JP3340937B2 - Composition for purifying coating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to compositions for cleaning coatings, and more particularly to concrete or cement based, other ceramic substrates, or iron, aluminum, stainless steel, other metal materials, or glass. It is applied to base materials such as wood, paper, etc., and dried and cured at room temperature or under low-temperature heating to provide weather resistance, nonflammability, water resistance, chemical resistance, stain resistance, heat resistance, and impact resistance. ,
Purification that has excellent hardness and is water-impermeable but air-permeable, and can provide a coating film with properties such as air purification (deodorizing), antibacterial, self-cleaning, humidity control, and heat radiation. And a composition for a functional coating.

[0002]

2. Description of the Related Art Heretofore, as a composition for a purifying coating, an inorganic type composition has hardly been found.
As the deodorizing coating composition or the antibacterial coating composition, those having deodorizing properties have been proposed. However, these compositions have problems in adhesion and hardness, are difficult to cure at room temperature, and have problems in workability due to alcoholic properties. In addition, organic deodorizing coating compositions are often found in organic ones, but their effectiveness is impaired by the covering power of the resin, and there is a problem in weather resistance.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is applied to the surface of a substrate and dried and cured at room temperature or at a low temperature to obtain a large-scale image. It has a surface area, is nonflammable, forms a high-hardness coating film with excellent weather resistance, water resistance, chemical resistance, heat resistance, stain resistance, impact resistance, corrosion resistance, and is impervious but air permeable Purifying film with good moisture control, antibacterial, antifungal, and self-cleaning properties that can remove all odor components, nitrogen oxides, sulfur oxides, exhaust gas, etc. over a long period of time It is an object of the present invention to provide a composition for a purifying coating that can be used.

[0004]

Means for Solving the Problems The present invention, (a) 3 to 15 parts by weight of amine silicate in terms of SiO _2, (b) synthetic resin 0.5-8 parts by weight, (c) silver, copper and particulate At least one selected from the group consisting of titanium oxide in the form of 0.002 to 2 parts by weight in terms of silver or copper atoms or 3 to 25 parts by weight in terms of titanium oxide; 15 to 75 parts by weight of a water-insoluble inorganic filler (hereinafter also referred to as “(d) inorganic filler”) having a particle size of 0.1 to 50 μm, and (e) water and / or a hydrophilic organic solvent 1
5 to 75 parts by weight [however, (a) + (b) + (c) +
(D) + (e) = 100 parts by weight].

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The composition for purifying coating of the present invention will be described below for each component. (A) Amine silicate The (a) amine silicate used in the present invention forms a thin film of SiO ₂ when dehydrated and dried by heating at room temperature or low temperature, and functions as a binder. When (a) an amine silicate is combined with (d) an inorganic filler, it reacts with a functional group such as a hydroxyl group on the surface of the (d) inorganic filler having a large surface area in the form of particles or fibers, and is strongly bonded. It forms a film that is nonflammable, has high weather resistance, high heat resistance, and high hardness, and is resistant to natural pollution, water, alkali, acid, and organic chemicals. (A) Specific examples of the amine silicate include quaternary ammonium silicates such as dimethyldiethanolammonium silicate, monomethyltripropanolammonium silicate, dimethylpropanolammonium silicate and monoethyltripropanolammonium, and amines such as ethanolamine on acidic silica gel. And the like are also included. Further, those in which the quaternary ammonium silicate contains a tertiary, secondary or primary amine can also be used. These (a) amine silicates can be used alone or in combination of two or more.

The proportion of the component (a) in the total of 100 parts by weight of the cleaning coating compositions (a) to (e) of the present invention is ₃ to 15 parts by weight, preferably 5 to 10 parts by weight, in terms of SiO _2. Parts by weight. If the amount of the component (a) is less than 3 parts by weight, the adhesion to the substrate and the hardness of the cured coating film are insufficient, while if it exceeds 15 parts by weight, the hardness of the coating film increases, but the cracks are increased. And the impact resistance, bending resistance, etc. are greatly reduced, which is not preferable.

