JP2010216223A - Heat insulating structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent cracking of a coating film and to stably exhibit follow-up performance to backing over a long period of time in a coating finished surface to the backing of an external wall of a building with lightweight mortar laminated on a base material. <P>SOLUTION: This heat insulating structure has, from the indoor side of a wall surface toward the outside side, a base material layer (A), an inorganic heat insulating layer (B) formed of lightweight mortar containing cement and lightweight aggregate as essential components, and an undercoating layer (C) formed of an undercoating material containing synthetic resin with a glass transition temperature of -60 to 40°C, a resin component combined with a light stabilizer and/or an ultraviolet absorber, and inorganic powder and grain whose pigment volume concentration is 30-80%, and a finishing material layer (D) formed of a finish coating material containing granular aggregate at 100-2,000 pts.wt. to 100 pts.wt. of the resin component that can form a transparent coat. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating structure constituting an outer wall surface of a building.

  In recent years, in buildings such as houses, stores, factories, etc., there are active efforts to realize energy saving by saving air conditioning costs by increasing heat insulation and airtightness. In general, in buildings that have not been designed for thermal insulation, indoor heat escapes from parts such as roofs, floors, windows, and walls during heating in winter, and outdoor heat enters through these parts during cooling in summer. It is said that about one third of such heat loss is caused by the wall surface. Therefore, in order to realize energy saving in buildings, it is indispensable to increase the heat insulation of the outer wall that separates the room from the outside, and many methods have been proposed to increase heat insulation by laminating heat insulating materials on the base material that constitutes the wall surface. ing.

  One such heat insulating material is a lightweight mortar. Lightweight mortar is a material mainly composed of cement, lightweight aggregate, etc., and has excellent heat insulation properties, and has the ability to prevent the spread of fire from nearby fires. Is used. In addition, with a lightweight mortar, a seamless appearance finish can be obtained, and in addition, in order to improve its aesthetics, a finish can be applied with a finish coating material (for example, Patent Document 1).

  However, lightweight mortars may crack over time due to the characteristics of the material. Such cracks spread to the finishing material layer and impair the finished appearance.

Patent Document 2 describes that as a technique for suppressing cracks in the finishing material layer, a slightly elastic undercoat film is provided on a base material, and a stone-like paint film is provided thereon.
However, in the coating film obtained by the method of Patent Document 2, sunlight reaches the slightly elastic undercoating film by sewing the gap between the aggregates constituting the stone-like coating film. For this reason, the undercoat coating film deteriorates with time, and the performance of the microelasticity tends to decrease. In such a deteriorated undercoat film, it is difficult to follow the displacement of the base material, and cracking is likely to occur, and the adverse effect may extend to the upper stone-like paint film. When such a crack occurs, it is not possible to prevent water from entering the base material layer and the inorganic heat insulating layer, which causes deterioration of each layer.

Japanese Patent No. 2567021 JP 2000-265088 A

  The present invention has been made in view of such a problem, and on the finished surface of the base of the building outer wall in which lightweight mortar is laminated on the base material, the coating film is prevented from cracking, and the followability to the base is maintained for a long time. The purpose is to exhibit it stably.

  In order to solve such problems, the present inventors have conducted intensive studies, and as a result, on the inorganic heat insulating layer formed of lightweight mortar, it is possible to form a coating film by using a specific primer and finish coating material, respectively. As a result, the present invention has been completed.

That is, the present invention has the following characteristics.
1. It is a heat insulating structure that constitutes the outer wall surface of the building, from the indoor side to the outdoor side of the wall surface,
Base material layer (A),
An inorganic heat insulating layer (B) formed of a lightweight mortar containing cement and lightweight aggregate as essential components,
A pigment volume concentration of the inorganic powder including a resin component obtained by combining a synthetic resin having a glass transition temperature of −60 to 40 ° C., a light stabilizer and / or an ultraviolet absorber, and an inorganic powder. An undercoat layer (C) formed by an undercoat material having a content of 30 to 80%,
Finishing material layer (D) formed by a finishing coating material containing 100 to 2000 parts by weight of granular aggregate with respect to 100 parts by weight of resin component capable of forming a transparent film
A heat insulating structure characterized by comprising:
2. The finishing material layer (D)
Scale-like particles having a granular aggregate of 100 to 2000 parts by weight and a ratio of average particle diameter to average thickness (average particle diameter / average thickness) of 2/1 or more with respect to 100 parts by weight of the resin component capable of forming a transparent film Finishing material layer (D) formed by a finishing coating material containing 3 to 500 parts by weight of
It is characterized by being 1. The described heat insulating structure.
3. The resin component in the finish coating material is
1. A resin component in which a synthetic resin is combined with a light stabilizer and / or an ultraviolet absorber. Or 2. The heat insulation structure described in 1.
4). The finish coating material contains water-dispersible silica having a particle diameter of 1 to 200 nm and / or a fluorine-containing compound having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group. ~ 3. The heat insulation structure in any one of.
5. The finish coating material contains fibers having a fiber length of 0.1 to 10 mm. ~ 4. The heat insulation structure in any one of.

  According to the present invention, it is possible to sufficiently suppress the occurrence of cracking of the coating film over a long period of time on the painted finish surface of the building outer wall using lightweight mortar, and prevent water from entering the base material layer and the inorganic heat insulating layer. Can be achieved. Therefore, in this invention, durability of the whole heat insulation structure can be improved, and also the performance can be maintained over a long period of time.

[Base material layer]
The base material layer (A) in the present invention is not particularly limited as long as it constitutes the outer wall surface of the building. For example, concrete, mortar, cement board, extruded plate, slate plate, PC plate, ALC plate, Fiber reinforced cement board, metal board, porcelain tile, metal siding board, ceramic siding board, ceramic board, gypsum board, plastic board, hard wood cement board, PVC extrusion siding board, plywood, etc. can give. Such a base material layer may have some surface treatment layer (for example, a sealer layer, a surfacer layer, etc.).

[Inorganic insulation layer]
The inorganic heat insulating layer (B) is formed of a lightweight mortar containing, as essential components, cement as an inorganic binder and a lightweight aggregate. Specifically, it is obtained by curing a kneaded material containing cement, lightweight aggregate, and water.

  Among these, for example, ordinary Portland cement, early strength Portland cement, super early strength Portland cement, moderately hot Portland cement, sulfate-resistant Portland cement, white Portland cement, alumina cement, ultrafast cement, expanded cement, acidic phosphorus Examples thereof include acid salt cement, silica cement, blast furnace cement, fly ash cement, keens cement and the like.

The lightweight aggregate is a component that imparts performance such as heat insulation, fire resistance, and weight reduction. Examples of such lightweight aggregates include pearlite, expanded vermiculite, pumice, ALC pulverized product, styrene resin foam, ethylene vinyl acetate resin foam, and vinyl chloride resin foam. The lightweight mortar may contain fine aggregate, a setting accelerator, a water reducing agent, a thickener, a fiber material, a dispersant, an organic resin and the like in addition to the above components.
Such a lightweight mortar has an advantage that the specific gravity is about 1/2 of that of a normal mortar, so that the load on the ground is small. In addition, the thermal conductivity is usually about 1/5 that of mortar, and the heat insulation is excellent. Specifically, examples of such lightweight mortar include materials specified in JASS15 M-102 “Prepared lightweight cement mortar for lath-based foundation”, JASS15 M-104 “Lightweight cement mortar for foundation adjustment”, and the like.

