JP6798785B2 - Polymer cement paint and anti-termite method - Google Patents

Description

The present invention relates to polymer cement coatings and anti-termite methods.

Conventionally, as a building, a wooden building having a concrete foundation and a wooden frame provided on the foundation is known. Further, a polymer cement paint used for protecting a concrete foundation of a building is known (see Patent Document 1).

In general, wooden buildings use anti-termite agents to prevent damage caused by termites. Patent Documents 2 and 3 disclose microcapsules containing an anti-termite agent.

Japanese Unexamined Patent Publication No. 2012-062213 International Publication No. 2009/057783 Japanese Unexamined Patent Publication No. 2008-184391

When a through hole that penetrates the concrete foundation is formed due to a crack generated in the concrete foundation or rust of the reinforcing bar buried in the concrete foundation, the through hole can be an invasion route for termites.

The present invention has been made in view of these circumstances, and an object of the present invention is to provide a polymer cement coating material and an anti-termite method capable of preventing the invasion of termites in a concrete foundation.

A polymer cement paint that solves the above problems includes a plurality of agents including the first agent and the second agent, prepares a mixture of the plurality of agents at the time of use, and applies the mixture to the concrete foundation of a building. The first agent is a powder composition containing cement, and the second agent is a liquid containing a polymer and an aqueous dispersion medium for dispersing the polymer. It is a composition and has a structure in which an anti-termite agent is contained in the mixture.

The polymer cement coating material preferably has a structure in which the mixture contains porous inorganic particles.
The anti-termite method for solving the above-mentioned problems is an anti-termite method for preventing a building having a concrete foundation by using the above-mentioned polymer cement paint, and is a mixing step of mixing the plurality of agents to prepare a mixture. A protective coating layer forming step of forming a protective coating layer containing the anti-termite agent on the concrete foundation using the mixture is provided.

According to the present invention, it is possible to prevent the invasion of termites in a concrete foundation.

Hereinafter, embodiments of the polymer cement coating material and the anti-termite method will be described.
The polymer cement coating material of the present embodiment is composed of a first agent and a second agent. The polymer cement paint is used for preparing a mixture of a first agent and a second agent at the time of use and applying the mixture to a concrete foundation of a building. The first agent of the polymer cement coating material is a powder composition containing cement. The second agent of the polymer cement coating material is a liquid composition containing a polymer, an aqueous dispersion medium for dispersing the polymer, and an anti-termite agent. That is, the polymer cement paint has a structure in which an anti-termite agent is contained in a mixture of the first agent and the second agent. A protective coating layer containing an anti-termite agent is formed on the concrete foundation to which the polymer cement paint is applied.

Examples of the cement contained in the first agent include Portland cement, alumina cement, and blast furnace cement. White cement can also be used as the cement contained in the first agent. White cement is a cement in which the content of components such as chromium, manganese, and iron, which are colored black in general cement, is reduced. Examples of white cement include white Portland cement and white alumina cement.

One type of cement may be used, or two or more types may be used in combination.
The first agent may contain components other than cement. The first agent preferably contains porous inorganic particles from the viewpoint of facilitating the diffusion of the anti-termite agent in the protective coating layer formed from the polymer cement paint. Examples of the porous inorganic particles include alumina balloons, glass microballoons, silas balloons, fly ash balloons, mullite balloons, perlite, vermiculite, and diatomaceous earth. One type of the porous inorganic particles may be used, or two or more types may be used in combination.

The particle size of the porous inorganic particles is preferably, for example, 5 to 500 μm. The bulk specific gravity of the porous inorganic particles is preferably, for example, 0.05 to 1.5 g / cm ³ . The content of the porous inorganic particles is preferably 1 to 20 parts by mass with respect to 100 parts by mass of the cement content.

The first agent may contain at least one selected from, for example, a white pigment, a curing accelerator, a filler, an additive, and a coloring pigment as a component other than cement.
Examples of the white pigment include titanium oxide, white lead, zinc oxide, and zinc sulfide. The content of the white pigment is preferably 5 to 30 parts by mass, and more preferably 7 to 15 parts by mass with respect to 100 parts by mass of the cement content.

Examples of the curing accelerator include formates, acetates, hydrochlorides, sulfates, nitrates, nitrites, aluminates, and silicates. Specific examples thereof include calcium formate, calcium acetate, magnesium chloride, magnesium sulfate, calcium chloride, calcium sulfate, sodium aluminate, potassium aluminate, aluminum sulfate, and sodium silicate. The content of the curing accelerator is preferably 0.5 to 5 parts by mass, and more preferably 1 to 3 parts by mass with respect to 100 parts by mass of the cement content.