(B) Synthetic Resin In the present invention, (b) a synthetic resin serves as a binder for a coating film obtained together with (a) an amine silicate, improves the impact resistance of the coating film, and has water resistance. It acts as a cushioning material to improve the properties and water permeability and to form a thick film. (B) As the synthetic resin, for example, an acrylic resin, an alkyd resin, a melamine resin, a phenol resin, an epoxy resin, a polybutadiene, a styrene-butadiene copolymer, an acryl-styrene copolymer, an acrylic-modified urethane resin and a silicone resin, Emulsion type,
Examples thereof include a water-soluble type and a hydrophilic organic solvent-soluble type, but are not limited thereto. As described above, these (b) synthetic resins are usually used in an emulsion type, a water-soluble type or a hydrophilic organic solvent-soluble type. For example, (b) the synthetic resin is mixed well with water and / or a hydrophilic organic solvent and dried to form a water-insoluble transparent or translucent film.
It is used for bonding the component (a) and the components (c) to (d).

[0008] (b) Specific examples of the emulsion type synthetic resin include vinyl acetate resin emulsion,
Examples include an acrylic resin emulsion, an acrylic-styrene copolymer emulsion, a styrene-butadiene copolymer emulsion, an acrylic-modified urethane resin emulsion, and a silicone resin emulsion. Further, specific examples of the water-soluble type include a water-soluble melamine resin, a water-soluble phenol resin, a water-soluble polybutadiene, a water-soluble acrylic resin, and the like. Further, specific examples of the hydrophilic organic solvent-soluble type include an acrylic resin, a phenol resin, an amino alkyd resin, an epoxy resin, a butyral resin, a butylated melamine resin, and the like. The above (b) synthetic resins can be used alone or in combination of two or more.

(B) The synthetic resin is contained in the composition of the present invention.
The amount is 0.5 to 8 parts by weight, preferably 0.5 to 5 parts by weight in terms of resin. When the amount is less than 0.5 part by weight, the adhesive strength is weak. (C)-
It is not preferable because the covering power is too large for the component (d), and the functions such as antibacterial property, purifying property and air permeability are impaired in addition to weather resistance, heat resistance and hardness.

Component (c) The component (c) has antibacterial properties and air purifying properties (deodorizing properties) by being supported on a hydrophilic film having a large surface area formed by (a) an amine silicate and (d) an inorganic filler. , Drying,
It functions to add a self-cleaning (lipolytic) function. Among the components (c), silver and copper are ionized by a very small amount of humidity in the atmosphere and a very small amount of water in water. The ionization amount is usually 0.002 to 0.0
It is about 2 μg / ml. Among the components (c), silver and copper include silver nitrate, silver sulfate, silver chloride, copper nitrate, copper sulfate, copper bromide, copper acetate, and other silver salts and copper salts, zeolite, silica gel, phosphoric acid Zirconyl and at least one carrier selected from the group consisting of inorganic compounds such as phosphate compounds and aluminosilicate minerals are ion-exchanged or adsorbed, or silver salts and copper salts, among which diammine silver (I ), Complex ions such as tetraammine silver (II) ion and tetraammine copper (II) ion, colloidal silver, and fine particle silver having an average particle size of 5 μm or less.

On the other hand, among the component (c), the particulate titanium oxide has a property of being photoactive when receiving ultraviolet energy. This ultraviolet energy is strongest in sunlight, followed by fluorescent light, and incandescent light is about 1% of fluorescent light.
It is slightly less than / 5. It is considered that the above photoactivity is due to oxidation and reduction reactions occurring on the surface when ultraviolet rays are absorbed by titanium oxide. The photoactivity is higher for the anatase type than for the rutile type. The average particle size of the particulate titanium oxide is
It is preferably 0.005 to 0.05 μm, more preferably 0.005 to 0.02 μm, and if it is less than 0.005 μm, it is difficult to manufacture, while if it exceeds 0.05 μm, the photoactivity effect becomes poor. .