[Undercoat layer]
In the present invention, the primer layer (C) is provided on the inorganic heat insulating layer (B) (outdoor side). This undercoat material layer is formed of a resin component in which a synthetic resin having a specific glass transition temperature, a light stabilizer and / or an ultraviolet absorber are combined, and an undercoat material containing an inorganic powder as an essential component.

As the synthetic resin in the undercoat material, one having a glass transition temperature (hereinafter also referred to as “Tg”) of −60 to 40 ° C. (preferably −40 to 30 ° C., more preferably −20 to 20 ° C.) is used. When the Tg of the synthetic resin is within such a range, it is possible to suppress the occurrence of cracks in the finishing material layer while ensuring followability to the base.
Examples of the synthetic resin include vinyl acetate resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, acrylic silicon resin, fluorine resin, or a composite thereof. Among these, one or two or more selected from acrylic resins, urethane resins, acrylic silicon resins, and fluororesins are preferable from the viewpoint of the effects of the present invention. Further, as a form of the synthetic resin, a water-dispersed resin (synthetic resin emulsion) is preferable. In addition, the glass transition temperature in this invention is a value calculated | required from the calculation formula of FOX.

In the undercoat material in the present invention, a composite of the synthetic resin, the light stabilizer and / or the ultraviolet absorber is used as the resin component. In the present invention, by using such a resin component, it is possible to maintain the effect of preventing cracking for a long time.
Examples of the form in which the light stabilizer and / or the ultraviolet absorber are combined with the synthetic resin include one or both of a form dispersed in the synthetic resin and a form chemically bonded to the synthetic resin. In the present invention, a higher effect can be obtained by including at least a state in which the light stabilizer and / or the ultraviolet absorber is chemically bonded to the synthetic resin. It is desirable that the light stabilizer and / or ultraviolet absorber is usually contained in the resin component in an amount of 0.01 to 20% by weight (preferably 0.1 to 10 parts by weight) in terms of solid content.

  Specifically, examples of the light stabilizer include bis (2,2,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 2 -(3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate bis (1,2,2,6,6-pentamethyl-4-piperidyl), tetrakis (2,2, 6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3 Examples include 4-butanetetracarboxylate.

Examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octyloxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, and 2,2′-dihydroxy. Benzophenone ultraviolet absorbers such as -4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2,2-dihydroxy-4,4'-dimethoxybenzophenone-5,5'-disulfonic acid;
2- (2′-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2, 2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol, 2-phenylbenzimidazole-5-sulfonic acid, methyl 3- ( Benzotriazole ultraviolet absorbers such as a reaction product of 3- (2H-benzotriazol-2-yl) -5-t-butyl-4-hydroxyphenyl) propionate and polyethylene glycol;
Salicylic acid ultraviolet absorbers such as phenyl salicylate, pt-butylphenyl salicylate, p-octylphenyl salicylate;
Other examples include triazine ultraviolet absorbers, oxalic anilide ultraviolet absorbers, aminobenzoic acid ultraviolet absorbers, cinnamic acid ultraviolet absorbers, and cyanoacrylate ultraviolet absorbers.

  In the present invention, a polymerizable light stabilizer and / or a polymerizable ultraviolet absorber can be used because the light stabilizer and / or the ultraviolet absorber is chemically bonded to the synthetic resin. Specifically, polymerizable light stabilizers such as 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine, 4-methacryloyloxy-1,2,2,6,6-pentamethylpiperidine, Polymerizable ultraviolet absorbers such as -hydroxy-4-acryloxybenzophenone and 2- (2'-hydroxy-5'-methacryloxyethylphenyl) -2H-benzotriazole can be used. Such a polymerizable light stabilizer and / or polymerizable ultraviolet absorber can be chemically bonded by copolymerizing with other monomers during the production of the synthetic resin (at the time of polymerization).

  Various inorganic powders can be used as the inorganic powder particles in the primer. Specifically, for example, heavy calcium carbonate, precipitated calcium carbonate, kaolin, talc, clay, porcelain clay, china clay, barium sulfate, barium carbonate, quartz sand, quartzite, diatomaceous earth, titanium oxide, zinc oxide, aluminum oxide, oxidation Iron etc. are mentioned, These 1 type (s) or 2 or more types can be used. The average particle diameter of the inorganic powder is usually 0.1 to 100 μm, preferably 1 to 50 μm.

  The undercoat material is prepared so that the pigment volume concentration of the inorganic powder is 30 to 80%, preferably 40 to 70%. With such a pigment volume concentration, a thick undercoat material layer having both elongation and strength can be formed, which is preferable in terms of suppressing cracks in the coating film. When the pigment volume concentration is less than 30%, it is difficult to form a thick coating film, and the strength of the coating film becomes insufficient. Cracks are likely to occur. When the pigment volume concentration is larger than 80%, the followability to the ground becomes insufficient, and the finishing property and adhesion of the finishing material layer may be lowered.

In addition to the above-mentioned components, the primer is, for example, a catalyst, pigment, dye, aggregate, matting agent, fiber, thickener, leveling agent, plasticizer, film-forming aid, antifreezing agent, preservative, antibacterial agent An agent, an antifungal agent, a dispersant, an antifoaming agent, a pH adjusting agent, and the like may be included.
The undercoat material can be produced by uniformly mixing these components by a conventional method, if necessary, in addition to the aforementioned components.

[Finish material layer]
In this invention, a finishing material layer (D) is provided on the said undercoat material layer (C) (outdoor side). This finishing material layer (D) is formed by the finishing coating material containing the resin component which can form a transparent film, and a granular aggregate.

As the resin component in the finish coating material, various synthetic resins can be used as long as a transparent film can be formed. Examples of the synthetic resin include vinyl acetate resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, acrylic silicon resin, fluorine resin, or a composite thereof. Among these, one or more selected from acrylic resins, urethane resins, acrylic silicon resins, and fluororesins are preferable. As a form of the synthetic resin, a water-dispersed resin (synthetic resin emulsion) is suitable. In addition, the transparency of the resin component should just be a grade which can visually recognize a granular aggregate in a finishing material layer.
As the synthetic resin in the finish coating material, those having a Tg of −30 to 60 ° C. (preferably −20 to 50 ° C., more preferably −10 to 40 ° C.) are suitable.

