JP5685044B2 - COATING COMPOSITION, COATED PRODUCT USING SAME, AND METHOD FOR FORMING COATING - Google Patents

Description

  The present invention relates to a coating composition, a coated product using the same, and a method for forming a coating film.

  2. Description of the Related Art Conventionally, there has been proposed a coating composition capable of finishing the appearance of a coated object in a metallic style by coating the coating composition on an object to be coated. Such coating compositions include those containing metallic foil or vapor-deposited metallic foil as a bright pigment. These coating compositions are used, for example, as paints or inks for imparting high design properties to a coated object by painting on the object to be coated formed mainly of a plastic material or a metal material, such as the exterior of a mobile phone. It has been.

For example, in Japanese Patent Application Laid-Open No. 2003-82258 (Patent Document 1), the average thickness obtained by grinding aluminum powder in an organic solvent is in the range of 0.025 μm to 0.08 μm, and the average particle diameter ( A coating composition containing an aluminum flake pigment having a D ₅₀ ) in the range of 8 μm to 30 μm is described.

  Japanese Patent Laid-Open No. 2001-104872 (Patent Document 2) describes a metallic material obtained by blending an object to be coated with a fine metal foil having a thickness of 0.08 μm or less and an average particle diameter of 5 to 40 μm. A coating film forming method characterized in that two layers of a base coat and a clear coat are sequentially coated is described. Examples of the fine metal foil include those manufactured by a vapor deposition method, an electroless method, a sputtering method, and the like.

  In JP-A-2006-299200 (Patent Document 3), a scaly metal foil (A) having an average particle diameter measured by a laser diffraction / scattering method of 50 μm or less and a curable resin composition (B) ) As an essential component, the mass ratio of the metal foil (A) and the resin composition (B) is in the range of A: B = 1: 0.01 to 1:10, and the resin The coating material characterized by the initial viscosity in the drying temperature of a composition (B) being 100 Pa.s or less is described. It is described that a vapor-deposited metal foil obtained by pulverizing a metal vapor-deposited film mainly composed of aluminum is preferably used as the scale-like metal foil.

  Japanese Patent Application Laid-Open No. 2005-144338 (Patent Document 4) discloses a method of applying a metallic base paint containing a luster pigment on a surface to be coated, and then applying a clear paint. In addition, a coating method characterized in that it includes vapor-deposited aluminum pieces imparted with leafing properties as a bright pigment is described. The vapor-deposited aluminum piece imparted with leafing properties has a shape and size of 0.01 to 0.2 μm, preferably 0.01 to 0.1 μm, and an aspect ratio of 100 to 300, preferably 150 to 250. In addition, it is described that the dimension in the longitudinal direction is preferably 5 to 20 μm.

  In JP-A No. 2003- 211594 (Patent Document 5), a paint containing a scale-like deposited aluminum foil having a thickness of 1 μm or less is applied to one side of a base material through which light is transmitted, Described is a decorative plate having a metal appearance in a plating style by painting, characterized in that the vapor deposited aluminum foil overlaps in parallel with the base material and becomes a metal appearance in a plating tone when viewed from the non-coating surface side of the base material Yes. As for the vapor-deposited aluminum foil, it is described that aluminum can be vapor-deposited on a resinous film substrate, the aluminum vapor-deposited film is peeled off from the substrate, and the peeled aluminum vapor-deposited film can be used.

  Japanese Unexamined Patent Publication No. 2003-113348 (Patent Document 6) describes a glittering coating composition containing a colored vapor-deposited aluminum flake pigment and a vehicle. In the XY orthogonal coordinate system in which the average particle diameter (μm) of the vapor deposited aluminum flakes is the X axis and the average particle thickness (μm) is the Y axis, A (3.5, 0.01), B (6, 0.01), C (60, 0.1), and D (35, 0.1), it is described that it is preferably adjusted to a range surrounded by a straight line connecting the points.

JP 2003-82258 A JP 2001-104872 A JP 2006-299200 A JP 2005-144338 A Japanese Patent Laid-Open No. 2003-21594 JP 2003-113348 A

  However, as disclosed in Japanese Patent Application Laid-Open No. 2003-82258 (Patent Document 1), when general-purpose aluminum particles are used as the metal foil particles, the finished product has a so-called metallic tone, but a more glossy metallic tone or plating. Does not look like a tone. This is because the surface of the general-purpose aluminum particles has large irregularities compared to the vapor-deposited aluminum particles, so that the light hitting the particle surface is irregularly reflected and the particles appear white or the particles are conspicuous. Conceivable.

  JP 2001-104872 A (Patent Document 2), JP 2006-299200 A (Patent Document 3), JP 2005-144338 A (Patent Document 4), JP 2003-111594 A (Patent Document 5). ), By using vapor deposited aluminum as described in Japanese Patent Application Laid-Open No. 2003-113348 (Patent Document 6), the finished product has a so-called metallic tone or plating tone to some extent. This is presumably because the surface of the vapor-deposited aluminum particles is smoother than the surface of the general-purpose aluminum particles, and therefore the light irregular reflection is small on the particle surface and the particles are not conspicuous. However, with a conventional paint composition, it is possible to impart a certain degree of design such as a metallic tone or a plating tone to a painted material, but a higher design property, that is, higher specularity than the conventional coating composition. Can not give.

  Then, the objective of this invention is providing the coating composition which can obtain the coating material which has a mirror surface property higher than before, the coating material using the same, and the formation method of a coating film.

The inventors of the present invention have made various studies in order to give a coated article a higher specularity than before. As a result, the average particle diameter (D ₅₀ ) and thickness of the fine metal foil used as the fine metal foil in the coating composition were adjusted to values within a predetermined range, and the coating film was made to have a thickness within a predetermined range. It has been found that when the specular glossiness at that time is set to a predetermined value or more, higher specularity can be given to the coated object than ever before.

  The inventors first prepared a coating composition by changing the type of the fine metal foil contained in the coating composition, the thickness of the fine metal foil particles, and the value of the weight part of the aluminum pigment relative to 100 parts by weight of the resin.

(Pigment A)
As a pigment comprising fine metal foil, the average particle diameter _{D 50} of about 25 [mu] m, a thickness with about 0.15 [mu] m, solid content 64% by weight of general-purpose aluminum paste.

(Pigment B)
As a pigment comprising fine metal foil, about 9μm average particle diameter _{D 50,} the thickness is used about 0.4 .mu.m, solid content of 65 wt% of a general-purpose aluminum paste.

(Pigment C)
As a pigment comprising fine metal foil, the average particle diameter _{D 50} of about 10 [mu] m, the thickness was used about 0.05 .mu.m, deposited aluminum foil solids 18 wt%.

(Pigment D)
As a pigment comprising fine metal foil, the average particle diameter _{D 50} is about 11 [mu] m, the thickness was used about 0.04 .mu.m, deposited aluminum foil solid content of 10 wt%.

(Pigment E)
As a pigment comprising fine metal foil, the average particle diameter _{D 50} is about 12 [mu] m, the thickness was used about 0.03 .mu.m, deposited aluminum foil solid content of 10 wt%.

(Pigment F)
As a pigment comprising fine metal foil, the average particle diameter _{D 50} of about 10 [mu] m, the thickness was used about 0.02 [mu] m, deposited aluminum foil solid content of 10 wt%.

