Cleaning oil composition

Abstract

To provide a cleaning oil composition which exhibits cleaning properties not only for an oil-based processing liquid but also for a water-based processing liquid without forming a W / O emulsion.SOLUTION: There is provided a cleaning oil composition which comprises the following components (A) and (B), a component (A): one or more base oils selected from the group consisting of mineral oil and a hydrocarbon-based synthetic oil, a component (B): a glycol ether compound having an organic property of 150 or more and an inorganic property of 100 to 150 in the organic conceptual diagram, wherein the content of the component (A) is 10 to 99 mass% based on the total amount of the cleaning oil composition, the content of the component (B) is 1 to 90 mass% based on the total amount of the cleaning oil composition and the total amount of the component (A) and the component (B) is more than 90 mass% and 100 mass% based on the total amount of the cleaning oil composition.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a cleaning oil composition. [Background technology]

[0002] The cleaning oil composition is used to remove processing fluids, etc., used during processing, from industrial products in the middle of processing and from final products, etc. Incidentally, the machining fluids include oil-based machining fluids that are substantially free of water and aqueous machining fluids that contain water. Cleaning oil compositions are excellent in removing oil-based machining fluids, but are inferior in removing aqueous machining fluids. In order to achieve more effective removal of machining fluids, etc., a cleaning agent composition that can effectively remove not only oil-based machining fluids but also aqueous machining fluids has been proposed (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-179287 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the cleaning composition described in Patent Document 1 requires the formation of a W / O emulsion by the application of a physical force, which requires a lot of time and effort and is therefore problematic in terms of cost.

[0005] Therefore, an object of the present invention is to provide a cleaning oil composition that exhibits cleaning properties not only for oil-based machining fluids but also for water-based machining fluids without forming a W / O emulsion. [Means for solving the problem]

[0006] According to the present invention, the following [1] to [3] are provided. [1] A cleaning oil composition comprising the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The content of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The content of the component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition, A cleaning oil composition, wherein the total content of the component (A) and the component (B) is more than 90 mass % to 100 mass % based on the total amount of the cleaning oil composition. [2] A method for using the cleaning oil composition according to the above item [1] for cleaning an object having a processing liquid adhering to its surface. [3] A method for producing a cleaning oil composition, comprising the step of mixing the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The blending amount of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The blending amount of the component (B) is 1 mass % to 90 mass % based on the total amount of the cleaning oil composition, A method for producing a cleaning oil composition, wherein a total blending amount of the component (A) and the component (B) is more than 90 mass % to 100 mass % based on the total amount of the cleaning oil composition. Effect of the Invention

[0007] According to the present invention, it is possible to provide a cleaning oil composition that exhibits cleaning properties not only for oil-based machining fluids but also for water-based machining fluids without forming a W / O emulsion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The upper and lower limit values ​​of the numerical ranges described in this specification can be combined in any way. For example, when "A to B" and "C to D" are described as numerical ranges, the numerical ranges "A to D" and "C to B" are also included in the scope of the present invention. In addition, unless otherwise specified, a numerical range of "lower limit value to upper limit value" described in this specification means not less than the lower limit value and not more than the upper limit value. In this specification, the numerical values ​​in the examples are numerical values ​​that can be used as upper or lower limits.

[0009] [Embodiments of cleaning oil composition] The cleaning oil composition of the present embodiment contains the following component (A) and component (B). Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The content of component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition. The content of component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition. In the cleaning oil composition of the present embodiment, the total content of the component (A) and the component (B) is more than 90 mass % to 100 mass % based on the total amount of the cleaning oil composition.

[0010] The present inventors have conducted extensive research in order to solve the above problems. As a result, they discovered that a cleaning oil composition containing specific components (A) and (B) with their contents appropriately adjusted exhibits cleaning properties not only for oil-based machining fluids but also for aqueous machining fluids, without forming a W / O emulsion. Based on these findings, the present inventors conducted further studies and completed the present invention.

