Matte multicolored pattern coating composition, matte multicolored pattern coating film, article, and building

Abstract

To provide a matte multicolor pattern coating composition or the like capable of obtaining a coating film (matte multicolor pattern coating film) which hardly causes performance deterioration or the like while having low gloss.SOLUTION: A matte multicolored pattern coating composition includes a clear coating material containing a synthetic resin, colored gel particles dispersed in the clear coating material, and resin beads dispersed in the clear coating material, wherein the synthetic resin has a glass transition temperature of - 5 to 40 °C., and the resin beads have an average particle diameter of 3 to 120 μ m, have two or more peaks in a particle size distribution, and are contained in an amount of 5 to 40% by weight in 100% by weight of a solid content of the matte multicolored pattern coating composition.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to matte multicolor paint compositions, matte multicolor paint films, articles and buildings. [Background technology]

[0002] In recent years, paints containing colored gel particles, such as multicolored paints, have been increasingly used as finishing materials for the exteriors (for example, walls and roofs) and interiors of buildings.

[0003] Here, multicolor paint is a paint in which gel particles of two or more colors (colored gel particles of two or more colors) are suspended, and has the characteristic of being able to create a scattered color pattern with a single application (JIS K 5667). The colored gel particles used in multicolor paint have traditionally been composed of a resin (resin emulsion), a pigment, and a hydrogel. Such multicolor paint is described, for example, in Patent Document 1 below.

[0004] Patent Document 1 describes "colored polymer granules that can be obtained by dropping a thermosensitive gelling emulsion composition containing (i) an aqueous synthetic resin emulsion, (ii) a thermosensitive gelling agent, and (iii) a colorant into water having a temperature equal to or higher than the gelling temperature of the composition, thereby causing gelation," and goes on to say that this makes it possible to "provide an aqueous multicolor pattern paint composition that is suitable for various painting methods such as spray, roller, and brush." [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-041196 Summary of the Invention [Problem to be solved by the invention]

[0006] By applying such multicolored paint, it is possible to achieve a glossy scattered pattern. However, in recent years, as values ​​regarding the exterior of homes have diversified, designs that intentionally reduce gloss to give a sense of calm and dignity have become more popular.

[0007] One way to reduce gloss is to add a matte material that scatters light to the multicolored paint. However, increasing the amount of matte material added in pursuit of low gloss can lead to performance degradation, such as a deterioration in the weather resistance of the paint film (dry paint film) and a decrease in the elongation of the paint film, as well as appearance issues such as a decrease in color saturation due to white blur.

[0008] The present invention has been made with the above-mentioned matters in mind, and aims to provide a matte multicolor pattern coating composition that can give a coating film (matte multicolor pattern coating film) that has low gloss but is resistant to performance degradation, etc. [Means for solving the problem]

[0009] In order to solve the above problems, a matte multicolored pattern paint composition has been developed, which comprises a clear paint, colored gel particles dispersed in the clear paint, and resin beads dispersed in the clear paint. Specific embodiments are listed below.

[0010] (Embodiment 1) A matte multicolor paint composition comprising a clear paint containing a synthetic resin, colored gel particles dispersed in the clear paint, and resin beads dispersed in the clear paint, wherein the synthetic resin has a glass transition temperature of -5 to 40°C, and the resin beads have an average particle diameter of 3 to 120 μm and have two or more peaks in the particle size distribution, and are contained in an amount of 5 to 40 wt% per 100 wt% solids content of the matte multicolor paint composition. "Particle size distribution" is determined by laser diffraction and scattering. Note that the "particle size distribution" referred to here is a histogram in which the size of one particle is expressed as a single value on the horizontal axis and the frequency on the vertical axis. "Average particle size" refers to the particle size at 50% of the cumulative value in the particle size distribution determined by laser diffraction and scattering.

[0011] This matte multicolor paint composition has resin beads dispersed in the clear paint that have an average particle diameter of 3 to 120 μm and have two or more peaks in the particle size distribution, and are contained in an amount of 5 to 40 wt% relative to 100 wt% of the solid content of the multicolor paint composition.This allows the surface of the paint film after drying to effectively scatter incident light, resulting in a low-gloss paint film. Furthermore, since the glass transition temperature of the synthetic resin contained in the clear coating is −5 to 40° C., deterioration of weather resistance (for example, resin beads falling off) and reduction in coating film elongation are unlikely to occur.

[0012] (Embodiment 2) The matte multicolor paint composition according to embodiment 1, wherein the resin beads are a mixture of multiple element beads having different average particle sizes, and each of the multiple element beads has an average particle size of 3 to 120 μm. The plurality of element beads constitute a resin bead, and each is made of resin.

[0013] This matte multicolor paint composition also produces a coating film that is low in gloss and is resistant to deterioration in weather resistance, reduction in coating film elongation, etc. Furthermore, by mixing multiple element beads with different average particle sizes, it is relatively easy to obtain resin beads with multiple peaks in the particle size distribution.

[0014] (Aspect 3) The colored gel particles have a bulk density of 0.01 to 0.5 g / cm 3 The matte multicolor paint composition of embodiment 1 or embodiment 2, comprising a lightweight aggregate.

[0015] This matte multicolor paint composition provides a coating film with even lower gloss.

[0016] (Aspect 4) The matte multicolor paint composition according to Aspect 3, wherein the lightweight aggregate is contained in an amount of 0.1 to 10% by weight based on 100% by weight of the solid content of the matte multicolor paint composition.

