JP6965483B1 - Dissolving agent for removing oil, fingerprints or hand stains that have been transferred and adhered to the surface of the members that make up the appearance of the product, and the removal method using it. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and firmly transfer to a fine concave portion existing on a member surface such as a metal material, a plastic material, a glass material, a painted metal or a resin material constituting the appearance of a product which is a final form. Quickly dissolves oil, fingerprints or hand stains that have adhered to the material, and even if there is no rinsing process with a large amount of water or a rinse process with water, the components contained in oil, fingerprints, hand stains and cleaning agents do not remain on the surface of the member. A solubilizer for rapid removal and a removal method using the same are provided. SOLUTION: This is a dissolving agent for removing oil, fingerprints or hand stains transferred and adhered to the surface of a member constituting the appearance of a product, and is (A) general formula (1) [(CnH2n + 1) 4N +] OH-. (1) Consists of a fingerprint remover containing a quaternary ammonium hydroxide represented by (in the formula, n is an integer of 3 to 18) and (B) a solvent containing water and / or alcohol. An oil that is transferred and adhered to the surface of a member that constitutes the appearance of a product, which is a dissolving agent and has a concentration of the fingerprint removing agent in the dissolving agent of 0.05% by weight or more and 5.0% by weight or less. Dissolving agent that removes fingerprints or hand stains.

Description

The present invention relates to a dissolving agent for removing oil, fingerprints or hand stains transferred and adhered to the surface of a member constituting the appearance of a product, and a removing method using the same.

In recent years, many of the devices and equipment we use use parts made of various materials such as metal materials, plastic materials, glass materials, painted metal and resin materials, and many of these are made of products. It is applied to the surface of members that make up the appearance.
For example, in the case of a metal material, in order to enhance the appearance quality such as brilliance, texture, and feel of the metal surface, a smooth metal with a mirror finish or a metal whose surface is roughened by etching or polishing. Furthermore, metals with excellent high-grade feeling, which are colored by sputtering or the like, are widely used.
Specifically, it is applied to, for example, building materials, kitchen equipment, audio equipment, in-vehicle metal materials, elevator doors / operation panels, medical equipment, industrial equipment, and the like.
In the case of plastic materials, for example, covers, boxes, containers, shielding plates, electrical appliances, building materials, kitchen equipment, TV / IT from the viewpoints of light weight, low cost, strength, easy moldability, transparency, etc. It is applied to products in a wide range of fields such as equipment, audio equipment, car parts, and industrial equipment.

However, the surface of the members that make up the appearance of these products is prone to oil, fingerprints, hand stains, etc., due to various movements and operations of people, and the fingerprints, fingerprints, and hand stains become white or black after a long period of time. In some cases, there was a problem in terms of appearance quality because it was conspicuous. For example, in the product manufacturing / shipping process, machine oil used during work that involves operations such as product assembly, shipping, transportation, delivery, installation, inspection / inspection, etc. Oils such as working oil, rust preventive oil, and cooking oil are transferred to the surface of the member via gloves, and when working with bare hands, care is taken not to impair the appearance quality so that fingerprints or hand stains do not adhere. It had to be handled with caution. In addition, when a general customer uses, holds, or operates the product, it is necessary to take the same precautions to prevent the oil on the hands from being transferred and to prevent fingerprints or hand stains from adhering to the product.

When these stains such as oil, fingerprints or hand stains are transferred and adhered to the surface of the member constituting the appearance of the above-mentioned product, the metal surface, plastic surface, glass surface, painted metal or resin material surface, etc. Since components contained in oil, fingerprints, hand stains, etc. enter the recesses of the surface and stick to them, making it difficult to remove them. The cleaning agent referred to here corresponds to the solubilizer of the present invention), a chlorine-based solvent, an alcohol solvent, a hydrocarbon solvent such as a thinner, and the like, and a wiping operation is required. Therefore, a large amount of surfactant component of the cleaning agent remains on the surface of the member, or damage caused by the solvent used causes, for example, the underlying member to crack, whiten, or have an adverse effect such as discoloration, or the solvent. There was a problem that the physical, human and environmental burdens increased due to odor and toxicity.

Therefore, as a cleaning agent for cleaning oil on the surface of metal parts and stains on fingerprints, for example, as a cleaning agent on the surface of lenses and wafers, quaternary ammonium hydroxide salts and nonionic surfactants have been used. An organic alkaline aqueous composition containing an alkanolamine has been proposed (Patent Document 1).
Similarly, as a cleaning agent for metal foil, a composition containing a basic compound such as quaternary ammonium hydroxide and an organic solvent having a solubility parameter δ of 8 or more and 16 or less such as water and dipropylene glycol monomethyl ether is proposed. (Patent Document 2).
Further, as a cleaning agent for electronic parts, a composition containing tetrabutylammonium hydride and an alkylene oxide adduct has been proposed (Patent Document 3).
Further, as a cleaning agent for metal parts, a composition containing tetra n-butylammonium hydroxide, glycerin and the like has been proposed (Patent Document 4).
Further, as a method for removing oil or the like adhering to metal parts or the like, a method of applying a cleaning agent to a dirty portion and wiping it off has been proposed (Patent Documents 5, 6, 7, 8, 9, 10).

Japanese Patent No. 2579401 Japanese Patent No. 4301828 Japanese Unexamined Patent Publication No. 6-313189 Japanese Unexamined Patent Publication No. 2005-336470 Japanese Unexamined Patent Publication No. 6-146040 Japanese Unexamined Patent Publication No. 7-003292 Japanese Unexamined Patent Publication No. 9-059677 Japanese Unexamined Patent Publication No. 9-040998 Japanese Unexamined Patent Publication No. 6-22489 Japanese Unexamined Patent Publication No. 2006-193653

Here, the member surface that constitutes the appearance of the product is a metal material, a plastic material, a glass material, or a coating that constitutes the surface of the final form of the commercialized product, such as the building material, kitchen equipment, and audio equipment described above. It is the surface of a member such as a metal or resin material.
Further, the target of the solubilizer of the present invention and the removal method using the same is, specifically, an object of oil, fingerprints or hand stains transferred and adhered to the surface of a member constituting the appearance of the product, or , When classifying those objects by component, the sebum component other than the oil component and the acidic substance, the sebum component of the acidic substance, and the inorganic component are the target components.
As a specific object, the oil is the pattern of gloves such as machine oil, work oil, rust preventive oil, edible oil, etc. that are in use and / or used due to work, operation, operation, etc. It is transferred to the surface of the member in the pattern of a fingerprint.
Further, the fingerprint or the hand stain is specifically the sweat secreted from the palm or the like transferred to the surface of the member in the pattern of a fingerprint during work, movement, operation, or the like.
In general, 98% of the components contained in sweat are water, but the remaining 2% contains sebum components of acidic substances such as lactic acid, amino acids, uric acid, and fatty acids, and sebum components other than acidic substances. It is known that it contains inorganic components such as sodium chloride, potassium component, and calcium component.
From this, the components of oil, fingerprints, and hand stains are oil components such as machine oil, work oil, rust preventive oil, and edible oil, sebum components of acidic substances contained in sweat, sebum components other than acidic substances, and inorganic substances. It is an ingredient consisting of ingredients.

Oil, fingerprints, or hand stains that have been transferred and adhered to the surface of this member easily penetrate into minute recesses existing on the surface of the member such as metal materials, plastic materials, glass materials, and painted metal and resin materials, and are strong. There is a problem that the appearance quality of the product is deteriorated because it adheres to the material.
Furthermore, when trying to remove the surface of a member to which oil, fingerprints, or hand stains have been transferred and adhered with a cleaning agent, it is difficult to rinse the entire product, which is the final form, with a large amount of water or to add a rinse process with water. Therefore, oil, fingerprints, or hand stains may remain on the surface of the member, or components contained in the cleaning agent may remain.
Therefore, the oil, fingerprints, or hand stains that have been transferred to the surface of the member that constitutes the appearance of the product, which is the final form, are quickly dissolved, and the oil and fingerprints are not required to be rinsed with a large amount of water or rinsed with water. Alternatively, it is required that hand stains, cleaning agents, etc. do not remain on the surface of the member.

However, the cleaning agents containing quaternary ammonium hydroxide in Patent Documents 1 and 2 have a short carbon chain length of 1 carbon or 2 carbons in the alkyl group bonded to the ammonium cation of the quaternary ammonium hydroxide. In addition, there is a problem that the ability to solubilize the oil is poor and the solubility of the sebum component and the inorganic component is small.
Furthermore, these cleaning methods include chemical and physical methods such as, for example, putting metal parts into a cleaning tank, dipping cleaning (which may be accompanied by heating), spray cleaning, ultrasonic cleaning, and vapor cleaning. Since it is premised on the addition, it may not be applicable in the case of the member surface constituting the appearance of the product, which is the final form described above, which cannot be put into the washing tank.

