JPH11172157A - Antifungal and antimicrobial coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject coating material capable of retaining antifungal and antimicrobial effects, namely antifungal, antimicrobial and algicidal effects for a long period of time, by compounding a specific inorganic aeration type water-repellent coating material with a fungicide. SOLUTION: This coating material is obtained by compounding 100 pts.wt. of an inorganic aeration type water-repellent coating material composed of colloidal silica, a silane-based water-repellent material (e.g. sodium trimethylsilyl sulfonate), an aqueous resin emulsion (e.g. acrylic aqueous emulsion or the like), an inorganic substance (e.g. amorphous silica or the like) or the like with 0.05-10 pts.wt. of a fungicide (benzimidazolylcarbamic acid ethyl ester or the like).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fungicide-resistant coating material, more particularly, to an inorganic air-permeable water-repellent coating material containing colloidal silica as a binder and having excellent air permeability and water repellency, and a fungicide. The present invention relates to a coating material which can exhibit a long-term antifungal effect, that is, a fungicidal, antibacterial and antialgal effect.

[0002]

2. Description of the Related Art In general houses and other architectural structures, molds, bacteria and bacteria caused by various fungi are present on concrete structures and wall materials thereof, especially in wetlands and marine areas. In this case, moss is generated, and measures to prevent such moss are desired. Therefore, for the purpose of such fungicides, for example, antibacterial and algal coatings in which an organic resin binder is blended with an organic antibacterial agent, an antibacterial metal salt or zeolite ion-exchanged with an antibacterial metal have been proposed. However, there was a problem in the persistence of the effect due to elution of the antibacterial substance.

[0003]

Means for Solving the Problems The present inventors have made various studies in order to solve the above-mentioned problems. As a result, the present inventors have found that inorganic air-permeable repellents containing colloidal silica as a binder and having excellent air permeability and water repellency are provided. If a mildewproofing agent is added to the water-coated material, the microporous coating made of colloidal silica, etc., absorbs and holds the mildewproofing agent, and the coating film formed after application exerts a sustained release effect due to the air permeability. In addition, by imparting water repellency, not only the durability including water resistance and weather resistance can be enhanced, but also the dissolution of the fungicide can be effectively prevented, so that the antifungal effect for a long time, that is, fungicide, fungicide and algae prevention The inventors have found that the effects can be maintained, and have completed the present invention.

That is, the present invention relates to a colloidal silica,
An object of the present invention is to provide a fungicidal fungicidal coating material characterized in that a fungicide is added to an inorganic air-permeable water-repellent paint composed of a silane-based water-repellent, an aqueous resin emulsion, and other inorganic substances.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The above-mentioned inorganic air-permeable water-repellent paint used in the present invention is prepared by adding a silane-based water-repellent to an aqueous resin emulsion containing colloidal silica (an aqueous dispersion of silica having a particle diameter of about 1 to 100 nm). And other inorganic substances, and, if necessary, an appropriate amount of an organic substance (methyl ethyl cellulose, polyvinyl acetate emulsion, polystyrene-butadiene emulsion, polyamide emulsion, etc.), colored pigment, extender pigment, rust preventive pigment, It is composed of a system containing a thickener, a filler, a dispersant, a viscosity modifier, and an antifoaming agent, and has excellent durability, adhesiveness, water vapor permeability (moisture permeability),
Provides water repellency and stain resistance. The content of the colloidal silica is usually 1 to 20% (% by weight,
The same applies hereafter).

[0006] The aqueous resin emulsion may be any aqueous dispersion containing various resins, as long as it can form a continuous film by removing (drying) water. Emulsions are preferred.
Such an acrylic aqueous emulsion refers to at least one of (meth) acrylates (eg, ethyl acrylate, ethyl methacrylate, 2-ethylhexyl acrylate, hydroxypropyl methacrylate, etc.) alone, or about 10 mol% or less of styrene, ethylene, This is an aqueous emulsion obtained by emulsion-polymerizing a mixture of vinyl acetate, acrylonitrile, butadiene and other monomers with water.

Examples of the silane-based water repellent include sodium trimethylsilylsulfonate, sodium triethylsilylsulfonate, trimethylsilylamine, trimethylsilylacetamide, sodium trimethylsilylcarboxylate, and the like. The amount of addition is usually 100% of the total solid content of the colloidal silica and the aqueous resin emulsion.
Parts (parts by weight, hereinafter the same) may be set to 10 to 30 parts. Examples of the other inorganic substance include amorphous silica, quartz, cristobalite, fused silica, bentonite, alumina powder, fused alumina, sillimanite, mullite, zirconia, titanium, magnesia, and the like. Usually, the addition amount may be set to 100 to 1000 parts with respect to 100 parts of the total amount of both the solid content of the colloidal silica and the aqueous resin emulsion and the silane-based water repellent.