[0011] The cleaning oil composition of the present embodiment is preferably composed only of component (A) and component (B), but may further contain other components other than component (A) and component (B) (hereinafter also referred to as "other components"). In the detergent oil composition of the present embodiment, the total content of component (A) and component (B) is, based on the total amount of the detergent oil composition, preferably 92% by mass to 100% by mass, more preferably 95% by mass to 100% by mass, even more preferably 96% by mass to 100% by mass, still more preferably 97% by mass to 100% by mass, even more preferably 98% by mass to 100% by mass, still more preferably 99% by mass to 100% by mass, and even more preferably 100% by mass.

[0012] Each component contained in the cleaning oil composition of the present embodiment will be described in detail below.

[0013] <Component (A)> The cleaning oil composition of the present embodiment contains component (A). Component (A) is one or more base oils selected from the group consisting of mineral oils and synthetic hydrocarbon oils. The cleaning oil composition exhibits cleaning properties against oil-based machining fluids by containing component (A), and also exhibits cleaning properties against water-based machining fluids by combining components (A) and (B). The component (A) may be used alone or in combination of two or more kinds.

[0014] Examples of mineral oils include atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oil, intermediate base crude oil, and naphthenic crude oil; distillate oils obtained by vacuum distillation of these atmospheric residual oils; and mineral oils obtained by subjecting the distillate oils to one or more refining processes such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining. These mineral oils may be used alone or in combination of two or more.

[0015] Examples of hydrocarbon synthetic oils include poly-α-olefin synthetic oils such as α-olefin homopolymers or α-olefin copolymers (e.g., α-olefin copolymers having 8 to 14 carbon atoms, such as ethylene-α-olefin copolymers); paraffin synthetic oils such as normal paraffin and isoparaffin; and the like. These synthetic hydrocarbon oils may be used alone or in combination of two or more.

[0016] Here, from the viewpoints of cleaning ability against oil-based processing fluids, odor reduction, and ease of handling, the mineral oil is preferably one or more types selected from the group consisting of naphthenic mineral oils and paraffinic mineral oils.

[0017] From the viewpoints of cleanability against oil-based machining fluids, ease of handling, and availability, the hydrocarbon synthetic oil is preferably a paraffinic synthetic oil, and more preferably a paraffinic synthetic oil containing isoparaffin.

[0018] Therefore, component (A) is preferably one or more oils selected from the group consisting of naphthenic mineral oils, paraffinic mineral oils, and paraffinic synthetic oils, and more preferably one or more oils selected from the group consisting of naphthenic mineral oils, paraffinic mineral oils, and paraffinic synthetic oils including isoparaffin.

[0019] The 40°C kinematic viscosity of component (A) is preferably 0.50 to 10 mm from the viewpoint of improving cleaning properties and drying properties after cleaning. 2 / s, more preferably 0.75 to 5 mm 2 / s, more preferably 1.00 to 3 mm 2 / s. In this embodiment, the 40° C. kinematic viscosity of the component (A) refers to a value measured in accordance with JIS K2283:2000.

[0020] <Ingredient (B)> The cleaning oil composition of the present embodiment contains component (B). Component (B) is a glycol ether compound having an organic character of 150 or more and an inorganic character of 100-150 in an organic conceptual diagram. The cleaning oil composition containing component (B) can have excellent cleaning properties against water-based machining fluids in combination with component (A). The component (B) may be used alone or in combination of two or more kinds.

[0021] Here, the organic conceptual diagram will be described. The organic conceptual diagram is described, for example, in "Organic Conceptual Diagram - Basics and Applications" (Koda Yoshio, Sankyo Publishing, 1984). In other words, the "organic conceptual diagram" is a diagram in which two factors, "organicity" due to the covalent bond chain in the carbon region and "inorganicity" due to the electrostatic effect present in the substituent (functional group), are quantified according to a predetermined rule for all organic compounds, and the organicity value is plotted on the X-axis and the inorganicity value is plotted on the Y-axis. The above document states that the magnitude of the organicity value in the organic conceptual diagram can be measured by the number of carbon atoms, represented by methylene groups, in the molecule of the organic compound, and further specifies that "the organicity value of one basic carbon atom is set to 20, taking the average value of the boiling point rise caused by the addition of one carbon atom in the organic compound with a carbon number of about 5 to 10, which is 20°C."