Further, the cleaning agent containing tetrabutylammonium hydride of Patent Documents 3 and 4 has a large amount of tetrabutylammonium hydride and other components, and requires a rinse or the like. For this reason, it may not be applicable in the case of the member surface constituting the appearance of the product, which is the final form in which the rinsing process cannot be inserted. Further, in the absence of rinsing with water, a large amount of components contained in the cleaning agent may remain on the surface of the member, which may significantly reduce the appearance quality.

Further, in the method of applying the cleaning agent to the dirty portion of Patent Documents 5 to 10 and wiping it off, since the amount of the component contained in the cleaning agent is large, a large amount of the cleaning agent component remains on the surface of the member after the cleaning agent is wiped off. As a result, the appearance quality may be significantly deteriorated.

Therefore, as a result of diligent studies on the above-mentioned problems, the present inventors have made, with respect to the prior art, metal materials, plastic materials, glass materials, painted metal and resin materials, etc. that constitute the appearance of the final product. It easily penetrates into the minute recesses on the surface of the member, quickly dissolves firmly adhered oil, fingerprints or hand stains, and does not require a large amount of water rinsing process or water rinsing process. Alternatively, we have found a dissolving agent for quickly removing hand stains and components contained in the cleaning agent without remaining on the surface of the member, and a removing method using the dissolving agent.
That is, an object of the present invention is to provide a dissolving agent for removing oil, fingerprints or hand stains transferred and adhered to the surface of a member constituting the appearance of a product, and a removing method using the same.

In order to solve the above problems, according to the viewpoint of the present invention, it is a dissolving agent for removing oil, fingerprints or hand stains that have been transferred and adhered to the surface of a member constituting the appearance of the product.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
It is a solubilizer composed of Dissolving agents are provided to remove adhering oils, fingerprints or hand stains.

The above-mentioned dissolving agent is transferred to the surface of the member constituting the appearance of the product to dissolve the oil, fingerprints or hand stains, and the dissolving agent in which the oil, fingerprints or hand stains are dissolved by utilizing the capillary phenomenon of the fibers is used as the fiber. A dissolving agent that is impregnated and wiped off, and is a dissolving agent that removes oil, fingerprints, or hand stains that are transferred to and adhered to the surface of a member that constitutes the appearance of a product characterized by having a viscosity that impregnates the fibers. It is preferable to have.

Further, the fingerprint remover is a dissolving agent that removes oil, fingerprints or hand stains that are transferred and adhered to the surface of a member constituting the appearance of the product, which is characterized by containing a nonionic surfactant. Is preferable.

Further, it is preferable that the fingerprint removing agent is a dissolving agent that removes oil, fingerprints or hand stains that are transferred and adhered to the surface of a member constituting the appearance of the product, which is characterized by containing an alkaline compound.

Further, the solvent containing water and / or alcohol is a solvent composed of water and alcohol. It is preferably an agent.

In addition, on the surface of the member that constitutes the appearance of the product to which oil, fingerprints, or hand stains have been transferred and adhered.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
The first step of applying the solubilizer, which comprises the above, and the concentration of the fingerprint remover in the solubilizer is 0.05% by weight or more and 5.0% by weight or less.
The second step of impregnating the fibers with a dissolving agent that dissolves oil, hand stains, or fingerprints by utilizing the capillary phenomenon of the fibers. It is preferably a method for removing fingerprints.

In addition, on the surface of the member that constitutes the appearance of the product to which oil, fingerprints, or hand stains have been transferred and adhered.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
The first step of applying the solubilizer, which comprises the above, and the concentration of the fingerprint remover in the solubilizer is 0.05% by weight or more and 5.0% by weight or less, to the fiber.
The second step, in which the dissolving agent applied to the fibers is transferred to the surface of the member to dissolve the oil, hand stains, or fingerprints that have adhered to the surface of the member,
Utilizing the capillary phenomenon of fibers, it is transferred and adhered to the surface of a member constituting the appearance of the product, which comprises a third step of impregnating the fibers with a dissolving agent in which oil, hand stains or fingerprints are dissolved. It is preferable to use a method for removing oil, fingerprints or hand stains.

As described above, according to the present invention, the final form of the product is immersed in minute recesses existing on the surface of members such as metal materials, plastic materials, glass materials, and painted metal and resin materials. Included in oil, fingerprints, hand stains, and cleaning agents without the need for a process of rinsing with a large amount of water or a process of rinsing with water, which quickly dissolves oil, fingerprints, or hand stains that are easily absorbed and firmly transferred and adhered. It is possible to provide a solubilizer for rapidly removing the components to be removed without remaining on the surface of the member, and a removal method using the solubilizer.

It is an overall photograph which shows the surface after the fingerprint is attached to the SUS304 test piece roughened by the hairline processing of this invention, and the appearance observation result after applying the dissolving agent on the fingerprint and wiping it off. It is sectional drawing which shows the definition about the contact angle measuring method of the water droplet on the SUS304 test piece which was roughened by the hairline processing. It is a flowchart of the method of determining the presence or absence of a component such as a fingerprint and a fingerprint remover component adhering to the surface of a member. It is sectional drawing which shows the block diagram of the metal surface after the fingerprint is attached to the SUS304 test piece roughened by the hairline processing, and the determination method by the contact angle measurement of the water of the component such as the fingerprint which adhered to the metal surface. It is sectional drawing which shows the clean surface as a reference, the contact angle measurement method of water of Example 1, and Comparative Example 1 and Comparative Example 2. After attaching the fingerprint to the SUS304 test piece roughened by the hairline processing and the concentration of the fingerprint removing agent contained in the solubilizers of Examples 1 to 9 of the present invention and Comparative Examples 1 and 2, the fingerprint is formed. It is a graph showing the relationship with the contact angle of water after applying and wiping off the dissolving agents of Examples 1 to 9 and Comparative Examples 1 and 2 above.

