JP7091144B2 - How to form a decorative coating surface - Google Patents

Description

The present invention relates to a novel method for forming a decorative coating surface.

Conventionally, decorative coatings having various patterns have been formed on the wall surfaces of buildings, civil engineering structures, and the like. An example of such a decorative coating is a decorative coating in which a plurality of covering materials are partially applied to form a pattern.

For example, Patent Document 1 describes a method of applying an undercoat paint to the entire surface and patterning a paint (patterning paint) having a darker color than the undercoat paint before the undercoat paint is dried. However, in Patent Document 1, since the patterning paint is applied before the undercoat paint dries, the undercoat paint and the patterning paint are likely to be mixed on the surface to be coated, and the contrast such as color and texture may be diminished. There is.

Japanese Unexamined Patent Publication No. 2008-266911

The present invention has been made in view of such problems, and an object of the present invention is to provide a method for forming a decorative coating surface having contrast and having high aesthetics.

In order to solve such a problem, the present inventor, as a result of diligent studies, came up with a method for forming a decorative coating surface in which a plurality of specific covering materials are applied to the surface to be coated by a specific method, and the present invention is developed. It came to be completed.

That is, the present invention has the following features.
1. 1. A method for forming a decorative coating surface in which at least two or more colored regions are mixed.
Using at least two kinds of dressings having a color difference (ΔE) of 3 or more,
All of the above-mentioned covering materials have a heating residue of 25% by weight or more.
On the surface to be coated,
Including the first step of applying the first covering material and the second step of applying the second covering material.
The heating residue of the second coating material is higher than that of the first coating material, and the difference is 1 to 30% by weight.
A method for forming a decorative coating surface, which comprises applying the second coating material discontinuously using a spongy material after the first coating material is in a non-fluid state.
2. 2. 1. The first coating material is applied to the entire surface. The method for forming a decorative coating surface according to.
3. 3. 1. The first coating material is discontinuously applied to the surface to be coated by using a spongy material. The method for forming a decorative coating surface according to.

The present invention uses at least two kinds of coating materials having a color difference (ΔE) of 3 or more, and all of the above-mentioned covering materials have a heating residue of 25% by weight or more, and the above-mentioned two kinds of coating materials are applied to the surface to be coated. It includes a step of applying the covering materials in order, and by applying the covering material of the next step discontinuously after the previously applied covering material becomes non-fluid in the previous step, at least 2 It forms a decorative dressing surface in which more than seeds of colored regions are mixed, and it is possible to obtain a decorative dressing surface having contrast and having high aesthetics.

FIG. 1 is a front view showing an example of a decorative coating surface formed by the present invention. FIG. 2 is a cross-sectional view showing an example of a pressing tool that can be used in the present invention. FIG. 3 is a cross-sectional view showing an example of a roller that can be used in the present invention. FIG. 4 is a front view showing an example of the decorative coating surface formed by the present invention.

1. 1. Decorative coating surface 1a. Colored area A
1b. Colored area B
1c. Colored area C
2. 2. Pressers 2a to 2e. Sponge material 2f. Height direction 3. Rollers 3a to 3e. Sponge material 3f. Cylinder outer peripheral surface 3 g. Cylinder outer diameter direction

Hereinafter, embodiments for carrying out the present invention will be described.

The present invention is a method for forming a decorative coating surface in which at least two or more kinds of colored regions are mixed, and at least two kinds of covering materials having a color difference (ΔE) of 3 or more are used as the covering material, and the covering material thereof. Is characterized in that the heating residue is 25% by weight or more. The step includes a step of sequentially applying each of the above two types of covering materials to the surface to be coated, and after the previously applied covering material is in a non-fluid state in the previous step, the next step is performed. It is characterized in that the covering material is applied discontinuously (partially) using a spongy material. The decorative coating surface formed by the present invention is a mixture of at least two or more colored regions (for example, colored regions A, colored regions B, etc.) when viewed from the front. Further, a coating film applied discontinuously is formed on the surface side of the decorative coating film surface.