The proportion of the component (c) in the composition of the present invention is, in the case of silver and / or copper, 0.002 to 2 parts by weight, preferably 0.005 to 1 part by weight, in terms of silver or copper atoms.
In the case of fine particles of titanium oxide, the amount is 3 to 25 parts by weight, preferably 10 to 25 parts by weight in terms of titanium oxide.
If the amount is too small, the ionization amount is small, and the total photoactivity is insufficient, and the purifying property is not expressed.On the other hand, if the amount is too large, discoloration or elution occurs, or the viscosity becomes too high, which is preferable. Absent.

(D) Inorganic filler (d) The inorganic filler is required for (a) promoting the curing reaction of the amine silicate and for forming a thick film, and further forming a large surface area. Coloring, imparting various functionalities to the coating film, for example, imparting heat insulation, conductivity, heat radiation, abrasion resistance, air permeability, etc. to the coating film. (D) As the inorganic filler, one having an average particle diameter or an average length of preferably 0.01 to 50 μm, preferably 0.2 to 20 μm is used. The average particle size is
If the thickness is less than 0.01 μm, a required film thickness cannot be obtained,
The functionality of the inorganic filler cannot be exhibited or the production cost becomes too high. On the other hand, if it exceeds 50 μm, the coating film becomes rough or the adhesion decreases. The inorganic filler (d) is preferably a water-insoluble, particulate or fibrous material, and includes at least one selected from the group consisting of inorganic extender, functional pigment, inorganic pigment and metal powder. be able to.

(D) Specific examples of the inorganic filler include commercially available silica, alumina, kaolin, calcium carbonate, zircon,
Tin oxide, mullite, zeolite, talc, pearlite, carbon, potassium titanate whiskers, silicon carbide, silicon nitride, or oxides such as titanium, iron, manganese, cobalt, chromium, nickel, or carbon or cobalt and aluminum, iron and manganese And inorganic powders such as three kinds of synthetic oxides such as iron, copper and chromium, and metal powders such as zinc, nickel, stainless steel, aluminum and tin. It is not limited.

(D) The mixing ratio of the inorganic filler is 15 to 75 parts by weight, preferably 30 to 60 parts by weight in the composition of the present invention.
When the amount is less than 15 parts by weight, a thick film cannot be formed, the coloring power becomes insufficient, and the function cannot be further exhibited. And the bonding strength, hardness, flexibility and the like are undesirably reduced.

(E) Water and / or hydrophilic organic solvent The component (e) used in the present invention is used as an agent for adjusting the solid concentration and viscosity of the composition of the present invention, as a drying speed adjusting agent, and as an antifreezing agent. I do. Of the component (e), tap water, distilled water, and ion-exchanged water can be used as water.
In the case where water is present in the components (b) to (d), the water includes the water.

On the other hand, among the component (e) used in the present invention, the hydrophilic organic solvent is an organic solvent which is used as a drying speed regulator, an antifreeze solution and the like and is compatible with water. When a hydrophilic organic solvent is present in the components (a) to (d), the hydrophilic organic solvent also includes the hydrophilic organic solvent. The hydrophilic organic solvent used in the present invention includes alcohols, glycols, esters, ethers and the like. Examples of the alcohols include aliphatic alcohols having 1 to 8 carbon atoms, such as methanol, ethanol, n-propanol, i-propanol, n-butanol and sec.
-Butanol, t-butanol, n-pentanol, n
-Hexanol, 4-methyl-2-pentanol, 4-
Methyl-n-pentanol, methyl carbitol and the like can be mentioned. Examples of the glycols include ethylene glycol and propylene glycol. Examples of the esters include esters of the above alcohols and glycols such as formic acid, acetic acid, and propionic acid, specifically, methyl formate, ethyl formate, butyl formate, methyl acetate, ethyl acetate, butyl acetate, and ethyl propionate. it can.

