in the oil supply tank 12 is supplied to a hydraulic device provided in the machine tool, Use the oil agent of the present invention as a hydraulic fluid You can also. Further, the oil agent stored in the oil supply tank 12 can be supplied to a gear portion provided in the machine tool, and the oil agent can be used as an oil agent for a gear portion.

[Example]

Hereinafter, the present invention will be described more specifically based on Examples and Comparative Examples.

However, the present invention is not limited to the following examples.

Examples 1 to 18

In Examples 1 to 18, processing oils having the compositions shown in Tables 1 to 3 were prepared using the base oils and additives shown below. Tables 1 to 3 show the kinematic viscosities of the obtained processing oil at 40 ° C. Tables 1 and 2 show the iodine value, bromine value, hydroxyl value and saponification value of the processing oils of Examples 1 and 12.

(Base oil)

A 1: Diester of neopentinoleglycol and oleic acid (kinematic viscosity at 40 ° C: 22 mm ² / s)

A2: Triester of trimethylolpropane and oleic acid (kinematic viscosity at 40 ° C: 47 mm ² / s)

A3: Tetraester of trimethylolpropane and n-hexanoic acid / n-octanoic acid Zn-decanoic acid mixed acid (mixing molar ratio 7:59:34) (kinematic viscosity at 40 ° C: ² 0 mm 2 / s)

A4: Tetraestenol of pentaerythritol and n-octanoic acid (4

Kinematic viscosity at 0 ° C: 46 mm ² / s)

A 5: (kinematic viscosity at 4 0 ° C: 3 5 mm 2 / s) commercial canola oil A 6: monoesters of glycerin and Orein acid

A 7: Polypropylene glycol monobutyl ether (Kinematic viscosity at 40 ° C: 40 mm ² Z s)

A8: Hard alkyl benzene (Kinematic viscosity at 40 ° C: 22 mm ² / s)

A 9: Copolymer of burethyl ether and vinylisobutyl ether (bierethyl ether Z vinylisobutyl ether ratio (molar ratio): 7/1, kinematic viscosity at 40 ° C: 68 mm ² / s ;).

(Additive)

B 1: Triclezinol phosphate.

B 2: Sulfuric ester (sulfur content: 9.9% by mass, inactive type) B 3: 2-Echinolehexinole glycidinoleate

B4: 2, 6—di-tert.

Next, the following tests were performed using the processing oils of Examples 1 to 18.

(Evaluation of lubricity (tapping test))

Using each processing oil and the comparative standard oil (DIDA: disodecyl adipate) alternately, under the following conditions:

Tubbing conditions

Tool: Nut tap M8 (P = 1.25 mm)

Prepared hole diameter: φ 7.2 mm

Work: S25C (t = 10 mm)

Cutting speed: 9.0 m / min

Oil supply system

Each oil composition: Compressed air 0.2 MPa Oil composition 25 m1 Zh

D I D A: 4.3 mL / min sprayed directly onto the machined part without using compressed air

A tapping test was performed. Measure the tapping energy in each case and calculate the following formula:

Tapping energy efficiency (%) = (Tapping with DIDA Tapping energy efficiency (%) was calculated using (Tapping energy) / (Tapping energy in the case of using the oil composition). Tables 1 to 3 show the obtained results. In Tables 1-3, the higher the value of tapping energy efficiency, the higher the lubricity. When the same tapping process was performed while supplying only compressed air without using processing oil, the tapping energy efficiency was 80 ° /. Met.

(Auto crepe test)

According to the procedure shown below, an iron plate (S45C, 30 mm x 30 mm x 5 mm) was subjected to tapping, and an autoclave test was performed using the processed plate.

That is, using each processing oil, the following conditions:

Tubbing conditions

Tool: Nut tap M 8 (P = 1.25 mm)

Prepared hole diameter: 7.2 mm

Cutting speed: 9.0 m / min

Oil supply system

Tapping was performed by spraying under the conditions of compressed air of 0.2 MPa and an oil composition of 25 ml, h.