FIGS. 1 to 6 show a dissolving agent for removing oil, fingerprints, or hand stains transferred to and adhering to the surface of a member constituting the appearance of the product of the present invention, and a removing method using the same.
FIG. 1 is an overall photograph showing the results of appearance observation before and after applying the dissolving agent and wiping it off. Reference numeral 1 denotes a SUS304 test piece roughened by hairline processing, and FIGS. 1A and 1B are appearance observation results of Example 1. 2 shows the appearance after fingerprints are attached to the SUS304 test piece roughened by the hairline processing of 1, and 2a shows the appearance after applying the solubilizer of Example 1 on the fingerprints and further wiping with a microfiber cloth. The appearance. 1 (c) and 1 (d) are appearance observation results of Comparative Example 1. 3 shows the appearance after fingerprints are attached to the SUS304 test piece roughened by hairline processing, and 3a shows the appearance after applying the dissolving agent of Comparative Example 1 on the fingerprints and further wiping with a microfiber cloth. be. 1 (e) and 1 (f) are appearance observation results of Comparative Example 2. 4 shows the appearance after fingerprints are attached to the SUS304 test piece roughened by hairline processing, and 4a shows the appearance after applying the dissolving agent of Comparative Example 2 on the fingerprints and further wiping with a microfiber cloth. be.
FIG. 2 is a cross-sectional view showing a definition regarding a method for measuring a contact angle of water droplets on a member surface. FIG. 2A shows a cross-sectional state of the SUS304 test piece after being roughened by hairline processing. Reference numeral 5 denotes a SUS304 test piece, and 5a indicates a concavo-convex portion in which the surface of the SUS304 test piece is roughened by hairline processing and the average roughness (Ra) of the surface is 0.2 μm or more and less than 1.0 mm. FIG. 2B shows a cross-sectional view when water droplets are dropped on the uneven surface of the SUS305 test piece roughened by hairline processing. Reference numeral 6 denotes a single drop of water having a volume of 0.8 μL to 1.2 μL, and the water drop wets the uneven portion of the surface and is in contact with the test piece. Reference numeral 7 denotes a reference line in which the surface of the metal base material in which the uneven surface averages the depths to the apex and bottom of the convex and concave portions, and the averaged surface is regarded as a smooth surface, and water droplets come into contact with each other. 8 indicates a tangent line to the water droplet based on the reference line of 7, and 9 indicates an internal angle between the reference line and the tangent line, that is, the contact angle of the water droplet.
FIG. 3 shows a flowchart of a method for determining the presence or absence of a component such as a fingerprint attached to the surface of a member. FIG. 3A shows a first step for setting a reference angle required for determining the presence / absence of a component such as a fingerprint attached to the surface of a member. First, a member having the same material and the same surface shape as the member to be judged is cleaned. After that, the contact angle of water droplets on a clean surface is measured, and a reference angle is set in consideration of the variation in the contact angle. FIG. 3B shows a second step of obtaining the contact angle value of the water droplet on the surface of the member to be determined. For example, it is a step of preparing a member to be judged wiped with a dissolving agent, and then measuring the contact angle of water droplets on the surface to be judged. FIG. 3C shows a third step of comparing and determining the reference angle set in the first step and the contact angle value of the water droplet measured in the second step. When the contact angle value of the water droplet on the surface to be determined is smaller than the reference angle of the water droplet on the clean surface, it is determined that there is a component such as a fingerprint or a fingerprint remover component, and the reference angle of the water droplet on the clean surface is used. When the contact angle values of the water droplets on the surface to be determined are almost the same, it is determined that there is no component such as a fingerprint or a fingerprint removing agent component.
FIG. 4 is a specific cross-sectional view showing a method for determining the presence or absence of a component such as a fingerprint attached to the surface of a member, and is a cross-sectional view of the metal surface after the fingerprint is attached to the SUS304 test piece roughened by hairline processing. It is a block diagram and the cross-sectional view which shows the determination method by the contact angle measurement of the water droplet of a component such as a fingerprint adhering to a metal surface. FIG. 4A shows the structure of the metal surface. Reference numeral 5 denotes a SUS304 test piece roughened by hairline processing. As shown in FIG. 2A described above, the surface is accompanied by an uneven structure, but the notation in the drawings will be omitted thereafter. Reference numeral 10 indicates a fingerprint layer attached to the metal surface. Reference numeral 5b is a cross-sectional direction line obtained by cutting a metal base material having a fingerprint layer. FIG. 4B shows a cross-sectional view when water droplets on a clean metal surface without a fingerprint layer are dropped. 6a is a water droplet of 0.8 μL to 1.2 μL, 8a indicates a tangent line to the water droplet, and 9a indicates a contact angle of the water droplet. The contact angle of this clean metal surface is a criterion for determining whether fingerprints are attached or fingerprints are removed, or whether water-soluble components such as surfactants contained in the fingerprint remover are attached. Is what becomes. FIG. 4C shows a cross-sectional view when 0.8 μL to 1.2 μL of water droplets of 6b are dropped onto the fingerprint layer of 10. 8b indicates the tangent line with the water droplet, and 9b indicates the contact angle of the water droplet. FIG. 4D shows a case where a dissolving agent was applied onto 10 fingerprints, wiped off with a microfiber cloth, and then 0.8 μL to 1.2 μL of water droplets of 6c were dropped on the surface position where the fingerprints were present. It is a cross-sectional view. 10a indicates the position of the metal surface on which the fingerprint was present, 8c indicates the tangent line with the water droplet, and 9c indicates the contact angle of the water droplet.
FIG. 5 is a cross-sectional view showing a reference clean surface and a method for measuring the contact angle of water droplets of Example 1, and Comparative Examples 1 and 2. FIG. 5A shows a cross-sectional view when water droplets are dropped on a clean metal surface that has been washed with a chlorine-based solvent and dried. Reference numeral 11 is a SUS304 test piece roughened by hairline processing, 12 is a water droplet of 0.8 μL to 1.2 μL, 13 is a tangent line to the water droplet, and 14 is a contact angle of the water droplet. FIG. 5B shows a cross-sectional view when the water droplet of Example 1 is dropped. 12a is a water droplet of 0.8 μL to 1.2 μL, 13a indicates a tangent line to the water droplet, and 14a indicates a contact angle of the water droplet. FIG. 5C shows a cross-sectional view of Comparative Example 1 when the water droplet was dropped. Reference numeral 15 indicates a fingerprint layer remaining on the metal surface, 12b indicates a water droplet of 0.8 μL to 1.2 μL, 13b indicates a tangent line to the water droplet, and 14b indicates a contact angle of the water droplet. FIG. 5D shows a cross-sectional view of Comparative Example 2 when the water droplet was dropped. Reference numeral 16 indicates a fingerprint remover layer remaining on the metal surface, 12c indicates a water droplet of 0.8 μL to 1.2 μL, 13c indicates a tangent line to the water droplet, and 14c indicates a contact angle of the water droplet.
FIG. 6 is a graph showing the relationship between the concentration of the fingerprint remover contained in the dissolving agent and the contact angle of water after wiping. Specifically, after fingerprints are attached to the SUS304 test piece roughened by hairline processing, the dissolving agents of Examples 1 to 9 of the present invention and Comparative Examples 1 and 2 are applied and wiped off. It is a graph which shows the relationship with the contact angle of water. The concentration of the fingerprint remover contained in the solubilizers of Examples 1 to 9 is in the range of 0.05% by weight to 5.0% by weight, which is the surface to be determined as the reference angle of water droplets on a clean surface. The contact angle value of the water droplets is almost the same, and it is a region where it is determined that there is no component such as a fingerprint or a fingerprint removing agent component. In fact, the plot points of 0.05% by weight and 5.0% by weight of the fingerprint remover concentration were in Examples 3 and 9, and the plot points of 0.1% by weight and 2.0% by weight were carried out. Examples 3 to 7 and Example 8, and the plot points of 0.5% by weight and 1.5% by weight are Examples 1 and 2.
Further, the concentrations of the fingerprint remover of Comparative Example 1 and Comparative Example 2 showed plot points of 0.04% by weight and 6.0% by weight, and the reference angle of the water droplet on the clean surface was determined as the reference angle of the water droplet on the surface. The contact angle values are almost the same, and it is outside the region where it is determined that there is no component such as a fingerprint or a fingerprint removing agent component.

Further, hereinafter, it is a dissolving agent for removing oil, fingerprints or hand stains transferred and adhered to the surface of a member constituting the appearance of the product of the present invention.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
It is a solubilizer composed of A solubilizer that removes adhering oil, fingerprints or hand stains will be described in detail.

The member surfaces constituting the appearance of the product according to the present invention include, for example, building materials, kitchen equipment, TV / IT equipment, audio equipment, in-vehicle metal materials, car parts, elevator doors / operation panels, medical equipment, and industry. It is a member surface used for products such as equipment / equipment, covers, boxes, containers, shielding plates, electrical appliances, window glass, mirrors, furniture, office equipment / equipment, housing equipment / equipment, kitchen equipment, and refrigerators.
Examples of the material of the member surface include metal materials, plastic materials, glass materials, pottery, painted metal and resin materials, and the like.

Examples of the material of the metal material include steel, stainless steel, copper and copper alloys, aluminum and aluminum alloys, and among them, stainless steel and aluminum are used in many fields because they have excellent corrosion resistance and workability. ing.

The surface of the metal is roughened by processing methods such as hairline processing, buffing, and blasting, in addition to mirror processing to a flat surface or curved surface, and the average roughness (Ra) of the surface is 0.2 μm or more and less than 1 mm. It may be a metal surface having a structure.

Further, the above-mentioned metal surface formed a metal thin film such as titanium or chromium or an oxide film such as titanium or chromium by a method such as sputtering, vapor deposition, CVD (Chemical Vapor Deposition), PVD (Physical Vapor Deposition) or the like. It may be a colored metal surface.

Examples of plastic material materials include acrylic resin, polycarbonate, vinyl chloride, polyethylene, polypropylene, polystyrene, ABS resin (acrylonitrile-butadiene-styrene resin), PEEK (polyetheretherketone), and PBT (polyethylene terephthalate). , PET (polyethylene terephthalate) and the like, and in particular, acrylic resin, polycarbonate and PET are used in many fields because they are excellent in terms of transparency, light weight, processability, and price.

In addition, as the glass material, soda-lime glass, lead glass, boric acid glass, crystallized glass, quartz glass can be used, and iron-based metals and acrylics painted with epoxy paint, acrylic paint, urethane paint, etc. Resin material can be used.

The fingerprint removing agent contained in the dissolving agent for removing oil, fingerprints or hand stains transferred to and adhering to the surface of a member constituting the appearance of the product according to the present invention is (A) general formula (1).
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
It contains a quaternary ammonium hydroxide represented by (1) as an essential component.

Specifically, the target of the dissolving agent of the present invention and the removal method using the same is oil, fingerprints, or hand stains that have been transferred and adhered to the surface of a member constituting the appearance of the product, or they. When classifying the objects of the above by component, the sebum component other than the oil component and the acidic substance, the sebum component of the acidic substance, and the inorganic component are the target components.
As a specific object, the oil is the pattern of gloves such as machine oil, work oil, rust preventive oil, edible oil, etc. that are in use and / or used due to work, operation, operation, etc. It is transferred to the surface of the member in the pattern of a fingerprint.
Further, the fingerprint or the hand stain is specifically the sweat secreted from the palm or the like transferred to the surface of the member in the pattern of a fingerprint during work, movement, operation, or the like.
In general, 98% of the components contained in sweat are water, but the remaining 2% contains sebum components of acidic substances such as lactic acid, amino acids, uric acid, and fatty acids, and sebum components other than acidic substances. It is known that it contains inorganic components such as sodium chloride, potassium component, and calcium component.
From this, the components of oil, fingerprints, and hand stains are oil components such as machine oil, work oil, rust preventive oil, and edible oil, sebum components of acidic substances contained in sweat, sebum components other than acidic substances, and inorganic substances. It is an ingredient consisting of ingredients.