[0017] This matte multicolor paint composition provides a coating film with even lower gloss.

[0018] (Aspect 5) The matte multicolor paint composition according to Aspect 3 or Aspect 4, wherein the lightweight aggregate is made of resin.

[0019] This matte multicolor paint composition provides a coating film with even lower gloss. In addition, the coating film elongation is less likely to decrease. It is more preferable that the lightweight aggregate is made of foamed resin.

[0020] (Embodiment 6) A matte multicolor paint composition comprising a clear paint containing a synthetic resin, colored gel particles dispersed in the clear paint, and resin beads dispersed in the clear paint, wherein the synthetic resin has a glass transition temperature of −5 to 40° C., the resin beads have an average particle diameter of 3 to 120 μm and have two or more peaks in their particle size distribution, and are contained in an amount of 5 to 40% by weight relative to 100% by weight of the solids content of the matte multicolor paint composition, and the colored gel particles have a bulk density of 0.01 to 0.5 g / cm. 3 The matte multicolor paint composition contains a lightweight aggregate, the lightweight aggregate being made of resin and being contained in an amount of 0.1 to 10% by weight relative to 100% by weight of the solid content of the matte multicolor paint composition.

[0021] This matte multicolor paint composition also gives a coating film that is low in gloss and is resistant to deterioration in weather resistance and reduction in coating film elongation.

[0022] (Aspect 7) The matte multicolor paint composition according to any one of Aspects 1 to 6, wherein the colored gel particles are obtained by adding a colored gel raw material composition containing a synthetic resin emulsion or synthetic resin dispersion, a color pigment, and a hydrogel main raw material to an aqueous solution containing a hydrogel insolubilizer.

[0023] This matte multicolor paint composition also gives a coating film that is low in gloss and is resistant to deterioration in weather resistance and reduction in coating film elongation.

[0024] (Embodiment 8) A matte multicolor coating film comprising a synthetic resin, a dried product of colored gel particles dispersed in the synthetic resin, and resin beads dispersed in the synthetic resin, wherein the synthetic resin has a glass transition temperature of -5 to 40°C, and the resin beads have an average particle diameter of 3 to 120 μm and have two or more peaks in the particle size distribution, and are contained in an amount of 5 to 40% by weight within 100% by weight of the matte multicolor coating film.

[0025] This matte multicolored coating film has low gloss, but is also less susceptible to deterioration in weather resistance and reduction in coating film elongation.

[0026] (Aspect 9) The matte multicolor coating film according to Aspect 8, wherein the resin beads are a mixture of multiple element beads having different average particle diameters, and each of the multiple element beads has an average particle diameter of 3 to 120 μm. The plurality of element beads constitute a resin bead, and each is made of resin.

[0027] This matte multicolored coating film also has low gloss, but is less likely to suffer from deterioration in weather resistance or reduction in coating film elongation.

[0028] (Aspect 10) The dried colored gel particles have a bulk density of 0.01 to 0.5 g / cm 3 10. The matte multicolor coating film of claim 8 or 9, comprising a lightweight aggregate.

[0029] This matte multicolored coating film has an even lower gloss.

[0030] (Embodiment 11) The matte multicolor coating film according to embodiment 10, wherein the lightweight aggregate is contained in an amount of 0.1 to 10% by weight based on 100% by weight of the matte multicolor coating film.

[0031] This matte multicolored coating film has an even lower gloss.

[0032] (Embodiment 12) The matte multicolor coating film according to embodiment 10 or 11, wherein the lightweight aggregate is made of resin.

[0033] This matte multicolored coating film is even less susceptible to a decrease in coating film elongation.

[0034] (Aspect 13) A matte multicolored coating film comprising a synthetic resin, a dried product of colored gel particles dispersed in the synthetic resin, and resin beads dispersed in the synthetic resin, wherein the synthetic resin has a glass transition temperature of −5 to 40° C., the resin beads have an average particle size of 3 to 120 μm and have two or more peaks in their particle size distribution, and are contained in an amount of 5 to 40% by weight per 100% by weight of the matte multicolored coating film, and the dried product of the colored gel particles has a bulk density of 0.01 to 0.5 g / cm. 3 The matte multicolored coating film contains lightweight aggregate, which is made of resin and is contained in an amount of 0.1 to 10% by weight in 100% by weight of the matte multicolored coating film.

[0035] This matte multicolored coating film also has low gloss, but is less likely to suffer from deterioration in weather resistance or reduction in coating film elongation.

[0036] (Aspect 14) A matte multicolored coating film according to any one of Aspects 8 to 13, wherein the colored gel particles are obtained by adding a colored gel raw material composition containing a synthetic resin emulsion or dispersion, a colored pigment, and a hydrogel main raw material to an aqueous solution containing a hydrogel insolubilizer.

[0037] This matte multicolored coating film also has low gloss, but is less likely to suffer from deterioration in weather resistance or reduction in coating film elongation.

[0038] (Aspect 15) An article having the matte multicolor coating film according to any one of Aspects 8 to 14 formed thereon. This article is obtained by applying and drying the matte multicolor coating composition according to any one of Aspects 1 to 7.

[0039] This product has a low gloss and creates a calm atmosphere, and is highly durable and suffers little deterioration over time, such as white blurring.

[0040] (Aspect 16) A building having formed thereon the matte multicolor coating film according to any one of Aspects 8 to 14. This building is obtained by applying and drying the matte multicolor coating composition according to any one of Aspects 1 to 7.

