JP6937588B2 - How to form a coating film and coating film and coated material - Google Patents

Description

The present invention relates to a method for forming a coating film and a coating film and a coated material, which can bring out a high-class feeling by giving a three-dimensional effect having a transparent feeling and depth and depth on the surface of the base material.

Conventionally, as a coating method for improving the design of the surface of a base material, a method of coating and molding a base layer, a pattern layer and a clear layer on the surface of the base material in order is generally known.
In addition, as a coating method for giving a high-class feeling to the base material, a piano coating that gives depth and luster to the color by forming a multi-layer coating film, or a clear coating film is formed on a coating film containing a bright material. However, metallic painting that gives a metallic brilliance and luster is performed.

Further, in Patent Document 1 below, a first bright base coating film containing a vapor-deposited metal flake pigment on the surface of a base material, a first clear coating film, and a second bright base coating film containing a metal-plated glass flake pigment. A method for forming a brilliant coating film that exhibits a "textured brilliant feeling" by a film and a four-layer coating film in which a second clear coating film is sequentially formed is disclosed.

Japanese Unexamined Patent Publication No. 2006-297183

In the prior art described in Patent Document 1, the metallic feeling (reflectiveness) of the first brilliant base coating film, the grainy feeling (luminance feeling) of the second brilliant base coating film, and the brilliant feeling due to the first clear coating film. It is said that the depth of the film is emphasized to enhance the texture, and that the entire four-layer coating film gives a "textured brilliance". There were problems such as.
In addition, since the coating process employs a 4-coat 2-bake method, there are problems such as an increase in the appearance defect rate due to each coating process and an increase in cost due to an increase in manufacturing time.

The present invention has been made in view of the above-mentioned conventional problems, and a coating film capable of creating a high-class feeling by giving a transparent and deep and deep three-dimensional effect is coated with 3 coats and 1 bake. It is an object of the present invention to provide a method of forming the coating film and a coating material.

The present invention has the following configuration as a means for solving the above problems.
(1) The method for forming a coating film according to the present invention includes a first bright coating film containing a first bright pigment, a second bright coating film containing a second bright pigment, and a clear coating. In a method for forming a coating film in which a film and a film are sequentially laminated on the surface of a substrate, the first bright coating film contains the first bright pigment in the solid content of the coating film in an amount of 0.01 to 5% by mass. The second brilliant coating film is a coating film containing 0.01 to 5% by mass of the second brilliant pigment in the solid content of the coating film, and is the coating film of the first brilliant pigment. The average particle size of the second bright pigment is made relatively large with respect to the average particle size, and a light diffusing agent having an average particle size of 1 to 10 μm is applied to the first bright coating film as a coating film solid content. It is characterized in that it contains 0.05 to 11% by mass.
(2) In the method for forming a coating film according to the present invention, the dry film thickness of the first bright coating film can be 5 to 50 μm, and the dry film thickness of the second bright coating film can be 5 to 50 μm. ..
(3) In the method for forming a coating film according to the present invention, the first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass. It is preferable that the second bright coating film is a coating film containing the second bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass.

(4) The coating film according to the present invention contains a first bright coating film containing a first bright pigment and a second bright pigment formed on the first bright coating film. A second bright coating film and a clear coating film formed on the second bright coating film are provided, and the first bright coating film contains the first bright coating film in the coating film solid content. The second bright coating film contains 0.01 to 5% by mass of the second bright pigment in the solid content of the coating film. , with respect to the average particle diameter of the first bright pigment, the average particle diameter of the second bright pigment is relatively large, the the first bright coating film, the average particle size of 1~10μm The light diffusing agent is contained in the solid content of the coating film in an amount of 0.05 to 11% by mass.
(5) In the coating film of the present invention, the dry film thickness of the first bright coating film is preferably 5 to 50 μm, and the dry film thickness of the second bright coating film is preferably 5 to 50 μm.
(6) In the coating film of the present invention, the first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass. A configuration in which the bright coating film contains 0.02 to 1% by mass of the second bright pigment in the solid content of the coating film can be adopted.

