JP2000313840A - Coating material composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating material containing slaked lime as the major component and excellent in opacifying properties with reduced coating amounts, and coated materials coated therewith. SOLUTION: This coating material composition comprises slaked lime, an acrylic resin, an inorganic pigment and water, and as the compounding ratio, (a) the slaked lime is 30-58 wt.% (in terms of solids); (b) the acrylic resin which is a homopolymer or copolymer containing at least one member, as the monomer component, selected from the group consisting of (meth)acrylic acid, a (meth) acrylate ester, a (meth)acrylamide, and (meth)acrylonitrile is more than 70 pts.wt. (in terms of solids) based on 100 pts.wt. slaked lime; and (c) the inorganic pigment is 1-150 pts.wt. (in terms of solids) based on 100 pts.wt. slaked lime. Coated materials can be prepared by using the coating material 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 provides an architectural coating composition that forms a coating film having a plaster-specific calm texture and humidity control function, while satisfying various coating performances and coating film properties required as an aqueous coating material. About. 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 (boards, panels) for interior and exterior used as inner / outer wall materials, roof materials and ceiling materials. , Cross, etc.). 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. With the aim of developing a water-based paint with a specialty, we conducted a thorough study and found that by adding a specific acrylic resin and water to slaked lime, which is the main component of the plaster, with the texture and function of the plaster It has been found that an aqueous coating composition excellent in storage stability 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 conducted further studies based on such findings, and found that a specific amount of an inorganic white pigment such as titanium oxide is further added to the above-mentioned coating composition as a pigment to improve the humidity control property. It has been found that the construction surface can be concealed with an extremely small amount of application while having such functions, and that the film formability is excellent. From these facts, according to the coating composition of the present invention, low cost and low labor are required. It was confirmed that a coating film having a calm and heavy texture peculiar to plaster and exhibiting functions such as humidity control and dew condensation prevention properties could be formed.

The present invention has been developed based on such knowledge.

That is, the present invention provides the following 1. ~ 7. The coating compositions are as follows: A paint composition containing slaked lime, an acrylic resin, an inorganic pigment and water, wherein (a) the blending ratio of slaked lime is 30
(B) acrylic resin is (meth) acrylic acid, (meth) acrylic acid ester,
A homopolymer or a copolymer containing, as a monomer component, at least one selected from the group consisting of (meth) acrylamides and (meth) acrylonitrile, and a mixing ratio of the resin to 100 parts by weight of slaked lime is 70 parts by weight. More (in terms of solids), (c) the mixing ratio of the inorganic pigment to 100 parts by weight of slaked lime is 1 to 15
An architectural coating composition which is 0 parts by weight (solid basis). 2. 2. The architectural coating composition according to 1, wherein the acrylic resin is a homopolymer or a copolymer formed from (meth) acrylic acid or an ester thereof. 3. 3. The architectural coating composition according to 1 or 2, wherein the inorganic pigment is at least one white pigment selected from the group consisting of titanium oxide, zinc white, lithopone, zinc sulfide and antimony white, preferably titanium oxide. 4. 4. The architectural coating composition according to any one of 1 to 3, wherein the composition does not contain a fiber material. 5. 1 to 4 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. 6. 6. The architectural coating composition according to any one of 1 to 5, which has a viscosity of 300 to 8000 centipoise at room temperature. 7. (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 1 to 6, 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, an acrylic resin, an inorganic pigment and water as main components.

The slaked lime used in the present invention is usually
Especially if it is used as a component of plaster wall material
Not restricted. For example, industrial slaked lime (for example, JIS A6
902) and various types of hydroxy
Calcium iodide can be used. Processing such as coloring
Slaked lime that has been treated can also be used. The grain
The diameter is not particularly limited, and is usually used as industrial slaked lime.
In addition to the particle size to be formed, the design (texture) of the formed coating film
Depending on the particle size, it is possible to optionally use one having a smaller particle size.
it can. In addition, calcium hydroxide which is the main component of slaked lime
Is CO in the air _TwoInfluence of gas on calcium carbonate
A part of the slaked lime or
It is also possible to use calcium carbonate instead of all
Included in the range.

The proportion 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. Specifically, the solid content of the coating composition is 100
It can be appropriately selected from a range where the blending ratio per weight% is 30 to 58 weight%. For example, 30-5
5% by weight, or a range of 35 to 50% by weight.

The acrylic resin referred to in the present invention is:
(Meth) acrylic acid, (meth) acrylic acid ester,
It means a resin prepared by using (meth) acrylamides and (meth) acrylonitrile as main raw materials (monomer components) alone or by copolymerization with each other or with another resin (monomer components). Specific examples of such monomer components are not particularly limited as long as they are included in each of the above categories and are commercially available.

Preferably, (i) acrylic acid or methacrylic acid: (ii) acrylate or methacrylate:
For example, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, hexyl acrylate, n-octyl acrylate, 2-acrylic acid The alkyl group such as ethylhexyl, lauryl acrylate, stearyl acrylate, palmityl acrylate or cyclohexyl acrylate has 1 to 18 carbon atoms.
Alkyl acrylate; methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-methacrylate
Butyl, isobutyl methacrylate, t-methacrylate
-Butyl, hexyl methacrylate, n-methacrylate
-Octyl, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, palmityl methacrylate, cyclohexyl methacrylate and the like, wherein the alkyl group has about 1 to 18 carbon atoms; Hydroxyethyl acid,
Alkyl esters having a hydroxyl group in the side chain of (meth) acrylic acid, such as hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate; methoxybutyl acrylate, methacrylic acid Methoxybutyl, methoxyethyl acrylate, methoxyethyl methacrylate, ethoxybutyl acrylate,
Alkyl esters having an alkoxyl group in the side chain of (meth) acrylic acid such as ethoxybutyl methacrylate; alkenyl esters of (meth) acrylic acid such as allyl acrylate and allyl methacrylate; allyloxyethyl acrylate and allyloxyethyl Alkenyloxyalkyl esters of (meth) acrylic acid such as methacrylate; 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 Diethylaminoethyl acrylate, diethylaminoethyl methacrylate,
Mono- or di-alkylaminoalkyl esters of (meth) acrylic acid such as methylaminoethyl acrylate and methylaminoethyl methacrylate; a silyl group as a side chain;
(Iii) Acrylamides or methacrylamides: for example, acrylamides or methacrylamides; N-methylol acrylamide, N-methylol methacrylamide and the like, having an alkoxysilyl group or a hydrolyzable alkoxysilyl group. (Meth) acrylamide having a methylol group as described above; N-alkoxymethylolacrylamide (for example, N-isobutoxymethylolacrylamide and the like);
And N-alkoxymethylol methacrylamide (for example, N-isobutoxymethylol methacrylamide and the like)
(Meth) acrylamide having an alkoxymethylol group, such as N-butoxymethylacrylamide and N
(Iv) Various acrylic monomers such as (meth) acrylamide having an alkoxyalkyl group such as butoxymethyl methacrylamide, and (iv) acrylonitrile and methacrylonitrile.

These acrylic monomers can be used alone or in any combination of two or more. That is, the acrylic resin used in the present invention may be, for example, a homopolymer composed of one of the various monomer components exemplified above alone, or any combination of two or more of the various monomer components exemplified above. May be used. Further, the acrylic monomer can be arbitrarily combined with other monomer components to form a copolymer, and the acrylic resin of the present invention includes the copolymer. The monomer component used in combination with the acrylic monomer is not particularly limited as long as it forms a copolymer with the acrylic monomer, for example, vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, Vinyl butyrate, vinyl pivalate, V-acid (versatic aci)
d) vinyl monomers such as vinyl and vinyl benzoate,
Butadiene, styrene and the like can be mentioned. Specific examples of such a copolymer include styrene / acrylic esters, styrene / acrylonitrile, and styrene / acrylamide / ethyl acrylate.
Acrylic copolymer, vinyl acetate / acrylic copolymer such as vinyl acetate-acrylic acid ester and vinyl acetate-methacrylic acid ester, butadiene / acrylic copolymer such as butadiene-acrylonitrile, vinyl chloride / acrylic copolymer, vinylidene chloride / Acrylic copolymer, VEOBA /
An acrylic copolymer can be exemplified. The acrylic resin of the present invention further includes an acrylic-modified alkyd resin, an acrylic-modified vinyl acetate / vinyl chloride copolymer resin, a fluorine-modified acrylic resin, and the like.

The acrylic resin used in the present invention is preferably a homopolymer or a copolymer prepared by mixing the above acrylic monomers alone or arbitrarily mixing two or more of them, and a silicone-modified acrylic resin (acrylic resin). Silicone resin). More preferred are a homopolymer or copolymer of (meth) acrylic acid or an ester thereof, and a silicone-modified acrylic resin (acrylic silicone resin). The silicone-modified acrylic resin (acrylic silicone resin) includes a silicone-modified (meth) acrylic ester having a silyl group, an alkoxysilyl group, a hydrolyzable alkoxysilyl group, or the like as a side chain, as well as those prepared as a monomer component. ,
Examples include those in which silicon and acrylate are combined, those in which both are block copolymerized, those in which silicon is partially modified with acryl, those in which silicon and acrylate are crosslinked with another crosslinking agent, and the like.

The type, amount and degree of polymerization of the above-mentioned acrylic monomer and various monomer components used in combination with the acrylic monomer are determined by the operating temperature (curing temperature) of the obtained coating composition of the present invention. ) And slaked lime, taking into consideration the compatibility with other components of the coating composition and the like, and are appropriately selected, for example, using the glass transition point (Tg) of the obtained resin as a guide. For example, there is no particular limitation on the acrylic resin used in the case of preparing as a room temperature drying type paint, but a resin having a glass transition point of about −100 to + 30 ° C. can be selected. The acrylic resin used in the case of preparing as a forced-drying paint (for example, drying temperature: 50 to 200 ° C.) is not particularly limited,
Those having a glass transition point in the range of +30 to 100 ° C can be selected.

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

The form of the acrylic 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. May be adopted. 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 acrylic resin used in the present invention increases the adhesive strength between slaked limes 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. 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 acrylic resin is determined by the performance required as an aqueous paint such as storage stability, coating workability and film formability, preferably at least two paints specified in JIS K 5663-1995 described later. There is no particular limitation as long as the range satisfies the properties, and it can be appropriately determined according to the type of acrylic resin used. Specifically, it can be blended at a ratio of more than 70 parts by weight (solid basis) with respect to 100 parts by weight of slaked lime. More specifically, for example, more than 70 parts by weight (for example, 71 parts by weight) 20
0 parts by weight or less, preferably more than 70 parts by weight and 150 parts by weight or less, more preferably more than 70 parts by weight and 90 parts by weight or less.

In the present invention, in addition to the slaked lime and the acrylic resin, a pigment (white pigment, colored 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, waterproofing agents, 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, antimony white, lead white, and zirconia; black pigments such as carbon black and iron oxide: cadmium red, red iron oxide, and molybdenum red. And red pigments such as lead red: yellow (chrome yellow), titanium yellow,
Yellow pigments of cadmium yellow, yellow iron oxide, tan, antimony yellow, vanadium tin yellow, vanadium zirconium yellow: green pigments such as chromium oxide, viridian, titanium cobalt green, cobalt green, cobalt chrome green, and Victoria green: ultramarine, navy blue, Various colored pigments such as a blue pigment such as cobalt blue, cerulean blue, cobalt silica blue, and cobalt zinc silica blue can be exemplified.
The proportion of the pigment to be blended in the coating composition of the present invention is not particularly limited, and the desired hiding power and color (brightness, chromaticity, saturation) are desired.
Can be selected and adjusted as appropriate.

Preferred among the inorganic pigments are white pigments such as titanium oxide, zinc white, lithopone, zinc sulfide and antimony white. Titanium oxide is preferable from the viewpoint of hiding power and coloring power. However, it should be understood by those skilled in the art that a white pigment having a hiding power or coloring power equivalent or similar to titanium oxide can be optionally used in place of titanium oxide or in combination with titanium oxide without being particularly limited thereto. It is easy to imagine. Examples of such white pigments include, but are not limited to, lithopone, zinc sulfide, and zinc white.

In general, the rutile type titanium oxide is more excellent in light resistance and hiding power than the anatase type. However, in the present invention, it does not matter whether the titanium oxide is rutile type, anatase type or brookite type. Any of these can be used. The particle size and shape are not particularly limited, and can be appropriately selected from commercially available products according to the purpose. Generally, titanium oxide has a particle size of 0.1
Approximately 0.5 μm or approximately 0.01 to 0.05 μm
m ultrafine particles, plate-like titanium oxide for ultraviolet absorption, and the like are known. From the viewpoint of hiding power, although not limited, 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.

The mixing ratio of the inorganic pigment such as titanium oxide is 1 to 150 parts by weight, preferably 1 to 100 parts by weight, more preferably 2 to 100 parts by weight based on 100 parts by weight of slaked lime.
The range is 50 parts by weight, more preferably 2 to 30 parts by weight.

In order to improve the hiding power of the inorganic pigment, an extender pigment can be used in combination. The extender is not limited, but may be talc, kaolin clay, aluminum hydroxide, calcium carbonate (heavy calcium carbonate, precipitated calcium carbonate),
Bentonite, barium sulfate (precipitable barium sulfate, barite powder), white carbon, silica and the like can be mentioned. These extenders may be used alone or in any combination of two or more. Among them, preferred extenders are calcium carbonate,
Talc or white carbon.

The coating composition of the present invention prepared by blending an inorganic pigment such as titanium oxide in the above-described ratio with a coating composition containing slaked lime as a main component can conceal the surface to be coated with a smaller coating amount. In addition, a coating film formed with such a small amount of paint has a desired appearance and physical properties in spite of being a thin coating film, and can exhibit functions such as humidity control and anti-condensation. .

Such a coating film can be achieved by using at least 100 g, preferably at least 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 to 800 g, 100 to 500 g,
Various ranges such as 150 to 400 g and 200 to 300 g can be selected.

The coating composition of the present invention can have a higher coating film hiding power than 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 that makes it impossible to determine the black and white of the base when observed with the naked eye through the formed coating film is 1 mm
Or less, preferably 500 μm or less, more preferably 30 μm or less.
0 μm or less, more preferably 200 μm or less, and even 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 mineral materials such as bentonite, gibbsite, mica, ceramic sand, glass beads, pearlite, acid clay, pottery stone, dolomite, 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.
2 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 blended in a paint can be widely used. For example, formalin condensate of sodium alkylnaphthalenesulfonate,
Examples thereof include low molecular weight ammonium polyacrylate, low molecular weight styrene-ammonium maleate copolymer, 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, but are usually 0.05 to 5 with respect to 100 parts by weight of slaked lime.
The range of parts by weight, especially the range of 0.1 to 4 parts by weight can be exemplified.

The defoaming agent is not particularly limited as long as it is usually used by being blended with 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 waterproofing agent is not particularly limited, but examples thereof include silicone oil, silicone resin, and organoalkoxysilane. According to these components, generally, the waterproofness, chemical resistance, weather resistance, and the like of the coating film can be improved.However, in the present invention, it is possible to use the coating film within a range that does not hinder the desired humidity control property required for the coating film. preferable.

The coating composition of the present invention contains slaked lime in an amount of 30 to 58% by weight, preferably 30 to 55% by weight, more preferably 35 to 50% by weight, in terms of solid weight, based on solid content.
20 to 60% by weight, preferably 20 to 45% by weight, more preferably 20 to 30% by weight of the acrylic resin.
% By weight; 0.3 to 4 inorganic pigments such as titanium oxide
5% by weight, preferably 0.3 to 30% by weight, more preferably 0.6 to 15% by weight, still more preferably 0.6 to 5% by weight.
It is preferred that the content be in the range of 9% 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.
It is preferable that the composition is adjusted so as to be 50% 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, An acrylic resin, a pigment, and the like can be stably dispersed in water to prepare a paint 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 30 at room temperature so as to be suitable for brush coating, roller coating, spray coating or coat coating.
0-8000 centipoise, preferably 500-500
0 centipoise, more preferably 1000 to 4500 centipoise, and still more preferably 2000 to 4000 centipoise. The viscosity of the putty-like coating composition is not limited, but may be room temperature (25
(° C. ± 5) in the range of 8,000 to 30,000 centipoise, preferably 8,000 to 20,000 centipoise.

The coating composition of the present invention can be used for coating interior and exterior surfaces such as ceilings and walls (inner and outer walls) of various buildings, and for building ceilings, roofs and walls (inner and outer walls). It can be used for painting various building materials (cloths, panels, boards) used as base materials and decorative materials. 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 contains JI
When measured according to the method of JIS K5400 according to the provisions of SK 5663-1995, at least the following quality (JIS K 5663-199)
The architectural coating composition having 5) is included: (1) State in a container: When stirred, there is no lump and the whole contents are uniform: (2) Painting workability: Painting with two coats No problem in operation: (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: 0.95 or more Furthermore, the coating composition of the present invention has a water resistance (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 concealment ratio was 0.93 or more (5.8 in JIS K 5663-1995), and the weather resistance (9.9 in JIS K 5400) showed no swelling, peeling or cracking after a 12-month test period. The degree of chalk is not large compared to the sample (JIS K 56
It is preferable to meet the requirement of 5.13) of 63-1995.

[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, a roof or a wall (inner / outer wall) of a building. And various building materials used as decorative materials, such as cloths, boards and panels. The surface of such a base material (building material) 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.
It may be any of cardboard and cardboard, and includes, for example, flame-retarded paper suitable for wallpaper application, such as flame-retardant lined 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. The above materials may be used alone or in any combination of two or more.

Examples of the board and panel include a wide range of board 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 acrylic 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 1 mm or less as described above, preferably 500 μm.
m or less, more preferably 300 μm or less, still more preferably 200 μm or less, and still more preferably 100 μm or less.
It is characterized in that it can be prepared as follows. Therefore, the thickness of the coating film is at least 1 mm, preferably at least 500 μm, more preferably at least 300 μm, even more preferably at least 200 μm.
m, and more preferably at least 100 μm in thickness. However, in view of the physical properties and functions of the coating film such as cost, coating workability and film formability, and humidity control, it is usually 0.1 to 5 mm. , Preferably 0.1 to 3 m
m, more preferably 0.2 to 2 mm, still more preferably 0.3 to 1.5 mm, and still more preferably 0.5 to 1
The range of mm can be exemplified. 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 exhibits moisture control (hygroscopic and desorbing properties) and dew condensation preventing effects, and also has a texture (color, gloss, and fineness) peculiar to stucco. Appearance and texture). 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. , Gloss 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.

In addition, this is construction material construction (interior / 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, it is possible to avoid the application of the building material with the adhesive.

(3) Method for Construction Interior / Exterior Construction The present invention further relates to a construction method for interior / exterior construction of a building using the above-mentioned coating composition or 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 method for applying the interior and exterior of a building according to the present invention includes a method of applying and laminating the above-mentioned coating composition of the present invention directly on a base material (a base material for inner and outer walls) of an inner / outer wall of a building, a roof or a ceiling, And the building materials of the present invention (cloths, panels,
Board) is attached or arranged.

Specifically, the coating method according to the present invention is carried out by directly or after applying a sealer or primer treatment to the surface of a base material (base material) for the inner and outer walls of a building, a roof or a ceiling, The viscosity at room temperature (25 ± 5 ° C.) is suitably 300 to 8000 centipoise, and preferably 500 to
5000 centipoise, more preferably 1000 to 45
By applying a coating composition of 00 centipoise, drying at room temperature or ventilation until solidified, and then, if necessary, polishing and polishing the surface of the coating layer laminated on the inner and outer wall base material. it can.

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, and the like. 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 base such as wood fiber board and particle board; plastic base made of vinyl resin such as vinyl chloride resin and vinyl acetate; and other various metal bases. Further, the building base material targeted by the present invention may be one in which a cloth is stuck or various paints are applied. That is, according to the coating composition of the present invention, it is possible to renovate the inner and outer walls and ceiling of a building by applying and applying the cloth and the painted surface.

The construction method of the present invention is based on the inner and outer walls of a building,
The painted material (building material such as cloth, panel, board, etc.) of the present invention is applied to a base material (base material) of a roof or a ceiling or an inner / outer wall frame or a lower crossbar provided on the base material (base material). A step of abutting 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 30.
0 to 8000 centipoise, preferably 500 to 500
The coating can be carried out by applying a coating composition of 0 centipoise, more preferably 1000 to 4500 centipoise, drying until solidified, and then, if necessary, polishing and polishing the surface of the coating layer region.