[0041] This building has a low gloss finish that creates a calm atmosphere, is highly durable, and is less susceptible to deterioration over time such as white blurring. [Effects of the Invention]

[0042] The present invention can provide a matte multicolor pattern coating composition that can give a coating film (matte multicolor pattern coating film) that is low in gloss but is resistant to performance degradation. DETAILED DESCRIPTION OF THE INVENTION

[0043] The following provides an illustrative description of the matte multicolored paint composition, the matte multicolored paint film, the article, and the building, but the present invention is not limited to the following embodiments.

[0044] 1. Matte multicolored paint composition First, a matte multicolor paint composition will be illustrated. The matte multicolor paint composition contains a clear paint, colored gel particles, and resin beads. Each material will be illustrated below.

[0045] [Clear paint] The clear coating contains a synthetic resin, which may be used in the form of an emulsion, a dispersion, or a water-soluble composition.

[0046] Here, a synthetic resin emulsion is an emulsion in which synthetic resin particles are emulsified and dispersed in water or a water-containing solvent, and a synthetic resin dispersion is a dispersion in which synthetic resin particles are dispersed in water or a water-containing solvent. Generally, both have a milky white appearance. In the paint industry, synthetic resin emulsions and synthetic resin dispersions are sometimes collectively referred to as synthetic resin emulsions without making a strict distinction between them, but in this application they are described as different.

[0047] On the other hand, the water-soluble composition refers to a composition in which a synthetic resin is dissolved in water or a water-containing solvent, and has a transparent or nearly transparent appearance.

[0048] The synthetic resin used for these is not particularly limited. For example, known synthetic resins such as acrylic resin, ethylene-acrylic resin, vinyl acetate-acrylic resin, styrene-acrylic resin, urethane resin, silicone resin, urethane-acrylic resin, and silicone-acrylic resin can be used. Among them, from the viewpoint of weather resistance, it is preferable to use acrylic resin, particularly acrylic silicone resin. For example, acrylic silicone resin and ceramic-modified acrylic silicone resin are suitable.

[0049] An example of an acrylic silicone resin emulsion is "U-DOUBLE EF-023" manufactured by Nippon Shokubai Co., Ltd.

[0050] [Colored gel particles] The colored gel particles are dispersed in the clear coating. The colored gel particles are colored gel-like particles. The colored gel particles contain a synthetic resin, a color pigment, and a hydrogel. In addition to these, the colored gel particles may also contain a lightweight aggregate.

[0051] The colored gel particles can be obtained, for example, by adding a colored gel particle raw material composition containing a synthetic resin, a color pigment, a lightweight aggregate, and a hydrogel main raw material to a medium containing a hydrogel insolubilizer while stirring, thereby causing the hydrogel main raw material and the hydrogel insolubilizer to react with each other to produce a hydrogel. The synthetic resin can be used in the form of a synthetic resin emulsion or a synthetic resin dispersion. The synthetic resin, color pigment, lightweight aggregate, and hydrogel (main hydrogel raw material and hydrogel insolubilizer) will be described below by way of example.

[0052] a) Synthetic resin As mentioned above, the synthetic resin constituting the colored gel particles can be used in the form of a synthetic resin emulsion or a synthetic resin dispersion.

[0053] The resin component of the synthetic resin emulsion or synthetic resin dispersion is not particularly limited. For example, known synthetic resins such as acrylic resin, ethylene-acrylic resin, vinyl acetate-acrylic resin, styrene-acrylic resin, urethane resin, silicone resin, urethane-acrylic resin, and silicone-acrylic resin can be used. Among them, from the viewpoint of weather resistance, it is preferable to use acrylic resin, particularly acrylic silicone resin. For example, acrylic silicone resin and ceramic-modified acrylic silicone resin are suitable.

[0054] An example of the acrylic silicone resin emulsion is the aforementioned "U-DOUBLE EF-023" manufactured by Nippon Shokubai Co., Ltd.

[0055] b) Color pigments Examples of color pigments that can be used to form the colored gel particles include titanium oxide, yellow iron oxide, red iron oxide (ferric oxide: red iron oxide), phthalocyanine blue, ochre, ultramarine, carbon black, etc. However, the color pigments are not limited to these.

[0056] The content of the color pigment is preferably 0.1 to 100% by weight, more preferably 1 to 50% by weight, and most preferably 5 to 30% by weight, based on 100% by weight of the solid content of the synthetic resin emulsion or synthetic resin dispersion.

[0057] c) Lightweight aggregate The colored gel particles may contain lightweight aggregate, which is preferably made of resin.

[0058] Examples of resins that can be used to form lightweight aggregate include ethylene vinyl acetate, polyacrylonitrile, polyurethane, polystyrene, polypropylene, phenol, polyvinyl chloride, urea, polyimide, synthetic rubber, etc. Ethylene vinyl acetate is particularly preferred because it is flexible, elastic, and has excellent weather resistance.

[0059] The lightweight aggregate is preferably a foamed resin (a foamed resin powder). In this case, the type of gas filling the pores is not important. For example, ethylene vinyl acetate foam, styrene foam, etc. can be used as the lightweight aggregate. The lightweight aggregate may also be a foamed resin and may be a hollow balloon. Specifically, a hollow balloon may be formed by heating a thermally expandable microsphere (thermally expandable microcapsule) in which a low-boiling hydrocarbon (core) is encapsulated in a thermoplastic polymer cell, thereby expanding the encapsulated low-boiling hydrocarbon and softening the thermoplastic shell. Furthermore, the lightweight aggregate is preferably a foamed powder made of a synthetic resin and has closed cells.

