JP4656896B2 - Method for forming heat insulating coating - Google Patents

Description

  The present invention relates to a method for forming a heat insulating coating film applicable to an exterior surface of a building.

Conventionally, natural stone-like coating materials capable of expressing a variety of feelings such as marble patterns and granite patterns have been used as exterior coating materials for buildings. Generally, a natural stone-like coating material is composed of an inorganic aggregate such as ceramic crushed particles, calcined silica sand, feldspar, and cold water stone, and a binder (for example, Japanese Patent Publication No. 2-40702 (Patent Document 1)).
However, the inorganic aggregate contained in such a natural stone-like coating material has the property of easily transferring heat. In recent years, attention has been paid to the movement to increase the heat insulation of buildings to prevent the temperature inside the buildings from rising, to reduce the amount of cooling used and to suppress the heat island phenomenon. It is difficult to obtain an effect of improving heat insulation with a stone coating material.

  Japanese Patent Laid-Open No. 8-127736 (Patent Document 2) describes a natural stone-like coating material comprising an inorganic aggregate, hollow particles and a binder, and proposes to improve heat insulation by blending the hollow particles. Has been. However, in order to obtain sufficient heat insulation performance in such a coating material, a large amount of hollow particles must be blended, and the natural stone tone by inorganic aggregates such as ceramic granule, calcined silica sand, feldspar, cryogenic stone, etc. A sense of versatility is lost.

JP 2002-186896 A (Patent Document 3) discloses a technique for improving heat insulation while maintaining natural stone-like design properties. Japanese Patent Application Laid-Open No. 2002-186896 discloses a natural stone in a heat insulating coating layer containing a fine foam or a fine hollow body. It is described that a coating material layer is laminated.
In the laminated structure of Patent Document 3, if the film thickness of the heat insulating coating layer is increased, the heat insulating performance can be increased accordingly. However, if the heat insulation performance of the lower heat insulating coating layer is improved, the heat generated in the upper natural stone-like coating material layer becomes difficult to conduct and diffuse in the lower layer direction, leading to an increase in the temperature of the upper layer. That is, the improvement of the heat insulation performance of the lower layer increases the thermal load on the upper layer. Such an increase in the thermal load on the natural stone-like coating material layer as an upper layer causes a decrease in adhesion, and causes a swelling or peeling of the coating film.
In order to enhance the heat insulation performance in Patent Document 3, it is also effective to increase the content ratio of the hollow body in the heat insulating coating layer, but if the content ratio of the hollow body is simply increased, the binder ratio of the heat insulating coating layer Decreases, the strength of the heat insulating coating layer itself becomes insufficient, and it becomes difficult to ensure the adhesion between the heat insulating coating layer and the natural stone coating material layer.
Moreover, in addition to such a thermal load, the natural stone-like coating material has a large specific gravity and the layer thickness is a few millimeters thick, and this load induces a decrease in adhesion. There is a fear.

Japanese Patent Publication No. 2-40702 JP-A-8-127736 JP 2002-186896 A

  The present invention has been made in view of the above points, and the object of the present invention is to exhibit a natural stone-like versatility with respect to the surface of a building exterior surface and to prevent a decrease in adhesion in the formed coating film. It is an object of the present invention to provide a method for forming a heat-insulating coating film that can perform stable heat-insulating performance over a long period.

  In order to achieve the above object, the present inventor has intensively studied and applied a heat insulating paint using a specific cross-linking reaction type synthetic resin emulsion, and then applied a colorful pattern paint containing colored resin particles as an overcoat material. The present invention was completed by conceiving a method for forming a coating film.

That is, the present invention has the following characteristics.
1. For the exterior surface of the building,
(A-1) the glass transition temperature (hereinafter referred to as "Tg") and is -40～20 ° C., crosslinking agent having a crosslinking reactive synthetic resin emulsion, functional group reactive with an epoxy group having an epoxy group, (b ) Hollow particles, and (c) Infrared reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) with respect to 100 parts by weight of the solid content of component (a), component 1 After applying a heat insulating paint which is ~ 400 parts by weight,
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm . Method for forming a coating film.
2. For the exterior surface of the building,
(A-2) Tg is −40 to 20 ° C. and has a functional group capable of reacting with an epoxy group and has a functional group capable of reacting with an epoxy group, a crosslinking agent having an epoxy group, (b) hollow particles, and (c) infrared rays Insulating paint containing reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) and 1 to 400 parts by weight of component (c) with respect to 100 parts by weight of solid content of component (a) After applying
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm. Method for forming a coating film.
3. For the exterior surface of the building,
(A-3) including at least two layers of a core part and a shell part, wherein the Tg of the shell part is -20 to 20 ° C, the Tg of the core part is -40 to 0 ° C, and the Tg of the shell part is the core A cross-linked multilayer emulsion having a functional group capable of reacting with the epoxy group in the shell, (b) hollow particles, and (c) infrared rays. Insulating paint containing reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) and 1 to 400 parts by weight of component (c) with respect to 100 parts by weight of solid content of component (a) After applying
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm. Method for forming a coating film.
4). The multi-colored paint includes a synthetic resin having a silica remaining ratio in a solid content of 0.1 to 30 % by weight. ~ 3. The formation method of the heat insulating coating film in any one of.

  According to the present invention, a natural stone-like versatility can be expressed on the surface of a building exterior surface, and adhesion deterioration in a formed coating film can be prevented, and stable heat insulation performance is exhibited over a long period of time. Heat-insulating coating film is obtained.

  Hereinafter, the present invention will be described in detail together with embodiments thereof.

Insulating paint in the present invention,
(A) a cross-linked reactive synthetic resin emulsion (hereinafter referred to as “component (a)”) having a Tg of −50 to 50 ° C. and having a reactive functional group;
(B) Hollow particles (hereinafter referred to as “component (b)”) and (c) Infrared reflective powder (hereinafter referred to as “component (c)”)
Is contained as an essential component.