[0022] In this embodiment, the glycol ether compound as component (B) has an organic character of 150 or more and an inorganic character of 100-150 in the organic conceptual diagram. When both the organicity and inorganicity in the organic conceptual diagram satisfy the above ranges, excellent cleaning properties against aqueous machining fluids can be exhibited. Here, from the viewpoint of making it easier to improve the cleanability against aqueous machining fluids, the organicity is preferably 300 or less, more preferably 280 or less, even more preferably 260 or less, still more preferably 240 or less, and even more preferably 220 or less. Moreover, from the viewpoint of making it easier to improve the cleanability against aqueous machining fluids, the inorganicity is preferably 110-150, more preferably 120-150, and further preferably 130-150.

[0023] The glycol ether-based compound as component (B) can be used without any particular limitation as long as the organicity and inorganicity in the organic conceptual diagram satisfy the above-mentioned ranges. Preferred examples thereof include alkylene glycol monoalkyl ethers represented by the following general formula (1).

[0024] [ka]

[0025] In the above general formula (1), R 11 represents an alkyl group having 4 or more carbon atoms. R 12 represents an alkylene group having 2 or 3 carbon atoms. m1 is an integer from 1 to 5.

[0026] R 11 The alkyl group that can be selected as the radical has preferably 4 to 12 carbon atoms, more preferably 4 to 10 carbon atoms, even more preferably 4 to 8 carbon atoms, and even more preferably 4 to 6 carbon atoms.

[0027] R 11 The alkyl group that may be selected for may be straight-chain or branched. R 11 Specific examples of the alkyl group that can be selected for include an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, a 2-ethylhexyl group, an n-nonyl group, an n-decyl group, an n-undecyl group, and an n-dodecyl group. Among these, an n-butyl group, an isobutyl group, an n-hexyl group, or a 2-ethylhexyl group is preferred, and an n-butyl group, an isobutyl group, or an n-hexyl group is more preferred.

[0028] R12 is preferably an alkylene group having 2 carbon atoms from the viewpoint of easy availability of alkylene glycol monoalkyl ethers.

[0029] m1 is preferably 1 to 4, more preferably 1 to 3, even more preferably 2 or 3, and still more preferably 2, from the viewpoint of easily ensuring appropriate inorganicity and from the viewpoint of easy availability of alkylene glycol monoalkyl ether.

[0030] Preferred specific examples of alkylene glycol monoalkyl ethers include n-butyl diglycol (diethylene glycol mono-n-butyl ether), isobutyl diglycol (diethylene glycol monoisobutyl ether), n-hexyl diglycol (diethylene glycol mono-n-hexyl ether), and 2-ethylhexyl diglycol (diethylene glycol mono-2-ethylhexyl ether), and among these, n-butyl diglycol (diethylene glycol mono-n-butyl ether), isobutyl diglycol (diethylene glycol monoisobutyl ether), and n-hexyl diglycol (diethylene glycol mono-n-hexyl ether) are more preferred.

[0031] The alkylene glycol monoalkyl ether may be used alone or in combination of two or more kinds.

