Decorative coating material

Abstract

To provide a decorative coating material which is excellent in natural stone-like beauty and can be formed light and thin.SOLUTION: The decorative coating material is obtained by dispersing colored gel particles in a medium, wherein the colored gel particles comprise a synthetic resin emulsion, a gel-forming substance, a coloring pigment and a lightweight granular material having an average particle diameter of ≥ 50 μ m, and the content of the lightweight granular material ≥ the content of the coloring pigment is satisfied.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a decorative coating material that can be applied to the interior and exterior wall surfaces of buildings. [Background technology]

[0002] In recent years, as more and more sophisticated buildings and civil engineering structures are being designed, their walls are being coated with natural stone-like decorative coatings that express the aesthetic appeal of natural stone, rock, sand, etc.

[0003] [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-078288 [Patent Document 2] Japanese Patent Application Publication No. 2019-038905 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, Patent Document 1 describes a sand-wall-shaped water-based paint composition containing aggregates having an average particle size of 100 μm or more and less than 250 μm, aggregates having an average particle size of 700 μm or more and less than 1200 μm, pigments, etc. However, such decorative coating films tend to be heavy because they contain a high proportion of natural stone, etc. Furthermore, decorative coating films are often made thick to impart aesthetic qualities such as a natural stone look, and in such cases the resulting decorative coating films also tend to be heavy.

[0006] On the other hand, for example, Patent Document 2 describes a colored aggregate-containing multicolor paint that is made up of a dispersion and gel particles that are made up of a synthetic resin emulsion and a colored aggregate. However, multicolor paints such as those described in Patent Document 2 may lack coloring properties and are significantly affected by the hue of the base. In order to conceal the base with such multicolor paints, the coating film must be thick, resulting in a heavy coating film. [Means for solving the problem]

[0007] The inventors of the present invention conducted extensive research to solve these problems and discovered that a decorative coating material containing a specific amount of synthetic resin emulsion, gel-forming substance, color pigment, and lightweight powder particles with an average particle size of 50 μm or more in a medium can form a light, thin coating film with an excellent natural stone-like appearance, leading to the completion of the present invention.

[0008] That is, the present invention has the following features. 1. A decorative coating material in which colored gel particles are dispersed in a medium, The colored gel particles are made of a synthetic resin emulsion, a gel-forming substance, and a color pigment. , light quantity of powder and granules, and powders and granular materials Including, The unit volume mass of the lightweight powder or granule is 0.1 kg / L or more and 0.8 kg / L or less, The lightweight powder has an average particle diameter of 50 μm or more and 1000 μm or less, The average particle size of the color pigment is 10 nm or more and 1 μm or less, The unit volume mass of the powder or granule is more than 0.8 kg / L and not more than 4.0 kg / L, A decorative coating material characterized by satisfying the following formula (1): (1) Lightweight powder content (weight) ≧Color pigment content (weight) 2. The decorative coating material according to 1., characterized in that the following formula (2) is satisfied: (2) 60 or more light powder content (weight) / Coloring pigment content (weight) ≧1 3. The decorative coating material according to 1., characterized in that the mixing ratio (weight ratio) of the lightweight powder and the powder is 100:10 to 100:400. [Effects of the Invention]

[0009] The decorative coating material of the present invention is characterized by its ability to form a light, thin coating film that has an excellent natural stone-like aesthetic and textured appearance. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described.

[0011] The present invention is a decorative coating material in which colored gel particles are dispersed in a medium, and the colored gel particles are characterized by containing a synthetic resin emulsion, a gel-forming substance, a color pigment, and lightweight powder particles with an average particle diameter of 50 μm or more.

[0012] [Colored gel particles] The colored gel particles of the present invention are characterized by comprising a synthetic resin emulsion, a gel-forming substance, a color pigment, and lightweight powder particles having an average particle size of 50 μm or more.

