JP4895494B2 - Pattern surface formation method - Google Patents

Description

  The present invention relates to a method for forming a pattern surface in a building or a civil engineering structure.

  Conventionally, a paint called a flat paint is generally used for coating a surface of a building or a civil engineering structure, but the color obtained by the flat paint is usually a single color. On the other hand, various coating methods have been proposed in which a plurality of colors appear on the surface.

For example, in Japanese Patent Laid-Open No. 55-79080 (Patent Document 1), a colored translucent high-viscosity coating material is applied to a surface to be coated having an uneven three-dimensional pattern, and the applied coating material is not cured. A method for forming a multicolored paint surface is described by removing the high-viscosity coating material on the top surface of the convex portion using a coating material removal tool such as a trowel and curing the remaining high-viscosity coating material. ing.
In Japanese Patent Publication No. 1-30991 (Patent Document 2), a coating colored on the surface of the coating layer A having a large number of projections and depressions on the surface is colored in a color different from that of the coating layer A. A method is described in which after coating with the coating layer B, a part of the coating layer B is removed by brushing or the like to expose the convex portions of the coating layer A.
JP-A-57-78977 (Patent Document 3) applies a coating material mainly composed of an aggregate having a color different from that of the ground surface and a resin emulsion over the entire ground surface. A two-color finished coated surface forming method is described in which the ink is caused by a patterning roller and then dried.

  However, in the above-described methods of Patent Documents 1 and 2, it is necessary to sequentially laminate two or more kinds of coating materials, and the coating material that has already been applied must be removed. It is also difficult to shorten. Further, in the method of Patent Document 3, unevenness is generated in the upper coating material layer, and in order to form a two-color pattern so that the color of the underlying surface can be visually recognized in the concave portion, a smooth coating film can be formed. Can not.

  On the other hand, in Japanese Patent Publication No. 7-47879 (Patent Document 4), a plurality of kinds of mixed materials prepared by mixing colored aggregates in a synthetic resin are prepared, and these are simultaneously supplied from separate spray ports of a multi-head spray gun. It describes a method of applying in an unmixed multicolored state by spraying. According to this method, it is possible to obtain a multicolored pattern by one coating.

  However, since the method of Patent Document 4 is based on spray painting, there is a limit in terms of preventing scattering of the coating material, and it is actually the case that the curing before coating is troublesome. Moreover, the method of patent document 4 aims at obtaining the external appearance similar to natural stones, such as granite and marble, and obtains other external appearance patterns, such as a streaky pattern, in the formed coating film. I can't.

JP 55-79080 A Japanese Patent Publication No. 1-30991 JP-A-57-78977 Japanese Patent Publication No. 7-47879

  The present invention has been made in view of the above-described problems, and an object thereof is to obtain a pattern surface in which a plurality of hues are mixed by a simple method.

  As a result of intensive studies to achieve the above object, the present inventor has applied a water-based coating material obtained by mixing specific color particles to a substrate, and a coating method in which the coated surface is finished with a trowel. As a result, the present invention has been completed.

That is, the present invention has the following characteristics.
1. With respect to an aqueous coating material containing a binder, an aggregate, and an aqueous medium, a color particle having a hue different from that of the aqueous coating material and having softness to water is maintained while maintaining the state of the color particle. were mixed so as to uniformly dispersed in, denoted by coating the aqueous coating material to a substrate obtained by mixing, it dragged while collapse color particle squeezes the coated surface with iron, the streak-like pattern A method for forming a pattern surface, wherein the pattern surface is finished so as to be formed smoothly .

According to the present invention, a pattern surface in which a plurality of hues are mixed can be formed by a single coating. And in this invention, a smooth coating-film surface can be obtained.
The present invention is particularly suitable as a method for expressing a streak pattern.

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

  The present invention is a method suitable for surface makeup in buildings, civil engineering structures, and the like. The base material to be painted is not particularly limited as long as it can be used in the field of construction and civil engineering. Specifically, concrete, mortar, porcelain tile, fiber mixed cement board, cement calcium silicate board, slag cement pearlite board, asbestos cement board, ALC board, siding board, extrusion molding board, steel sheet, gypsum board, plywood, plastic A board etc. are mentioned. Such a substrate may have an old paint film, wallpaper, or the like. Further, the surface of the base material can be treated in advance with a surfacer, filler, putty, sealer or the like.

