JP2003292868A - Aqueous alga-proofing or mildew-proofing coating and its applying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous alga-proofing or mildew-proofing coating which can be applied on an exterior member of a building suffering from advanced biocontamination by propagation of algae or mildew economically in a few steps and in a short time thereby to easily repair a biocontaminated part, and a method for applying the same. <P>SOLUTION: The aqueous alga-proofing or mildew-proofing coating for an exterior member of a building mainly composed of a synthetic resin latex is obtained by compounding 0.01-10 pts.wt. of an alga-proofing agent or a mildew- proofing agent and 0-5 pts.wt. of a thickener with 100 pts.wt. of the resin solid content, and adjusting the resin solid content concentration to 1-30 wt.%. The method for applying the aqueous alga-proofing or the mildew-proofing coating comprises substantially removing algae or mildew sticking to the surface of the exterior member of a building suffering from advanced biocontamination by propagation of algae or mildew, washing and drying the surface, and applying the aqueous alga-proofing or mildew-proofing coating on the surface thereby forming a transparent coating film. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water-based algae control (mold).
For more details on paint and its application method, see
Water-based algae (mold) paint and its application that can be applied economically to the exterior parts of buildings where molds have propagated and biological pollution is progressing in a short time and economically, and can easily repair biologically contaminated parts. Regarding the method.

[0002]

2. Description of the Related Art In a building such as a house, the surface of the exterior member is painted to protect it from deterioration due to wind, rain, light, and heat. However, the surface of the exterior member is discolored, chalked, soiled, and biologically polluted (algae). -It is widely known that deterioration and trouble phenomena such as generation of mold etc. occur.

[0003] Among them, unlike other phenomena, biological pollution does not occur on the entire surface of the exterior member, the temperature and humidity are high without the sun, and it is suitable for a growing environment of damp algae and molds. It often breeds in some parts (mostly on the north side).

Conventionally, when a defect occurs in such a building exterior member, the entire surface of the exterior member is repainted or the biologically contaminated portion is cleaned. However,
To completely repaint building exterior materials such as outer walls, temporary scaffolding, scatter curing, water washing, ground polishing, rust prevention must be applied before painting, and scaffolding is removed after painting. For example, it took about 1 week to mobilize 3 to 4 people, and it cost about 1 million yen.

Up to now, even in the case of biological contamination that has occurred on a part of the exterior member, is it necessary to carry out a large-scale repainting as in the above case?
I had to deal with it by cleaning. When cleaning a biologically contaminated area, a diluting solution of an algae-proofing agent or a fungicide was sprayed in order to delay the recurrence of biological contamination, but this agent had little retention and was washed away by rain. After that, we could not expect anti-algae and anti-mold effects.

Further, Japanese Patent Laid-Open No. 9-235491 discloses that
We have proposed a solvent-based fluorinated paint containing an algae control agent, but if this is applied to the exterior walls of buildings, etc., an algae control effect can be expected.
Since an organic solvent is used, the paint has a solvent odor, which is not preferable in the work environment. Further, when the base coating film is a coating film having a high solubility in a solvent such as an acrylic resin, there is a problem that the base coating film is dissolved and gloss is lost.

In addition, when an algae-proof (mildew) paint is applied to a building exterior member whose base is low in gloss, the gloss may be high only in the applied portion, and the appearance may be uncomfortable. Under such circumstances, the advent of a water-based algae (mold) paint that can be applied only to a portion of a building exterior member to be repaired and can be repaired without manpower or expense has been desired.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to be able to apply economically to a building exterior member in which algae and fungi are propagated and biological pollution is progressing in a short time and with a small number of steps, resulting in biological pollution. An object of the present invention is to provide a water-based anti-algae (mildew) paint that can be easily repaired and a method for applying the same.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies in view of the above problems, and as a result, have compounded a synthetic resin latex with a specific amount of an anti-algal agent or anti-fungal agent and, if necessary, a thickener. Then, by preparing a water-based anti-algae (mold) paint with a resin solid content of a specific concentration and applying this thinly on the parts of the building exterior member where algae and mold had propagated, delay their growth, The present invention has been completed by finding that workability can be greatly improved.