[0060] The flexibility of lightweight aggregates varies depending on their material and expansion ratio, and affects the flexibility of the dried colored gel particles and the coating film of the matte multicolored paint composition containing them. Lightweight resin aggregates have a bulk density of 0.01 to 0.5 g / cm. 3 The bulk density of the lightweight resin aggregate is 0.5 g / cm 3By setting the bulk density of the resin lightweight aggregate to 0.03 to 0.4 g / cm or less, a more matte effect is imparted to the coating film of the matte multicolor coating composition, and the flexibility of the coating film is favorably affected. 3 , more preferably 0.02 to 0.35 g / cm 3 is.

[0061] The average particle size of the lightweight aggregate can be approximately 0.03 to 4 mm. If the average particle size of the lightweight aggregate is 0.03 mm or more, the resulting coating will have a low gloss and excellent three-dimensional effect. Furthermore, if the average particle size of the lightweight aggregate is 5 mm or less, the aggregate will be less likely to fall off during application. However, lightweight aggregate with a low bulk density can be difficult to handle if the particle size is too small, as it tends to be blown around in the wind. Furthermore, depending on the amount added, if the particle size is too large, the contact area with the coating surface will be reduced, potentially leading to more likely to fall off during application. Therefore, the average particle size of the lightweight aggregate is preferably in the range of 0.1 to 3 mm, and more preferably in the range of 0.2 to 1 mm.

[0062] The amount of lightweight aggregate to be blended is preferably 0.1 to 10% by weight, more preferably 1 to 6% by weight, and most preferably 2 to 5% by weight, based on 100% by weight of the solids content of the matte multicolor paint composition. The amount of the lightweight aggregate mixed is preferably 0.5 to 5% by weight, and more preferably 1 to 4% by weight, based on 100% by weight of the colored gel particles.

[0063] d) Hydrogel The hydrogel that constitutes the colored gel particles has a structure in which water is held in a hydrogel-forming substance to form a gel. The hydrogel-forming substance is a compound that forms a network structure to hold water in the gel and exhibits gelation properties, and is formed by reaction or bonding between the hydrogel main raw material, which is the main part of the network structure, and a hydrogel insolubilizer (gelling agent), which is the joint part of the network structure.

[0064] The main raw material for the hydrogel is not particularly limited as long as it can form a hydrogel, and may be an organic compound or an inorganic compound, or a mixture of both.

[0065] The organic compound is preferably a hydroxyl group-containing organic polymer. For example, polyvinyl alcohol, guar gum, carrageenan, xanthan gum, methyl cellulose, hydroxymethyl cellulose, and derivatives thereof can be used. Among them, polyvinyl alcohol, guar gum, and guar gum derivatives (modified by hydroxypropylation, etc.) are preferred because they allow resins and the like to be well dispersed and produce a hydrogel with excellent stability. Sodium alginate, a type of polysaccharide and dietary fiber, can also be used.

[0066] The inorganic compound is preferably a water-swellable silicate compound. Examples include water-swellable clay minerals such as hectorite, montmorillonite, bentonite, and attapulgite. The water-swellable silicate compound may be a natural mineral or a synthetic compound. Among these, synthetic hectorite is preferred because it can produce a hydrogel with excellent stability.

[0067] Phosphates, borates, silicates, etc. can be used as hydrogel insolubilizers (gelling agents) that react or bond with the main hydrogel raw material to form the joints of the network structure. Phosphates and borates are preferred because they can form good hydrogels that are difficult to dissolve in water. Phosphates are particularly preferred when the main hydrogel raw material is a water-swellable silicate compound such as hectorite, while borates are particularly preferred when the main hydrogel raw material is a hydroxyl group-containing organic polymer such as polyvinyl alcohol or guar gum, as these can form a stable hydrogel in water. Examples of phosphates that can be used include sodium phosphates such as sodium pyrophosphate, and potassium phosphates such as potassium pyrophosphate. Examples of borates that can be used include ammonium borates such as ammonium pentaborate, and borax.

[0068] When the hydrogel main ingredient and the hydrogel insolubilizer (gelator) react or bond to form a network structure made of a hydrogel-forming substance, the two may simply bond additively, such as by addition, or they may bond by condensation, such as by dehydration, in which some of their atoms are detached and then bonded.

[0069] Although the hydrogel has been exemplified as a network structure formed by a hydrogel main ingredient and a hydrogel insolubilizer (gelling agent), the hydrogel may be formed by a mechanism other than the formation of a network structure. Furthermore, the colored gel particles may contain an extender pigment such as calcium carbonate.

[0070] e) Method for producing colored gel particles Next, a method for producing colored gel particles will be described by way of example.

[0071] The colored gel particles can be obtained, for example, by adding a colored gel particle raw material composition containing a synthetic resin, a colored pigment, a lightweight aggregate, and a hydrogel main raw material to an aqueous medium containing a hydrogel insolubilizer (gelling agent), and causing the hydrogel main raw material and the hydrogel insolubilizer to react with each other to produce a hydrogel-forming substance (hydrogel).

[0072] First, a synthetic resin (synthetic resin emulsion or synthetic resin dispersion), a color pigment, a hydrogel main raw material, and, if desired, optional components such as a water solvent, a lightweight aggregate, an extender pigment, a preservative, a thickener, and various additives are added and stirred until uniformly dispersed, to prepare a colored gel particle raw material composition.