In the finish coating material, a composite of a synthetic resin, a light stabilizer and / or an ultraviolet absorber can be used as the resin component. In the present invention, by using such a resin component, deterioration of the undercoat material layer is suppressed, and the effect of preventing cracking over a long period of time can be further enhanced.
Examples of the form in which the light stabilizer and / or the ultraviolet absorber are combined with the synthetic resin include one or both of a form dispersed in the synthetic resin and a form chemically bonded to the synthetic resin. As the light stabilizer and the ultraviolet absorber, those similar to the primer can be used. It is desirable that the light stabilizer and / or ultraviolet absorber is usually contained in the resin component in an amount of 0.01 to 20% by weight (preferably 0.1 to 10 parts by weight) in terms of solid content.

  As the granular aggregate in the finish coating material, at least one selected from natural aggregates such as natural stones, pulverized natural stones, and artificial aggregates such as colored aggregates can be suitably used. Specifically, for example, marble, granite, serpentine, granite, fluorite, cryolite, feldspar, quartzite, quartz sand, and pulverized products thereof, ceramic pulverized product, ceramic pulverized product, glass pulverized product, glass beads, resin Examples thereof include pulverized products, resin beads, and metal particles. Furthermore, those with a color coating on these surfaces can also be used. By using two or more kinds of such granular aggregates in appropriate combination, various colors can be expressed. In addition, the granular aggregate in this invention has a shape different from the scale-like particle | grains mentioned later.

  The average particle diameter of the granular aggregate is usually 0.01 to 2 mm (preferably 0.02 to 1 mm). The average particle diameter of the granular aggregate is obtained by performing sieving using a metal mesh sieve specified in JIS Z8801-1: 2000 and calculating the average value of the weight distribution.

  The granular aggregate is usually mixed at a ratio of 100 to 2000 parts by weight (preferably 200 to 1500 parts by weight, more preferably 300 to 1000 parts by weight) with respect to 100 parts by weight of the solid content of the resin component. If the mixing ratio of the granular aggregate is within such a range, it is preferable in terms of the design properties and crack prevention properties of the coating film.

  As the finish coating material, in addition to the above-mentioned components, those containing scale-like particles having a ratio of average particle diameter to average thickness (average particle diameter / average thickness) of 2/1 or more can be used. By including such scaly particles in the finish coating material, the effect of the present invention can be enhanced. The reason is not clear, but the scattering of the scaly particles in such a shape in the finishing material layer makes it easier for sunlight to be reflected in the finishing material layer and suppresses deterioration of the primer layer due to sunlight. It is thought that the action to work.

  As such scaly particles, for example, mica, talc, plate-like kaolin, barium sulfate flakes, alumina flakes, glass flakes, shell pieces, metal pieces and other inorganic pieces, rubber pieces, plastic pieces, wood pieces, etc. are used. be able to. These may be provided with a colored coating or the like.

The ratio of the average particle diameter to the average thickness of the scaly particles is 2/1 or more, preferably 3/1 or more, more preferably 4/1 or more. The average particle diameter of the scaly particles is usually 0.05 to 20 mm (preferably 0.1 to 10 mm, more preferably 0.5 to 5 mm). The average thickness of the scaly particles is usually 0.001 to 5 mm (preferably 0.05 to 3 mm, more preferably 0.01 to 2 mm).
The average particle diameter of the scaly particles is a value obtained by performing sieving using a metal mesh sieve specified in JIS Z8801-1: 2000 and calculating the average value of the weight distribution. The average thickness is an average value of values measured by a micrometer.

  The scaly particles are usually mixed at a ratio of 3 to 500 parts by weight (preferably 5 to 200 parts by weight) with respect to 100 parts by weight of the solid content of the resin component. If the mixing ratio of the scaly particles is within such a range, it is preferable in terms of improving the effect of the present invention.

  As the finish coating material, water-dispersible silica (f) having a particle diameter of 1 to 200 nm (hereinafter referred to as “component (f)”) and / or fluorine-containing fluorine having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group Those containing the compound (g) (hereinafter referred to as “component (g)”) can be used. In the present invention, by using a finish coating material containing such components, the stain resistance is enhanced, and the aesthetics can be maintained over a long period of time.

  The particles constituting the component (f) are compounds having a high hardness because silica is the main component, and having silanol groups on the particle surfaces. Such a component (f) greatly contributes to the effect of improving the stain resistance.

  The particle size of the component (f) is usually 1 to 200 nm, preferably 5 to 100 nm, more preferably 10 to 50 nm, and still more preferably 20 to 40 nm as the primary particle size. If the particle diameter of the component (f) is within such a range, it is preferable in terms of transparency of the coating film, contamination resistance, and the like. The particle diameter of the component (f) is a value measured by a light scattering method.

  The pH of the component (f) is preferably 5 or more and 12 or less, more preferably 6 or more and 10 or less, and further preferably 6 or more and 9 or less. The component (f) adjusted to such a pH can exhibit hydrophilicity due to abundant silanol groups on the particle surface, and greatly contributes to the improvement of stain resistance.

  The component (f) can be produced using, for example, sodium silicate or a silicate compound as a raw material. Among these, as silicate compounds, for example, tetramethoxysilane, tetraethoxysilane, tetra n-propoxysilane, tetraisopropoxysilane, tetra n-butoxysilane, tetraisobutoxysilane, tetrasec-butoxysilane, tetra-t-butoxy Examples thereof include silane, tetraphenoxysilane, and their condensates. In addition, alkoxysilane compounds other than the silicate compounds, alcohols, glycols, glycol ethers, fluorine alcohols, silane coupling agents, polyoxyalkylene group-containing compounds, and the like can also be used. A catalyst etc. can also be used at the time of manufacture. Further, after the production process or after production, the metal contained in the catalyst or the like can be removed by ion exchange treatment or the like.

  As the medium of component (f), water and / or a water-soluble solvent can be used. Examples of the water-soluble solvent include alcohols, glycols, glycol ethers and the like.

  The mixing ratio of the component (f) is preferably 0.1 to 50 parts by weight, more preferably 1 to 40 parts by weight, and still more preferably 3 to 30 parts by weight in terms of solids with respect to 100 parts by weight of the solids of the resin component. Parts by weight. Such a mixing ratio is preferable in terms of contamination resistance, crack prevention and the like.

  The component (g) is a fluorine-containing compound having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group. The polyfluoroalkyl group of component (g) is a group in which all or part of the hydrogen atoms bonded to the carbon atoms in the alkyl group having a linear, branched or cyclic skeleton are substituted with fluorine atoms. This polyfluoroalkyl group may have an etheric oxygen atom, a thioetheric sulfur atom or the like between carbon atoms in the polyfluoroalkyl group. The polyfluoroalkyl group may contain a halogen atom other than the fluorine atom. The number of carbon atoms in the polyfluoroalkyl group is preferably 1 or more, more preferably 3 or more, and even more preferably 6 or more. The upper limit of the number of carbon atoms in the polyfluoroalkyl group is preferably 40 or less, more preferably 20 or less. As the polyfluoroalkyl group of component (g), a perfluoroalkyl group is particularly preferred.

