JP2001187861A - Coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating having slaked lime as the major component which excels in opacifying power with a small coating amount, and a coated product having been coated with the same. SOLUTION: The coating composition for buildings comprises slaked lime, a vinyl resin, titanium oxide, and water (a) at a compounding amount of the slaked lime of 30-80 wt.% (in terms of solids), (b) the vinyl resin being a polymer comprising, as the monomer component, at least one member selected from the group consisting of vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, vinyl versatate, and vinyl benzoate in a compounding amount of the resin of 10-70 pts.wt. (in terms of solids) based on 100 pts.wt. slaked lime, and (c) at a compounding ratio of the titanium oxide of 2-30 pts.wt. based on 100 pts.wt. slaked lime, and a coated product is prepared with the use of the coating composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to various types of buildings.
The present invention relates to a water-based paint suitable for decorative painting of an interior or exterior such as an outer wall or a ceiling. More specifically, the present invention forms a coating film having a calm matte texture peculiar to plaster and a humidity control function, while satisfying various coating properties and coating film properties required as an aqueous coating material. To an architectural coating composition. Furthermore, the present invention relates to a coated product obtained by applying the coating composition, particularly a building material.

[0002]

2. Description of the Related Art In addition to the calm and profound finish, plaster has excellent functions such as humidity control (moisture absorption and moisture release), anti-condensation and anti-mold properties. It is a building material that has long been used as a painted wall material.

However, plastering requires plastering work that requires skill, and the finish is likely to vary due to the skill of the worker. In addition, the necessity of multiple repetitions (painting and rubbing) makes the construction efficient. However, there is a disadvantage that the construction period is long and the construction cost is high.

For this reason, in order to finish the interior wall of a recent residential building, many finishing methods such as PVC cloth application and synthetic resin emulsion painting have been adopted, but recently, chemical sensitivity, sick house syndrome, etc. The harm of such chemical substances has been regarded as a problem, and natural materials such as the above plaster without such harm have been reviewed again.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aqueous coating composition containing slaked lime as a main component of a plaster wall material. More specifically, the present invention has the performance as a water-based paint, the coating film formed has a texture unique to the stucco wall and coating film properties including alkali resistance and washing resistance, as well as humidity control properties, It is an object of the present invention to provide a coating composition which can be suitably used as an architectural coating by having excellent coating functions such as mold resistance and fire resistance.

Further, the present invention relates to a painted product having a coating film formed from the above-mentioned coating composition, specifically, various building materials (board, panel, cloth, etc.) for interior and exterior used as inner / outer wall materials and ceiling materials. ). The coated article can have useful functions such as humidity control and dew condensation prevention based on the coating function of the coating composition.

[0007]

SUMMARY OF THE INVENTION The present inventor has paid attention to the excellent cosmetic properties and functions of stucco, and has the same quality and usability as conventional emulsion paints while having the texture (appearance) and functions peculiar to stucco. After a thorough study with the aim of developing a water-based paint that has a stucco, storage stability without impairing the texture and function of the stucco by blending the specific vinyl resin and water with slaked lime, the main component of the stucco, It has been found that an aqueous coating composition having excellent properties and coating workability can be prepared. In addition, a coating film formed from such a coating composition exhibits sufficient adhesion and toughness even if it does not necessarily contain fiber material such as susa, which has conventionally been essential for a plaster wall material, and has excellent film-forming properties. Conversely, by not containing fiber material, the leveling property is improved and a thin coating film can be formed with a smaller application amount, and the coating film can be easily and beautifully made by a conventional coating work such as brush, roller, spray etc. I found that I could finish it.

Further, the present inventor has further studied based on this finding. As a result of adding a specific amount of titanium oxide as a pigment to the above-mentioned coating composition, the present coating composition has extremely good functions such as humidity control. It is possible to conceal the construction surface with a small amount of application, and found that it is excellent in film formability, and from these, according to the coating composition of the present invention, at low cost and with less labor, there is a calm peculiar to plaster. It was confirmed that a coating film having a solid texture and exhibiting functions such as humidity control and dew condensation prevention could be formed.

The present invention has been developed based on such knowledge.

That is, the present invention provides the following 1. ~ 9. The coating compositions are as follows: A paint composition containing slaked lime, a vinyl resin, titanium oxide and water, wherein (a) the blending ratio of slaked lime is 30 to
80% by weight (solid basis), (b) the vinyl resin is selected from the group consisting of vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, versatic acid vinyl and vinyl benzoate A polymer containing at least one of the above as a monomer component, wherein the compounding ratio of the resin to 100 parts by weight of slaked lime is 10 to 70 parts by weight (solid basis), and (c) the compounding of titanium oxide to 100 parts by weight of slaked lime. An architectural coating composition having a ratio of 2 to 30 parts by weight (solid basis). 2. 2. The architectural coating composition according to 1, wherein the vinyl resin is a polymer containing at least one selected from the group consisting of vinyl acetate, vinyl chloride and vinylidene chloride as a monomer component. 3. 3. The architectural coating composition according to 1 or 2, wherein the mixing ratio of titanium oxide to 100 parts by weight of slaked lime is 8 to 15 parts by weight (solid basis). 4. 4. The architectural coating composition according to any one of 1 to 3, wherein a mixing ratio of the vinyl resin to 100 parts by weight of slaked lime is 25 to 35 parts by weight (solid basis). 5. 5. The architectural coating composition according to any one of 1 to 4, which contains titanium oxide in a ratio of 2 to 10% by weight (in terms of solid weight) per solid content. 6. 6. The architectural coating composition according to any one of 1 to 5, which does not contain a fiber material. 7. 1 to 6 in which the hiding power of the dried coating film is 500 μm or less
The architectural coating composition according to any one of the above. 8. The architectural coating composition according to any one of claims 1 to 7, wherein the viscosity is 300 to 3000 centipoise at room temperature. 9. (1) The state of the coating liquid or its dried coating film in the container,
(2) Painting workability, (3) Low temperature stability, (4) Appearance of coating film, (5) Alkali resistance, (6) Washing resistance, (7) Concealment ratio is JIS K5663-19
The architectural coating composition according to any one of claims 1 to 8, which satisfies the properties of at least two kinds of paints specified in 95.

[0011] The present invention also relates to a painted product having a coating film formed from the above-mentioned architectural coating composition, and more specifically to a building material for interior and exterior used for inner / outer wall materials and ceiling materials. Furthermore, the present invention relates to a method for applying the above-mentioned architectural coating composition and a method for constructing the interior and exterior of a building using the above-mentioned building material. The present invention also relates to a method for restoring the interior and exterior surfaces of a building using the coating composition.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Paint Composition The paint composition of the present invention is an aqueous paint composition containing slaked lime, vinyl resin, titanium oxide and water as main components.

The slaked lime used in the present invention is not particularly limited as long as it is generally used as a component of a plaster wall material. For example, various types of calcium hydroxide can be used regardless of hydraulic or air-hardness, including industrial slaked lime. Slaked lime that has been subjected to a treatment such as coloring can also be used.

The mixing ratio of slaked lime in the coating composition is not particularly limited as long as the coating composition of the present invention satisfies the desired performance in storage stability, coating workability, film formability and the like. More specifically, it can be appropriately selected from a range in which the blending ratio per 100% by weight of the solid content of the coating composition is 30 to 80% by weight. Preferably 40-
It is 80% by weight, more preferably 50-80% by weight, even more preferably 60-75% by weight.

The vinyl resin used in the present invention is:
Vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, V acid (versatic aci
d) A polymer containing at least one selected from the group consisting of vinyl and vinyl benzoate as a monomer component. Specifically, various homopolymers composed of vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, vinyl V-acid (versatic acid) vinyl or vinyl benzoate as a monomer component, or those listed above Copolymers composed of any combination of at least two types of monomer components, and copolymers composed of the above-mentioned monomer components and other monomer components than the above-mentioned ones can be exemplified.