In the present invention, first, an aqueous coating material containing a binder, an aggregate, and an aqueous medium is prepared as a material to be used for coating.
Among these, as the binder, various binders such as a water-soluble resin and a water-dispersible resin, or a binder obtained by combining these can be used. These may have crosslinking reactivity. Further, the form of the binder is not particularly limited, and may be either one-component type or two-component type. Usable types of resin include, for example, 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, fluorine Examples thereof include resins and the like, and composites thereof. The glass transition temperature of the binder can be appropriately set, and is usually about −50 to 50 ° C.

  As the aggregate, at least one selected from natural aggregates such as natural stones and natural stone pulverized products, and artificial aggregates such as colored aggregates can be suitably used. Specifically, for example, marble, granite, serpentine, granite, fluorite, cryolite, feldspar, limestone, quartzite, quartz sand, crushed stone, mica, siliceous shale, and pulverized products thereof, ceramic pulverized products, ceramic pulverized products Products, glass pulverized products, glass beads, resin pulverized products, resin beads, rubber particles, metal particles and the like, and pulverized products such as shells, shellfish, wood, charcoal, activated carbon and the like can also be used. These can also be used with a colored coating. The particle size of these aggregates is usually about 0.05 to 5 mm. The mixing ratio of the aggregate is usually about 50 to 2000 parts by weight (preferably 100 to 1000 parts by weight) with respect to 100 parts by weight of the solid content of the binder. In the present invention, various colors can be expressed by appropriately combining colored materials as such aggregates.

  The aqueous medium in the aqueous coating material contains water as a main component, and may contain an organic solvent or the like as necessary. The ratio of water in the aqueous medium is usually 70% by weight or more. As the organic solvent in the aqueous medium, an organic solvent exhibiting solubility in water can be used, and examples thereof include alcohols, glycols, glycol ethers and the like. The medium in the binder is also included in the aqueous medium. The weight ratio of the aqueous medium in the aqueous coating material is usually 100 to 1500 parts by weight, preferably 120 to 1000 parts by weight with respect to 100 parts by weight of the solid content of the binder.

  The aqueous coating material in the present invention can be mixed with a pigment as necessary. Examples of the pigment include coloring pigments and extender pigments that can be used in ordinary coating materials. Among these, the coloring pigments include, for example, titanium oxide, zinc oxide, carbon black, black iron oxide, bengara, molybdate orange, permanent carmine, perylene red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, and benzimidazo. Long yellow, cobalt green, phthalocyanine green, ultramarine blue, bitumen, phthalocyanine blue, quinacridone violet, dioxazine violet, aluminum pigment, pearl pigment and the like can be used. When an aggregate having a low color developability is used as the aggregate, various colors can be imparted by these colored pigments.

  Examples of extender pigments include heavy calcium carbonate, light calcium carbonate, kaolin, clay, porcelain clay, china clay, calcined clay, diatomaceous earth, hydrous finely divided silicic acid, talc, barite powder, barium sulfate, precipitated barium sulfate, barium carbonate, Examples thereof include magnesium carbonate, silica powder, and aluminum hydroxide. The particle size of the extender pigment is usually less than 50 μm (preferably 0.5 μm or more and less than 50 μm).

  The aqueous coating material in the present invention can be produced by uniformly mixing the above components by a conventional method. However, components other than the above components, such as fibers, film-forming aids, plasticizers, preservatives, and antifungal agents. An agent, an antibacterial agent, an antifoaming agent, a dispersing agent, a thickening agent, a leveling agent, a wetting agent, a pH adjusting agent, an ultraviolet absorber, an antioxidant, a catalyst, a crosslinking agent, and the like can be appropriately mixed.

  In the present invention, color particles having a hue different from that of the aqueous coating material and having a softening property against water are mixed with the above aqueous coating material. In the present invention, by using such color grains, a pattern surface in which a plurality of hues are mixed can be formed by a single coating.

  The hue of the color particles is not particularly limited as long as it is different from that of the aqueous coating material, and can be appropriately set according to a desired finished appearance. For example, when the color difference ΔE between the dry coating film of the water-based coating material and the color particles is 3 or more, it is possible to form a pattern surface having a sharp color. If the color difference ΔE is less than 3, it is possible to form an elegant and calm pattern surface that is combined with an exquisite balance. The lower limit of the color difference ΔE may be about 0.3 or more (further 0.5 or more).