The component (a) in the heat insulating paint is a cross-linked reactive synthetic resin emulsion having a reactive functional group. This component (a) has at least one reactive functional group, and forms a crosslinked structure by reaction with the reactive functional group and a functional group capable of reacting at the time of coating film formation or after coating film formation. Is. The functional group capable of reacting with the reactive functional group may be contained in the component (a) or may be contained in a cross-linking agent mixed separately.
Such reactive functional group combinations include, for example, carboxyl groups and metal ions, carboxyl groups and carbodiimide groups, carboxyl groups and epoxy groups, carboxyl groups and aziridine groups, carboxyl groups and oxazoline groups, hydroxyl groups and isocyanate groups, and carbonyls. And a hydrazino group, an epoxy group and a hydrazino group, an epoxy group and an amino group, and an alkoxyl group. These can be used alone or in combination of two or more.

(A) Tg of a component is -50-50 degreeC, Preferably it sets to -40-20 degreeC. When Tg is lower than −50 ° C., the strength of the heat insulation layer becomes insufficient, and swelling, peeling and the like are likely to occur. When Tg is higher than 50 ° C., sufficient adhesion performance cannot be obtained, and swelling, peeling and the like are likely to occur. Further, the followability to the base is lowered, and cracks are likely to occur. Note that Tg in the present invention is a value obtained by the Fox calculation formula.
(A) The average particle diameter of a component is about 0.05-0.2 micrometer normally.

As the monomer constituting the component (a), various monomers can be used. Usable monomers include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, n-amyl (meth) acrylate, isoamyl (Meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate, cyclohexyl (meth) acrylate (Meth) acrylic acid ester monomers such as phenyl (meth) acrylate and benzyl (meth) acrylate;
Epoxy group-containing monomers such as glycidyl (meth) acrylate, diglycidyl (meth) acrylate, and allyl glycidyl ether;
Carboxyl group-containing monomers such as acrylic acid, methacrylic acid, crotonic acid, maleic acid or its monoalkyl ester, itaconic acid or its monoalkyl ester, fumaric acid or its monoalkyl ester;
Contains amino groups such as N-methylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, dimethylaminoethyl vinyl ether, N- (2-dimethylaminoethyl) acrylamide, N- (2-dimethylaminoethyl) methacrylamide monomer;
Pyridine monomers such as vinylpyridine;
Hydroxyl group-containing monomers such as 2-hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate;
Vinyl ester monomers such as vinyl acetate and vinyl propionate;
Nitrile group-containing monomers such as acrylonitrile and methacrylonitrile;
Aromatic monomers such as styrene, 2-methylstyrene, vinyltoluene, t-butylstyrene, chlorostyrene, vinylanisole, vinylnaphthalene, divinylbenzene;
Amide group-containing monomers such as acrylamide, methacrylamide, maleic acid amide, N-methylol (meth) acrylamide and diacetone acrylamide;
Carbonyl group-containing monomers such as acrolein, diacetone (meth) acrylamide, vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone;
Alkoxysilyl groups such as vinyltrimethoxysilane, vinyltriethoxysilane, γ- (meth) acryloyloxypropyltrimethoxysilane, γ- (meth) acryloyloxypropyltriethoxysilane, γ- (meth) acryloyloxypropylmethyldimethoxysilane Containing monomers;
Vinylidene halide monomers such as vinylidene chloride and vinylidene fluoride;
Other examples include ethylene, propylene, isoprene, butadiene, vinyl pyrrolidone, vinyl chloride, vinyl ether, vinyl ketone, vinyl amide, and chloroprene. These can be used alone or in combination of two or more.

  In the present invention, the Tg of the component (a) is set to a specific value, and further, a crosslinked structure is formed by a reactive functional group, whereby the strength of the heat insulating coating film is improved and the water vapor permeability in the heat insulating coating film is increased. And the effect of diffusing or diffusing moisture and high boiling point organic solvent in the coating film is enhanced. Furthermore, the cross-linking reactivity due to the reactive functional group also has the effect of increasing the adhesion with the top coating material. In the present invention, such an effect makes it possible to exhibit swelling prevention and peeling prevention. Moreover, in this invention, coating-film physical properties, such as intensity | strength, water resistance, impact resistance, and alkali resistance, can also be improved by using (a) component.

As the component (a) in the present invention, those obtained by a crosslinking reaction between an epoxy group and a functional group capable of reacting with the epoxy group are suitable. Examples of the functional group capable of reacting with the epoxy group include a carboxyl group, an amino group, and a primary hydroxyl group.
One example of such component (a) is (a-1) a crosslinking reaction type synthetic resin emulsion having an epoxy group (hereinafter referred to as “component (a-1)”). The component (a-1) can be obtained by copolymerizing an epoxy group-containing monomer as an essential component among the above monomers. In the component (a-1), a functional group capable of reacting with an epoxy group may be incorporated into the component (a-1), or a crosslinking agent having a functional group capable of reacting with an epoxy group may be separately mixed.

  In addition to the component (a-1), the component (a) suitable in the present invention includes (a-2) a cross-linked reactive synthetic resin emulsion (hereinafter referred to as “(a- 2) component ”). The component (a-2) can be obtained by copolymerizing as an essential component one or more selected from a carboxyl group-containing monomer, an amino group-containing monomer, a pyridine monomer, and a primary hydroxyl group-containing monomer among the above monomers. . In the component (a-2), a crosslinking agent having an epoxy group may be mixed separately.

  The most suitable component (a) in the present invention includes (a-3) at least two layers of a core part and a shell part, and the Tg of the shell part is -20 to 50 ° C (preferably -20 to 20 ° C). The Tg of the core part is −50 to 20 ° C. (preferably −40 to 0 ° C.), the Tg of the shell part is higher than the Tg of the core part, the core part has an epoxy group, and the shell Examples thereof include a crosslinking reaction type multilayer structure emulsion (hereinafter referred to as “component (a-3)”) having a functional group capable of reacting with the epoxy group in the part.

This component (a-3) is a multilayer structure emulsion containing at least two layers of a core part and a shell part. Here, the core part means the innermost layer part of the multilayer structure emulsion, and the shell part means the outermost layer part of the multilayer structure emulsion. The component (a-3) may have a three-layer structure having an intermediate portion between the core portion and the shell portion, or may have a multilayer structure having a plurality of intermediate portions.
In the present invention, by using the component (a-3), it is possible to improve the strength and water vapor permeability of the heat-insulating coating film, and the adhesion with the top coating material, and to prevent swelling and peeling. Can be further enhanced.

  In order to generate an epoxy group in the core part of the component (a-3), an epoxy group-containing monomer may be used as the monomer constituting the core part. As the epoxy group-containing monomer, glycidyl methacrylate is particularly suitable.