That is, according to the first aspect of the present invention,
A water-based anti-algae (mold) paint containing a synthetic resin latex as a main component for building exterior members, which comprises 0.01 to 10 parts by weight of an anti-algae or anti-mold agent with respect to 100 parts by weight of resin solids, And 0 to 5 parts by weight of a thickening agent, and adjusting the resin solid content concentration to 1 to 30% by weight.

According to the second aspect of the present invention, the first aspect
The invention further provides a water-based anti-algae (mildew) paint, characterized in that 0.1 to 30 parts by weight of a matting agent is added to 100 parts by weight of the resin solid content.

On the other hand, according to the third aspect of the present invention, the first aspect
Alternatively, in the invention of 2, the algae / mold attached to the surface of the building exterior member where the algae / mold is proliferating and biological pollution is progressing.
After substantially removing molds, washing with water and drying,
There is provided a method for applying a water-based anti-algae (mold) coating, which comprises applying a water-based algae-proof (mold) coating on the surface to form a transparent coating film.

According to the fourth aspect of the present invention, the third aspect
In the invention, when the coating is applied to a portion of the building exterior member that does not require application, or when the coating drips from the applied portion, the water-based anti-algae characterized by quickly wiping off the coating of the portion ( A method of applying a mold) paint is provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The water-based anti-algae (mold) coating material (hereinafter, also simply referred to as coating material) of the present invention and its coating method will be described in detail below.

1. Aqueous algae (mold) coating The aqueous algae (mold) coating of the present invention comprises a synthetic resin latex as a binder in which a specific amount of an algae-proofing agent or a mildew-proofing agent is added, and a thickener is added, if necessary. The solid content concentration is adjusted to a specific range. The synthetic resin latex is not particularly limited, but a resin synthesized by condensation reaction or addition polymerization can be mentioned.

As the resin synthesized by the condensation reaction,
Epoxy resin, phenol resin, urea resin, urea melamine resin, amino resin, alkyd resin, phthalic acid resin, fatty acid modified phthalic acid resin, phenol modified phthalic acid resin,
An unsaturated polyester resin, a polyurethane resin, an aldehyde resin, a ketone resin, etc. are mentioned.

As the resin synthesized by addition polymerization, acrylic resins such as polyacrylic acid ester and polymethacrylic acid ester, copolymers thereof; acrylic-styrene copolymers, acrylic-vinyl acetate copolymers, Vinyl acetate resins such as acrylic-vinyl chloride copolymer, acrylic-ethylene copolymer, polyvinyl acetate, vinyl acetate-vinyl chloride copolymer, vinyl acetate-ethylene copolymer, vinyl acetate-styrene copolymer; Vinyl chloride resins such as vinyl chloride, vinyl chloride-acrylic copolymers, vinyl chloride-ethylene copolymers, vinyl chloride-styrene copolymers; polyvinylidene chloride, vinylidene chloride resins such as their copolymers; polyethylene, polypropylene, polystyrene , Hydrocarbon resins such as polyisobutylene, fluororesins, and silicone resins.

In addition to these, synthetic resins modified with inorganic components such as ceramic-modified fluororesin, ceramic-modified urethane resin and ceramic-modified acrylic resin; urethane / acryl, epoxy / acryl, silicone / acryl, polyester / acryl, Fluorine resin / acrylic, colloidal silica / acrylic, nitrocellulose /
A composite emulsion containing two or more different polymers such as acrylic and melamine resin / acrylic in the particles can be used.

Among the above-mentioned resins, in consideration of adhesion to the base coating film (old coating film), weather resistance and water resistance, acrylic resins such as polyacrylic acid ester and polymethacrylic acid ester, and copolymers thereof. Acrylic-styrene copolymers, polyurethane resins, epoxy resins, phthalic acid resins, fluorine resins and the like are preferable.

Further, since a water-based paint that takes into consideration the surrounding work environment is used instead of a solvent-based paint, it does not pollute the environment with a bad odor at the time of work and does not dissolve the underlying coating film. Can be painted without waking it up.