[0013] (Synthetic resin emulsion) The synthetic resin emulsion is not particularly limited, but for example, one obtained by emulsion polymerization of a group of monomers containing alkyl (meth)acrylate monomers as the main component can be used. Examples of the (meth)acrylic acid alkyl ester monomer include: Methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-propyl (meth)acrylate, i-butyl (meth)acrylate, n-butyl (meth)acrylate, sec-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-hexyl (meth)acrylate, octyl (meth)acrylate, lauryl (meth)acrylate , stearyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate, trifluoroethyl (meth)acrylate, n-amyl (meth)acrylate, isoamyl (meth)acrylate, t-amyl (meth)acrylate, oxatyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, dodecenyl (meth)acrylate, octadecyl (meth)acrylate, phenyl (meth)acrylate , isobornyl (meth)acrylate, benzyl (meth)acrylate, 2-phenylethyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 4-methoxybutyl (meth)acrylate, cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, methylcyclohexyl (meth)acrylate, t-butylcyclohexyl (meth)acrylate, hydroxymethylcyclohexyl (meth)acrylate, cyclooctyl (meth)acrylate, cyclodecyl (meth)acrylate, cyclododecyl (meth)acrylate, 4-tert-butylcyclohexyl (meth)acrylate, tripropylmethyl (meth)acrylate, triisopropylmethyl (meth)acrylate, tributylmethyl (meth)acrylate, triisobutylmethyl (meth)acrylate, tri-t-butylmethyl (meth)acrylate, 4-tert-butylcyclohexyl (meth)acrylate, and the like. Other monomers include: Carboxyl group-containing monomers such as (meth)acrylic acid, crotonic acid, maleic acid, itaconic acid, fumaric acid, isocrotonic acid, salicylic acid, and cinnamic acid; 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 2-hydroxypentyl (meth)acrylate, 4-hydroxypentyl (meth)acrylate, 1-methyl-4-hydroxypentyl (meth)acrylate, 3-ethyl-3-hydroxyhexyl (meth)acrylate, 2-hydroxydecyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, hydroxyl group-containing monomers such as 1-methyl-4-hydroxybutyl (meth)acrylate, 5-hydroxypentyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, 7-hydroxyheptyl (meth)acrylate, 8-hydroxyoctyl (meth)acrylate, 2-methyl-8-hydroxyoctyl (meth)acrylate, 7-methyl-8-hydroxyoctyl (meth)acrylate, 9-hydroxynonyl (meth)acrylate, and 10-hydroxydecyl (meth)acrylate; Alkoxysilyl group-containing monomers such as 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, 3-(meth)acryloxypropylmethyldiethoxysilane, vinyltris(2-methoxyethoxy)silane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriisopropoxysilane, and vinylmethyldimethoxysilane; amide group-containing monomers such as (meth)acrylamide, ethyl (meth)acrylamide, N-ethyl (meth)acrylamide, N-isopropyl (meth)acrylamide, Nn-propyl (meth)acrylamide, N-cyclopropyl (meth)acrylamide, N-(meth)acroylpyrrolidine, N,N-dimethyl (meth)acrylamide, N,N-diethyl (meth)acrylamide, N-methyl-N-ethyl (meth)acrylamide, N-methyl-N-isopropyl (meth)acrylamide, N-methyl-Nn-propyl (meth)acrylamide, N-methylol (meth)acrylamide, N-[3-(dimethylamino)propyl] (meth)acrylamide, vinylamide, N,N-methylenebisacrylamide, diacetone (meth)acrylamide, N-methylol (meth)acrylamide, acrylamidoglycolic acid, methyl acrylamidoglycolate, and dimethoxyhydroxyethyl acrylamide; Alkylene glycol chain-containing monomers such as (methoxy)polyethylene glycol (meth)acrylate, (methoxy)polypropylene glycol (meth)acrylate, (methoxy)polyethylene glycol-polypropylene glycol (meth)acrylate, (methoxy)polyethylene glycol allyl