The color difference ΔE referred to here is a value (the following formula) measured using a color difference meter.
_{^{<Expression> 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 , and b ^* ₁ are L ^* , a ^* , and b ^* , respectively, of the dry coating film of the water-based coating material ^. L ^* ₂ , a ^* ₂ , and b ^* ₂ are the color grains, respectively. L ^* , a ^* , b ^* )

  As the color particles in the present invention, those having softening properties against water are used. In addition, the “softening property with respect to water” referred to in the present invention means a property that the hardness is reduced by water immersion. Specifically, when the hardness before and after immersion when the color particles are immersed in water for 10 minutes is measured by a spring type hardness tester (A type), the value after immersion is the value before immersion. The property is 30% or less (preferably 20% or less, more preferably 10% or less, and further preferably 5% or less). In particular, as the color particles in the present invention, the hardness before water immersion by the hardness tester is 50 degrees or more (preferably 60 degrees or more, more preferably 70 degrees or more), and the hardness after water immersion is 15 degrees. What is below (preferably 10 degrees or less, more preferably 5 degrees or less) is suitable.

  The composition of the color particle in the present invention is not particularly limited as long as it has the above properties, but specifically, a coating material containing a binder, an extender pigment, and an aggregate (hereinafter referred to as “color particle coating material”). Is preferably solidified in a granular form. Here, the ratio of each component is 10 to 1000 parts by weight (preferably 30 to 800 parts by weight, more preferably 50 to 500 parts by weight) of the extender pigment, and 500 to 500 parts of the aggregate with respect to 100 parts by weight of the solid content of the binder. The amount is preferably 4000 parts by weight (preferably 1000 to 3500 parts by weight, more preferably 1200 to 3000 parts by weight).

  As the binder, extender pigment, and aggregate in the color particle coating material, those similar to those exemplified in the description of the aqueous coating material can be used. However, it is desirable that the extender pigment is used so that the oil absorption amount is 20 ml / 100 g or more (preferably 50 ml / 100 g, more preferably 100 ml / 100 g or more) in the above ratio. Use of such extender pigments can impart appropriate softening properties to the color particles. The upper limit of the oil absorption is usually 250 ml / 100 g or less. In addition, the oil absorption amount mentioned here is a value measured by the method of JIS K5101. As such extender pigments, calcined clay, diatomaceous earth, silica powder and the like are particularly suitable.

  The hue of the color grains can be adjusted by using a suitable combination of colored aggregates in the color grain coating material. Further, when the aggregate has a low color developability, it can be colored by separately mixing a color pigment. As for the color pigment, the same pigment as the water-based coating material can be used.

As a method for producing the color particles, a method of forming and solidifying the color particle coating material into a granular shape, a method of solidifying the color particle coating material and then pulverizing it into a granular shape, or the like can be employed. When the color grain coating material is solidified, the color grain coating material may be dried at room temperature. At this time, heating may be performed as necessary.
The shape of the color grain is not particularly limited, and examples thereof include a spherical shape, a flat shape, a plate shape, a square shape, a rod shape, a cylindrical shape, and an indefinite shape.
The particle diameter of the color grains is usually about 1 to 10 mm (preferably 2 to 5 mm). If the color grain is such a size, it is effective in terms of pattern formation.

  In the present invention, the color particles as described above are mixed with an aqueous coating material, and then the coating material is applied to a substrate. The mixing of the color particles with the water-based coating material is sufficient as long as the color particles are uniformly dispersed while maintaining the state (shape) of the color particles in the water-based coating material. Do. At this time, even if some of the color grains are detached and dispersed in the aqueous coating material, there is no problem as long as the target polychromaticity is not impaired. The mixing of the color grains may be performed before or during painting. The mixing amount of the color particles can be appropriately set according to the desired pattern, but is usually about 0.1 to 100% by weight (preferably 1 to 50% by weight) with respect to the aqueous coating material. In the present invention, one kind of color grain may be used, or two or more kinds of color grains having different hues may be used.

In this invention, the coating material which mixed the above color particles with respect to a base material is apply | coated to a base material, and the coating surface is finished with a trowel. In the present invention, when performing the iron finishing in this step, the softened color particles are dragged to the iron while being crushed, so that a streak pattern is formed. In addition, since the color grains are crushed while being appropriately blended with the aqueous coating material, the boundary between the patterns of the color grains is a natural finish. Further, in this step, the coated surface can be leveled with a trowel, so that a smooth finish can be obtained.
As the iron in this step, for example, a gold iron, a wooden iron, etc. can be used. In addition, when apply | coating a coating material to a base material (distribution coating), of course, although a trowel can be used, other methods, for example, spraying, roller coating, etc., can also be employ | adopted.

