JPH08173899A - Natural stone tone coating method and natural stone tone coating composition used to this - Google Patents

Abstract

PURPOSE: To make naturally a natural stone tone feeling by applying a natural stone tone coating composition comprising essentially a transparent dispersion medium capable of dispersing pattern color forming dispersion phase particles consisting of plural colors and having a prescribed grain size distribution in particle state on an undercoat layer. CONSTITUTION: A natural stone tone coating is executed by applying pattern color forming dispersion phase particles consisting of plural colors and having 1-15mm grain size distribution and a transparent dispersion medium capable of dispersing the dispersion phase particles in particle state on the undercoat layer. Then, in the dispersion medium capable of dispersing the dispersion phase particles in particle state, when the dispersion medium is insufficient in transparency, since the dispersion medium is superposed on a surface of the pattern forming component and a background color forming component and a precious multicolor pattern is prevented, transparency is required at the time of becoming substantially to a dry coated film. But, proper coloring is possible within a range does not preventing the multicolor pattern. And then, in the natural stone tone coating composition, the pattern forming component and the background color forming component are crushed owing to pressure at the time of applying and the natural stone tone pattern is formed.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a building, a civil engineering structure,
The present invention relates to a coating method or a coating composition for applying a natural stone tone pattern on the inside and outside wall surfaces, floors, ceiling surfaces and rooftops of play facilities, etc. The present invention provides a laminated coating film for forming a surface at low cost and a coating composition for the top coating thereof.

[0002]

2. Description of the Related Art Natural stone is often used as a surface decorative material for buildings, and a deep and calm color tone peculiar to natural products is widely preferred. However, natural stone has many drawbacks such as high price, difficulty in processing, and high weight. In particular, the high weight and difficulty in processing make it easy to use when used as a decorative material on the outer wall of a building.
There were many safety issues. Therefore, in recent years, there has been proposed a natural stone-like paint or a coating method that is inexpensive and can be easily applied, excluding such defects of natural stone. For example, in Japanese Patent Laid-Open No. 57-27177, as a decorative wall surface finishing method expressing a natural stone pattern, a spraying material prepared by mixing acrylic resin emulsion and aggregates of two or more colors such as marble powder and granite powder is sprayed. After that, form an uneven pattern with a large step, and after drying, cut the top surface of the convex portion flat to expose the cross section of the colored aggregate on the cut surface, and then make the entire surface transparent acrylic or acrylic-urethane type A decorative wall surface finishing method of coating with a resin for finishing is described. Further, Japanese Patent Application Laid-Open No. 58-96664 describes a coating composition for forming a natural stone pattern, which comprises an aggregate having a specific light transmittance and a binder forming a nearly colorless and transparent film. There is. By combining the aggregates with a binder, a pattern and a volume feeling similar to natural stone can be obtained. In addition, in Japanese Patent Laid-Open No. 59-210150, as a building and a coating method, a plurality of types of mixed materials of different colors prepared by mixing ceramics, which are baked and pulverized with pigments, into a synthetic resin are prepared. , Simultaneously spraying the plural kinds of mixed materials from separate spray ports of a multi-headed gun,
A method is described for applying a non-mixed multicolor onto the surface. Further, Japanese Patent Application Laid-Open No. 58-119376 discloses a method for forming a glaze-like and / or dark-like coated surface.
When at least two kinds of paints having different tones and / or transparency are applied to the surface to be coated, a multi-head gun, a single-head gun, or both in order to mix the paints non-uniformly in the spraying process or on the applied surface It is to be painted by using together. In this case, a method is described in which a multi-head gun simultaneously paints materials having different color tones from separate spraying ports, and a single-head gun paints paints having different colors in two or more steps. In addition, in JP-A-64-11673, the undercoat paint is applied to the surface of the base material in advance and dried by touch or dried, or directly on the surface of the base material to obtain a color tone different from that of the undercoat paint or the base material. Different from each other and different in color tone from each other, several kinds of intermediate coating materials having a low solid content are respectively applied so as to form a granular discontinuous coating, and each discontinuous coating is a finger after forming each coating. Touch dry or dry,
The final drying completely dry the entire coating film. In this case, a method is described in which the intermediate paints having different color tones are separately applied by a spray gun.

[0003]

However, when a specific aggregate or colored ceramic aggregate is used as a pattern forming material, it is difficult to form a large pattern such as natural stone, and in order to obtain a large pattern. If the particle size of the aggregate is forcibly increased, the aggregate will settle in the paint or it will be difficult to appropriately disperse the aggregates of several colors. Further, by using the paint containing aggregate, although the one closer to natural stone can be obtained, the weight of the paint used becomes large and the painting work is also a heavy labor. In the case of multicolor finishing, after spraying the first color, the coating material containing different color aggregates is overcoated, and then overcoating is performed. There was a problem in construction such as becoming. Further, when a special coating gun such as a multi-headed gun is used, it is necessary to simultaneously apply a paint containing different color aggregates, and there is a problem in that the skill of the coating technique and the poor handling due to the high weight are difficult. In addition, the unevenness that appears when painted is closer to that of natural stone.Therefore, when the surface is ground with a sander and smoothed, the number of steps increases and the efficiency of finishing work increases. Was much worse than the finish with ordinary paint. Therefore, construction costs such as personnel costs were also increasing. In addition to that, since the paint containing aggregate thickens itself, there is a problem that the material cost per unit area becomes very expensive as compared with general paint.
Then, at least two with different tones and / or transparency
In the method of painting so as to mix different kinds of paint in a non-uniform manner, there are problems when using a special coating gun called a multi-headed gun as described above, and at least when using a single-headed gun. Since the two kinds of paints are applied several times, uneven coating such as overlapping of the same color on a specific part occurs, and it depends largely on the skill of the painter to achieve a beautiful finish. In addition, the pattern of natural stone has the appearance that the parts to be patterned are scattered with respect to the hue of the whole base material, but to form this background color and pattern color by painting, the background paint and pattern It is necessary to set delicate conditions such as the ratio of the paint to be used and the size of the sprayed particles, and it is difficult to adjust this by using paints of different hues and using a multi-head or single-head gun. Next, apply the undercoat paint to the surface of the base material in advance, and the color tones of the undercoat paint and the base material will be different from each other, and the respective colors will also differ from each other. In the method of applying so as to form a discontinuous film, since the intermediate coating paints having different color tones are applied several times in the same manner as described above, there is a problem of uneven coating such as overlapping of the same color on a specific portion. In the method, it was difficult to set the conditions for forming the appearance such as the background color and the pattern color of natural stone. Therefore, one of the problems to be solved by the present invention is to provide a natural stone-like texture without using a conventional aggregate-containing paint, and to form a laminated coating film full of volume at a low cost. It is to provide a stone coating method. Also, as other issues,
A natural stone tone paint having specific physical properties is applied to a specific undercoat layer to provide a coating film having natural stone tone and flexibility. In addition, there is no problem when using a special coating gun, and the pattern color and background color can be added by one coating, and it is easy to adjust the size and hue of the pattern color and background color. A coating composition is provided. Further, it is an object of the present invention to provide a coating method and a coating composition capable of producing a granite-like texture among natural stones by setting a color difference between a coating base, a pattern color, and a background color in a specific range. There is.

[0004]

In order to solve such a problem, the inventors of the present invention have conducted earnest research and found that natural stone materials have a pattern portion scattered with respect to the hue of the whole base material. Since it is an external appearance, the entire base material is positioned as the background color, the pattern part is positioned as the pattern color, and the multicolored paint in which the colored particles as the disperse phase are dispersed in the transparent dispersion medium Focusing on the point of forming a multicolored paint film that forms a pattern of the number of colors of colored particles, by combining it with an undercoat layer, it is not necessary to use an expensive natural stone-like special paint containing aggregate that complicates the work process. However, the present invention has been completed by finding that a natural stone tone finish is possible.