The quaternary ammonium hydroxide contained as an essential component rapidly dissolves oil components, sebum components other than acidic substances, sebum components of acidic substances, and inorganic components when oil, fingerprints, or hand stains are classified by component. It is effective for doing so.
Hereinafter, a specific description will be given.
Quaternary ammonium hydroxide is used for machine oil, work oil, rust preventive oil, cooking oil, and other oils that are in use and / or used during work, operation, and operation, and have a glove pattern or fingerprint pattern. It has the effect of quickly dissolving the oil component transferred to the surface of the member.
This is because when the carbon chain length of the alkyl group bonded to the ammonium cation is 3 or more carbon atoms, the lipophilicity to the oil component is increased, so that the attached oil component is more effectively incorporated into the molecule, that is, solubilized. It is effective because it can be done.
Further, it is effective because sebum components other than acidic substances contained in fingerprints or hand stains can be solubilized.
From this, it is possible to obtain the effect of rapidly dissolving the oil component transferred to the surface of the member and the sebum component other than the acidic substance contained in the fingerprint or hand stain.

Furthermore, quaternary ammonium hydroxide is a sebum component of acidic substances such as lactic acid, amino acids, uric acid, and fatty acids contained in fingerprints or hand stains transferred to the surface of members in the pattern of fingerprints, and sodium chloride, potassium components, calcium components, etc. It has the effect of rapidly dissolving the inorganic components of.
The sebum component of the acidic substance contained in the fingerprint or hand stain is rapidly saponified with the acidic substance because the hydroxide ion, which is the counter ion of the quaternary ammonium hydroxide, is strongly alkaline. The saponification reaction product produced by this reaction can have a high dissolution ability as a result of the increased solubility in the water or alcohol solvent contained in the solubilizer.
In addition, in the inorganic component contained in the fingerprint or hand stain, the hydroxide ion interacts with the positive ion derived from the inorganic component such as the sodium component, the potassium component, or the calcium component, that is, the sodium cation, the potassium cation, or the calcium cation. Therefore, it can have a high dissolving ability for inorganic components.
From this, it is possible to obtain the effect of rapidly dissolving the sebum component and the inorganic component of the acidic substance contained in the fingerprint or hand stain attached to the surface of the member.

As the quaternary ammonium hydroxide described above, the carbon chain length of the alkyl group bonded to the ammonium cation of the quaternary ammonium hydroxide is preferably 3 or more and 18 or less. For example, specifically, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, tetrapentylammonium hydroxide, tetrahexylammonium hydroxide, tetraoctylammonium hydroxide, tetradecylammonium hydroxide, tetraoctadecylammonium hydroxide and the like can be used. These can be mentioned, and one type or a combination of two or more types can be used.
When the number of carbon atoms is 2 or less, the effect of solubilizing oil components contained in oil, fingerprints, or hand stains that have been transferred to the surface of the member or sebum components other than acidic substances is small, so that the solubility of oil, fingerprints, or hand stains is increased. Inferior, compounds having more than 18 carbon atoms may be difficult to synthesize and impractical.

In particular, tetrabutylammonium hydroxide, which has a carbon chain length of 4 as an alkyl group bonded to an ammonium cation, is an oil component transferred to the surface of a member and adhered to it, or a sebum other than an oil component or an acidic substance contained in fingerprints or hand stains. It has an excellent ability to solubilize the components, has a high saponification reactivity with the sebaceous component of the acidic substance, and has a strong interaction with the inorganic component, so that it is suitable for rapid dissolution.

In addition, the fingerprint remover of the present invention may be added with a nonionic surfactant, for example, glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene ether, fatty acid methyl ester ethoxylate, polyoxyethylene alkyl ether. Types and the like can be mentioned, and one type or a combination of two or more types can be used.

When a nonionic surfactant is mixed with other components to obtain a fingerprint remover, the mixing ratio thereof is not particularly limited. For example, quaternary ammonium hydroxide and nonionic surfactant are used. When the agents are mixed, it is suitable because the oil component, the sebum component other than the acidic substance, the sebum component of the acidic substance, and the inorganic component are dissolved more quickly when the weight ratio is 1: 1.

Further, the fingerprint remover of the present invention may contain a water-soluble alkaline compound other than the quaternary ammonium hydroxide as an alkaline component, and specifically, for example, sodium hydroxide, potassium hydroxide, and water. Alkaline earth metal hydroxides such as cesium oxide, sodium carbonate and potassium carbonate, amphoteric amine compounds such as alkylamine oxides, nitrogen-containing compounds such as ammonia, trimethylamine, triethylamine, pyridine and N-methyl-2-pyrrolidone. It is possible to use one type or a combination of two or more types.

When the alkaline component is mixed with other components to obtain a fingerprint remover, the mixing ratio thereof is not particularly limited, but for example, quaternary ammonium hydroxide, a nonionic surfactant and an alkaline component are used. When mixing, the alkaline component should be mixed at a ratio in the range of 1/2 to 2 times the weight of the total weight of the quaternary ammonium hydroxide and the nonionic surfactant. Is preferable. By mixing alkaline components in such a weight ratio, sebum components other than oil components and acidic substances, sebum components of acidic substances, and inorganic components are dissolved more quickly and more strongly, so that sticky oil or blackening occurs. It is suitable because it can dissolve discolored stubborn fingerprints or hand stains.

The concentration of the fingerprint remover contained in the solubilizer is the case where the above-mentioned quaternary ammonium hydroxide compound is used alone, or when other components such as a nonionic surfactant and / or an alkaline compound are added. It is the concentration calculated from the total amount when
For example, as a fingerprint remover, a solubilizer containing 0.5 g of a quaternary ammonium hydroxide compound, 0.5 g of a nonionic surfactant, 0.5 g of an alkaline compound, and 88.5 g of water as a solvent. The concentration of the fingerprint remover contained in is calculated to be 1.5% by weight.

The concentration of the fingerprint remover is, for example, preferably 0.05% by weight or more and 5.0% by weight or less, more preferably 0.1% by weight or more and 5.0% by weight or less, still more preferably 0.1% by weight or more 2 It is 0.0% by weight or less, most preferably 0.5% by weight or more and 1.5% by weight or less.

Since the fingerprint remover contained in the solubilizer is composed of a surfactant having a concentration of 0.05% by weight or more, which is equal to or higher than the critical micelle concentration, the surface tension of the solubilizer is sufficiently small and the dirty member surface gets wet. Can spread. At the same time, sebum components other than oil components and acidic substances are solubilized in micelles, and oil, fingerprints or hand stains are quickly dissolved by the effect of the interaction between the fingerprint remover and the sebum components and inorganic components of acidic substances. Can be done.
Further, it is generally known that an increase in the amount of a surfactant in an aqueous solution is accompanied by an increase in the viscosity (or viscosity) of the solution due to the interaction between water and the surfactant due to hydrogen bonding or the like. However, the dissolving agent is characterized in that the viscosity of the dissolving agent is small because the fingerprint removing agent in the dissolving agent is 5.0% by weight or less.
The balance between the dissolving properties for dissolving these oils, fingerprints or hand stains and the viscosity of the dissolving agent is the reason why the above-mentioned suitable concentration range exists.
Therefore, when the concentration of the fingerprint remover is less than 0.05% by weight, sufficient micelles are not formed because the concentration is less than the critical micelle concentration, and sebum components other than oil components and acidic substances cannot be solubilized. Or fingerprints or hand stains may not be dissolved.
Further, when the concentration exceeds 5.0% by weight, the viscosity of the solubilizer increases, so that when the solubilizer is impregnated into the fibers, it is difficult to impregnate the fine gaps of the fibers used. That is, since the capillary phenomenon of the fiber cannot be fully utilized, the oil component dissolved in the dissolving agent, the sebum component other than the acidic substance, the sebaceous component and the inorganic component of the acidic substance, and the component of the fingerprint remover are members. It may reattach to the surface and cause uneven wiping, which may impair the appearance of the metal surface.