(A-3) In order to generate a functional group capable of reacting with an epoxy group in the shell part of the component, as a monomer constituting the shell part, among the above monomers, a carboxyl group-containing monomer, an amino group-containing monomer, a pyridine monomer What is necessary is just to use 1 or more types chosen from a primary hydroxyl group containing monomer. Of these, carboxyl group-containing monomers are preferred in the present invention. As the carboxyl group-containing monomer, at least one selected from acrylic acid and methacrylic acid is particularly preferable.
Moreover, when using a carboxyl group-containing monomer etc. as a monomer which comprises a shell part, it is desirable to use an amide group containing monomer together. By using such an amide group-containing monomer, the reaction of the epoxy group during storage of the paint is sufficiently suppressed, which is advantageous in terms of swelling prevention and peeling prevention. As the amide group-containing monomer, at least one selected from acrylamide and methacrylamide is particularly preferable.

The amount of the epoxy group-containing monomer used is usually 0.1 to 40% by weight, preferably 0.5 to 20% by weight, based on the total amount of monomers constituting the multilayer emulsion.
The amount of the monomer having a functional group capable of reacting with an epoxy group is usually 0.1 to 40% by weight, preferably 0.5 to 20% by weight, based on the total amount of monomers constituting the multilayer structure emulsion.
When the amide group-containing monomer is used in the shell portion, the amount used is preferably 0.5 to 5% by weight based on the total amount of monomers constituting the multilayer structure emulsion.

  In an emulsion having an epoxy group in the core portion and a functional group capable of reacting with the epoxy group in the shell portion, either the epoxy group or the functional group capable of reacting with the epoxy group is interposed between the core portion and the shell portion. In addition, the storage stability of the paint can be improved by providing an intermediate portion made of an inactive copolymer. As monomers constituting the copolymer inactive to both the epoxy group and the functional group capable of reacting with the epoxy group, among the above monomers, (meth) acrylate monomers, secondary hydroxyl group-containing monomers, tertiary Examples thereof include hydroxyl group-containing monomers, vinyl ester monomers, nitrile group-containing monomers, aromatic monomers, amide group-containing monomers, and vinylidene halide monomers. These can be used alone or in combination of two or more.

When the component (a-3) as described above is used, it is possible to further enhance the swelling prevention property and the peeling prevention property by using an epoxy group-containing crosslinking agent in combination. Examples of such epoxy group-containing crosslinking agents include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol polyglycidyl ether, diglycerol polyglycidyl ether, and polyglycerol. Examples include polyglycidyl ether, diglycerol polyglycidyl ether, polyhydroxyalkane polyglycidyl ether, sorbitol polyglycidyl ether, and the like. These can be used alone or in combination of two or more.
The mixing ratio of the epoxy group-containing crosslinking agent is usually about 0.05 to 15 parts by weight, preferably about 0.1 to 5 parts by weight with respect to 100 parts by weight of the resin solid content of the component (a). If it is in such a range, reaction with (a) component can fully be suppressed and storage stability can be ensured.

  Although the manufacturing method of (a) component is not specifically limited, For example, emulsion polymerization, soap-free emulsion polymerization, dispersion polymerization, feed emulsion polymerization, feed dispersion polymerization, seed emulsion polymerization, seed dispersion polymerization, etc. are employable.

The hollow particles (b) in the heat insulating paint of the present invention are components that impart heat insulating properties to the coating film. Examples of the component (b) include hollow ceramic beads and hollow resin beads. Examples of the ceramic component constituting the hollow ceramic beads include sodium silicate glass, aluminum silicate glass, borosilicate soda glass, carbon, alumina, shirasu, obsidian and the like. Examples of the resin component constituting the hollow resin beads include acrylic resin, styrene resin, acrylic-styrene copolymer resin, acrylic-acrylonitrile copolymer resin, acrylic-styrene-acrylonitrile copolymer resin, acrylonitrile-methacrylonitrile copolymer resin, Examples thereof include acrylic-acrylonitrile-methacrylonitrile copolymer resins and vinylidene chloride-acrylonitrile copolymer resins. These can be used alone or in combination of two or more. The component (b) that is a resin component is advantageous in that it has a low thermal conductivity.
Examples of the shape of the component (b) include a spherical shape, an elliptical spherical shape, and a flat spherical shape.

  The component (b) has a hollow structure, and focusing on the structure, the component is classified into an open cell type hollow particle and a closed cell type hollow particle. Of these, closed-cell hollow particles are preferred in the present invention. When closed cell-type hollow particles are used, it is possible to prevent intrusion of a resin component or the like into the cell, so that high heat insulation performance can be exhibited. The internal structure of the closed-cell type hollow particles may be a single hollow type having one hollow per particle, or a multi-hollow type having two or more hollows per particle. .

  The hollow part of the component (b) is usually filled with gas, but it is also possible to use a hollow part that is vacuum. Examples of the gas that can be filled in the hollow portion include air, aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, fluorinated chlorinated hydrocarbons, and volatile monomers. Of these, aliphatic hydrocarbons are preferred.

The average particle diameter of (b) component is 0.1-200 micrometers normally, Preferably it is 1-150 micrometers. When the average particle diameter is in such a range, a coating film having high smoothness can be formed. In addition, concealability, infrared reflectivity and the like can be improved.
(B) the density of components usually 0.01 to 1 g / cm ^3, preferably 0.01 to 0.5 g / cm ^3. When the density is in such a range, heat insulation, light weight, etc. can be enhanced.

  (C) Infrared reflective powder in the heat-insulating paint of the present invention is a component having a function of suppressing heat accumulation of the coating film by sunlight. Examples of the component (c) include aluminum flake, titanium oxide, barium sulfate, zinc oxide, calcium carbonate, silicon oxide, iron oxide, magnesium oxide, zirconium oxide, yttrium oxide, indium oxide, and alumina (however, (Excluding component (b)). These can be used alone or in combination of two or more. Among these, in this invention, 1 or more types chosen from a titanium oxide and a zinc oxide are suitable.