  Next, a silicone resin having a solid content of 10% by weight as a resin and the above-described pigments A to F are 50 (resin): 50 (pigment), 40:60, 30:70, 20:80 based on the solid content weight. The mixture was mixed so as to be 10:90, 5:95, or 3:97 and stirred. Furthermore, xylene was added as a solvent and the solid content was adjusted to 0.5% by weight to prepare a coating composition.

  After coating the above-mentioned coating composition on a stainless steel (SUS430) substrate as an object to be coated, it was baked and dried at 180 ° C. for 20 minutes to obtain a coated object. When the present inventors examined about the film thickness of a coating film, favorable adhesiveness was not acquired with the coating film with a film thickness of 2 micrometers or more. Therefore, the coating film was applied by air spray so that the film thickness was about 0.5 μm, about 1.0 μm, and about 1.5 μm. About the obtained coating material, the adhesiveness, glossiness, regular reflectance, emissivity, and heat resistance of the coating film were evaluated.

(Adhesiveness)
Evaluation was made in accordance with JIS K5600-5-6. In case of classification 0 of JIS K5600-5-6, it was judged as acceptable, and in other cases, it was judged as unacceptable.

(Glossiness)
The 20 ° specular gloss was measured according to JIS K5600-4-7. For the measurement, a gloss meter (model number VG-2000) manufactured by Nippon Denshoku Co., Ltd. was used. When the gloss was 300 or more, the test was accepted, and when the gloss was less than 300, the test was rejected.

(Regular reflectance)
The regular reflectance in the visible light region was measured. For the measurement, a spectrocolorimeter (model number CM-3600d) manufactured by Konica Minolta Sensing Co., Ltd. was used. Regarding the specularity and heat-resistant specularity, the specular reflectance was determined to be acceptable when it was 40% or more, and it was rejected when it was less than 40%. About light reflectivity and heat reflectivity, it was set as the pass when the regular reflectance was 50% or more, and was rejected when it was less than 50%.

(Emissivity)
The emissivity in the infrared wavelength region of 3 to 30 μm at 80 ° C. was measured. A D and SAERD emissometer manufactured by Showa Denko KK was used for the measurement. When the emissivity was 0.1 or less, the test was accepted, and when it was greater than 0.1, the test was rejected.

(Solar heat acquisition rate)
The solar heat acquisition rate was calculated by a method prescribed in JIS R3106 based on the emissivity and the solar reflectance. The solar reflectance was measured according to JIS R3106. For the measurement of solar reflectance, a spectrocolorimeter (model number MPC-3100) manufactured by Shimadzu Corporation was used. When the solar heat acquisition rate was less than 0.4, it was accepted, and when it was 0.4 or more, it was rejected.

(Heat-resistant)
After the coated plate was heated at 300 ° C. for 16 hours, the above-mentioned glossiness and regular reflectance were measured. When the values of adhesion, glossiness, and regular reflectance before heating are acceptable, and the glossiness and regular reflectance after heating are 90% or more of the respective values before heating, If it was less than 90%, the test was rejected.

  For the coating composition using the pigment A or the pigment B containing the general-purpose aluminum paste as the fine metal foil, first, in order to examine the overall tendency, the weight ratio of the solid content of the silicone resin and the pigment is 50:50, 30:70. The adhesion of the 10:90 coating composition was evaluated. As a result, it was found that the adhesion evaluation was unsuccessful in all of these coating compositions. Adhesion decreases as the proportion of pigment in the solid content increases. Therefore, among the coating compositions using Pigment A or Pigment B, the coating compositions having a silicone resin / pigment solid content weight ratio of 40:60, 20:80, 5:95, 3:97 are described above. Adhesion, glossiness, regular reflectance, emissivity, solar heat gain, and heat resistance were not evaluated.

  In addition, for coating compositions using Pigment C, Pigment D, and Pigment E, the evaluation of adhesion of the coating composition having a weight ratio of solid content of the silicone resin to the pigment of 5:95 was rejected. The coating composition having a solid weight ratio of 3:97 to the pigment was not evaluated for adhesion, glossiness, specular reflectance, emissivity, solar heat gain, and heat resistance.

  Based on the above evaluation of adhesion, gloss, regular reflectance, emissivity, and heat resistance, the specularity / heat-resistant specularity, low radiation, light reflectivity, and heat reflectivity of the coated material were evaluated.

(Specularity / Heat-resistant specularity A)
The specularity / heat-resistant specularity A was determined to be acceptable when both the above-mentioned adhesion and glossiness were acceptable. When any one of adhesion and glossiness was unacceptable, the specularity / heat-resistant specularity A was regarded as unacceptable. Moreover, about the coated material from which the evaluation of a pass was obtained, the above-mentioned heat resistance evaluation was performed in the maximum film thickness in which the pass evaluation was obtained. Table 1 shows the evaluation of the heat resistance of the specularity / heat-resistant specularity A and the specularity / heat-resistant specularity A.

  In Table 1, all film thicknesses, that is, A is passed if the film thickness is 0.5 to 1.5 μm, B is passed if the film thickness is 0.5 to 1.0 μm, and 0.5 μm film thickness. If it was acceptable, C, all film thicknesses, i.e., D if it was unacceptable with a film thickness of 0.5 to 1.5 μm, and “-” if not measured (not evaluated). Moreover, if it failed in heat resistance, x was entered. The symbols in the table are the same in Tables 2 to 5 described later.

  As shown in Table 1, in the coatings formed using a coating composition containing a general-purpose aluminum paste as a fine metal foil, in all the coatings evaluated, the evaluation of passing specularity / heat-resistant specularity A Was not obtained. On the other hand, in a coating formed using a coating composition containing a vapor-deposited aluminum foil as a fine metal foil, the thickness of the vapor-deposited aluminum foil is 0.02 to 0.05 μm, and the vapor-deposited aluminum foil is 100 parts by weight of the resin. A comparatively good evaluation was obtained when the coating film was formed using a coating composition containing 100 to 900 parts by weight of the coating film and the film thickness of the coating film was 0.5 to 1.5 μm. In addition, when the appearance of the coated material that passed the evaluation of specularity / heat-resistant specularity A was observed, it was confirmed that it had higher specularity than the conventional so-called metallic or metallic tone. It was.

(Low radioactive A)
Low radioactive A was considered acceptable when both the above-mentioned adhesion and emissivity were acceptable. When any one of adhesion and emissivity was unacceptable, it was determined that the low emissivity A was unacceptable. Moreover, about the coated material from which the evaluation of a pass was obtained, the above-mentioned heat resistance evaluation was performed in the maximum film thickness in which the pass evaluation was obtained. Table 1 shows the evaluation of the low radiation A and the heat resistance of the low radiation A. The symbols in the table are the same as in Table 1.

  As shown in Table 2, in the coatings formed using a coating composition containing a general-purpose aluminum paste as a fine metal foil, no pass evaluation was obtained for low radiation in all the coatings evaluated. . On the other hand, in a coated product formed using a coating composition containing a vapor-deposited aluminum foil as a fine metal foil, it was formed using a coating composition containing 100 to 900 parts by weight of the vapor-deposited aluminum foil with respect to 100 parts by weight of the resin. Good evaluations were obtained for all the paints.