Examples of the ethers include alkyl ethers of the above alcohols and glycols, such as dimethyl ether, diethyl ether, dibutyl ether, methyl ethyl ether, ethyl butyl ether, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate and propylene. Glycol monoethyl ether and the like. This hydrophilic organic solvent can be used alone or as a mixed solvent of two or more. In the present invention, n-butanol, ethylene glycol, butyl cellosolve alone or a mixed solvent of two or more thereof is preferably used. You.

The compounding ratio of the component (e) in the composition of the present invention is 15 to 75 parts by weight, preferably 30 to 60 parts by weight. If the compounding ratio of the component (e) is less than 15 parts by weight, the viscosity of the composition will increase too much, and the storage stability will decrease,
On the other hand, when the amount exceeds 75 parts by weight, the storage stability is improved, but the solid content concentration in the composition is decreased, which is not preferable.

The composition for purifying coating of the present invention may contain a curing catalyst. The curing catalyst functions to react with the component (a) in the composition of the present invention to promote curing and improve water resistance. As curing catalysts, basic substances, mineral acids,
Phosphates, silicofluorides and the like, specifically, zinc, magnesium, oxides such as calcium, hydroxide, carbonate, or boric acid, phosphoric acid, magnesium phosphate, aluminum phosphate, zinc powder, Tin powder and the like. These curing catalysts can be used alone or in combination of two or more.

The compounding ratio of the curing catalyst is determined according to the composition 1 of the present invention.
The amount is usually 0.05 to 5 parts by weight, preferably 0.1 to 2 parts by weight based on 00 parts by weight. If the amount is less than 0.05 part by weight, the curing reaction may not be easily promoted at room temperature, while
If the amount exceeds 5 parts by weight, the composition gels, which is not preferable.

The cleaning coating composition of the present invention may further contain various surfactants, dyes, etc., in addition to the above components (a) to (e) and, if necessary, a curing catalyst. it can.

The composition for purifying coating of the present invention comprises:
It contains the above components (a) to (e) and, if necessary, additives, and the pH is usually 10 to 12. Further, the solid content concentration of the composition for purifying coating of the present invention is 20%.
-85% by weight, preferably 30-75% by weight. 2
If the amount is less than 0% by weight, a coating film having a sufficient thickness cannot be obtained by one application, while if it exceeds 85% by weight, the composition gels or the coating film is cracked. Absent.

To prepare the composition for cleaning coating of the present invention, for example, the following methods may be mentioned, but the present invention is not limited thereto. After mixing and stirring the components (a) to (b) and (e), the components (c) to (d) are added, and the mixture is dispersed and blended with a high-speed stirrer for 20 minutes or more. An appropriate amount of the component (a) is added to the component (e), and the component (d) is mixed with the component (a) to form a high-concentration dispersion by a roll mill. Add the components (c) and disperse / mix with a medium speed stirrer for 15 minutes or more.

Substrates to be coated with the composition for cleaning coating of the present invention include metals such as iron, stainless steel and aluminum; inorganic substrates such as cement, concrete, glass and ceramics; plastics;
This is the surface of organic and inorganic coatings, in addition to organic substrates such as paper and wood. In particular, as a specific example of the base material, the exterior of a building such as a building, a factory, a house, a ceiling or an inner wall, a kitchen,
Interiors such as toilets and other building materials, all outdoor structures and roads, ports, railways, power facilities, agriculture,
Examples include food-related facilities, automobiles, ships, OA / home electric appliances, communication devices, and other industrial-related equipment.

The coating of the composition for cleaning coating on a substrate may be performed by brushing, spraying, dipping,
Coating means such as a roll coat and a flow coat can be used. It is possible to form a coating film having a dry film thickness of 5 to 300 μm by one application, and it is also possible to apply two or three more applications. In the case of recoating, a curing treatment may be performed once.