Examples of nonionic hydrophilic groups include polyalkylene oxide groups and amine oxide groups. Among these, as a polyalkylene oxide group, a polyethylene oxide group, a polypropylene oxide group, etc. are mentioned, for example, What mixed ethylene oxide group and a propylene oxide group can also be used. The number of repeating alkylene oxides is preferably 2 to 100.
Examples of amphoteric hydrophilic groups include nitrogen-containing amphoteric hydrophilic groups such as quaternary ammonium halogen salts and betaines. Among these, examples of the halogen in the quaternary ammonium halogen salt include a chlorine atom, a bromine atom, and an iodine atom. Betaine has a quaternary ammonium and an anion of an acid, and examples of the acid include carboxylic acid.

As (g) component in this invention, what has the said functional group together can be used. Such a component (g) is obtained by synthesizing a polyfluoroalkyl group-containing compound as an intermediate by, for example, an electrolytic fluorination method, a telomerization method, an oligomerization method, etc., and then adding a hydrophilic group to the intermediate. It can manufacture by introducing.
As the component (g), a 0.01% aqueous solution having a surface tension at 25 ° C. of 20 mN / m or less (more preferably 18 mN / m or less) is suitable.

  The component (g) is in a ratio of 0.01 to 10 parts by weight (more preferably 0.05 to 5 parts by weight, still more preferably 0.1 to 3 parts by weight) with respect to 100 parts by weight of the solid content of the resin component. It is desirable to mix.

  In the present invention, excellent contamination resistance can be exhibited by using the component (f) and the component (g) together. Furthermore, the drying property of the coating film can be improved, and it is effective for suppressing adhesion of contaminants in the initial stage of film formation. Although the specific mechanism of action in which such an effect is exhibited is not clear, the component (f) and the component (g) are orientated on the surface of the coating film during formation of the coating film, and the hardness, hydrophilicity, etc. of the coating film surface are It is estimated that it is effectively increasing.

  As the finish coating material, one containing fiber (h) (hereinafter referred to as “(h) component”) having a fiber length of 0.1 to 10 mm can be used. This (h) component has the effect of improving the coating workability of the finish coating material and stabilizing the coating film shape. Furthermore, the component (h) is also effective in terms of preventing cracking. In particular, when the component (f), the component (g), and the component (h) are combined, it is possible to achieve both prevention of contamination and stabilization of the coating film shape.

  Examples of the component (h) include pulp fiber, polyester fiber, polypropylene fiber, aramid fiber, vinylon fiber, polyethylene fiber, polyarylate fiber, PBO fiber (polyparaphenylene benzobisoxazole fiber), viscose rayon fiber, and nylon fiber. , Synthetic fibers such as acrylic fiber, vinyl chloride fiber, cellulose fiber, natural fibers such as kenaf, palm, cork, bamboo, hemp, wisteria, pineapple, banana, straw, rock wool, glass fiber, silica fiber, silica-alumina fiber Inorganic fibers such as carbon fiber and silicon carbide fiber can be used. In the present invention, polyester fiber, vinylon fiber, hemp, straw, glass fiber and the like are particularly preferable.

  The mixing ratio of the component (h) is preferably 0.01 to 30 parts by weight, more preferably 0.1 to 25 parts by weight, and further preferably 1 to 20 parts by weight with respect to 100 parts by weight of the solid content of the resin component. It is.

  In addition to the above components, the finish coating material may include, as necessary, color pigments, extender pigments, film-forming aids, plasticizers, antifreezing agents, antiseptics, antifungal agents, antibacterial agents, antifoaming agents, dispersants, Thickeners, leveling agents, wetting agents, pH adjusting agents, adsorbents, catalysts, crosslinking agents and the like can be mixed. The finish coating material can be produced by mixing these components uniformly by a conventional method, if necessary, in addition to the aforementioned components. Processing such as combining the (f) component and the (g) component in advance is not necessary.

[Method of forming heat insulation structure]
The heat insulating structure of the present invention has a base material layer (A), an inorganic heat insulating layer (B), an undercoat material layer (C), and a finishing material layer (D) from the indoor side to the outdoor side of the wall surface. is there. After such a heat insulation structure forms an inorganic heat insulation layer (B) with respect to a base material layer (A), and coats the surface with a primer (C) to form a primer layer (C) It can be obtained by applying a finishing coating material to form the finishing material layer (D). Construction of each material, drying curing, etc. are usually performed at room temperature.

Among these, the inorganic heat insulating layer (B) can be formed by applying a kneaded material obtained by appropriately adding water to a mixture of cement, lightweight aggregate, etc. on the base material layer (A) and curing it. This kneaded product can be applied two or more times. Moreover, it can also apply | coat, sticking waterproof paper, a lath, a mesh, etc. As the applicator, a cocoon is usually used.
Although the thickness of an inorganic heat insulation layer (B) should just be set suitably according to desired heat insulation performance etc., it is about 5-50 mm normally.

  In the present invention, the primer layer is coated on the surface of the inorganic heat insulating layer (B) to form the primer layer (C). In the application of the primer, a spray, a roller, a brush, a wrinkle or the like can be used. The thickness of the undercoat material layer is usually about 0.1 to 2 mm (preferably 0.2 to 1.5 mm).

The finishing material layer (D) may be formed by coating various finishing coating materials after drying the undercoat material. In painting, painting tools such as sprays, rollers, brushes and scissors can be used. The thickness of the finishing material layer (D) is usually about 0.5 to 10 mm.
A clear paint or the like can be separately applied to the surface of the finishing material layer (D) for the purpose of improving weather resistance, antifouling property, and the like.

In the present invention, the inorganic heat insulation layer (B) can be treated by applying a treatment liquid to the surface of the inorganic heat insulation layer (B) before the application of the primer (C). As such a treatment liquid,
(I) an aqueous resin (m) containing a carboxyl group-containing monomer as a monomer component in an amount of 5 to 50% by weight based on the total weight of the monomer and having a weight average molecular weight of 1000 to 100,000, and an epoxy group A treatment liquid containing the reactive compound (n) as an essential component (hereinafter referred to as “treatment liquid (i)”), or
(Ii) An epoxy group-containing synthetic resin emulsion (p) and a water-soluble silicate (q), and the solid content weight ratio of the synthetic resin emulsion (m) and the water-soluble silicate (n) is 90:10. -10: 90 treatment liquid (hereinafter referred to as "treatment liquid (ii)"),
Is preferred. Such a treatment liquid impregnates the surface layer of the inorganic heat insulation layer (B) and forms a thin film on the surface of the inorganic heat insulation layer (B). Thereby, in this invention, adhesiveness, crack prevention property, etc. can be improved further. Such effects include the effect that the treatment liquid increases the strength of the surface layer of the inorganic heat insulating layer (B), the effect of increasing the adhesive strength with the undercoat material layer (C), and further the undercoat from the inorganic heat insulating layer (B). This is considered to be achieved by blocking the alkali exudation to the material layer (C) and suppressing the deterioration of the undercoat material layer (C) over time.