ether, (methoxy)polypropylene glycol allyl ether, and (methoxy)polyethylene glycol-polypropylene glycol allyl ether; amino group-containing monomers such as butylvinylbenzylamine, vinylphenylamine, p-aminostyrene, N,N-dimethylaminoethyl (meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate, N,N-diethylaminopropyl (meth)acrylate, N-[2-(meth)acryloyloxyethyl]piperidine, N-[2-(meth)acryloyloxyethyl]pyrrolidine, N-[2-(meth)acryloyloxyethyl]morpholine, 4-[N,N-dimethylamino]styrene, 4-[N,N-diethylamino]styrene, 2-vinylpyridine, and 4-vinylpyridine; glycidyl group-containing monomers such as glycidyl (meth)acrylate, diglycidyl fumarate, 3,4-epoxycyclohexyl (meth)acrylate, 3,4-epoxyvinylcyclohexane, allyl glycidyl ether, ε-caprolactone-modified glycidyl (meth)acrylate, and β-methylglycidyl (meth)acrylate; carbonyl group-containing monomers such as diacetone (meth)acrylate, diacetone (meth)acrylamide, acrolein, vinyl methyl ketone, vinyl ethyl ketone, vinyl (iso)butyl ketone, acetonyl acrylate, acryloxyalkyl propanals, methacryloxyalkyl propanals, 2-hydroxypropyl acrylate acetyl acetate, tandiol acrylate acetyl acetate, acetoacetoxyethyl (meth)acrylate, and acetoacetoxyallyl ester; nitrile group-containing monomers such as (meth)acrylonitrile; isocyanate group-containing monomers such as methacryloyl isocyanate; oxazoline group-containing monomers such as vinyloxazoline, 2-vinyl-2-oxazoline, and 2-propenyl-2-oxazoline; hydrazino group-containing monomers such as propylene-1,3-dihydrazine and butylene-1,4-dihydrazine; Acetoacetoxyl group-containing monomers such as acetoacetoxyethyl (meth)acrylate and acetoacetoxyallyl ester; Methylol group-containing monomers such as N-methylol (meth)acrylamide, vinylidene halide monomers such as vinylidene fluoride; Aromatic vinyl monomers such as styrene, 2-methylstyrene, chlorostyrene, vinyltoluene, t-butylstyrene, vinylanisole, and vinylnaphthalene; Sulfonic acid-containing monomers such as styrene sulfonic acid and vinyl sulfonic acid, benzophenone-based monomers such as 2-hydroxy-4-(meth)acryloxybenzophenone, 2-hydroxy-5-(meth)acryloxybenzophenone, 2-hydroxy-4-{(meth)acryloxy-ethoxy}benzophenone, 2-hydroxy-4-{(meth)acryloxy-diethoxy}benzophenone, and 2-hydroxy-4-{(meth)acryloxy-triethoxy}benzophenone; benzotriazole-based monomers such as 2-{2'-hydroxy-5'-(meth)acryloxyethylphenyl}-2H-benzotriazole, 2-{2'-hydroxy-5'-(meth)acryloxyethyl-3-t-butylphenyl}-2H-benzotriazole, and 3-(meth)acryloyl-2-hydroxypropyl-3-{3'-(2''-benzotriazole)-4-hydroxy-5-t-butyl}phenylpropionate; 4-(meth)acryloyloxy-2,2,6,6-tetramethylpiperidine, 4-(meth)acryloylamino-2,2,6,6-tetramethylpiperidine, 4-(meth)acryloyloxy-1,2,2,6,6-pentamethylpiperidine, 4-(meth)acryloylamino-1,2,2,6,6-pentamethylpiperidine, 4-cyano-4-(meth)acryloylamino-2,2,6,6-tetramethylpiperidine, 1-(meth)acryloyl - piperidine-based monomers such as 4-(meth)acryloylamino-2,2,6,6-tetramethylpiperidine, 1-(meth)acryloyl-4-(meth)acryloylamino-2,2,6,6-tetramethylpiperidine, 4-crotonoyloxy-2,2,6,6-tetramethylpiperidine, 4-crotonoylamino-2,2,6,6-tetramethylpiperidine, and 1-crotonoyl-4-crotonoyloxy-2,2,6,6-tetramethylpiperidine; Ethylene, propylene, isoprene, butadiene, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl pivalate, vinyl versatate, vinyl ether, vinyl ketone, One or more of these can be used. In the present invention, acrylic and methacrylic are collectively referred to as (meth)acrylic. Furthermore, a monomer is a general term for a compound having a polymerizable unsaturated double bond.