(Light reflectivity A)
The light reflectivity A was determined to be acceptable when both the above-described adhesion and regular reflectance were acceptable. When any one of adhesion and regular reflectance was unacceptable, the light reflectivity A was regarded as unacceptable. Moreover, about the coated material from which the evaluation of a pass was obtained, the above-mentioned heat resistance evaluation was performed in the maximum film thickness in which the pass evaluation was obtained. Table 3 shows the evaluation of the light reflectivity A and the heat resistance of the light reflectivity A. The symbols in the table are the same as in Table 1.

  As shown in Table 3, in the coatings formed using a coating composition containing a general-purpose aluminum paste as a fine metal foil, a pass evaluation was obtained for the light reflectivity A in all the coatings evaluated. There wasn't. On the other hand, in the coating formed using a vapor-deposited aluminum foil as the fine metal foil, the thickness of the fine metal foil is 0.02 to 0.04 μm, and the vapor-deposited aluminum foil is 150 to 900 wt. A comparatively good evaluation was obtained when the coating film was formed using a coating composition containing parts, and the film thickness of the coating film was 0.5 to 1.5 μm.

(Thermal reflectivity A)
The heat reflectivity A was considered acceptable when all of the above-mentioned adhesion, regular reflectance, emissivity, and solar heat acquisition rate were acceptable. If any one of adhesion, regular reflectance, emissivity, and solar heat gain was unacceptable, the heat reflectivity A was deemed unacceptable. Moreover, about the coated material from which the evaluation of a pass was obtained, the above-mentioned heat resistance evaluation was performed in the maximum film thickness in which the pass evaluation was obtained. Table 4 shows the evaluation of the heat reflectivity A and the heat resistance of the heat reflectivity A. The symbols in the table are the same as in Table 1.

  As shown in Table 4, in the coatings formed using a coating composition containing a general-purpose aluminum paste as a fine metal foil, a pass evaluation was obtained for heat reflectivity A in all the coatings evaluated. There wasn't. On the other hand, in the coating formed using a vapor-deposited aluminum foil as the fine metal foil, the thickness of the fine metal foil is 0.02 to 0.04 μm, and the vapor-deposited aluminum foil is 150 to 900 wt. A comparatively good evaluation was obtained when the coating film was formed using a coating composition containing parts, and the film thickness of the coating film was 0.5 to 1.5 μm.

  Next, the present inventors examined the influence of the solid content ratio in the coating composition on the performance of the coated product as follows.

  The pigments C to F described above and a silicone resin having a solid content of 10% by weight as a resin were mixed and stirred so that the solid content was 10:90. Further, xylene was added as a solvent, and the solid content was adjusted to 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%, and the coating composition A product was made.

  The obtained coating composition is coated on a stainless steel (SUS430) substrate as an object to be coated, that is, the coating film thickness is about 0.5 μm, about 1.0 μm, or about 1.5 μm. Painted with air spray. After painting, it was baked and dried at 180 ° C. for 20 minutes to obtain a coated product. About the obtained coating, as described above, based on the adhesion, glossiness, specular reflectance, emissivity, and heat resistance of the coating film, specularity / heat resistant specularity A, low emissivity A, light reflectivity A, The heat reflectivity A was evaluated. Moreover, about the coated material from which the evaluation of a pass was obtained, the above-mentioned heat resistance evaluation was performed in the maximum film thickness in which the pass evaluation was obtained.

  Table 5 shows the specularity / heat-resistant specularity A, low-radiation A, light-reflectivity A, and heat-reflectivity A of the coated product, and their heat resistance evaluation. The symbols in the table are the same as in Table 1.

  As shown in Table 5, when the solid content in the coating composition is 0.2 to 1.5% by weight, the film thickness of the coating film is about the specularity / heat-resistant specularity A and the low emissivity. Even if it is 0.5-1.5 micrometers, it was a pass. Further, for the light reflectivity A and the heat reflectivity A, when the solid content in the coating composition is 0.5% by weight, the film thickness of the coating film is any of 0.5 to 1.5 μm. Even passed. When the solid content in the coating composition was 0.2% by weight, the film thickness was 0.5 to 1.0 μm. When the solid content in the coating composition was 1.0 to 1.5% by weight, the film thickness was 0.5 μm. Further, when the solid content in the coating composition was 0.2 to 1.5% by weight, the heat resistance was also acceptable.

  Next, the present inventors examined the influence of the film thickness of the coating film on the performance of the coated object as follows.

As fine metal foil, the average particle diameter _{D 50} of about 10 [mu] m, a thickness with about 0.02 [mu] m, solid content 10% by weight of evaporated aluminum paste. A methylphenyl silicone resin having a solid content of 50% by weight was used as the resin. This vapor-deposited aluminum paste and methylphenyl silicone resin were mixed and stirred so that the solid content weight ratio was 10:90. Furthermore, xylene was added as a solvent, and the coating composition was obtained by adjusting the solid content to 0.5% by weight.

  The above-mentioned coating composition was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray. When the coating composition is applied onto an object to be coated, the coating film thickness, that is, the coating film thickness is about 0.5 μm, about 1.0 μm, about 1.5 μm, about 2.0 μm, about 3.0 μm, about The thickness was set to 4.0 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated product. About the obtained coating material, adhesiveness, glossiness, regular reflectance, and emissivity were evaluated as mentioned above. The obtained evaluation is shown in Table 6. In Table 6, the pass is indicated by ○ and the failure is indicated by ×.

  As shown in Table 6, when the thickness of the coating film of the coated product was 0.5 to 1.5 μm, the adhesiveness, glossiness, regular reflectance, and emissivity were all acceptable. On the other hand, when the thickness of the coating film exceeded 1.5 μm, good evaluation in adhesion, glossiness, and regular reflectance could not be obtained.

  Based on such knowledge of the present inventors, the present invention is configured as follows.

The coating composition according to the present invention includes a vapor-deposited metal foil having an average particle size (D ₅₀ ) of 10 μm or more and 12.5 μm or less and a thickness of 0.02 μm or more and 0.05 μm or less, a resin, and a solvent. The coating film thickness of the coating material formed by coating the coating composition on the object to be coated is 100 μm or more and 900 parts by weight or less of the deposited metal foil with respect to 100 parts by weight of the resin. When the thickness is 5 μm or less, the specular glossiness at 20 ° specular reflection of the coated object is 300 or more, and the regular reflectance in the visible light region is 40% or more.

  By doing in this way, the coating composition which can obtain the coating material which has a mirror surface property higher than before can be provided.

  In the coating composition according to the present invention, the resin is formed of a heat-resistant material, and the coating film formed by coating the coating composition on the object to be coated has a film thickness of 0.5 μm or more. When it is 5 μm or less, it is preferable that the emissivity in the infrared wavelength region of 3 μm or more and 30 μm or less at 80 ° C. is 0.1 or less.

  By doing in this way, the coating composition which can obtain the coating material which has the outstanding low radiation from the past can be provided.

  In the coating composition according to the present invention, the heat-resistant material is preferably a silicone resin or a modified silicone resin.

  By doing in this way, the coating composition which can improve the heat resistance of the coating material painted with the said coating composition more can be provided.