When applying the treatment liquid, a spray, a roller, a brush, or the like may be used. The coating amount of the treatment liquid is usually about 0.05 to 0.5 kg / m ² (preferably about 0.1 to 0.3 kg / m ² ).
The timing for applying the treatment liquid may be before or after the inorganic heat insulating layer (B) is cured. Specifically, although it depends on the environmental conditions at the time of construction, it may be applied usually after about 7 to 30 days have passed after application of the lightweight mortar forming the inorganic heat insulating layer (B).
In the case where a sealing material or the like is placed on the wall surface serving as the base material, it is possible to use a plasticizer migration preventing primer or the like as the treatment liquid.

  By passing through such a process, an inorganic heat insulation layer (B) becomes a thing by which the outdoor side surface was processed with the said process liquid at least. Hereinafter, each processing solution will be described in detail.

[Treatment liquid (i)]
The treatment liquid (i) contains 5 to 50% by weight of a carboxyl group-containing monomer as a monomer component with respect to the total weight of the monomer, and an aqueous resin (m) having a weight average molecular weight of 1000 to 100,000. And a reactive compound (n) having an epoxy group as an essential component.
Among these, the aqueous resin (m) (hereinafter referred to as “component (m)”) is a monomer comprising a monomer containing a carboxyl group and other monomers copolymerizable with the monomer. It is a water-soluble and / or water-dispersible resin obtained by copolymerizing monomer groups.

The carboxyl group-containing monomer is a component that contributes to the crosslinking reactivity with the reactive compound (n) while imparting water solubility and / or water dispersibility to the component (m). Specific examples of the carboxyl group-containing monomer include (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, and the like, with (meth) acrylic acid being particularly preferred.
The ratio of the carboxyl group-containing monomer is 5 to 50% by weight, preferably 10 to 40% by weight, based on the total weight of the monomers. When the ratio of the carboxyl group-containing monomer is within such a range, a sufficient adhesion improving effect can be obtained by reaction with the reactive compound (n).

  Examples of other monomers copolymerizable with the carboxyl group-containing monomer include alkyl groups such as methyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and cyclohexyl (meth) acrylate. In addition to containing monomers, alkoxysilyl group-containing monomers, amino group-containing monomers, hydroxyl group-containing monomers, amide group-containing monomers, nitrile group-containing monomers, epoxy group-containing monomers, Examples thereof include carbonyl group-containing monomers and aromatic monomers.

  The weight average molecular weight of (m) component is 1000-100000 normally, Preferably it is 1500-50000, More preferably, it is 2000-20000. In addition, the weight average molecular weight is a value calculated by polystyrene measurement using gel permeation chromatography (GPC). Such a form of the component (m) is preferably a water-soluble resin.

The component (n) in the treatment liquid (i) is a reactive compound (n) having an epoxy group (hereinafter referred to as “(n) component”).
As the component (n), for example, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol polyglycidyl ether, diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, Examples include diglycerol polyglycidyl ether, polyhydroxyalkane polyglycidyl ether, and sorbitol polyglycidyl ether. In addition, a water-soluble resin or emulsion made of a polymer (homopolymer or copolymer) of an epoxy group-containing monomer can also be used. Such a compound has two or more epoxy groups in one molecule. Moreover, the compound which has an epoxy group and another functional group can also be used, for example, the compound etc. which have both an epoxy group and a hydrolyzable silyl group can be used. Examples of such compounds include γ-glycidoxypropyltrimexylsilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyltriisopropenyloxysilane, γ-glycidoxypropyltriiminooxysilane, β- (3,4-epoxycyclohexyl) ethylmethyldimethoxysilane, γ-isocyanatopropyltriisopropenyloxysilane Examples include adducts with glycidol.

  The mixing ratio of the component (m) and the component (n) is an equivalent ratio of carboxyl group / epoxy group, and is usually 100/20 to 100/500 (preferably 100/30 to 100/300, more preferably 100/50 to 100/200, more preferably 100/102 to 100/200).

The treatment liquid (i) contains at least water as a medium, but can also contain water and a water-soluble solvent as a medium. When water and a water-soluble solvent are included in the medium of the treatment liquid (i), the permeability to the inorganic heat insulating layer (B) is increased, and the effect of the present invention can be improved.
Examples of such water-soluble solvents include alcohol solvents, ether solvents, ester solvents, and the like. The solubility of the water-soluble solvent in water may be usually 10 g / 100 g or more, preferably 20 g / 100 g or more, more preferably ∞.

  In the treatment liquid (i), additives such as an antifoaming agent, a film-forming aid, an antifreezing agent, a thickener, an antifungal agent, and a surfactant can be mixed as necessary. The concentration of the active ingredient (total solid content of the component (m) and the component (n)) in the treatment liquid (i) is desirably about 5 to 50% by weight (preferably 10 to 40% by weight).

[Treatment liquid (ii)]
The treatment liquid (ii) contains an epoxy group-containing synthetic resin emulsion (p) (hereinafter referred to as “(p) component”) and a water-soluble silicate (q) (hereinafter referred to as “(q) component”) as essential components. Is.

As the component (p), a synthetic resin emulsion having an epoxy group in the emulsion particles can be used. Such a component (p) can be obtained by copolymerizing a monomer group including an epoxy group-containing monomer.
Examples of the epoxy group-containing monomer include glycidyl (meth) acrylate, diglycidyl fumarate, 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxyvinylcyclohexane, allyl glycidyl ether, and ε-caprolactone-modified glycidyl. (Meth) acrylate, (beta) -methylglycidyl (meth) acrylate, etc. are mentioned. The weight ratio of the epoxy group-containing monomer in the monomer group is usually 1 to 25% by weight, preferably 3 to 20% by weight.

  As the component (p), in addition to the above epoxy group, one containing one or more polar groups selected from a nitrile group, an amide group, and a carbonyl group is preferable. Such a polar group is desirable in terms of improving the effect of the present invention. Furthermore, in the present invention, since such a polar group is contained, the stability when the component (p) and the component (q) are mixed can be improved, so that the treatment liquid (ii) is a one-component type. It can also be handled. As a result, the efficiency of the processing work can be improved.

In addition to the epoxy group-containing monomer, the component (p) containing the polar group is one or more polar monomers selected from nitrile group-containing monomers, amide group-containing monomers, and carbonyl group-containing monomers. It can be obtained by copolymerizing a monomer group containing a monomer.
Among these, examples of the nitrile group-containing monomer include (meth) acrylonitrile, vinylidene cyanide, α-cyanoethyl (meth) acrylate, and the like.
Examples of the amide group-containing monomer include maleic acid amide, (meth) acrylamide, N-monoalkyl (meth) acrylamide, N, N-dialkyl (meth) acrylamide, 2- (dimethylamino) ethyl (methacrylate), N- [3- (dimethylamino) propyl] (meth) acrylamide, vinylamide and the like can be mentioned.
Examples of the carbonyl group-containing monomer include acrolein, diacetone (meth) acrylamide, vinyl methyl ketone, vinyl ethyl ketone, and vinyl butyl ketone.
The weight ratio of the polar monomer in the monomer group is usually 0.1 to 15% by weight, preferably 0.2 to 10% by weight.