[0014] Any known polymerization method may be employed, and in addition to ordinary emulsion polymerization, soap-free emulsion polymerization, feed emulsion polymerization, seed emulsion polymerization, etc. may also be employed. During polymerization, emulsifiers, initiators, polymerization inhibitors, polymerization retarders, buffers, chain transfer agents, crosslinking agents, coupling agents, catalysts, etc. may also be used. Among these, emulsifiers include anionic emulsifiers, cationic emulsifiers, nonionic emulsifiers, amphoteric emulsifiers, etc., and can be appropriately selected from non-reactive and reactive emulsifiers. Among these, nonionic emulsifiers, particularly nonionic reactive emulsifiers, are preferred in terms of stability over time, water resistance, weather resistance, etc.

[0015] The glass transition temperature of the synthetic resin emulsion can be adjusted by selecting the types of the monomers, the mixing ratio, etc. This glass transition temperature may be set appropriately taking into consideration the final use, etc., and is preferably about -20 to 80°C, more preferably about -10 to 60°C. The glass transition temperature can be calculated using Fox's formula. Furthermore, the synthetic resin emulsion that can be suitably used has a solid content of 10% by weight or more and 60% by weight or less, and more preferably 30% by weight or more and 55% by weight or less.

[0016] (gel-forming substance) The gel-forming substance is a component that contributes to the gelation of the colored gel particles. As the gel-forming substance, for example, substances known in multicolor pattern paints can be used. Specific examples include polyvinyl alcohol, poly(meth)acrylic acid, polyethylene oxide, water-soluble urethane, biogum or its derivatives, galactomannan or its derivatives, alginic acid or its derivatives, cellulose derivatives, gelatin, casein, albumin, etc., or chemically modified versions of these substances by oxidation, methylation, carboxymethylation, hydroxyethylation, hydroxypropylation, sulfation, phosphorylation, cationization, etc., and one or more of these can be used. The mixing ratio of the gel-forming substance is preferably 0.01 to 30 parts by weight, more preferably 0.05 to 20 parts by weight, per 100 parts by weight of the synthetic resin emulsion.

[0017] (color pigments) Examples of color pigments include titanium oxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chromium black, cobalt black, copper manganese iron black, red iron oxide, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene red, quinacridone red, yellow iron oxide, titanium yellow, fast yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine blue, Prussian blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, aluminum pigments, and pearl pigments, and these can be used alone or in combination of two or more. The average particle size of the color pigment is not particularly limited, but is preferably 1 μm or less (more preferably 10 nm or more and 800 nm or less). The average particle size of the color pigment is a value measured using a laser diffraction particle size distribution measuring device.

[0018] (lightweight powder) The lightweight granular material can have an average particle size of 50 μm or more (preferably 50 μm to 1000 μm, more preferably 60 μm to 500 μm, and even more preferably 70 μm to 300 μm). By incorporating such lightweight granular material into the colored gel particles, it is possible to form a light, thin coating film with excellent aesthetics. In addition, the coating film surface can be given a textured appearance. If the average particle size is too small, the aesthetic appearance of natural stone, sand wall, etc. cannot be obtained, and the textured feel cannot be obtained. Examples of the lightweight powder or granule include shirasu balloons, glass balloons, perlite, pumice, hollow balloons, etc., and one or more of these can be used. The unit volume mass of the lightweight powder or granule is preferably 0.1 kg / L or more and 0.8 kg / L or less (more preferably 0.2 kg / L or more and 0.6 kg / L or less). The average particle size of lightweight granular materials is a value obtained by sieving them using a metal mesh sieve specified in JIS Z8801-1:2000 and calculating the average value of the weight distribution. The unit volume mass of lightweight granular materials can be measured in accordance with JIS A1104:2019.

[0019] The present invention is characterized in that the content of the color pigment and the content of the lightweight powder / granule satisfy the following formula (1). (1) The content of light powders is equal to or greater than the content of color pigments. By satisfying formula (1), the coating can have a natural stone-like appearance and a textured appearance, and can also form a light, thin coating film. Note that the lightweight powder content and color pigment content shown here refer to the lightweight powder content in the color gel particles and the color pigment content in the color gel particles. Furthermore, in the present invention, it is preferable to satisfy the following formula (2), and more preferably formula (3). (2) 60 ≧ Lightweight powder content / Color pigment content ≧ 1 (3) 60 ≧ Lightweight powder content / Color pigment content ≧ 2 By satisfying formulas (2) and (3), the natural stone-like aesthetic appearance and textured appearance are improved, and a light, thin coating film can be formed.

[0020] The amount of the color pigment to be mixed is, for example, preferably 0.05 to 20 parts by weight, more preferably 0.1 to 15 parts by weight, even more preferably 0.3 to 12 parts by weight, and most preferably 0.5 to 10 parts by weight, per 100 parts by weight of the synthetic resin emulsion. The amount of the lightweight powder or granules to be mixed is, for example, preferably 1 part by weight or more and 500 parts by weight or less, more preferably 2 parts by weight or more and 300 parts by weight or less, and even more preferably 3 parts by weight or more and 100 parts by weight or less, per 100 parts by weight of the synthetic resin emulsion. The amounts of color pigment and lightweight powder shown here refer to the amounts of color pigment and lightweight powder in the colored gel particles relative to 100 parts by weight of the synthetic resin emulsion in the colored gel particles.

[0021] (Other ingredients) In addition to the above-mentioned components, the colored gel particles may also contain commonly used additives, such as powders, thickeners, dispersants, dyes, fibers, leveling agents, wetting agents, plasticizers, film-forming aids, antifreeze agents, pH adjusters, preservatives, antifungal agents, anti-algae agents, antibacterial agents, antifoaming agents, fragrances, light stabilizers, UV absorbers, photocatalysts, crosslinking agents, flame retardants, solvents, and water, which may be added to the extent that the effects of the present invention are not impaired.

[0022] In the present invention, the colored gel particles may contain a powder different from the lightweight powder. Examples of powders and granules include heavy calcium carbonate, kansui stone, light calcium carbonate, white carbon, talc, mica, kaolin, clay, china clay, diatomaceous earth, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica stone powder, quartz powder, resin beads, and glass beads, and one or more of these can be used. Such powder particles can impart a natural stone-like aesthetic appearance and also prevent the colored gel particles from becoming too light due to the lightweight powder particles, thereby preventing the colored gel particles from floating during storage or after application. In particular, in the present invention, the unit volume mass of the powder or granule is preferably more than 0.8 kg / L and not more than 4.0 kg / L (even more preferably 1.0 kg / L or more and not more than 3.5 kg / L). The average particle size of the powder or granule is not particularly limited, but is preferably 200 μm or less (more preferably 1 μm or more and 150 μm or less, and even more preferably 2 μm or more and less than 120 μm). The average particle size of the powder or granule is a value measured using a laser diffraction particle size distribution measuring device. When such powder or granules are contained in the colored gel particles, the amount of the powder or granules mixed is not particularly limited, but is, for example, preferably 0.1 to 300 parts by weight, more preferably 1 to 200 parts by weight, per 100 parts by weight of the synthetic resin emulsion. The mixing ratio (weight ratio) of the lightweight powder and the powder is preferably 100:10 to 100:400, more preferably 100:20 to 100:200.

[0023] Examples of thickeners include clay mineral thickeners such as bentonite, montmorillonite, hectorite, beidellite, saponite, nontronite, volconescoite, sauconite, stevensite, fluorohectorite, laponite, rectorite, vermiculite, illite, makatite, kanemite, illielite, magadiite, kenyaite, sepiolite, and palygorskite, cellulose thickeners, polyacrylic acid thickeners, swellable silica thickeners, and urethane thickeners, and one or more of these may be used.

[0024] [Medium] The medium disperses the colored gel particles. The medium is not particularly limited, but is preferably an aqueous medium containing water, and may be a mixture of water and an aqueous solvent. The aqueous solvent may be a mixture of, for example, alcohols such as methanol, ethanol, propanol, butanol, and 2-ethyl-1-hexanol, glycols such as ethylene glycol and propylene glycol, ethers such as ethylene glycol mono-2-ethylhexyl ether, diethylene glycol mono-2-ethylhexyl ether, and diethylene glycol dibutyl ether, and esters such as 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate.

[0025] Furthermore, the medium may contain commonly used additives such as gelling agents, powders, dyes, dispersants, fibers, thickeners, leveling agents, wetting agents, plasticizers, film-forming aids, antifreeze agents, pH adjusters, preservatives, antifungal agents, anti-algae agents, antibacterial agents, antifoaming agents, fragrances, light stabilizers, ultraviolet absorbers, photocatalysts, crosslinking agents, flame retardants, solvents, etc., within the range that does not impair the effects of the present invention. The medium may also contain the above-mentioned synthetic resin emulsion. When a synthetic resin emulsion is contained, the solid content of the synthetic resin emulsion is preferably 10 to 100 parts by weight, more preferably 30 to 80 parts by weight, per 100 parts by weight of the medium. Note that water, aqueous solvents, etc. present in the synthetic resin emulsion are calculated as part of the medium.

[0026] (gelling agent) In the present invention, it is preferable that the medium contains a gelling agent. The gelling agent, together with the gel-forming substance described above, is a component that contributes to the gelation of the colored gel particles. Examples of gelling agents include sulfates, acetates, organic acid salts, silicates, borates, nitrates, chlorides, hydroxides, etc. of metals such as magnesium, calcium, barium, aluminum, lithium, sodium, potassium, zinc, iron, zirconium, chromium, tin, silver, copper, etc.; inorganic salts such as hydrochloric acid, sulfuric acid, nitric acid, boric acid, etc., or salts thereof; organic acids such as citric acid, lactic acid, tannic acid, etc., or salts thereof; clays, etc.; and one or more of these may be used. The ratio of the gelling agent in the medium is preferably 0.01 to 5.0% by weight, more preferably 0.03 to 3.0% by weight, and even more preferably 0.05 to 2.0% by weight. When the medium contains a synthetic resin emulsion, the water and aqueous solvent in the synthetic resin emulsion are calculated as part of the medium.