Next, the processed plate is made up of the following composition:

Mixed fatty acid of pentaerythritol and 2-ethylhexanoic acid, 3,5,5—trimethylhexanoic acid (2-ethylhexanoic acid 3,5,5—trimethylhexanoic acid ratio (molar ratio) 50/5 0) with tetraester) 95.3% by mass

Additive B 13 mass%

Additive B 2

Additive B 3 0.3% by mass Was sealed in an autoclave together with 90 g of a refrigerating machine oil having the above and a refrigerant (HFC-134A or R410A), and heated at 175 ° C for 2000 hours. After the test, the appearance of the plate and the presence or absence of sludge were observed, and the amount of change in the total acid value of the refrigerating machine oil was measured. The results obtained are shown in Tables 1-3.

(Evaluation test for non-stickiness)

Put 5 ml of oil on an aluminum dish (100 mm x 70 mm), leave it in a constant temperature bath at 70 for 33 36 hours, and then judge the degree of stickiness of the oil agent composition-attached area by touch. did. The mass average molecular weight before and after the test was measured by GPC, and the rate of change was determined. The results obtained are shown in Tables 1-3. The evaluation criteria for non-stickiness are as follows.

A: No stickiness

B: No or no stickiness

C: Slightly sticky

D: Sticky

E: Very sticky.

(Friction property evaluation test)

Using the apparatus shown in FIG. 2, the friction characteristics of each processing oil were evaluated according to the following procedure. In the apparatus shown in FIG. 2, the processing oil was dropped on the surface where the iron bed 1 and the iron table 2 were in contact. Next, a driving means composed of an A / C servo meter 4, a feed screw 5 and a movable jig 6 having a bearing is provided by placing the heavyweight 3 on the table 2 to achieve a surface pressure of 200 kPa. Caused the table 2 to reciprocate in the direction of the arrow. When the table 2 was reciprocated, the control panel 7 and the control means 8 controlled the feed speed to be 400 mm / min and the feed length to be 300 mm. After reciprocating the table 2 three times in this way, the load between the table 2 and the movable jig 6 at the fourth reciprocation was measured by the load cell 9, and the table and the bed were moved based on the obtained measurement values. But The average value of the friction coefficient of the contact surface (guide surface) was determined. Table showing the results obtained

Shown in 1-3.

(Abrasion resistance evaluation test)

By a high-speed four-ball test method, a wear test was performed at 3 Omin under a rotation speed of 180 rpm and a load of 3922 N, and the wear scar diameter was measured to evaluate the wear resistance of the processing oil. The results obtained are shown in Tables 1-3.

(Oxidation stability test)

25 ml of processing oil was placed in a 50 ml screw screw tube, and the total acid value change was measured when heated at 70 ° C for 4 weeks in air. The obtained results are shown in Tables 1 to 3.

(Seizure resistance evaluation test)

The load friction index (LW I) was determined at a rotational speed of 180 rpm according to AS TM D-27983-888. The results obtained are shown in Tables 1-3. In the table, the larger the value of LWI, the better the seizure resistance.

: ^: Ffil Gris heaven sword E] 5 "J dog chestnut ΛΕΊ chestnut: ^; sword El-click ¹ J

1 2 3 5 β

A1 ςη Re dq 75 48.25 7.25 47.25

A2 5Π 48.5 49.75 48.25 47.25 47.25

A3

A4

Composition

A5 one __ one

[Mass%]

A6 1 1 1 1 1

B1 one 3 one 3 2

B2 One-One 5 3

B4 ― 0.5 0.5 0.5 0.5 Kinematic viscosity (40 ° C) [mmVs] 35 35 35 35 35 35 Iodine value 81 80 81 81 82 81 Bromine value [gBr ₂ / 100g] 51 5 50 5 OH value [mgKOH / g] 1.09 Saponification value [mgKOH / g] Ι ου I o I 1 I o onU I OU 1 I o onU Tatsupin generki '-efficiency [%] 98 110 98 111 109 115