The composition for purifying coating of the present invention comprises:
When coated on a substrate, a coating film is formed in a short time at a temperature of from room temperature to 200 ° C., and with evaporation of water or a solvent, SiO ₂ and (b) synthetic resin, and further (c) to (d)
A complex cured coating of the components is formed.

The cured coating film formed by the composition for cleaning coating of the present invention has extremely excellent adhesion to most substrates due to the synergistic effect of SiO ₂ and the synthetic resin. The surface hardness of the cured coating film is SiO ₂
With the component (d), a high hardness close to that of an inorganic material can be obtained, and the decrease in impact and flexibility due to the high hardness complements the synthetic resin as a cushioning material. The properties are also very good. Furthermore, the component (c)
By exerting the functionality by the component (d), a cured coating film having stronger antibacterial properties, deodorant properties, self-cleaning properties due to lipolytic properties, and the like can be obtained. In addition to the above, SiO
₂ and the synthetic resin complement each other, and a cured coating film having excellent weather resistance, water resistance, heat resistance, organic / inorganic chemical resistance, corrosion resistance, and stain resistance can be obtained. The purifying coating composition of the present invention is extremely excellent in workability because various coating means can be adopted, and also excellent in repairability because it can be repeatedly applied. Furthermore, when the composition for purifying coating of the present invention is applied to concrete or other cement base material, the coating film does not permeate, but has good air permeability and drying properties, so that dew condensation cannot occur inside, and high In addition to showing protection, it also shows strong resistance to freezing damage.

[0029]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples. In the examples, “parts” and “%” are based on weight unless otherwise specified.

Examples 1 to 6 and Comparative Examples 1 to 3 Preparation of coating compositions: The following components were stirred for 60 minutes using a stirrer, and then mixed with an ultra-high-speed stirrer.
The mixture was dispersed and mixed for 5 minutes to prepare coating compositions A to F (Examples 1 to 6) and coating compositions G to I (Comparative Examples 1 to 3) having the mixing ratios shown in Table 1.

(A) Amine silicate (a) -1; Cas 25 [Nissan Chemical Industries, Ltd., Si
O ₂ concentration = about 25%] (a) -2; NS 25 [Corporation Nichiita Laboratory Ltd., SiO
₍₂ concentration = about 25%) (b) Synthetic resin (b) -1; acrylic resin emulsion (solid content = about 5%)
(B) -2; water-soluble melamine resin (solid content = about 60%) (b) -3; silicone resin emulsion (solid content = about 40%)

(C) Component (c) -1; synthetic zeolite carrying silver (average particle size = about 1.
5 μm, silver content = about 4%) (c) -2; silica gel supported on copper (average particle size = about 4 μm,
(C) -3; diammine silver (I) ion (5% silver aqueous solution) (c) -4; fine titanium oxide (average particle size = 0.02)
μm)

(D) Component (d) -1; silicon dioxide (average particle size = 3 μm) (d) -2; kaolin (average particle size = 5 μm) (d) -3; silicon dioxide (average particle size = 15 μm) (D) -4; potassium titanate whisker (average length =
(D) -5; titanium oxide white (average particle size = 0.5 μm) (d) -6; iron oxide yellow (average particle size = 0.5 μm) (d) -7; iron / manganese synthesis Oxide black (average particle size =
0.4 μm) (d) -8; finely divided aluminum oxide (average particle size =
0.02 μm)

(E) Component (e) -1; ion-exchanged water (e) -2; ethylene glycol (f) and other additives (f) -1; dispersant (nonionic surfactant) (f)- 2: Silicone leveling agent (f) -3: 15% aqueous magnesium carbonate dispersion

[0035]

[Table 1]

Test Examples (1) Preparation of Test Pieces for Evaluation Test The coating compositions shown in Table 1 prepared in the above Examples and Comparative Examples were applied to various substrates shown in Tables 2 and 3 and cured. Test piece (TP) number 1 for evaluation test
21 was produced. Each coated test piece was dried and cured, and then left in a room for 7 days to be subjected to various tests.