  In the coating composition according to the present invention, the vapor-deposited metal foil has a thickness of 0.02 μm or more and 0.04 μm or less, the vapor-deposited metal foil is contained in 150 to 900 parts by weight with respect to 100 parts by weight of the resin, When the film thickness of the coated film formed by coating the composition on the object to be coated is 0.5 μm or more and 1.5 μm or less, the regular reflectance in the visible light region of the painted object is 50% or more. Preferably there is.

  By doing in this way, the coating composition which has a higher specularity than before and can obtain the coating material which has high light reflectivity can be provided.

  In the coating composition according to the present invention, the vapor-deposited metal foil has a thickness of 0.02 μm or more and 0.04 μm or less, the vapor-deposited metal foil is contained in 150 to 900 parts by weight with respect to 100 parts by weight of the resin, When the film thickness of the coated film formed by coating the composition with the composition is 0.5 μm or more and 1.5 μm or less, the solar heat gain rate of the coated object is 0.4 or less. Is preferred.

  By doing in this way, the coating composition which has a higher specularity than before and can obtain the coating material which has high heat reflectivity can be provided.

  In the coating composition according to the present invention, the vapor-deposited metal foil is preferably a vapor-deposited aluminum foil.

  By doing in this way, the coating composition which can obtain the coating material of what is called a metal-like silver appearance can be provided.

  In the coating composition according to the present invention, the solid content is preferably 0.2% by weight or more and 1.5% by weight or less of the entire coating composition.

  By doing in this way, the coating composition which can improve the mirror surface property and heat resistance of the coating material coated with the said coating composition, and can make an emissivity low can be provided.

  The coated object according to the present invention preferably includes an object to be coated and a coating film formed on the object to be coated by any one of the above-described coating compositions.

  By doing in this way, the coating material which has the higher specularity than before and / or the low radiation which was excellent from the past can be obtained.

  In the coated product according to the present invention, the specular gloss at 20 ° specular reflection measured after heating the coated product at a temperature of 300 ° C. for a predetermined time, the regular reflectance in the visible light region, 3 μm or more and 30 μm or less. Infrared wavelength region emissivity or solar heat acquisition rate is 20 ° specular reflection specular gloss of the coating before heating, regular reflectance in the visible light region, radiation in the infrared wavelength region of 3 μm to 30 μm It is preferable to be configured to be maintained in comparison with the rate or the value of the solar heat acquisition rate.

  By doing in this way, a coated object can be used as a member for which heat resistance is required.

  In the coated object according to the present invention, it is preferable that the object to be coated is a object to be coated for constituting the casing.

  By doing in this way, the coating composition can be applied to the object to be coated, and a housing having a higher specularity than before and / or a lower radiation than before can be easily provided.

  In the coated object according to the present invention, the object to be coated is preferably an object to be coated for constituting at least a part of the outer peripheral surface of the article.

  By doing in this way, the coating composition can be applied to the object to be coated, and an article having a higher specularity than before can be easily provided.

  In the coated object according to the present invention, the object to be coated is preferably an object to be coated for constituting a heat resistant body.

  By doing in this way, the coating composition can be applied to the object to be coated, and a heat-resistant body can be easily provided for use on the outer peripheral surface of a casing or article that requires a higher specularity than before. .

  In the coated object according to the present invention, the object to be coated is preferably an object to be coated for constituting a heat insulating body.

  By doing in this way, the coating composition can be applied to the object to be coated, and it is possible to easily provide a heat insulating body for use on the outer peripheral surface of a casing or article that requires a higher specularity than before. .

  In the coated object according to the present invention, the object to be coated is preferably a object to be coated for constituting a light reflector.

  By doing in this way, the coating composition can be applied to the object to be coated, and a light reflector for use in an environment requiring higher specularity than before can be easily provided.

  In the coated object according to the present invention, the object to be coated is preferably an object to be coated for constituting a heat reflector.

  By doing in this way, the coating composition can be applied to the object to be coated, and a heat reflector for use in an environment that requires higher specularity than before can be easily provided.

  In the method of forming a coating film according to the present invention, a coating film is formed by coating any of the above-described coating compositions on an object to be coated, and a clear coating is applied on the coating film to form a top clear coating. It is preferable to form a film.

  By doing in this way, the coated material which has higher specularity than before can be provided.

  As described above, according to the present invention, it is possible to provide a coating composition capable of obtaining a coated article having higher specularity than before, a coated article using the same, and a method for forming a coating film. .

A coating composition according to one embodiment of the present invention includes an evaporated metal foil having an average particle diameter (D ₅₀ ) of 10 μm or more and 12.5 μm or less and a thickness of 0.02 μm or more and 0.05 μm or less, a resin, a solvent, The coating film thickness of the coated product formed by coating the coating composition on the object to be coated is 0.5 μm, including 100 parts by weight or more and 900 parts by weight or less of the deposited metal foil with respect to 100 parts by weight of the resin. When the thickness is 1.5 μm or less, the specular glossiness at 20 ° specular reflection of the coated object is 300 or more and the regular reflectance in the visible light region is 40% or more.

  By doing in this way, the coating composition which can obtain the coating material which has a mirror surface property higher than before can be provided.

  For example, a vapor-deposited aluminum foil is used as the vapor-deposited metal foil. By using the vapor-deposited aluminum foil, it is possible to provide a coating composition capable of obtaining a so-called metallic-tone silver appearance.

  The resin is not particularly limited, and for example, a resin such as a silicone resin, an acrylic resin, an acrylic-epoxy resin, and an acrylic-urethane resin can be used.

  The solvent is not particularly limited as long as it can disperse the resin and the vapor-deposited metal foil. For example, water or an organic solvent such as xylene may be used.

  In the coating composition according to one embodiment of the present invention, the resin is formed of a heat-resistant material, and the thickness of the coating film formed by coating the coating composition on the object to be coated is 0.5 μm. When the thickness is 1.0 μm or less, the emissivity in the infrared wavelength region of 3 μm or more and 30 μm or less at 80 ° C. is preferably 0.1 or less. By doing in this way, the coating composition which can obtain the coating material which has the outstanding low radiation from the past can be provided.

  In the coating composition of one embodiment of the present invention, the resin heat-resistant material is more preferably a silicone resin or a modified silicone resin. Silicone resin-based resins and modified silicone resins have high heat resistance. Then, by doing in this way, the coating composition which can improve the heat resistance of the coating material painted with the said coating composition more can be provided.

  In the coating composition according to the present invention, the vapor-deposited metal foil has a thickness of 0.02 μm or more and 0.04 μm or less, the vapor-deposited metal foil is contained in 150 to 900 parts by weight with respect to 100 parts by weight of the resin, When the film thickness of the coated film formed by coating the composition on the object to be coated is 0.5 μm or more and 1.5 μm or less, the regular reflectance in the visible light region of the painted object is 50% or more. Preferably there is. By doing in this way, the coating composition which can obtain the coating material which has the higher specularity than before and the low radiation which was excellent from the past, and also has high light reflectivity can be provided. .