FIG. 1 shows an example (front view) of the decorative coating surface formed by the present invention. According to the method for forming the decorative coating surface of the present invention, when visually recognized from the front as shown in FIG. 1, the colored region A (FIG. 1: 1a) and the colored region B (FIG. 1: 1b) are mixed to provide contrast. It is possible to form a decorative coating surface having a high aesthetic appearance.

Hereinafter, the method of forming the decorative coating surface of FIG. 1 will be described as an example.

FIG. 1 shows a decorative coating surface formed by sequentially applying two types of coating materials, a first coating material and a second coating material, as a coating material. As the first covering material and the second covering material, those having a color difference (ΔE) of 3 or more (preferably 5 or more) are used. When the color difference (ΔE) is a specific value in this way, it is possible to form a highly aesthetically pleasing film having contrast between the colored regions. The upper limit of the color difference (ΔE) is not particularly limited, but is preferably 90 or less, and can be set according to a desired design. For example, in the case of forming a unified and calm design while imparting contrast, the upper limit of the color difference (ΔE) is preferably 20 or less. On the other hand, when forming an accent design in which the contrast between the colored regions is clear, it is preferable that the color difference (ΔE) is more than 20 and 90 or less.

The color difference (ΔE) in the present invention is a value measured using a color difference meter. Specifically, each coating material is applied to standard blank paper using a film applicator with a clearance of 250 μm, and the coated surface is placed horizontally in a standard state (temperature 23 ° C., relative humidity 50%; the same applies hereinafter) 48. It can be calculated by the following formula from the L ^* value, a ^* value, and b ^* value (average value of three or more measurement points) of the film when it is dried for a long time.
<Equation> ΔE = {(L ^{* 1} -L ^{* 2} ) ² + (a ^{* 1} -a ^{* 2} ) ² + (b ^{* 1} -b ^{* 2} ) ² } ^0.5
(In the formula, L ^{* 1} , a ^{* 1} , b ^{* 1} are the L ^* , a ^* , b ^* .L ^{* 2} , a ^{* 2} , and b ^{* 2} of the first covering material, respectively. ^* , A ^* , b ^* )

Further, the two types of covering materials, the first covering material and the second covering material, form various designs (patterns) by combining arbitrary color tones so as to satisfy the above range of the color difference (ΔE). Can be done. In the present invention, it is particularly preferable that the color of the second coating material is darker than that of the first coating material. By discontinuously applying a dark-colored dressing as the second dressing, the boundaries between the colored regions can be easily visually recognized, and a highly aesthetically pleasing decorative surface can be stably formed. The term "dark" as used herein means that the brightness L ^* (CIE L ^* , a ^* , b ^* color space) is lower than that of the first coating material.

As a method for forming the decorative coating surface shown in FIG. 1, for example,
The surface to be coated includes a first step of applying the first covering material and a second step of applying the second covering material.
(I) A method in which the first coating material is applied to the entire surface of the surface to be coated, and after the first coating material is in a non-fluid state, the second coating material is applied discontinuously.
(II) A method in which the first coating material is applied discontinuously to the surface to be coated, and after the first coating material is in a non-fluid state, the second coating material is applied discontinuously.
And so on.

In the above (I), the coating amount of the first coating material may be appropriately set in consideration of the type / state of the surface to be coated, the finish, etc., but is preferably 30 to 500 g / m ² , more preferably 80. It is ~ 400 g / m ² , more preferably 90 ~ 300 g / m ² . When the amount of the first coating material applied satisfies the above range, a continuous film covering the entire surface to be coated is likely to be formed. The amount of the second coating material applied may be appropriately set according to the desired finish (pattern, etc.), but it is preferable that the amount of the second coating material applied is smaller than that of the first coating material. It is preferably 100 g / m ² or less, more preferably 5 to 90 g / m ² , and even more preferably 10 to 80 g / m ² . When the amount of the second coating material applied satisfies the above range, a discontinuous film is likely to be formed, and a decorative film surface in which different colored regions are mixed can be stably formed. In the present invention, "a to b" are synonymous with "a or more and b or less".