[0037]

[Table 2]

[0038]

[Table 3]

(2) Evaluation Test (Evaluation Test of Physical Properties) In order to examine the physical properties of the coating film of the composition of the present invention, tests were carried out using various test pieces prepared in Tables 2 and 3. Adhesion JIS K5400.8.5.2 Based on cross cut tape test. Hardness Based on JIS K5400.8.4.2 brush writing test. Impact resistance Based on JIS K5400.8.3.2 Impact resistance Dupont test (1/2 inch, 500 g × 30 cm)

[0040] conforming to the washing resistance JIS K5400.8.11 wash resistance test. Water resistance Based on JIS K5400.8.19 water resistance test (immersed in deionized water for 30 days). After keeping the test piece in warm water of 60 ° C. for 14 days, the appearance of the coating film was observed. Moisture resistance ( JIS K5400.9.2) (5)
0 ° C, 95%, 30 days).

A 2% caustic soda solution was dropped on an alkali-resistant test piece, which was maintained for 6 hours. Then, the appearance of the coating film was observed. A 5% aqueous sulfuric acid solution was added dropwise to the acid-resistant test piece, and after maintaining for 6 hours, the appearance of the coating film was observed. Accelerated weather resistance The test piece was exposed for 4,000 hours using a sunshine carbon arc lamp weather tester based on JIS K5400.9.8.1, and then the appearance of the coating film was observed. Permeability JIS A6909.6.12 Permeability test A method was followed.

The evaluation of the results of the observation of the appearance of the coating film is as follows.
Based on: ；: No peeling or cracking of the coating film was observed,
There is no change in appearance such as discoloration. Δ: No peeling or cracking of the coating film was observed, and erosion, dirt, discoloration, etc. were observed in part. X: Peeling and cracking of the coating film are observed. Further, erosion, dirt, and discoloration are recognized by 1/4 or more. -; Not evaluated

[0043]

[Table 4]

[0044]

[Table 5]

(3) Evaluation test (Evaluation test for antibacterial activity) In order to examine the antibacterial activity, test pieces shown in Tables 2 and 3 were used.
An antibacterial activity test was performed according to the following. That is, a test piece is used as a sample, and bacterial solutions of Escherichia coli, MRSA, and Aspergillus niger are dropped, respectively, and then a polyethylene film is adhered to the sample and stored at 35 ° C., and the viable cell count of the sample after storage for 6 hours and 24 hours Was measured. The control was a plastic petri dish.

[0046]

[Table 6]

(4) Evaluation test [Air purification (deodorization)
Evaluation Test] In order to examine the effect of removing odorous gas, a measurement test was performed using the test pieces prepared in Tables 2 and 3. That is, in the test, a test piece was placed in a column, and a dynamic test method in which a certain concentration of odor gas was passed through a pump was used to measure the adsorption removal effect on the odor gas. In addition,
A certain amount of offensive odor gas was passed, and the concentration was measured at the entrance and exit of the column using a gas detector tube. As the odor gas, four kinds of ammonia, hydrogen sulfide, trimethylamine and sulfur dioxide were used.

[0048]

[Table 7]

[0049]

[Table 8]

[0050]

[Table 9]

[0051]

[Table 10]

(5) Evaluation test [Self-cleaning property (contamination resistance)] Evaluation test In order to examine the self-cleaning property, test liquids were applied to test pieces Nos. 1, 4, 11, and 21, respectively.
After being left in the room for days, water was sprayed on each of the inclined test pieces, and the state of traces of the test liquid was observed. The test liquid was prepared by mixing and dispersing 0.2% of particulate carbon in soybean oil or lubricating oil for automobiles and stirring the dispersion.
A test solution and a test solution were used. In addition, those with no trace were evaluated as ○, those with traces in some or places were evaluated as Δ, and those with half or more were evaluated as x. In addition, as a control,
Aluminum plate coated with urethane resin (150 × 75 × 1m
m) was used.