The algal and / or antifungal agents are not particularly limited, but include, for example, 2-n-octyl-4-isothiazolin-3-one and 5-dichloro-2-n-octyl-4.
-Isothiazolin-3-one, 1,2-benzisothiazolin-3-one, Nn-butyl-1,2-benzisothiazolin-3-one and other isothiazoline-based compounds; 3-
(3,4-Dichlorophenyl) -1,1-dimethylurea (DMU), 3- (3,4-dichlorophenyl) -1
-Methyl-1-methoxyurea, 3- (3,4-dichlorophenyl) -1- (2-methylcyclohexyl), 3-
Phenyl-1- (2-methylcyclohexyl) urea, 3
Urea compounds such as-(phenyldimethylmethyl) -1- (4-methylphenyl) urea; 2-chloro-4,6-bis (ethylamino) -1,3,5-triazine, 2-chloro4
-Ethylamino-6-isopropylamino-1,3,5
-Triazine, 2-methylthio-4,6-bis (ethylamino) -S-triazine, 2-methylthio-4-ethylamino-6-isopropylamino-S-triazine,
2-methylthio-4,6-bis (isopropylamino)
-S-triazine, 2-methylthio-4-t-butylamino-6-cyclopropylamino-S-triazine,
Triazines such as N'-t-butyl-N-cyclopropyl-6- (methylthio) -1,3,5-triazine-2,4-diamine; tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetraisopropylthiuram. Thiuram disulfides such as disulfide, dipyrrolizol thiuram disulfide, polyethylene thiuram disulfide; benzimidazoles such as 2- (4-thiazyl) benzimidazole and 2- (carbomethoxyamino) benzimidazole;
Pyridines such as 2,3,5,6-tetrachloro-4- (methylsulfonyl) pyridine; zinc pyrithione such as zinc-2-pyritinthiol-1-oxide; 2
Thiazole-based compounds such as-(4-thiocyanomethylthio) benzothiazole; organic halogen-based, organometallic-based, haloalkylthio-based, and phenylphenol-based algaecides or fungicides.

These algae-proofing agents or fungicides may be added alone to the synthetic resin latex, or two or more kinds may be added in combination. Preferably, a drug having a high antifungal effect such as isothiazoline and a drug having a high antialgal effect such as triazine and pyridine are blended and blended. The mixing ratio is not particularly limited, but is 20 to 80: 8 by volume ratio.
0-20, especially 40-60: 60-40 are preferable.

The total amount of the algae-proofing agent or fungicide added is 0.01 to 10 parts by weight, preferably 0.05 to 8 parts by weight, based on 100 parts by weight of the resin solid content. If the amount is less than 0.01 parts by weight, the algae control effect cannot be expected, and if the amount is more than 10 parts by weight, the weather resistance is deteriorated and discoloration due to aging occurs, which is not preferable.

Further, if the viscosity of the coating material is low and the fluidity thereof is high, dripping occurs during application, so a thickener can be added to the above synthetic resin latex. Examples of the thickener include polyvinyl alcohol, sodium polyacrylate, polypinylpyrrolidone, styrene-maleic acid copolymer, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxylic acid copolymer, and the like, and used alone. Also, two or more kinds may be blended. The addition amount of the thickener is 0 to 5 parts by weight, preferably 0 to 4 parts by weight, based on 100 parts by weight of the resin solid content. If it is more than 5 parts by weight, the water resistance is lowered, which is not preferable.

The water-based anti-algae (mold) coating composition of the present invention may further contain a matting agent to impart a matting effect to the coating forming a transparent film.

As the matting agent, synthetic resin beads; calcium carbonate, clay, talc, mica powder, barite, silica powder, diatomaceous earth, calcium silicate, synthetic aluminum silicate, glass beads, or inorganic oxidation such as shirasu balloon Examples include physical beads. Synthetic resin beads
An acrylic resin such as polyacrylic acid ester or polymethacrylic acid ester, a copolymer thereof, an acrylic-styrene copolymer, a polystyrene resin, a polyethylene resin, or the like. The matting agent is preferably synthetic resin beads from the viewpoint of weather resistance, compatibility with a coating film, transparency and the like.

The matting agent is added in an amount of 0.1 to 30 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the resin solid content.
25 parts by weight. When the base coating film has a high gloss, it is not necessary to add a matting agent, but it is desirable to add 0.1 part by weight or more. On the other hand, if the addition amount is more than 30 parts by weight, the coating film is not formed and the coating film and the matting agent are easily peeled off, which is not preferable.