As the component (c), a spectral reflectance with respect to light having a wavelength of 800 to 2100 nm is measured, and a value obtained by calculating an average value thereof is 20% or more (preferably 40% or more, more preferably 50% or more). Are preferred.
(C) The average particle diameter of a component is 0.1-50 micrometers normally, Preferably it is 0.1-10 micrometers, More preferably, it is 0.1-1 micrometer. When the average particle diameter is in such a range, infrared reflectivity can be enhanced.

In the present invention, it is desirable to use (d) a carboxyl group-containing dispersant (hereinafter referred to as “component (d)”) as the dispersant for component (c). By using such a dispersant, it is possible to further improve the swelling prevention property and the peeling prevention property. This is particularly effective when the component (a-1), the component (a-2), or the component (a-3) is used as the synthetic resin emulsion.
Examples of the component (d) include polyacrylic acid, styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, styrene-methacrylic acid-acrylic ester copolymer, styrene-maleic acid copolymer, and amylene. -Maleic acid copolymers, etc., or ammonium salts, organic amine salts, alkali metal salts and the like thereof. These can be used alone or in combination of two or more.
The amount of component (d) used depends on the type and specific surface area of component (c), but is usually about 0.01 to 5 parts by weight, preferably 0.05 to 2 parts per 100 parts by weight of component (c). About parts by weight.

The weight ratio of each component in the heat insulating paint is 0.5 to 200 parts by weight (preferably 1 to 100 parts by weight) of component (b) and 100 parts by weight of component (b) with respect to 100 parts by weight of solid content of component (a). Is 1 to 400 parts by weight (preferably 2 to 200 parts by weight). By mixing each component in such a ratio in the heat insulating paint, it is possible to form a coating film having excellent heat insulation and infrared reflectivity, high adhesion to the top coating material, and sufficient coating strength. It becomes possible.
When the component (b) is less than 0.5 part by weight, sufficient heat insulating performance cannot be obtained. When the amount is more than 200 parts by weight, swelling, peeling, cracking and the like are likely to occur.
When the amount of the component (c) is less than 1 part by weight, the coating film is easily stored by sunlight. In addition, sufficient coating strength cannot be obtained, and swelling, peeling and the like are likely to occur. When the amount is more than 400 parts by weight, peeling, cracking and the like are likely to occur.

In the heat-insulating paint of the present invention, in addition to the above-mentioned components, additives that can be blended in a normal paint can be added within a range that does not impair the effects of the present invention. Examples of such additives include crosslinking agents, catalysts, aggregates, matting agents, fibers, thickeners, leveling agents, plasticizers, film-forming aids, antifreezing agents, antiseptics, antibacterial agents, Examples include glazes, dispersants, antifoaming agents, pH adjusters, ultraviolet absorbers, and antioxidants.
The heat-insulating paint of the present invention can be produced by mixing the above components by a conventional method. Moreover, if it is a grade which does not inhibit the effect of this invention, a heat insulating coating material can also be colored. In this case, it is desirable that the hue of the heat insulating paint is set so as to be the same color as the hue of the top coat material.

The heat insulating paint of the present invention is mainly applied to the surface of a building exterior such as an outer wall, a roof, or a rooftop. Among these, it can be suitably applied particularly to the outer wall surface.
The base material of the exterior surface is not particularly limited, and examples thereof include concrete, mortar, metal, plastic, or various boards such as a slate plate, an extruded plate, a siding board, and an ALC plate. These base materials may have already been formed with a coating film. The heat-insulating paint is applied mainly to existing buildings, but various boards can be pre-coated at a factory or the like in advance. The building to be painted may be a newly built property or a renovated property.

In particular, since the heat-insulating paint of the present invention is excellent in adhesion to various existing coating films, it can be suitably used for renovation and refurbishment. At this time, the heat insulating paint of the present invention can exhibit the function of adjusting the base and the function of adjusting the surface shape, and can be finished to a shape different from the surface shape of the existing coating film.
Examples of the surface shape of the coating film formed by the heat insulating paint include a smooth shape, a yuzu skin shape, a spray tile shape, and a ripple shape. By giving such a three-dimensional surface shape, a pattern more similar to natural stone can be expressed in the final finish.

  The heat-insulating paint of the present invention can be directly applied to the substrate to be coated. Before applying the heat-insulating paint, for example, a sealer or a filler may be applied.

In the application of the heat insulating paint, a known coating instrument can be used. For example, a spray, a roller, a brush, a trowel, or the like can be used as the coating instrument. When pre-coating is performed, a roll coater, a flow coater or the like can also be used. When painting, the paint can be diluted with water. What is necessary is just to set the mixing amount of water suitably according to the coating instrument to be used, a desired surface shape, etc.
Since the heat-insulating paint in the present invention has a suitable thixotropy, a coating film having a thickness of the order of mm can be formed with a small number of coatings. At this time, even if painting is performed on a vertical surface such as a wall surface, the occurrence of dripping can be sufficiently prevented. The dry film thickness of the coating film formed with the heat insulating paint is usually 0.1 to 10 mm, preferably 0.5 to 5 mm.

In the present invention, after applying the above-mentioned heat-insulating paint to the surface of the building exterior surface, as a top coating material, at least one kind of colored resin particles is dispersed in a transparent dispersion medium Apply paint. Such a top coating material has a specific gravity smaller than that of a natural stone-like coating material mainly composed of an inorganic aggregate, and can exhibit a natural stone-like appearance with a thin film thickness. Therefore, the load on the heat-insulating coating layer is reduced by reducing the weight of the top coat layer, and a decrease in adhesion can be suppressed.
The pattern formed by the top coating material can be appropriately adjusted depending on the hue, particle diameter, mixing ratio, and the like of the colored resin particles, and other various patterns can be widely expressed as well as general natural stone-like patterns.

Multi-color paints are defined in JIS K5667 (2002) “Multi-color paints”. Oil-in-water type (O / W type), water-in-oil type (depending on the combination of dispersion medium and colored resin particles constituting the paint) W / O type), oil-in-oil type (O / O type), and water-in-water type (W / W type). Among them, the oil-in-water type (O / W type) or the water-in-water type (W / W type) is preferable in the present invention.
The oil-in-water type (O / W type) multicolored paint is obtained by dispersing colored resin particles containing a solvent-based resin and a coloring material in an aqueous dispersion medium. The water-in-water type (W / W type) multicolor pattern paint is obtained by dispersing colored resin particles containing an aqueous resin and a coloring material in an aqueous dispersion medium.
Examples of the resin in the colored resin particles include solvent-soluble types such as acrylic, urethane, vinyl acetate, vinyl acrylate, acrylic urethane, acrylic silicon, fluorine, polyvinyl alcohol, biogum, galactomannan derivatives, alginic acid derivatives, and cellulose derivatives. Resins, non-aqueous dispersion resins, water-soluble resins, water dispersion resins and the like can be used. These resins may have a functional group that can be cross-linked by a curing agent or a curing catalyst.