[0053]

[Table 11]

Next, the compositions A, C, F, and G shown in Table 1 were applied to the concrete fences along the national highway so that the compositions A, C, F, and G were each 2 m wide and 1 m wide, and the stain state of the coating film was observed for one year. did. In addition, 2 m in height and 1 m in width were similarly applied with an acrylic silicone-based paint as a control. The thickness of all the coating films was about 70 μm.

[0055]

[Table 12]

(5) Evaluation Test (Humidity Control Evaluation Test) Test pieces Nos. 1, 5, 10,
Using No. 18, a test of moisture absorption / exhaustability was performed. The test method is
The test piece and the control were placed in the environmental test room, and the moisture absorption condition; 25 ° C., 90%, and the moisture release condition; 25 ° C., 50%, and the moisture absorption / desorption amount (%) after 6, 12, and 24 hours. It was measured. As a control, a raw cement molded plate (150 × 7
5 × 12 mm) and plywood (150 × 75 × 10 mm) were prepared and designated as test piece numbers 22 and 23.

[0057]

[Table 13]

(6) Evaluation test (Non-flammability and fire resistance evaluation test) Using test pieces Nos. 2, 7, 14, and 19, the painted surface was exposed to a city gas flame for 20 minutes, and then the adhesion of the coating film was measured. (Based on JIS K5400.8.5.2, cross cut tape test), hardness (based on JIS K5400.8.4.2 pencil scratch test), and appearance.

[0059]

[0060]

According to the composition for purifying coating of the present invention, it is applied to the surface of a substrate and dried and cured at room temperature or under low temperature heating to have a large surface area, non-flammability and weather resistance. Excellent in water resistance, water resistance, chemical resistance, heat resistance, stain resistance, impact resistance, corrosion resistance, hardness, etc., and is water-impermeable but air-permeable, has good humidity control, antibacterial properties, anti-mildew properties A self-cleaning, purifying coating film capable of removing all odor components, nitrogen oxides, sulfur oxides, exhaust gas and the like over a long period of time is obtained.

Claims (4)

(57) [Claims] (1) 3 to 15 parts by weight of an amine silicate in terms of SiO ₂ , (b) 0.5 to 8 parts by weight of a synthetic resin,
(C) at least one selected from the group consisting of silver, copper and fine-grained titanium oxide is 0.000 in terms of silver or copper atoms;
2 to 2 parts by weight or 3 to 25 parts by weight in terms of titanium oxide,
(D) 15 to 75 parts by weight of a water-insoluble inorganic filler having an average particle diameter or an average length of 0.01 to 50 μm, and (e) 15 to 75 parts by weight of water and / or a hydrophilic organic solvent [ , (A) + (b) + (c) + (d) + (e)
= 100 parts by weight]. 2. The synthetic resin (b) is an acrylic resin, an alkyd resin, a melamine resin, a phenol resin, an epoxy resin, a polybutadiene, a styrene-butadiene copolymer,
At least one selected from the group consisting of an acrylic-styrene copolymer, an acrylic-modified urethane resin and a silicone resin
2. The composition for cleaning coating according to claim 1, wherein the composition is an emulsion type, a water-soluble type or a hydrophilic organic solvent-soluble type. 3. The method according to claim 1, wherein the silver and / or copper in the component (c) is
Zeolite, aluminosilicate minerals, zirconyl phosphate, silica gel, other inorganic compounds with silver and / or copper salts ion-exchanged or adsorbed / fixed,
The cleaning composition according to claim 1, which is a complex ion comprising diammine silver (I) ion and / or tetraammine silver (II) ion, or colloidal silver or silver powder. 4. The fine particle titanium oxide in the component (c),
The composition for purifying coating according to claim 1, wherein the composition has an average particle size of 0.005 to 0.05 µm.