[0027] (powder) In the present invention, it is preferable that the medium contains powder or granular material. The powder particles in the medium are not particularly limited as long as they have an average particle size of 200 μm or less (more preferably 1 μm or more and 150 μm or less, and even more preferably 2 μm or more and less than 120 μm). By including such powder particles in the medium, the design of the colored gel particles can be made more prominent, and the colored gel particles are prevented from collapsing when mixed or stirred, and also when painted, and painting workability can be improved. The average particle size of the powder or granule is a value measured using a laser diffraction particle size distribution measuring device. Examples of powder particles in the medium include heavy calcium carbonate, kansui stone, light calcium carbonate, white carbon, talc, mica, kaolin, clay, china clay, diatomaceous earth, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica stone powder, quartz powder, resin beads, glass beads, etc., and one or more of these can be used. Furthermore, the light powder or granule, the color pigment, or powder or granule having an average particle size of more than 200 μm (preferably 250 μm or more to 5 mm or less) may be contained to the extent that the effect of the present invention is not impaired. The ratio of the powder particles in the medium is preferably 0.1 to 25% by weight, more preferably 0.3 to 20% by weight, and even more preferably 0.5 to 15% by weight. When the medium contains lightweight powder, the ratio of the lightweight powder in the medium is preferably 0.01 to 20% by weight, more preferably 0.05 to 15% by weight, and even more preferably 0.1 to 10% by weight. When the medium contains a color pigment, the ratio of the color pigment in the medium is preferably 0.01 to 10% by weight, more preferably 0.05 to 8% by weight, and even more preferably 0.1 to 5% by weight.

[0028] [Decorative coating materials] The decorative coating material of the present invention can be produced by adding a mixture containing the components that form colored gel particles, namely, a synthetic resin emulsion, a gel-forming substance, a color pigment, and lightweight powder particles with an average particle size of 50 μm or more, to a medium and gelling the mixture. For the formation of colored gel particles, a method known for multicolor paints can be used, for example. The mixing ratio (weight ratio) of the components forming the colored gel particles to the medium is preferably 100:50 to 100:200, and more preferably 100:70 to 100:150.

[0029] The shape of the colored gel particles is not particularly limited, and various shapes such as spherical, flat, thread-like, etc. The average particle size of the colored gel particles is preferably about 0.01 to 10 mm, more preferably about 0.1 to 5 mm. The desired shape and particle size of the colored gel particles can be obtained by appropriately setting and adjusting the shape of the stirring blade, the size and position of the stirring blade relative to the stirring vessel, the rotation speed of the stirring blade, and the concentration or viscosity of each component.

[0030] The colored gel particles may be of one type only, or may contain two or more types. For example, when two types of colored gel particles are contained, the composition can be produced by a method in which a component that forms the first colored gel particles is added to a medium to cause gelation, and then a component that forms the second colored gel particles is added to cause gelation; a method in which the components that form the first and second colored gel particles are simultaneously added to a medium to cause gelation; or a method in which decorative coating materials in which colored gel particles are dispersed in a medium are each produced and then the respective decorative coating materials are mixed together. Furthermore, in the present invention, when two or more types of colored gel particles are contained, at least one of them satisfies the above formula (1) (preferably also satisfies formula (2), more preferably also satisfies formula (3)), and it is preferable that two or more types, or even all of the colored gel particles, satisfy the above formula (1) (preferably also satisfies formula (2), more preferably also satisfies formula (3)). In addition, if each colored gel particle does not satisfy the above formula (1), but the sum of the components of each colored gel particle satisfies the above formula (1), this is not included in the provisions of the present invention.

[0031] (Decorative coating method) The decorative coating material of the present invention can be used for various purposes, such as architecture, building materials, civil engineering, woodworking, plastic products, metal products, and non-ferrous metal products. Specifically, it can be used as a surface decorative material for various substrates, such as concrete, mortar, siding boards, extruded boards, gypsum boards, perlite boards, plywood, plastic boards, metal boards, glass, and porcelain tiles. The surfaces of these substrates may have been subjected to some kind of surface treatment (e.g., sealer, surfacer, filler, etc.), or may already have a coating film formed thereon.