The shape of the matting agent is not particularly limited and may be resin-like, scale-like, needle-like, spherical or the like, but spherical is preferable from the viewpoint of coating workability. If the particle size of the matting agent is too small, there is no matting effect, and if it is too large, it tends to peel off from the coating film, so the particle size is set to 1 to 30 μm, more preferably 3 to 20 μm. When a matting agent is added to the coating material of the present invention, even if it is applied to the base of a building material having a low luster, it can be finished while suppressing the luster, so that no uncomfortable feeling is produced with an unpainted cylinder.

In addition to thickeners and matting agents, water-based algae coatings include film forming aids, plasticizers, modifiers, surface conditioners,
A dispersant, a wetting agent, a defoaming agent, an antiseptic agent, an antifreezing agent, an anticorrosive agent, an ultraviolet absorber, a light stabilizer, a crosslinking agent and the like may be added.

The resin solid content concentration of the paint is 1 to 30% by weight, more preferably 1 to 20% by weight. The resin solid content means a non-volatile content of a synthetic resin latex component, and does not include a component such as a paint additive that is solid at room temperature. 1% by weight
When the amount is less than the above range, a coating film is not formed, and the anti-algae and antifungal effect cannot be expected to last long. On the other hand, if it is more than 30% by weight, the thickness of the coating film becomes too thick, which causes a difference in appearance (gloss) from the uncoated portion, which is not preferable.

Conventionally, the resin solid content concentration of repair paint is 3
Although it was 0 to 70% by weight, since the resin solid content concentration was lowered in the coating material of the present invention, a transparent coating film having an extremely thin film thickness can be formed when the synthetic resin coating material is applied.

The production conditions of the above water-based paint are not particularly limited, and it can be produced simply by mixing and dispersing synthetic resin latex, additives and the like using a mixer such as a ball mill.

2. Coating Method The coating method of the coating material of the present invention will be described with reference to FIG. Examples of buildings to which the present invention is applied include detached houses, middle and high-rise buildings, bridges, bridge piers, plants, tanks, and the like. There is no particular limitation as long as it is a building that requires algae-proofing effect, but a large effect can be expected when applied to a detached house.

The present invention is applicable to outer walls, eaves, folded plate roofs, tile roofs,
Seat roof, ridge, keraba, gable, eaves, girder, mall material, foundation, balcony, balcony inner wall, balcony floor, kasagi, handrail, vertical gutter, eaves gutter, rain door, shutter rail, shutter, shutter box, caulking section , Gaskets, sashes, sash rails, screen lattices, entrance doors, self-exiting doors, veranda doors, entrance porch, porch pillars, porch eaves, etc. Widely applied to exterior finishing materials and building exterior finishing. These building exterior members may be one member or may be composed of a plurality of members, and can be applied to the joint portion between the outer wall and the eaves, the outer wall and the sash, and the like.

As the building exterior finish, multi-layer finish, mortar, concrete, PC panel, asbestos slate board, extruded board, wood chip cement board, GRC panel,
Examples thereof include inorganic building materials such as ALC panels, marble and porcelain tiles, metal building materials such as steel, aluminum curtain walls, aluminum sashes, stainless panels, and galvanized steel plates, and FRP building materials.

The portion to which the paint is applied is a building exterior member in which algae and fungi have propagated and biological contamination is progressing. In FIG. 1, in the outer wall 1 of the detached house, a biologically contaminated soil portion 3 is shown. And its periphery (coated surface) 10. In order to apply the paint to such a portion, the alga / mold stains 3 contained in the application surface 10 are substantially removed in advance, washed with water and dried. Substantially means a state in which algae and molds on the coated surface are almost removed, and preferably a state in which they are completely removed.

Examples of algae / mold removal (sterilization) methods include application of a chemical such as a hypochlorous acid compound, cleaning with alcohol such as ethanol, cleaning with hot water, etc., and the method is appropriately selected according to the working environment. After substantially removing algae and mold and washing with water, the surface of the substrate is dried and then the coating material of the present invention is applied.

As a coating method, air spray,
Spray coating such as cold spray, hot spray, airless spray, and aerosol spray; rolling coating such as rollers; coating utilizing electric characteristics such as electrostatic coating; brush coating, spatula coating, tambo coating, etc., working environment The spray coating is preferable because it can form a uniform thin coating film on the exterior member of the building. Since a paint mixed with an anti-algal agent is applied, the anti-algal and anti-fungal effect lasts longer than in the conventional spray of a chemical diluting liquid (algal and anti-mildew are hard to grow for a long time).