(7) The coating film according to the present invention is formed on a first bright coating film containing a first bright pigment on the surface of a non-transmissive base material and the first bright coating film. A second bright coating film containing the second bright pigment and a clear coating film formed on the second bright coating film are provided, and the first bright coating film is the first bright coating film. The coating film contains 0.01 to 5% by mass of the brilliant pigment of the above in the coating film solid content, and the second brilliant coating film contains the second brilliant pigment in the coating film solid content of 0.01. It is a coating film containing ~ 5% by mass, and the average particle size of the second bright pigment is relatively large with respect to the average particle size of the first bright pigment, and the first bright coating is formed. The film is characterized by containing 0.05 to 11% by mass of a light diffusing agent having an average particle size of 1 to 10 μm in the solid content of the coating film.
(8) In the coated material of the present invention , a configuration in which the dry film thickness of the first bright coating film is 5 to 50 μm and the dry film thickness of the second bright coating film is 5 to 50 μm can be adopted.
(9) In the coating film of the present invention, the first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass. A configuration in which the bright coating film contains 0.02 to 1% by mass of the second bright pigment in the solid content of the coating film can be adopted.

According to the method for forming a coating film of the present invention, it is possible to provide a coating film and a coated material capable of creating a high-class feeling by giving a three-dimensional effect having a transparent feeling and depth and depth on the surface of the base material. Can be done.
The three-dimensional effect with depth and depth according to the present invention is such that the average particle size of the second bright pigment arranged in the upper layer is relative to the average particle size of the first bright pigment arranged in the lower layer. By increasing the size, a sense of distance is created due to the relative size difference between the pigments, and the upper layer of the bright pigment covers a part of the lower layer of the bright pigment due to the overlap of the bright pigments, so that the upper and lower layers are raised and lowered. It is expressed by perceiving the position.

Further, by adding a light diffusing agent to the first bright coating film, the bright feeling of the first bright pigment is enhanced so that the difference in relative size from the second bright pigment can be clearly visually recognized. It becomes possible to further enhance the three-dimensional effect.

Further, by forming a clear coating film on the surface of the coated material to give a glossy feeling and efficiently reflecting the incident light by the non-transmissive property of the base material, it is possible to further enhance the high-class feeling.

In the coating film and the coated material of the present invention, the coating process can be three coats and one bake, and it is possible to reduce the appearance defect and the cost.

FIG. 6 is a schematic cross-sectional view showing a first embodiment of a coating film and a coated material according to the present invention.

Hereinafter, the details of the present invention will be described with reference to embodiments of the present invention.
The coating film A in the embodiment of the present invention is a first bright coating film 4 shown in FIG. 1, a second bright coating film 5 and a clear coating film 6 sequentially formed on the first bright coating film 4. It is composed. The first bright coating film 4 contains a first bright pigment 2 and a light diffusing agent 7, and the second bright coating film 5 contains a second bright pigment 3.
The coating material B according to the embodiment of the present invention is formed by sequentially laminating and forming a non-translucent base material 1 and the surface of the base material 1, a first bright coating film 4, a second bright coating film 5, and a clear coating. It is composed of a film 6.

The base material 1 is not particularly limited as long as it is non-translucent, and is not particularly limited to metals such as iron and aluminum, various plastic molded products such as polyethylene resin, polypropylene resin, ABS resin, and polystyrene resin. SMC (Sheet Molding Compound) formed by impregnating a resin composition obtained by kneading a saturated polyester resin or the like with an inorganic filler such as calcium carbonate or aluminum hydroxide with glass fibers or kneading the resin composition with glass fibers Examples thereof include FRP molded products in which the formed BMC (bulk molding compound), TMC (tic molding compound) and the like are used as molding materials and shaped into a desired shape under high temperature and high pressure.
Further, the surface of the base material 1 may be formed by metal plating or metal vapor deposition, or may be formed by a non-transmissive coating film. Therefore, for example, the base material 1 may be used in which the inner side is made of a translucent material such as glass, ceramics, or a transparent resin, and a non-translucent film or coating film is formed only on the surface.
In order to ensure the adhesion to the coating film, the surface of the base material 1 may be roughened in advance with an abrasive or the like, or a primer layer may be provided.

The first bright coating film 4 in the present invention is a coating film containing the first bright pigment 2 on the surface of the base material 1 in an amount of about 0.01 to 5% by mass in the solid content of the coating film, and is preferably bright. It is formed by containing 0.02 to 1% by mass of the sex pigment 2. If the content of the first bright pigment 2 is less than 0.01% by mass, a sufficient grain feeling cannot be felt and it becomes difficult to visually recognize the particles of the first bright pigment 2, and conversely, the first. If the content of the brilliant pigment 2 exceeds 5% by mass, the metallic feeling becomes too strong and the color tone of the base material 1 itself is lost, so that the desired design can not be obtained.