The other monomer component is not particularly limited as long as it forms a copolymer with the above-mentioned monomer component. (Meth) acrylic acid, (meth) acrylic ester, (meth) acrylonitrile, (Meth) acrylic acid amide, maleic acid or its ester, fumaric acid or its ester, ethylene and the like. These monomer components are vinyl acetate, vinyl chloride,
Vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, versatic acid vinyl or vinyl benzoate may be used alone or in any combination of two or more. In addition, versatic acid vinyl is an alkyl-substituted product of trimethylacetic acid (pivalic acid). Although the number of carbon atoms of the alkyl group is not limited, about 9 to 13 carbon atoms can be exemplified. Specific V acid (versatic acid) vinyl, V ₉ acid vinyl,
Vinyl V ₁₀ acid, vinyl V _{9, 11} acid, V ₁₃ acid vinyl and the like.

Specific examples of the copolymer include vinyl chloride / ethylene copolymer, vinyl chloride / vinyl acetate copolymer, vinyl chloride / vinylidene chloride copolymer, vinyl chloride / veova copolymer, and vinyl chloride / vinyl chloride copolymer. Acrylic copolymer; vinylidene chloride / acrylic copolymer; vinyl acetate / ethylene copolymer, vinyl acetate / veova copolymer, vinyl acetate / acrylic copolymer, vinyl acetate / fumaric acid ester (for example, vinyl acetate / fumaric acid) Dibutyl), vinyl acetate / maleic acid ester (eg, vinyl acetate / dibutyl maleate); and Veova / ethylene and Veova / acrylic copolymers. In the above, acrylic includes (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylonitrile or (meth) acrylic amide.

The (meth) acrylic acid ester specifically includes methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid Acrylic acid having 1 to 18 carbon atoms in an alkyl group such as t-butyl, hexyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, palmityl acrylate or cyclohexyl acrylate Alkyl esters; methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate,
T-butyl methacrylate, hexyl methacrylate,
The alkyl group such as n-octyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, palmityl methacrylate and cyclohexyl methacrylate has 1 to 18 carbon atoms.
Alkyl methacrylate to the extent of (meth) acrylic acid side chains such as hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate, etc. Alkyl esters having a hydroxyl group; such as methoxybutyl acrylate, methoxybutyl methacrylate, methoxyethyl acrylate, methoxyethyl methacrylate, ethoxybutyl acrylate, and ethoxybutyl methacrylate; Alkyl esters of (meth) acrylic acid such as allyl acrylate and allyl methacrylate; allyloxyethyl acrylate and allyloxyethyl methacrylate Alkenyloxyalkyl esters of (meth) acrylic acid; glycidyl acrylate, glycidyl methacrylate, and alkyl esters having an epoxy group in the side chain of acrylic acid such as methyl glycidyl acrylate and methyl glycidyl methacrylate; diethylamino acrylate Mono- or di-alkylaminoalkyl esters of (meth) acrylic acid such as ethyl, diethylaminoethyl methacrylate, methylaminoethyl acrylate and methylaminoethyl methacrylate; having a silane group or an alkoxysilane group as a side chain (meth)
An acrylate ester etc. can be mentioned.

The vinyl resin used in the present invention is preferably a polymer (homopolymer or copolymer) containing at least one selected from the group consisting of vinyl acetate, vinyl chloride and vinylidene chloride as a monomer component. Specifically, although not limited, polyvinyl acetate, polyvinyl chloride, vinyl chloride / ethylene copolymer,
Vinyl chloride / vinyl acetate copolymer, vinyl chloride / vinylidene chloride copolymer, acrylonitrile / vinylidene chloride copolymer, vinyl acetate / ethylene copolymer, vinyl acetate / veova copolymer, vinyl acetate / acrylic copolymer ( For example, vinyl acetate / acrylonitrile copolymer, vinyl acetate / acrylate copolymer) and the like are exemplified.

The vinyl resin used in the present invention includes a modified vinyl resin such as an acrylic-modified vinyl acetate / vinyl chloride copolymer.

The type, amount and degree of polymerization of the monomers used for these vinyl resins are determined by the use temperature (curing temperature) of the obtained coating composition of the present invention and the phase of other components of the coating composition such as slaked lime. It is appropriately selected in consideration of the solubility and the like, for example, using the glass transition point (Tg) of the obtained resin as a guide. For example, the vinyl resin used when the coating composition is prepared as a room temperature drying type coating is not particularly limited, but it is preferable to select a resin having a glass transition point of about -100 to + 30 ° C. Preferably the glass transition point is -40 to + 20 ° C, more preferably-
A temperature of 20 to 10 ° C. can be selected. Further, the paint composition is forcedly dried (for example, drying temperature: 50).
To 200 ° C.), the vinyl resin used is not particularly limited, but has a glass transition point of +3.
It is preferable to select one that is in the range of 0 to 100 ° C.

When the coating composition of the present invention is prepared in a mode that is easily used for on-site coating work, the coating composition is preferably a room temperature-drying coating material that can be cured at room temperature to room temperature. The vinyl resin used in this case is also preferably a room temperature drying type resin.

The form of the vinyl resin used is not particularly limited, and may be any of an aqueous emulsion or dispersion form such as an emulsion or an aqueous polymer dispersion, a powder form such as a re-emulsified powder resin, and a liquid form such as a liquid polymer. It may be an aspect. Preferably, it is in the form of an emulsion. When blended as an emulsion, the emulsion may be obtained by emulsion polymerization of a monomer having a polymerizable unsaturated double bond, or may be obtained by dispersing a previously synthesized resin in an aqueous dispersion medium using a dispersant. And those prepared by dispersing a powder type polymer in water or the like.

The vinyl resin used in the present invention increases the adhesive strength between slaked lime in the coating composition, the adhesive strength between slaked lime and the additives described below, and the adhesive strength between the coating composition and the object to be coated. In addition, it has the function of preventing cracks in the coating layer (coating layer) formed on the surface of the object to be coated and improving the toughness of the building material.

The mixing ratio of the vinyl resin depends on the performance required as an aqueous paint, such as storage stability, coating workability and film formability, and preferably the properties of at least two paints specified in JIS K 5663-1995 described later. Is not particularly limited as long as it satisfies the condition, and can be appropriately determined according to the type of the vinyl resin to be used. Specifically, slaked lime 10
The mixing ratio of the vinyl resin to 0 parts by weight is usually 1
It can be selected and adjusted from the range of 0 to 70 parts by weight (solid basis). It is preferably 10 to 50 parts by weight, more preferably 20 to 40 parts by weight, and still more preferably 25 to 35 parts by weight.

In the present invention, in addition to the slaked lime and the vinyl resin, pigments (white pigment, colored pigment, extender pigment) and various additives can be further blended. Such additives include, for example, pigment dispersants, wetting agents, defoamers, thickeners, freeze-thaw stabilizers, film-forming aids such as film-forming aids and rheology modifiers, as well as inorganic materials (fine bones). Inorganic fillers such as materials), surfactants, plasticizers, water reducing agents, fluidizing agents, preservatives, antibacterial agents and the like.

The pigment is not particularly limited as long as it is used for an aqueous paint, and any pigment can be employed, but an inorganic pigment is preferred. Examples of such inorganic pigments include white pigments such as titanium oxide, zinc white, lithopone, zinc sulfide, and antimony white; black pigments such as carbon black and iron oxide: cadmium red, red iron oxide, molybdenum red, and lead red. Red pigment: Yellow lead (chrome yellow), titanium yellow, cadmium yellow, yellow iron oxide, tan, antimony yellow, vanadium tin yellow, vanadium zirconium yellow Yellow pigment: chromium oxide, viridian, titanium cobalt green, cobalt green, cobalt chrome Green pigments such as green and Victoria green: various colored pigments such as blue pigments such as ultramarine blue, navy blue, cobalt blue, cerulean blue, cobalt silica blue, cobalt zinc silica blue; talc, kaolin clay, aluminum hydroxide, and carbonic acid Calcium (heavy calcium carbonate, precipitated calcium carbonate), bentonite, barium sulfate (precipitated barium sulfate, barite powder) can be exemplified an extender pigment such as white carbon, silica. The proportion of the pigment blended in the coating composition of the present invention is not particularly limited, and can be appropriately selected and adjusted according to the desired hiding power and color (brightness, chromaticity, saturation).

Preferred among the pigments are white pigments,
Among them, titanium oxide can be mentioned. In general, rutile type titanium oxide has better light resistance and hiding power than anatase type.However, in the present invention, titanium oxide is not particularly limited, and any of rutile type, anatase type and brookite type is used. can do. The particle size and shape are not particularly limited, and can be appropriately selected from commercially available products according to the purpose. Generally, as the titanium oxide, those having a substantially spherical shape having a particle size of 0.1 to 0.5 μm, ultrafine particles having a particle size of 0.01 to 0.05 μm, and plate-like titanium oxide for absorbing ultraviolet light are known.

From the viewpoint of the hiding power, it is preferable to use rutile titanium oxide, and titanium oxide having a particle size of 0.1 to 0.3 μm can be suitably used. Further, in order to improve the hiding power, an extender pigment can be further used in combination, and calcium carbonate and talc can be suitably exemplified as such extender pigments.

When titanium oxide is compounded, the compounding ratio is 2 to 30 parts by weight, preferably 4 to 20 parts by weight, more preferably 8 to 10 parts by weight based on 100 parts by weight of slaked lime.
The range is 15 parts by weight, more preferably 8 to 12 parts by weight.

The coating composition of the present invention, which is prepared by blending titanium oxide in the above ratio in a coating composition containing slaked lime as a main component, can cover the surface to be coated with a smaller coating amount, and The coating film formed by such a small amount of paint has a desired appearance and physical properties even though it is a thin coating film, and can exhibit functions such as humidity control properties and accompanying dew condensation prevention properties.

Such a coating film can be achieved by using at least 100 g, preferably about 300 g, of the coating composition of the present invention in terms of solid weight per m ² . The coating function such as humidity control improves as the coating amount of the coating composition is increased. Therefore, in view of such a function, the present invention does not limit the upper limit of the coating amount of the coating composition. However, in consideration of the coating film formability, cost, coating workability, and the like, the coating composition of the present invention is preferably used in a range of 100 g to 1000 g in terms of solid weight per 1 m ² , and a desired finish (design) ), For example, 100-800 g, 100-500 g, 150-4
Various ranges such as 00 g and 200 to 300 g can be selected.

The coating composition of the present invention is characterized by having a remarkably high coating film hiding power as compared with a conventional coating material containing slaked lime as a main component. For example, when the coating composition of the present invention is applied on a black-and-white plate, the thickness of the coating film from which it is impossible to determine the black and white of the base when observed through the formed coating film with the naked eye is 500 μm or less, preferably 300 μm
The thickness is preferably 200 μm or less, more preferably 100 μm or less. In the present invention, the coating film hiding power is the minimum film thickness of a coating film that cannot recognize the color of the base material when the coating composition is applied to the base material, and specifically, is applied on a black and white plate. It means the minimum thickness of the coating film that makes it impossible to determine the black and white of the base when observed with the naked eye through the coating film.

Examples of the inorganic filler include inorganic aggregates (fine aggregates) such as silica sand, cold water sand, recycled aggregates such as perlite, vermiculite, shirasu spheres and sludge fired aggregates, as well as kaolin, halloysite, montmorillonite, Natural inorganic materials such as bentonite, gibbsite, mica, ceramic sand, glass beads, perlite, acid clay, pottery stone, laurite, feldspar, limestone, gypsum, dolomite, magnesite, talc; barium hydroxide, magnesium hydroxide, natural Water-insoluble metal hydroxides such as calcium; calcium silicate hydrates such as tobermonite and zonotolite; hydrates of various oxides such as calcium aluminate hydrate and calcium sulfoaluminate hydrate; alumina and silica , Hydrous silicic acid, magnesia, zinc oxide, spinel, synthetic calcium carbonate Beam, calcium phosphate, magnesium carbonate, and powder, fiber or granular mineral material such as synthetic minerals such as barium sulfate, potassium titanate.

The particle size of these inorganic materials is not particularly limited, but may be in the range of 60 to 130 mesh or 80 to 100 mesh. In addition, when an inorganic filler such as an inorganic fine aggregate is blended into the coating composition of the present invention, the proportion thereof can be appropriately set.
5 to 100 parts by weight, preferably 10 to 100 parts by weight
The range may be, for example, from 50 to 50 parts by weight, more preferably from 20 to 30 parts by weight. As the (pigment) dispersant and wetting agent, those commonly used by being usually blended in paints can be widely used. For example, formalin condensate of sodium alkylnaphthalenesulfonate, low molecular weight ammonium polyacrylate, low molecular weight styrene-malein Acid ammonium copolymer,
Examples thereof include fatty acid esters and alkylphenol ethers of polyoxyethylene, sulfosuccinic acid derivatives, block polymers of polyethylene oxide and polypropylene oxide, and the like. These mixing ratios can also be appropriately selected and are not limited.
In the range of 0.05 to 5 parts by weight, especially 0.1
A range of 範 囲 4 parts by weight can be exemplified.

The defoaming agent is not particularly limited as long as it is generally used by being blended into a paint or a spraying material for construction, and any of them can be employed. For example, various foam inhibitors and foam breakers such as octyl alcohol, glycol derivatives, cyclohexane, silicon, pluronic surfactants, and polyoxyethylene alkyl phenyl ether can be mentioned. The mixing ratio of these components can be appropriately selected and is not limited, but is usually 0.01 to 5 parts by weight, particularly 0.1 to 2 parts by weight, per 100 parts by weight of slaked lime.

Examples of the thickener include cellulosics such as methylcellulose, hydroxyethylcellulose and hydroxypropylmethylcellulose; polysaccharides such as saccharose and glucose; acrylics; and others, aluminum stearate, zinc stearate, organic bentonite, silica gel, polyvinyl alcohol, Examples thereof include sodium alginate, silicic acid, bentonite, and sodium caseinate.

The coating composition of the present invention may further contain diatomaceous earth or zeolite (including synthetic zeolite). Diatomaceous earth is attracting attention as a natural material that does not contain harmful substances like stucco.By blending diatomaceous earth and zeolite, the moisture control and dew condensation prevention of the coating film are improved and improved, and heat insulation and deodorization are achieved. Various functions such as effects can be provided.

The coating composition of the present invention contains slaked lime in an amount of 30 to 80% by weight, preferably 40 to 80% by weight, more preferably 50 to 80% by weight, in terms of solid weight, based on solid content.
% By weight, even more preferably 60-75% by weight; 3-55% by weight of vinyl resin, preferably 4-50% by weight,
More preferably, it contains 10 to 30% by weight, and 1 to 15% by weight of titanium oxide, preferably 2 to 30% by weight.
It is preferred that the content is 10% by weight, more preferably 3 to 8% by weight.

These components are used when the solid content of the coating composition of the present invention is 40 to 80 per 100% by weight of the coating composition.
% By weight, preferably 50 to 70% by weight.

The coating composition of the present invention does not contain various fiber materials such as hemp, Japanese paper, shiroko, wood pulp, synthetic fiber and glass fiber which have been conventionally compounded in plaster wall materials for the purpose of preventing cracking. However, one of the features is that a coating film having excellent adhesion, toughness, and film-forming properties can be formed without cracking.

In general, the presence of the fiber material in the coating is caused by the problem that the discharge port of the spray or the gun is blocked at the time of coating, the poor workability (painting workability) such as the necessity of pressing the iron after the coating process, and the There is a tendency that the coating film surface becomes fluffy or the coating surface becomes non-uniform, and there is a problem of film forming property, and the coating film becomes flammable (flammable). Therefore, in order to form a thin coating film having excellent appearance and film-forming properties with a low coating amount, a coating composition containing no fiber material is preferable. However, the present invention does not restrict inclusion of a fiber material in the coating composition as long as it does not affect the coating workability, the film forming property, the appearance of the coating film, and the like.

The coating composition of the present invention is prepared by mixing the above-mentioned components with water and mixing with a conventional method of coating, for example, using a paint mixing equipment (mixer, shaker, mill, kneader, etc.) to obtain slaked lime, A vinyl resin, a pigment, and the like can be stably dispersed in water to prepare a coating liquid in various forms such as a spray liquid, a slurry, and a putty. Mixing can be usually performed at 20 to 95 ° C.

At this time, the coating composition is applied according to various coating methods such as spray coating (air spray, airless spray, etc.), brush coating, roller coating, putty coating and coat coating (curtain flow coater, roll coater). The viscosity is preferably adjusted so as to have a desired viscosity, and a preferable viscosity range can be appropriately selected and adjusted in consideration of coating workability, leveling, appearance of a coating film, and the like. Usually, it is prepared to have a range of 100 to 60,000 centipoise at normal temperature (25 ° C. ± 5). For example, the viscosity of the liquid coating composition is 300 to 3000 at room temperature so as to be suitable for brush coating, roller coating or spray coating.
Centipoise, preferably 500 to 2000 centipoise, more preferably 700 to 1300 centipoise, and still more preferably 800 to 1000 centipoise. The viscosity of the putty-like coating composition is not limited, but is 500 at room temperature (25 ° C. ± 5).
0-30000 centipoise, preferably 5000-2
0000 centipoise, more preferably 6000-10
000 centipoise.

The coating composition of the present invention is used for coating interior and exterior surfaces such as ceilings and walls (inner and outer walls) of various buildings, and as a base material for ceilings and walls (inner and outer walls) of buildings. And various building materials (cloths, panels, boards) used as decorative materials
Can be used for painting. Further, after the coating composition of the present invention is applied according to a conventional method, it is possible to further apply a design finish by performing patterning with an uneven patterning roller or treating the coating film surface.

The coating composition of the present invention preferably has the properties of a coating solution and the appearance and physical properties of a dried coating film of Japanese Industrial Standards.
Regarding at least two types of paint specified in JIS K 5663-1995 (1) State in a container, (2) Painting workability, (3) Low temperature stability, (4) Appearance of coating film, (5) Alkali resistance Satisfies the requirements of (6) wash resistance and (7) concealment ratio.

Specifically, the coating composition of the present invention
When measured according to the method of JIS K 5400 according to the provisions of K 5663-1995, at least the following quality (JIS K 5663-199
It is an architectural coating composition having 5): (1) State in a container: When stirred, there is no lump and the whole contents become uniform: (2) Painting workability: Painting work with two coats (3) Low temperature stability: No deterioration when cooled to -5 ° C: (4) Appearance of coating: Appearance of coating is normal: (5) Alkali resistance: Calcium hydroxide saturated solution (20 ± 1
(6) Washing resistance: withstands 100 washes: (7) Hiding ratio: 0.93 or more, preferably 0.95 or more Further, the coating composition of the present invention has a water resistance. (See JIS K 5400 8.
Regarding item 19), there is no abnormality when immersed in deionized water for 96 hours (5.9 of JIS K 5663-1995), and accelerated weather resistance (JIS K 5400
Regarding 9.8.1), it is preferable that the degree of chalk is 8 or more, there is no blistering, peeling or cracking, and the degree of color change is not greater than that of the sample (5.12 of JIS K 5663-1995). ,
In addition, the hiding ratio is 0.93 or more (5.8 of JIS K 5663-1995), preferably 0.95 or more, and furthermore, the weather resistance (JIS K 5400
Regarding 9.9), after 12 months test period, blistering, peeling,
It is preferable to satisfy the requirement that there is no cracking, the degree of color change and the degree of chalking are not large as compared with the sample (5.13 of JIS K 5663-1995).

[0048] The coating composition of the present invention is not particularly limited by the drying time, but is JIS K 5663-1995.
In accordance with 5.6 of JIS K 5400, when prepared according to the test method of 6.5, prepare a semi-cured state at 20 ° C within 2 hours and a semi-cured state at 5 ° C within 4 hours. Is preferably performed. This can be performed by appropriately adjusting the solid content, the water content, and the viscosity to be added to the coating composition. (2) Painted article The present invention also provides a coated article obtained by applying the above coating composition.

The substrate (object to be coated) to which the coating composition of the present invention is applied is not particularly limited, but is preferably a base material for a ceiling or a wall (inner / outer wall) of a building or a decorative material. Various building materials used as materials, for example, cloths, boards, panels and the like can be mentioned. In addition, such base materials (building materials)
The surface may be subjected to various treatments such as a sealer treatment.

Examples of the cloth include a wide variety of cloth materials used for building interiors (such as indoor walls and ceilings). Examples of the cloth material include a fibrous sheet such as a nonwoven fabric or a woven fabric made of paper or various fibers. Specifically, as paper, Japanese paper, Western paper (high quality paper, medium quality paper), kraft paper, tissue paper, backing paper, resin impregnated paper, etc.
Any of cardboard, cardboard, and the like may be used, and examples include paper that has been subjected to a flame-retardant treatment and is suitable for application of wallpaper, such as flame-retardant backing paper and non-combustible paper. Examples of the fibrous sheet include a porous woven fabric, a nonwoven fabric, and a knitted fabric obtained by using natural fibers; glass fibers; or synthetic fibers such as polypropylene, acrylic, nylon, polyester, polyamide, and vinylon as constituent materials. it can. In addition, even if the above-mentioned material is used alone,
Also, two or more kinds can be arbitrarily used in combination.

Examples of the board and panel include a wide range of board materials and panel materials used for building interiors (such as indoor walls and ceilings) and exteriors. Specifically, wood board, plywood, medium density fiber board, plastic board,
Cement mortar, concrete board, PC panel, AL
Examples include C panel, asbestos slate, gypsum board, particle board, foam cement board, wood chip cement board, calcium silicate board, siding board, and the like. Preferably, it is a gypsum board, a gypsum particle board, a wood board, a medium density fiber board, a plastic board, a siding board (including a metal-based and a ceramic-based).

The method of applying the coating composition to these base materials (building materials) is not particularly limited, and a coating method using a roll coater, a flow coater, a brush or a roller, and a spraying method using a spray or various guns. Methods can be mentioned. According to spray coating using compressed air as an example, for example, a spray liquid or slurry of a coating composition prepared to have an appropriate viscosity is first sprayed onto one surface of a substrate. By this spraying, the coating composition forms a coating film on the surface of the substrate and is integrated with the substrate. At this time, the vinyl resin component contained in the coating composition firmly binds components such as slaked lime, and the coating composition is conjugated to the surface of the base material to integrate the coating layer with the base material. Thereby, delamination can be prevented. Next, the coating composition applied to the substrate is dried and cured. Such a method can be easily performed by applying the coating composition to the substrate and then subjecting the coating composition to natural drying, ventilation drying, or forced drying. The coated product of the present invention can be finished by applying a design to the surface of the further formed coating layer with a roller having a concavo-convex pattern or polishing and polishing with a file or various types of polishing machines, if necessary.

The thickness of the coating film formed from the coating composition of the present invention is not particularly limited as long as the coating surface of the substrate is sufficiently covered and covered. The coating composition of the present invention has a coating film hiding power of 500 μm or less, preferably 30 μm or less, as described above.
It can be prepared so as to have a thickness of 0 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less. Therefore, the thickness of the coating film is at least 500 μm, preferably at least 300 μm,
More preferably, the thickness may be at least 200 μm, even more preferably at least 100 μm,
In view of the physical properties and functions of the coating film such as cost, coating workability and film forming property, and humidity control property, it is usually 0.1 to 3 m.
m, preferably 0.2 to 2 mm, more preferably 0.3
To 1.5 mm, more preferably 0.5 to 1 mm. However, the thickness of the coating film is preferably thicker from the viewpoint of the humidity control function, and the present invention does not limit the formation of a thicker coating film using the coating composition of the present invention.

A coated article having a coating film formed from the coating composition of the present invention has excellent humidity control properties (moisture absorption and moisture release properties),
While exhibiting a high dew condensation preventing effect, it exhibits a plaster-specific texture (appearance and texture such as color, gloss, and fineness). In addition, the painted product thus produced does not cause inconvenience such as unevenness in color, unevenness in gloss and unevenness in blown light, unevenness in color, and unevenness in various places where building materials are arranged, such as direct sunlight, oblique light, lighting, and shading. With a color, luster and texture. Such properties of the painted object are useful for various building materials such as inner / outer wall materials and ceiling materials.

In general, in the case of building materials such as boards (panels) and cloths, the processing of joints and joints between building materials after construction tends to be a problem. For example, according to a painted product (building material) prepared by applying the coating composition of the present invention containing no fiber material,
After construction on a wall or the like, the coating surface of the joint or the joint of the building material can be polished and polished to achieve a continuous and uniform finish almost indistinguishable from the surrounding coating layer. Further, according to a painted product (building material) prepared by applying the coating composition of the present invention containing no fiber material, there is also an advantage that repair after being applied to a wall or the like can be easily performed. That is, when the building material is damaged or stained after the construction, it is possible to partially repair only the damaged portion using the coating composition of the present invention. In such repairs, first of all, the damaged part is first cut,
This portion is filled with the coating composition of the present invention having the same composition as that of the peripheral coating layer but having a reduced water content to increase the viscosity, and after curing and curing, the surface is polished and ground as necessary. Can be. By polishing, it becomes possible to repair and repair the damaged portion so that the damaged portion cannot be distinguished from other peripheral regions.

This is construction material construction (interior and exterior construction).
It is also useful in That is, when the painted object (building material) of the present invention, in particular, the interior and exterior panels are nailed or screwed on the wall base material, the nail head recesses on the surface of the building material formed by nailing (screw) as described above are relatively small. A high-viscosity coating composition (putty) is filled, and if necessary, a coating composition (spray liquid, slurry) is further applied thereon to cure and cure. By grinding and polishing, the nailing portion can be constructed so that the nailing portion is hardly recognized (see FIG. 1). Thereby, the sticking of the building material with the adhesive can be avoided. (3) Construction method of interior and exterior of building Further, the present invention relates to a construction method of interior and exterior of a building using the coating composition or the painted product (building material). Examples of the construction method of the present invention include the following embodiments. A. A coating method, which comprises applying the coating composition of the present invention to the surface of a building base material, drying the coating composition, and optionally polishing the coating film surface, if necessary. B. (i) a step of connecting a plurality of the building materials of the present invention to the building base material, (ii) a step of filling or applying the coating composition of the present invention to the joint of each building material and drying, and (iv) A method for constructing interior and exterior of buildings, including a step of polishing and polishing the coating film surface as necessary. C. (i) a step of arranging a plurality of building materials of the present invention in a building base material, (ii) a step of filling or applying the coating composition of the present invention to a joint of each building material, if necessary, (iii) the joining. Covering the part with a reinforcing member, (iv) a step of applying the coating composition of the present invention on the reinforcing member and drying, and (v) if necessary, a step of polishing and polishing the coating film surface, Construction method of building interior and exterior.

The construction method of the interior and exterior of a building according to the present invention includes the steps of:
The method includes the method of applying and laminating the coating composition of the present invention, and the method of attaching or arranging the building material (cloth, panel, board) of the present invention to the inner and outer wall base material.

Specifically, the coating method of the present invention is preferably carried out by directly or after applying a sealer or a primer treatment on the surface of a base material (base material) for the inner and outer walls and ceiling of a building. Has a viscosity of 30 at room temperature (25 ± 5 ° C).
0-3000 centipoise, preferably 500-200
A coating composition of 0 centipoise, more preferably 700 to 1300 centipoise, is applied and dried at room temperature or air until solidified, and then, if necessary, the surface of the coating layer laminated on the inner and outer wall base material is polished. It can be done by shearing.

The base material (base material) of a building to which the coating composition of the present invention can be applied is not particularly limited, and examples thereof include concrete, cement mortar, gypsum plaster, dolomite plaster, asbestos slate, gypsum board, Cement and gypsum coatings such as plaster walls, pulp cement boards, asbestos cement calcium silicate boards, wood wool / wood chip cement boards, GRC glass fiber reinforced concrete panels and asbestos cement hollow extruded boards; veneer boards, laminates, plywood , Wood-based substrates such as wood fiber board and particle board; plastic-based substrates made of vinyl resin such as vinyl chloride resin and vinyl acetate; and other metal-based substrates. ,
The painted material of the present invention (building material such as cloth, panel, board, etc.) is applied to the base material (base material) of the inner and outer walls and ceiling of the building or the inner and outer wall frames and lower crossbars provided on the base material (base material). ,
A step of arranging the side end surfaces in contact with each other, a coating composition of the present invention in a surface area of a joint portion of each building material, preferably having a viscosity at room temperature of 300 to 3000 centipoise, preferably 500
~ 2000 centipoise, more preferably 700 ~ 13
The coating can be carried out by applying a coating composition of 00 centipoise, drying until solidified, and then, if necessary, polishing the surface of the coating layer region.

When the interior and exterior panels are used as a building material, the form of continuous connection of the panels is not particularly limited, but an example is a connection method shown in FIG. In particular,
A bumping method (FIG. 2 (a)) for forming a flat panel surface by abutting the side surfaces of a panel having vertical side surfaces to form a continuous panel surface (FIG. 2 (a)). A butt V-groove method (FIG. 2B) in which the side surfaces are abutted and connected to form a panel surface having a V-shaped groove in the connected portion (FIG. 2B), The interior and exterior panels each forming a connection such as phase-locking or phase-locking or main-linking are connected to each other with their side surfaces in contact with each other, and a panel surface having a square groove in the connecting portion is formed. An example of a butt or eye-opening method (FIG. 2 (c)) is shown.

When a groove is formed at the joint portion of the panel as shown in FIGS. 2B and 2C, the same as the coating composition applied to the groove at the joint portion prior to the application of the coating composition. High viscosity (low water content) coating composition, suitably 5000 to 20000 centipoise at room temperature, preferably 6
000 to 10,000 centipoise, more preferably 70
A coating composition having a viscosity of 100 to 8000 centipoise is filled as a sealing material, and then 30
It is preferable to apply a coating composition having a viscosity of 0 to 1300 centipoise. Prior to filling or application of the coating composition, the joint between the panels can be covered with a reinforcing member (FIGS. 3 and 4).

Examples of the reinforcing member include tape-shaped members such as woven fabric, non-woven fabric, ceramic paper, synthetic paper, mesh, and cold gauze. These may be used as they are or by applying a filling paint, resin, or the like thereto. Or laminated film (FIG. 3). Further, a plastic or metal joiner having a substantially T-shaped or substantially E-shaped cross section can be used as the reinforcing member (FIG. 4).

According to the construction method of the present invention, the joints of building materials such as cloths and panels are made to be substantially uniform or continuous without any noticeable seams at the joints of the building materials such as cloths and panels, particularly by coating or polishing in the finishing step. It is possible to provide interior and exterior with good appearance. (4) Method of Restoring Building Interior / Exterior The present invention also relates to a method of restoring a construction surface of a building interior / exterior using the above-mentioned building material or coating composition. Embodiments of such a repair / repair method include the following.

A method for repairing a damaged portion of a wall surface having a coating layer formed by applying a coating composition of the present invention containing slaked lime, a vinyl resin, titanium oxide and water, wherein (i) If necessary, a step of shaving off the coating layer of the damaged portion, (ii) a step of filling or applying the coating composition of the present invention to the damaged wall portion and drying, and (iii) if necessary,
A method for repairing a building interior / exterior wall surface, including a step of polishing and polishing the coating film surface.

[0065]

The coating composition of the present invention, even though it is an aqueous coating, exhibits functions such as humidity control and dew condensation prevention by containing slaked lime. Because of this,
In particular, it is extremely useful as an interior paint or a building material paint for walls, ceilings, indented inner walls and the like of condominiums and the like where moisture is a problem. In addition, the coating composition of the present invention, particularly containing titanium oxide as a pigment, has excellent hiding power at a low coating amount without impairing humidity control properties, and has adhesion and film forming properties (yield, crack resistance, (Flexibility, appearance), it is possible to form a thin coating film having useful functions such as humidity control at low cost. Further, the coating composition of the present invention,
Excellent adhesion and film-forming properties (yield, crack resistance, flexibility, toughness) without blending fiber materials such as susa, which was indispensable for plaster containing slaked lime as a main component.
Thereby, the painting operation can be further simplified.

The coating composition of the present invention is a one-pack type paint containing slaked lime as a main component, and has at least two kinds of synthetic resin emulsion paints (indoor paints) specified in JIS 5663-1995. It is characterized by having. Therefore, since it can be provided in a state filled in a container with one liquid prepared in advance in a factory or the like, the labor of preparation at the site can be omitted, and the remaining material after painting can be returned to the container and stored again. It has advantages. In addition, since the coating composition of the present invention is prepared mainly from a natural material called slaked lime, today, when `` chemical sensitivity '' or `` sick house syndrome '' is a problem, the coating composition and the coating composition are used. The building materials (cloths, boards, panels, etc.) prepared by use are useful as human-friendly indoor coating materials (interior coating materials) and interior building materials (wall materials, ceiling materials).

The coating composition of the present invention is a coating composition having a very high commercial value in terms of low cost, ease of construction, aesthetics, and functionality. Further, the coating composition of the present invention,
It can be suitably used for concealing seams between cloths or panels, and because it can be made into a thin film, it is also useful for repairing and repairing interior and exterior walls and ceiling surfaces. Moreover, it is a paint composition with high commercial value that can be widely used for renovation work.

[0068]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the following embodiments. However, these examples are only one embodiment of the present invention, and the present invention is not limited to these examples. Example 1 Slaked lime 44.0 (100.00%) Vinyl resin emulsion 30.0 (28.30%) Titanium oxide (EP-498, Dainichi Seika) 4.5 (10.23%) Thickener (SP-600, Daicel Chemical) 0.03 Antifoaming agent (KM-70, Shin-Etsu Chemical) 0.67 Dispersant 0.9 water Residual amount of total 100.0 parts by weight Solid components and resin are obtained by mixing the above components in a paint mixing mixer and stirring. The components were stably dispersed in water to prepare a one-part aqueous coating composition of the present invention (viscosity 800 cps (25 ° C.) B-type viscometer; solid content: about 62%). The above vinyl resin emulsion (vinyl acetate / ethylene copolymer)
Used a solid content of 41.5% by weight. In the above formula, the value in parentheses is 10 slaked lime.
It shows the mixing ratio of the vinyl resin emulsion (solid content) and titanium oxide when the content is 0% by weight.

Example 2 Slaked lime 50.0 (100.0%) Vinyl resin emulsion 26.0 (26.0%) Titanium oxide (EP-498, Dainichi Seika) 4.0 (8.0%) Thickener (SP-600, Daicel Chemical Co., Ltd. 0.03 Antifoaming agent (KM-70, Shin-Etsu Chemical) 0.47 Dispersant 0.5 Leveling agent 1.0 Water Residual amount 100.0 parts by weight Put the above ingredients in a paint mixing mixer The one-component aqueous coating composition of the present invention (viscosity 1000 cps (25 ° C.) B-type viscometer; solid content: about 69%) is prepared by stably dispersing the solid content and the resin component in water by stirring. did. The above vinyl resin emulsion (vinyl acetate / veova copolymer)
Used a solid content of 50.0% by weight.

Example 3 Slaked lime 38.0 (100.00%) Vinyl resin emulsion 26.0 (34.21%) Titanium oxide (EP-498, Dainichi Seika) 2.0 (5.26%) Thickener (SP-600, Daicel Chemical Co., Ltd. 0.1 Antifoaming agent (KM-70, Shin-Etsu Chemical) 0.7 Dispersant 0.9 Extender pigment (CaCO ₃ ) 3.8 Water Remaining total amount 100.0 parts by weight The solid content and the resin component are stably dispersed in water by stirring in a mixer, and the one-component aqueous coating composition of the present invention (viscosity 1000 cps (25 ° C.) B-type viscometer; solid content content of about 58 %) Was prepared. The vinyl resin emulsion (vinyl acetate / acrylic copolymer) used had a solid content of 50% by weight.

Example 4 Slaked lime 40.0 (100.0%) Vinyl resin emulsion 32.0 (40.0%) Titanium oxide (EP-498, Dainichi Seika) 5.0 (12.5%) Thickener (SP-600, Daicel Chemical) 0.3 Antifoaming agent (KM-70, Shin-Etsu Chemical) 0.3 Preservative (PL-600, Tokyo Fine Chemicals / Daiwa Chemical) 0.9 Water Residual amount 100.0 parts by weight Paint the above components The solid content and the resin component are stably dispersed in water by stirring in a mixing mixer, and the one-component aqueous coating composition of the present invention (viscosity 800 cps (25 ° C.) B-type viscometer; solid content content (About 62%). The vinyl resin emulsion (vinyl acetate / vinyl chloride copolymer) used had a solid content of 50% by weight.

Example 5 Slaked lime 40.0 (100.0%) Vinyl resin emulsion 30.0 (37.5%) Titanium oxide (EP-498, Dainichi Seika) 4.0 (10.0%) Thickener (SP-600, Daicel Chemical) 0.4 Antifoam (KM-70, Shin-Etsu Chemical) 0.3 Preservative (PL-600, Tokyo Fine Chemicals / Daiwa Chemical) 0.8 Water Residual amount 100.0 parts by weight The solid content and the resin component are stably dispersed in water by stirring in a mixing mixer, and the one-component aqueous coating composition of the present invention (viscosity 800 cps (25 ° C.) B-type viscometer; solid content content (About 60%). The vinyl resin emulsion (vinyl chloride / vinylidene chloride copolymer) used had a solid content of 50% by weight.

Example 6 The coating composition prepared in Example 1 was put into an airless spray, sprayed evenly on one side of a gypsum board (vertical 20 cm × width 20 cm × thickness 1 cm, manufactured by Yoshino gypsum), and dried by ventilation drying. (Total application amount (total paint amount) 500g / m ² ,
A dried coating film (0.35 mm) was formed. The plaster panel had a uniform appearance without any blowing unevenness, color unevenness, and gloss unevenness against various lights such as direct sunlight, oblique light, and illumination. The panel was excellent in hygroscopicity and moisture release, and was able to significantly prevent the occurrence of dew condensation even in an environment with a humidity of 80%. Further, it was confirmed that even when an open flame was brought close to the surface of the coating layer of the panel, it did not ignite, did not generate smoke, and had excellent flame resistance.

Next, the obtained gypsum panel was nailed with the coating layer on the wall base material with the nail as the interior wall material in the room. The nail head is hit until it sinks into the inside of the coating layer, and the resulting nail head concave portion is formed by 30 parts by weight of vinyl resin emulsion (vinyl acetate / ethylene copolymer) with respect to 100 parts by weight of slaked lime (solid equivalent). And a thickened kneading putty-like coating material (viscosity: 8000 centipoise), which was mixed and kneaded slightly with water in the composition comprising the thickening material, was solidified, and then solidified. Was applied and finished. The interior material constructed as a wall material was finished in such a way that the surface of the nailed part (repair part) could not be distinguished from the surrounding part and was beautifully integrated. Moreover, the coating film formed on the interior panel had sufficient toughness and flexibility without cracking even after being applied to the indoor wall.

Experimental Example 1 Using the coating composition prepared in Example 1, the adhesive strength and the strength of the dried coating film were measured. (1) Adhesive strength The paint composition prepared in Example 1 was put into an airless spray, and a sidewalk board (with and without primer treatment) and a veneer board (without primer treatment) (30)
(0 x 150 x 5 mm) Sprayed evenly on one side, solidified by ventilation drying, and 0.5mm thick panel (test plate)
It was created. Using three such panels each
A test was performed in accordance with the test (tensile strength) specified in JIS K5400-1990 8.8, and the adhesion of the coating film was evaluated. In addition, ADHESION TESTERELCOMETER was used as a tensile tester.
Specifically, the tensile strength was calculated by measuring the load (kgf) at the time when the adhesive surface fracture or the internal surface fracture occurred.
5400-1990 8.8). As a result, Table 1 shows the average of three samples performed on each test plate.

[0076]

[Table 1]

(2) Dry Film Strength The test plate prepared above was subjected to a test in accordance with the pencil scratch value measurement method (hand scratch method) specified in JIS K5400-1990 8.4 to evaluate the film strength. Specifically, the surface of the coating film formed on the test board (sidewalk board) prepared above was scratched with a pencil, and the core density (H) of the pencil was such that the coating film was scratched twice or more in five tests. ), The strength of the coating film formed from the coating composition of the present invention was evaluated as HB.

Experimental Example 2 The coating composition prepared in Example 1 was put into an airless spray, sprayed evenly on one side of a gypsum board (vertical 40 cm × width 25 cm × thickness 5 mm), and solidified by ventilation drying to form a coating film. A panel having a thickness of 0.6 mm was prepared.

A humidity control test was carried out using six such panels. In order to properly evaluate the humidity control of the coating film layer, a moisture-proof seal was applied to the side and back surfaces of the panel (the surface on which no paint was applied) to prevent the passage of water vapor. In particular,
The building material panel of the present invention was left in an environment at a relative humidity of 65% and a temperature of 20 ° C., weighed 48 hours after the amount of water absorbed almost reached equilibrium, and then the subject was weighed at a relative humidity of 98% and a temperature of 20 ° C.
Was weighed 48 hours after the water absorption rate reached substantially equilibrium again, to determine the water absorption of the panel per unit surface area (1 m ² ). Next, the sample after the moisture absorption test was similarly transferred to an environment of a relative humidity of 65% and a temperature of 20 ° C.
After standing for a period of time, the weight was measured to determine the amount of water absorbed by the panel per unit surface area (1 m ² ). Then, the difference between the water absorption amounts in these experiments was evaluated as the moisture absorption amount and the moisture release amount, respectively.

The results are shown in Table 2 together with the humidity control effect of a vinyl chloride wallpaper (length 40 cm × width 25 cm) used as a comparative product.

[0081]

[Table 2]

The indications in the table mean the following. 20 ° C 65% weight (g / m ² ) ^{* 1} : 1m ² after standing at 20 ° C 65% RH for 48 hours
Weight per unit 20 ° C 65% weight (g / m ² ) ^{* 2} : 1m ² after standing at 20 ° C 65% RH for 24 hours
Weight 20 ° C. 98% by weight per ^{(g / m 2): 20} ℃ 98% RH 48 hours 1 m ² per weight hygroscopic after standing ^{(g / m 2): 20} ℃ 98% by weight - 20 ° C. 65% by weight ^{* 1} Moisture release (g / m ² ): 98% by weight at 20 ° C-65% by weight at 20 ° C ^{* 2} This indicates that the coating formed by applying the coating composition of the present invention has an excellent humidity control function. (Hygroscopicity and release) were confirmed.

Experimental Example 3 The paint compositions prepared in Examples 1 and 2 (Paints 1 and 2)
Based on the method specified in Japanese Industrial Standards JIS K 5400, (1) state in the container (JIS K 5400 4.1
(2)), (2) Paint workability (6.1 of JIS K 5400), (3) Low temperature stability (5.1 of JIS K 5400), and check the formed coating film for (4) Drying time (JIS 6.5 of K5400),
(5) Appearance of coating film (JIS K 5400 7.1), (6) Hiding ratio (JIS K 5400
7.2 of 5400), (7) Alkali resistance (8.2 of JIS K 5400
1), (8) Washing resistance (8.11 of JIS K 5400), (9) Water resistance (J
8.19 of IS K 5400) and (10) Accelerated weather resistance (JIS K 5400
9.8.1). The test method and evaluation of each item were all based on the method specified in JIS K5663-1995.

(1) State in a container (JIS K5663-1995)
5.3) Fill the container (metal inner coated can) with paint,
After leaving still for 4 hours or more, the lid of the container was opened and the contents were stirred with a stick to check the state of the paint. When the mixture was stirred, there was no hard lump and the whole contents were uniform. "Good", when there was no lump but it was difficult to make it uniform, "normal", and when the lump was recognized was "poor".

(2) Painting workability (JIS K5663-1995, 5.4) Paint was uniformly applied to the smooth surface of a test plate (flexible plate, 500 × 200 × 3 mm) with a brush (first time, amount of application: 1
After 6 hours, the second brush application (application amount: 9 to 11 ml / 1 sheet) is performed, and the coating workability is evaluated based on the difficulty of carrying the brush when applying the second application. evaluated. When it is not difficult to carry the brush at the time of the second application, the evaluation is “good” as “the application is not hindered by the second application”, and “normal” and “bad” are sequentially determined according to the difficulty of the brush transportation. did.

(3) Stability at low temperature (5.5 of JIS K5663-1995) A container (metal inner coated can) is almost completely filled with the paint and hermetically sealed, and kept in a low temperature incubator at a temperature of -5 ± 2 ° C. for 18 hours. After storing, remove and leave at room temperature for 6 hours.
Repeated times. Next, the lid of the container was opened, and the paint in the container was stirred with a stick to check whether the paint became uniform. Further, the coating workability was examined according to the method (2) described above. Specifically, it was applied once with a paint before being put into a low-temperature constant temperature oven, applied twice using a treated paint whose low-temperature stability was checked, and evaluated for difficulty in carrying a second brush. Furthermore, the test plate after the above-mentioned coating workability test was dried for 24 hours, and the appearance of the formed coating film was evaluated. When the paint was easily uniform and there was no abnormality in the coating workability and appearance of the coating film, the evaluation was "good" as "no deterioration when cooled to -5 ° C". And "Poor".

(4) Drying time (5.6 of JIS K5663-1995) Paint was applied to one side of a glass plate (200 × 100 × 2 mm) with a clearance of 100 μm.
m using a B-type film applicator, put it in a thermo-hygrostat at 20 ± 1 ° C, 65 ± 5% humidity, and the coating film is in a semi-cured state. The drying time was measured until the coated surface was rubbed gently so as not to scratch the coated surface.

(5) Appearance of the coating film (5.7 of JIS K5663-1995)
After drying for an hour, the coated surface was visually observed under diffused daylight to evaluate the size of the brush, the presence or absence of holes and slackness, and the uniformity of the coating surface (unevenness). When the degree of brush eyes is not large, there are no holes or slacks, and the coating film surface is uniform (no unevenness), the evaluation is evaluated as "good" as "the appearance of the coating film is normal", and the degree of failure is sequentially "Normal" and "Poor" according to

(6) Concealment ratio (5.8 of JIS K5663-1995) Fixation ratio test paper was fixed on a glass plate, and a paint was applied thereon using a B-type film applicator with a gap of 150 μm, and allowed to stand for 24 hours. And dried. The luminous reflectance of the coating film formed on the white background and the black background of the test paper was measured at three places of the test piece using a reflectance measuring device. From the obtained luminous reflectance, the hiding ratio was determined from the following equation.

[0090]

(Equation 1)

(7) Alkali resistance (JIS K5663-1995, 5.1
0) Test piece: A paint was applied to the surface of a flexible plate (150 × 70 × 3 mm) whose peripheral and back surfaces were previously coated with the same type of paint two or three times with a brush at a rate of 1 ± 0.1 ml / 100 cm ^2. After 6 hours, apply once more in the same manner and dry for 5 days.
Next, the periphery and back surface of the test plate were covered with paraffin,
Test pieces were prepared (three pieces were prepared, one of which was an original test piece). The test piece was placed in a calcium hydroxide saturated solution (20 ± 1).
C.) for 18 to 48 hours, and the state of the coating film was evaluated by comparing it with the original test piece immediately after taking out the two test pieces from the solution and two hours later (swelling, cracking, and peeling). , Holes, softening, color, luster). Evaluation: Test piece 2 after immersion treatment for 48 hours or 18 hours
When no swelling, cracking, peeling, pitting, or softening was observed on the coating films, there was no coloring or turbidity of the immersion solution, and the degree of gloss change or discoloration was not greater than that of the original test specimen, `` 48 Evaluation is "good" as "No abnormality when soaked for 18 hours", or "Good" as "No abnormality when soaked for 18 hours"
And

(8) Washing resistance (5.11 of JIS K5663-1995) Test piece: Painted with a B-type film applicator with a gap of 150 μm on the long side of about 400 mm at the center of a flexible plate (430 × 170 × 5 mm) And dried for 7 days with the coated surface facing upward as test pieces (two pieces prepared). Using a washer machine, rub the coating surface of the test piece (2 pieces) wetted with 0.5% soap water by reciprocating (100 to 500 times) with a brush, and then remove the test piece from the testing machine. Wash with water and brush the length of the center of the mark
The coating film of the 100 mm portion was visually inspected under diffused daylight for the presence or absence of breakage or wear of the coating film. Evaluation: When 500 or more brush reciprocations, the coating film in the center part of both test pieces was not broken or worn and no exposure of the base material of the test piece was recognized, and the evaluation was "good" as "withstanding 500 washes". In addition, when no exposure of the substrate of the test specimen was observed after 100 or more reciprocations, the evaluation was "good" as "withstanding 100 washes".

(9) Water resistance (5.9 of JIS K5663-1995) Using the same test specimen (2 sheets) used in the above (7) Alkali resistance test, this was deionized water (20 ± 1 ° C.). ) For 96 hours, and the state of the coated surface was evaluated (wrinkles, blisters, cracks, peeling, color, gloss) immediately after the two test pieces were taken out of the solution and two hours later.

(10) Accelerated weathering resistance (JIS K5663-1995, 5.1
2) (Sunshine carbon arc lamp type: JIS K 5400 9.)
8.1) Specimen: A flexible plate (150 x 70 x 3 mm) previously treated with a synthetic resin emulsion sealer of JPIA-23 was evenly brushed twice with paint (amount applied per time: 1.0 ± 0.1).
ml / cm ² ) and dried for 5 days to obtain test pieces (two pieces, one of which was an original test piece). In addition, the interval between the first coating and the second coating is 6
Time. Irradiation was performed for 200 hours using a sunshine carbon arc lamp type light resistance tester (black panel temperature: 63 ° C, rain cycle: 120 minutes, 18 minutes), and the coating films of the original test piece and the weather resistance test piece were visually observed. Then, the degree of color unevenness and color gloss change, and the presence or absence of chalking, blistering, peeling, and cracking were examined. If the degree of chalk is 8 or more, no swelling, peeling or cracking, and the degree of color change is not greater than that of the original test specimen, the evaluation is evaluated as “good”, and the evaluation is evaluated as “normal” in accordance with the degree of failure. And "Poor".

Table 3 shows the results.

[0096]

[Table 3]

From these results, it was found that the coating composition of the present invention contains at least two kinds of synthetic resin emulsion paints,
In particular, it was confirmed that the paint satisfied one type of standard (JIS K5663-1995).

In Example 1, the ratio of the pigment (titanium oxide) to 100 parts by weight of slaked lime was 5 parts by weight,
The coating compositions were prepared at 8 parts by weight and 14 parts by weight, respectively, and the hiding ratio of the coating compositions was examined in the same manner according to JIS K5400 7.2. As a result, all the coating compositions satisfied the hiding ratio of 0.9 or more, preferably 0.93 or more.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a method of arranging a building material on a base material (base) according to the present invention.

FIG. 2 is a cross-sectional view showing a continuous construction mode of building materials (panels) of the present invention. (A) shows an abutment, (b) shows an abutment V-shaped groove, and (c) shows an eye-opening by a phased joint.

FIG. 3 is a cross-sectional view showing a panel joint, which has been processed by a panel construction method (using a tape material such as cold gauze as a reinforcing member).

FIG. 4 is a cross-sectional view showing a panel joint processed by a panel construction method (using a substantially T-shaped joiner as a reinforcing member).

[Explanation of Codes] Panel substrate 2. Coating layer 3. Nail 4. 4. Paint composition (putty) filling section Wall base material 6. Joint 7. 7. Tape material (reinforcing member) Joiner (reinforcing member)

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Claims (14)

[Claims] 1. A coating composition containing slaked lime, a vinyl resin, titanium oxide and water, wherein (a) the proportion of slaked lime is 30 to 80% by weight (solid basis), and (b) the vinyl resin is vinyl acetate. , Vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, V-acid (versatic aci
d) a polymer containing, as a monomer component, at least one selected from the group consisting of vinyl and vinyl benzoate, and the compounding ratio of the resin to 100 parts by weight of slaked lime is 10 to 70 parts by weight (solid basis); And (c) an architectural coating composition in which the mixing ratio of titanium oxide to 100 parts by weight of slaked lime is 2 to 30 parts by weight (solid basis). 2. The polymer according to claim 1, wherein the vinyl resin comprises at least one selected from the group consisting of vinyl acetate, vinyl chloride and vinylidene chloride as a monomer component.
The architectural coating composition according to the above. 3. The compounding ratio of titanium oxide to 8 to 15 parts by weight (solid basis) based on 100 parts by weight of slaked lime.
Or the architectural coating composition according to 2. 4. The architectural coating composition according to claim 1, wherein the mixing ratio of the vinyl resin to 100 parts by weight of slaked lime is 25 to 35 parts by weight (solid basis). 5. Titanium oxide in an amount of 2 to 10% by weight per solid content
The architectural coating composition according to any one of claims 1 to 4, wherein the composition is contained at a ratio of (in terms of solid weight). 6. The architectural coating composition according to claim 1, which does not contain a fiber material. 7. The architectural coating composition according to claim 1, wherein the hiding power of the dried coating film is 500 μm or less. 8. The architectural coating composition according to claim 1, which has a viscosity of 300 to 3000 centipoise at room temperature. 9. The coating liquid or its dried coating film (1) state in a container, (2) coating workability, (3) low temperature stability, (4) appearance of coating film, (5) alkali resistance , (6) Washing resistance, (7) Concealment ratio is JIS
The architectural coating composition according to any one of claims 1 to 8, which satisfies the properties of at least two paints specified in K 5663-1995. 10. A building material having a coating film formed from the coating composition according to claim 1. Description: 11. The coating composition according to claim 1, which is applied to the surface of a building base material or a base material, and after drying, the coated surface is polished as required. And painting method. 12. The coating according to any one of claims 1 to 9, wherein (i) a step of connecting a plurality of the building materials according to claim 10 to a building base material or a base material, and (ii) a joint between the building materials. A method for applying the composition to the interior and exterior of a building, comprising a step of filling or applying the composition and drying, and (iii) a step of polishing and polishing the coating film surface as necessary. 13. The method according to claim 1, wherein (i) the base material for the building or the base material is used.
(Ii) a step of filling or applying the coating composition according to any one of claims 1 to 9 to a joint of each building material, if necessary, A step of covering the joint with a reinforcing member, (iv) a step of applying the coating composition according to any one of claims 1 to 9 on the reinforcing member and drying, and (v) a coating film, if necessary. A construction method for interior and exterior of buildings, including a process of polishing and polishing surfaces. 14. A method for repairing a damaged portion of an interior / exterior surface of a building having a coating layer formed by applying the coating composition according to claim 1 on its surface, (i) if necessary, a step of scraping off the coating layer of the damaged portion, (ii) a step of filling or applying the coating composition according to any one of claims 1 to 9 to the damaged wall portion, and drying. And (iii) a method for restoring the interior and exterior surfaces of a building, including a step of polishing and polishing the coating film surface as necessary.