That is, the present invention is as follows: A natural stone tone paint composition comprising a pattern color forming dispersed phase particle having a particle size distribution of a plurality of colors of 1 mm to 15 mm and a transparent dispersion medium capable of dispersing the dispersed phase particle in a particle state as main constituents, A natural stone-like coating method characterized by coating on the undercoat layer. Also, a natural stone-like coating composition containing background color-forming dispersed phase particles having a particle size distribution of 0.001 mm to 1 mm, a specific undercoat layer, and a natural stone-like coating composition to be used. The object is provided as a specific composition. 2. CIE 1976 L ^* a ^* b ^* pattern-color-forming dispersed phase particles having a particle size distribution of 1 mm to 15 mm composed of a plurality of colors having a maximum color difference ΔE (hereinafter referred to as “ΔE”) of 5 to 10 , A natural stone tone composition having a transparent dispersion medium capable of dispersing the pattern color forming dispersed phase particles in a particle state as a main constituent, and ΔE with each of the pattern color forming dispersed phase particles having a minimum value. A natural stone tone coating method, characterized in that it is applied to a coating base having a hue of 0.1 to 1. 3. The minimum value of the color difference ΔE between the pattern-forming dispersed phase particles having a particle diameter distribution of 1 mm to 15 mm and consisting of a plurality of colors having the maximum color difference ΔE of 5 to 10 and the color difference ΔE is 0.1. Particle size distribution of ~ 1 is 0.001mm ~ 1mm
Background color forming dispersed phase particles, and a natural stone coating composition characterized by coating a natural stone coating composition containing a transparent dispersion medium capable of dispersing the dispersed phase particles in a particle state as a main constituent on a coating base. Method. Also, the natural stone-like coating composition according to items 2 and 3 has a specific composition. 4. A pattern color forming dispersed phase particle having a plurality of colors and having a glass transition temperature (hereinafter referred to as “Tg”) of its constituent resin of 10 ° C. to 60 ° C. and a particle size distribution of 1 mm to 15 mm, and the dispersed phase particle. A natural stone-like coating composition containing a transparent dispersion medium that can be dispersed in a particle state as a main component has a tensile strength of 3
A natural stone-like coating method characterized by coating an elastic coating film surface having an elongation of 0 N / cm ² or more, an elongation rate of 100% or more, and a water permeability of 0.5 ml / 24 h or less. 4. In item 4, the color difference ΔE of the pattern color forming dispersed phase particles and the color difference ΔE between each of the pattern color forming dispersed phase particles and the coating base are adjusted to a specific value. The pattern color forming dispersed phase particles having a plurality of colors and having a glass transition temperature (hereinafter referred to as “Tg”) of the constituent resin of 10 ° C. to 60 ° C. and a particle size distribution of 1 mm to 15 mm, and the constituent resin Tg. Natural stone mainly composed of background color forming disperse phase particles having a particle size distribution of 0.001 mm to 1 mm and a transparent dispersion medium capable of dispersing the disperse phase particles in a particle state at 10 ° C to 60 ° C. Tensile strength of the coating composition is 30N
/ Cm ² or more, the elongation of the coating film is 100% or more, and the water permeation rate is 0.5 ml / 24 hours or less. And the color difference ΔE of the pattern color forming dispersed phase particles and the color difference ΔE of each of the pattern color forming dispersed phase particles and the background color forming dispersed phase particles.
To be adjusted to a specific value. 6. Pattern color forming dispersed phase particles having a particle size distribution of plural colors of 1 mm to 15 mm, background color forming dispersed phase particles having a particle size distribution of 0.001 mm to 1 mm, and transparent capable of dispersing the dispersed phase particles in a particle state. A natural stone tone paint composition having a dispersion medium as a main constituent, wherein the dispersed phase and the dispersion medium are (a) a polyvinyl alcohol aqueous solution, (b) a vinyl-based synthetic resin having an acid value and a coloring material as essential components. A natural stone-like coating composition comprising a mixture of a plurality of different colors of an oil-in-water type suspension composition containing (c) an organic titanate compound dispersed therein. 7. CIE 1976 L ^* a ^* b ^* Pattern color-forming dispersed phase particles having a particle size distribution of 1 mm to 15 mm and composed of a plurality of colors having a maximum color difference ΔE (hereinafter, “ΔE”) of 5 to 10 in a color space And ΔE of each of the pattern color forming dispersed phase particles
Among them, the particle size distribution with the minimum value of 0.1 to 1 is 0.0
A natural stone tone paint composition comprising, as main components, a background color-forming dispersed phase particle of 01 mm to 1 mm and a transparent dispersion medium capable of dispersing the dispersed phase particle in a particle state. And, the natural stone tone paint composition is provided with a specific composition.

First, there is a natural stone tone coating method which is one form of the present invention, wherein pattern color forming dispersed phase particles having a particle size distribution of a plurality of colors and having a particle size distribution of 1 mm to 15 mm are used.
A transparent dispersion medium capable of dispersing the dispersed phase particles in a particle state,
The natural stone tone paint composition as a main component is selected from those generally used as a multi-color paint for interior and exterior,
There is no particular limitation as long as it is a multicolor paint composition having such a constitution. Here, the particle size distribution is 0.001 mm
1 mm of the background color forming dispersed phase particles may not be blended when the undercoat layer for coating the natural stone-like coating composition is colored, but the undercoat layer is not colored. If
It is necessary to incorporate background color forming dispersed phase particles. this is,
This is because when the undercoat layer is colored, the undercoat layer can become the background color. The particle size distribution of the dispersed phase particles forming a pattern is 1 mm to 15 mm, but beyond this range, a mere multicolored pattern feeling, which is not a natural stone tone, can be expressed.
In particular, the particle size distribution of the pattern color forming dispersed phase particles is from 2 mm to
It is preferably 8 mm. Further, the particle size distribution of the dispersed phase particles forming the background color to be blended if necessary is 0.001 mm to 1 mm, but if the particle size distribution of the pattern forming particles and the background color forming particles exceeds the specified range, the pattern color It becomes impossible to distinguish the background colors, and similarly, only a mere multicolored pattern feeling is displayed. In particular, the particle size distribution of the background color forming dispersed phase particles is preferably 0.05 mm to 0.5 mm. When pattern-forming particles and background-color forming particles are blended at the same time, the volume of each particle in the entire paint is
The ratio of the pattern forming portion to the background color forming portion is 10: 1 to 1
0: 5 is desirable. In addition, the volume ratio of each color of the pattern forming portion to be mixed is preferably 1: 1 to 1:50. Two
In the case of a plurality of colors that are more than one color, it is desirable that any two colors have this relationship. Furthermore, a transparent dispersion medium capable of dispersing the dispersed phase particles, which is one of the main constituent components, in a particle state,
If the dispersion medium lacks transparency, it will overlap with the surface of the pattern forming part or the background color forming part and hinder the various colorful patterns, so it must be transparent when it becomes a substantially dry coating film. . However, it is possible to appropriately color the dispersion medium within the range in which the transparent feeling is maintained and the multicolored pattern feeling is not impaired. Such a natural stone tone paint composition crushes the pattern forming particles and the background color forming particles, which are optionally mixed, by the pressure applied to form a natural stone tone pattern. Therefore, it is necessary to coat with a coater that exerts a pressure such that the particles are crushed during painting, and a spray-type coater is desirable as such a coater. Particularly, a commonly used HS spray gun and a universal gun (for example, "SGS-2" manufactured by Meiji Machine Co., Ltd.) are more preferable.