[0032] <Content of component (A), content of component (B)> In the cleaning oil composition of this embodiment, the content of component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, and the content of component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition. By ensuring that the content of component (A) is within the above range, the cleaning properties against oil-based machining fluids are ensured. Furthermore, by having the content of component (A) and the content of component (B) within the above ranges, the cleaning properties against aqueous machining fluids are exhibited. Here, the content of component (A) is preferably 15% by mass to 98% by mass, and more preferably 18% by mass to 97% by mass, from the viewpoint of improving the cleanability against oil-based machining fluids. Moreover, from the viewpoint of improving the cleanability against aqueous machining fluids, the content of component (B) is preferably from 2 to 85% by mass, and more preferably from 3 to 82% by mass. In addition, when the contents of component (A) and component (B) are within the above ranges, the total content of component (A) and component (B) is, as described above, based on the total amount of the cleaning oil composition, preferably 92% by mass to 100% by mass, more preferably 95% by mass to 100% by mass, even more preferably 96% by mass to 100% by mass, still more preferably 97% by mass to 100% by mass, even more preferably 98% by mass to 100% by mass, still more preferably 99% by mass to 100% by mass, and even more preferably 100% by mass.

[0033] <Distillation temperature of component (A) and component (B)> The component (A) and the component (B) contained in the cleaning oil composition of the present embodiment preferably have distillation temperature ranges close to or overlapping each other, which can improve the distillation recyclability. Specifically, the distillation temperature range of component (A) (the range from the initial boiling point to the 90% by volume distillation temperature of component (A)) is compared with the distillation temperature range of component (B) (the range of the boiling points of component (B)), and the difference between the minimum and maximum temperatures thereof is preferably within 80°C, more preferably within 70°C, even more preferably within 60°C, and even more preferably within 50°C. The initial boiling point and 90% by volume distillation temperature of component (A) refer to values ​​measured in accordance with JIS K2254:1998 (Petroleum products - Distillation test method). The boiling point of the component (B) means a value measured by atmospheric distillation.

[0034] <Other ingredients> The cleaning oil composition of the present embodiment may contain other components in addition to component (A) and component (B). However, from the viewpoint of improving the effects of the present invention, it is preferable that the content of other components is small. The content of other components is preferably less than 10 parts by mass, more preferably less than 5 parts by mass, even more preferably less than 3 parts by mass, still more preferably less than 2 parts by mass, even more preferably less than 1 part by mass, still more preferably less than 0.1 parts by mass, even more preferably less than 0.01 parts by mass, and even more preferably no other components are contained, relative to 100 parts by mass in total of components (A) and (B).

[0035] Examples of other components include antioxidants, rust inhibitors, and antistatic agents. The other components may be used alone or in combination of two or more.

[0036] Furthermore, the cleaning oil composition of the present embodiment does not contain water and exhibits cleaning properties not only for oil-based machining fluids but also for water-based machining fluids. Therefore, in the cleaning oil composition of the present embodiment, the water content is preferably less than 5 parts by mass, more preferably less than 4 parts by mass, even more preferably less than 3 parts by mass, still more preferably less than 2 parts by mass, even more preferably less than 1 part by mass, still more preferably less than 0.1 part by mass, and even more preferably no water is contained, relative to 100 parts by mass in total of components (A) and (B). In addition, the cleaning oil composition of the present embodiment exhibits cleaning properties not only for oil-based machining fluids but also for water-based machining fluids, even without forming a W / O emulsion. Therefore, the cleaning oil composition of the present embodiment is used for cleaning without forming a W / O emulsion. Therefore, the step of applying a physical force required for forming a W / O emulsion can be eliminated, and the labor and costs can be reduced.

[0037] [Physical properties of cleaning oil composition] The cleaning oil composition of the present embodiment preferably satisfies the following physical properties.

[0038] <Water displacement> The cleaning oil composition of the present embodiment has a water displacement property, measured by the method described in the examples below, of preferably less than 30 seconds, more preferably 15 seconds or less, even more preferably 5 seconds or less, and still more preferably 3 seconds or less.

[0039] [Method of manufacturing cleaning oil composition] The method for producing the lubricating oil composition of this embodiment is not particularly limited. For example, a method for producing a lubricating oil composition of the present embodiment includes a step of mixing the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The blending amount of the component (A) is 10% by mass to 99% by mass, based on the total amount of the cleaning oil composition, the blending amount of the component (B) is 1% by mass to 90% by mass, based on the total amount of the cleaning oil composition, and the combined blending amount of the components (A) and (B) is more than 90% by mass to 100% by mass, based on the total amount of the cleaning oil composition.