  The coloring material is not particularly limited as long as it is a pigment or colored powder that can be generally blended into a paint, but it is desirable to contain an infrared reflecting powder and / or an infrared transmitting powder. By containing such a component, it is possible to color the top coat material in a desired color while suppressing heat storage of the top coat layer due to sunlight.

  As the infrared reflective powder, those similar to the component (c) of the heat insulating paint can be used. For example, aluminum flakes, titanium oxide, barium sulfate, zinc oxide, calcium carbonate, silicon oxide, iron oxide, Examples thereof include magnesium oxide, zirconium oxide, yttrium oxide, indium oxide, and alumina. These can be used alone or in combination of two or more.

Examples of the infrared transmitting powder include perylene pigment, azo pigment, yellow lead, petal, vermilion, titanium red, cadmium red, quinacridone red, isoindolinone, benzimidazolone, phthalocyanine green, phthalocyanine blue, cobalt blue, Induslen blue, ultramarine blue, bitumen and the like can be mentioned, and one or more of these can be used. There is a limit to the hue that can be expressed only by using an infrared reflective powder as a coloring material, but it is possible to form coating films of various hues by appropriately combining these infrared transparent powders. Become.
In addition, as an infrared transparent powder, the value obtained by measuring the spectral transmittance with respect to light having a wavelength of 800 to 2100 nm and calculating the average value thereof is 20% or more (preferably 40% or more, more preferably 50 % Or more) is preferable.

Further, the colored resin particles may contain hollow particles.
As the hollow particles, those similar to the hollow particles (b) of the heat-insulating paint can be used.
By including hollow particles in the colored resin particles, it is possible to improve the heat insulating property of the paint film of the multicolored paint and to reduce the weight, which is preferable.
As the hollow particles contained in the colored resin particles, those having a constituent component as a resin component are preferable because the thermal conductivity is low and the heat insulation is further improved.
Further, among the closed cell type hollow particles and the open cell type hollow particles, closed cell type hollow particles can be preferably used as the hollow particles. When closed cell-type hollow particles are used, it is possible to prevent intrusion of a resin component or the like into the cell, so that high heat insulation performance can be exhibited.
The average particle diameter of the hollow particles is usually 0.1 to 200 μm, preferably 1 to 150 μm. When the average particle diameter is in such a range, the concealability, infrared reflectivity and the like can be improved. The density of the hollow particles is usually 0.01 to 1 g / cm ³ , preferably 0.01 to 0.5 g / cm ³ . When the density is in such a range, heat insulation, light weight, etc. can be enhanced.

The colored resin particles are obtained by dispersing a mixture containing the resin as described above, a coloring material, and, if necessary, hollow particles and various additives into particles.
Examples of additives include dispersion stabilizers, matting agents, fibers, antifoaming agents, thickeners, leveling agents, film-forming aids, antifreezing agents, dispersing agents, antifungal agents, antiseptics, and pH adjusters. , Ultraviolet absorbers, antioxidants, catalysts, crosslinking agents, and the like.

The particle diameter of the colored resin particles is usually about 0.01 to 15 mm, preferably about 0.1 to 10 mm, and more preferably about 0.7 to 5 mm.
The colored resin particles themselves may be either those having film forming performance or those having no film forming performance. Usually, if the inside of the colored resin particles is liquid, it has film forming performance, and if the gelation degree inside the colored resin particles is high, the film forming performance is lowered. When the colored resin particles themselves do not have film forming performance, the resin may be mixed in the dispersion medium.

As the colored resin particles in the water-in-water (W / W type) multicolor pattern paint, a gelled product derived from an aqueous resin, a coloring material, water, and a reactive compound capable of reacting in the presence of water is preferable. More preferable colored resin particles are obtained by mixing an aqueous resin having a reactive functional group, a coloring material, and a water-based paint containing water with a reactive compound capable of reacting in the presence of water. It can be obtained by dispersing in a medium and mixing a reactive compound capable of reacting with the aqueous resin in the presence of water.
By using such colored resin particles, the coating properties such as weather resistance and water resistance of the top coating material are enhanced, and the initial multicolored pattern can be maintained for a long time.

The dispersion medium in the multicolor pattern paint only needs to have transparency that does not hinder the color development of the colored resin particles during the formation of the coating film. Within the range having such transparency, the dispersion medium includes resin, dispersion stabilizer, matting agent, fiber, antifoaming agent, thickener, leveling agent, film-forming aid, antifreezing agent, dispersing agent, An antifungal agent, an antiseptic, a pH adjuster, an ultraviolet absorber, an antioxidant, a catalyst, a crosslinking agent, and the like can be mixed.
In both the oil-in-water type (O / W type) and the water-in-water type (W / W type), an aqueous dispersion medium is used. As the medium of the aqueous dispersion medium, water is mainly used, but an organic solvent that is easily soluble in water can be used in combination.

  As the multicolored paint in the present invention, the resin in the colored resin particles and / or the resin in the dispersion medium is (p) a synthetic resin (hereinafter referred to as a synthetic resin having a residual silica ratio of 0.1 to 50% by weight in the solid content) Those containing “(p) component”) are preferred. If such a component (p) is used, the water vapor permeability of the top coating material layer, the adhesion between the top coating material layer and the heat-insulating coating layer is improved, and the occurrence of blistering or peeling of the coating film is more reliably achieved. It becomes possible to prevent. In addition, since the component (p) has a property of suppressing adhesion of pollutants derived from exhaust gas or the like, heat storage due to these pollutants can also be prevented. The component (p) is obtained by using a reactive silyl group-containing compound as an essential component.