In the above (II), the amount of the first coating material and the second coating material applied is preferably at least one, preferably 100 g / m ² or less (more preferably 5 to 90 g / m ² , still more preferably 10 to 80 g). / M ² ) may be used. The other type of covering material may be appropriately set in consideration of the type, condition, finish, etc. of the surface to be coated, but is preferably 500 g / m ² or less (more preferably 100 g / m ² or less, still more preferably 5). It is ~ 90 g / m ² , particularly preferably 10-80 g / m ² ). In the above (II), it is preferable that the coating amounts of the first coating material and the second coating material are each within the range of 100 g / m ² or less.

Further, in the above (I), the amount of the coating material applied to the entire surface of the surface to be coated is preferably 10 to 500 g / m ² , more preferably 20 to 400 g / m in terms of solid content. It is ² . Further, in the above (I) and (II), the amount of the coating material applied discontinuously to the surface to be coated is preferably 100 g / m ² or less, more preferably 1 to 1 in terms of solid content. It is 80 g / m ² , more preferably 5 to 40 g / m ² . In the above (I), it is preferable that the coating amount of the second coating material is smaller than the coating amount of the first coating material.

The coating material in the present invention can be diluted with various solvents at the time of application. The dilution ratio of the covering material can be appropriately set as long as it satisfies the range of the heating residue of the covering material of the present invention, but is preferably 0 to 50% by weight (more preferably 0) with respect to the covering material. ~ 30% by weight). In the present invention, it is preferable that the dilution ratio of the coating material in the second step (next step) is smaller than the dilution ratio of the covering material (coating material applied first) in the first step. In particular, in the above (I), as the first coating material, a coating material having a large dilution ratio (preferably 1 to 50% by weight, more preferably 2 to 40% by weight) is applied to the entire surface to be coated, and the second coating is applied. As a material, it is preferable to apply a coating material having a small dilution ratio (preferably 0 to 20% by weight, more preferably 0 to 10% by weight) discontinuously. In this case, different colored regions are mixed, and a highly aesthetic decorative coating surface having contrast can be formed more efficiently.

The viscosity of the coating material at the time of application is preferably 0.1 to 10 Pa · s, more preferably 0.5 to 9.5 Pa · s. In particular, in the above (I), the viscosity of the coating material (coating material previously applied) in the first step at the time of application is preferably 0.1 to 8 Pa · s (more preferably 0.5 to 6 Pa · s). s). In such a case, a continuous film covering the entire surface to be coated is likely to be formed, and excellent finish can be ensured. On the other hand, the viscosity of the coating material in the second step (next step) at the time of application is preferably 2 to 10 Pa · s (more preferably 2.5 to 9.5 Pa · s). In such a case, the spongy material contains an appropriate amount of the covering material, a discontinuous film is likely to be formed, the boundary between the colored regions becomes clear, and the design can be enhanced. In particular, in the above (I), it is preferable that the viscosity of the coating material in the second step (next step) is higher than the viscosity of the covering material (coating material applied first) in the first step, and the difference in viscosity is high. Is preferably 1 to 8 Pa · s (more preferably 1.5 to 6 Pa · s). In this case, different colored regions are mixed, and a highly aesthetic decorative coating surface having contrast can be formed more efficiently.

Further, in (II) above, the viscosity of the first coating material and the second coating material at the time of application is preferably 2 to 10 Pa · s (more preferably 2.5 to 9.5 Pa · s). In such a case, the spongy material contains an appropriate amount of the covering material, a discontinuous film is likely to be formed, the boundary between the colored regions becomes clear, and the design can be enhanced. The viscosity is a value (guideline value at the fourth rotation) measured using a BH type viscometer (rotation speed 20 rpm) in a standard state (temperature 23 ° C., relative humidity 50%).

In the above (I) and (II), the timing of applying the second coating material is not particularly limited as long as the first coating material (the previously applied coating material) is in a non-fluid state. In the present invention, the "non-fluid state" means a state in which the fluidity of the coating film is lost after the first coating material is applied, and specifically, the second coating material is applied. It refers to a state in which the coating materials are dried and hardened to the extent that they do not bleed or the coating materials do not mix with each other. This "non-fluid state" also includes states such as touch drying, semi-curing drying, and curing drying defined in JIS K5400. In the present invention, it is preferable to apply the second coating material after the first coating material is touch-dried (more preferably after semi-curing drying, further preferably after curing and drying). In the present invention, drying and curing may be preferably carried out at room temperature (5 to 40 ° C.).