(P) As a component, what uses the polymer of the monomer group containing the said monomer and (meth) acrylic-acid alkylester and / or an aromatic monomer as a resin component is suitable. Among these, examples of the (meth) acrylic acid alkyl ester include methyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and the like. The aromatic monomer is a compound having an aromatic ring and a polymerizable unsaturated double bond, and specific examples thereof include styrene, vinyl toluene, phenyl (meth) acrylate and the like. The total amount of these monomers ((meth) acrylic acid alkyl ester and aromatic monomer) is within a range where the weight ratio is 60 to 99% by weight (preferably 70 to 97% by weight) in the monomer group. You can set in. In the component (p), by using both such (meth) acrylic acid alkyl ester and aromatic monomer, performance such as adhesion can be enhanced.
In the component (p), monomers other than those described above can be used as long as the effects of the present invention are not impaired.

  Among the above monomers, the carboxyl group-containing monomer is desirably 3% by weight or less (preferably 1% by weight or less) in the monomer group. An embodiment that does not contain a carboxyl group-containing monomer is also suitable. Regarding the amino group-containing monomer, the weight ratio in the monomer group is desirably 3% by weight or less (preferably 1% by weight or less), and an embodiment that does not include the amino group-containing monomer is also suitable. By suppressing the use of such a monomer, the polarity of the epoxy group is utilized, and excellent adhesion and the like can be exhibited.

The component (p) can be produced by emulsion polymerization of a monomer group obtained by appropriately mixing the above monomers by a known method.
The component (p) is preferably an emulsifier using at least an anionic surfactant. Thereby, the average particle diameter of (p) component can be made comparatively small, and an impregnation reinforcement property etc. can be improved. Specific examples include the case where an anionic surfactant is used alone, or the case where an anionic surfactant and a nonionic surfactant are used in combination.

  (P) The average particle diameter of a component is 300 nm or less normally (preferably 20-120 nm, More preferably, it is 30-100 nm). Moreover, Tg of (p) component is -50-80 degreeC normally (preferably -40-60 degreeC).

Examples of the water-soluble silicate in the treatment liquid (ii) (q) (hereinafter referred to as "(q) components"), _{specifically, M 2 O · nSiO 2 (} M is .n showing an alkali metal 2-10. ) Can be used. As the alkali metal M, one or more selected from Li, Na, and K are preferable. Examples of such a component (q) include water-soluble lithium silicate, water-soluble sodium silicate, water-soluble potassium silicate and the like, among which lithium silicate is particularly preferable. N in said formula is 2-10 normally, Preferably it is 3-8. If n is in such a range, in addition to the above effects, advantageous effects can be obtained in terms of whiteness resistance, water resistance, and the like. Further, such (q) component is preferably in a completely water-soluble state.

  The weight ratio of the solid component (p) to the component (q) is usually 90:10 to 10:90, preferably 80:20 to 30:70, more preferably 75:25 to 50:50. If the solid content weight ratio of the component (p) and the component (q) is within such a range, it is preferable from the viewpoint of the effect of the present invention.

The treatment liquid (ii) preferably contains a nonionic surfactant (r) (hereinafter referred to as “component (r)”) having an HLB of 12 or more in addition to the above components. By mixing the component (r), the impregnation reinforcing property and the like can be further enhanced. Furthermore, the mixing stability of the (p) component and the (q) component can also be improved.
Specific examples of the component (r) include, for example, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, oxyethylene / oxypropylene block copolymer, and the like. Of these, those having an HLB of 12 or more can be used. (R) HLB of a component becomes like this. Preferably it is 12-17, More preferably, it is 13-15. HLB is an abbreviation for hydrophilic-lipophilic balance, and is a numerical representation of the hydrophilic / lipophilic strength ratio of an amphiphilic substance.
The component (r) may be mixed in a weight ratio of usually 1 to 30 parts by weight, preferably 2 to 20 parts by weight, based on 100 parts by weight of the solid content of the component (p).

  In the treatment liquid (ii), additives such as an antifoaming agent, a film-forming aid, an antifreezing agent, a thickening agent, an antifungal agent, and a water-soluble solvent can be mixed as necessary. The concentration of the active ingredient (total solid content of the component (p) and the component (q)) in the treatment liquid (ii) is desirably about 5 to 50% by weight (preferably 10 to 40% by weight).

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

(1) Manufacture of undercoat materials The following raw materials were used in the manufacture of undercoat materials.
Resin 1: Light stabilizer composite acrylic resin emulsion (glass transition temperature: −10 ° C., resin solid content: 50% by weight, light stabilizer: 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine (resin 0.5% by weight in ingredients))
Resin 2: Light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: −12 ° C., resin solid content: 50% by weight, light stabilizer: 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine ( 0.5% by weight in the resin component))
Resin 3: light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: 6 ° C., resin solid content: 50% by weight, light stabilizer: 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine (resin 0.5% by weight in ingredients))
Resin 4: Light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: −18 ° C., resin solid content: 50% by weight, light stabilizer: 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine ( 0.5% by weight in the resin component))
Resin 5: acrylic resin emulsion (glass transition temperature: −10 ° C., resin solid content: 50% by weight)
Inorganic powder 1: heavy calcium carbonate (average particle size 4 μm, specific gravity 2.6)
Inorganic powder 2: Titanium oxide (average particle size 0.3 μm, specific gravity 4.2)
-Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Cellulose-based thickener-Antifoaming agent: Silicone-based antifoaming agent

(Primer 1)
200 parts by weight of resin 1 is charged in a container, 280 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 20 parts by weight of a film-forming aid, 8 parts by weight of thickener, defoaming Undercoat material 1 (pigment volume concentration 53%) was produced by mixing 2 parts by weight of the agent and stirring uniformly in a conventional manner.

(Prime material 2)
200 parts by weight of resin 2 is charged into a container, 280 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 20 parts by weight of a film-forming aid, 8 parts by weight of thickener, defoaming Undercoat material 2 (pigment volume concentration 53%) was produced by mixing 2 parts by weight of the agent and stirring uniformly in a conventional manner.

(Primer 3)
200 parts by weight of resin 3 is charged in a container, 178 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 20 parts by weight of a film-forming aid, 10 parts by weight of thickener, defoaming Undercoat material 3 (pigment volume concentration 42%) was produced by mixing 2 parts by weight of the agent and stirring uniformly by a conventional method.

(Priming material 4)
200 parts by weight of resin 4 is placed in a container, 450 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 20 parts by weight of a film-forming aid, 6 parts by weight of thickener, defoaming Undercoat material 4 (pigment volume concentration 64%) was produced by mixing 2 parts by weight of the agent and stirring uniformly by a conventional method.

(Primer 5)
200 parts by weight of resin 2 is charged in a container, 1100 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 24 parts by weight of a film-forming aid, 4 parts by weight of thickener, defoaming Undercoat material 5 (pigment volume concentration 81%) was produced by mixing 2 parts by weight of the agent and stirring uniformly by a conventional method.