Plate appearance No change No change No change No change No change No change No change * f

Presence / absence None None None Ichi, Ichishin ¹ Shinichi ¹

Total acid value change

(HFC-134a) 0.02 0.02 0.01 0.02 0.01 0.02

[mgKOH / g]

Plate appearance No change No change No change No change No change No change Autoclave

Presence / absence of slush, Shina I Shina I, Shine I Shina 1 Change in total acid value

(R410A) 0.03 0.02 0.01 0.03 0.03 0.02

[mgKOH / g]

Anti-stickiness C C A A A A Average friction coefficient 0.1 5 0.131 0.146 0.132 0.133 0.13 Wear scar diameter [Aim] 0J0 0.60 0.61 0.61 0.61 0.58 Change in total acid number

0.21 0.18 0.02 0.01 0.03 0.01 [mgKOH / g]

LWI [N] 220 305 215 310 305 320

Table 2

Lost ¾1 TA ¹ J 夷 i¾1 TALI 1 Tali Kaya 1 Tali 她 1 Tali

7 o Q

1 o 1 1

A1

A2 1 uu Q7

A3 i nn

A4 i nn

Composition

A5 100

[mass. /. ]

A6 10

B1 3 _

B2 1 1 1 1 1

B4 one

Kinematic viscosity (40 ° C) [mmVs] 35 46 20 20 32 35 Iodine value 81 85 0.2 1 114 81 Bromine value [gBr ₂ / 100g] ΌΌ n 1

Hydroxyl value [mgKOH / g] 2 1.8 Z U.O 3 35 Saponification value [mgKOH / g] 180 184 340 348 173 180 180 Tatsupingenereki '-efficiency [98 110 94 94 90 103

Plate appearance No change No change No change No change No change No change Auto crepe

With / without slashes None None None None None None Testing

(HFC-134a) Change in total acid value

0.03 0.01 0.01 0.01 0.02 0.03 Amount [mgKOH / g]

Presence or absence of sludge 1 and 1 and 1 (R410A) Change in total acid number

0.01 0.02 0.03 0.02 0.03 0.04 Amount [mgKOH / g]

Anti-stickiness C C B A D C Average friction coefficient 0.147 0.133 0.147 0.144 0.147 0.138 Wear scar diameter [m] 0.71 0.61 0.69 0.69 0.75 0.58 Change in total acid number

0.25 0.22 0.10 0.1 1 0.29 0.24 [mgKOH / g]

LWI [N] 230 320 220 225 215 285

Three

Example Example Example Example Example Example

1 o 1 I 0 I 0 1 I 7/1

I o Composition A

»0./yo./

[Mass ⁰ /. ] A8 yo.1 ao.1

A9 yo./ yo./

A10--

B1 3

B2

B3 1 1 1 1 1 1

B4 0.3 0.3 0.3 0.3 0.3 0.3 Kinematic viscosity (40 ° C) [mmVs] 40 40 22 22 68 68 Tatsu pink 'Enel-'-Efficiency [%] 89 91 88 93 89 90 Autoclave

Plate appearance No change No change No change No change No change No change Test

(HFC-134a) Slurry V None None None None None None Change in total acid number

0.02 0.03 0.01 0.01 0.03 0.03 Amount (mgKOH /

Otoclef'ι

Plate Appearance No it No No 1D No 1u No ¾11 No No 1 No No No No No No Test

(R410A) Presence or absence of slush 'None None None None None None Total acid value change

u.u no n no 1 u.uo

Amount [mgKOH / g]

Anti-stickiness A A A A A A A Average coefficient of friction 0.149 0.148 0.149 0.149 0.147 0.147 Wear scar diameter [jU m] 0.72 0.71 0J4 0.7 0.74 0.73 Total acid value change

0.05 0.05 0.02 0.02 0.03 0.04 [mgKOH / g]

LWI [N] 200 295 210 310 210 300

Comparative Examples 1 to 19

In Comparative Examples 1 to 19, processing oils having compositions shown in Tables 4 to 6 were prepared using the above base oils and additives, and the following base oils and additives, respectively. Tables 4 to 6 show the kinematic viscosities of each processing oil at 40 ° C. Tables 4 and 5 show the iodine value, bromine value, hydroxyl value and saponification value of the processing oils of Comparative Examples 1 and 12.