The coating method of the present invention is applied to the exterior members of a building in which algae and mold have been generated, but it is not possible to apply it to an unused exterior member of a building in which algae and the like are not generated. Needless to say.

The coating composition of the present invention has a resin solid content of 1 to 3
Since it is 0% by weight, workability is extremely good. The film thickness after coating is not particularly limited, but can be 0.5 to 20 μm, and preferably 1 to 15 μm. Since this is thinner than the conventional film thickness (20 to 200 μm), it is impossible to distinguish the difference between the transparent coating film portion and other portions on the coating surface according to the present invention. Therefore, there is no need to repaint the entire surface of the exterior member including the part that is not biologically contaminated, and it is possible to repair by repairing only the part that is biologically contaminated. is there.

The paint may be applied only to the application surface 10, but when the paint 12 is applied to a portion of the window glass 2 that does not require application (may be a sash or a door), it reaches the base portion 13. A dripping 11 may occur. In such a case, it can be dealt with by quickly wiping with a dry cloth or a damp cloth. As a result, the masking of the opening and the like which has been conventionally required is not required, and even an amateur can easily perform the work, and the workability can be greatly improved.

[0042]

EXAMPLES Next, examples and comparative examples of the coating method using the water-based algae-proof (mold) will be shown, but the present invention is not limited thereto.

Algae control test (ASTM D 5589-9
7)) A paint (sample) is prepared by blending a synthetic resin latex with a predetermined amount of algae-proofing agent (mold) or without blending it with a solvent, and applying it to a filter paper with a bar coater (No. 18). did.
After air-drying, it was cut into a circle with a diameter of 30 mm and immersed in ion-exchanged water for 18 hours, then at room temperature for 2 hours, then at 80 ° C for 2 hours.
It was dried for an hour and used as a test piece. This test piece was attached to the center of the agar medium for algae culture, an algae suspension containing the test strain was sprayed, and cultured at a temperature of 25 ° C. and an illuminance of 1500 lx (light period 12 hours, dark period 12 hours).

After 4 weeks, the algae control efficacy was evaluated according to the following criteria. 0: No algae growth was observed on the test piece. 1: Proliferation of algae is recognized in a portion less than 1/4 on the test piece. 2: Propagation of algae is observed in 1/4 to 1/2 on the test piece. 3: Propagation of algae is observed in 1/2 to 3/4 on the test piece. 4: Propagation of algae is recognized in a portion exceeding 3/4 on the test piece.

The test strain was Protococcus v.
iridis, Chlorococcum echin
ozygotum CCAP213 / 5, Hormid
ium flaccidium CCAP335 / 2
A, Nostoc commune NIES24, O
scillatoria laetevirens N
Algae separated from IES31 and rooftop slate (Chl
orella saccharophila) was adopted.

Antifungal test (according to JIS Z2911 antifungal resistance test method) A test piece coated with a paint was prepared in the same manner as in the above algal control test. This test piece was affixed to the center of a JIS-designated agar medium, sprayed with a mold spore suspension, and cultured at a temperature of 28 ° C.

After 1 week, the fungicidal efficacy was evaluated according to the following criteria. 0: No mold growth was observed on the test piece. 1: Proliferation of mold is recognized in a portion less than 1/4 on the test piece. 2: Mold growth is recognized in 1/4 to 1/2 on the test piece. 3: Mold growth is observed in 1/2 to 3/4 on the test piece. 4: Mold growth is observed in a portion exceeding 3/4 on the test piece.

The test strain was Aspergillus n.
iger IFO 6342, Penicillium
funiculosum IFO 6345, Clado
sporium cladosporioides I
FO6348, Aureobasidium pull
ulans IFO6353, and Gliocladi
um virens IFO6355 was adopted.

Weather resistance (according to 9.8 of JIS K5400) Color difference (Δ) of the test piece (coated plate) after SWOM2000hr.
E) was measured and evaluated. The smaller ΔE is, the better the weather resistance is. Water resistance (according to 8.19 of JIS K5400) The test piece was dipped in ion water, and the appearance of coating after 4 weeks was visually evaluated.・ Workability paint was actually sprayed and sprayed on the outer wall of the building, and defects during construction were evaluated (observation of paint sag, defoaming property, film forming property, and finished appearance, and 60 ° C gloss after film forming) It was measured). -Washability The outer wall of the lysine handle, which is exposed to the north surface outdoors and in which 3/4 or more of the total area is observed to generate algae, was washed to evaluate the ease of removing the algae.