(Priming material 6)
200 parts by weight of resin 5 is placed in a container, 280 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 20 parts by weight of a film-forming aid, 8 parts by weight of thickener, defoaming Undercoat material 6 (pigment volume concentration 53%) was produced by mixing 2 parts by weight of the agent and stirring uniformly by a conventional method.

(Priming material 7)
200 parts by weight of resin 5 is charged in a container, 1100 parts by weight of inorganic powder 1, 16 parts by weight of inorganic powder 2, 24 parts by weight of a film-forming aid, 4 parts by weight of a thickener, defoaming Undercoat material 7 (pigment volume concentration 81%) was produced by mixing 2 parts by weight of the agent and stirring uniformly by a conventional method.

(2) Production of finish coating material The following raw materials were used in the production of the finish coating material.
Resin 6: Acrylic silicon resin emulsion (glass transition temperature: 16 ° C., resin solid content: 50% by weight)
Resin 7: Light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: 14 ° C., resin solid content: 50% by weight, light stabilizer: bis (1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate (0.8% by weight in resin component))
Resin 8: Light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: −6 ° C., resin solid content: 50% by weight, light stabilizer: bis (1,2,2,6,6-pentamethyl-4-piperidyl ) Sebacate (0.8% by weight in resin component))
Resin 9: Light stabilizer composite acrylic silicon resin emulsion (glass transition temperature: 28 ° C., resin solid content: 50% by weight, light stabilizer: bis (1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate (0.8% by weight in resin component))
-Granular aggregate: colored quartz sand (a mixture of brown quartz sand, red quartz sand and pale yellow quartz sand, average particle size 0.08 to 0.2 mm)
Scale-like particles: Mica-based particles (average particle diameter 1.0 mm, average thickness 40 μm)
Water-dispersible silica: silica sol (pH 7.6, solid content 20% by weight, average primary particle size 27 nm)
Fluorine-containing compound 1: perfluoroalkyl betaine (surface tension of 16.0% aqueous solution 16.0 mN / m (25 ° C.))
Fluorine-containing compound 2: perfluoroalkylethylene oxide adduct (surface tension of 17.5% aqueous solution 17.5 mN / m (25 ° C.))
-Fiber: Vinylon fiber having a fiber length of 0.8 mm-Film-forming auxiliary: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Cellulosic thickener-Antifoaming agent: Silicone defoamer

(Finish coating material 1)
200 parts by weight of resin 6 is charged in a container, 420 parts by weight of granular aggregate, 9 parts by weight of a film-forming aid, 24 parts by weight of a thickener, and 2 parts by weight of an antifoaming agent are mixed in a conventional manner. The finish coating material 1 was manufactured by stirring uniformly.

(Finish coating material 2)
200 parts by weight of resin 6 is charged in a container, 420 parts by weight of granular aggregate, 65 parts by weight of scaly particles, 9 parts by weight of a film-forming aid, 24 parts by weight of a thickener, and an antifoaming agent. Finish coating material 2 was manufactured by mixing 2 parts by weight and stirring uniformly by a conventional method.

(Finish coating 3)
200 parts by weight of resin 8 is charged in a container, 760 parts by weight of granular aggregate, 32 parts by weight of scaly particles, 9 parts by weight of a film-forming aid, 18 parts by weight of a thickener, and an antifoaming agent. Finish coating material 3 was manufactured by mixing 2 parts by weight and stirring uniformly by a conventional method.

(Finish coating material 4)
200 parts by weight of resin 9 is charged in a container, 310 parts by weight of granular aggregate, 150 parts by weight of scaly particles, 9 parts by weight of a film-forming aid, 30 parts by weight of a thickener, and an antifoaming agent. A finish coating material 4 was produced by mixing 2 parts by weight and stirring uniformly by a conventional method.

(Finish coating 5)
200 parts by weight of resin 7 is charged into a container, and then 420 parts by weight of granular aggregate, 9 parts by weight of a film-forming aid, 24 parts by weight of a thickener, and 2 parts by weight of an antifoaming agent are mixed together. Finishing coating material 5 was manufactured by stirring uniformly.

(Finish coating 6)
200 parts by weight of resin 7 is charged in a container, 420 parts by weight of granular aggregate, 10 parts by weight of water-dispersible silica, 9 parts by weight of a film-forming aid, 28 parts by weight of a thickener, and an antifoaming agent 2 parts by weight was mixed, and the finish coating material 6 was produced by stirring uniformly by a conventional method.

(Finish coating material 7)
200 parts by weight of resin 7 is charged in a container, 420 parts by weight of granular aggregate, 0.5 parts by weight of fluorine-containing compound 1, 9 parts by weight of a film-forming aid, 24 parts by weight of thickener, Finish coating material 7 was manufactured by mixing 2 parts by weight of a foaming agent and stirring uniformly by a conventional method.

(Finish coating material 8)
200 parts by weight of resin 7 is charged in a container, 420 parts by weight of granular aggregate, 10 parts by weight of water-dispersible silica, 0.5 parts by weight of fluorine-containing compound 1, and 9 parts by weight of a film-forming aid, A finish coating material 8 was produced by mixing 28 parts by weight of a thickener and 2 parts by weight of an antifoaming agent and stirring uniformly by a conventional method.

(Finish coating material 9)
200 parts by weight of resin 7 is charged in a container, 420 parts by weight of granular aggregate, 10 parts by weight of water-dispersible silica, 0.5 parts by weight of fluorine-containing compound 2, and 9 parts by weight of a film-forming aid, A finish coating material 9 was produced by mixing 28 parts by weight of a thickener and 2 parts by weight of an antifoaming agent and stirring uniformly by a conventional method.

(Finish coating material 10)
200 parts by weight of resin 7 is charged in a container, 420 parts by weight of granular aggregate, 10 parts by weight of water-dispersible silica, 0.5 parts by weight of fluorine-containing compound 2, 9 parts by weight of fibers, and a film-forming aid. 9 parts by weight, 28 parts by weight of thickener and 2 parts by weight of antifoaming agent were mixed, and the finish coating material 10 was produced by stirring uniformly in a conventional manner.

(3) Production of treatment liquid The following raw materials were used in the production of the treatment liquid.
Resin 10: Water-soluble acrylic resin (solid content: 50% by weight, weight average molecular weight: 5000, carboxyl group-containing monomer: methacrylic acid (ratio in resin component: 25% by weight))
Resin 11: Synthetic resin emulsion (styrene- (2-ethylhexyl acrylate) -glycidyl methacrylate-acrylonitrile copolymer (weight ratio = 55: 28: 14: 3), solid content: 40% by weight, average particle diameter 83 nm)
Water-soluble solvent: ethylene glycol monoalkyl ether (water solubility: ∞)
Water-soluble silicate: Lithium silicate aqueous solution (Molar ratio of Li ₂ O and SiO ₂ 1: 3.5, solid content 24% by weight)
-Surfactant: Nonionic surfactant (polyoxyethylene alkyl ether, HLB 14.0)
Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate Compound 1: Polyhydroxyalkane polyglycidyl ether Compound 2: γ-glycidoxypropyltrimexylsilane

(Processing liquid 1)
Resin 10 was placed in a container, and water and a water-soluble solvent were added thereto, so that the weight ratio of water to the water-soluble solvent was 70:30. Treatment liquid 1 (concentration of active ingredient: 25% by weight) prepared by mixing this preparation liquid and compound 1 at the time of coating so that the equivalent ratio of carboxyl group and epoxy group (carboxyl group / epoxy group) is 100/110 ).