Examples of the filler include non-porous inorganic particles, an organic filler, an inorganic fiber, and an organic fiber. Examples of the non-porous inorganic particles include river sand, silica sand, cold water sand, crushed ceramics, crushed glass, and calcium carbonate. Examples of the organic filler include solid resin particles, porous resin particles, and hollow resin particles. Examples of the inorganic fiber include rock wool, slag wool, and glass fiber. Examples of the organic fiber include acrylic fiber, vinylon fiber, polyamide fiber, aromatic polyamide fiber, polyester fiber, and cellulose-based fiber.

Examples of the additive include a film-forming auxiliary, a viscosity modifier, a water absorption inhibitor, a water repellent, a water reducing agent, a fluidizing agent, and a water retaining agent.
Color pigments include, for example, cadnium red, bengara, toluidine red, chrome yellow, iron yellow, titanium yellow, fast yellow, anthraquinone yellow, benzidine yellow, chromium oxide, phthalocyanine green, navy blue, ultramarine blue, phthalocyanine blue, and carbon black. , Inorganic and organic pigments such as iron ink and graphite.

The second agent of the present embodiment is a liquid composition containing a polymer, an aqueous dispersion medium for dispersing the polymer, and an anti-termite agent.
Examples of the polymer contained in the second agent include vinyl acetate resin, ethylene vinyl acetate resin, vinyl propionate resin, vinyl carboxylate resin such as vinyl versatic acid, methyl (meth) acrylate resin, and (meth). Acrylic resins such as ethyl acrylate resin, methyl acrylate resin, (meth) ethyl acrylate resin, (meth) butyl acrylate resin, (meth) 2-ethylhexyl acrylate resin, acrylonitrile resin, and methacrylonitrile resin. , Urethane resin, epoxy resin, alkyd resin, phenol resin, vinyl chloride resin, polypropylene resin, polyethylene resin, polystyrene resin, modified resin modified from these resins, and two or more kinds of monomers constituting these resins. Examples thereof include copolymers that have been copolymerized. The (meth) acrylic acid indicates methacrylic acid or acrylic acid.

One type of polymer may be used, or two or more types may be used in combination.
The glass transition temperature Tg of the polymer is −35 to 10 ° C. from the viewpoint of increasing the flexibility of the protective coating layer formed from the polymer cement paint and improving the followability when a crack occurs in the concrete foundation. Is preferable, and more preferably −5 ° C. or lower. The glass transition temperature Tg of the polymer is preferably −20 ° C. or higher from the viewpoint of suppressing the adhesion of dirt such as dust to the protective coating layer.

The content of the polymer is preferably 15 to 100 parts by mass, more preferably 35 to 70 parts by mass, and further preferably 40 to 70 parts by mass with respect to 100 parts by mass of the cement content. By increasing the content of the polymer, the flexibility of the protective coating layer can be increased. By lowering the content of the polymer, it becomes possible to facilitate the diffusion of the anti-termite agent in the protective coating layer.

The polymer in the second agent is dispersed in an aqueous dispersion medium. That is, the second agent contains a synthetic resin emulsion in which the polymer is dispersed in an aqueous dispersion medium. The aqueous dispersion medium is not limited to water, and may be a mixed dispersion medium of water and a water-soluble organic solvent. Examples of the water-soluble organic solvent include lower alcohols having 1 to 4 carbon atoms and glycols having 2 to 6 carbon atoms.

Examples of the anti-termite compound contained in the second agent include neonicotinoid compounds, pyrethroid compounds, organic chlorine compounds, organic phosphorus compounds, carbamate compounds, pyrrol compounds, phenylpyrazole compounds, and oxadiazine compounds. Examples thereof include compounds and semicarbazone compounds.

Examples of neonicotinoid compounds include (E) -1- (2-chlorothiazole-5-ylmethyl) -3-methyl-2-nitroguanidine (crotianidine) and N-acetyl-N- (2-chlorothiazole). -5-Il) Methyl-N'-Methyl-N "-Nitroguanidine, N- (2-Chlorothiazole-5-Il) Methyl-N-Methylcarbonyl-N'-Methyl-N" -Nitroguanidine, 1- (6-Chloro-3-pyridylmethyl) -N-nitroimidazolin-2-iridenamine (imidacloprid), 3- (2-chloro-thiazole-5-ylmethyl) -5- [1,3,5] oxadiadinane-4- Ilindene-N-nitroamine (thiametoxam) and (E) -N'-[(6-chloro-3-pyridinyl) methyl] -N "-cyano-N'-methylacetamidine (acetamipride) can be mentioned.

Examples of pyrethroid compounds include allethrin, permethrin, tralomethrin, bifentrin, acrinathrin, alphacypermethrin, cypermethrin, cypermethrin, prarethrin, etofenprox, silafluofen, and fenvalerate.