Unlike the present invention, if the second coating material is applied while the first coating material is in a fluid state, the first coating material and the second coating material are gradually mixed in the coating tool during the coating process, and the first coating material is formed. There is a risk that the finish of the film will be unstable. Further, the coating materials are mixed on the surface to be coated, and the contrast is easily reduced. On the other hand, in the present invention, after the first coating material is in a non-fluid state, by applying the second coating material discontinuously, it is possible to prevent the coating materials from mixing with each other and to provide a stable finish. It is possible to obtain a highly aesthetically pleasing decorative film having contrast. In particular, a remarkable effect can be obtained when the surface to be coated has a large area.

Examples of the coating instrument for applying the covering material include a spray, a roller, a brush (including a brush and the like), a pressing tool (including a tapping tool and the like), and the like. Among these, examples of the roller include a fibrous roller, a porous (sponge) roller, and the like, and as the pressing tool, for example, a roller having a sponge, felt, woven fabric, non-woven fabric, or the like can be used.

In the above (I), when the coating material is applied to the entire surface to be coated, it is desirable to use, for example, a spray, a roller, a brush or the like. As the roller, a fibrous roller is particularly suitable.

In the present invention, when the coating material is applied discontinuously as in the above (I) and (II), a spongy material is used. In the present invention, when the covering material is applied discontinuously, by using such a spongy material, it is possible to make the boundary between the colored regions in a non-linear state (intricate state) while imparting contrast. It can be done and the aesthetics can be further enhanced.

In the step of applying the covering material discontinuously, a spongy material may be used and applied so that the covering material is partially applied to the surface to be coated. In order to apply the dressing discontinuously, the spongy material may be intermittently (partially) contacted with the surface to be coated, for example, a method of applying by pushing or a method of applying by tapping. , A method of applying while rubbing can be adopted. In this step, a coating instrument having a spongy material can be used, and a roller or a pressing tool having a spongy material is suitable. When a roller having a spongy material is used, it is preferable that the roller is continuously rolled and applied, that is, the surface to be coated is intermittently (partially) contacted and rolled. At this time, it is preferable that the rollers are in contact with each other and rolled in a random direction.

As the sponge material, for example, a sponge-like porous resin such as an acrylic resin, a urethane resin, an ester resin, or an ethylene resin can be used. The hardness of the spongy material is preferably 10 to 3000 N, more preferably 20 to 2000 N, and even more preferably 30 to 1500 N. The density of the spongy material is preferably 1 to 300 kg / m ³ , more preferably 3 to 200 kg / m ³ , and more preferably 5 to 150 kg / m ³ . The "hardness" referred to here is a value of hardness (method C) measured from the force when the test piece is compressed to a thickness of 40% according to JIS K6400-2. The "density" is a value of apparent density calculated from the weight and dimensions of the test piece according to JIS K7222.

The shape of the spongy material is, for example, a shape having a polygonal shape such as a triangle, a quadrangle, a diamond shape, a pentagonal shape, a hexagonal shape, a circular shape, an elliptical shape, a curved surface such as a drop (water drop) shape, or an irregular shape. Further, a shape that combines these can be used. The size may be appropriately set according to a desired pattern.

As the sponge material, one type of sponge material satisfying the above conditions can be used. For example, at least two types of sponge material having different hardness and / or density as shown in FIG. 2 (FIG. 2: 2: Pressing tools in which 2a to 2e) are randomly mixed, and at least two or more kinds of spongy materials (FIGS. 3: 3a to 3e) having different hardness and / or densities as shown in FIG. 3 are formed on the outer peripheral surface of the cylinder (FIG. 3: 3 :). It is preferable to apply with a roller mixed in 3f). In such a coating device, at least one kind (preferably two or more kinds) of spongy material may satisfy the above conditions. By using such a specific coating tool, the finish and aesthetics can be further improved.