As the component (p), for example,
(I) a synthetic resin obtained by copolymerizing a reactive silyl group-containing monomer,
(Ii) a synthetic resin obtained by adding a silane compound to a resin obtained by copolymerizing at least one monomer selected from a reactive silyl group-containing monomer, a hydroxyl group-containing monomer, and a carboxyl group-containing monomer;
(Iii) a synthetic resin obtained by reacting a functional group in the resin with a silane coupling agent having a functional group capable of reacting with the functional group,
(Iv) a synthetic resin obtained by reacting a functional group in the resin with a silane coupling agent having a functional group capable of reacting with the functional group, and further adding a silane compound;
Etc. Among these, either (ii) or (iv) is particularly suitable in terms of swelling prevention, peeling prevention and the like.

  The reactive silyl group is a group in which an alkoxyl group, a hydroxyl group, a phenoxy group, a mercapto group, an amino group, a halogen, or the like is bonded to a silicon atom. Among these, one or more selected from an alkoxysilyl group in which an alkoxyl group is bonded to a silicon atom and a silanol group in which a hydroxyl group is bonded to a silicon atom are particularly preferable.

  The reactive silyl group-containing monomer in (i) and (ii) is a compound containing a reactive silyl group and a polymerizable double bond, such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri-n-butoxy. Silane, vinyltris (β-methoxyethoxy) silane, allyltrimethoxysilane, trimethoxysilylethyl vinyl ether, triethoxysilylethyl vinyl ether, trimethoxysilylpropyl vinyl ether, triethoxysilylpropyl vinyl ether, γ- (meth) acryloyloxypropyltrimethoxy Silane, γ- (meth) acryloyloxypropyltriethoxysilane, γ- (meth) acryloyloxypropylmethyldimethoxysilane, vinylmethyldimethoxysilane, methyldimethoxysilylethylbi Nyl ether, methyldimethoxysilylpropyl vinyl ether and the like can be mentioned, and one or more of these can be used.

Examples of the hydroxyl group-containing monomer in (ii) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxyethyl vinyl ether, and the like. 1 type (s) or 2 or more types can be used.
Examples of the carboxyl group-containing monomer in (ii) include (meth) acrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid, maleic anhydride, itaconic anhydride, and the like, one or two of these. The above can be used.

  As the silane compound in (ii) and (iv), those having two or more reactive silyl groups in one molecule are used. For example, tetrafunctional alkoxysilanes such as tetraethoxysilane, tetramethoxysilane, tetrabutoxysilane, etc. Class: methyltrimethoxysilane, methyltriethoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltributoxysilane, propyltrimethoxysilane, propyltriethoxysilane, butyltrimethoxysilane, butyltriethoxy Trifunctional alkoxysilanes such as silane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltributoxysilane; dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldibutoxysilane, diethyldimethyl Toxisilane, Diethyldiethoxysilane, Dipropyldimethoxysilane, Dipropyldiethoxysilane, Dibutyldimethoxysilane, Dibutyldiethoxysilane, Diphenyldimethoxysilane, Diphenyldiethoxysilane, Diphenyldibutoxysilane, Methylphenyldimethoxysilane, Methylphenyldiethoxy Bifunctional alkoxysilanes such as silane; tetrachlorosilane, methyltrichlorosilane, ethyltrichlorosilane, propyltrichlorosilane, phenyltrichlorosilane, vinyltrichlorosilane, dimethyldichlorosilane, diethyldichlorosilane, diphenyldichlorosilane, methylphenyldichlorosilane, etc. Chlorosilanes: tetraacetoxysilane, methyltriacetoxysilane, phenyltriacetoxy Emissions, dimethyldiacetoxysilane, acetoxy silanes such as diphenyl diacetoxy silane and the like, can be used one or two or more thereof. Moreover, the compound which has one reactive silyl group in 1 molecule can also be used together. In the present invention, it is particularly desirable to use trifunctional alkoxysilanes and bifunctional alkoxysilanes in combination.

  Examples of the combination of functional groups in (iii) and (iv) include a hydroxyl group and an isocyanate group, an amino group and an isocyanate group, a carboxyl group and an epoxy group, an amino group and an epoxy group, and an alkoxysilyl group. The silane coupling agent is, for example, a compound having at least one reactive silyl group and other substituents in one molecule, and specifically, β- (3,4-epoxycyclohexyl) ethyltrimethoxy. Silane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyltriethoxysilane, N- (β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, N- (β-aminoethyl) -γ -Aminopropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, isocyanate functional silane and the like can be mentioned, and one or more of these can be used.

  Examples of the copolymerizable monomer of component (p) include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and cyclohexyl. (Meth) acrylate monomers such as (meth) acrylate; amino group-containing monomers such as dimethylaminoethyl (meth) acrylate and dimethylaminopropyl (meth) acrylate; amides such as (meth) acrylamide and ethyl (meth) acrylamide Group-containing monomers; Nitrile group-containing monomers such as acrylonitrile; Epoxy group-containing monomers such as glycidyl (meth) acrylate; Aromatic vinyl monomers such as styrene, methylstyrene, chlorostyrene, vinyltoluene; Sulfonic acid-containing vinyl monomers such as acid and vinyl sulfonic acid; acid anhydrides such as maleic anhydride and itaconic anhydride; chlorine-containing monomers such as vinyl chloride, vinylidene chloride and chloroprene; ethylene glycol monoallyl ether and propylene glycol monoallyl An alkylene glycol monoallyl ether such as ether or diethylene glycol monoallyl ether; a vinyl ester monomer such as vinyl acetate or vinyl propionate; ethylene, propylene, isobutylene or the like can be used. These can be used alone or in combination of two or more. In addition, an ethylenically unsaturated double bond-containing ultraviolet absorber, an ethylenically unsaturated double bond-containing light stabilizer, and the like can also be used.

  (P) Tg of a component is -20-100 degreeC normally, Preferably it is -5-80 degreeC. When Tg is lower than −20 ° C., swelling, peeling and the like are likely to occur. In addition, contaminants are easily adhered, and the top coat layer is likely to store heat. When Tg is higher than 100 ° C., the top coat layer is likely to be cracked.

The silica remaining ratio in the component (p) is 0.1 to 50% by weight, preferably 0.5 to 40% by weight, more preferably 1 to 30% by weight in terms of SiO _{2 in} the solid content of the component (p). It is. When the silica remaining ratio is in such a range, it is possible to improve the swelling prevention property, the peeling prevention property, the stain resistance, the weather resistance, and the like. When the ratio of the remaining amount of silica of the component (p) is too small, swelling and peeling are likely to occur. In addition, the contaminants are easily adhered, and the coating film is likely to store heat. When there are too many silica residual ratios, there exists a possibility of causing an adhesive defect, a crack generation, etc.

The silica remaining ratio is expressed by the weight remaining as silica (SiO ₂ ) when the compound having a Si—O bond is completely hydrolyzed and then baked at 900 ° C. .
In general, alkoxysilanes, silicates, and the like have the property of reacting with water to cause hydrolysis reaction to form silanol, and further causing condensation reaction between silanols or silanol and alkoxy. When this reaction is performed to the ultimate, silica (SiO ₂ ) is obtained. These reactions have the general formula:
RO (Si (OR) ₂ O) _n R + (n + 1) H ₂ O → nSiO ₂ + (2n + 2) ROH
It is expressed by the reaction formula. The silica remaining amount ratio in the present invention is obtained by converting the amount of the remaining silica component based on this reaction formula.

The above-mentioned top coating material can be applied after the coating film surface of the heat insulating paint is dried.
In the coating of the top coat material, a known coating device can be used. For example, a spray, a roller, a brush, a trowel, a spatula, or the like can be used as the coating instrument. During coating, the paint can be diluted with water or the like. What is necessary is just to adjust a dilution ratio suitably according to the coating instrument etc. to be used.
The dry film thickness of the coating film formed by the top coating material is usually about 50 to 1000 μm.

In the present invention, a clear paint can be applied as necessary. The clear coating is not particularly limited, and known ones can be used. For example, an acrylic resin system, a urethane resin system, an acrylic silicon resin system, a fluororesin system, etc. are mentioned. The clear paint may be either water-based or solvent-based, and the degree of gloss (matte type, glossy type, etc.) is not particularly limited.
As the clear paint, those excellent in weather resistance and those excellent in stain resistance are particularly preferable. For example, acrylic silicone resin-based and fluororesin-based clear paints are preferable.
The clear coating may be performed by a known coating method, for example, by various coating methods such as spray coating, roller coating, and brush coating. The dry film thickness of the clear paint is usually about 10 to 200 μm.

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

(Synthesis Example 1)
A reaction vessel was charged with 70 parts by weight of deionized water and 0.2 parts by weight of sodium alkylbenzenesulfonate, and the temperature was raised to 70 ° C. while stirring and nitrogen substitution, and 0.4 parts by weight of ammonium persulfate was added. To this, separately prepared emulsion monomer for forming a core (21.05 parts by weight of styrene and 54.14 n-butyl acrylate in an aqueous solution in which 0.1 parts by weight of sodium alkylbenzenesulfonate was dissolved in 20 parts by weight of deionized water). Parts by weight, and 2.50 parts by weight of glycidyl methacrylate emulsified and dispersed) were continuously added dropwise over 3 hours. After completion of the dropwise addition, the mixture was aged for 2 hours, and then an emulsion monomer for forming a shell part (5.24 parts by weight of styrene in an aqueous solution in which 0.1 parts by weight of sodium alkylbenzenesulfonate was dissolved in 10 parts by weight of deionized water, n- Emulsified and dispersed 13.54 parts by weight of butyl acrylate, 1.51 parts by weight of methacrylic acid, and 2.00 parts by weight of acrylamide) was continuously added dropwise over 2 hours. After completion of dropping, aging was performed for 2 hours. Subsequently, after adding ammonia water and adjusting pH to 7.5, the multilayered structure emulsion 1 was obtained by filtering with a 200 mesh metal-mesh.

(Synthesis Examples 2 to 4)
An emulsion was produced in the same manner as in Synthesis Example 1 except that the monomer components shown in Table 1 were used. In addition, the number in a table | surface shows a weight part (however, except Tg).

(Insulating paint 1-8)
For the emulsion obtained by the above synthesis example, hollow particles, infrared reflective powder and the like are mixed in the ratios shown in Table 2 (numbers in the table are parts by weight) and stirred uniformly to obtain a heat insulating paint 1 8 was produced. The raw materials used for the heat insulating paint are as follows.
-Crosslinking agent 1: Polyhydroxyalkane polyglycidyl ether-Crosslinking agent 2: 2-isopropenyl-2-oxazoline-methyl methacrylate-ethyl acrylate copolymer-Crosslinking agent 3: Adipic acid dihydrazide-Hollow particles: Closed-cell type hollow resin Beads (acrylic-acrylonitrile copolymer resin, average particle size 45 μm, density 0.025 g / cm ³ )
・ Infrared reflective powder: Titanium oxide (average particle size 0.3μm)
Dispersant: Styrene-maleic acid copolymer (solid content 30% by weight)
-Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Polycarboxylic acid thickener-Antifoaming agent: Silicone defoamer

(Coating material 1)
While mixing 200 parts by weight of water-dispersible resin A in a container and stirring at a rotational speed of the stirring blade of 1800 rpm, uniformly mix 4 parts by weight of water-soluble resin A, 1 part by weight of antifoaming agent, and 380 parts by weight of water. By mixing, a transparent paint (I) was produced.
Next, 85 parts by weight of water-dispersible resin B is charged in another container, and while stirring at a rotational speed of the stirring blade of 1800 rpm, 250 parts by weight of water-soluble resin B, 90 parts by weight of white pigment liquid, and antifoaming agent White water-based paint (II) was produced by uniformly mixing 5 parts by weight and 50 parts by weight of water.
10 parts by weight of an aqueous solution of ammonium borate 5% by weight as a dispersion stabilizer is added to 585 parts by weight of the transparent paint (I) described above, and the stirring blade is rotated uniformly at a rotation speed of 900 rpm. A mixture of 480 parts by weight of water-based paint (II) and 10 parts by weight of reactive compound A was gradually added and dispersed. Furthermore, the coating composition in which the white resin particle was disperse | distributed was obtained by adding 3 weight part of reactive compound B, continuing stirring.

Next, except that each raw material was used in the mixing ratio shown in Table 3, a coating material was produced by the same method as the above method, a coating composition in which gray resin particles were dispersed, and a coating material in which black resin particles were dispersed A composition was obtained.
The top coating material 1 was obtained by mixing the above three coating compositions in a ratio of 30:40:30 (white: gray: black).