  In the coating composition according to the present invention, the vapor-deposited metal foil has a thickness of 0.02 μm or more and 0.04 μm or less, the vapor-deposited metal foil is contained in 150 to 900 parts by weight with respect to 100 parts by weight of the resin, When the film thickness of the coated film formed by coating the composition with the composition is 0.5 μm or more and 1.5 μm or less, the solar heat gain rate of the coated object is 0.4 or less. Is preferred. By doing in this way, the coating composition which can obtain the coating material which has the higher specularity than before, the low radiation which was excellent from the past, and also has high heat reflectivity can be provided. .

  In the coating composition according to one embodiment of the present invention, the solid content is preferably 0.2% by weight or more and 1.5% by weight or less of the entire coating composition. By doing in this way, the coating composition which can improve the mirror surface property and heat resistance of the coating material coated with the said coating composition, and can make an emissivity low can be provided.

  In the coating composition of another embodiment of the present invention, the solid content is preferably 0.2% by weight or more and 0.5% by weight or less of the entire coating composition. By doing in this way, the coating composition which can improve the light reflectivity and heat reflectivity of the coating material painted with the said coating composition can be provided.

  The coated object of one embodiment of the present invention preferably includes an object to be coated and a coating film formed on the object to be coated by any one of the above-described coating compositions.

  By doing in this way, the coating material which has higher specularity than before and / or low radiation which is superior than before can be provided.

  In the coated object according to one embodiment of the present invention, the coating film preferably has a thickness of 0.5 μm or more and 1.5 μm or less. By doing in this way, the specular glossiness in 20 degree specular reflection of a coating can be made 300 or more.

  In the coated object of one embodiment of this invention, it is preferable that the specular glossiness in 20 degree specular reflection of the said coated object is 300 or more. By doing in this way, the coated material which has higher specularity than before can be provided.

  In the painted object of one embodiment of this invention, it is preferable that the regular reflectance in the visible light area | region of the said coated object is 40% or more. By doing in this way, the coated material which has higher specularity can be provided. Moreover, the coated material which has higher heat resistance can be provided.

  In the coated object of one embodiment of this invention, it is preferable that the emissivity in the infrared wavelength region of 3 μm to 30 μm at 80 ° C. of the coated object is 0.1 or less. By doing in this way, the emissivity of a paint can be made low and the heat reflectivity of a paint can be improved.

  In the painted object of one embodiment of this invention, it is preferable that the regular reflectance in the visible light region of the painted object is 50% or more. By doing in this way, the light reflectivity and heat reflectivity of a coating can be improved.

  In the coated object of one embodiment of this invention, it is preferable that the solar heat acquisition rate of the coated object is 0.4 or less. By doing in this way, the heat reflectivity of a coating thing can be improved.

  In the coated product according to one embodiment of the present invention, the specular gloss at 20 ° specular reflection, the regular reflectance in the visible light region, 3 μm or more, measured after heating the coated product at a temperature of 300 ° C. for a predetermined time. The emissivity in the infrared wavelength region of 30 μm or less, or the solar heat acquisition rate is the specular gloss in the 20 ° specular reflection of the coating before heating, the regular reflectance in the visible light region, the infrared wavelength of 3 μm or more and 30 μm or less It is preferable to be configured to be maintained in comparison with the value of the area emissivity or solar heat gain rate. By doing in this way, a coated object can be used as a member for which heat resistance is required.

  For example, when the above-mentioned specular gloss and regular reflectance before heating are maintained at 90% or more after heating, it can be said that they are maintained equal, that is, maintained.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting a casing.

  For example, a housing of an automobile or a household electrical product is an example of the housing. A high design property may be required for a housing of an automobile or a household electrical product.

  Thus, by doing so, a coating composition can be applied to the object to be coated, and a casing having a higher mirror surface than before can be easily provided.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting at least a part of the outer peripheral surface of the article.

  For example, a part that constitutes at least a part of the outer peripheral surface of an automobile or household electrical product is an example of an article that requires high designability.

  By doing in this way, the coating composition can be applied to the object to be coated, and an article having a higher specularity than before can be easily provided.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting a heat resistant body.

  In the present specification, an object that requires heat resistance is referred to as a heat resistant body. The heat-resistant body is used in an environment that requires heat resistance. For example, a part constituting an automobile is an example of a heat-resistant body that requires heat resistance. In addition, mufflers for two wheels, mufflers for four wheels, cylinder blocks, exteriors of articles that require high design, exteriors of cookers, substitutes for stainless steel around kitchens, exteriors of household electrical appliances, heating appliance parts Etc. are an example of a heat-resistant body.

  By doing in this way, the coating composition can be applied to the object to be coated, and a heat-resistant body can be easily provided for use on the outer peripheral surface of a casing or article that requires a higher specularity than before. . Moreover, since a coating film can be formed easily compared with the conventional vacuum evaporation method and the plating method, the cost concerning manufacture of a heat resistant body can be reduced.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting a heat insulating body.

  In the specification of the present application, an object requiring heat insulating properties is referred to as a heat insulating material. The heat insulating body is used in an environment that requires heat insulating properties. For example, a heat retaining bottle is an example of a heat insulating body that requires heat insulating properties. In addition, a small device that cannot use a heat insulating material, for example, an alternative member of stainless steel for a heat retaining bottle, a component member of a boiler, a member constituting an inner surface of a hot water tank or the like is an example of a heat insulating body.

  By doing in this way, the coating composition can be applied to the object to be coated, and it is possible to easily provide a heat insulating body for use on the outer peripheral surface of a casing or article that requires a higher specularity than before. . Moreover, since a coating film can be easily formed compared with the conventional vacuum evaporation method and the plating method, the energy saving required when manufacturing or using a heat insulating body can be enabled. Furthermore, since a heat insulating effect can be realized by a thin coating film of about 1 μm, the heat insulating body can be made compact.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting a light reflector.

  In the present specification, an object that requires light reflectivity is a light reflector. Light reflectors are used in environments that require light reflectivity. For example, a light reflecting plate or a half mirror is an example of a light reflector that requires high light reflectivity. In addition, backlights for automobiles, etc. where aluminum vapor deposition film substitutes are used, downlights, accessory parts such as light emitting diodes (LEDs) used for illumination, and other light reflectors used as light reflectors are light reflectors. It is an example.

  By doing in this way, the coating composition can be applied to the object to be coated, and a light reflector for use in an environment requiring higher specularity than before can be easily provided. In addition, the coating film can be easily formed compared to the conventional vacuum deposition method and plating method, enabling energy saving and cost reduction when manufacturing or using a light reflector, and light reflection efficiency. Can be increased.

  In the coated object according to one embodiment of the present invention, the object to be coated is preferably an object to be coated for constituting a heat reflector.

  In the present specification, an object that requires heat reflectivity is referred to as a heat reflector. Heat reflectors are used in environments that require heat reflectivity. For example, the casing and components of a heater and the casing and components of a heater are examples of heat reflectors that require high heat reflectivity. In addition, a reflector such as an oil stove, a heat-shielding building material, and a member disposed in a cooker range or a grill to reflect heat are examples of a heat reflector.

  By doing in this way, the coating composition can be applied to the object to be coated, and a heat reflector for use in an environment that requires higher specularity than before can be easily provided. In addition, the coating film can be easily formed compared to the conventional vacuum deposition method and plating method, enabling energy saving and cost reduction required for manufacturing or using a heat reflector, and efficiency of heat reflection. Can be increased.