(Base oil)

A 10: Mineral oil (Kinematic viscosity at 40 ° C: 22 mm V s) ₀

(Additive)

B 5 ： Ca snorre honey

B6: ZnDTP.

(Autoclave test)

The same as Examples 1 to 18 except that the processing oil of Comparative Examples 1 to 19 was used and the processing oil was supplied directly to the processing site at 4.3 ml / min without using compressed air when supplying the processing oil. Then, a tabbed iron plate was obtained. The plate was placed in a petroleum-based cleaning agent, shaken for 20 minutes, and dried at 60 ° C for 5 minutes.

Next, the same autoclave test as in Examples 1 to 18 was performed using the obtained plate. Tables 4 to 6 show the obtained results.

Table 4

Toto i flat apiv M 1 1 1 "toshihirama 棚棚 ¾¾ y y: \ リリ ί 乂 ί 乂 ν ί ククククク ί Χ Χ Χ Χ fi fi fi fi fi fi ¾X. Μ 1 chestnut

1 9 3 4 5 g

A1 AO A.1? 5

A2 50 48.5 49.75 48.25 47.25 47,25

A3

A4

Composition

A5 one _

[% By mass]

A6 I-I-I-I-I

B1 3 3 2

B2-5 3

B4 0.5 0.5 0.5 0.5 Kinematic viscosity (40 ° C) [mmVs] 35 35 35 35 35 35 Iodine value Q

o I onoo I Bromine value [gBr ₂ / 100g] 52 52 51 52 50 52 Hydroxyl value [mgKOH / g] 2.5 2 1.5 2.5 2.5 2 Saponification value [mgKOH / g] 180 181 180 180 182 180 Slight black, black , Frame appearance browning browning

Browning Browning Gloss reduction Gloss reduction Ability of professor 'slush' No Yes Yes No Kao 1 Yes Yes Yes No test

(HFC-134a) Change in total acid value

Amount 0.08 0.07 0.06 0.06 0.09 0.09 [mgKOH / g]

Slight blackening, blackening, flat appearance Browning Browning

Browning Browning Luster reduction Gloss reduction

No slightly yes no slightly yes yes no no

(R410A) Change in total acid value

Amount 0.11 0.21 0.15 0.18 0.25 0.27 [mgKOH / g]

Table 5

Comparative example Hihiya father example Hi¾ father ratio father example

/ 8 9 10 11 12

A1 45

A2 100 y 1 45

A3 1 UU

A4 1 UU

Composition

A5

[% By mass]

A6 1 stroke n u

B1

B2-----

B4

Kinematic viscosity (40 ° C) [mmVs] 35 46 20 20 32 35

Large gl value 81 85 0.2 1 114 81 bromine value [gBr ₂ / 100g] 52 56 0.1 1 73 52 hydroxyl value [mgKOH / g] 2 1.8 2 0.5 3 35 saponification value [mgKOH / g] 180 184 340 348 173 180 Slightly slightly slightly slightly slightly slightly

H. Rate appearance J joined l ± i 1

Browning Browning Browning Browning Browning

Talent Clef '

With / without slush 'N / A Slightly N / A N / A Slightly test

(HFC-134a) Change in total acid value

匕 dangli 0.05 0.08 0.04 0.04 0.08 0.1 [mgKOH / g]

Slightly slightly slightly slightly slightly slightly

H. Rate appearance Graying Browning Browning Browning Browning Browning

Saiichi Trek Leaf '

With / without slush 'N / A Slightly N / A N / A Slightly test

(R410A) Change in total acid value

0.1 0.13 0.09 0.09 0.13 0.15 [mgKOH / g]

Table 6

早 Example ratio 父 λ ratio ¾λ ratio 例 λ ratio Ratio example

1

1 4 I 0 1 I 0 I 1 1 Ρ 1 I ο »

A "17 Ho. I

[Quality η

ϋ AO yo.