The following raw materials were used in the production of the top coat material.
Water-dispersible resin A: acrylic silicon resin emulsion (Tg 0 ° C., solid content 50% by weight, pH 7, silica remaining ratio 3% by weight, methyl methacrylate-n-butyl acrylate-γ-methacryloyloxypropyltrimethoxysilane-acrylic acid 2-Methyltrimethoxysilane / dimethyldimethoxysilane adduct of 2-hydroxyethyl methacrylate copolymer)
Water-dispersible resin B: acrylic resin emulsion (Tg 0 ° C., solid content 50% by weight, pH 7, methyl methacrylate-butyl acrylate-acrylic acid copolymer)
Water-soluble resin A: hydroxyethyl cellulose powder Water-soluble resin B: 3% by weight galactomannan aqueous solution White pigment liquid: titanium oxide 60% by weight dispersion Black pigment liquid: black iron oxide 15% by weight dispersion Hollow particles: Closed-cell hollow resin beads (acrylic-acrylonitrile copolymer resin, average particle size 45 μm, density 0.025 g / cm ³ )
Reactive compound A: Butoxy modified product of tetramethoxysilane condensateReactive compound B: 2,2-bishydroxymethylbutanol-tris [3- (1-aziridinyl) propionate]
・ Defoamer: Silicone-based defoamer

(Coating material 2)
Except that each raw material was used in the mixing ratio shown in Table 3, a coating material was produced by the same method as the above method, a coating composition in which white resin particles were dispersed, a coating composition in which gray resin particles were dispersed, and A coating composition in which black resin particles were dispersed was obtained.
The top coating material 2 was obtained by mixing the above three coating compositions in a ratio of 30:40:30 (white: gray: black).

(Coating material 3)
Except that each raw material was used in the mixing ratio shown in Table 3, a coating material was produced by the same method as the above method, a coating composition in which white resin particles were dispersed, a coating composition in which gray resin particles were dispersed, and A coating composition in which black resin particles were dispersed was obtained.
The top coating material 3 was obtained by mixing the above three coating compositions at a ratio of 30:40:30 (white: gray: black).

Example 1
Spray coating of heat-insulating paint 1 on a slate plate of 300 x 225 mm and drying for 8 hours in an atmosphere of 23 ° C. and 50% RH (hereinafter referred to as “standard state”), then spray-coating the top coating 1 A test plate was prepared. At this time, the heat-insulating paint was applied so that the dry film thickness was about 1 mm, and the overcoat material was applied so that the dry film thickness was about 100 to 500 μm. The appearance of the test plate was a granite tone pattern.
After curing for 14 days in the standard state, a total of 20 cycles of hot / cold repeated tests with one cycle of water immersion for 18 hours → -20 ° C for 3 hours → 50 ° C for 3 hours were observed, and changes in the surface state of the coating film were observed visually. However, no abnormalities were found.

On the other hand, a 450 × 450 × 450 mm box was prepared using a 12 mm thick slate plate in order to conduct a heat insulation test. The heat insulating paint 1 was spray-coated on the surface, dried for 8 hours in a standard state, and then the top coating material 1 was spray-coated and further cured for 14 days to obtain a test body for the heat insulating test. At this time, the heat-insulating paint was applied so that the dry film thickness was about 1 mm, and the overcoat material was applied so that the dry film thickness was about 100 to 500 μm.
The obtained specimen was irradiated with an infrared lamp (250 W) from a distance of 60 cm for 90 minutes. During this time, the temperature change inside the box was measured, and the temperature change was less than 5 ° C.

(Examples 2-7, Comparative Examples 1-3)
The test was performed in the same manner as in Example 1 except that the heat insulating paint and the top coat material shown in Table 4 were used. The test results are shown in Table 4. In the hot and cold repeated test, the presence or absence of swelling, peeling, cracking, etc. was evaluated visually. The evaluation is “◎” when no abnormality was observed in 20 cycles, “◯” when no abnormality was observed in 10 cycles, but “◯” when no abnormality was observed in 20 cycles, and no abnormality was observed in 5 cycles. However, the case where abnormality was observed in 10 cycles was indicated as “Δ”, and the case where abnormality was observed in 5 cycles was indicated as “x”.
In addition, the evaluation of the heat insulation test was “◯” when the temperature change was less than 5 ° C., “△” when the temperature change was 5 ° C. or more and less than 10 ° C., and the temperature change was 10 ° C. or more. "X" was used.

Claims (4)

For the exterior surface of the building,
(A-1) the glass transition temperature (hereinafter referred to as "Tg") and is -40～20 ° C., crosslinking agent having a crosslinking reactive synthetic resin emulsion, functional group reactive with an epoxy group having an epoxy group, (b ) Hollow particles, and (c) Infrared reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) with respect to 100 parts by weight of the solid content of component (a), component 1 After applying a heat insulating paint which is ~ 400 parts by weight,
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm . Method for forming a coating film. For the exterior surface of the building,
(A-2) Tg is −40 to 20 ° C. and has a functional group capable of reacting with an epoxy group and has a functional group capable of reacting with an epoxy group, a crosslinking agent having an epoxy group, (b) hollow particles, and (c) infrared rays Insulating paint containing reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) and 1 to 400 parts by weight of component (c) with respect to 100 parts by weight of solid content of component (a) After applying
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm. Method for forming a coating film. For the exterior surface of the building,
(A-3) including at least two layers of a core part and a shell part, wherein the Tg of the shell part is -20 to 20 ° C, the Tg of the core part is -40 to 0 ° C, and the Tg of the shell part is the core A cross-linked multilayer emulsion having a functional group capable of reacting with the epoxy group in the shell, (b) hollow particles, and (c) infrared rays. Insulating paint containing reflective powder, the weight ratio of which is 0.5 to 200 parts by weight of component (b) and 1 to 400 parts by weight of component (c) with respect to 100 parts by weight of solid content of component (a) After applying
A heat insulating property characterized by applying a multi-pattern paint in which at least one or more kinds of colored resin particles are dispersed to a transparent dispersion medium so that a dry film thickness of the formed coating film is 50 to 1000 μm. Method for forming a coating film. The heat insulating coating film according to any one of claims 1 to 3, wherein the multicolored paint includes a synthetic resin having a silica remaining ratio in a solid content of 0.1 to 30 % by weight. Forming method.