  According to one embodiment of the present invention, there is provided a method for forming a coating film, wherein a coating film is formed by coating any of the above-described coating compositions on an object to be coated, and a clear coating is applied on the coating film. It is preferable to form a clear coating film.

  As the object to be coated, for example, stainless steel, an aluminum base material or the like is used.

  Any one of the coating compositions described above is produced by mixing and stirring the vapor-deposited metal foil and the resin, and adjusting to a predetermined solid content using a solvent. The coating composition is applied to an object by a known coating method, for example, air spray.

  The clear paint used for the top coat is not particularly limited, and for example, a resin such as methylphenyl silicone resin is used.

  By applying one of the above coating compositions to form a coating film, and then applying a clear coating on the coating film to form a top clear coating film, a coated product having higher specularity than before is provided. be able to.

  As an effect of the coating composition and the coated product of the present invention, it was confirmed as follows that the mirror composition had a higher specularity than before. Furthermore, it was confirmed whether or not it has other functions such as low radiation, heat-resistant specularity, light reflectivity, and heat reflectivity.

(Glittering paint A)
As fine metal foil, the average particle diameter _{D 50} of about 10 [mu] m, a thickness with about 0.02 [mu] m, solid content 10% by weight of evaporated aluminum paste. A methylphenyl silicone resin having a solid content of 50% by weight was used as the resin. This vapor-deposited aluminum paste and methylphenyl silicone resin were mixed and stirred so that the solid content weight ratio was 10 (resin): 90 (vapor-deposited aluminum). Further, xylene was added as a solvent, and the solid content was adjusted to 0.5% by weight. The obtained coating composition was designated as glitter coating A.

(Bright paint B)
As fine metal foil, as with bright paint A, the average particle diameter _{D 50} 10 [mu] m is approximately, a thickness with 0.02 [mu] m to about, 10 weight% solids of evaporated aluminum paste. As the resin, a solventless acrylic resin having a solid content of 100% by weight was used. The vapor-deposited aluminum paste and the solventless acrylic resin were mixed and stirred so that the solid content weight ratio was 10 (resin): 90 (vapor-deposited aluminum). Further, xylene was added as a solvent, and the solid content was adjusted to 0.5% by weight. The resulting coating composition was designated as glitter paint B.

(Bright paint C)
As fine metal foil, the average particle diameter _{D 50} is about 11 [mu] m, a thickness with about 0.04 .mu.m, solid content 10% by weight of the water-based paint deposited aluminum paste. An acrylic-urethane composite emulsion having a solid content of 45% by weight was used as the resin. The vapor-deposited aluminum paste for water-based paint and the acrylic-urethane composite emulsion were mixed and stirred so that the solid content weight ratio was 10 (resin): 90 (vapor-deposited aluminum). Furthermore, water was added as a solvent to adjust the solid content to 0.5% by weight. The obtained paint composition was designated as glitter paint C.

(Glittering paint D)
As fine metal foil, the average particle diameter _{D 50} of about 25 [mu] m, a thickness with about 0.15 [mu] m, solid content 64% by weight of general-purpose aluminum paste. As the resin, a methylphenyl silicone resin having a solid content of 50% by weight was used in the same manner as the glittering paint A. This general-purpose aluminum paste and methylphenyl silicone resin were mixed and stirred so that the solid content weight ratio was 10 (resin): 90 (general-purpose aluminum). Further, xylene was added as a solvent, and the solid content was adjusted to 0.5% by weight. The resulting paint composition was designated as glitter paint D.

(Glittering paint E)
As fine metal foil, about 9μm average particle diameter _{D 50,} the thickness is used about 0.4 .mu.m, solid content of 65 wt% of a general-purpose aluminum paste. As the resin, a methylphenyl silicone resin having a solid content of 50% by weight was used in the same manner as the glittering paint A. This general-purpose aluminum paste and methylphenyl silicone resin were mixed and stirred so that the solid content weight ratio was 10 (resin): 90 (general-purpose aluminum). Further, xylene was added as a solvent, and the solid content was adjusted to 0.5% by weight. The resulting coating composition was designated as glitter paint E.

  The above-described glittering paints A to F were applied to an object to be coated to prepare a coated object.

(Example 1)
The above-described glitter paint A was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate A as a coated product.

(Example 2)
A degreased aluminum plate was used as a substrate. As a primer for the glitter coating film, a black paint formed of a polyester-modified silicone resin was applied on the substrate so that the coating film thickness was about 15 μm. Thereafter, it was cured by heating at 180 ° C. for 20 minutes. The obtained base material was used as an object to be coated, and the above-described glitter paint A was further applied onto the object by air spray so that the paint film thickness of the glitter paint A was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate B as a coated product.

Example 3
The above-mentioned glitter paint A was coated on the glass plate as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate C as a coated product. The difference between the coated plate C of Example 3 and the coated plate A of Example 1 is that a glass plate is used as the plate to be coated.

Example 4
In the same manner as in Example 1, the above-mentioned glitter paint A is applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness is about 1 μm. did. After coating, the coated plate A was obtained by heat curing at 180 ° C. for 20 minutes. Further, a methylphenyl silicone resin having a solid content of 50% by weight was applied as a clear coating for the top coat so that the coating thickness of the clear coating was about 5 μm. Then, it heat-cured for 20 minutes at 180 degreeC, and the coating board D was obtained as a coating thing.

(Example 5)
The above-mentioned glitter paint B was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate E as a coated product.

(Example 6)
The above-mentioned glitter paint C was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate F as a coated product.

(Comparative Example 1)
The above-mentioned glitter paint D was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate G as a coated product.

(Comparative Example 2)
The above-mentioned glitter paint E was applied to a stainless steel plate (SUS430) subjected to degreasing treatment as an object to be coated by air spray so that the coating film thickness, that is, the coating film thickness was about 1 μm. After coating, it was cured by heating at 180 ° C. for 20 minutes to obtain a coated plate H as a coated product.

  Table 7 shows the configurations of the coated plates A to F of Examples 1 to 6 and the coated plates G to H of Comparative Examples 1 and 2.

(Performance evaluation test)
The specularity, heat-resistant specularity, low radiation, light reflectivity, and heat reflectivity of the coated plates A to G obtained in Examples 1 to 6 and Comparative Examples 1 to 2 were evaluated. In order to evaluate these performances, first, for each coated plate, adhesion, gloss, regular reflectance 1, regular reflectance 2, emissivity, solar heat acquisition rate, heat resistance 1 and heat resistance 2 Was evaluated as follows.

(Adhesiveness)
Evaluation was made in accordance with JIS K5600-5-6. In case of classification 0 of JIS K5600-5-6, it was judged as acceptable, and in other cases, it was judged as unacceptable.

  In the coated plates A to F of Examples 1 to 6, the classification was 0. The coated plate G of Comparative Example 1 and the coated plate H of Comparative Example 2 were classified as 5.

(Glossiness)
The 20 ° specular gloss was measured according to JIS K5600-4-7. For the measurement, a gloss meter (model number VG-2000) manufactured by Nippon Denshoku Co., Ltd. was used. When the gloss was 300 or more, the test was accepted, and when the gloss was less than 300, the test was rejected.