The natural stone paint composition is not particularly limited as long as it has the above-mentioned constitution.
For example, in JP-A-54-87738, "A water-dispersible vinyl-based product obtained by emulsion-polymerizing a polymerizable vinyl monomer using a neutralized product of an acrylic resin or a neutralized product of a maleated polybutadiene-based polymer as an emulsifier A dispersion medium obtained by mixing a polyaminocarboxylic acid derivative with a synthetic resin emulsion and / or a colored synthetic resin emulsion coating, a dispersed phase comprising a colored water-based coating containing a mixture of a polymer and a neutralized product of the acrylic resin as a main component. A multicolored paint described as "Aqueous multicolored paint by stirring and dispersing in water to gel the surface of dispersed particles to form an aqueous dispersion", which corresponds to the above-mentioned provisions, JP-A-1-289877. (1) A multicolored paint in which a colorant particle which is incompatible with a dispersion medium of the paint and hollow particles which are not liquid impregnating properties are dispersedly contained in an aqueous paint. The multicolored paint according to claim 1, wherein the colorant particles are particles obtained by suspending and dispersing in water a colored paint that is incompatible with water. Examples of pattern paints include those that meet the above regulations. In particular, (a) an aqueous polyvinyl alcohol solution, (b) an organic solvent-based composition containing a vinyl-based synthetic resin having an acid value and a coloring material as essential components,
(c) A multicolored coating composition in which a plurality of different colors of an oil-in-water type suspension composition in which an organic titanate compound is dispersed is mixed is more desirable. By using the multicolor pattern coating composition, it is possible to form a coating film having weather resistance.

In particular, the maximum value of the color difference ΔE (hereinafter referred to as “ΔE”) in the CIE 1976 L ^* a ^* b ^* color space is 5.
When the pattern color forming dispersed phase particles consisting of a plurality of colors of 10 to 10 are used and the ΔE with each of the pattern color forming dispersed phase particles is applied to a coating base of a hue whose minimum value is 0.1 to 1. Of the natural stones, it is possible to create a granite-like texture. In addition, the maximum value of color difference ΔE is 5
Pattern color forming dispersed phase particles consisting of a plurality of colors of 10 to 10,
Of ΔE with each of the pattern color forming dispersed phase particles, a natural stone tone coating composition containing background color forming dispersed phase particles having a hue having a minimum value of 0.1 to 1 can be applied.
Similarly, it is possible to create a granite texture. The color difference ΔE in the CIE 1976 L ^* a ^* b ^* color space referred to here is the conversion of the color display method by the CIE-XYZ color system defined by the CIE (International Commission on Illumination) in 1931 and 1964. , A CI defined so that a certain distance (color difference) in the color system has a perceptual difference in almost every color region.
E 1976 L ^* a ^* b ^* Color difference in the color space. More specifically, it is a color difference represented by ΔE _ab ^* in a color space having a quantity L ^* a ^* b ^* defined by the following equation in an orthogonal coordinate system. (Handbook of Color Engineering, published November 25, 1989 2.8
Chapter see p190 ~ 211) L ^* = 116 of "color" ^{_{(Y / Y 0) 1/3 -16}} a * = 500 ^{_{[(X / X 0) 1/3 -}} (Y / Y 0) 1/3 ] b ^* = 200 [(Y / Y ₀ ) ¹ / ^3- (Z / Z ₀ ) ^1/3 ] (where X / X ₀ , Y / Y ₀ , Z / Z ₀ > 0.008
856, X, Y, Z are tristimulus values of the object color, X ₀ , Y ₀ ,
Z ₀ is the tristimulus value of the light source that illuminates the object color Y ₀ = 100
Is standardized in. ) The color difference between two object colors placed under a certain illumination is L ₁ ^* , a ₁ ^* , from the respective tristimulus values X ₁ , Y ₁ , Z ₁ , X ₂ , Y ₂ , Z _{2 according} to the above equation. Calculate b ₁ ^* and L ₂ ^* , a ₂ ^* , b ₂ ^* and use them to calculate the color difference by the following formula. ΔE _ab ^* = [(L ₁ ^* −L ₂ ^* ) ² + (a ₁ ^* −a ₂ ^* ) ² + (b ₁ ^*
−b ₂ ^* ) ² ] ^1/2 Actually, measure the color difference between two object colors using a color difference meter. As such a measuring device, for example, a color analyzer C-2000 (color analyzer) manufactured by Yamato Scientific Co., Ltd. can be used. The dispersed phase particles of a plurality of colors having a maximum ΔE value of 5 to 10 can be used. When a coating film is formed, a natural stone tone pattern portion is formed, and the smallest ΔE among the dispersed phase particles of a plurality of colors is 0.1 to 0.1.
A background color is formed when a coating base having a hue of 1 or a dispersed phase particle becomes a coating film. Here, the coating base can be used as it is if the hue of the base itself corresponds to the above-mentioned regulation, and if not, the hue can be adjusted by an arbitrary method such as painting or kneading. In this way, by setting the color difference ΔE between the pattern colors and between the pattern color and the background color to be within the range, it becomes possible to bring out a texture of particularly granite stone among natural stone tones. At this time, if the respective color difference ΔE exceeds the specified range, the general natural stone tone is obtained, which is far from the deep granite tone appearance.

Next, the undercoat layer for coating the natural stone tone paint composition is intended to have a volume feeling of about 1 mm to 30 mm on the substrate, more preferably 2 mm to 20 mm in consideration of economy. It is not particularly limited as long as it is formed by coating various materials with a trowel, roller, spraying, etc., for example, it is formed by the material specified in JIS A 6910 multi-layer finish coating material. Coatings, coatings made of materials specified in JIS A 6915 Thick finish coating materials and JIS A 6916 cement base conditioning coating materials, layers made of urethane foam that foams on site , A layer formed of lightweight mortar and the like.
The materials specified in JIS A 6910 multi-layer finish coating materials listed here are mainly composed of cement, a binder such as synthetic resin, and an aggregate, and have three layers and a thickness of about 1 to 5 mm. There is no particular limitation as long as it is a coating material that finishes in an uneven pattern,
As specific examples, cement-based multi-layer coating material (multi-layer coating material C), polymer cement-based multi-layer coating material (multi-layer coating material CE),
Silica-based multi-layer coating material (multi-layer coating material Si), synthetic resin emulsion-based multi-layer coating material (multi-layer coating material E), reaction-curable synthetic resin emulsion-based multi-layer coating material (multi-layer coating material RE) , All of which are classified as the synthetic resin solution-based multi-layer coating material (multi-layer coating material RS). Here, the JIS A 6910 multi-layer finish coating material is composed of three layers of a base coating material, a main material and a top coating material. The natural stone tone coating composition used in the coating method of the present invention is the third layer. That is, it can also be used as a top coat material. Therefore, a natural stone-like paint finish in which the natural stone-like paint composition is applied on the undercoat material, the main material, and the top coat material, and the natural stone-like paint composition is applied on the undercoat material and the main material. Both natural stone-like paint finish applied as top coat material is possible. Also, JI
SA 6915 Thick finish coating materials include:
If it is a thick finish coating material (hereinafter referred to as a thick coating material) which is a single layer and has a concavo-convex pattern with a thickness of about 4 to 10 mm, mainly composed of a binder such as cement and a synthetic resin emulsion and an aggregate. There is no particular limitation, and specific examples include all those classified into cement-based thick coating materials, siliceous thick coating materials, and synthetic resin emulsion-based thick coating materials. In addition, as materials specified in JIS A 6916 Cement-based undercoating coating materials, cement and inorganic-based fine aggregates are mainly used as the main raw materials, and cement-based undercoating coating materials mainly used for the interior and exterior finishing work of buildings are prepared. The material is not particularly limited as long as it is applied to a thickness of about 1 to 3 mm. Of course, there is no problem even if the coating material is applied before applying the natural stone tone paint composition onto the cement-based base conditioning coating material. Rather, it is preferable from the viewpoint of waterproofness.
Incidentally, in the present invention JIS A 6910 multi-layer finish coating material, JIS A
6915 Thick finish coating materials, JIS A 6916 Cement-based primer coating materials that satisfy all the qualities of these applicable standards are desirable, but these J
It is not necessary to satisfy all IS standards, and those having ordinary coating film performance required for each application can be used. Also, as the one formed by urethane foam that foams on site, apply a urethane foam resin,
It is not particularly limited as long as it can be foamed on site and molded into an arbitrary shape, for example, a main agent selected from polyether polyol, polyester polyol, sugar-based polyol, and a curing agent. A two-component reaction consisting of aromatic, aliphatic, or aliphatic organic isocyanates, organotins as catalysts, amines, etc., water as a foaming agent, low boiling point solvents, etc., and a silicone surfactant as a foam stabilizer. Examples include a curable type that forms a rigid urethane foam. In particular, Japanese Patent Application No. 6-
163278 The primer is applied to the surface of the building and civil engineering structure, or the base material layer such as the plate material used for the building civil engineering structure, which is indicated by "foam thickening makeup structure and foam thickening makeup method", and the primer is not dried. At the time of drying or after drying, a perforated mold is attached, and subsequently, a main component (A) consisting of water and a catalyst, a curing agent (B) consisting of polyisocyanate, and a filler (C) are attached to polyetherpolyol. By applying the mixed foaming urethane resin composition to the perforated part or the entire surface of the mold and foaming and hardening it, the formed surface is used as a coating base to form a three-dimensional coating. Rock-like finish is possible. Here, when the natural stone tone paint composition is applied onto such a foamed urethane foam, if there is a problem in adhesion, it is more preferable to apply the base paint and then finish. In addition, the lightweight mortar is not particularly limited as long as it is a lightweight mortar composition that can be applied once to a substrate to a thickness of about 1 mm to 30 mm. Specifically, for example, in cement and aggregate, a powder component including a filler, and a polymer cement made of a synthetic resin emulsion, the specific gravity is smaller than that of a general inorganic filler for weight reduction, and a cavity is formed inside. Examples thereof include those using lightweight aggregates such as hollow aggregates. Here, when applying the natural stone tone paint composition onto such a lightweight mortar, there is no problem even if finishing is performed after applying the coating material. Rather, it is more desirable from the viewpoint of waterproofness. By coating the natural stone-tone coating composition on a thick undercoat layer as described above, a natural stone-tone coated surface full of volume is obtained without using the aggregate-containing natural stone-tone paint. Can be formed at low cost. Further, as a method for further giving a sense of volume, a method of using a joint terrain molding frame and arbitrarily forming joints can be arbitrarily selected, and various finishing methods are possible. The formwork referred to here includes a punched formwork and joint bars.