In FIGS. 2 and 3, the spongy material is more preferably fixed so as to be stacked. Further, it is more preferable that the spongy material is compression-molded so as to be randomly mixed.

The spongy material of FIGS. 2 and 3 has a three-dimensional shape having an irregular outer shape, and the individual size thereof is preferably 1 to 30 mm (more preferably 2 to 20 mm). In the present invention, it is preferable that a large number of spongy materials having different sizes are mixed. In such a case, an irregular irregular shape is likely to be formed between the spongy materials, so that the effect of the present invention can be further enhanced. The "size" referred to here is the longest axis of the outer shape, and is measured by being sieved by a sieve having squares having a predetermined dimension on one side, for example. The thickness of the spongy material (FIG. 2: thickness in the 2f direction, FIG. 3: thickness in the 3g direction) is preferably 2 to 50 mm (more preferably 3 to 3 to 3), although it depends on the size of each sponge material. 30 mm).

FIG. 4 shows another example (front view) of the decorative coating surface formed by the method for forming the decorative coating surface of the present invention. In FIG. 4, three types of dressing, a first dressing, a second dressing, and a third dressing, are applied in order as a dressing, and the colored region A by the first dressing and the second dressing are used. A decorative coating surface having a colored region B and a colored region C (FIGS. 4: 1a to 1c) made of a third covering material is formed. As the method for forming the decorative coating surface shown in FIG. 4, the same method as in the case of FIG. 1 may be used, for example.
The first coating material is applied to the surface to be coated on the entire surface or discontinuously (first step).
After the first coating material is in a non-fluid state, the second coating material is applied discontinuously (second step).
A method of discontinuously applying the third coating material after the second coating material is in a non-fluid state (third step).
It can be formed by such as.

When there are three types of covering materials, the color difference (ΔE) of at least two types of covering materials adjacent to each other on the decorative coating surface to be formed may satisfy the above conditions. As such an embodiment, for example,
(X) First coating material and second coating material,
(Y) First coating material and third coating material,
(Z) Second coating material and third coating material,
In the combination of, at least one combination satisfies the above conditions, two combinations satisfy the above conditions, and three combinations satisfy the above conditions. In the present invention, it is preferable that two or three combinations of (X), (Y), and (Z) satisfy the above conditions. Also, when four or more different types of covering materials are used, the covering materials (first covering material, second covering material, third covering material, fourth covering material, ..., etc.) are similarly applied (such as). 1st step, 2nd step, 3rd step, 4th step, ...), Colored area A, colored area B, colored area C, colored area D, ... Just do it.

In the method for forming a decorative coating surface of the present invention, a clear coating material is applied to the outermost surface for the purpose of surface protection, weather resistance improvement, stain resistance, etc., as long as the effect of the present invention is not impaired, to form a clear layer. It can also be provided. Such a clear layer may be colorless and transparent, or may be colored and transparent, and may be glossy or matte (including 7-minute gloss, 5-minute gloss, 3-minute gloss, and the like).

<Applied surface>
The surface to be coated in the present invention is preferably a base material constituting the surface of a base material such as a building or a civil engineering structure, particularly the surface of an inner / outer wall, a ceiling, a fitting or the like. Examples of such a base material include gypsum board, concrete, mortar, porcelain tile, brick, cement board, fiber-mixed cement board, cement calcium silicate board, pearlite board, ALC board, siding board, extruded board, plywood, and the like. Examples include wood plates, steel plates, plastic plates, glass plates, and the like. The surface of these base materials may be one that has been subjected to some kind of surface treatment (for example, a sealer, a surfacer, a filler, etc.), one that has already been coated with a coating film, or one to which a wallpaper is attached. ..

<Dressing material>
As the coating material in the present invention, a material containing a resin and a pigment can be used. In the present invention, the color, gloss and the like can be set by adjusting the type of pigment, the mixing ratio and the like. The mixing ratio of the resin and the pigment is preferably 5 to 500 parts by weight (more preferably 20 to 400 parts by weight, still more preferably 30 to 300 parts by weight) with respect to 100 parts by weight of the resin solid content.