  The glossiness of the coated plate A of Example 1 was greater than the gloss of 1000. The glossiness of the coated plate B of Example 2 was gloss 698. The glossiness of the coated plate C of Example 3 was gloss 348. The glossiness of the coated plate D of Example 4 was gloss 338. The glossiness of the coated plate E of Example 5 was gloss 559. The glossiness of the coated plate F of Example 6 was gloss 463. The glossiness of the coated plate G of Comparative Example 1 was gloss 393. The glossiness of the coated plate H of Comparative Example 2 was gloss 515.

(Regular reflectance 1)
The regular reflectance in the visible light region was measured. For the measurement, a spectrocolorimeter (model number CM-3600d) manufactured by Konica Minolta Sensing Co., Ltd. was used. When the regular reflectance was 40% or more, it was judged as acceptable, and when it was less than 40%, it was judged as unacceptable.

  The regular reflectance of the coated plate A of Example 1 was 63. The regular reflectance of the coated plate B of Example 2 was 43. The regular reflectance of the coated plate C of Example 3 was 50. The regular reflectance of the coated plate D of Example 4 was 40. The regular reflectance of the coated plate E of Example 5 was 55. The regular reflectance of the coated plate F of Example 6 was 42. The regular reflectance of the coated plate G of Comparative Example 1 was 31. The regular reflectance of the coated plate H of Comparative Example 2 was 37.

(Regular reflectance 2)
Similar to the measurement of regular reflectance 1, the regular reflectance in the visible light region was measured. When the regular reflectance was 50% or more, it was judged as acceptable, and when it was less than 50%, it was judged as unacceptable.

(Emissivity)
The emissivity in the infrared wavelength region of 3 to 30 μm at 80 ° C. was measured. A D and SAERD emissometer manufactured by Showa Denko KK was used for the measurement. When the emissivity was 0.1 or less, the test was accepted, and when it was greater than 0.1, the test was rejected.

  The emissivity of the coated plate A of Example 1 was 0.06. The emissivity of the coated plate B of Example 2 was 0.10. The emissivity of the coated plate C of Example 3 was 0.07. The emissivity of the coated plate D of Example 4 was 0.65. The emissivity of the coated plate E of Example 5 was 0.07. The emissivity of the coated plate F of Example 6 was 0.08. The emissivity of the coated plate G of Comparative Example 1 was 0.18. The emissivity of the coated plate H of Comparative Example 2 was 0.12.

(Solar heat acquisition rate)
Based on the emissivity and solar reflectance, it was calculated by the method prescribed in JIS R3106. The solar reflectance was measured according to JIS R3106. For the measurement of solar reflectance, a spectrocolorimeter (model number MPC-3100) manufactured by Shimadzu Corporation was used. When the solar heat acquisition rate was less than 0.4, it was accepted, and when it was 0.4 or more, it was rejected. About the coating board B of Example 2, and the coating board D of Example 4, since the pass evaluation was not obtained about the regular reflectance and emissivity, the solar heat acquisition rate was not evaluated.

  The solar heat acquisition rate of the coated plate A of Example 1 was 0.26. The solar heat acquisition rate of the coated plate C of Example 3 was 0.19. The solar heat acquisition rate of the coated plate E of Example 5 was 0.24. The solar heat acquisition rate of the coated plate F of Example 6 was 0.24. The solar heat acquisition rate of the coated plate G of Comparative Example 1 was 0.21. The solar heat acquisition rate of the coated plate H of Comparative Example 2 was 0.24.

(Heat resistance 1)
After the coated plate was heated at 300 ° C. for a predetermined time of 16 hours, the above-mentioned adhesion, glossiness, regular reflectance, and emissivity were measured. When the values of adhesion, glossiness, and regular reflectance before heating are acceptable, and the glossiness and regular reflectance after heating are 90% or more of the respective values before heating, If it was less than 90%, the test was rejected.

(Heat resistance 2)
After the coated plate was heated at 300 ° C. for a predetermined time of 16 hours, the above-mentioned adhesion and emissivity were measured. About the adhesiveness and emissivity of the coating board after a heating, it was judged whether it was a pass or a rejection by the standard similar to the adhesiveness and emissivity before a heating.

  The heat resistance was not evaluated for the coated plates E and F of Example 5 and Example 6 that did not use a resin having heat resistance.

  Table 8 shows the adhesion, glossiness, regular reflectance, emissivity, solar heat acquisition rate, and adhesion, glossiness, regular reflectance, and emissivity after heating of each coated plate.

  Based on the test results shown in Table 8, the specularity, heat-resistant specularity, low radiation, light reflectivity, and heat reflection of the paint plates A to F of Examples 1 to 6 and the paint plates G to H of Comparative Examples 1 and 2 are shown. Sex was evaluated.

(Specularity)
The specularity was determined to be acceptable when all of the above-described adhesion, glossiness, and regular reflectance 1 were acceptable. When any one of adhesion, glossiness, and regular reflectance 1 was unacceptable, the specularity was regarded as unacceptable. Table 9 shows the specularity evaluation. In Table 9, the pass is indicated by ○ and the failure is indicated by ×.

  As shown in Table 9, with respect to the specularity, the coated plates A to F of Examples 1 to 6 were acceptable, and the coated plates G to H of Comparative Examples 1 to 2 were unacceptable.

(Heat resistant specularity)
The heat resistance specularity was determined to be acceptable when the above-mentioned adhesion, glossiness, regular reflectance 1, and heat resistance 1 were all acceptable. When any one of adhesion, glossiness, regular reflectance 1, and heat resistance 1 was unacceptable, the heat resistant mirror surface property was regarded as unacceptable. In addition, in the evaluation of heat resistance 1 for evaluating the heat-resistant specularity, the standard of regular reflectance 1 was used as the standard for pass / fail of the regular reflectance. Table 10 shows the evaluation of the heat-resistant specularity. In Table 10, the acceptance is indicated by ◯ and the rejection is indicated by ×.

  As shown in Table 10, about heat-resistant mirror surface property, the coating plates AD of Examples 1-4 were acceptable, and the coating plates G-H of Comparative Examples 1-2 were unacceptable.

(Low radiation)
Low radioactivity was considered acceptable when all of the above-mentioned adhesion, emissivity, and heat resistance 2 were acceptable. When any one of adhesion, emissivity, and heat resistance 2 was rejected, the low radiation was determined to be unacceptable. Table 11 shows the evaluation for low radiation. In Table 11, the pass is indicated by ○ and the failure is indicated by ×.

  As shown in Table 11, for low radiation, the painted plate A of Example 1, the painted plate B of Example 2 and the painted plate C of Example 3 are acceptable, and the painted plate D of Example 4 is unacceptable, compared. The coated plates G to H of Examples 1 and 2 were unacceptable.

(Light reflectivity)
The light reflectivity was determined to be acceptable when all of the above-described adhesion, glossiness, and regular reflectance 2 were acceptable. When any one of adhesion, glossiness, and regular reflectance 2 was unacceptable, the light reflectivity was regarded as unacceptable. Table 12 shows the evaluation of light reflectivity. In Table 12, the acceptance is indicated by ◯ and the rejection is indicated by ×.