The thickness of the first bright coating film 4 is preferably about 5 to 50 μm as a dry film thickness. When the film thickness is 5 μm or less, it is difficult to secure a boundary surface with the second bright coating film 5, and there is a problem that the surface has poor smoothness. On the other hand, if the film thickness of the first bright coating film 4 exceeds 50 μm, the uniformity is likely to be impaired due to the flow of the bright material immediately after painting, and liquid dripping is likely to occur when the first bright coating film 4 is painted, which is an appearance problem. Is likely to occur.

A light diffusing agent 7 is added to the first bright coating film 4. Since the brilliance of the first brilliant pigment 2 in the lower layer is concealed with a relatively smaller particle size than that of the second brilliant pigment 3 in the upper layer, the amount of light reflected is reduced, and as a result, the first brilliant pigment 2 is concealed. Since the presence of the bright coating film 4 is reduced and the effect of the three-dimensional effect (perspective) is reduced, this phenomenon is prevented. As a measure for reducing the three-dimensional effect, the inventor has derived that the light diffusing agent 7 can be dispersed in the first bright coating film 4 to bring out a more three-dimensional effect.
Due to the addition of the light diffusing agent 7, the orientation of the first bright pigment 2 in the first bright coating film 4 is not constant, and the orientation becomes random. Therefore, the light diffusing agent 7 causes reflected light in all directions. You will be able to return and show brilliance regardless of the viewing angle. As a result, the difference in relative size from the second bright pigment 3 in the upper layer can be clearly visually recognized, and a more three-dimensional effect can be produced.

The light diffusing agent 7 in the present invention is not particularly limited, but inorganic particles such as silica and resin particles such as acrylic resin and urethane resin can be used. Preferably, crosslinked acrylic acid-based resin particles that can ensure the transparency of the coating film, can be easily dispersed in the coating film forming resin, and have excellent weather resistance are used. Further, the light diffusing agent 7 is added in consideration of the shape, particle size, and addition amount in order to maintain the transparency and gloss of the first bright coating film 4. Preferably, spherical fine particles are used.
The particle size of the light diffusing agent 7 is selected to be smaller than the dry film thickness of the first bright coating film 4, and an average particle size of 1 to 10 μm is preferably used. This is because if a coating film having a large particle size is used, the smoothness of the surface of the first coating film is lowered, the gloss and smoothness of the finally obtained coating film are impaired, and it is difficult to feel a sense of quality. On the other hand, if a pigment having a thickness of less than 1 μm is used, the orientation of the brilliant pigment is unlikely to change, and the scattering efficiency is lowered, resulting in a brilliant feeling. The amount added is 0.05 to 11% by mass in the solid content of the coating film. If it is less than 0.05% by mass, light scattering is weak and a difference in brilliance between the first brilliant pigment 2 and the second brilliant pigment 3 is unlikely to occur, and if it exceeds 11% by mass, the smoothness of the coating film surface becomes smooth. It is not possible to obtain a high-quality coating film having a decrease and gloss and smoothness.

The second bright coating film 5 in the present invention is formed on the surface of the first bright coating film 4, and the first bright coating film 4 is in a state where the thinner component is volatilized to some extent by air drying or the like. It can be formed by recoating by a wet-on-wet method, and the first bright coating film 4 can be reapplied in a cured state.

The content of the second bright pigment 3 in the second bright coating film 5 is about 0.01 to 5% by mass in the solid content of the coating film, preferably about 0.01 to 5% by mass, as in the case of the first bright coating film 4. It is formed by containing 0.02 to 1% by mass. If the content of the second brilliant pigment 3 is less than 0.01% by mass, sufficient graininess is insufficient and it is difficult to visually recognize, and conversely, the content of the second brilliant pigment 3 exceeds 5% by mass. The metallic feeling becomes too strong, the color tone of the base material 1 itself is lost, and the presence of the first bright coating film 4 is lowered, so that the desired design property cannot be obtained.