Besides, it is also possible to apply the natural stone tone paint composition to the surface of the elastic coating film. The material for forming the elastic coating film at this time is not particularly limited as long as it is a paint capable of forming a general elastic coating film. By using the coating material that forms this elastic coating film, it is possible to follow the cracks to the body and also to impart waterproofness to the body, so that it can be widely applied. At this time, JIS K 5400 8.8 “Tensile strength and elongation”
A paint capable of forming an elastic coating film having a tensile strength of 30 N / cm ² or more, elongation rate of the coating film of 100% or more, and water permeability of 0.5 ml / 24 h or less specified in JIS A 6910 5.1 “Water permeability test”. Is preferred. Such elastic type coating materials include, for example, the waterproof type of JIS A 6910 multi-layer finish coating material and various coating materials specified in JIS A 6021 roof coating waterproof material, but these JIS are not always required. It is not necessary to satisfy all the standards, and one having the usual coating film performance required for each intended use can be used as long as it satisfies the numerical values specified in the present invention. When such an elastic coating film is used as the undercoat layer, a glass transition temperature (hereinafter, referred to as “Tg”) is used as the synthetic resin constituting the dispersed phase particles.
Say. ) Of 10 to 60 ° C., preferably 30 to 60 ° C.
By using one having a temperature of 40 ° C., it is possible to follow the underlying elastic coating film, and the stain resistance of the pattern color or background color forming portion can be improved. At this time, when Tg is lower than 10 ° C., tackiness occurs on the surface, which leads to a decrease in stain resistance.
If the temperature is higher than 0 ° C, the elastic coating film cannot be followed, and cracks occur in the portion where the coating film is formed by the dispersed phase particles. Further, as described above, even when the elastic coating film is used as the undercoat layer, the color difference ΔE of the pattern forming dispersed phase particles is adjusted to a specific value, and the color difference between the base and the pattern forming dispersed phase particles is adjusted. Color the undercoat layer of the elastic coating so that ΔE becomes a specific value, or
By incorporating background color forming dispersed phase particles having a specific value of the color difference ΔE between the background color and the pattern color into the natural stone tone paint composition, it is possible to obtain a texture of a natural stone tone, particularly a gray tone tone, while being elastic. It enables a completely new finish.

By the way, the coating method of the present invention is characterized by coating the natural stone tone paint composition on the undercoat layer, but in order to further improve weather resistance and stain resistance, a top coat material is further added. There is no problem with painting. The top coat is not particularly limited as long as it has a transparency that does not impair the natural stone tone when it becomes a substantially dry coating film. Examples include urethane-based topcoat materials, acrylic-silicone-based topcoat materials, and fluorine-based topcoat materials that are particularly excellent in weather resistance and stain resistance. Further, there is no problem even with a top coat material which is generally used.

The substrate to be coated by this natural stone tone coating method is not particularly limited, but for example, concrete surfaces such as wall surfaces, floor surfaces, and ceiling surfaces of concrete structures, ALC plates, PC plates, The surface of dry molded boards for construction such as slate boards, extruded boards, GRC boards, calcium silicate boards, gypsum boards, and various siding boards, and sheet building materials, etc., which have recently attracted attention as a dry coating method, have a wide range of applications. It is possible. In addition, this coating method can also be applied to surfaces that have already been painted with paint, such as the surface of an old paint film when renovating a building. After the adjustment, a coating film similar to that described above may be appropriately formed.

Next, there is another form of the present invention, which is a natural stone tone paint composition, showing a particularly preferable form and composition among the paints capable of giving a natural stone tone finish. It is a thing. This is because pattern color forming dispersed phase particles having a particle size distribution of plural colors of 1 mm to 15 mm, background color forming dispersed phase particles having a particle size distribution of 0.001 mm to 1 mm, and the dispersed phase particles dispersed in a particle state. A possible transparent dispersion medium as a main constituent, and the dispersion phase and the dispersion medium are (a) an aqueous solution of polyvinyl alcohol, (b) an organic solvent system containing a vinyl synthetic resin having an acid value and a coloring material as essential components. The composition, (c) is a natural stone tone paint composition in which a plurality of different colors of an oil-in-water type suspension composition in which an organic titanate compound is dispersed are mixed. Here, the particle size distribution of the dispersed phase particles forming the pattern is 1 mm to 15 mm, and the particle size distribution of the dispersed phase particles forming the background color is 0.001 mm to 1 mm, but the pattern forming particles and the background color forming When the particle size of the particles exceeds the specified range, it becomes impossible to distinguish between the pattern color and the background color, and only a mere multicolored pattern feeling appears, and the natural stone tone texture disappears. In particular, it is preferable that the particle size distribution of the pattern color forming dispersed phase particles is 2 mm to 8 mm, and the background color forming dispersed phase particles is 0.05 mm to 0.5 mm. The volume of each particle in the entire coating material is preferably 10: 1 to 10: 5 in terms of the ratio of the pattern forming portion and the background color forming portion. Furthermore, the volume ratio of each color of the pattern forming portion to be mixed is preferably 1: 1 to 1:50, and in the case of a plurality of two or more colors, it is desirable that any two colors have this relationship. In addition, the transparent dispersion medium capable of dispersing the dispersed phase particles, which is one of the main components, in a particle state is overlapped with the surface of the pattern forming portion or the background color forming portion when the transparency is lacking, resulting in a multi-angled pattern. Therefore, it is necessary to be transparent when a dried coating film is formed. However, it is possible to appropriately color the dispersion medium within the range in which the transparent feeling is maintained and the multicolored pattern feeling is not impaired. Further, the coating composition, (a) polyvinyl alcohol aqueous solution, (b) an organic solvent-based composition containing a vinyl-based synthetic resin having an acid value and a coloring material as essential components, (c) an organic titanate compound dispersed therein. A different color of the oil-in-water type suspension composition, which is a mixture of a plurality of paints, has excellent storage stability.
A coating film excellent in weather resistance can be formed. In such a natural stone tone coating composition, the pattern forming particles and the background color forming particles are crushed by the pressure applied to form a smooth natural stone tone pattern. Therefore, it is necessary to coat with a coater that exerts a pressure such that the particles are crushed during painting, and a spray-type coater is desirable as such a coater. Especially commonly used HS spray guns, universal guns (eg
"SGS-2" manufactured by Meiji Machine Co., Ltd.) is more desirable.

In addition, in the natural stone tone paint composition, in particular, the minimum of ΔE of the pattern color forming dispersed phase particles consisting of a plurality of colors having the maximum value of color difference ΔE of 5 to 10 and ΔE of each of the pattern forming dispersed phase particles. By making the background color-forming dispersed phase particles having a value of 0.1 to 1 essential, it is possible to form a granite-like painted surface among natural stones. The reason for this is as described above.

[0015]

【Example】

(Reference Example 1) Using the raw materials in Table 1, based on the formulation example in Table 2, an organic solvent-based composition to be a dispersed phase was added while stirring the dispersion medium at an impeller peripheral speed of 1.0 m / SEC. did.
As a result, a suspension type coating composition having a dispersed phase particle size distribution of 2 to 6.0 mm and an average particle size of 3.5 mm was obtained. This suspension type coating composition had L ^* = 77.6, a ^* =-0.1 and b ^* = 4.0 in the CIE 1976 L ^* a ^* b ^* color space. (Reference Example 2) An organic solvent composition as a dispersed phase was obtained in the same manner as in Reference Example 1 based on the compounding examples in Table 2 using the raw materials in Table 1. This organic solvent composition has L ^* = 69.6, a ^* =
It was -0.2 and b ^* = 4.9. (Reference Example 3) Using the raw materials of Table 1, based on the formulation example of Table 2, an organic solvent composition to be a dispersed phase was obtained in the same manner as in Reference Example 1. This organic solvent composition has L ^* = 63.7, a ^* =
It was -0.3 and b ^* = 5.5. (Reference Example 4) Using the raw materials of Table 1, based on the formulation example of Table 2, the organic solvent composition as the dispersed phase was blended while stirring the impeller in the dispersion medium at a peripheral speed of 2.5 m / SEC. did.
As a result, the particle size distribution of the dispersed phase is 0.03 to 0.5 mm.
Thus, a suspension type coating composition having an average particle diameter of 0.1 mm was obtained. This suspension type coating composition had L ^* = 77.8 and a ^* = − 0.
1, b ^* = 4.1. (Reference Example 5) Using the raw materials of Table 1, based on the formulation example of Table 2, compounding an organic solvent composition to be a dispersed phase while stirring at a peripheral speed of the impeller in the dispersion medium of 3.5 m / SEC. did.
As a result, the particle size distribution of the dispersed phase is 0.001-0.1 mm
Thus, a suspension type coating composition having an average particle diameter of 0.05 mm was obtained.
This suspension type coating composition has L ^* = 77.6, a ^* =-
0.1 and b ^* = 4.0.

(Compounding Example 1) A multi-color paint was prepared with the composition as shown in Table 3. At this time, the volume ratio of each color of the pattern color forming portion was 1: 1. (Compounding Example 2) A multicolored paint was manufactured with the formulation shown in Table 3. At this time, the volume ratio of the pattern color forming portion to the background color forming portion was 10: 4.3, and the volume ratio of each color of the pattern color forming portion was 1: 1. (Compounding Example 3) A multi-color paint was manufactured with the composition as shown in Table 3. At this time, the volume ratio of each color of the pattern color forming portion is 1:
It was 1.3. (Formulation Example 4) A multi-color paint was produced with the formulation shown in Table 3. At this time, the volume ratio of the pattern color forming portion and the background color forming portion was 10: 4.3, and the volume ratio of each color of the pattern color forming portion was 1: 1. (Compounding example 5) A multicolored paint was manufactured with the composition as shown in Table 3. At this time, the volume ratio of the pattern color forming portion and the background color forming portion was 10: 4.3, and the volume ratio of each color of the pattern color forming portion was 1.5: 1: 1. (Formulation Example 6) A multi-color paint was produced with the formulation shown in Table 3.

(Example 1) "Colored binder" manufactured by SK Kaken Co., Ltd. was applied to ^two 900 x 900 x 3 mm slate plates at a required amount of 0.20 Kg / m ² . Temperature 20
After drying for 3 hours in a drying room (hereinafter referred to as "standard condition") with a temperature of ± 1 ° C and relative humidity of 65 ± 5%, a topographical molding frame was attached, and SK Kaken Co., Ltd. "Shipolok" (JIS A 69
15 Exterior thick coating material E approved product) was applied to a thickness of 5 mm. After being dried for 24 hours in a standard state, the required amount of 0.40 Kg was obtained using the multi-color paint composition HS gun of Formulation Example 1.
/ M ² , tip diameter 5 mm, air pressure 200 to 300 kPa
Was applied under the conditions of. After drying for 16 hours in the standard state, the eye topography molding frame was removed, and SK Kaken Co., Ltd. "Urethane Top" (acrylic urethane top coat material) was applied at the required amount of 0.20 kg / m ² and tested. The body was made.
The following test was performed on this test body. <Uneven coating test> With respect to the finished test body, uneven coating was visually confirmed. The results are shown in Table 5 as ◯: No coating unevenness, Δ: Some coating unevenness, X: Large coating unevenness. <Designability test> The finished test body was visually compared with natural stone to determine whether or not they had a similar design feeling.
The results are shown in Table 5, with ◯: very close to natural stone, Δ: similar to natural stone, but somewhat artificial. <Volume test> 9
15 parts by weight of acrylic styrene copolymer emulsion on a slate plate of 00 × 900 × 3 mm and a particle size of 0.1 to 5.0.
50 parts by weight of a different colored silica sand mixture having a particle size of 0.5-
Natural stone coating material produced by mixing 15 parts by weight of 1.0 mm cold water stone, 10 parts by weight of silica sand having a particle size of 0.1 to 0.5 mm, 3 parts by weight of various additives, and 10 parts by weight of water. It was visually judged whether or not the feeling of volume was close to that of the one coated with the one-step joint finishing method. The results are shown in Table 5 as follows: ◎: Very excellent volume feeling ○: There is a volume feeling Δ: A little volume feeling is observed ×: No volume feeling is seen. <Staining resistance test> One of the finished test pieces was subjected to an outdoor exposure test, and the level of contamination was compared with the other one that was not exposed after 6 months. The results are shown in Table 5 as follows: ⊚: Very good ∘: Good Δ: Stain is conspicuous x: Stain is noticeable (Example 2) As shown in Table 4, "SK" manufactured by SK Kaken Co., Ltd. was placed on two 900 x 900 x 3 mm slate plates.
"Clear sealer" was applied at a required amount of 0.10 Kg / m ² . After being dried for 2 hours in a standard state, "RENALAC" (JIS A 6910 multi-layer coating material E display permission product) manufactured by SK Kaken Co., Ltd. was applied to the yuzu skin to a thickness of about 2 mm. After being dried for 24 hours in a standard state, the multicolored paint of Formulation Example 2 was applied in the same manner as in Example 1 using an HS gun. After drying in a standard state for 16 hours, "Urethane Top" (acrylic urethane type top coat material) manufactured by SK Kaken Co., Ltd. was applied in the same manner as in Example 1 to prepare a test body. The completed test piece was tested in the same manner as in Example 1, and the results are shown in Table 5. (Example 3) As shown in Table 4, "SK" manufactured by SK Kaken Co., Ltd. was attached to two 900 x 900 x 3 mm slate plates.
"Clear sealer" was applied at a required amount of 0.10 Kg / m ² . After drying for 2 hours in the standard state, SK Kaken Co., Ltd. "ceramitite tile" (JIS A 6910 multi-layer coating material Si display permission product) is applied to the yuzu skin to a thickness of 1.5 mm. did. After drying in standard condition for 16 hours,
SK Kaken Co., Ltd. "Please Coat" (acrylic resin emulsion paint) 0.30 kg / m ²
Was applied. After being dried in a standard state for 24 hours, the multicolored paint of Formulation Example 3 was applied using an HS gun in the same manner as in Example 1 to prepare a test body. The finished test body was tested in the same manner as in Example 1, and the results are shown in Table 5. (Example 4) As shown in Table 4, "KAKEN Cement Filler" (JIS A 6916 cement-based ground control coating material display permission product) manufactured by SK Kaken Co., Ltd. was applied to two 900 x 900 x 3 mm slate plates. Iron coated to a thickness of 2 mm. After drying in a standard state for 7 days, "Biofine" (JIS K 5633 Class 1 approved product) manufactured by SK Kaken Co., Ltd. was applied at a required amount of 0.30 Kg / m ² . After drying for 3 hours in the standard state, the multicolored paint of Formulation Example 4 was applied using an HS gun in the same manner as in Example 1 to prepare a test body. The finished test body was tested in the same manner as in Example 1, and the results are shown in Table 5. (Example 5) As shown in Table 4, "Mortecto" (lightweight pre-mixed mortar) manufactured by SK Kaken Co., Ltd. was applied to two 900 x 900 x 3 mm slate plates by iron coating with a thickness of 10 mm. After drying for 10 days in the standard state, "Biofine" (JIS K 5633 Class 1 approved product) manufactured by SK Kaken Co., Ltd. was applied at a required amount of 0.30 Kg / m ² .
After drying for 3 hours in the standard state, apply the multicolored paint of formulation example 5 to H
Application was performed in the same manner as in Example 1 using an S gun. After drying for 16 hours under standard conditions, the required amount of "Fussolon Clear" (fluorine top coat material) manufactured by SK Kaken Co., Ltd. 0.2
A test body was prepared by coating at 0 kg / m ² . The finished test body was tested in the same manner as in Example 1, and the results are shown in Table 5. (Example 6) As shown in Table 4, "SK" manufactured by SK Kaken Co., Ltd. was placed on two 900 x 900 x 3 mm slate plates.
Art Sealer "was applied at a required amount of 0.20 Kg / m ² . After drying for 1 hour in a standard state, a frame for molding eye topography was attached, and "SK Mall Rock" (urethane foam) manufactured by SK Kaken Co., Ltd. was applied by trowel coating to a thickness of 20 mm after foaming. Immediately remove the eye terrain molding frame,
After drying in a standard state for 24 hours, "SK Art Sealer" manufactured by SK Kaken Co., Ltd. was applied at a required amount of 0.15 Kg / m ² . After drying for 1 hour in the standard state, the multicolored paint of Formulation Example 5 was applied in the same manner as in Example 1 using an HS gun.
After drying in a standard state for 16 hours, "SK Hard Clean" (acrylic silicon-based top coat material) manufactured by SK Kaken Co., Ltd. was applied at a required amount of 0.15 Kg / m ² to prepare a test piece. The finished test body was tested in the same manner as in Example 1, and the results are shown in Table 5.

(Comparative Example 1) Two slate plates of 900 × 900 × 3 mm were coated with "RENACOAT" manufactured by SK Kaken Co., Ltd.
Was adjusted to A color, B color and C color, respectively. 20% of C color
It was diluted and then coated on the entire surface with an HS gun under the conditions of a required amount of 0.25 kg / m ² , an air pressure of 500 kPa, and a tip diameter of 3 mm. After being dried for 3 hours in the standard state, the A-color paint diluted with 8% of the A-color was applied with an HS gun under the conditions of an air pressure of 300 kPa and a tip diameter of 4 mm so that the A-color became a discontinuous bead pattern. After drying for 3 hours in the standard state, the B color paint diluted by the same operation as the A color was applied under the same conditions. The formed coating film has a portion in which the discontinuous beaded pattern of A color is hidden by the discontinuous beaded pattern of B color, and the discontinuous beaded pattern itself is overlapped with each of A color and B color, There was a part that was continuous. This test body was tested in the same manner as in Example 1, and the results are shown in Table 5. (Comparative Example 2) The C-color paint used in Comparative Example 1 was similarly applied to two 900 x 900 x 3 mm slate plates. After drying for 3 hours in the standard state, the A-color paint and the B-color paint used in Comparative Example 1 were put in separate HS guns, respectively.
With the S gun in the same direction at the same time and under the same conditions as in Comparative Example 1,
Each was applied so that a discontinuous bead pattern could be formed.
In the formed coating film, as in Comparative Example 1, the color on the side following after the coating direction overlaps the color on the front side, and the discontinuous bead pattern is hidden. There was a part. The test is conducted on this test body in the same manner as in Example 1,
The results are shown in Table 5. (Comparative Example 3) A test body was prepared in the same manner as in Example 2 except that Formulation Example 6 was used for the multicolored paint. The finished test piece had a voluminous feel, but had a mere fine multicolored feel. This test body was tested in the same manner as in Example 1, and the results are shown in Table 5. (Comparative Example 4) 15 parts by weight of an acrylic styrene copolymer emulsion and 5 different colored silica sand mixtures having a particle size of 0.1 to 5.0 mm were applied to two 900 × 900 × 3 mm slate plates.
0 parts by weight, 15 parts by weight of cold water stone with a particle size of 0.5 to 1.0 mm,
10 parts by weight of silica sand having a particle size of 0.1 to 0.5 mm, 3 parts by weight of various additives, and 10 parts by weight of water are applied to apply a natural stone tone coating material having a thickness of 3 mm, A test body was prepared. The completed test body is tested in the same manner as in Example 1. The results are shown in Table 5.

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

(Embodiment 7) An elastic flat paint (acrylic emulsion paint, pigment volume concentration: 13.5, tensile strength: 35 N / on a slate plate of 300 × 210 × 3 mm.
cm ² , elongation rate: 150%, water permeation rate: 0.2 ml / 24 h) was applied over the entire surface with a spray gun at a required amount of 0.8 kg / m ² . After drying for 24 hours in a standard state, the multicolored paint of Formulation Example 1 was applied in the same manner as in Example 1 using an HS gun to prepare a test body. The completed test body,
A hot and cold repeated test was conducted by the following method. <Hot and cold repeated test> According to JIS A 6910 5.9 Hot and cold repeated test, the test piece was immersed in water at 20 ± 2 ° C for 18 hours and immediately cooled in a constant temperature bath at -20 ± 3 ° C for 3 hours. Then, it is heated for 3 hours in another thermostat of 50 ± 3 ° C. After repeating this cycle for 24 hours as one cycle for 10 cycles, it was allowed to stand for 2 hours in the standard state, and the state of the coating film surface was confirmed. As a result, not only the elastic flat paint as the undercoat but also the coating film of the multicolored paint forming the discontinuous bead-like pattern was not cracked.

(Embodiment 8) L ^* = 77.
4, a ^* =-0.7, b ^* = 3.6, a normal acrylic flat paint toned with a spray of 0.3 Kg / m
^A base color of 1 was obtained by coating and drying at a ratio of ² . Next, when a multicolor paint of Formulation Example 1 was produced, the maximum value of ΔE between the pattern color forming dispersed phase particles was 8.1, and the minimum value of ΔE between the pattern color forming dispersed phase particles and the base color 1 was , 0.7. The following tests were conducted using this multicolored paint. The results are shown in Table 8. <Uneven coating test> This multicolored paint was applied to the above-mentioned coated slate plate using an HS gun under the conditions of a tip diameter of 5 mm and an air pressure of 200 to 300 kPa, and the uneven coating was visually confirmed. The results are indicated by ◯: no coating unevenness, Δ: some coating unevenness, and x: large coating unevenness. <Designability> The natural stone pattern coating film formed by the multicolor pattern paint applied to the slate plate was compared with natural granite to visually judge whether the design feeling was close to natural. The results are represented by ◯: very close, Δ: similar, x: looks artificial. <Staining resistance> A slate plate coated with the above-mentioned multicolored paint was subjected to an outdoor exposure test, and compared with one not exposed to the level of pollution after half a year. The results are indicated by ◯: good Δ: stain is noticeable ×: stain is noticeable (Example 9) When a multicolored paint of formulation example 2 was produced, the maximum value of ΔE between the pattern color forming dispersed phase particles was 8.
1, and the minimum value of ΔE between the pattern color forming dispersed phase particles and the background color forming dispersed phase particles was 0.2. Using the HS gun, this multicolored paint is used with a tip diameter of 5 mm,
When it was applied to a slate plate under the condition of air pressure of 200 to 300 kPa, the dispersed phase particles of the suspension type coating composition of Reference Example 4 became the background color, and the suspension type coating composition of Reference Example 1 and Reference Example 2 The dispersed phase particles formed a paint film that was a pattern color. The coating film thus formed was tested in the same manner as in Example 8. The results are shown in Table 8. (Example 10) When the multicolored paint of formulation example 4 was produced, the maximum value of ΔE between the pattern color forming dispersed phase particles was 13.
9. The minimum value of ΔE between the pattern color forming dispersed phase particles and the background color forming dispersed phase particles was 0.2. When this multicolored paint was applied to a slate plate using an HS gun under the conditions of a tip diameter of 5 mm and an air pressure of 200 to 300 kPa, the dispersed phase particles of the suspension type paint composition of Reference Example 4 became a background color, The dispersed phase particles of each suspension type coating composition of Reference Example 1 and Reference Example 3 formed a coating film having a pattern color. The coating film thus formed was tested in the same manner as in Example 8. The results are shown in Table 8. (Example 11) When a multicolored paint of Formulation Example 5 was produced, the maximum value of ΔE between the pattern color forming dispersed phase particles was 13.
9. The minimum value of ΔE between the pattern color forming dispersed phase particles and the background color forming dispersed phase particles was 0.2. When this multicolored paint was applied to a slate plate using an HS gun under the conditions of a tip diameter of 5 mm and an air pressure of 200 to 300 kPa, the dispersed phase particles of the suspension type paint composition of Reference Example 4 became a background color, The dispersed phase particles of each suspension type coating composition of Reference Examples 1, 2 and 3 formed a coating film having a pattern color. The coating film thus formed was tested in the same manner as in Example 8. The results are shown in Table 8.

Comparative Example 5 SK Kaken Co., Ltd.
“Lenacoat” was colored in D (L ^* = 78.2, a ^* = 0.
2, b ^* = 4.3), E color (L ^* = 70.1, a ^* =-)
0.3, b ^* = 5.2), base color 3 (L ^* = 77.7,
a ^* =-0.7, b ^* = 4.1).
At this time, ΔE between the D color and the E color is 8.2, and the base color 3 and D
The smallest value of ΔE of color or E color was 1.0.
Next, dilute the base color 3 paint by 20% on the slate plate and add H
S gun applied 0.25Kg / m ² , air pressure 500kP
a, the entire surface was coated under the condition that the tip diameter was 3 mm. After the undercoat was dried, a D-color paint in which the D-color was diluted by 8% was applied with an HS gun under the conditions of an air pressure of 300 kPa and a tip diameter of 4 mm so that the D-color became a discontinuous bead pattern. After the D color was dried, the E color paint diluted by the same operation as the D color was applied under the same conditions and dried. The formed coating film has a portion in which the discontinuous beaded pattern of D color is hidden by the discontinuous beaded pattern of E color, and further, the discontinuous beaded pattern itself is overlapped with each of D color and E color and is continuous. There was a part that had turned. The coating film was tested in the same manner as in Example 8 and the results are shown in Table 8. (Comparative Example 6) The undercoat color 3 paint used in Comparative Example 5 was similarly applied to a slate plate and dried. Then, the D color paint and the E color paint used in Comparative Example 3 were put in separate HS guns, respectively, and the HS guns were simultaneously formed in the same direction and under the same conditions as in Comparative Example 5 to form discontinuous bead patterns. It was applied so that it could be formed. In the coating film formed after drying, as in Comparative Example 5, the color on the side following after the coating direction overlaps the color on the front side, and the discontinuous bead pattern is hidden. There was a part. The coating film was tested in the same manner as in Example 8 and the results are shown in Table 8. (Comparative Example 7) 15 parts by weight of an acrylic styrene copolymer emulsion, 50 parts by weight of a different colored silica sand mixture having a particle size of 0.1 to 5.0 mm, and Kousui stone 15 having a particle size of 0.5 to 1.0 mm.
10 parts by weight of silica sand having a particle size of 0.1 to 0.5 mm, 3 parts by weight of various additives, and 10 parts by weight of water are mixed to prepare a natural stone coating material of 3 mm. The test was conducted in the same manner as in Example 8 after applying the coating in a thickness and drying. The results are shown in Table 8.

(Example 12) Elastic flat coating material (acrylic emulsion type coating material, pigment volume concentration: 13.5, tensile strength: 35 N / cm ² , elongation rate: 150%, water permeability:
0.2 ml / 24 h) L ^* = 77.2, a ^* = − 0.
3 、 b ^* = 3.6 toned, sprayed on a slate plate with a coating amount of 0.8 kg / m ^{2 on} the entire surface and dried,
The base color is 2. Using the HS gun, the multi-color paint of Formulation Example 3 was used, the tip diameter was 5 mm, and the air pressure was 200 to 300 k.
It was applied under the condition of Pa and dried. <Hot and cold repeated test> According to JIS A 6910 5.9 Hot and cold repeated test, the test piece was immersed in water at 20 ± 2 ° C for 18 hours and immediately cooled in a constant temperature bath at -20 ± 3 ° C for 3 hours. Then, it is heated for 3 hours in another thermostat of 50 ± 3 ° C. After repeating this cycle for 24 hours as one cycle and 10 cycles, it was allowed to stand in the test chamber for 2 hours and the state of the coating film surface was confirmed. As a result, not only the elastic flat paint as the undercoat but also the coating film of the multicolored paint forming the discontinuous bead-like pattern was not cracked. Table 9 shows the color difference ΔE between each reference example and the base color.

[Table 6]

[Table 7]

[Table 8]

[Table 9]

[0023]

INDUSTRIAL APPLICABILITY According to the present invention, by applying a multicolored paint containing a dispersed phase particle having a specific particle diameter as a main constituent to a coating base, the conventional paint containing aggregate is not used. It is also possible to produce a natural stone tone texture, and by forming a specific coating base and giving the base a certain thickness, a natural stone-like laminated coating film full of volume can be formed at low cost. There is an effect that can be. Further, in a multicolor pattern paint produced from a suspension type coating composition in which L ^* value, a ^* value and b ^* value are adjusted in advance, the maximum value of the color difference ΔE between the pattern forming dispersed phases and the pattern forming dispersed phase By specifying the minimum value of the color difference ΔE of the background color forming dispersed phase or the background color for each of the above, it is as if it is a granite without requiring the special skill of a coating machine or a skilled coating expert. It is possible to perform a stone material-like painting with a deep design feeling. In addition, since the coating film formed from the coating composition of the present invention forms a relatively smooth surface, it is difficult for contaminants to adhere to it, and even if it becomes dirty, it can be wiped off.

Claims (18)

[Claims] 1. A particle size distribution consisting of a plurality of colors is 1 mm to 15 mm.
A pattern color forming dispersed phase particles and a transparent dispersion medium in which the dispersed phase particles can be dispersed in a particle state, a natural stone tone paint composition having a main constituent, is coated on the undercoat layer. Natural stone paint method. 2. A particle size distribution consisting of a plurality of colors is 1 mm to 15 mm.
Pattern color forming dispersed phase particles with a particle size distribution of 0.001 mm
A background color forming dispersed phase particle of ˜1 mm and a natural stone tone paint composition having a transparent dispersion medium capable of dispersing the dispersed phase particle in a particle state as a main component are coated on the undercoat layer. Characteristic natural stone tone painting method. 3. The natural stone tone coating method according to claim 1, wherein the undercoat layer is formed of a material specified in JIS A 6910 multi-layer finish coating material. 4. The undercoat layer is a JIS A 6915 thick finish coating material.
The natural stone-tone coating method according to claim 1 or 2, wherein the natural stone-tone coating method is formed of the material defined in (3). 5. The natural stone-tone coating method according to claim 1, wherein the undercoat layer is formed of a material specified in JIS A 6916 Cement-based base conditioning coating material. 6. The natural stone tone coating method according to claim 1, wherein the undercoat layer is formed of urethane foam. 7. The natural stone tone coating method according to claim 1, wherein the undercoat layer is formed of lightweight mortar. 8. A pattern having a particle size distribution of 1 mm to 15 mm, which is composed of a plurality of colors having a maximum color difference ΔE (hereinafter referred to as “ΔE”) of 5 to 10 in the CIE 1976 L ^* a ^* b ^* color space. Color-forming dispersed phase particles, and a natural stone tone paint composition having a transparent dispersion medium capable of dispersing the pattern-color forming dispersed-phase particles in a particle state as a main constituent, with each of the pattern-color forming dispersed phase particles A natural stone tone coating method, which comprises coating on a coating base whose hue is a minimum value of 0.1 to 1 in ΔE. 9. A pattern having a particle size distribution of 1 mm to 15 mm, which is composed of a plurality of colors having a maximum color difference ΔE (hereinafter referred to as “ΔE”) of 5 to 10 in the CIE 1976 L ^* a ^* b ^* color space. Background color forming dispersed particles having a particle size distribution of 0.001 mm to 1 mm having a minimum value of 0.1 to 1 among ΔE of the color forming dispersed phase particles and each of the pattern color forming dispersed phase particles, and the pattern. A natural stone-like coating method, which comprises applying a natural stone-like coating composition containing a transparent dispersion medium capable of dispersing color-forming dispersed phase particles in a particle state as a main component to a coating base. 10. A natural stone tone paint composition comprising (a) an aqueous solution of polyvinyl alcohol, (b) an organic solvent-based composition containing, as essential components, a vinyl synthetic resin having an acid value and a coloring material, (c) an organic compound. The coating method according to any one of claims 1 to 9, wherein a plurality of different colors of the oil-in-water type suspension composition in which the titanate compound is dispersed are mixed. 11. A glass transition temperature (hereinafter, referred to as "Tg") of a constituent resin having a plurality of colors is 10 ° C to 60 ° C.
A natural stone tone paint composition having as main components the pattern color forming dispersed phase particles having a particle size distribution of 1 mm to 15 mm and a transparent dispersion medium capable of dispersing the pattern color forming dispersed phase particles in a particle state. Is applied to the surface of an elastic coating film having a tensile strength of 30 N / cm ² or more, an elongation of the coating film of 100% or more, and a water permeability of 0.5 ml / 24 h or less. 12. The maximum value of the color difference ΔE (hereinafter referred to as “ΔE”) in the CIE 1976 L ^* a ^* b ^* color space is 5 to 10.
The pattern color forming dispersed phase particles having a plurality of colors are used, and Δ with each of the pattern color forming dispersed phase particles is used.
The coating method according to claim 11, wherein the coating is applied to the surface of the elastic coating film having a hue of E having a minimum value of 0.1 to 1. 13. A pattern color forming dispersed phase particle having a plurality of colors and having a glass transition temperature (hereinafter referred to as “Tg”) of its constituent resin of 10 ° C. to 60 ° C. and a particle size distribution of 1 mm to 15 mm. Background color forming dispersed phase particles having a particle size distribution of 0.001 mm to 1 mm in which Tg of the constituent resin is 10 ° C. to 60 ° C., and a transparent dispersion medium capable of dispersing the dispersed phase particles in a particle state The natural stone tone paint composition, which has a tensile strength of 3
A natural stone-like coating method characterized by coating an elastic coating film surface having an elongation of 0 N / cm ² or more, an elongation rate of 100% or more, and a water permeability of 0.5 ml / 24 h or less. 14. The maximum value of the color difference ΔE (hereinafter referred to as “ΔE”) in the CIE 1976 L ^* a ^* b ^* color space is 5 to 10.
The background color forming dispersed phase particles having a hue of which the minimum value is 0.1 to 1 in ΔE of the pattern color forming dispersed phase particles and ΔE of each of the pattern color forming dispersed phase particles are used. The coating method according to claim 13, wherein 15. A natural stone tone paint composition comprising: (a) an aqueous solution of polyvinyl alcohol, (b) an organic solvent-based composition containing, as essential components, a vinyl-based synthetic resin having an acid value and a coloring material, (c) an organic compound. The coating method according to any one of claims 11 to 14, wherein a plurality of different colors of the oil-in-water type suspension composition in which the titanate compound is dispersed are mixed. 16. A particle size distribution consisting of a plurality of colors is 1 mm to 15
mm pattern color forming dispersed phase particles and particle size distribution 0.001
A background color forming dispersed phase particle having a size of mm to 1 mm, and a natural stone tone paint composition having a transparent dispersion medium capable of dispersing the dispersed phase particle in a particle state as a main constituent, wherein the dispersed phase and the dispersion medium are
(a) A polyvinyl alcohol aqueous solution, (b) an organic solvent-based composition containing a vinyl synthetic resin having an acid value and a coloring material as essential components, (c) an oil-in-water suspension in which an organic titanate compound is dispersed. A natural stone tone paint composition, characterized in that a plurality of different colors of the composition are mixed. 17. The maximum value of the color difference ΔE (hereinafter referred to as “ΔE”) in the CIE 1976 L ^* a ^* b ^* color space is 5 to 10.
Of a plurality of colors having a particle diameter distribution of 1 mm to 15 mm and ΔE of each of the pattern color forming dispersed phase particles and each of the pattern color forming dispersed phase particles having a minimum value of 0.1 to 1 A natural stone tone paint composition comprising as background color-forming disperse phase particles of 0.001 mm to 1 mm and a transparent dispersion medium capable of dispersing the disperse phase particles in a particle state. 18. A dispersion phase and a dispersion medium, (a) an aqueous solution of polyvinyl alcohol, (b) an organic solvent-based composition containing, as essential components, a vinyl-based synthetic resin having an acid value and a coloring material, (c) an organic titanate. The natural stone tone paint composition according to claim 17, wherein a plurality of different colors of the oil-in-water type suspension composition in which the compound is dispersed are mixed.