The fungicides used in the present invention include tetrachloro-isophthalonitrile, 2- (4-thiazolyl) benzimidazole, 10,10'-oxybisphenoxyarsine, hexahydro-1,3,5-triethyl- S-
Triazine, 2-bromo-2-nitro-1,3-propanediol, 3-iodopropargylbutylcarbamate, methyl benzimidazolylcarbamate, ethyl ester, hexahydro-1,3,5-tris (2-hydroxyethyl) -S -Triazine, 2- (hydroxymethylamino) ethanol, 2,2-dibromo-1,2-dibromo-2,4-dicyanobutane, 3-iodopropargylbutyl carbamate, methylenebis-thiocyanate,
5-chloro-2-methyl-4-isothiazolin-3-one, 1,2-benzisothiazolin-3-one, benzalkonium chloride, paraben, methyl-2-benzimidazolylcarbamate, sodium pridyl-N-oxide-2- Silver antibacterial fungicides such as thiolate, dehydroacetic acid, sorbic acid, AgZn-zeolite, silver-containing zeolite, silver-containing zirconium phosphate-based ceramics, silver-containing titania, and silver-containing ceramics. Use the above mixture. The amount used is usually 0.1 part with respect to 100 parts of the inorganic ventilation type water-repellent paint.
What is necessary is just to select in the range of 05-10 parts. If the amount is less than 0.05 part, the antifungal effect is insufficient, and if it exceeds 10 parts, the performance of the paint may be deteriorated, the stability may be deteriorated, and it tends to be economically disadvantageous. is there.

The antifungal coating material according to the present invention comprises:
It is composed of a system in which an antifungal agent is added to the above-mentioned predetermined percentage of the inorganic air-permeable water-repellent paint, and when applied, it is generally applied to an appropriate substrate in an amount of 100 to 500 g / m ² (spray, (By brush coating, roller coating, etc.), and then curing and drying under natural conditions, to form a coating film having desired durability and antifungal properties.

[0010]

Next, the present invention will be described more specifically with reference to examples and comparative examples. Example 1 (1) Inorganic air-permeable water-repellent paint The composition of the paint is as follows. The composition of the acrylic water-based emulsion 30 colloidal silica 10 thickening aqueous 10 quartz powder 100 clay 200 micronized white marble 50 titanium oxide 50 Water 50 Total 500 (2) inorganic vented anti germs coating material (1) 100 parts of water repellent paint, fungicide
(Benzimidazolyl carbamic acid ethyl ester) (1 part) is added, and the mixture is stirred uniformly.

(3) Performance test The coating material of the above (2) is brush-coated on the slate at a coating amount of 400 g / m ² and cured for 14 days in an atmosphere of 20 ° C./60% RH. Evaluate water repellency and mold resistance. Also, sunshine weather meter
After exposing for 1000 hours with Suga Test Machine Co., Ltd., the same test is performed to evaluate the durability performance. The results are shown in Table 1 below.
Shown in Tap water is dripped into the water- repellent painted slate test specimen with a dropper,
The repelling condition is visually determined. :: With repelling, ×: Without repelling Mold resistance Performed according to the mold resistance test method of JIS-Z-2911. ○: No growth of mold fungus was observed ×: Growth of mold fungus was observed

Comparative Examples 1 to 3 When the antifungal agent was omitted from the fungicidal fungicidal coating material of Example 1 (Comparative Example 1); Instead of the inorganic air-permeable water-repellent paint, a general acrylic emulsion paint for construction was used. The same performance test as in Example 1 was performed for each of the cases using (Comparative Example 2) and the lysine-based paint (Comparative Example 3), and the results are shown in Table 1.

[Table 1]

Claims (2)

[Claims] 1. An antifungal coating material comprising an inorganic air-permeable water-repellent paint comprising colloidal silica, a silane-based water-repellent, an aqueous resin emulsion and other inorganic substances, and a fungicide. . 2. The antifungal coating material according to claim 1, wherein the amount of the fungicide is 0.05 to 10 parts by weight based on 100 parts by weight of the inorganic air-permeable water-repellent paint.