The thickness of the second brilliant coating film 5 is preferably about 5 to 50 μm as a dry film thickness. When the thickness of the second brilliant coating film 5 is 5 μm or less, there is a problem that the surface has poor smoothness. On the other hand, if the thickness of the second brilliant coating film 5 exceeds 50 μm, the uniformity is likely to be impaired by the flow of the brilliant pigment 3 immediately after coating, and when the shape is coated, liquid dripping is likely to occur. The above problem is likely to occur.

The clear coating film 6 in the coating film of the present invention is for imparting a glossiness, smoothness, and transparency on the surface of the coating film and preventing the second bright pigment 3 from being exposed to the surface. The clear coating film 6 is formed on the surface of the second bright coating film 5, and is applied to the second bright coating film 5 by a wet-on-wet method or a state in which the second bright coating film 5 is cured. It is formed in layers.
The thickness of the clear coating film 6 is preferably about 5 to 50 μm as a dry film thickness. If the thickness of the clear coating film 6 is 5 μm or less, there is a problem that the surface has poor smoothness. On the contrary, when the thickness of the clear coating film 6 exceeds 50 μm, when coating on a shaped object, liquid dripping is likely to occur immediately after coating, and an appearance problem is likely to occur.

The resin for forming the bright coating films 4 and 5 in the present embodiment is not particularly limited, but a curable resin capable of forming a crosslinked structure so as to have durability of the coating film is preferable. As the curing method, a room temperature curing type, a heat curing type, an ultraviolet ray or an electron beam curing type and the like can be used.
The coating composition using the thermosetting resin is composed of, for example, an acrylic or urethane polymer containing a hydroxyl group as a crosslinkable functional group and a crosslinker containing an isocyanate group, if necessary. A curing catalyst may be contained. In addition, it can be used by dissolving or dispersing it in an organic solvent or water as needed, and it can be used as an antifoaming agent, a leveling agent, a sagging agent, an ultraviolet absorber, an antistatic agent, and a pigment that does not lose light transmission. And dyes can also be blended.

Among the various coating compositions, the coating composition using an ultraviolet curable resin reacts with an acrylic resin having an acrylate-based functional group, an epoxy resin, a polyester resin, a urethane resin, or the like with an acrylic-modified oligomer or prepolymer. It is composed of ethyl (meth) acrylate, ethylhexyl (meth) acrylate and the like, which are sex diluents, and a photopolymerization initiator. In addition, it can be used by dissolving or dispersing it in an organic solvent or water as needed, and it can be used as an antifoaming agent, a leveling agent, a sagging agent, an ultraviolet absorber, an antistatic agent, and a pigment that does not lose light transmission. And dyes can also be blended.

The coating method for forming a coating film in the present invention may be any of air spray, airless spray, brush coating and the like, but spray coating having excellent paintability of a three-dimensional shape is preferably used.

The heat-resistant temperature of the base material 1 is taken into consideration as the drying and curing conditions of the coating film, but in the case of a thermosetting resin, it is generally carried out in the range of room temperature to 140 ° C., and the degree of volatilization and the degree of curing of the solvent. It will be carried out by selecting an appropriate time from. In the case of an ultraviolet curable resin, after volatilizing the solvent at a predetermined temperature, it is cured by irradiating an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a metal halide lamp or the like.

The bright pigments 2 and 3 for forming the bright coating films 4 and 5 in the present invention are not particularly limited, but for example, metal powder such as aluminum, iron oxide, titanium oxide, and the like on the surface of glass flakes. Those having a brilliant feeling coated with silver or the like can be used.
As the glitter pigments 2 and 3, those having an average particle size of 10 to 150 μm and those having a thickness of 0.1 to 5 μm are used.