[0073] The content of the synthetic resin emulsion in the colored gel particle raw material composition is preferably 1 to 30% by weight, more preferably 2 to 20% by weight, even more preferably 3 to 15% by weight, and most preferably 4 to 10% by weight, based on the synthetic resin solid content.

[0074] The content of the color pigment in the color gel particle raw material composition is preferably 1 to 30% by weight, more preferably 3 to 20% by weight, even more preferably 4 to 15% by weight, and most preferably 5 to 10% by weight.

[0075] The content of the hydrogel main raw material in the colored gel particle raw material composition is preferably 10 to 100 parts by weight in terms of solid content, more preferably 20 to 80 parts by weight in terms of solid content, even more preferably 25 to 50 parts by weight, and most preferably 30 to 40 parts by weight in terms of solid content, relative to 100 parts by weight of the solid content of the synthetic resin emulsion.

[0076] Next, the obtained colored gel particle raw material composition is added to an aqueous solution containing a hydrogel insolubilizer (gelling agent). At this time, it is preferable to gradually add the colored gel particle raw material composition while stirring the aqueous solution containing the hydrogel insolubilizer (gelling agent), and then continue stirring for a while.

[0077] The concentration of the hydrogel insolubilizer (gelling agent) in the aqueous solution is preferably 0.01 to 1.0 wt %, more preferably 0.1 to 0.8 wt %, even more preferably 0.2 to 0.7 wt %, and most preferably 0.4 to 0.6 wt %.

[0078] After stirring, the mixture is left to stand at room temperature for at least 1 hour, preferably at least 5 hours, to form a stable gel. The upper limit of the standing time is usually about 24 hours, at which point the formed gel reaches an equilibrium state. By the above-mentioned production method, a gel-forming substance having a network structure or the like is formed, and the water in which the resin or the like is dispersed is held in the network structure or the like, thereby obtaining colored gel particles.

[0079] [Resin beads] Resin beads are dispersed in the clear coating. The resin beads have an average particle diameter of 3 to 120 μm, have two or more peaks in the particle size distribution, and are contained in an amount of 5 to 40 wt % relative to 100 wt % of the solid content of the matte multicolor coating composition.

[0080] The resin beads may be a mixture of two or more resin beads (element beads) with different average particle diameters. For example, a mixture of first element beads with an average particle diameter of 3 to 120 μm and second element beads with an average particle diameter of 3 to 120 μm, which is different from the first element beads, may be used. In this case, the resin beads obtained by mixing both element beads have two peaks in the particle size distribution.

[0081] Examples of resin types that can be used for the resin beads and element beads include polyethylene, polystyrene, acrylic, urethane, acrylic urethane, nylon, polypropylene, polyethylene naphthalate, polymethyl methacrylate, polybutyl methacrylate, polymethacrylic acid ester, polymethyl methacrylate-styrene copolymer, etc. Among these, it is preferable to use acrylic beads or acrylic urethane beads.

[0082] [Other ingredients] In addition to the above materials, the matte multicolor paint composition may contain various additives such as thickeners and antifoaming agents, and film-forming aids such as Texanol.

[0083] 2. Method for producing a matte multicolored pattern paint composition The above clear coating, the above colored gel particles, the above resin beads, and, if necessary, other materials and water are mixed together, and homogenized by stirring or the like, to obtain a matte multicolored pattern coating composition.

[0084] 3. Matte multicolored coating A matte multicolored coating film can be obtained by applying the above-mentioned matte multicolored coating composition to various articles or buildings and drying it. The obtained matte multicolored coating film is composed of the synthetic resin contained in the clear coating, the dried colored gel particles dispersed in this synthetic resin, and the resin beads dispersed in the synthetic resin.

[0085] Here, the colored gel particles contain a synthetic resin, a color pigment, and a hydrogel, and the hydrogel is a form in which water is held in a hydrogel-forming substance. Therefore, the dried colored gel particles contain a synthetic resin, a color pigment, and a hydrogel-forming substance. Note that, depending on the degree of drying, the hydrogel-forming substance may contain a small amount of water.

[0086] 4. Goods and buildings The surface to which the matte multicolor pattern coating composition is applied is not particularly limited. For example, it can be applied to wall panels or the exterior or interior walls of buildings. The material of the surface to be coated is also not particularly limited. For example, porcelain, tile, concrete, ALC panel, PC panel, mortar, siding board, extruded board, gypsum board, steel plate, and plastic board can be used. Furthermore, it can be used not only on the surfaces of newly constructed buildings, but also when repainting the surfaces of existing buildings.

[0087] The method for applying the matte multicolor paint composition to the surface of the substrate is not particularly limited, and it can be applied by, for example, spray coating or roller coating.

[0088] Such articles and buildings are provided with a matte multicolored coating film that has low gloss but is resistant to deterioration in weather resistance and reduction in coating film elongation.

[0089] According to the present invention, it is possible to provide a matte multicolor pattern coating composition that can give a coating film (matte multicolor pattern coating film) that has low gloss but is resistant to performance degradation. [Example]

[0090] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In the examples, the ratios and the like are based on "weight".

[0091] 1. Preparation of colored gel particles First, six types of colored gel particles to be blended into the matte multicolor paint composition were prepared (Blending Examples 1 to 6) based on the formulation shown in Table 1 below. The values ​​in parentheses in each formulation are converted to solids. For example, the blending amount of synthetic resin emulsion A in Blending Example 1 was 108, of which the blending amount of solids was 54 (blending amount 108 × non-volatile content 50%).