  As shown in Table 12, with respect to the light reflectivity, the coating plate A of Example 1 and the coating plate E of Example 5 passed, the coating plate B of Example 2, the coating plate D of Example 4, and the Example 5 The coating plate E of Example 6, the coating plate F of Example 6, and the coating plates G to H of Comparative Examples 1 and 2 were unacceptable.

(Heat reflectivity)
The heat reflectivity was determined to be acceptable when all of the above-described adhesion, glossiness, regular reflectance 2, emissivity, solar heat acquisition rate, heat resistance 1 and heat resistance 2 were acceptable. If any one of adhesion, glossiness, regular reflectance 2, emissivity, solar heat acquisition rate, heat resistance 1 and heat resistance 2 is rejected, the heat reflectivity is rejected. did. In the evaluation of heat resistance 1 for evaluating heat reflectivity, the standard of regular reflectance 2 was used as the standard for pass / fail of regular reflectance. Table 13 shows the evaluation of heat reflectivity. In Table 13, the pass is indicated by ○ and the failure is indicated by ×.

  As shown in Table 13, with regard to heat reflectivity, the coated plate A of Example 1, the coated plate C of Example 3, the painted plate E of Example 5, and the painted plate F of Example 6 passed, Example 2. The coating plate B of Example 4, the coating plate D of Example 4, the coating plate E of Example 5, and the coating plates G to H of Comparative Examples 1 and 2 failed.

  Table 14 summarizes the evaluation of specularity, heat-resistant specularity, low radiation, light reflectivity, and heat reflectivity.

  As shown in Table 14, it was found that the coated plates A to F of Examples 1 to 6 of the present invention have high specularity as compared with at least the coated plates G to H of Comparative Examples 1 and 2. . In addition, it is assumed that the higher the value of the glossiness and the regular reflectance 1, the higher the specularity. In the coating plate A to the coating plate F of Examples 1 to 6, the mirror surface property is the highest in the coating plate A of Example 1, and then the coating plate E of Example 5 and the coating plate B of Example 2 are carried out. It can be said that the coated plate F of Example 6 and the coated plate C of Example 3 have high specularity, and among these coated plates, the coated plate D of Example 4 has the lowest specularity.

  Furthermore, it turned out that the coating plates AD of Examples 1-4 of this invention have several performances among specularity, heat-resistant specularity, low radiation property, light reflectivity, and heat reflectivity. In particular, in the coated plate A of Example 1, a pass evaluation was obtained for all the performances of specularity, heat-resistant specularity, low radiation, light reflectivity, and heat reflectivity. On the other hand, the coated plate G of Comparative Example 1 and the coated plate H of Comparative Example 2 did not have any performance among specularity, heat-resistant specularity, low radiation, light reflectivity, and heat reflectivity.

  As described above, according to the present invention, it is possible to provide a coating composition capable of obtaining a coated product having higher specularity than before, a coated product using the same, and a method for forming a coating film. all right.

  In addition, it was found that a coated product having good adhesion, high glossiness, and excellent low radiation can be obtained even when a glass plate is used as an object to be coated, such as the coated plate C of Example 3. It was. Furthermore, since it has a mirror-like appearance when viewed from the surface to be coated, it can be applied to a mirror or the like. Moreover, a coated object can be used also for a half mirror etc. by making a to-be-coated object into a glass plate.

  It should be considered that the embodiments and examples disclosed above are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments and examples but by the scope of the claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of the claims.

Claims (16)

A vapor-deposited metal foil having an average particle diameter (D ₅₀ ) of 10 μm or more and 12.5 μm or less and a thickness of 0.02 μm or more and 0.05 μm or less;
Resin,
A solvent,
Including 100 parts by weight or more and 900 parts by weight or less of the deposited metal foil with respect to 100 parts by weight of the resin;
When the thickness of the coating film formed by coating the coating composition on the object to be coated is 0.5 μm or more and 1.5 μm or less, the mirror glossiness at 20 ° specular reflection of the coated object is A coating composition having 300 or more and a regular reflectance in the visible light region of 40% or more. The resin is formed of a heat resistant material,
In the case where the coating film formed by coating the coating composition on the object to be coated has a film thickness of 0.5 μm or more and 1.5 μm or less, the infrared rays of 3 μm or more and 30 μm or less of the coated material at 80 ° C. The coating composition of Claim 1 whose emissivity of a wavelength range is 0.1 or less.   The coating composition according to claim 2, wherein the heat-resistant material is a silicone resin or a modified silicone resin. The thickness of the deposited metal foil is 0.02 μm or more and 0.04 μm or less,
Containing 150 parts by weight or more and 900 parts by weight or less of the vapor-deposited metal foil with respect to 100 parts by weight of the resin;
When the thickness of the coating film formed by coating the coating composition on the object to be coated is 0.5 μm or more and 1.5 μm or less, the regular reflectance in the visible light region of the painted object is 50. The coating composition according to any one of claims 1 to 3, which is at least%. The thickness of the deposited metal foil is 0.02 μm or more and 0.04 μm or less,
The resin is formed of a heat resistant material,
Containing 150 parts by weight or more and 900 parts by weight or less of the vapor-deposited metal foil with respect to 100 parts by weight of the resin;
When the film thickness of the coating film formed by coating the coating composition on the object to be coated is 0.5 μm or more and 1.5 μm or less, the solar heat gain rate of the coating object is 0.4 or less. The coating composition according to any one of claims 1 to 4, wherein   The coating composition according to any one of claims 1 to 5, wherein the deposited metal foil is a deposited aluminum foil.   The coating composition according to any one of claims 1 to 6, wherein the solid content is 0.2 wt% or more and 1.5 wt% or less of the entire coating composition. To be painted,
A coated article comprising: a coating film formed on the article to be coated with the coating composition according to any one of claims 1 to 7.   Specular gloss at 20 ° specular reflection, specular reflectance in visible light region, emissivity in infrared wavelength region of 3 μm or more and 30 μm or less, or solar radiation measured after heating the coated object at a temperature of 300 ° C. for a predetermined time. The heat acquisition rate is the degree of specular gloss in the 20 ° specular reflection of the coated object before heating, the regular reflectance in the visible light region, the emissivity in the infrared wavelength region of 3 μm or more and 30 μm or less, or the solar heat acquisition rate. The coated article according to claim 8, which is configured to be maintained in comparison with the value.   The painted object according to claim 8 or 9, wherein the painted object is a coated object for constituting a casing.   The coated object according to any one of claims 9 to 10, wherein the coated object is a coated object for constituting at least a part of an outer peripheral surface of an article.   The coated article according to any one of claims 8 to 11, wherein the article to be coated is a article to be coated for constituting a heat resistant body.   The coated object according to any one of claims 8 to 12, wherein the coated object is a coated object for constituting a heat insulating body.   The coated object according to any one of claims 8 to 13, wherein the coated object is a coated object for constituting a light reflector.   The coated object according to any one of claims 8 to 14, wherein the coated object is a coated object for constituting a heat reflector.   A coating composition is formed by coating the coating composition according to any one of claims 1 to 7 on an object to be coated, and a top clear coating film is formed by coating a clear coating on the coating film. A method for forming a coating film.