If the average particle size of the glitter pigments 2 and 3 is 10 μm or less, it is difficult to visually recognize the particles. On the contrary, if the average particle size exceeds 150 μm, the dispersibility in the paint is lowered and uniform coating becomes difficult. Handleability is reduced, such as clogging of the particles. If the thickness of the brilliant pigment 2 is less than 0.1 μm, deformation or the like occurs when the paint components are agitated, and conversely, if the thickness of the coating film exceeds 5 μm, the smoothness is impaired and the appearance of the coating film is deteriorated. Is. Further, as the second bright pigment 3 contained in the second bright coating film 5, one having an average particle size larger than that of the first bright pigment 2 of the first bright coating film 4 is used. .. Preferably, the first bright material pigment 3 has an average particle size of 10 to 40 μm, and the second bright material pigment 3 has an average particle size of 40 to 150 μm. This is because the larger the average particle size, the higher the brilliance, and the difference in brilliance from the smaller average particle size makes it possible to amplify and feel the three-dimensional effect.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the description of the following Examples.
(Preparation of base material)
In each example, SMC (Sheet Molding Compound) was used as the molding material for forming the base material. SMC consists of 85 parts by mass (60 parts by mass of styrene) of unsaturated polyester resin sandoma 9415 (manufactured by DIC Material Co., Ltd., trade name) dissolved in styrene and 15 parts by mass of polystyrene dissolved in styrene (60 parts by mass of styrene). (Contains) 1.0 part by mass of organic oxide percure HI (manufactured by Nichiyu Co., Ltd., trade name), 0.77 part by mass of polymerization inhibitor parabenzoquinone, and zinc stearate as a release agent, based on 100 parts by mass of the mixture. An unsaturated polyester resin composition was obtained by blending 2.5 parts by mass, 3.0 parts by mass of dark gray toner, 2.0 parts by mass of magnesium oxide as a thickener, and 150 parts by mass of calcium carbonate as a filler. .. The unsaturated polyester resin composition thus blended and kneaded was impregnated into glass fibers to prepare an SMC.

As the base material, the obtained SMC was placed on the upper surface of the front surface mold, and the back surface mold was pressed from above to obtain a 200 mm square flat plate by heat and pressure molding. The molding conditions were an SMC input amount of 400 g, a molding pressure of 5.88 MPa, and a holding time of 3 minutes, and molding was performed at a surface mold of 140 ° C. and a surface mold of 130 ° C. The surface of the obtained base material was degreased with acetone without any special pretreatment to prepare a base material for coating.

(Adjustment of paint for forming clear coating film)
As the paint for forming each coating film, Hals High Coat HHT9 manufactured by Koshin Chemical Co., Ltd., which is a two-component curable organic solvent-based clear paint, is used, the main agent is a hydroxyl group-containing acrylic resin, and the cross-linking agent is an isocyanate compound. Butyl acetate was used as the diluting solvent.
The paint was prepared by mixing and stirring 15 parts by mass of the cross-linking agent and 30 parts by mass of butyl acetate with 100 parts by mass of the main agent to prepare a paint for forming a clear coating film.

(Adjustment of paint for forming bright coating film)
Metashine 2080PS (average particle size 80 μm, substrate thickness 1 μm) or Metashine 5150PS (average particle size) in which the above paint for forming a clear coating film is coated with silver on glass flakes made by Nippon Sheet Glass as a second bright pigment. Metashine 1030PS (average particle size 30 μm, base material thickness 1 μm) was mixed and stirred as a first bright pigment (150 μm, base material thickness 5 μm), respectively, to prepare a bright paint.
Further, as the light diffusing agent contained in the first bright coating film, spherical fine particles MBX-5 (average particle size 5 μm) and MBX-30 (average particle size) of crosslinked polymethyl methacrylate manufactured by Sekisui Plastics Co., Ltd. 30 μm) was used.

(Example 1)
0.015 parts by mass of Metashine 1030PS was added as the first bright pigment to the clear coating film forming paint (0.04% by mass in the solid content of the resin coating film), and MBX-5 was added as a light diffusing agent. The first brilliant paint prepared by adding 1 part by mass (2.5% by mass in the solid content of the resin coating film) was applied to the surface of the substrate so as to be a cured coating film of 20 to 30 μm, and then at room temperature. The first bright coating film 4 was obtained. Next, a second produced by adding 0.015 parts by mass of the Metashine 2080PS as a second bright pigment to the clear coating film forming paint (0.04% by mass in the solid content of the resin coating film). The brilliant coating film was applied to the surface of the first brilliant coating film 4 as a cured coating film to a size of 20 to 30 μm, and then left at room temperature for 15 minutes to obtain a second brilliant coating film 5.
Further, a clear coating film for forming a clear coating film is applied to the surface of the second bright coating film 5 so as to be 30 to 40 μm as a cured coating film, and then left at room temperature for 15 minutes and then dried by hot air to 100. The multi-layer coating film was simultaneously dried and cured by heating at ° C. for 60 minutes to obtain a coating film by a 3-coat 1-bake method.