The amount of coating at the time of coating is not particularly limited and can be set as appropriate. Usually, it may be about 0.5 to 8 kg / m 2 (preferably about 1 to 5 kg / m 2). At the time of coating, the viscosity of the coating material can be appropriately adjusted by diluting with water or the like. The dilution ratio is usually about 0 to 10% by weight.
The coating and drying of the coating material may usually be performed at room temperature (about 5 to 40 ° C.). When various uneven patterns are formed on the finished surface, the coated surface may be treated with a roller, a trowel, a brush, a comb, a spatula or the like before drying the coating film.

In the present invention, a clear paint, a water repellent, or the like can be applied as necessary after the application of the aqueous coating material. Among these, examples of the clear paint include acrylic resin-based paints, urethane resin-based paints, epoxy resin-based paints, acrylic silicon resin-based paints, and fluororesin-based paints. Such a clear paint can also adjust the degree of gloss by blending a matting agent or the like. Moreover, as long as the effect of this invention is not inhibited, coloring can also be given. As the water repellent, those having an alkoxysilane compound, a silicone resin or the like as a main component can be used.
As a method of applying such a clear paint or water repellent, a known method can be employed, and for example, spray coating, roller coating, brush coating, or the like can be employed.

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

[Manufacture of water-based coating materials]
200 parts by weight of binder (solid content 50 wt%, acrylic resin emulsion with glass transition temperature 20 ° C., medium: water), aggregate (light yellow aggregate: light red aggregate: white aggregate = 2: 1: 4) (Mixture, particle size 0.08 to 0.25 mm) 600 parts by weight, film forming aid 10 parts by weight, thickener 12 parts by weight, water 50 parts by weight, defoaming agent 3 parts by weight are uniformly mixed by a conventional method. 5 kg of an aqueous coating material (hereinafter referred to as “coating material A”) was produced. The hues of the dried coating film of the coating material A were L ^* = 78.4, a ^* = 3.6, and b ^* = 15.9.

[Manufacture of colored grains]
200 parts by weight of binder (solid content 50% by weight, acrylic resin emulsion having a glass transition temperature of 20 ° C., medium: water), aggregate (yellow aggregate: red aggregate: white aggregate = 2: 1: 2 mixture, (Particle size 0.08 to 0.25 mm) 2000 parts by weight, silica powder (particle size 5 to 20 μm, oil absorption 200 ml / 100 g) 200 parts by weight, film-forming aid 10 parts by weight, thickener 8 parts by weight, water 60 Part by weight and 3 parts by weight of an antifoaming agent were uniformly mixed by a conventional method to produce 1 kg of a color particle coating material.
The color particle coating material was sprayed sparsely on the release paper, dried at room temperature (23 ° C.) for 3 days, and then removed from the release paper to obtain flat color particles having a particle diameter of 2 to 6 mm. The hue of this color grain was L ^* = 64.1, a ^* = 10.7, b ^* = 19.6, and the color difference ΔE with respect to the coating material A was 16.4. Further, the hardness of this color grain by a spring type hardness tester (A type) was 80 degrees, and the hardness after 10 minutes of water immersion was 1 degree or less.

[Pattern formation]
250 g of the color particles were added to 5 kg of the coating material A, and the mixture was stirred for 1 minute with a low-speed stirrer (rotation speed: 500 rpm), and mixed so that the color particles were not crushed and were uniformly dispersed. This coating material was distributed on a 900 × 900 mm plywood with a trowel at a coating amount of 1.5 kg / m 2, and then the coated surface was rubbed with a trowel to make it almost smooth and dried at room temperature for 24 hours. By the above method, a pattern surface in which brown streaks were scattered was formed on the surface based on beige.

Claims (1)

With respect to an aqueous coating material containing a binder, an aggregate, and an aqueous medium, a color particle having a hue different from that of the aqueous coating material and having softness to water is maintained while maintaining the state of the color particle. were mixed so as to uniformly dispersed in, denoted by coating the aqueous coating material to a substrate obtained by mixing, it dragged while collapse color particle squeezes the coated surface with iron, the streak-like pattern A method for forming a pattern surface, wherein the pattern surface is finished so as to be formed smoothly .