When the interior and exterior panels are used as a building material, there is no particular limitation on the manner in which the panels are connected, but an example is the 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 in the joint portion of the panel as shown in FIGS. 2B and 2C, the same as the coating composition applied to the groove portion of the joint before the application of the coating composition. High viscosity (low water content) coating composition, suitably 8000-20,000 centipoise at room temperature, preferably 8
It is preferable to fill a coating composition having a viscosity of 000 to 10,000 centipoise as a sealing material, and then apply a coating composition having a viscosity of 300 to 8000 centipoise at room temperature. 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 can be used as they are or by applying a filling paint, resin, or the like to them. 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, especially at the joint of building materials such as cloths and panels, the joints are not conspicuous, and the surface of the building materials is substantially uniform or continuous by the coating or polishing shearing in the finishing step. It is possible to provide interior and exterior with good appearance.

(4) Method for Restoring Building Interior / Exterior The present invention also relates to a method for 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, an acrylic resin, an inorganic pigment, and water, comprising: ) 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.

[0069]

The coating composition of the present invention, even though it is a water-based coating, can exhibit functions such as humidity control and dew condensation prevention by containing slaked lime. For this reason, walls where moisture is a problem in buildings, especially apartments,
It is extremely useful as a paint for interiors such as ceilings and indented inner walls or as a paint for building materials. In addition, the coating composition of the present invention particularly containing an inorganic pigment such as titanium oxide as a pigment,
It has excellent hiding power at a low coating amount without impairing humidity control properties, and also has excellent adhesion and film forming properties (yield, crack resistance, flexibility and appearance), so it can be controlled at low cost. A thin coating film having a useful function such as wetness can be formed. In addition, the coating composition of the present invention can provide adhesiveness and film forming properties (yield, crack resistance, (Flexibility, toughness), thereby further simplifying the painting operation.

The paint composition of the present invention is a one-pack type paint containing slaked lime as a main component, and at least two types of synthetic resin emulsion paints (indoor paints) specified in JIS 5663-1995, and one Seed (outdoor paint) quality can be provided. 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 using are paints (interior / exterior paints) and interior / exterior paints that are friendly to humans (buildings).
It is useful as an exterior building material (wall material, roof material, ceiling material).

The coating composition of the present invention is a coating composition having a very high commercial value in terms of low cost, easiness 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.

[0072]

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 34.0 (100.0%) Acrylic resin emulsion (Asahi Kasei) 55.0 (76.5%) Titanium oxide (EP-498, Dainichi Seika) 5.0 (14.7%) Defoamer (KM-70) 0.7 dispersant 0.8 water remaining amount 100.0 parts by weight The above components are put into a paint mixing mixer and stirred to stably disperse solids and resin components in water. A one-component aqueous coating composition of the present invention (solid content: about 66.5%, slaked lime: 51.1% by weight (solid basis)) was prepared. The acrylic resin emulsion (polyacrylate) used contained a solid content of 47.5% by weight. In the above formula, the value in parentheses is 1 for slaked lime.
It shows the mixing ratio of the acrylic resin emulsion (solid content) and titanium oxide when the content is set to 00% by weight (the same applies to the following examples).

Example 2 Slaked lime 28.0 (100.0%) Acrylic resin emulsion (Asahi Kasei) 55.0 (92.8%) Titanium oxide (EP-498, Dainichi Seika) 10.0 (35.6%) Thickener ( SP-600, Daicel Chemical) 0.1 Antifoaming agent (KM-70, Shin-Etsu Chemical) 0.7 Dispersant 0.8 Leveling agent 1.4 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-pack type aqueous coating composition of the present invention (solid content: about 67%, slaked lime: 41.6% by weight (solid basis)) ) Was prepared. The acrylic resin emulsion (polyacrylate) used contained a solid content of 47.3% by weight.

Example 3 Slaked lime 20.0 (100.0%) Acrylic resin (Asahi Kasei) 30.0 (150.0%) Titanium oxide (EP-498, Dainichi Seika) 8.0 (40.0%) Defoamer (KM -70, Shin-Etsu Chemical) 0.5 Dispersant 0.5 Extender pigment 3.0 Water Residual total amount 100.0 parts by weight The above components are put into a paint mixing mixer and stirred to remove solids and resin components from water. To obtain a one-pack aqueous coating composition of the present invention (solid content: about 62%, slaked lime: 32.3% by weight (solid basis)). The acrylic resin (polyacrylate) used was a re-emulsifying powder resin.

Example 4 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) 800 g / m ² ,
A dried coating film (0.5 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 a coating layer on a wall base material with a nail as an interior wall material in a room. The nail head is nailed until it sinks into the inside of the coating layer, and the nail head recess formed by this is slightly hardened by adding water to a composition comprising slaked lime, an acrylic resin emulsion (polyacrylate) and a thickener. And a kneaded putty-like coating material (viscosity: 8,000 centipoise) was inserted and filled, and after solidification, the coating composition of Example 1 was applied again to the nailed portion and its peripheral portion to finish. 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.

[0078]

[Table 1]

(2) Dry Film Strength The test plate prepared above was tested according to the pencil scratch value measurement method (hand scratch method) specified in JIS K5400-1990 8.4 to evaluate the strength of the coating film. 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 (length 40 cm × width 25 cm × thickness 5 mm), solidified by ventilation drying, and coated. A panel having a thickness of 0.6 mm was prepared.

A humidity control test was performed using six samples of the panel. 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.

[0083]

[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 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 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
0 to 13 mml / sheet), and after 6 hours, a second brush coating (coating amount: 9 to 11 mml / sheet) is performed, and the coating workability is determined based on the difficulty of carrying the brush when applying the second time. evaluated. 2
When it is not difficult to carry the brush when applying the second time, the evaluation is "good" as "two coats do not hinder the painting work",
“Normal” and “Poor” were sequentially determined according to the difficulty of brush transfer.

(3) Stability at low temperature (5.5 of JIS K5663-1995) The 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 in 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.

[0092]

(Equation 1)

(7) Alkali resistance (5.1 of JIS K5663-1995)
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 pieces (2 sheets) used in the above (7) Alkali resistance test, 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.

[0098]

[Table 3]

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

[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 symbols]

 1. 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)

Claims (13)

[Claims] 1. A coating composition containing slaked lime, an acrylic resin, an inorganic pigment and water, wherein (a) the proportion of slaked lime is 30 to 58% by weight (in terms of solids), and (b) the acrylic resin is At least one selected from the group consisting of (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylamides and (meth) acrylonitrile
(C) a homopolymer or a copolymer containing a seed as a monomer component, wherein the mixing ratio of the resin to 100 parts by weight of slaked lime is more than 70 parts by weight (as solid);
The mixing ratio of the inorganic pigment to 100 parts by weight of slaked lime is 1 to
An architectural coating composition which is 150 parts by weight (solid basis). 2. The architectural coating composition according to claim 1, wherein the acrylic resin is a homopolymer or a copolymer formed from (meth) acrylic acid or an ester thereof. 3. The building according to claim 1, wherein the inorganic pigment is at least one white pigment selected from the group consisting of titanium oxide, zinc white, lithopone, zinc sulfide and antimony white, preferably titanium oxide. Paint composition. 4. The architectural coating composition according to claim 1, which does not contain a fiber material. 5. The architectural coating composition according to claim 1, wherein the hiding power of the dried coating film is 500 μm or less. 6. The architectural coating composition according to claim 1, which has a viscosity of 300 to 8000 centipoise at room temperature. 7. 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 6, which satisfies at least two kinds of paint properties specified in K 5663-1995. 8. A coated article having a coating film formed from the coating composition according to claim 1. 9. The coated article according to claim 8, which is a building material. 10. 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. 11. The coating according to any one of claims 1 to 7, wherein (i) a step of arranging a plurality of the building materials according to claim 9 on 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. 12. The method according to claim 9, wherein (i) the building base material or the base material is used.
A process of connecting a plurality of the listed building materials, (ii) if necessary,
A step of filling or applying the coating composition according to any one of claims 1 to 7 to a joint of each building material, (iii) a step of covering the joint with a reinforcing member, and (iv) a step of covering the reinforcing member. 1
A method for applying a coating composition according to any one of claims 1 to 7, and drying, and (v) a step of polishing and polishing the coating film surface as necessary. 13. A method for repairing a damaged portion of an interior / exterior surface of a building having a coating layer formed on the surface thereof by applying the coating composition according to any one of claims 1 to 7, (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 according to any one of claims 1 to 7 to the damaged wall surface, 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.