(Example 2)
4.5 parts by mass of MBX-5 was added as a light diffusing agent to the bright coating material for forming the first bright coating film 4 of Example 1 (10.3% by mass in the solid content of the resin coating film). A coated product was obtained in the same procedure as in Example 1 except that the product was produced in the same manner as in Example 1.

(Example 3)
0.025 parts by mass of MBX-5 as a light diffusing agent was added to the bright coating material for forming the first bright coating film 4 of Example 1 (0.06% by mass in the solid content of the resin coating film). A coated product was obtained in the same procedure as in Example 1 except that the product was produced in the same manner as in Example 1.

(Example 4)
Same as Example 1 except that it was produced by adding 0.015 parts by mass of the Metashine 5150PS as the second bright pigment of Example 1 (0.04% by mass in the solid content of the resin coating film). The painted material was obtained by the procedure of.

(Comparative Example 1)
An SMC molded product that was not painted was used as the evaluation plate.

(Comparative Example 2)
On the surface of the base material of the SMC molded product, 0.015 parts by mass of Metashine 2080PS (0.04% by mass in the solid content of the resin coating film) as the first bright pigment in the clear coating film forming paint, 2 The first brilliant paint prepared by adding 0.015 parts by mass (0.04% by mass in the solid content of the resin coating film) of Metashine 1030PS as the second brilliant pigment was used as a cured coating film on the surface of the substrate. The coating film was applied so as to have a thickness of 20 to 30 μm, and then left at room temperature for 15 minutes to obtain a bright coating film.
Next, a paint for forming a clear coating film is applied to the surface of the bright coating film as a cured coating film so as to have a thickness of 30 to 40 μm, and then left at room temperature for 15 minutes and then heated by hot air drying at 100 ° C. for 60 minutes. Then, the multi-layer coating film was dried and cured at the same time to obtain a coated product by a 2-coat 1-bake method.

(Comparative Example 3)
A coating material was obtained in the same procedure as in Example 1 except that a light diffusing agent was not added to the bright coating material for forming the first bright coating film 4 of Example 1.

(Comparative Example 4)
Metashine 2080PS (average particle size 80 μm, substrate thickness 1 μm) is used as a bright pigment for forming the first bright coating film 4 of Comparative Example 3, and bright for forming the second bright coating film 5. A coating film was obtained in the same procedure as in Example 1 except that Metashine 1030PS (average particle size 30 μm, substrate thickness 1 μm) was used as the sex pigment.

(Comparative Example 5)
The paint for forming a clear coating film was applied to the surface of the base material as a cured coating film so as to have a thickness of 20 to 30 μm, and then left at room temperature for 15 minutes to obtain a clear coating film. Next, 0.015 parts by mass (0.04% by mass in the solid content of the resin coating film) of Metashine 2080PS (average particle size 80 μm, substrate thickness 1 μm) was added to the clear coating film forming paint as a bright pigment. And the brilliant paint prepared by adding 0.015 parts by mass (0.04% by mass in the solid content of the resin coating film) of Metashine 1030PS (average particle size 30 μm, base material thickness 1 μm) was applied to the clear coating. The surface of the film was coated with a cured coating film having a thickness of 20 to 30 μm, and then left at room temperature for 15 minutes to obtain a first bright coating film.
Further, a paint for forming a clear coating film is applied to the surface of the bright coating film as a cured coating film so as to have a thickness of 30 to 40 μm, and then left at room temperature for 15 minutes and then heated by hot air drying at 100 ° C. for 60 minutes. The multi-layer coating film was dried and cured at the same time to obtain a coating film by a 3-coat 1-bake method.

(Comparative Example 6)
A coated product was obtained in the same procedure as in Example 1 except that the light diffusing agent of Example 1 was added to the second bright coating film 5 instead of the first bright coating film.

(Comparative Example 7)
It was prepared by adding 7 parts by mass of MBX-5 as a light diffusing agent (15% by mass in the solid content of the resin coating film) to the bright coating material for forming the first bright coating film 4 of Example 1. A coated product was obtained in the same procedure as in Example 1 except for the above.