-Sustainability The outer wall exposed to the north side outdoors in the above manner was washed or not washed, and the state after the algae-preventing treatment (one year later) was evaluated according to the following criteria. −: No algae growth is observed on the outer wall ±; Algae growth is observed on less than 1/4 of the outer wall +; Algae growth is observed on 1/4 to 1/2 of the outer wall ++: Propagation of algae is observed in 1/2 to 3/4 on the outer wall +++; Propagation of algae is observed in more than 3/4 on the outer wall

Spraying the wiping paint on the outer wall and applying 3 at 3 ° C and 60% humidity.
After standing for a minute, the appearance after wiping off the surface mist with a damp cloth was compared with that of the area where the paint was not sprayed (visual evaluation and 60 ° C. gloss).

(Examples 1 to 7, Comparative Examples 1 to 3) The water-based anti-algae (mold) paint of the present invention was applied to a test piece to measure the anti-algae and anti-mold effect. The experiment was carried out by changing the resin solid content concentration of the paint and the thickness of the coating film. For comparison, the anti-algae and anti-fungal effect was measured by applying the anti-algae (mold) agent to the test piece in the same manner, in the case of adding a small amount, in the case of adding a small amount and in the case of adding a large amount. The results are shown in Table 1. The above test piece was replaced with metal siding (high gloss), a paint was applied to this surface, and weather resistance was measured in the same manner. The results are shown in Table 1.
Also described in. As an anti-algal agent, A: 2-methylthio-4-t-butylamino-6-cyclopropylamino-S-triazine, B: 2,3,5,6-tetrachloro-4- (methylsulfonyl) Pyridine, C: 2-n-
Octyl-4-isothiazolin-3-one, D: 3-
(3,4-Dichlorophenyl) -1,1-dimethylurea was used.

[0053]

[Table 1]

(Examples 8 to 12, Comparative Examples 4 to 8) The water-based algae (mold) coating composition of the present invention was used to actually spray and spray the outer wall of a building, that is, metal siding (high gloss). Was evaluated for defects. Paint sagging, defoaming,
The film-forming property and the finished appearance were observed, and the gloss at 60 ° C. after film-forming was measured. Experiments were conducted by changing the resin solid content of the algae-proofing agent, and the results are shown in Table 2. 6 when not using paint
The 0 ° C. gloss was 35. Further, for comparison, when a coating material having a low resin solid content concentration is applied to metal siding, when the concentration is increased, when the coating film thickness is reduced,
The effect was similarly measured when the thickness was increased. The algae-proofing agent was A / B = 1/1.

[0055]

[Table 2]

(Examples 13 to 17 and Comparative Examples 9 to 10) Using the water-based anti-algae (mold) coating composition of the present invention, as in Example 8, a thin coating was applied to metal siding (high gloss), and the work was carried out. The sex and finish were evaluated. As shown in Table 3, the water resistance was good and the water resistance was not abnormal. Good results were obtained when the film thickness was increased by adding a thickener, and when the amount and type of thickener were changed. In addition, as a thickener, E: sodium polyacrylate and F: methyl cellulose were used. For comparison, an experiment was conducted in the case of thickening the coating film and in the case of using a large amount of a thickener in the paint, and the workability, finish and water resistance were observed. The results are also shown in Table 3.

[0057]

[Table 3]

(Examples 18 to 21, Comparative Examples 11 to 14)
The outdoor exposed outer wall (ceramic siding of lysine pattern) where biological contamination has advanced was washed with a predetermined chemical or alcohol in advance and dried, and then the coating material of the present invention was applied. As shown in Table 4,
The detergency and the condition after one year were all good. In addition, I: sodium hypochlorite (20% aqueous solution) was used as a drug, and J: ethanol was used as an alcohol.
For comparison, if the exposed exterior wall was washed with tap water in advance and dried, and then paint was applied, or if it was not washed,
As shown in Table 4, all of them deteriorated after 1 year, and when the coating material of the present invention was not used, the state after 1 year even after washing with a chemical and spraying a diluting solution with an antialgae It was bad.