[0092] (Combination example 1) Blend Example 1 is a blend example of colored gel particles containing no lightweight aggregate. First, synthetic resin emulsion A (Nippon Shokubai Co., Ltd. "U-Double EF-023"), color pigments (carbon black, yellow iron oxide, red iron oxide), extender pigment (Carfine Co., Ltd. "Heavy Calcium Carbonate KS-1000"), film-forming agent (Texanol), and water (tap water) were blended. Then, a PVA resin solution (Elvanol 71-30 manufactured by Kuraray Co., Ltd.), which is the main raw material for the hydrogel, and an aqueous polysaccharide solution (Echo Gum SF manufactured by MP Gokyo Food & Chemical Co., Ltd.) were blended and stirred to obtain a colored gel particle raw material composition. The resulting colored gel particle raw material composition was added to an aqueous solution containing a hydrogel insolubilizer (0.4% ammonium borate) while stirring, and the particles were insolubilized by continuing stirring until the average particle size reached about 1.5 mm, yielding dark brown colored gel particles. No particular problems occurred during the production process of the colored gel particles (the same applies to Formulation Examples 2 to 6 described below). As shown in Table 1, the proportion of solids (non-volatile content) in 100% by weight of the obtained colored gel particles was 15.4%. Here, the weight of the colored gel particles was defined as the sum of the weight of the colored gel particle raw material composition and the weight of the hydrogel insolubilizer, and the proportion of solids (non-volatile content) in 100% by weight of the colored gel particles was calculated as the proportion of solids (non-volatile content) to this weight. Furthermore, since Blend Example 1 does not contain any lightweight aggregate, the proportion of lightweight aggregate in 100% by weight of colored gel particles is 0%.

[0093] [Table 1]

[0094] (Combination example 2) Formulation Example 2 is also a formulation example of colored gel particles that do not contain lightweight aggregate. It differs from Formulation Example 1 in that (1) titanium oxide, a white pigment, is added to the color pigment, and (2) a silicate compound (BYK Laponite RD) is used instead of the polysaccharide aqueous solution, which is one of the main ingredients of the hydrogel. This formulation example produced brown colored gel particles.

[0095] (Combination example 3) Blending Example 3 is a blending example of colored gel particles containing lightweight resin aggregate. The lightweight resin aggregate has a bulk density of 0.3 g / cm. 3 A urethane foam (Nissei Sangyo Co., Ltd. "ESTOP #60") was used. The color pigment shown in the recipe was used, and in this recipe, gray colored gel particles were obtained.

[0096] (Combination example 4) Blending Example 4 is also a blending example of colored gel particles containing lightweight resin aggregate. The lightweight resin aggregate has a bulk density of 0.05 g / cm. 3 A styrene foam (Daiwa Chemical Industry Co., Ltd. "Styrofoam Beads DJ-10") was used. The color pigment shown in the recipe was used, and in this recipe, dark gray colored gel particles were obtained.

[0097] (Combination example 5) Blend Example 5 is a blend example of colored gel particles containing inorganic (non-resin) lightweight aggregate. The inorganic lightweight aggregate has a bulk density of 0.34 g / cm. 3 Perlite ("Hard Light B-04" manufactured by Showa Chemical Industry Co., Ltd.) was used. The color pigment shown in the recipe was used, and in this recipe, light brown colored gel particles were obtained.

[0098] (Combination example 6) Blending Example 6 is a blending example of colored gel particles containing inorganic aggregate. The inorganic aggregate has a bulk density of 2.7 g / cm 3Silica sand (Mikawa Silica Co., Ltd. "Standard Product No. 5") was used. Synthetic resin dispersion A (DIC Corporation Watersol S-744) was used as the synthetic resin. The color pigment shown in the recipe was used, and in this example, reddish-brown colored gel particles were obtained.

[0099] 2. Preparation of matte multicolored paint composition Matte multicolored paint compositions were prepared using the colored gel particles obtained in the above Formulation Examples 1 to 6. Examples of the matte multicolored paint compositions will be explained below with reference to Table 2. The matte multicolored paint composition comprises a clear paint, colored gel particles, and resin beads.

[0100] Example 1 In this example, the clear paint used was synthetic resin emulsion A (U-Double EF-023, manufactured by Nippon Shokubai Co., Ltd.) containing a special acrylic resin with a glass transition temperature of 15°C, the colored gel particles used were a mixture of formulation example 1, which does not contain lightweight aggregate, and formulation example 3, which contains lightweight resin aggregate, and the resin beads used were a mixture of acrylic beads A (Techpolymer MBX-15, manufactured by Sekisui Plastics Co., Ltd.) with an average particle size of 15 μm and acrylic beads B (Techpolymer BM30X-5, manufactured by Sekisui Plastics Co., Ltd.) with an average particle size of 5 μm. Acrylic beads A and acrylic beads B are element beads. In addition, a coating composition was prepared in the usual manner by blending film-forming aids and additives as shown in Table 2. In Table 2, the matte multicolor coating composition is simply referred to as "coating composition."

[0101] The resulting matte multicolored paint composition was formed into a film, and the surface gloss, weather resistance and coating elongation were evaluated.

[0102] The surface gloss was checked at measurement angles of 60° and 85° using Micro Trigloss (manufactured by BYK-Chemie). A surface gloss of 3.5 or less at a measurement angle of 60° and a surface gloss of 1 or less at a measurement angle of 85° was rated as ○, and any other value was rated as ×.