[0040] When other components other than component (A) and component (B) are blended, the other components may be blended simultaneously with component (A) and component (B) or may be blended separately. However, as described above, it is preferable that the cleaning oil composition of the present embodiment does not contain other components, and therefore, in the production method of the present embodiment, it is preferable that other components are not blended. After mixing the components, it is preferable to stir them by a known method to disperse them uniformly. The preferred embodiments of each of the above components are as described above.

[0041] [Uses of cleaning oil composition] The cleaning oil composition of the present embodiment has excellent detergency for oil-based machining fluids and water-based machining fluids. Therefore, the cleaning oil composition of the present embodiment is suitable for cleaning an object to be cleaned having a machining fluid attached to its surface. The machining fluid may be either an oil-based machining fluid or a water-based machining fluid, or both the oil-based machining fluid and the water-based machining fluid may be attached to the surface. The object to be cleaned is not particularly limited, but if the object to be cleaned is a metal, it is preferable because it is easier to achieve a relatively good cleaning effect. Among metals, iron and aluminum are preferable. Examples of metal objects to be cleaned include metal jigs and tools, metal processed products (e.g., hardened steel), etc. In addition, since the cleaning oil composition of the present embodiment has a low viscosity, even when the object to be cleaned is a precision part, the cleaning oil composition can reach every corner of the precision part and provide good cleaning properties. Furthermore, according to the present embodiment, there is also provided a method for using the cleaning oil composition, in which the cleaning oil composition is used for cleaning an object having a processing liquid adhering to its surface.

[0042] [One aspect of the present invention provided] In one embodiment of the present invention, the following [1] to [9] are provided. [1] A cleaning oil composition comprising the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The content of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The content of the component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition, A cleaning oil composition, wherein the total content of the component (A) and the component (B) is more than 90 mass % to 100 mass % based on the total amount of the cleaning oil composition. [2] The cleaning oil composition according to the above item [1], wherein the total content of the component (A) and the component (B) is 95% by mass to 100% by mass based on the total amount of the cleaning oil composition. [3] The cleaning oil composition according to the above [1] or [2], wherein the organicity of the component (B) is 150 or more and 220 or less. [4] The cleaning oil composition according to any one of the above [1] to [3], wherein the component (B) is a compound represented by the following general formula (1): [ka] [In the above general formula (1), R 11 R represents an alkyl group having 4 or more carbon atoms. 12 represents an alkylene group having 2 or 3 carbon atoms. m1 is an integer of 1 to 5. [5] In the general formula (1), R 11 The cleaning oil composition according to the above item [4], wherein represents an alkyl group having 4 to 6 carbon atoms. [6] The cleaning oil composition according to the above [4] or [5], wherein in the general formula (1), m1 is an integer of 2 to 3. [7] The cleaning oil composition according to any one of the above [1] to [6], which is used for cleaning an object having a processing liquid adhering to its surface. [8] A method for using the cleaning oil composition according to any one of the above items [1] to [7], which comprises using the cleaning oil composition for cleaning an object having a processing liquid adhering to its surface. [9] A method for producing a cleaning oil composition, comprising the step of mixing the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Ingredient (B): A glycol ether compound having an organic content of 150 or more and an inorganic content of 100 to 150 in the organic conceptual diagram. The blending amount of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The blending amount of the component (B) is 1 mass % to 90 mass % based on the total amount of the cleaning oil composition, A method for producing a cleaning oil composition, wherein a total blending amount of the component (A) and the component (B) is more than 90 mass % to 100 mass % based on the total amount of the cleaning oil composition. EXAMPLES

[0043] The present invention will be described in more detail with reference to the following examples, although the present invention is not limited to the following examples.

[0044] [Methods for measuring various physical properties] The physical properties of the raw materials used in each of the Examples and Comparative Examples were measured according to the procedures described below.

[0045] (1)Kinematic viscosity at 40℃ Measurements were performed in accordance with JIS K2283:2000. (2) Organicity and inorganicity based on the organic concept diagram Based on the contents described in "Organic Concept Diagram - Fundamentals and Applications" (Yoshio Koda, Sankyo Publishing, 1984) and the like, the organic and inorganic properties of component (A), component (B), and component (B') were calculated. Specifically, the organic value was set to 20 for each methyl group, methylene group, methine group, and quaternary carbon. However, when an iso-branch (a branch at the alkyl group terminal) was present, 10 was subtracted for each iso-branch to calculate the organic value. The inorganic value was set to 100 for each hydroxyl group and 20 for each ether group. The organic value of the benzene ring of benzyl glycol was set to 0, and the inorganic value was set to 15. The organic and inorganic nature of component (A) was determined by determining the median molecular weight by gas chromatography, and the molecular structure of the median molecular weight was estimated and calculated. (3) Distillation temperature of component (A) As the distillation temperature of component (A), the initial boiling point and the 90% by volume distillation temperature of component (A) were measured. The initial boiling point and the 90% by volume distillation temperature were measured in accordance with JIS K2254:1998 (Petroleum products - Distillation test method). (4) Distillation temperature of component (B) and component (B') The range of the boiling points of components (B) and (B') was measured as the distillation temperatures of components (B) and (B'). The boiling range was determined by atmospheric distillation.

[0046] [Examples 1 to 24, Comparative Examples 1 to 10] Detergent oil compositions having the compositions shown in Tables 1 and 2 were prepared and evaluated as described below. The units of the compounding compositions in Tables 1 and 2 are "mass %." The details of each component used in preparing the detergent oil compositions having the compositions shown in Tables 1 and 2 are described below.

[0047] <Component (A)> (A)-1: Naphthenic mineral oil 1 (Kinematic viscosity at 40°C: 1.62 mm 2 / s) (A)-2: Naphthenic mineral oil 2 (Kinematic viscosity at 40°C: 1.63 mm 2 / s) (A)-3: Naphthenic mineral oil 3 (Kinematic viscosity at 40°C: 1.45 mm 2 / s) (A)-4: Paraffin-based mineral oil (dynamic viscosity at 40°C: 1.45 mm 2 / s) (A)-5: Isoparaffinic synthetic oil (Kinematic viscosity at 40℃: 2.56mm 2 / s)

[0048] <Ingredient (B)> (B)-1: Butyl diglycol (diethylene glycol monobutyl ether) (B)-2: Isobutyl diglycol (diethylene glycol monoisobutyl ether) (B)-3: Hexyl diglycol (diethylene glycol monohexyl ether) (B)-4: 2-Ethylhexyl diglycol (diethylene glycol mono 2-ethylhexyl ether)

[0049] <Component (B')> (B')-1: Isobutyl glycol (ethylene glycol isobutyl ether) (B')-2: Diethylene glycol monomethyl ether (B')-3: Benzyl glycol (ethylene glycol monobenzyl ether) (B')-4: Tripropylene glycol dimethyl ether (B')-5: Diethylene glycol butyl methyl ether (B')-6: Methyl triglycol (triethylene glycol monomethyl ether) (B')-7: Propylene glycol monobutyl ether (B')-8: Propylene glycol

[0050] [Evaluation 1: Water displacement] A GA material (galvanized steel sheet, JAC270D, 60 mm x 80 mm, thickness 1 mm) was immersed in ion-exchanged water in a cylinder, and after gently pulling it out, it was confirmed that a water layer had formed on the surface of the GA material. Immediately after that, the GA material on which the water layer had formed was completely immersed in a 100 mL cylinder containing 80 mL of the cleaning oil composition of the Example or Comparative Example. After immersion, the time until the water layer of the GA material was completely removed was measured, and the material was evaluated according to the following criteria, with evaluations of S, A, and B being deemed to be acceptable. (Evaluation Criteria) ·S: 5 seconds or less ·A: More than 5 seconds but less than 15 seconds ·B: More than 15 seconds but less than 30 seconds ·C: More than 30 seconds It can be said that the shorter the number of seconds, the better the water displacement property of the cleaning oil composition, and the better the cleaning property for water-based processing oil.

[0051] The results of Evaluation 1 are shown in Tables 1 and 2. [Table 1]

[0052] [Table 2]

[0053] From Table 1, it is apparent that the cleaning oil compositions of Examples 1 to 24 are excellent in water displacement ability. In contrast, it is clear from Table 2 that the cleaning oil compositions of Comparative Examples 1 to 10 have poor water displacement properties. In addition, since the cleaning oil compositions of Examples 1 to 24 and Comparative Examples 1 to 10 all contained component (A), they had good detergency against oil-based processing fluids.

[0054] [Evaluation 2: Distillation regenerability] Both the distillation temperature range of component (A) (from the initial boiling point to the 90 vol% distillation temperature) and the distillation temperature range of component (B) (boiling point range) were compared, the maximum and minimum values of the distillation temperature were determined, and the difference between the maximum and minimum values was calculated. For example, when the distillation temperature range of component (A) is X1 to Y1 and the distillation temperature range of component (B) is X2 to Y2, if there is a relationship of X1 < X2 < Y1 < Y2, the minimum value is X1 and the maximum value is Y2. Then, the difference between the calculated maximum and minimum values was determined. It can be said that the smaller the difference between the calculated maximum and minimum values, the better the cleaning oil composition in terms of distillation regenerability.

[0055] The distillation temperatures of component (A), component (B), and component (B’) are shown in Table 3, and the results of Evaluation 2 are shown in Table 4.

Table 3

Table 4

[0056] From Table 4, it can be seen that the cleaning oil compositions of Examples 1 to 24 are all excellent in distillation regenerability.

Claims

1. A detergent oil composition comprising the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Component (B): A glycol ether compound having an organic character of 150 or more and an inorganic character of 100 to 150 in the organic conceptual diagram. The content of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The content of the component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition, The cleaning oil composition, wherein the total content of the component (A) and the component (B) is more than 90 mass% to 100 mass% based on the total amount of the cleaning oil composition.

2. 2. The cleaning oil composition according to claim 1, wherein the total content of the component (A) and the component (B) is 95% by mass to 100% by mass based on the total amount of the cleaning oil composition.

3. 3. The cleaning oil composition according to claim 1, wherein the organicity of the component (B) is 150 or more and 220 or less.

4. 3. The cleaning oil composition according to claim 1, wherein the component (B) is a compound represented by the following general formula (1): 【Chemical 1】 [In the general formula (1), R １１ represents an alkyl group having 4 or more carbon atoms. １２ represents an alkylene group having 2 or 3 carbon atoms. m1 is an integer of 1 to 5.

5. In the general formula (1), R １１ The cleaning oil composition according to claim 4, wherein represents an alkyl group having 4 to 6 carbon atoms.

6. 5. The cleaning oil composition according to claim 4, wherein in the general formula (1), m1 is an integer of 2 to 3.

7. 3. The cleaning oil composition according to claim 1, which is used for cleaning an object having a processing liquid attached to its surface.

8. 3. A method for using the cleaning oil composition according to claim 1 or 2 for cleaning an object having a processing liquid adhering to its surface.

9. A method for producing a detergent oil composition, comprising a step of mixing the following component (A) and the following component (B): Component (A): one or more base oils selected from the group consisting of mineral oils and hydrocarbon-based synthetic oils Component (B): A glycol ether compound having an organic character of 150 or more and an inorganic character of 100 to 150 in the organic conceptual diagram. the blending amount of the component (A) is 10% by mass to 99% by mass based on the total amount of the cleaning oil composition, The blending amount of the component (B) is 1% by mass to 90% by mass based on the total amount of the cleaning oil composition, The method for producing a cleaning oil composition, wherein the total amount of the component (A) and the component (B) is more than 90 mass% to 100 mass% based on the total amount of the cleaning oil composition.

Images