1

Do. 1 y ο. "17

A1 0 oU

B 1 1 3 1 3 1 3

B2 1 0

B3 1 1 1 1 1 1

B4 0.3 0.3 0.3 0.3 0.3 0.3

B5 5

B6 5 Kinematic viscosity (40 ° C) [mmVs] 40 40 22 22 68 68 22 year old tote clef-slightly slightly slightly

Displacement appearance Browning Browning Browning Browning Test Browning Browning Browning

Slightly slightly

(HFC-134a) Presence or absence of slush No No No Yes Yes Yes Yes Change in total acid value

0.05 0.08 0.06 0.07 0.1 0.1 2 0.25 Amount [mgKOH / g]

Autoclave * slightly slightly

Plate appearance Browning Browning Browning Browning Test Browning Browning Browning

Slightly slightly slightly

(R41 0A) Presence of slush 'No No No Yes Yes Yes Yes Change in total acid value

0.1 2 0.21 0.1 0.1 3 0.1 8 0.25 0.27 Amount [mgKOH / g]

As shown in Tables 1-3, in Examples 1-18, sufficiently high tabbing energy efficiency was achieved, and corrosion of plates and deterioration of refrigerator oil by processing oil were sufficiently prevented. It was confirmed that.

Examples 19 to 26, Comparative Examples 20 to 27

In Examples 19 to 26 and Comparative Examples 20 to 27, sample oils having the compositions shown in Table 7 were prepared using the base oils and additives shown below, respectively. Table 1 shows the kinematic viscosity of the obtained sample oil at 40 ° C. Table 1 shows the iodine value, bromine value, hydroxyl value and saponification value of sample oils 1 and 2. (Base oil)

A 1: Mixed fatty acid of pentaerythritol and 2-ethylhexanoic acid / 3,5,5-trimethylhexanoic acid (ratio of 2,3-ethylhexanoic acid 3,5,5-trimethylhexanoic acid: 50/5 0) and Tetraestenol (Kinematic viscosity at 40 ° C: 68 mm ² / s)

A2: Polypropylene glycol mono-mono phthalate (Kinematic viscosity at 40 ° C: 40 mm ² / s)

A 3: Hard alkynolebenzene (Kinematic viscosity at 40 ° C: 22 mm ² / s)

A4: Copolymer of vinylinoleethenolate and vinylinoleate soptinoleether (ratio of bi-noletyl ethereone / bielisobutyl ether (molar ratio): 7 Z1, kinematic viscosity at 40 ° C: 6 8 mm ² / s)

A5: Mineral oil (kinematic viscosity at 40 ° C: 22 mm ² / s).

(Additive)

B 1: Trik resino phosphate.

B 2: 2-ethylhexyl glycidyl ether

B 3: 2, 6—Gee t er t—Petite / Rhe ρ—Crezo

B 4: Esthenol sulfide B 5: Ca snorre honey B 6: Zn DTP.

Table 7

Next, the following tests were performed using the sample oils shown in Tables 8 and 9 as processing oil and refrigerator oil, respectively.