[0103] Weather resistance was measured using a Metal Weather (manufactured by Daipla Wintes Co., Ltd.) at an illuminance of 80 mW / cm² for 1,000 hours, and the gloss was calculated from the initial and post-test gloss (gloss retention = post-test gloss / initial gloss). A Micro Trigloss (manufactured by BYK-Chemie) was used to measure gloss. A gloss retention of 60% or more was rated as good, and anything less (less than 60%) was rated bad.

[0104] Coating elongation was calculated from the gauge length at the time the test specimen broke and the initial gauge length (coating elongation = (gauge length at break - initial gauge length) / initial gauge length). For example, if the initial gauge length was 30 mm and the gauge length at break was 36 mm, the coating elongation was 20%. Coating elongation of less than 20% (<20%) was evaluated as ○, and coating elongation of less than or equal to 20% (<20%) was evaluated as ×.

[0105] For the overall evaluation, a rating of ○ was given to a sample that was evaluated as having all of the following characteristics: surface gloss, weather resistance, and coating elongation. If any of the following characteristics was evaluated as ×, the sample was evaluated as ×.

[0106] As shown in Table 2, the matte multicolored paint composition of Example 1 was rated as good in all respects of surface gloss, weather resistance, and coating film elongation (rated as good).

[0107] [Table 2]

[0108] Example 2 This is an example in which the amount of resin beads was increased based on the formulation of Example 1. Specifically, this is an example in which the amounts of acrylic beads A and acrylic beads B in Example 1 were each increased (2.5 → 6).

[0109] The obtained matte multicolor pattern coating composition had a reduced surface gloss (improved matte finish) and improved weather resistance compared to Example 1, but the coating film elongation tended to decrease. The overall evaluation was ○.

[0110] Example 3 This is an example in which acrylic urethane beads with a large particle size were added to the resin beads based on the formulation of Example 1. Specifically, the amounts of acrylic beads A (15 μm) and acrylic beads B (5 μm) in Example 1 were each reduced (2.5 → 2), and an equal amount of acrylic urethane beads with an average particle size of 75 μm was added (1).

[0111] The obtained matte multicolored pattern coating composition had a reduced surface gloss (improved matte finish) compared to Example 1. The overall evaluation was ◯.

[0112] Example 4 Based on the formulation of Example 1, this example uses a synthetic resin in the clear paint with a glass transition temperature 10°C higher (15°C → 25°C). In addition, the colored gel particles and resin beads were also changed.

[0113] The resulting matte multicolor paint composition tended to have a lower coating film elongation than Example 1. This is thought to be due to the relatively high glass transition temperature of the synthetic resin contained in the clear paint. The overall evaluation was ○.

[0114] Example 5 This is an example based on the formulation of Example 1, but using colored gel particles containing inorganic lightweight aggregate instead of resin.

[0115] The obtained matte multicolored pattern coating composition had an increased surface gloss (a decreased / worsened degree of matte finish) compared to Example 1. The overall evaluation was rated as ○.

[0116] Example 6 This is an example in which the amount of colored gel particles containing inorganic lightweight aggregate is increased based on the formulation of Example 5.

[0117] The obtained matte multicolor pattern coating composition had a reduced surface gloss (improved matte finish) and improved weather resistance compared to Example 5, but the coating film elongation tended to decrease. The overall evaluation was rated ○.

[0118] Example 7 This is an example based on the formulation of Example 1, but using only colored gel particles without any lightweight aggregate.

[0119] The obtained matte multicolored pattern coating composition had an increased surface gloss (a decreased / worsened degree of matte finish) compared to Example 1. The overall evaluation was ◯.

[0120] (Comparative Example 1) This is an example in which the amount of resin beads in the paint was significantly increased based on the formulation of Example 1. Specifically, this is an example in which the amount of acrylic beads A and acrylic beads B in Example 1 was each increased (2.5 → 9).

[0121] The obtained matte multicolor paint composition had a significantly reduced surface gloss (improved matte finish) and improved weather resistance compared to Example 1, but the coating film elongation was significantly reduced. The overall evaluation was poor.

[0122] (Comparative Example 2) Based on the formulation of Example 1, this is an example in which the resin beads in the paint are only acrylic beads B, and the resin beads do not have two or more peaks in the particle size distribution (only one peak).

[0123] The obtained matte multicolored pattern coating composition had increased surface gloss (decreased / worsened matte finish) and decreased weather resistance compared to Example 1. The overall evaluation was poor.

[0124] (Comparative Example 3) Based on the formulation of Example 1, this example uses only acrylic urethane beads with a large particle size (75 μm) as the resin beads in the paint, and does not have two or more peaks in the particle size distribution (only one peak).

[0125] The obtained matte multicolored pattern coating composition had increased surface gloss (decreased / worsened matte finish) and decreased weather resistance compared to Example 1. The overall evaluation was poor. Compared to Comparative Example 2, the surface gloss is increased (the degree of mattness is reduced / worsened), and it can be seen that when resin beads with a large particle size are blended alone, the degree of mattness is reduced (worsened).

[0126] Comparative Example 4 Based on the formulation of Example 2, this example uses only acrylic beads B, with the total amount of resin beads in the paint remaining the same, and uses resin beads that do not have two or more peaks in the particle size distribution (only one peak).