(Comparative Example 8)
0.01 parts by mass of MBX-5 as a light diffusing agent was added to the bright coating material for forming the first bright coating film 4 of Example 1 (0.03% by mass in the solid content of the resin coating film). A coated product was obtained in the same procedure as in Example 1 except that it was produced in the same manner as in Example 1.

(Comparative Example 9)
4.5 parts by mass of MBX-30 as a light diffusing agent was added to the bright coating material for forming the first bright coating film 4 of Example 1 (10.3% by mass in the solid content of the resin coating film). A coated product was obtained in the same procedure as in Example 1 except that the product was prepared in the same manner as in Example 1.

The evaluation of the obtained coating material was carried out by the method described below. The evaluation results are shown in Table 1.
(Measurement of mirror gloss value)
The surface of the painted object was measured for 60-degree and 20-degree mirror gloss values using a handy gloss meter IG-331 (manufactured by HORIBA, Ltd., trade name). In the judgment, the equivalent value (60 degrees: 88, 20 degrees: 81) with respect to the glossiness value (60 degrees: 88, 20 degrees: 81) when only the clear coating film was applied was evaluated as “◯”, and the value reduced by 10% or more was evaluated as “x”.

(Visual evaluation of three-dimensional effect)
An evaluation plate was placed indoors 2 m below the fluorescent lamp, and the coating film was visually observed from a position tilted at an angle of 15 degrees and 45 degrees from directly above 500 mm, and the stereoscopic effect was evaluated in the following three stages. ..
In the judgment, the total score of the measurement result of 15 degrees and the measurement result of 45 degrees was 6 points as "○", and the other points were "x".
3: It is possible to confirm a brilliant material in which a high brilliance feeling and a low brilliance feeling are mixed and the particle size is different, and a three-dimensional effect is exhibited.
2: It is difficult to confirm the brilliant materials having different particle sizes, or the difference in brilliant sensation is small.
1: It is difficult to feel the difference in brilliance or there is no brilliance.

The evaluation results are shown in Table 1 below. In the comprehensive judgment, those with all judgment values of "○" were regarded as "○", and the others were regarded as "x".

In Examples 1 to 4, a first bright coating film containing a first bright pigment having a small average particle size and a second bright pigment containing a second bright pigment having a large average particle size from the surface of the base material. By forming the coating film in the order of the brilliant coating film and the clear coating film, a coated product having a three-dimensional effect was obtained. Further, by adding a light diffusing agent, bright materials having relatively different sizes can be visually recognized more clearly, and the three-dimensional effect can be amplified. This painted product had an excellent three-dimensional effect from any direction of 15 degrees or 45 degrees, and had an excellent glossiness from any direction of 60 degrees or 20 degrees.
As in Comparative Example 1, a base material made of an SMC molded product having no coating film had a glossiness but a poor three-dimensional effect.
In the specification in which the coating film is formed in the order of the first brilliant pigment, the brilliant coating film containing the second brilliant pigment, and the clear coating film from the surface of the base material as in Comparative Example 2, although there is glossiness, The sensation of floating pigments in the air cannot be obtained, and the three-dimensional effect is poor.

In Comparative Example 3, a coated material having a three-dimensional effect was obtained, but when the viewing angle was changed, the bright pigment in the first bright coating film could not be visually recognized, and the three-dimensional effect was obtained regardless of the viewing angle. I couldn't get a painted product.

A second brilliant coating film containing a second brilliant pigment having a large average particle size and a first brilliant coating containing a first brilliant pigment having a small average particle size as in Comparative Example 4. In the specification in which the coating film is formed in the order of the film and the clear coating film, the observer's viewpoint matches the second bright pigment having a large average particle size, so that the three-dimensional effect with the first bright pigment having a small average particle size Become scarce.
Further, in the specification in which a clear coating film is formed from the surface of the base material, a brilliant coating film containing two types of brilliant pigments having different average particle sizes, and a clear coating film are formed in this order as in Comparative Example 5, the brilliance is achieved. Since the pigments show a brilliant feeling on the same plane, the three-dimensional effect is poor.