(Evaluation of lubricity (tapping test))

Using each processing oil and comparative standard oil (DIDA: diisodecyl adipate) alternately, under the following conditions:

Tubbing conditions

Tool: Nut tap M 8 (P = 1.25 mm)

Prepared hole diameter: Φ 7.2 mm

Work: S25C (t = 10 mm)

Cutting speed: 9.0 m / min

Oil supply system

Example 1 Processing oil of 9 to 26: Compressed air 0.2MPa, oil agent composition 25 Spraying processing oil under the condition of 5 m1 / h

Comparative Examples 20 to 27 Processing oil and DIDA: Directly spray to the processing area without using compressed air at 4.3 mL / xn in

A tapping test was performed. The tubbing energy in each case was measured and the following formula:

Tapping energy efficiency (%) = (Tapping energy when using DIDA) / (Tapping energy when using processing oil) was used to calculate tapping energy efficiency (%). Tables 8 to 9 show the obtained results. In Tables 8 to 9, the higher the value of tapping energy efficiency, the higher the lubricity. When the same tapping process was performed while supplying only compressed air without using the processing oil, the tapping energy efficiency was 80%.

(Auto crepe test) According to the procedure described below, an iron plate (S45C, 30mmX30mmX5mm) was subjected to tapping processing, and an autocrepe test was performed using the processed plate.

That is, using each processing oil, the following conditions:

Tubbing conditions

Tool: Nut tap M 8 (P = 1.25 mm)

Prepared hole diameter: 7 · 2 mm

Cutting speed: 9.0 m / min

Oil supply system

Example 1 Processing oils of 9 to 26: compressed air 0.2 MPa, oil composition 2

Spraying at 5 m 1 / h

Comparative Examples 20 to 27 Processing oil: Directly sprayed to the processing site without using compressed air under the condition of 4.3 m 1 / m i 11

The tapping process was performed.

Next, 90 g of refrigeration oil and refrigerant (HF C-13

4A or R410A) was sealed in an autoclave together with 10 g, and heated at 2000C for 2000 hours. After the test, the appearance of the plate and the presence or absence of sludge were observed, and the amount of change in the total acid value of the refrigerator oil was measured. Table 8 shows the obtained results.

To 9

Further, in Examples 19 to 26, the following tests were performed using sample oils 1 to 8.

(Evaluation test for non-stickiness)

5 ml of sample oil was placed on an aluminum dish (100 mm x 7 Omm), left in a thermostat at 70 ° C for 33 36 hours, and the degree of stickiness of the sample oil adhesion was judged by touch. . Table 8 shows the obtained results. The evaluation criteria for non-stickiness are as follows. A: No stickiness

B: No or no stickiness

C: Slightly sticky

D: Sticky

E: Very sticky.

(Friction property evaluation test)

Using the apparatus shown in FIG. 2, the friction characteristics of each sample oil were evaluated according to the following procedure. In the apparatus shown in Fig. 2, the sample oil was dropped on the surface of the iron bed 1 that was in contact with the iron table 2. Next, the heavyweight 3 is placed on the table 2 to achieve a surface pressure of 200 kPa, and the table is driven by a driving means composed of an AC servometer 4, a feed screw 5 and a movable jig 6 having a bearing. 2 was reciprocated in the direction of the arrow. When the table 2 was reciprocated, the control panel 7 and the control means 8 controlled the feed rate to be 400 mm / min and the feed length to be 300 mm. After reciprocating the table 2 three times in this manner, the load between the table 2 and the movable jig 6 at the fourth reciprocation is measured by the load cell 9, and the table and the bed are moved based on the obtained measurement values. The average value of the coefficient of friction of the surface (guiding surface) that abuts on was determined. Table 8 shows the obtained results.

(Abrasion resistance evaluation test)

A high-speed four-ball test was performed to perform a wear test of 30 min under a rotation speed of 180 rpm and a load of 392 N, and the wear scar diameter was measured to evaluate the wear resistance of the sample oil. Table 8 shows the obtained results.