Examples of the resin include a water-soluble resin, a water-dispersible resin, a solvent-soluble resin, a solvent-free resin, a non-water-dispersed resin, and the like, or a composite thereof. These may have a cross-linking reactivity, and the form thereof is not particularly limited, and may be either a one-component type or a two-component type. In particular, a water-dispersible resin and / or a water-soluble resin is preferably used in the present invention. Examples of the types of resins that can be used include cellulose, polyvinyl alcohol, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, silicone resin, acrylic resin, urethane resin, acrylic silicon resin, and fluorine. Examples thereof include resins and the like, or composite systems thereof and the like. In the present invention, it is desirable not to use a hydraulic binder such as cement because it may limit the color of the coating film.

As the pigment, known coloring pigments, extender pigments and the like can be used. Among these, the coloring pigments include, for example, titanium oxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chrome black, cobalt black, copper manganese iron black, red iron oxide, molybdate orange, and permanent. Red, Permanent Carmine, Anthracinone Red, Perylene Red, Kinacridon Red, Yellow Iron Oxide, Titanium Yellow, First Yellow, Benz Imidazolone Yellow, Chrome Green, Cobalt Green, Phtalocyanin Green, Ultramarine, Navy Blue, Cobalt Blue, Phtalussinin Blue, Kinacridon Violet , Dioxazine violet, aluminum pigments, pearl pigments, brilliant pigments and the like. Any hue can be obtained by using one or more of these coloring pigments.

Examples of the extender pigment include heavy calcium carbonate, cold water stone, light calcium carbonate, white carbon, talc, kaolin, clay, porcelain clay, China clay, diatomaceous earth, barite powder, barium sulfate, sedimentation barium sulfate, silica sand, and silica stone. Examples thereof include powder, quartz powder, resin beads, glass beads, hollow balloons and the like, and one or more of these can be used. The coating material can be adjusted to a desired glossiness by appropriately setting the type of the extender pigment, the mixing ratio, and the like.

In addition to the above components, the coating material of the present invention includes known additives such as aggregates, dyes, thickeners, wetting agents, antifreeze agents, and film-forming aids, as long as the effects of the present invention are not significantly impaired. It may contain an agent, an antiseptic, an antifungal agent, an antibacterial agent, an antibacterial agent, a dispersant, an antifoaming agent, an ultraviolet absorber, a light stabilizer, an antioxidant, a catalyst, a diluting solvent and the like. The covering material can be produced by uniformly mixing each of the above-mentioned components by a conventional method.

The heating residue of the covering material is 25% by weight or more, preferably 30 to 80% by weight. In the present invention, the heating residue of the coating material is within such a range, which is suitable in terms of imparting contrast and the like, and further, the time required for drying and curing can be shortened, and non-fluidization can be performed at an early stage. You can get the state. When the heating residue of the dressing is less than the above value, the contrast tends to be unclear, and it takes time to obtain a non-fluid state. The heating residue is a value measured by the method of JIS K5601-1-2, the heating temperature is 105 ° C., and the heating time is 60 minutes.

Further, in the present invention, the heating residue of the first coating material, the second coating material, etc. may satisfy the above range, but it is preferable to set the heating residue of the second coating material higher than that of the first coating material. .. Thereby, the effect of the present invention can be enhanced. The heating residue can be set by the dilution ratio of the coating material. For example, the coating material having a large dilution ratio may be used as the first coating material, and the coating material having a small dilution ratio may be used as the second coating material. .. The difference between the heating residue of the first coating material and the second coating material is preferably 1 to 30% by weight, more preferably 2 to 25% by weight, and more preferably 3 to 20% by weight.

The hiding rate of the covering material is preferably 70% or more, more preferably 80% or more, still more preferably 90% or more. When the hiding rate of the covering material is within such a range, the forming film of the covering material can be made opaque, which is suitable in terms of imparting contrast and the like. The concealment rate is as follows after measuring the visual reflectance of the test piece obtained by applying the covering material to the concealment rate test paper with a film applicator (gap 150 μm) and drying it in a standard state for 24 hours. It is a value calculated by the formula.
<Formula>
Concealment rate (%) = (visual reflectance of the coating film on the black ground) / (visual reflectance of the coating film on the white ground) × 100

Examples are shown below to clarify the features of the present invention.

The following materials were prepared as covering materials.

・ Dressing 1-1
Light gray coating material (L ^* value: 89.1, a ^* value: -0.3, b ^* value) containing acrylic resin emulsion and pigments (titanium oxide, carbon black, yellow iron oxide, extender pigment) as the main components. : 4.1, glossiness: 11, heating residue: 54% by weight, viscosity: 3.5Pa · s, concealment rate: 97%, pigment ratio: 130 parts by weight with respect to 100 parts by weight of resin solid content)

・ Dressing 1-2
Acrylic resin emulsion, white coating material mainly composed of pigments (titanium oxide, extender pigment) (L ^* value: 97.4, a ^* value: -0.4, b ^* value: 1.6, glossiness: 11. Heating residue: 57% by weight, viscosity: 5Pa · s, hiding rate: 97%, pigment ratio: 134 parts by weight with respect to 100 parts by weight of resin solid content, color difference from covering material 1-1 ΔE: 8. 7)

・ Dressing 2-1
A dark gray coating material (L ^* value: 36.5, a ^* value: -0.2, b ^* value: -1. 8, glossiness: 10, heating residue: 40% by weight, viscosity: 2.1Pa · s, concealment rate: 98%, pigment ratio: 140 parts by weight with respect to 100 parts by weight of resin solid content)

・ Dressing 2-2
Black coating material (L ^* value: 26.4, a ^* value: 0.1, b ^* value: -0.3) containing acrylic resin emulsion and pigments (carbon black, yellow iron oxide, extender pigment) as the main components. , Luster: 10, Heating residue: 56% by weight, Viscosity: 4.8Pa · s, Concealment rate: 98%, Pigment ratio: 138 parts by weight with respect to 100 parts by weight of resin solid content, Covering material 2-1 Color difference ΔE: 10.2)

・ Dressing 3-1
A white coating material (L ^* value: 97.0, a ^* value: -0.7, b ^* value: 2.1) containing acrylic resin emulsion and pigments (titanium oxide, yellow iron oxide, extender pigment) as the main components. , Glossy: 10, Heating residue: 70% by weight, Viscosity: 7Pa · s, Concealment rate: 98%, Pigment ratio: 180 parts by weight with respect to 100 parts by weight of resin solid content)

・ Dressing 3-2
Acrylic resin emulsion, beige coating material (L ^* value: 88.7, a ^* value: -0.1, mainly composed of pigments (carbon black, yellow iron oxide, red iron oxide, titanium oxide, extender pigment) b ^* Value: 3.9, glossiness: 10, heating residue: 70% by weight, viscosity: 7Pa · s, hiding ratio: 98%, pigment ratio: 185 parts by weight with respect to 100 parts by weight of resin solid content, coating material Color difference from 3-1 ΔE: 8.5)

(Example 1)
As the first step, the coating material 1-1 is coated on the base material (slate plate) with a coating amount of 120 g / m ² (coating amount of 64.8 g / m ² ) on the entire surface (using a fibrous roller). , It was dried for 2 hours so as to be in a state of touch drying or higher. Next, as a second step, the coating material 1-2 is continuously tapped with a coating amount of 40 g / m ² (coating amount of 22.8 g / m ² ) [sponge material (hardness 110 to 140 N, density 15 to 2)]. Using a pressing tool consisting of 50 kg / m ³ )], dried for 24 hours. All painting and drying were performed under standard conditions. From the above method, a light gray region and a white region coexist, and a highly aesthetically pleasing decorative coating surface having contrast was obtained. The amount of coating is a value in terms of solid content (same below).

(Example 2)
As the first step, the coating material 2-1 is coated on the base material (slate plate) with a coating amount of 120 g / m ² (coating amount of 48 g / m ² ) on the entire surface with a roller (using a fibrous roller). It was dried for 2 hours so as to be in a state of tactile drying or higher. Next, as a second step, the coating material 2-2 is continuously tapped with a coating amount of 50 g / m ² (coating amount of 28 g / m ² ) [sponge material (hardness 75 to 110 N, density 15 to 30 kg /). Using a pressing tool consisting of m ³ )], it was dried for 24 hours. All painting and drying were performed under standard conditions. From the above method, a dark gray region and a black region coexist, and a highly aesthetically pleasing decorative coating surface having contrast was obtained.

(Example 3)
As the first step, the coating material 2-1 is coated on the base material (slate plate) with a coating amount of 120 g / m ² (coating amount of 48 g / m ² ) on the entire surface with a roller (using a fibrous roller). It was dried for 2 hours so as to be in a state of tactile drying or higher. Next, as a second step, the coating material 2-2 is discontinuously roller-coated with a coating amount of 50 g / m ² (coating amount of 28 g / m ² ) (having five types of spongy materials as shown in FIG. 3). Roller is used. Sponge material 3a: hardness 45-60N, density 50-100kg / m ³ , sponge material 3b: hardness 75-110N, density 15-30kg / m ³ , sponge material 3c: hardness 110-140N, Density 15-50 kg / m ³ , Sponge material 3d: Hardness 110-300 N, Density 30-85 kg / m ³ , Sponge material 3e: Hardness 1000-1500 N, Density 10-20 kg / m ³ ), dried for 24 hours .. All painting and drying were performed under standard conditions. From the above method, a dark gray region and a black region coexist, and a highly aesthetically pleasing decorative coating surface having contrast was obtained.

(Example 4)
As the first step, the coating material 3-1 is diluted with water at a dilution ratio of 15% (viscosity after dilution: 3 Pa · s, heating residue after dilution: 61% by weight) and coated on the base material (slate plate). The entire surface was coated with a roller (using a fibrous roller) with an application amount of 120 g / m ² (application amount 73.2 g / m ² ), and dried for 2 hours so as to be in a state of touch drying or higher. Next, as a second step, the coating material 3-2 is diluted with water at a dilution ratio of 5% (viscosity after dilution: 5 Pa · s, residual heating residue after dilution: 67% by weight), and a coating amount of 50 g / m ² ( Discontinuously tapping with a coating amount of 33.5 g / m ² ) (using a pressing tool having five types of spongy materials as shown in FIG. 2. Sponge material 2a: hardness 45-60N, density 50- 100 kg / m ³ , sponge material 2b: hardness 75 to 110 N, density 15 to 30 kg / m ³ , sponge material 2c: hardness 110 to 140 N, density 15 to 50 kg / m ³ , sponge material 2d: hardness 110 to 300 N , Density 30-85 kg / m ³ , Sponge material 2e: Hardness 1000-1500 N, Density 10-20 kg / m ³ ), dried for 24 hours. All painting and drying were performed under standard conditions. From the above method, a white region and a beige region are mixed, and a highly aesthetically pleasing decorative coating surface having contrast is obtained.

In each of Examples 1 to 4, two types of colored regions, a coating film formed in the first step and a coating film formed discontinuously in the second step, are mixed, and a highly aesthetic decorative coating surface having contrast is obtained. was gotten. In particular, in Examples 3 and 4, the boundary between the colored regions can be made into a more complicated non-linear shape (intricate pattern), and a decorative coating surface having higher finish and aesthetics can be obtained.

Claims (3)

A method for forming a decorative coating surface in which at least two or more colored regions are mixed.
Using at least two kinds of dressings having a color difference (ΔE) of 3 or more,
All of the above-mentioned covering materials have a heating residue of 25% by weight or more.
On the surface to be coated,
Including the first step of applying the first covering material and the second step of applying the second covering material.
The heating residue of the second coating material is higher than that of the first coating material, and the difference is 1 to 30% by weight.
A method for forming a decorative coating surface, which comprises applying the second coating material discontinuously using a spongy material after the first coating material is in a non-fluid state. The method for forming a decorative coating surface according to claim 1, wherein the first coating material is applied to the entire surface. The method for forming a decorative coating surface according to claim 1, wherein the first coating material is applied discontinuously to the surface to be coated using a spongy material.

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