Examples of the organochlorine compound include Kelsen. Examples of the organophosphorus compound include phoxim, pyridafenthion, fenitrothion, tetrachlorobinphos, diclofenthion, and propetanphos. Examples of carbamate compounds include carbaryl, phenocarb, and propoxul. Examples of pyrrole compounds include chlorfenapyr. Examples of the phenylpyrazole-based compound include fipronil. Examples of the oxadiadin-based compound include indoxacarb. Examples of the semicarbazone-based compound include α- (α, α, α-trifluoro-m-toluoil) -p-trinitrile-4- (p-trifluoromethoxyphenyl) semicarbazone.

One type of anti-termite agent may be used, or two or more types may be used in combination.
The dosage form of the anti-termite agent is not particularly limited, and examples thereof include powders, liquids, and microcapsules. The form of the anti-termite is a microcapsule encapsulated in microcapsules from the viewpoint of suppressing the decomposition of the anti-termite due to the alkaline component in cement and the alkaline component contained in the concrete foundation. Is preferable. The wall material for forming the microcapsules is not particularly limited as long as it has alkali resistance, and examples thereof include synthetic resins, polyureas, and gelatins. The particle size of the microcapsules is, for example, 10 to 30 μm, and the wall thickness of the microcapsules is, for example, 1.8 to 4 μm.

Examples of the method of encapsulating the anti-termite agent in the microcapsules include an interfacial polymerization method, an insolubilization reaction method, and a spray-drying method. Specifically, for example, it can be obtained by the method disclosed in International Publication No. 2009/057883 and JP-A-2008-184391.

The content of the anti-termite agent is preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the cement content. By increasing the content of the anti-termite agent, a better anti-termite effect is exhibited. By lowering the content of the anti-termite agent, it is possible to reduce the burden on the environment.

The second agent may also contain a component exemplified as a component other than cement in the above description of the first agent.
Each of the first agent and the second agent in the polymer cement coating material can be prepared by, for example, a well-known mixing method using a stirrer.

Next, an ant-proofing method for ant-proofing a building having a concrete foundation will be described.
The anti-termite method consists of a mixing step of mixing the first agent and the second agent of the polymer cement paint described above to prepare a mixture, and forming a protective coating layer containing the anti-termite agent on the concrete foundation using the mixed solution. It is provided with a protective coating layer forming step.

The mixing step can be carried out, for example, by a well-known mixing method using a stirrer. The protective coating layer forming step is a step of forming a protective coating layer by applying the mixture to the outer surface of the concrete foundation and then curing the applied mixture for a predetermined period of time. The method of applying the mixture is not particularly limited, and examples thereof include roller application using a roller.

The effects exerted by the above-described embodiments will be described below.
(1) The polymer cement coating material of the present embodiment is composed of a first agent and a second agent. The polymer cement paint is used for preparing a mixture of a first agent and a second agent at the time of use and applying the mixture to a concrete foundation of a building. The first agent is a powder composition containing cement. The second agent is a liquid composition containing a polymer, an aqueous dispersion medium for dispersing the polymer, and an anti-termite agent.

Here, for example, a through hole may be formed in the concrete foundation due to a crack generated in the concrete foundation, rust of the reinforcing bar embedded in the concrete foundation, or the like. According to the above-mentioned polymer cement paint, a protective coating layer composed of a cured product of polymer cement and containing an anti-termite agent can be formed on a concrete foundation. Therefore, it is possible to close the through holes of the concrete foundation with the protective coating layer and exterminate termites with the anti-termite agent contained in the protective coating layer. Therefore, it is possible to prevent termites from entering the concrete foundation. Further, since the protective coating layer contains a polymer, it has flexibility. As a result, for example, even when a crack or the like is further generated in the concrete foundation provided with the protective coating layer, the protective coating layer follows the outer surface of the concrete foundation and can cover the crack or the like. Therefore, the effect of blocking the invasion of termites is likely to be sustained.

(2) The polymer in the protective coating layer formed from the polymer cement paint exerts the effect of increasing the flexibility of the protective coating layer, but the polymer may reduce the diffusivity of the anti-termite agent. From the viewpoint of suppressing such a decrease in diffusivity, it is preferable that the first agent of the polymer cement coating material contains porous inorganic particles. In this case, since the protective coating layer formed from the polymer cement paint becomes porous, the diffusion of the anti-termite agent in the protective coating layer is easily promoted. Therefore, it is possible to enhance the immediate effect of the ant-proof effect.

(3) The anti-termite method is a method of anti-termite a building having a concrete foundation by using a polymer cement paint. The anti-termite method includes a mixing step of mixing the first agent and the second agent to prepare a mixture, and a protective coating layer forming step of forming a protective coating layer containing the anti-termite agent on a concrete foundation using the mixture. It has. According to this method, it is possible to prevent the invasion of termites in the concrete foundation.

(Change example)
The above embodiment may be modified as follows.
-The anti-termite agent may be contained only in the second agent or only in the first agent. Further, the anti-termite agent may be contained in both the first agent and the second agent. That is, the anti-termite agent can be contained in at least one of the first agent and the second agent.