(Oxidation stability test)

25 ml of the sample oil was placed in a 50 m1 screw tube, and the amount of change in the total acid value when heated at 70 in air for 4 weeks was measured. Table 8 shows the obtained results. (Seizure resistance evaluation test)

The load friction index (LW I) was determined at a rotational speed of 180 rpm according to AS TM D-27983-888. Table 8 shows the obtained results. Incidentally, ₀ indicates the superiority in the table, as the value of LW I is large seizure resistance

Table 8

Example 19 Example 20 Example 21 Example 22 Example 23 Example 24 Example 25 Example 26 Processing oil Sample oil 2 Sample oil 3 Sample oil 4 Sample oil 5 Sample oil 6 Sample oil 7 Sample oil 8 Refrigerator oil Sample Oil 1 Sample oil 2 Sample oil 3 Sample oil 4 Sample oil 5 Sample oil 6 Sample oil 7 Sample oil 8 Tatsu pink 'Energy'-efficiency 98 111 91 101 91 104 89 90

Auto appearance No change No change No change No change No change No change No change No change Autoclave's test

Slash 'N / A N / A N / A N / A N / A N / A N / A

(HFC-134a)

Total acid value change

u.u n (id u.uo n no

[mgKOH / g]

Plate appearance No change No change No change No change Talent-to-crepe test Presence / absence None None None None (R410A) Change in total acid value

0.03 0.05 0.02 0.05 [mgKOH / g]

Anti-stickiness AAAAAAAA Average friction coefficient 0.132 0.131 0.141 0.14 0.142 0.142 0.147 0.147 Wear scar diameter [m] 0.60 0.56 0J3 0.69 0J1 0.67 0J4 0J3 Change in total acid value [mgKOH / g] 0.03 0.06 0.05 0.11 0.05 0.05 0.06 0.07

LWI [N] 225 320 200 295 210 310 210 305

Table 9

Comparative Example 20 Comparative Example 21 Comparative Example 22 Comparative Example 23 Comparative Example 24 Comparative Example 25 Comparative Example 26 Comparative Example 27 Processing Oil Sample Oil 9 t + Oil if Sample Oil 9 Sample Oil 9 Sample Oil 9 Sample Oil 9. Sample oil 9 Refrigerator oil Sample oil 1 Sample oil 2 Sample oil 3 Sample oil 4 t source J Sample oil 6 Sample oil 7 Sample oil 8 Tatsu pink 'enele'-Efficiency [%] 105 105 105 105 105 105 105 105 Plate appearance Brown Tanning tanning tanning tanning tanning tanning tanning tanning

With or without slat V Yes Reed J fey Slightly slightly

(HFC-134a)

Total acid value change

0.22 0.32 0.35 0.38 0.11 0.18 0.4 0.43

[mgKOH / g]

Phlate appearance Browning Browning Browning Browning Auto-test

With or without slash 'Yes Yes Yes Yes (R410A)

Total acid value change

0.23 0.35 0.39 0.45 [mgKOH / g]

As shown in Table 8, in Examples 19 to 26, sufficiently high tapping energy efficiency was achieved, and the corrosion of the plate and the deterioration of the refrigerating machine oil by the processing oil were sufficiently prevented. confirmed.

Industrial applicability

As described above, according to the present invention, when cutting and grinding a refrigerator component, the quality of the refrigerator component is reduced. The mixing of the processing oil into the refrigerant circulation system is sufficiently prevented, and the processing accuracy is sufficiently improved. Can be achieved.

Claims

Scope of word blue

1. A method for obtaining a refrigerator component constituting a refrigerant circulation system of a refrigeration equipment for non-chlorine-containing refrigerant by cutting and grinding a workpiece.

A step of supplying a processing oil together with a compressed fluid to a processing portion of the workpiece;

Cutting and grinding the processing portion to which the processing oil is supplied; and

Refrigerator parts including cutting and grinding methods.

2. The method for cutting and grinding a refrigerator component according to claim 1, wherein the processing oil contains a base oil of a refrigerator oil used for the refrigerator.

3. The method according to claim 1, wherein the processing oil is based on an ester.