The fingerprint remover according to the present invention is preferably a solubilizer diluted with a solvent containing water and / or alcohol.
These solvents are substances in which the sebum component other than the oil component and the acidic substance is solubilized in the micelle, the saponification reaction product of the fingerprint remover and the sebum component of the acidic substance, and the mutual of the inorganic component. It can dissolve agents and the like.
In the case of a mixed solvent containing water and alcohol, in general, as the alcohol concentration with respect to water increases, the viscosity increases due to the interaction between water and alcohol such as hydrogen bonds, and a maximum value of viscosity may exist. Are known.
However, the amount of increase in viscosity due to the mixture of water and alcohol is negligible because the amount of change is extremely small compared to the effect of the increase in the amount of surfactant in the dissolving agent described above.
Therefore, the component dissolved in the solvent is easily sucked into the fine gaps of the fiber, that is, the dissolved component can be impregnated into the fiber and wiped off by fully utilizing the capillary phenomenon of the fiber. It has the effect that it does not easily remain on the surface and uneven wiping is unlikely to occur.
Further, it has an effect of improving the drying property after wiping, and specifically, water or an alcohol solvent alone, a mixed solvent of water and an alcohol solvent, or another water-soluble solvent can be added.

As the water, purified water, distilled water, ion-exchanged water, tap water, alkaline electrolytic ionized water and the like can be used.

As the alcohol solvent, primary alcohols such as methanol, ethanol, normal propyl alcohol and normal butyl alcohol, secondary alcohols such as isopropyl alcohol and isobutyl alcohol, and tertiary alcohols such as tert-butyl alcohol are suitable. One type or two or more types of these are used. Among these alcohol solvents, a modified ethanol solvent containing ethanol as a main component and composed of normal propyl alcohol and isopropyl alcohol is more preferable from the viewpoint of detergency and safety.

Further, polyhydric alcohol solvents such as ethylene glycol, propylene glycol and glycerin, ketone solvents such as acetone, methyl ethyl ketone, methyl-n-propyl ketone and methyl-n-butyl ketone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether and ethylene glycol. Ether solvents such as diethyl ether, ethylene glycol mono-n-hexyl ether, ethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol mono-n-butyl ether, methyl acetate, ethyl acetate, acetate-n-propyl, acetate-isopropyl, ethylene acetate Ester solvents such as glycol monomethyl ether, ethylene glycol monoethyl ether acetate, diethylene glycol monomethyl ether acetate, methyl lactate, ethyl lactate, and butyl lactate can be added and mixed.

When a mixed solvent such as water and an alcohol solvent and another solvent is used, the mixing ratio of water and the alcohol solvent and other solvents can be used at any ratio.

The method for removing oil, fingerprints, or hand stains according to the present invention applies to the surface of a member that constitutes the appearance of a product to which oil, fingerprints, or hand stains have been transferred and adhered.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
The first step of applying the solubilizer, which comprises the above, and the concentration of the fingerprint remover in the solubilizer is 0.05% by weight or more and 5.0% by weight or less.
The second step of impregnating the fibers with a dissolving agent that dissolves oil, hand stains, or fingerprints by utilizing the capillary phenomenon of the fibers. It is preferably a method for removing fingerprints.

Specifically, the first step of applying the dissolving agent to the surface of the member by a general method such as spray coating or brush coating is carried out to dissolve the oil, fingerprints or hand stains. Next, by utilizing the capillary phenomenon of fibers such as waste cloths, towels, microfiber cloths, and cloths, oil components dissolved in a solubilizer, sebum components other than acidic substances, sebaceous components of acidic substances, inorganic components, etc. are added to the fibers. A removal method can be adopted in which the second step of impregnation is performed and the solubilizer is wiped off.
The second step of impregnating the fiber with the solubilizer is to reattach the substance dissolved in the solubilizer or the surfactant component contained in the fingerprint remover due to the residual liquid because the solubilizer can be absorbed quickly. There is no unevenness and unevenness is unlikely to occur. It is also suitable because it dries quickly.

Here, further, the first step for dissolving the above-mentioned oil, fingerprint or hand stain, and the second step for impregnating the dissolving agent in the fiber will be described in detail.

In the first step, since the fingerprint remover in the solubilizer is composed of a surfactant of 0.05% by weight or more, which is equal to or higher than the critical micelle concentration, the surface tension of the solubilizer is sufficiently small and becomes dirty. It can wet and spread on the surface of the member. At the same time, sebum components other than oil components and acidic substances are solubilized in micelles, and oil, fingerprints or hand stains are quickly dissolved by the effect of the interaction between the fingerprint remover and the sebum components and inorganic components of acidic substances. Can be done.
In addition, it is generally known that an increase in the amount of surfactant in an aqueous solution is accompanied by an increase in the viscosity (or viscosity) of the solution due to the interaction between water and the surfactant due to hydrogen bonding or the like. The dissolving agent is characterized in that the viscosity of the dissolving agent is small because the fingerprint removing agent in the dissolving agent is 5.0% by weight or less.

The second step is to rapidly impregnate the lysing agent into the fiber by utilizing the capillary phenomenon of the fiber.
In order to effectively utilize the capillary phenomenon, it is generally said that the surface tension of the solution impregnating the fibers is low and the viscosity of the solution is low.
That is, since the solubilizer has a low surface tension and at the same time has a low viscosity, the solubilizer can be quickly impregnated into the fiber in the second step, and the reattachment of the components due to the liquid residue is small and unevenness occurs. It is suitable because it is difficult.
Further, even if some unevenness or the like occurs on the surface of the member after the second step, since the degree of unevenness is slight, it should be wiped off by wiping with air or rinsing a small amount of water. Can be done.

The fibers such as the waste cloth, towel, microfiber cloth, and cloth used for wiping off the dissolving agent in the second step are preferably dry fibers.
In the case of dry fibers, the dissolving agent can be quickly impregnated into the fine gaps in the fibers, and the reattachment of the components due to the liquid residue is small and unevenness is unlikely to occur, which is preferable.
Furthermore, when the fibers containing the impregnated dissolving agent are repeatedly wiped, the dissolving agent impregnated in the fine gaps in the fibers exudes to the surface side of the fibers due to the force of pressing the fibers when wiping. In other words, oil, fingerprints, or oil, fingerprints, or It is suitable because it has the effect of dissolving hand stains more quickly, and there is little reattachment of components due to liquid residue, and unevenness is unlikely to occur.
Therefore, when the fibers are previously filled with fine gaps by a solvent such as water, the dissolving agent is diluted by the solvent such as water contained in the fibers to reduce the concentration, resulting in oil, fingerprints or hand stains. May reduce the effect of rapidly dissolving. In addition, since the dissolving agent is less likely to be invaded by the fibers, reattachment of the components may occur due to the liquid residue.

Further, the method for removing oil, fingerprints or hand stains according to the present invention is applied to the surface of a member constituting the appearance of the product to which the oil, fingerprints or hand stains are transferred and adhered.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ⁺ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
A fingerprint remover containing a quaternary ammonium hydroxide represented by
(B) Solvent containing water and / or alcohol,
The first step of applying the solubilizer, which comprises the above, and the concentration of the fingerprint remover in the solubilizer is 0.05% by weight or more and 5.0% by weight or less, to the fiber.
The second step, in which the dissolving agent applied to the fibers is transferred to the surface of the member to dissolve the oil, hand stains, or fingerprints that have adhered to the surface of the member,
Utilizing the capillary phenomenon of fibers, it is transferred and adhered to the surface of a member constituting the appearance of the product, which comprises a third step of impregnating the fibers with a dissolving agent in which oil, hand stains or fingerprints are dissolved. It is preferable to use a method for removing oil, fingerprints or hand stains.

Specifically, the first step of applying the solubilizer to the fiber surface of a waste cloth, towel, microfiber cloth, cloth or the like by a general method such as spraying or dipping is carried out. Next, using the fibers coated with the dissolving agent, a second step is performed in which the fibers coated with the dissolving agent are brought into contact with the oil, hand stains, or fingerprints that have been transferred to the surface of the member and adhered to the surface of the member to dissolve them, and further, the capillary tube is further subjected to the second step. Utilizing the phenomenon, a removal method can be adopted in which the oil component dissolved in the dissolving agent, the sebum component other than the acidic substance, the sebum component of the acidic substance, the inorganic component, etc. are impregnated into the fiber and wiped off. ..

Here, further, the first step of applying the above-mentioned dissolving agent to the fiber and the second step of bringing the dissolving agent applied to the fiber into contact and transferring to the surface of the member to dissolve the oil, hand stains or fingerprints attached. The steps and the third step of impregnating the fibers with a dissolving agent that dissolves oil, hand stains, or fingerprints by utilizing the capillary phenomenon of the fibers will be described in detail.

The first step is to first apply the solubilizer to the surface of fibers such as a dry cloth, towel, microfiber cloth, cloth, etc. by a general method such as spraying or dipping.
Since the fingerprint remover in the solubilizer is composed of a surfactant having a concentration of 0.05% by weight or more, which is equal to or higher than the critical micelle concentration, the surface tension of the solubilizer is sufficiently small, and at the same time, an oil component. It has the effect of solubilizing sebum components other than or acidic substances in micelles, and rapidly dissolving oil, fingerprints or hand stains by the effect of interaction between the fingerprint remover and the sebum and inorganic components of acidic substances.
Further, the solubilizer is characterized in that the viscosity of the solubilizer is low because the fingerprint remover in the solubilizer is 5.0% by weight or less.
Therefore, it is suitable because the dissolving agent having a high dissolving ability for rapidly dissolving oil, fingerprints or hand stains can be quickly impregnated into the fine gaps in the fiber.
If the fibers are previously filled with fine gaps by a solvent such as water, the dissolving agent is diluted by the solvent such as water contained in the fibers to reduce the concentration, resulting in oil, fingerprints or hand stains. May reduce the effect of rapidly dissolving. In addition, since the dissolving agent is less likely to be invaded by the fibers, reattachment of the components may occur due to the liquid residue.