(Processing liquid 2)
Resin 10 was placed in a container, and water and a water-soluble solvent were added thereto, so that the weight ratio of water to the water-soluble solvent was 70:30. Treatment liquid 2 (concentration of active ingredient: 25% by weight) prepared by mixing this preparation liquid and compound 2 at the time of coating so that the equivalent ratio of carboxyl group to epoxy group (carboxyl group / epoxy group) is 100/100 ).

(Processing liquid 3)
Resin 10 was charged in a container, and water was added thereto to adjust the concentration (weight ratio of water and water-soluble solvent = 100: 0). Treatment liquid 3 (concentration of active ingredient: 25% by weight) prepared by mixing this preparation liquid and compound 1 at the time of coating so that the equivalent ratio of carboxyl group to epoxy group (carboxyl group / epoxy group) is 100/110 ).

(Processing liquid 4)
250 parts by weight of resin 11 is charged in a container, 180 parts by weight of water-soluble silicate, 10 parts by weight of a surfactant, 28 parts by weight of a film-forming aid, and 460 parts by weight of water are mixed in a conventional manner. By uniformly stirring, the treatment liquid 4 (weight ratio of solid content of synthetic resin emulsion and water-soluble silicate = 70: 30) was produced.

(Processing liquid 5)
250 parts by weight of resin 11 is charged in a container, 180 parts by weight of a water-soluble silicate, 28 parts by weight of a film-forming aid, and 460 parts by weight of water are mixed into the container, and uniformly treated by a conventional method. 5 (solid content weight ratio of synthetic resin emulsion and water-soluble silicate = 70: 30) was produced.

(Processing liquid 6)
293 parts by weight of resin 11 is charged in a container, and 107 parts by weight of water-soluble silicate, 10 parts by weight of a surfactant, 28 parts by weight of a film-forming aid, and 490 parts by weight of water are mixed in a conventional manner. By uniformly stirring, the treatment liquid 6 (solid content weight ratio of synthetic resin emulsion and water-soluble silicate = 82: 18) was produced.

(Test Example 1)
・ Followability test A cut base was used as a test base material in a lateral center portion of a cement-based inorganic molded plate (length 150 × width 70 × thickness 6 mm). Treatment liquid 1 was applied to the test substrate at a coating amount of 0.15 kg / m ² using a wool roller. After 24 hours, the undercoat material 1 is spray-coated so that the dry thickness is about 0.5 mm, and then after 24 hours, the finish coating material 2 is spray-coated so that the dry thickness is about 2 mm, for 14 days. Cured. The test plates were all prepared and cured in standard conditions (temperature 23 ° C., relative humidity 50%). The upper and lower end portions 20 mm were not coated.
The test plate obtained by the above method was subjected to accelerated exposure for 5000 hours using a sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.), and then evaluated for followability using a tensile tester. The evaluation was “A” when no abnormality was observed when the test substrate was pulled 1 mm, “B” when no abnormality was observed when the test substrate was pulled 0.5 mm, and the test substrate. The case where cracks were observed when the wire was pulled 0.5 mm was designated as “C”, and the case where cracks were observed after accelerated exposure was designated as “D”. The test results are shown in Table 1.

・ Adhesion test On one side of a slate plate (thickness 6 mm), a slurry obtained by kneading water into a lightweight mortar containing Portland cement and pearlite as the main component is coated with water to form a lightweight mortar layer with a thickness of 20 mm. It was.
After 28 days from the application of the lightweight mortar, the treatment liquid 1 was applied to the surface of the lightweight mortar layer at a coating amount of 0.15 kg / m ² using a wool roller. After 24 hours, the undercoat material 1 is spray-coated so that the dry thickness is about 0.5 mm, and then after 24 hours, the finish coating material 2 is spray-coated so that the dry thickness is about 2 mm, for 14 days. Cured. The test plates were all prepared and cured in standard conditions (temperature 23 ° C., relative humidity 50%).
The test plate obtained by the above method was immersed in a saturated calcium hydroxide aqueous solution (23 ° C.) for 10 days, and then the adhesion strength was measured using a tensile tester. In this test, the value of the adhesion strength in a test plate (Test Example 9) coated with the finish coating material without using the treatment liquid was used as a reference value.
The evaluation of the adhesion test is performed by calculating the magnification of the adhesion strength of the test plate with respect to the reference value. “A” is 2.0 times or more of the reference value, and “1.5” or more and less than 2.0 times is “ “B”, 1.1 times or more and less than 1.5 times, “C”, and less than 1.1 times “D”. The test results are shown in Table 1.

(Test Examples 2 to 22)
A test body was prepared in the same manner as in Test Example 1 except that the materials shown in Table 1 were used as the treatment liquid, the primer, and the finish coating material, and each test was performed. The test results are shown in Table 1.
In Test Examples 1 to 19, good results were obtained in the followability test. About Test Examples 1-18, the favorable result was shown also in the adhesiveness test.

  For Test Example 2 and Test Examples 11 to 16, the following tests were performed.

・ Contamination resistance test A test plate was prepared in the same manner as the above “adhesion test”, and the obtained test plate was placed under the cage of a plastic corrugated plate and exposed outdoors for one month. Contamination was confirmed. The evaluation was performed in four stages (A>B>C> D) where “A” is the least contaminated grade (A>B>C> D). The test results are shown in Table 2.

Claims (2)

It is a heat insulating structure that constitutes the outer wall surface of the building, from the indoor side to the outdoor side of the wall surface,
Base material layer (A),
An inorganic heat insulating layer (B) formed of a lightweight mortar containing cement and lightweight aggregate as essential components,
A pigment volume concentration of the inorganic powder including a resin component obtained by combining a synthetic resin having a glass transition temperature of −60 to 40 ° C., a light stabilizer and / or an ultraviolet absorber, and an inorganic powder. An undercoat layer (C) formed by an undercoat material having a content of 30 to 80%,
Finishing material layer (D) formed by a finishing coating material containing 100 to 2000 parts by weight of granular aggregate with respect to 100 parts by weight of resin component capable of forming a transparent film
A heat insulating structure characterized by comprising: The finishing material layer (D)
Scale-like particles having a granular aggregate of 100 to 2000 parts by weight and a ratio of average particle diameter to average thickness (average particle diameter / average thickness) of 2/1 or more with respect to 100 parts by weight of the resin component capable of forming a transparent film Finishing material layer (D) formed by a finishing coating material containing 3 to 500 parts by weight of
The heat insulating structure according to claim 1, wherein: