JP2013071952A - Antifouling coating and electronic appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antifouling coating used for the surface treatment of a housing of an electronic appliance storing a heating element and sustaining the wipe-off property with respect to sebum dirt.SOLUTION: The antifouling coating includes: a porous substance impregnated with an oil component having predetermined viscosity characteristics with respect to temperature change; and a thermoplastic resin coating with the porous substance added.

Description

  The present invention relates to an antifouling paint that is used for surface treatment of a housing of an electronic device having a built-in heating element and has good wiping property against sebum dirt, and an electronic device coated with the antifouling paint.

  For casings of electronic devices, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, ABS, polycarbonate-ABS mixed resin, vinyl chloride resin, triacetyl cellulose and the like are widely used. Application of these plastic products to the housing of an electronic device is due to excellent lightness, ease of processing, impact resistance, and the like. However, plastic products have a drawback that they are easily damaged because of their low surface hardness, making it difficult to use plastic products depending on where electronic devices are used.

  For this reason, an active energy ray-curable hard coating agent is coated on the surface of a plastic product in order to impart surface hardness. However, the hardened layer made of the active energy ray-curable hard coating agent has a problem in that sebum dirt easily adheres to the surface and the attached dirt cannot be easily wiped off. Adhering sebum stains detract from the aesthetics of the product.

  The surface of the casing of electronic devices such as laptop computers is often touched by hand, and the surface of the coating applied to the casing surface is likely to be contaminated with sebum such as fingerprints. Is desired. To solve this problem, we proposed a technology to improve the antifouling property by applying an energy ray curable resin containing an antifouling agent having a perfluoroalkyl group to the plastic surface to make the surface water and oil repellent. Has been. There has also been proposed a method of introducing a water-repellent silicone resin skeleton such as a polydimethylsiloxane group to make the plastic surface water- and oil-repellent.

  Even with these methods, in applications where human hands are in contact, such as notebook PCs that are carried around, oily dirt such as sebum that touches the casing is repelled due to oil repellency, and fine oils are removed. There was a problem that it was scattered as a lump and the stains were conspicuous.

Japanese Patent Laid-Open No. 10-104403 Japanese Patent Laid-Open No. 10-7986

  As described above, in an electronic device such as a notebook PC that is carried by a user or that opens and closes a lid, even if the surface of the casing is subjected to antifouling treatment with water and oil repellency, oily dirt such as sebum remains. It was repelled and the contaminated area expanded.

  According to one aspect of the embodiment, the present invention includes a porous material impregnated with an oil having a viscosity characteristic with respect to a predetermined temperature change, and a thermoplastic resin paint to which the porous material is added. Dirty paint is provided.

  According to another aspect of the embodiment, the electronic device is provided with a heating element inside and the surface of the housing is coated with an antifouling paint, and the antifouling paint is impregnated with an oil component having a viscosity characteristic with respect to a predetermined temperature change. On the antifouling coating formed by applying the antifouling paint, and the porous material is heated by the temperature rise by the heating element. It is possible to provide an electronic device characterized by having an oil film formed by oil components that have exuded from a material.

  By adding a porous material impregnated with oil to the resin paint, the effect of being able to easily remove sebum stains on the surface by the oil oozing out on the surface after coating.

It is a figure which shows the example of preparation of an antifouling paint. It is a figure which shows the temperature / viscosity characteristic of an oil component. It is a figure which shows the sample of an Example and a comparative example, and a wiping property evaluation point. It is a figure which shows the antifouling coating example (the 1) of notebook PC. It is a figure which shows the antifouling coating example (the 2) of notebook PC. It is a figure which shows the antifouling coating example (the 3) of notebook PC.

  FIG. 1 is a diagram showing a flow of creating the disclosed antifouling paint. Here, zeolite 100 (Zeofil CP: manufactured by Shintohoku Chemical Industry) having a particle size of about 0.3 mm is used as a porous material, and the oil content is shown. Silicone oil (HVAC-F-4: Shin-Etsu Silicone) 200 is used. First, after putting zeolite 100 in a vacuum vessel and reducing the pressure to 0.01 Torr, liquid silicone oil 200 is injected into the vacuum vessel and vacuum impregnated (S1). After the vacuum impregnation, the vacuum vessel is opened to atmospheric pressure, the zeolite 100 impregnated with the silicone oil 200 is taken out and pulverized with a hammer mill. In order to make the pulverized zeolite 100 finer, it is applied to an airflow type pulverizer to obtain a zeolite 100 having a particle size of about 0.2 μm (S2).

  Next, the finely divided zeolite 100 is added to a silicone resin (KR-251: Shin-Etsu Silicone) 300 which is a resin paint (S3). Here, the added amount is 10 parts by weight of zeolite 100 with respect to 100 parts by weight of silicone resin 300. Stir well with a stirrer to disperse the zeolite 100 in the silicone resin 300 (S4). This completes the antifouling paint 400.

  In the above example, the porous material is impregnated with the oil and then pulverized. However, the pulverized porous material may be put in a vacuum container and decompressed, and then impregnated with the oil. The zeolite used has a particle size of 0.2 μm, but the particle size is not particularly limited. However, if the particle size is too large, the coating surface may become rough and the gloss may be lost, or the porous material may fall off the coating film and cause a hole in the coating film. On the other hand, when the particle size of the porous material is extremely small, the amount of oil that can be retained by the porous material is small, and there is a problem in maintaining the wiping performance for a long period of time.

  The amount of the porous material added to the resin coating is desirably 10 to 30 parts by weight of the porous material with respect to 100 parts by weight of the resin coating. If the amount of the porous material added is too large, the coated film (coating film) becomes brittle and may be peeled off with a slight impact. On the other hand, if the amount of the porous material added is too small, the amount of oil retained will be small, and it will be difficult to maintain the wiping performance for a long period of time.

  The resin paint, porous material and oil component constituting the antifouling paint will be described in more detail.

  The base resin paint is a thermoplastic resin such as siloxane, polymethyl methacrylate, vinylidene chloride / acrylonitrile copolymer, polyvinyl alcohol, polyvinyl butyral, polymethyl methacrylate, polycarbonate, polyurethane, polyacrylonitrile or polyvinylidene chloride. Polysulfone or the like can be used. These thermoplastic resins can be diluted with an organic solvent, and the viscosity of the paint can be adjusted.

  The porous material preferably has fine pores, has a property of being chemically stable and adsorbing a large amount of oil, and easily releasing the adsorbed oil under predetermined conditions. For example, an inorganic porous material generally satisfies this condition, and silica gel, alumina, etc. are suitable in addition to zeolite. The porous material shown in this example has a low surface activity and does not chemically bond with the adsorbing material, so that the adsorbed material is easily released and is suitable for the disclosed antifouling paint. In particular, zeolite is optimal because it has a very large specific surface area per unit weight and low surface activity.

  The oil component to be impregnated must be chemically stable and the viscosity change with respect to the temperature change must satisfy certain conditions. For example, in addition to silicone oil, castor oil, coconut oil, sunflower oil, soybean oil, rapeseed oil, linseed oil, poppy oil and the like can be used.

  As for the change of the viscosity with respect to the temperature change of the oil component, for example, the one showing the temperature / viscosity characteristic as shown in FIG. That is, at a temperature lower than about 25 ° C., the viscosity greatly decreases with increasing temperature, and at a temperature exceeding 25 ° C., the viscosity change gradually decreases with increasing temperature. That is, the amount of change in viscosity decrease from 30 ° C. to 40 ° C. is lower than the amount of change in viscosity decrease from 10 ° C. to 20 ° C.

  Note that the temperature around 25 ° C. is assumed to be room temperature, and by giving such a viscosity characteristic, the oil flowing out of the porous material is suppressed by increasing the viscosity at a temperature lower than room temperature. In a high state, the viscosity is lowered to create a state in which oil easily flows out of the porous material. The viscosity between temperatures of 30 ° C. and 40 ° C. monotonously decreases in the range of 14 mPas at the maximum and 4 mPas at the minimum. The reason why the rate of viscosity reduction is suppressed from 30 ° C. to 40 ° C. is to maintain an optimal viscosity state. That is, the reason why 14 mPas to 4 mPas is considered good is to keep the oil film thickness around 100 nm.

  In particular, the temperature around 40 ° C. is a temperature that assumes the temperature of the housing surface when the electronic device is driven, and when the disclosed antifouling paint is applied to the housing of the electronic device, the porosity in the coating film As the oil impregnated in the substance has this temperature / viscosity characteristic, the viscosity decreases to 10 mPas or less as the casing temperature rises, the oil flows out of the porous substance, passes through the resin paint, and bleeds onto the coating surface. Exit to form an oil film. It is considered that the oil film thickness for wiping off should be 100 nm or more, and from the results shown in the examples described later, the case of the electronic device becomes 40 ° C. and the oil content becomes 10 mPas or less, resulting in a viscosity of 100 nm or more. The oil film thickness is considered to be formed.

  If the viscosity of the oil is much higher than the temperature / viscosity characteristics shown in Fig. 2, the oil that oozes into the coating film is small even when the electronic device is driven, and an oil film with sufficient wiping property cannot be formed. descend. Further, when the viscosity of the oil component is considerably lower than the temperature / viscosity characteristics shown in FIG. 2, the oil component that exudes to the surface of the coating film is too much and the housing surface is wet with oil, which is not aesthetically pleasing. Furthermore, since the supply amount of oil becomes larger than necessary, it is difficult to maintain the wiping performance for a long time. In addition, when the temperature shown in FIG. 2 becomes higher (50 ° C. or higher), the amount of oil supplied is larger, but the usage conditions at high temperatures from the provision of the operation guarantee temperature and storage temperature of the electronic equipment, Or the storage environment is uncommon and we do not consider applying the disclosed antifouling paint to such conditions.

  In addition, in order to satisfy the temperature / viscosity characteristics shown in FIG. 2, two or more kinds of oils listed above are mixed and used. Further, a mixture of silicone oil and vegetable oil may be used.

  As shown in FIG. 3, samples of Examples 1 to 6 in which the conditions of the test piece and the antifouling paint were changed were prepared, and the wiping property was evaluated for them. Moreover, in order to confirm the effect of an Example by comparison, the sample of the comparative example of the conditions shown in FIG. 3 was created, and the same wiping property evaluation was performed.

The preparation conditions for each sample are the same for the test piece material, and the surface treatment conditions such as the presence or absence of coating are changed. The preparation conditions for the antifouling paint are the presence or absence of the porous material to be put in the resin paint and the porous material. It was decided to change the type and blending ratio of the oil impregnated in and the presence or absence of a colorant. In addition, the sample temperature at the time of wiping evaluation is also changed for evaluation. The material of the resin paint and the coating conditions of the antifouling paint are the same in each sample except for Comparative Example 1. The preparation conditions of the samples of each Example and Comparative Example and the evaluation points of wiping properties are as follows.
Example 1
Example 1 is an example in which one kind of silicone oil was used as the oil component.
Test piece The material is polycarbonate and the size is 100 mm x 100 mm x 2 mm. Acrylic resin coating (coating thickness: 15 μm) is applied to the test piece.
Antifouling paint and painting method Zeolite CP impregnated with 100 parts by weight of Loxane resin (KR-251: Shin-Etsu Silicone) as a resin paint and impregnated with silicone oil (HVAC-F-4: Shin-Etsu Silicone) as an oil component : New Tohoku Chemical Co., Ltd.) 10 parts by weight. This silicone oil satisfies the temperature / viscosity characteristics shown in FIG. The zeolite has a particle size of 0.2 μm.

The antifouling paint was applied to a test piece by a spray coater, left to stand at room temperature for 10 minutes, and the zeolite was precipitated, followed by heat drying at 40 ° C. for 10 minutes. In addition, the coating-film thickness of the antifouling paint after heat drying is 10 μm.
・ Wipeability evaluation method Place a test piece coated with antifouling paint on a sample mounting table at 40 ° C for 1 hour, and then draw a straight line with a width of 2 mm and a length of 30 mm from the antifouling paint using an oil marker. Painted. After drawing a straight line, a commercially available tissue paper is brought into contact with the test piece at a pressure of 4.9 N, and the residue of the oil marker after having been reciprocated three times in the length direction is examined, and the following evaluation points are given.
A score of 4 or higher is accepted.

Evaluation point 5: No oil marker residue Evaluation point 4: Slight oil marker residue is observed Evaluation point 3: Total oil marker line length is 15 mm or less Evaluation point 2: Total oil marker line length Exceeds 15 mm and less than 25 mm Evaluation point 1: Total length of oil marker lines is 25 mm or more. Antifouling evaluation result The wiping evaluation score of Example 1 was “5”.

Among the conditions of Example 1 described above, the material and size of the test piece, the use of zeolite as the porous material, the coating method of the antifouling paint, and the evaluation method are the same for each sample.
(Example 2)
Example 2 is an example using a mixture of two types of silicone oil as the oil. Other points than the oil component are the same as those in the first embodiment.
-Composition of antifouling paint Two types of silicone oils (HVAC-F-4 and KF-56: both Shin-Etsu silicones) are mixed at a ratio of 7: 3 and impregnated in zeolite. The proportion of zeolite added to the resin coating is the same as in Example 1. The viscosity characteristics of the mixed silicone oil satisfy the temperature / viscosity characteristics shown in FIG.
-Antifouling property evaluation result The wiping property evaluation point of Example 2 was "5".
(Example 3)
Example 3 is an example in which two kinds of vegetable oils are mixed as the oil, and the other points are the same as Example 1.
-Composition of antifouling paint Two kinds of plant oils (Ecomate AR-1 and Ecomate CR-1: Nisshin Oilio Group) are mixed at a ratio of 5: 5 and impregnated in zeolite. The proportion of zeolite added to the resin coating is the same as in Example 1. The mixed vegetable oil satisfies the temperature / viscosity characteristics shown in FIG.
-Antifouling property evaluation result The wiping property evaluation score of Example 3 was "5".
Example 4
Example 4 is an example using a mixture of vegetable oil and silicone oil as the oil, and the other points are the same as Example 1.
-Composition of antifouling paint Plant oil (Ecomate AR-1: Nisshin Oillio Group) and silicone oil (KF-56: Shin-Etsu Silicone) are mixed at a ratio of 8: 2 and impregnated in zeolite. The proportion of zeolite added to the resin coating is the same as in Example 1. Further, the mixed oil satisfies the temperature / viscosity characteristics shown in FIG.
-Antifouling property evaluation result The wiping property evaluation score of Example 4 was "5".
(Example 5)
Example 5 is an example in which a mixture of silicone oil and dry oil, which is a kind of vegetable oil, is used as the oil, and the other points are the same as Example 1.
-Composition of antifouling paint Drying oil (Linseed oil: Holbein Kogyo) and silicone oil (HVAC-F-4: Shin-Etsu Silicone) are mixed at a ratio of 2: 8 and impregnated in zeolite. The proportion of zeolite added to the resin coating is the same as in Example 1. Further, the mixed oil satisfies the temperature / viscosity characteristics shown in FIG.
-Antifouling property evaluation result The wiping property evaluation score of Example 5 was "4".
(Example 6)
In Example 6, the same silicone oil as in Example 1 was used as the oil component, but the test piece was not coated and a colorant was added to the antifouling paint. In Examples 1 to 5, the test piece was coated with an acrylic resin paint and further an antifouling paint was applied. Here, the antifouling paint is evaluated in an unpainted state. It is assumed that an antifouling paint containing a colorant is used by coating the housing.
-Composition of antifouling paint Zeolite (Zeofil CP: Shintohoku) impregnated with silicone oil (HVAC-F-4: Shin-Etsu Silicone) for 100 parts by weight of Loxane resin (KR-251: Shin-Etsu Silicone) as a resin paint 10 parts by weight of Chemical Industries) is added. Furthermore, 5 parts by weight of carbon black (HCF # 2650: Mitsubishi Chemical) is added as a colorant.
・ Test piece is unpainted.
-Antifouling property evaluation result The wiping property evaluation score of Example 6 was "5".

Comparative Examples 1 to 3 for comparison with Examples 1 to 6 are as follows.
(Comparative Example 1)
This is a comparative example when no antifouling paint is applied, and the other conditions are the same as those in Example 1. Comparative Example 1 is for comparative evaluation of the presence or absence of the effect of the antifouling paint.
-Antifouling property evaluation result The wiping property evaluation point of the comparative example 1 was "1".
(Comparative Example 2)
This is a comparative example in which the same antifouling paint as in Example 1 was applied and the temperature of the test piece was 25 ° C. The main purpose of the disclosed antifouling paint is mainly to obtain antifouling properties for the housing of electronic equipment. As mentioned above, when the housing is warmed by the heat generated by the electronic equipment, the zeolite is impregnated. The oil component is leached on the surface of the antifouling coating film to form an oil film, which improves the wiping property. In Comparative Example 2, 25 ° C. assumes that the electronic device is stopped. In the evaluation, the test piece was left at 25 ° C. for 1 hour, and then the surface was wiped with tissue paper. Further, after left at 25 ° C. for 1 hour, a straight line was drawn with an oil marker.
-Antifouling property evaluation result The wiping property evaluation score of Comparative Example 2 was "3".
(Comparative Example 3)
This is a comparative example in which only the silicone oil is added except for the zeolite in the antifouling paint of Example 1. Comparative Example 3 is for confirming whether a sufficient oil film can be supplied by zeolite to exert the wiping effect. Evaluation was made by leaving the test piece at 40 ° C. for 1 hour, wiping the surface of the test piece with tissue paper, and then leaving it for another hour, and then drawing a straight line with an oil marker.
-Composition of antifouling paint 10 parts by weight of silicone oil (HVAC-F-4: Shin-Etsu Silicone) is added to 100 parts by weight of Loxane resin (KR-251: Shin-Etsu Silicone) which is a resin paint.
-Antifouling property evaluation result The wiping property evaluation score of Comparative Example 3 was "3".

Next, the wipeability evaluation points (hereinafter simply referred to as evaluation points) of each sample are examined. As shown in FIG. 3, the evaluation score for the samples of Examples 1 to 6 is “4” (pass score) or more,
Satisfactory results could be confirmed with respect to the wipeability of the disclosed antifouling paint against sebum stains. The mechanism of wiping off sebum dirt is that an oil film made of silicone or the like is formed on the surface of the antifouling paint film, so the oil film of the antifouling paint film does not directly contact the surface of the acrylic resin coating on the test piece. It is presumed that sebum stains are wiped off together with the oil film by rubbing them with tissue paper when they are on the top or melted.

  In Examples 1 to 6, only Example 5 had an evaluation score of “4”, which was lower than the others, but this was presumed that the oil-based marker caused a slight reaction with dry oil, resulting in a decrease in wiping performance. To do.

  The evaluation score of Comparative Examples 1 to 3 was not more than “3” with respect to the evaluation of the passing score of each example, and the evaluation of the wiping property was low. From the evaluation result of Comparative Example 1 in which no antifouling paint is applied (that is, evaluation point “1”), if sebum dirt is attached to the surface of the coated housing, it can be wiped off even by rubbing with tissue paper. It was confirmed that the sebum adhered without being left (that is, sebum dirt adhered). Moreover, from the evaluation result of Comparative Example 2 (that is, evaluation point “3”), it was confirmed that even when the antifouling paint of Example 1 was applied, the wiping performance was not exhibited if the temperature was low. This is thought to be because the viscosity of the oil component increases because the temperature of the antifouling coating film is low, and the oil component does not ooze out to the surface of the coating film or is extremely small even if it is performed. In actual use of the electronic device, the oil film formed during operation remains on the stopped casing of the electronic device, and the wiping property does not deteriorate. In addition, at a temperature below room temperature, rather, the supply of oil is stopped and kept in a porous material, so that the antifouling performance can be maintained for a long time. Further, from the evaluation result of Comparative Example 3 (that is, the evaluation point “3”), the oil film is limited to the silicone oil on the surface of the antifouling coating film, and the evaluation point “3” is that oil is not continuously supplied. It is thought that it shows the result of "."

  Next, an example of antifouling coating on a notebook PC that is an electronic device will be described with reference to FIGS. FIG. 4 is a diagram showing an example of the antifouling coating of a notebook PC using the above-described antifouling paint 400. The material of the casing of the notebook PC 500 that is not subjected to antifouling in FIG. 4 is polycarbonate, and the surface of this polycarbonate is coated with an acrylic resin coating of about 15 μm. The locations of the notebook PC 500 where the antifouling paint 400 is applied are the top surface (surface to be a lid) and the bottom that the hand touches when carrying. An appropriate amount of the antifouling paint 400 is put in a spray gun cup, and the notebook PC 500 is sprayed from above the top plate surface in a horizontal state (S11). After coating the entire top plate surface, the zeolite 100 is left to settle below the silicone resin 300 for 10 minutes at room temperature (S12). Then, it puts into a 40 degreeC drying furnace for 10 minutes, and complete | finishes the drying of the surface of a top plate (S13). Subsequently, the same spray coating is performed with the bottom surface of the notebook PC 500 facing up. FIG. 5A is a view showing a state in which the top surface of the notebook PC 500 is painted by the spray gun 600. The antifouling paint 400 put in the cup 610 of the spray gun 600 is made into a mist by the pressurized air 620 and poured onto the notebook PC 500 to be painted. FIG. 5B shows a notebook PC 510 that has been painted. The notebook PC 510 includes a heating element such as an electronic component such as a CPU or a light source of a liquid crystal display inside the casing. When the notebook PC 510 is in an operating state when the power is turned on, the casing is approximately 40 by the heating element. The temperature rises to ℃. In the antifouling coating film applied to the casing of the notebook PC 510, oil rises from the zeolite in the antifouling coating film due to this temperature rise, and an oil film is formed on the surface. Since this oil film is oleophilic, it has the effect of dissolving sebum stains such as fingerprints to make the stains inconspicuous and can be easily removed by wiping.

  The antifouling coating film 410 of the anti-fouling notebook PC 510 is shown in FIG. In FIG. 6, first, a notebook PC 510 includes a casing 511 that is coated with acrylic resin (this coating film is referred to as a casing coating film 513) and a heating element 512 that is accommodated in the casing 511. The The heating element 512 is an electronic circuit mounted on a printed circuit board, for example. An antifouling coating film 410 made of the antifouling paint 400 is formed on the housing coating film 513 (surface), and an oil film 420 is formed on the surface of the antifouling coating film 410.

  Due to the above-described step of standing at room temperature after application of the antifouling paint 400 (S12), there are many zeolites 100 impregnated with silicone oil below the antifouling coating 410 (on the casing side of the notebook PC 510) as shown in FIG. The silicone resin 300 is unevenly distributed on the upper side (surface side). By doing so, the surface of the antifouling coating film has a high density of the resin paint, which is a silicone resin, and can be applied with gloss.

  In the oil film 420, the antifouling coating film 410 is warmed by the heat of the heating element 512 due to the operation of the notebook PC 510, and the silicone oil flows out of the zeolite 100 in the antifouling coating film 410. It is formed by exuding on the surface of the dirty coating 410. Since the oil film is also lipophilic, the sebum dirt dissolves in this oil film, and the oil film is not conspicuous because the oil film does not become a mass of fine oil. Moreover, by wiping the surface of the housing with something like tissue paper, the dirt is wiped off together with the oil film. The disclosed antifouling paint may be applied to the display surface of a mobile phone, for example. The display surface of mobile phones has recently been equipped with a multi-touch function, but the oil film provides anti-fouling and multi-touch with good sliding.

  Although the examples of the disclosed antifouling paint have been described above, they are not limited to the above-described contents, and can be implemented in various modes without departing from the gist.

In addition to the above examples, the following additional notes are disclosed.
(Appendix 1)
A porous material impregnated with an oil having viscosity characteristics for a predetermined temperature change;
An antifouling paint comprising: a thermoplastic resin paint to which the porous material is added.
(Appendix 2)
The porous material is zeolite;
The antifouling paint according to Supplementary Note 1, wherein
(Appendix 3)
The viscosity characteristic with respect to the temperature change of the oil component decreases with increasing temperature, and the rate of decrease in viscosity due to the increase in temperature at a temperature higher than 25 ° C is the rate of decrease in viscosity due to the increase in temperature at a temperature lower than 25 ° C. Lower than rate,
The antifouling paint according to any one of Supplementary Note 1 and Supplementary Note 2, wherein
(Appendix 4)
The viscosity characteristic of the oil with respect to the temperature change is a viscosity characteristic that decreases almost monotonically from a viscosity of 14 to 10 mPas to a viscosity of 8 to 4 mPas when the temperature changes from 30 ° C. to 40 ° C., and the resin paint and the oil are impregnated. The weight ratio of the porous material is 10 to 30 parts by weight of the porous material with respect to 100 parts by weight of the resin paint.
The antifouling paint according to any one of Supplementary Note 1 or Supplementary Note 3, wherein
(Appendix 5)
The oil component is a silicone oil in which one type or two or more types are mixed,
5. The antifouling paint according to any one of supplementary notes 1 to 4, characterized in that:
(Appendix 6)
The oil component is a vegetable oil obtained by mixing one type or two or more types,
5. The antifouling paint according to any one of supplementary notes 1 to 4, characterized in that:
(Appendix 7)
The oil is a mixture of silicone oil and vegetable oil.
5. The antifouling paint according to any one of supplementary notes 1 to 4, characterized in that:
(Appendix 8)
The vegetable oil is a dry oil,
The antifouling paint according to any one of Supplementary Note 6 and Supplementary Note 7, wherein
(Appendix 9)
A colorant is further added to the resin paint,
The antifouling paint according to any one of appendices 1 to 8, characterized in that:
(Appendix 10)
A porous material impregnated with an oil having viscosity characteristics for a predetermined temperature change;
An antifouling coating film comprising: a thermoplastic resin paint to which the porous material is added; and an oil film formed by leaching of the oil on the surface of the resin paint.
(Appendix 11)
The porous material is unevenly distributed in the lower layer of the resin paint,
The antifouling coating film according to Supplementary Note 10, wherein
(Appendix 12)
An electronic device equipped with a heating element inside and coated with antifouling paint on the housing surface,
The antifouling paint has a porous material impregnated with an oil having a viscosity characteristic with respect to a predetermined temperature change, and a thermoplastic resin paint to which the porous material is added,
On the antifouling coating film formed by the coating of the antifouling paint, there is an oil film formed by an oil component oozed from the porous material due to a temperature rise by the heating element.
(Appendix 13)
The porous substance in the antifouling coating is unevenly distributed in the lower layer of the resin paint,
The electronic device as set forth in Appendix 12, characterized in that.

100 Zeolite 200 Silicone oil 300 Silicone resin 400 Antifouling paint 410 Antifouling paint film 420 Oil film 500 Notebook PC (non-fouling treatment)
510 Notebook PC (Anti-fouling painted)
511 Housing 512 Heating element 513 Housing coating 600 Spray gun 610 Cup 620 Air

Claims (7)

A porous material impregnated with an oil having viscosity characteristics for a predetermined temperature change;
An antifouling paint comprising: a thermoplastic resin paint to which the porous material is added. The porous material is zeolite;
The antifouling paint according to claim 1. The viscosity characteristic with respect to the temperature change of the oil component decreases with increasing temperature, and the rate of decrease in viscosity due to the increase in temperature at a temperature higher than 25 ° C is the rate of decrease in viscosity due to the increase in temperature at a temperature lower than 25 ° C. Lower than rate,
The antifouling paint according to any one of claims 1 and 2. The oil component is a silicone oil in which one type or two or more types are mixed,
The antifouling paint according to any one of claims 1 to 3, wherein the antifouling paint is provided. The oil component is a vegetable oil obtained by mixing one type or two or more types,
The antifouling paint according to any one of claims 1 to 3, wherein the antifouling paint is provided. An electronic device equipped with a heating element inside and coated with antifouling paint on the housing surface,
The antifouling paint has a porous material impregnated with an oil having a viscosity characteristic with respect to a predetermined temperature change, and a thermoplastic resin paint to which the porous material is added,
On the antifouling coating film formed by the coating of the antifouling paint, there is an oil film formed by an oil component oozed from the porous material due to a temperature rise by the heating element. The porous substance in the antifouling coating is unevenly distributed in the lower layer of the resin paint,
The electronic apparatus according to claim 6.

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