[0127] The obtained matte multicolor pattern coating composition had an increased surface gloss (a decreased / worsened degree of matte) and a decreased coating film elongation compared to Example 2. The overall evaluation was poor.

[0128] (Comparative Example 5) Based on the formulation of Example 1, this is an example in which a synthetic resin with a high glass transition temperature is used for the clear coating (15°C in Example 1 → 50°C in Comparative Example 5).

[0129] The resulting matte multicolored pattern coating composition had a significantly reduced coating film elongation compared to Example 1. The overall evaluation was poor.

[0130] (Comparative Example 6) Based on the formulation of Example 1, this is an example in which a synthetic resin with a low glass transition temperature is used for the clear coating (15°C in Example 1 → -10°C in Comparative Example 6).

[0131] The obtained matte multicolor pattern coating composition had improved coating film elongation compared to Example 1, but the surface gloss increased (the degree of matteness decreased / worsened) and the weather resistance also decreased significantly. The overall evaluation was poor.

[0132] The present invention has been described above with reference to specific embodiments and examples, but the present invention is not limited to the above embodiments, and various changes and modifications can be made by those skilled in the art without departing from the scope of the claims attached to the application of this application.

Claims

1. A clear paint containing a synthetic resin, Colored gel particles dispersed in this clear paint, A matte multicolor paint composition comprising resin beads dispersed in the clear paint, The synthetic resin has a glass transition temperature of −5 to 40° C. The resin beads have an average particle size of 3 to 120 μm, have two or more peaks in particle size distribution, and are contained in an amount of 5 to 40% by weight based on 100% by weight of the solid content of the matte multicolor paint composition. Matte multicolor paint composition.

2. The resin beads It is a mixture of multiple element beads with different average particle sizes, Each of the plurality of element beads has an average particle size of 3 to 120 μm. The matte multicolor paint composition of claim 1.

3. The colored gel particles are Bulk density 0.01 to 0.5 g / cm ３ Contains lightweight aggregate of The matte multicolor paint composition of claim 1.

4. The lightweight aggregate is The content is 0.1 to 10% by weight based on 100% by weight of the solid content of the matte multicolor paint composition. The matte multicolor paint composition according to claim 3.

5. The lightweight aggregate is It is made of resin, The matte multicolor paint composition according to claim 3.

6. A clear paint containing a synthetic resin, Colored gel particles dispersed in this clear paint, A matte multicolor paint composition comprising resin beads dispersed in the clear paint, The synthetic resin has a glass transition temperature of −5 to 40° C. The resin beads have an average particle size of 3 to 120 μm, have two or more peaks in particle size distribution, and are contained in an amount of 5 to 40% by weight based on 100% by weight of the solid content of the matte multicolor paint composition, The colored gel particles are Bulk density 0.01 to 0.5 g / cm ３ It contains lightweight aggregates, The lightweight aggregate is It is made of resin and is contained in an amount of 0.1 to 10% by weight based on 100% by weight of the solid content of the matte multicolor paint composition. Matte multicolor paint composition.

7. The colored gel particles are a synthetic resin emulsion or a synthetic resin dispersion; A color pigment; a hydrogel main raw material and a colored gel raw material composition containing the same, The hydrogel is obtained by adding the hydrogel to an aqueous solution containing an insolubilizer. The matte multicolor paint composition of claim 1.

8. Synthetic resin and A dried product of colored gel particles dispersed in the synthetic resin; Resin beads dispersed in the synthetic resin, The synthetic resin has a glass transition temperature of −5 to 40° C. The resin beads have an average particle size of 3 to 120 μm, have two or more peaks in particle size distribution, and are contained in an amount of 5 to 40% by weight based on 100% by weight of the matte multicolor pattern coating film. Matte multicolored coating.

9. The resin beads It is a mixture of multiple element beads with different average particle sizes, Each of the plurality of element beads has an average particle size of 3 to 120 μm. The matte multicolor pattern coating film according to claim 8.

10. The dried colored gel particles are Bulk density 0.01 to 0.5 g / cm ３ Contains lightweight aggregate of The matte multicolor pattern coating film according to claim 8.

11. The lightweight aggregate is The content is 0.1 to 10% by weight based on 100% by weight of the matte multicolor coating film. The matte multicolor pattern coating film according to claim 10.

12. The lightweight aggregate is It is made of resin, The matte multicolor pattern coating film according to claim 10.

13. Synthetic resin and A dried product of colored gel particles dispersed in this synthetic resin; Resin beads dispersed in the synthetic resin, The synthetic resin has a glass transition temperature of −5 to 40° C. The resin beads have an average particle size of 3 to 120 μm, have two or more peaks in particle size distribution, and are contained in an amount of 5 to 40% by weight in 100% by weight of the matte multicolor coating film; The dried colored gel particles are Bulk density 0.01 to 0.5 g / cm ３ It contains lightweight aggregates, The lightweight aggregate is It is made of resin and is contained in 0.1 to 10% by weight of the matte multicolored coating film (100% by weight). Matte multicolored coating.

14. The colored gel particles are a synthetic resin emulsion or a synthetic resin dispersion; A color pigment; a hydrogel main raw material and a colored gel raw material composition containing the same, The hydrogel is obtained by adding the hydrogel to an aqueous solution containing an insolubilizer. The matte multicolor pattern coating film according to claim 8.

15. The matte multicolored coating film according to any one of claims 8 to 14 is formed. Goods.

16. The matte multicolored coating film according to any one of claims 8 to 14 is formed. architecture.

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