On the other hand, when a light diffusing agent is added to the second bright coating film containing the second bright pigment having a large average particle size as in Comparative Example 6, the difference in viewing angle between the second bright pigments is different. Although it was possible to improve the difference in brilliance due to the above, the brilliance itself was lowered and the stereoscopic effect could not be amplified. This is because the reflected light when the light from the light source reaches the second brilliant pigment is refracted in various directions and emitted, so that the second brilliance having a large particle size, which originally had a strong brilliant feeling, is particularly strong. It is considered that this is because the brilliance of the sex pigment was reduced.
Further, as a result of increasing the amount of the light diffusing agent added as in Comparative Example 7, the smoothness of the surface was lowered and the glossiness was lowered. On the contrary, when the amount of the light diffusing agent added was reduced as in Comparative Example 8, the effect of the addition was lost and the three-dimensional effect was poor.

As in Comparative Example 9, when a light diffusing agent having a large particle size was used, an appearance having a three-dimensional effect was obtained, but the smoothness of the coating film surface was impaired and a dull coated product was obtained.

According to the present invention, it is possible to provide a coating film, a method for producing the same, and a coated material that can bring out a high-class feeling by giving a three-dimensional effect having depth and depth on the surface of the base material.

A ... coating film, B ... coating film, 1 ... base material, 2 ... first bright pigment, 3 ... second bright pigment, 4 ... first bright coating film, 5 ... second bright coating film , 6 ... Clear coating, 7 ... Light diffusing agent.

Claims (9)

A coating film in which a first bright coating film containing a first bright pigment, a second bright coating film containing a second bright pigment, and a clear coating film are sequentially laminated and formed on the surface of a base material. In the method of forming the film,
The first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.01 to 5% by mass, and the second bright coating film is the second bright coating film. A coating film containing 0.01 to 5% by mass of a pigment in the coating film solid content.
The average particle size of the second bright pigment is made relatively large with respect to the average particle size of the first bright pigment, and the average particle size of the first bright coating film is 1 to 10 μm. A method for forming a coating film, which comprises adding a light diffusing agent in the solid content of the coating film in an amount of 0.05 to 11% by mass. The method for forming a coating film according to claim 1 , wherein the dry film thickness of the first bright coating film is 5 to 50 μm, and the dry film thickness of the second bright coating film is 5 to 50 μm. The first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass, and the second bright coating film is the second bright coating film. The method for forming a coating film according to claim 1 or 2 , wherein the coating film contains 0.02 to 1% by mass of a pigment in the solid content of the coating film. A first bright coating film containing a first bright pigment, a second bright coating film formed on the first bright coating film and containing a second bright pigment, and the second bright coating film. A clear coating film formed on the bright coating film of
The first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.01 to 5% by mass, and the second bright coating film is the second bright coating film. A coating film containing 0.01 to 5% by mass of a pigment in the coating film solid content.
The average particle size of the second bright pigment is made relatively large with respect to the average particle size of the first bright pigment, and light having an average particle size of 1 to 10 μm is applied to the first bright coating film. A coating film containing 0.05 to 11% by mass of a diffusing agent in the solid content of the coating film. The coating film according to claim 4, wherein the first bright coating film has a dry film thickness of 5 to 50 μm, and the second bright coating film has a dry film thickness of 5 to 50 μm. The first brilliant coating film is a coating film containing the first brilliant pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass, and the second brilliant coating film is the second brilliant coating film. The coating film according to claim 4 or 5, wherein the coating film contains 0.02 to 1% by mass of a pigment in the solid content of the coating film. A first bright coating film containing a first bright pigment on the surface of a non-transmissive base material, and a second bright coating film formed on the first bright coating film and containing a second bright pigment. The bright coating film of 2 and the clear coating film formed on the second bright coating film are provided.
The first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.01 to 5% by mass, and the second bright coating film is the second bright coating film. A coating film containing 0.01 to 5% by mass of a pigment in the coating film solid content.
The average particle size of the second bright pigment is made relatively large with respect to the average particle size of the first bright pigment, and light diffusion having an average particle size of 1 to 10 μm on the first bright coating film. A coating product characterized in that the agent is contained in the solid content of the coating film in an amount of 0.05 to 11% by mass. The coating product according to claim 7 , wherein the dry film thickness of the first bright coating film is 5 to 50 μm, and the dry film thickness of the second bright coating film is 5 to 50 μm. The first bright coating film is a coating film containing the first bright pigment in the solid content of the coating film in an amount of 0.02 to 1% by mass, and the second bright coating film is the second bright coating film. The coating film according to claim 7 or 8, wherein the coating film contains 0.02 to 1% by mass of a pigment in the solid content of the coating film.

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