The second step is to use the fibers coated with the dissolving agent to bring the fibers coated with the dissolving agent into contact with the oil, hand stains or fingerprints transferred and adhered to the surface of the member to dissolve them.
Specifically, the dissolving agent adhering to the surface of the fiber and / or the force of pressing the fiber when a person wipes off the dirt causes the dissolving agent impregnated in the fine gaps in the fiber to move to the surface side of the fiber. The exuding agent, that is, the dissolving agent exuded between the surface of the fiber and the surface of the member, comes into contact with the oil, fingerprints, or stains on the hand stains that have been transferred to the surface of the member and are dissolved.
This is preferable because it has the effect of quickly dissolving oil, fingerprints, or hand stains.

The third step is to use the capillary phenomenon of the fiber to infiltrate the oil component dissolved in the dissolving agent, the sebum component other than the acidic substance, the sebum component of the acidic substance, the inorganic component, etc. into the fiber and wipe it off. be.
In order to effectively utilize the capillary phenomenon, it is generally said that the surface tension of the solution impregnating the fibers is low and the viscosity of the solution is low.
Since the surface tension of the solubilizer is sufficiently low and the viscosity of the solubilizer is low at the same time, the solubilizer dissolved in contact with oil, fingerprints or hand stains can be quickly impregnated into the fibers. It is suitable because there is little reattachment and unevenness is unlikely to occur.
Further, even if some unevenness or the like occurs on the surface of the member after the third step, since the degree of unevenness is slight, it should be wiped off by wiping with air or rinsing a small amount of water. Can be done.

By using a dissolving agent for removing oil, fingerprints, or hand stains that have been transferred and adhered to the surface of the member constituting the appearance of the product described above, and a removal method using the same, the appearance of the product having excellent appearance quality can be obtained. The surface of the constituent member can be easily obtained.

Hereinafter, the present invention will be described in more detail based on examples of preparation of a solubilizer, examples of preparation of a comparative solubilizer, and examples and comparative examples using them.
However, the present invention is not limited to the following preparation examples and examples of solubilizers.

[Preparation of solubilizer]
(Dissolving Agents 1-9, Comparative Dissolving Agents 1-5)
Table 1 shows a composition table of preparation examples of the solubilizers used in Examples and Comparative Examples, and preparation examples of the comparative solubilizers. The unit of the numerical value in the table is weight%.

(Dissolving agent 1)
200cc eggplant type containing 2.5g of 10% tetrabutylammonium hydroxide aqueous solution, 0.25g of polyoxyethylene lauryl ether, 87.25g of purified water and 10.0g of modified ethanol (mixed solution of ethanol, isopropyl alcohol and n-propyl alcohol). It was placed in a flask and stirred at room temperature for 1 hour to prepare a dissolving agent 1 having a fingerprint removing agent concentration of 0.5% by weight.
As an analysis example of tetrabutylammonium hydroxide, IR data, MS spectrum data, and ¹ H-NMR data can be confirmed from the spectrum database SDBS of organic compounds of the National Institute of Advanced Industrial Science and Technology.
https: // sdbs. db. aist. go. jp / sdbs / cgi-bin / direct_frame_disp. cgi? sdbsno = 17136

(Dissolving agent 2)
2.5 g of 10% tetrabutylammonium hydroxide aqueous solution, 0.25 g of polyoxyethylene lauryl ether, 1.0 g of sodium hydroxide, 86.25 g of purified water and denatured ethanol (mixed solution of ethanol, isopropyl alcohol and n-propyl alcohol) 10 .0 g was placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour to prepare a solubilizer 2 having a concentration of a fingerprint remover of 1.5% by weight.

(Dissolving agent 3)
0.5 g of a 10% tetrabutylammonium hydroxide aqueous solution and 99.5 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour. Was prepared.

(Dissolving agent 4)
0.5 g of a 10% tetrabutylammonium hydroxide aqueous solution, 0.05 g of polyoxyethylene lauryl ether and 99.45 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour to adjust the concentration of the fingerprint remover. 0.1 wt% solubilizer 4 was prepared.

(Dissolving agent 5)
0.5 g of 10% tetrabutylammonium hydroxide aqueous solution, 0.05 g of polyoxyethylene lauryl ether and 99.45 g of modified ethanol (mixed solution of ethanol, isopropyl alcohol and n-propyl alcohol) were placed in a 100 cc eggplant-shaped flask at room temperature. To prepare a solubilizer 5 having a concentration of the fingerprint remover of 0.1% by weight.

(Dissolving agent 6)
100 cc eggplant type containing 0.5 g of 10% tetrabutylammonium hydroxide aqueous solution, 0.05 g of polyoxyethylene lauryl ether, 89.45 g of purified water and 10.0 g of modified ethanol (mixed solution of ethanol, isopropyl alcohol and n-propyl alcohol). It was placed in a flask and stirred at room temperature for 1 hour to prepare a solubilizer 6 having a concentration of a fingerprint remover of 0.1% by weight.

(Dissolving agent 7)
0.5 g of 10% tetrabutylammonium hydroxide aqueous solution, 0.05 g of polyoxyethylene lauryl ether, 89.45 g of purified water, 5.0 g of denatured ethanol (mixed solution of ethanol, isopropyl alcohol, n-propyl alcohol) and 5.0 g of glycerin. Was placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour to prepare a solubilizer 7 having a concentration of a fingerprint remover of 0.1% by weight.

(Dissolving agent 8)
5.0 g of 10% tetrabutylammonium hydroxide aqueous solution, 0.5 g of polyoxyethylene lauryl ether, 1.0 g of sodium hydroxide and 93.5 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour. , A solubilizer 8 having a concentration of the fingerprint remover of 2.0% by weight was prepared.

(Dissolving agent 9)
15.0 g of a 10% tetrabutylammonium hydroxide aqueous solution, 1.5 g of polyoxyethylene lauryl ether, 2.0 g of sodium hydroxide and 81.5 g of purified water are placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour. , Dissolving agent 9 having a concentration of the fingerprint removing agent of 5.0% by weight was prepared.

(Comparative Dissolving Agent 1)
0.4 g of a 10% tetrabutylammonium hydroxide aqueous solution and 99.6 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour. 1 was prepared.

(Comparative Dissolving Agent 2)
60.0 g of a 10% tetrabutylammonium hydroxide aqueous solution and 40.0 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour. 2 was prepared.

(Comparative Dissolving Agent 3)
30.0 g of a 10% tetrabutylammonium hydroxide aqueous solution, 3.0 g of polyoxyethylene lauryl ether and 67.0 g of purified water were placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour to adjust the concentration of the fingerprint remover. 6.0% by weight of Comparative Dissolving Agent 3 was prepared.

(Comparative Dissolving Agent 4)
100 cc eggplant type containing 30.0 g of 10% tetrabutylammonium hydroxide aqueous solution, 3.0 g of polyoxyethylene lauryl ether, 57.0 g of purified water and 10.0 g of modified ethanol (mixed solution of ethanol, isopropyl alcohol and n-propyl alcohol). It was placed in a flask and stirred at room temperature for 1 hour to prepare a comparative solubilizer 4 having a concentration of a fingerprint remover of 6.0% by weight.

(Comparative Dissolving Agent 5)
10% tetrabutylammonium hydroxide aqueous solution 20.0 g, polyoxyethylene lauryl ether 2.0 g, sodium hydroxide 2.0 g, purified water 66.0 g and modified ethanol (ethanol, isopropyl alcohol, n-propyl alcohol mixed solution) 10 .0 g was placed in a 100 cc eggplant-shaped flask and stirred at room temperature for 1 hour to prepare a comparative solubilizer 5 having a concentration of a fingerprint remover of 6.0% by weight.

First, as the characteristic evaluation (1), the following characteristic evaluations shown in Examples 1 to 9 and Comparative Examples 1 to 5 were performed on the above solubilizers. The results are shown in Table 2.

[Characteristic evaluation (1)]
(Examples 1 to 9, Comparative Examples 1 to 5)
(Fingerprint removal appearance observation)
Metal surface of SUS304 (length 150 mm, width 70 mm, 0.7 mm thickness) test piece having an uneven structure with an average surface roughness (Ra) of 0.2 μm or more and less than 1.0 mm, which has been roughened by hairline processing. Fingerprints were attached to. Then, the solubilizers of Examples 1 to 9 and Comparative Examples 1 to 5 were sprayed on the metal surface, left to stand with the solubilizer attached to the surface for 1 minute, and then impregnated with the solubilizer by microfiber. The appearance when wiped off was visually confirmed. ○ when the fingerprint remover component does not remain on the surface and the fingerprint can be completely wiped off, △ when the fingerprint remover component does not remain on the surface but the fingerprint shadow remains △, the fingerprint remover component Was left on the surface, and the case where it was not possible to determine whether or not the fingerprint could be wiped off was marked with x.
The results are shown in Table 2.
Further, as an example of the appearance observation result, for example, the appearance observation result before and after wiping with the dissolving agent of Example 1, Comparative Example 1 and Comparative Example 2 is shown in FIG.

(Method of judging fingerprint adhesion by water contact angle)
The method for measuring the contact angle of water on a metal surface is to drop 0.8 μL to 1.2 μL of water on the surface and measure the contact angle at that time using a contact angle meter (DMe-210, manufactured by Kyowa Interface Science Co., Ltd.). The measurement was performed, and the average value of the measured values at three points was taken as the contact angle.
First, the contact angle of water on a clean surface obtained by washing the SUS304 test piece roughened by the above-mentioned hairline processing with a chlorine-based solvent was measured.
Next, using this value as a reference, the contact angle on the fingerprint when the fingerprint was attached and the contact angle when the fingerprint was removed were compared.
Here, FIG. 2 is a cross-sectional view showing a definition regarding a method for measuring the contact angle of water droplets on a SUS304 test piece roughened by hairline processing, and FIG. 2 is a flowchart of a method for determining the presence or absence of fingerprints adhering to the surface of a member. FIG. 4 shows a configuration diagram of the metal surface after fingerprints are attached to the SUS304 test piece roughened by hairline processing, and a cross-sectional view of measuring the contact angle of water of the fingerprints adhered to the metal surface.

(Water contact angle)
First, the contact angle of the reference clean metal surface was measured. First, the SUS304 test piece roughened by the above-mentioned hairline processing was washed with a chlorine-based solvent, 1 μL of water was dropped, and the contact angle of the water droplet was measured. The average value of the measured values at the three points was 85 °. was. Therefore, the reference angle considering the variation in the contact angle was set to 82 ° or more and 88 ° or less.
Next, a fingerprint was attached to the surface, and the contact angle when 1 μL of water was dropped onto the fingerprint was measured. Next, the solubilizers of Examples 1 to 9 and Comparative Examples 1 to 5 were sprayed on the metal surface to which the fingerprint was attached, left with the solution adhered to the surface for 1 minute, and then wiped off with a microfiber to contact the water droplets. The angle was measured. When the contact angle of water after wiping was 82 ° or more and less than 88 ° with respect to the reference angle, it was evaluated as ◯, and when it was less than 82 °, it was evaluated as x.
The results are shown in Table 2.
Here, as an example of measuring the contact angle of water, for example, before and after wiping the clean surface of the SUS304 test piece roughened by hairline processing with the dissolving agents of Example 1, Further Comparative Example 1 and Comparative Example 2. A cross-sectional view showing the contact angle of water is shown in FIG.
Further, after the fingerprint remover concentration in the solubilizer and the fingerprints are attached to the SUS304 test piece roughened by the hairline processing, the solubilizers of Examples 1 to 9 of the present invention and Comparative Examples 1 and 2 are further applied. FIG. 6 shows a graph showing the relationship with the contact angle of water after applying and wiping.

[Characteristic evaluation (2)]
Next, as the characteristic evaluation (2), the following characteristic evaluations shown in Examples 10 to 15 and Comparative Examples 6 to 11 were performed using other member materials instead of SUS304 roughened by hairline processing. rice field. The results are shown in Table 3, Table 4 and Table 5, respectively.

(Examples 10 to 15, Comparative Examples 6 to 11)
(Acrylic resin member)
Instead of a SUS304 (length 150 mm, width 70 mm, 0.7 mm thickness) test piece having an uneven structure with an average surface roughness (Ra) of 0.2 μm or more and less than 1.0 mm, which has been roughened by hairline processing. , Similar to the evaluation performed on the metal pieces of SUS304 roughened by hairline processing using a transparent acrylic resin test piece (manufactured by Standard Test Piece, length 150 mm, width 70 mm, thickness 2.0 mm). , Appearance observation of fingerprint removal property, contact angle on fingerprint when fingerprint was attached and contact angle when removed were compared.
The results are shown in Table 3.

(Slide glass member)
Next, using slide glass (manufactured by Matsunami Glass Industry Co., Ltd., length 76 mm, width 26 mm, thickness 1.2 mm), fingerprints were similar to the evaluation performed on the metal pieces of SUS304 roughened by hairline processing. The appearance of the removable appearance was compared, and the contact angle on the fingerprint when the fingerprint was attached and the contact angle when the fingerprint was removed were compared.
The results are shown in Table 4.

(Painted steel member)
Furthermore, by hairline processing using a member painted with epoxy paint on a steel plate (manufactured by Standard Test Piece, a steel plate with a length of 150 mm, a width of 70 mm, and a thickness of 4.0 mm coated with epoxy paint). Similar to the evaluation performed on the roughened metal piece of SUS304, the appearance observation of fingerprint removability, the contact angle on the fingerprint when the fingerprint was attached, and the contact angle when the fingerprint was removed were compared.
The results are shown in Table 5.

[Characteristic evaluation (3)]
Further, as the characteristic evaluation (3), instead of the method of removing fingerprints adhering to the SUS304 test piece roughened by the hairline processing of the characteristic evaluation (1), the SUS304 and the acrylic resin member material roughened by the hairline processing The following characteristic evaluations shown in Examples 16 to 19 and Comparative Examples 12 to 15 were performed using the above. The results are shown in Table 6.

(Examples 16 to 19, Comparative Examples 12 to 15)
(Fingerprint removal appearance observation and water contact angle)
Metal surface of SUS304 (length 150 mm, width 70 mm, 0.7 mm thickness) test piece having an uneven structure with an average surface roughness (Ra) of 0.2 μm or more and less than 1.0 mm, which has been roughened by hairline processing. Fingerprints were attached to the resin surface of the transparent acrylic resin test piece (manufactured by Standard Test Piece, length 150 mm, width 70 mm, thickness 2.0 mm). Then, the solubilizers of Examples 16 to 19 and Comparative Examples 12 to 15 were sprayed twice on each microfiber cloth at an injection amount of about 0.2 g, applied to the fibers, and adhered to each test piece. The appearance when the fingerprint was immediately wiped off was visually confirmed. ○ when the fingerprint remover component does not remain on the surface and the fingerprint can be completely wiped off, △ when the fingerprint remover component does not remain on the surface but the fingerprint shadow remains △, the fingerprint remover component Was left on the surface, and the case where it was not possible to determine whether or not the fingerprint could be wiped off was marked with x.
Further, as in the evaluation performed on the metal piece of SUS304 roughened by the hairline processing of the characteristic evaluation (1), the contact angle on the fingerprint when the fingerprint was attached and the contact angle when the fingerprint was removed were compared.
The results are shown in Table 6.

[Evaluation result (1)]
From the results of the characteristic evaluation (1), in each of the evaluations of Examples 1 to 9, good results were shown in both the appearance and the contact angle after fingerprint removal. On the other hand, in Comparative Example 1, the fingerprint did not disappear completely after the fingerprint was removed, and the contact angle was a value of 62 ° due to the influence of the component caused by the fingerprint. Further, in Comparative Examples 2 to 5, it was not possible to determine whether or not the fingerprint remover remained on the surface and the fingerprint could be wiped off. Further, since the contact angle of this surface is 20 ° or less, it is presumed that the contact angle is lowered because the water-soluble fingerprint remover component remains on the surface. From these facts, it was clarified that Comparative Examples 1 to 5 were inferior to Examples 1 to 9.

[Evaluation result (2)]
From the result of the characteristic evaluation (2), in Examples 10 to 15, good results were shown in both the appearance and the contact angle after fingerprint removal on the surface of any of the members. On the other hand, in Comparative Example 6, Comparative Example 8 and Comparative Example 10, the fingerprint did not completely disappear after the fingerprint was removed, and the contact angle was a value of around 60 ° due to the influence of the component caused by the fingerprint. Further, in Comparative Example 7, Comparative Example 9 and Comparative Example 11, it was not possible to determine whether or not the fingerprint remover remained on the surface and the fingerprint could be wiped off. Further, since the contact angle of this surface is 20 ° or less, it is presumed that the contact angle is lowered because the water-soluble fingerprint remover component remains on the surface. From these facts, it was clarified that Comparative Examples 6 to 11 were inferior to Examples 10 to 15.

[Evaluation result (3)]
From the results of the characteristic evaluation (3), in Examples 16 to 19, good results were shown in both the appearance and the contact angle after fingerprint removal on all the member surfaces. On the other hand, in Comparative Example 12 and Comparative Example 14, the fingerprint did not completely disappear after the fingerprint was removed, and the contact angle was a value of around 60 ° due to the influence of the component caused by the fingerprint. Further, in both Comparative Example 13 and Comparative Example 15, the fingerprint remover remained on the surface, and it was not possible to determine whether or not the fingerprint could be wiped off. Further, since the contact angle of this surface is 20 ° or less, it is presumed that the contact angle is lowered because the water-soluble fingerprint remover component remains on the surface. From these facts, it was clarified that Comparative Examples 12 to 15 were inferior to Examples 16 to 19.

[summary]
From the above results, the dissolving agent and the removing method of the present invention are present on the surface of a member such as a metal material, a plastic material, a glass material, a painted metal or a resin material which constitutes the appearance of the product which is the final form. It easily penetrates into minute recesses, and it quickly dissolves oil, fingerprints or hand stains that have been firmly transferred and adhered, and even if there is no rinsing process with a large amount of water or rinsing process with water, oil, fingerprints or hand stains , The component contained in the cleaning agent can be used as a dissolving agent for quickly removing without remaining on the surface of the member, and by this effect, oil, fingerprints or hand stains on the surface of the member can be easily removed.

Although preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention easily penetrates into minute recesses existing on the surface of a member such as a metal material, a plastic material, a glass material, a painted metal or a resin material that constitutes the appearance of a product in the final form, and is firmly transferred. Quickly dissolves the adhered oil, fingerprints or hand stains, and quickly without leaving oil, fingerprints, hand stains or fingerprint remover on the surface of the material without the process of rinsing with a large amount of water or rinsing with water. It can be used as a dissolving agent for removing, and further, due to this effect, oil, fingerprints or hand stains on the surface of the member can be easily removed, so that the surface of the member constituting the appearance of the product having excellent appearance quality can be obtained. It is industrially useful because it can be easily obtained.

1 Hairline-processed SUS304 test piece 2 Appearance after the fingerprint of Example 1 is attached 2a Appearance after wiping of Example 1 3 Appearance after wiping of Comparative Example 1 3a After wiping of Comparative Example 1 Appearance 4 Appearance after attaching the fingerprint of Comparative Example 2 4a Appearance after wiping off the fingerprint of Comparative Example 2 5 Hairline-processed SUS304 test piece 5a Concavo-convex portion on the surface of the metal base material 5b Cross-sectional direction line obtained by cutting the metal base material. 6 Water droplets 6a Water droplets on a clean surface 6b Water droplets on a fingerprint 6c Water droplets on a metal surface on which a fingerprint was present 7 Reference line where the surface of a metal substrate and water droplets contact 8 Water droplet tangent line based on a reference line 8a Water droplet tangent line on a clean surface 8b Water droplet tangent on fingerprint 8c Water droplet tangent on metal surface where fingerprint was present 9 Water droplet contact angle 9a Water droplet contact angle on clean surface 9b Water droplet contact angle on fingerprint 9c Water droplet on metal surface where fingerprint was present Contact angle 10 Fingerprint 10a Position on the metal surface where the fingerprint was present 11 Hairline-processed SUS304 test piece 12 Water droplets on the clean surface 12a Water droplets on the surface of Example 1 12b Water droplets on the fingerprint remaining on the surface of Comparative Example 1 12c Comparison Water droplets on the fingerprint remover remaining on the surface of Example 2 13 Water droplet tangent on the clean surface 13a Water droplet tangent 13b of Example 1 Water droplet tangent 13c on the fingerprint remaining on the surface of Comparative Example 1 On the surface of Comparative Example 2 Contact angle of water droplets on the remaining fingerprint remover 14 Contact angle of water droplets on the clean surface 14a Contact angle of water droplets of Example 1 14b Contact angle of water droplets on the surface of Comparative Example 1 14c Contact angle of water droplets on the surface of Comparative Example 2 14c On the surface of Comparative Example 2 Contact angle of water droplets on the remaining fingerprint remover 15 Fingerprints remaining on the surface of Comparative Example 1 16 Fingerprint remover remaining on the surface of Comparative Example 2

Claims (4)

A dissolving agent for removing oil, fingerprints, or hand stains that have been transferred and adhered to the surface of members that make up the appearance of the product.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ^＋ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
Quaternary ammonium hydroxide represented by
(B) Nonionic surfactant and
(C) One or more compounds selected from sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium carbonate, potassium carbonate, ammonia, trimethylamine, triethylamine, pyridine, N-methyl-2-pyrrolidone, And including fingerprint remover,
(D) Solvent containing water and / or denatured ethanol,
It is a solubilizer consisting of 0.25% by weight or more and 1.5% by weight or less of the component (A) and 0.25% by weight or more and 1.5% by weight of the component (B) in the solubilizing agent. %Less than,
The concentration of the component (C) is 0% by weight or more and 2.0% by weight or less.
Further, the concentration of water of the component (D) in the solubilizer is 88.5% by weight or more and 99.95% by weight or less, and the concentration of denatured ethanol is 5.0% by weight or more and 10.0% by weight or less.
Further, the dissolving agent dissolves the oil, fingerprints or hand stains that have been transferred and adhered to the surface of the member that constitutes the appearance of the product, and uses the capillary phenomenon of the fibers to dissolve the oil, fingerprints or hand stains. A dissolving agent that is impregnated into fibers and wiped off, and removes oil, fingerprints, or hand stains that are transferred and adhered to the surface of a member that constitutes the appearance of the product, which has a viscosity that impregnates the fibers. Dissolving agent. On the surface of a member constituting the appearance of a product, wherein the mixing ratio of the quaternary ammonium hydroxide of the fingerprint remover according to claim 1 and the nonionic surfactant is 1: 1 by weight. , A solubilizer that removes oil, fingerprints or hand stains that have been transferred and adhered. Oil, fingerprints, or hand stains are transferred to the surface of the member that constitutes the appearance of the product.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ^＋ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
Quaternary ammonium hydroxide represented by
(B) Nonionic surfactant and
(C) One or more compounds selected from sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium carbonate, potassium carbonate, ammonia, trimethylamine, triethylamine, pyridine, N-methyl-2-pyrrolidone, And including fingerprint remover,
(D) Solvent containing water and denatured ethanol,
It is a solubilizer consisting of 0.25% by weight or more and 1.5% by weight or less of the component (A) and 0.25% by weight or more and 1.5% by weight of the component (B) in the solubilizing agent. %Less than,
The concentration of the component (C) is 0% by weight or more and 2.0% by weight or less.
Further, the solubilizer in which the concentration of water of the component (D) in the solubilizer is 88.5% by weight or more and 99.95% by weight or less and the concentration of denatured ethanol is 5.0% by weight or more and 10.0% by weight or less. The first step of applying
Utilizing the capillary phenomenon of fibers, the fibers are impregnated with a dissolving agent that dissolves oil, hand stains, or fingerprints. A method for removing oil, fingerprints, or hand stains that have been transferred and adhered to the surface of a member that constitutes the appearance of the product, which comprises the second step of making the product. Oil, fingerprints, or hand stains are transferred to the surface of the member that constitutes the appearance of the product.
(A) General formula (1)
[(C _n H _{2n + 1} ) ₄ N ^＋ ] OH ⁻ (1)
(In the formula, n is an integer from 3 to 18.)
Quaternary ammonium hydroxide represented by
(B) Nonionic surfactant and
(C) One or more compounds selected from sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium carbonate, potassium carbonate, ammonia, trimethylamine, triethylamine, pyridine, N-methyl-2-pyrrolidone, And including fingerprint remover,
(D) Solvent containing water and denatured ethanol,
It is a solubilizer consisting of 0.25% by weight or more and 1.5% by weight or less of the component (A) and 0.25% by weight or more and 1.5% by weight of the component (B) in the solubilizing agent. %Less than,
The concentration of the component (C) is 0% by weight or more and 2.0% by weight or less.
Further, the solubilizer in which the concentration of water of the component (D) in the solubilizer is 88.5% by weight or more and 99.95% by weight or less and the concentration of denatured ethanol is 5.0% by weight or more and 10.0% by weight or less. The first step of applying ethanol to the fibers,
The second step, in which the dissolving agent applied to the fibers is transferred to the surface of the member to dissolve the oil, hand stains, or fingerprints,
The third step, which utilizes the capillary phenomenon of fibers to impregnate the fibers with a dissolving agent that dissolves oil, hand stains, or fingerprints.
A method for removing oil, fingerprints, or hand stains that have been transferred and adhered to the surface of a member that constitutes the appearance of a product.

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