[0059]

[Table 4]

(Examples 22 to 25, Comparative Examples 15 to 16)
The coating material of the present invention is sprayed on the outer wall whose base is metal siding (high gloss), and the surface mist is wiped off with a damp cloth after leaving it for 3 minutes. Comparison was made (visual evaluation and 60 ° C. gloss). Table 5
As shown in FIG. 5, the appearance was good and the gloss at 60 ° C. was high. 60 without water-based algae coating
The ℃ gloss was 35. In the case of a coating material having a high resin solid content concentration, the gloss at 60 ° C. decreased.

[0061]

[Table 5]

(Comparative Examples 17 to 20) In the same manner as in Example 8, solvent-based paint was applied to metal siding (high gloss) coated with acrylic baking as a base, and workability was tested. The paint has a solvent odor and is finished at 60 ° C.
The gloss has deteriorated. Further, when the resin solid content concentration was increased, the film thickness was increased and the gloss was increased. In Table 6, the results of Examples 8 and 12 are also shown for reference.

[0063]

[Table 6]

Example 22 and Comparative Example 21 The coating composition of the present invention shown in Example 12 was mixed with 0.5 parts by weight of a matting agent (acrylic resin beads) based on 100 parts by weight of resin solid content. Then, when it was applied to a metal siding (high gloss) which was acrylic baked as a base, the 60 ° C. gloss was 36. On the other hand, when a paint containing 35 parts by weight of a matting agent was used, the gloss at 60 ° C. was 2, and the coating film was easily peeled off.

[0065]

By using the water-based anti-algae (mold) paint of the present invention, it is not necessary to repaint the entire surface of the building exterior member, and it can be dealt with by partial repair. Further, the anti-algae and anti-fungal effect is maintained, and not only the algae mold does not easily grow for a long time, but also the paint does not easily drip and the workability is good. It has an extremely high industrial value because it can be easily wiped off if the paint is applied to a portion that should not be applied during painting or if the paint drips.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a method of applying a building exterior member using the coating material of the present invention.

[Explanation of symbols]

1 Outer wall of building 2 windows 3 Locations of biological pollution 10 Places to apply paint 11 Paint drips 12 Paint applied to parts that do not require application 13 basics

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A01N 43/80 103 A01N 43/80 103 47/30 47/30 Z B05D 7/00 B05D 7/00 L 7 / 24 301 7/24 301C 302 302Q C09D 5/14 C09D 5/14 F term (reference) 4D075 BB24X BB65X BB79X CA45 DC02 EA06 EA60 EB12 4H011 AA02 AD01 BA01 BB09 BB10 CB09 CC2 CB09 CC2DD02 BA1 DD02 BA2 DD02 BA1 DD07 BA02 DD2 092 022 CE022 CF101 CG032 CG141 CG142 CJ031 CJ032 CK032 DB001 DG001 EA011 HA286 HA446 HA456 HA486 HA526 HA536 HA546 HA556 JA64 JB24 JB29 JB36 JC07 JC18 JC38 KA02 KA07 KA20 MA08 MA10 NA01 NA05 PB05

Claims (4)

[Claims] 1. A water-based anti-algae (mildew) paint mainly composed of a synthetic resin latex for building exterior members, which comprises 0.01 to 10 parts by weight of an algae preventative agent based on 100 parts by weight of resin solids. Alternatively, a fungicide and a thickening agent of 0 to 5 parts by weight are blended,
A water-based anti-algae (mold) paint, wherein the resin solid content concentration is adjusted to 1 to 30% by weight. 2. The water-based anti-algal paint according to claim 1, further comprising 0.1 to 30 parts by weight of a matting agent based on 100 parts by weight of the resin solid content. 3. The surface of an exterior member of a building where algae and molds propagate and biological pollution is progressing, after substantially removing the algae and molds adhering to the surface of the building exterior member, followed by washing and drying, and then the surface. A method for applying a water-based anti-algae (mold) paint, comprising applying the water-based algae-proof (mold) paint according to claim 1 or 2 thereon to form a transparent coating film. 4. When the paint is applied to a portion of the building exterior member that does not need to be applied, or when the paint drips from the applied part, the paint of that portion is wiped off promptly. The method for applying the water-based algae-proof (mold) paint according to.