[0032] When applying the coating, various coating tools such as a spray, roller, brush, etc. can be used. The amount of water to be added may be appropriately determined taking into consideration the type of coating equipment, the condition of the substrate, the temperature during coating, etc. The amount of the composition of the present invention to be applied is preferably 0.2 to 5.0 kg / m 2 , more preferably 0.3 to 4.0 kg / m 2, and more preferably 0.4 to 3.0 kg / m 2 , and particularly preferably 0.5 to 2.0 kg / m 2 is. The coating amount in terms of solid content is preferably 0.1 to 3.0 kg / m 2 , more preferably 0.15 to 2.0 kg / m 2 , and more preferably 0.2 to 1.0 kg / m 2 , and particularly preferably 0.25 to 0.8 kg / m 2 is. After application, the composition of the present invention is preferably dried at room temperature, but can also be dried with heating. The drying time is preferably 1 to 5 hours at room temperature. The composition of the present invention can be suitably used to form a top coating film, and if necessary, a clear coat or the like can be applied after the composition of the present invention has been applied. [Example]

[0033] The following examples will be given to clarify the features of the present invention, but the present invention is not limited to these examples.

[0034] Example 1

[0035] A medium was produced by mixing the raw materials shown in Table 1 with the formulation shown in Table 2, and a mixture of components for forming colored gel particles was added to the medium, mixed and stirred, to produce colored gel particle dispersion 1. Next, colored gel particle dispersion 2 was prepared in the same manner. Furthermore, the colored gel particle dispersion 1 and the colored gel particle dispersion 2 were mixed in a weight ratio of 50:50 to obtain a decorative coating material 1. The resulting decorative coating material 1 was subjected to the following tests.

[0036] (Paintability (lightweight) test) The resulting decorative coating material 1 was applied to a slate board that had previously been coated with a primer (gray color) and placed vertically. The slate board was then coated with a roller in an amount of approximately 1.3 kg / m. 2 (Solid content equivalent: 0.4 kg / m2 ) to obtain test specimens. The resulting painted surface was visually inspected and evaluated for paintability as follows: The evaluation results are shown in Table 3. 4: No sagging due to its own weight was observed 3: There was almost no sagging due to its own weight. 2: Some sagging occurred due to its own weight. 1: Dripping due to its own weight was noticeable

[0037] (Aesthetics test) The test specimens obtained in the paintability test were left to stand at room temperature (23°C, 50% relative humidity) for 24 hours, after which the coating surface was visually observed and evaluated. The evaluation results are shown in Table 3. (Natural stone feel) 4: A coating film with a natural stone-like appearance was obtained 3: A coating film with a natural stone-like appearance was obtained 2: The design lacks a natural stone look. 1: It lacked the natural stone look. (Uneven feeling) 4: A coating film with excellent texture was obtained 3: A coating film with a rough texture was obtained 2: The design is somewhat lacking in texture. 1: It lacked texture

[0038] (Examples 2 to 17, Comparative Examples 1 to 3) Using the raw materials shown in Table 1 and the compositions shown in Tables 2 and 3, decorative coating materials were obtained in the same manner as in Example 1. The resulting decorative coating material was subjected to the same tests as in Example 1. The evaluation results are shown in Table 3.

[0039] [Table 1]

[0040] [Table 2]

[0041] Table 3

Claims

1. A decorative coating material in which colored gel particles are dispersed in a medium, The colored gel particles include a synthetic resin emulsion, a gel-forming substance, a color pigment, a lightweight powder, and a powder; The lightweight powder has a unit volume mass of 0.1 kg / L or more and 0.8 kg / L or less, The lightweight powder has an average particle diameter of 50 μm or more and 1000 μm or less, The average particle size of the color pigment is 10 nm or more and 1 μm or less, The unit volume mass of the powder or granule is more than 0.8 kg / L and not more than 4.0 kg / L, A decorative coating material characterized by satisfying the following formula (1): (1) The content (weight) of the lightweight powder or granule is equal to or greater than the content (weight) of the color pigment.

2. 2. The decorative coating material according to claim 1, wherein the following formula (2) is satisfied: (2) 60 ≧ Lightweight powder content (weight) / Color pigment content (weight) ≧ 1

3. A decorative coating material as described in claim 1, characterized in that the mixing ratio (weight ratio) of the lightweight powder and the powder is 100:10 to 100:400.

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