-Porous inorganic particles can also be contained in at least one of the first agent and the second agent.
-The polymer cement coating material of the above embodiment is composed of a first agent and a second agent, but may be further provided with a third agent and changed to be used by mixing a plurality of these agents. That is, the polymer cement paint can also be composed of three or more agents. In this case, at least one agent selected from three or more agents may contain, for example, an anti-termite agent, porous inorganic particles, or the like. However, from the viewpoint of simplifying the mixing step at the time of use, the polymer cement coating material is preferably composed of two agents, a first agent and a second agent.

-The polymer cement coating material of the above embodiment may further contain a component for controlling pests other than termites.
-The first agent of the polymer cement coating material of the above embodiment may further contain a re-emulsified powder resin that becomes an emulsion by mixing with an aqueous dispersion medium.

Next, the technical idea that can be grasped from the above-described embodiment and modified example will be described below.
(A) A polymer cement coating material in which the anti-termite agent is contained in the second agent.
For example, when an anti-termite agent is blended with the first agent which is a powder composition, there is a concern that the anti-termite agent may be scattered in the air when preparing the mixture (during use), which may cause an environmental load. According to the above configuration, it is possible to suppress the anti-termite agent from scattering into the air during use, so that the load on the environment can be reduced.

(B) A polymer cement paint having a structure in which the anti-termite agent is contained as a microcapsule encapsulated in microcapsules.
According to this configuration, it is possible to prevent the anti-termite agent from being decomposed by the alkaline component. Thereby, for example, the sustainability of the ant-proof effect can be enhanced.

Next, Examples and Comparative Examples will be described.
(Examples 3, 4, 6, 7, Reference Examples 1, 2, 5 )
By mixing the components shown in Table 1, and the polymer cement paint each of Examples and Reference Examples were prepared. The unit indicating the blending amount in Table 1 is a mass part. A shirasu balloon was used as the porous inorganic particles in the first agent. The additive in the first agent is composed of 2 parts by mass of a dispersant, 2 parts by mass of a viscosity modifier, 1 part by mass of a water repellent agent, and 5 parts by mass of a film-forming auxiliary. The polymer emulsion in the second agent is an acrylic polymer emulsion (solid content: 50% by mass, Tg: −15 ° C.). The anti-termite agent is a neonicotinoid compound.

(Ant resistance test)
A test piece was obtained by applying the polymer cement paint of Reference Example 1 to the outer surface of a concrete piece to a thickness of 1 mm and then curing it for 7 days.

Quartz sand having a water content of 8% by mass was spread at a height of 2 cm in a plastic container with a lid, and then a test piece was placed on the quartz sand. Further, a piece of wood of 1 × 1 × 2 cm was placed on the test piece.
Next, an ant-proof test was conducted in which 150 Formosan subterranean termites were released on silica sand in a plastic container, the lid was closed, and the cells were left for 4 hours. The anti-termite test was also carried out in Examples 3, 4, 6 and 7 and Reference Examples 2 and 5 in the same manner.

The state of Formosan subterranean termite in each example was evaluated according to the following criteria, and the evaluation results are shown in Table 1.
Evaluation "5": 90% or more termite activity stopped Evaluation "4": 60% or more and less than 90% termite activity stopped Evaluation "3": 40% or more termite activity slowed down Evaluation "2" : 25% or more and less than 40% of termite activity slows down Evaluation "1": Termite activity is active

As shown in Table 1, the polymer cement paints of each example had an anti-termite effect. The polymer cement coating material of Example 4 is obtained by changing a part of calcium carbonate of Reference Example 2 to porous inorganic particles. The ant-proofing effect of Example 4 was higher than that of Reference Example 2.

Claims (2)

With multiple agents including the first agent and the second agent,
A polymer cement paint used for preparing a mixture of the plurality of agents at the time of use and applying the mixture to the concrete foundation of a building.
The first agent is a powder composition containing cement.
The second agent is a liquid composition containing a polymer and an aqueous dispersion medium for dispersing the polymer.
Among the plurality of agents, with the inclusion of anti-termite agents to at least one of the agents, one of said plurality of agent, by the inclusion of porous inorganic particles with at least one agent, and the termiticide to the mixture It has a structure containing the porous inorganic particles and has a structure.
The porous inorganic particle is a polymer cement coating material comprising at least one selected from alumina balloons, glass microballoons, silas balloons, fly ash balloons, mullite balloons, and vermiculite. A method for preventing ants in a building provided with a concrete foundation by using the polymer cement paint according to claim 1 .
A mixing step of mixing the plurality of agents to prepare a mixture, and
A method for preventing ants, which comprises a step of forming a protective coating layer containing the ant-proofing agent on the concrete foundation using the mixture.