JP2001299181A - Termite intrusion-preventing agent and method for preventing termite intrusion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a termite intrusion-preventing agent capable of surely preventing the intrusion of termites over a long period of time without the problem of environmental pollution or the like. SOLUTION: The intrusion of termites into a contact part is prevented by applying both of a termite-proofing agent and a latex-containing aqueous emulsion to the contact part of the under-floor structure of a building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a termite intrusion preventing agent used for a contact portion of a structure under a floor of a building. When the termite intrusion preventive agent of the present invention is used, in foundation work of a detached house or the like, a pipe penetrating through a foundation concrete (side surface of an independent foundation such as a cloth foundation or a bundle) and dirt concrete, or a foundation concrete or dirt concrete. An elastic and soft termite coating is formed on the abutting portion of the concrete, so that even if a gap is formed due to the shrinkage of the concrete, the coating covers the gap, so that termites can be prevented from entering. This is extremely useful in that it can be shut off.

[0002]

2. Description of the Related Art Conventionally, for the purpose of preventing termites from damaging buildings, termite-controlling chemicals have been sprayed on the floor substrate.
At the time of construction, a method of installing a so-called dovetail made of metal between slab concrete and foundation concrete has been used. However, in the former method of spraying a termite-controlling agent, the agent infiltrates the ground and contaminates the groundwater, and there is a problem of environmental pollution, such as the outflow of the agent due to flooding that has entered under the floor and the like, There is a drawback that it is difficult to maintain the termite-controlling effect of the drug for a long period of time. On the other hand, in the latter method of termite return, there is a problem that termites cannot effectively be prevented from bypassing the termite return and invading wooden members of the building.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to surely prevent termite invasion for a long period of time without problems such as environmental pollution. It is an object of the present invention to provide a novel termite intrusion inhibitor and a method for preventing termite intrusion.

[0004]

SUMMARY OF THE INVENTION The termite intrusion preventing agent of the present invention, which has solved the above-mentioned problems, is characterized in that a termiticide and a latex-containing aqueous emulsion are used in the abutment portion of an underfloor structure of a building. It has.

Further, the termite intrusion prevention method of the present invention, which can solve the above-mentioned problems, comprises applying a termite-controlling agent and a latex-containing aqueous emulsion to a contact portion of an underfloor structure of a building,
This has a gist in preventing termites from entering the contact portion. Here, prior to the application of the termite-controlling agent and the latex-containing aqueous emulsion, it is preferable to apply a two-component curable elastic polyurethane adhesive containing a termite-controlling agent to the contact portion of the underfloor structure of the building. is there.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have proposed a contact portion of an underfloor structure of a building, specifically, a contact portion between a side or a bundle (independent foundation) of a cloth foundation and concrete between slabs and the like. Termites can be effectively prevented from invading from gaps generated at the abutting portion between the finished pipe and the concrete between the soils [gap generated by shrinkage cracks (cracks) mainly due to drying of the soil concretes]. We've been eagerly examining the methods. As a result, the inventors of the present invention have provided an elastic rubber coating on the contact portion that has good adhesiveness to concrete, has elongational elasticity that follows contraction of concrete, and has a film thickness that does not break. It was found that the intended purpose could be achieved by forming the film, and further studies were made on materials capable of forming the film. Then, it was found that if a latex-containing aqueous emulsion in which latex was dispersed in an anti-termitic agent and water was applied, a desired rubber elastic film was formed after coating and drying, and the present invention was completed. That is, the termite intrusion preventing agent of the present invention has excellent adhesiveness to concrete,
It has good elongation elasticity that can follow the contraction of concrete, can form a coating film thickness that does not break, and is easy to handle and has excellent workability in application,
It has the feature that termites that invade the abutment between the foundation concrete and the earth concrete can be extremely effectively prevented.

The termiticide and latex-containing aqueous emulsion used in the present invention will be described below.

The latex-containing aqueous emulsion is a paste in which latex is dispersed in water, and contains water and latex as essential components. Here, the latex of the main agent used in the present invention is a natural rubber latex or a synthetic latex (a latex of styrene butadiene type, acrylonitrile butadiene type, acrylate styrene type, chloroprene type, polyvinylidene chloride type, polyvinyl acetate type, etc.) Regardless of the type, the material is not particularly limited as long as a desired rubber elastic film can be formed on the contact portion of the underfloor structure of the building. Representatively, styrene-butadiene copolymer latex, acrylonitrile butadiene copolymer latex, acrylate styrene copolymer latex, and the like can be given.

[0009] These latexes may be used alone or in combination of two or more. For example, as a preferable combination example, a combination use of an acryl-styrene copolymer resin and a styrene-butadiene rubber may be mentioned.
It is recommended to use these together in a weight ratio of 20:80 to 60:40. If it is less than 20:80, the rubber property will be too high, whereas if it exceeds 60:40, the desired rubber property will not be obtained, and the elongation of the dried coating film will be reduced.

The mixing ratio of acrylic and styrene in the acrylic / styrene copolymer resin of the above latex can vary depending on the type of acrylic resin used, and should be appropriately adjusted so as to obtain desired elongation characteristics and the like. It is. However, the weight ratio of acrylic and styrene is 70: 3
If it exceeds 0, the coated dry film becomes hard, and therefore it is recommended that the ratio be set to the upper limit. On the other hand, the mixing ratio of the styrene / butadiene rubber can vary depending on the type of the resin used and the like. However, if the weight ratio of styrene exceeds 45%, the desired rubber elasticity cannot be obtained. It is recommended to control the weight ratio of styrene to butadiene = 45:55.

It is necessary that the latex be present in the form of an aqueous emulsion dispersed in water. Thereby, when the termite intrusion preventing agent of the present invention is applied to the abutment portion of the underfloor structure of the building, the familiarity with concrete becomes good, and the dried film formed after evaporating and drying the moisture is It becomes a flexible rubber elastic film, and the adhesiveness to concrete is enhanced, so that invasion of termites can be effectively prevented.

Further, the termite intrusion inhibitor of the present invention includes:
It also contains termiticides for termite control. However, since concrete is strongly alkaline, a phosphorus-based termitic agent cannot provide a desired medicinal effect. Accordingly, termite-controlling agents that can provide a desired termite-controlling effect even when applied to concrete, for example, pyrethroid-like agents (such as silafluofen and etofenprox), pyrethroid-based agents (such as permethrin, allethrin, tralomethrin, and bifenthrin), and carbamate-based agents (Proboxur, Fenobucarb, Sevin, etc.), Triazines (Tripropyl isocyanurate, etc.), Chlornicotyls (Imidacloprid, etc.)
Use of such as is recommended.

In addition, extenders (such as aluminum hydroxide, calcium silicate, mica powder, and white carbon) can be added for the purpose of improving the thixotropic property and water resistance of the emulsion.

The termite intrusion preventing agent of the present invention may further contain an organic thickener (casein, sodium polyacrylate, cellulose derivative, polyvinyl alcohol, sodium alginate, guar gum, etc.), an inorganic thickener for the purpose of imparting viscosity. A thickener (bentonite, fine silica powder, etc.) can be added. Above all, it is recommended to use a stable thickener having such characteristics that the viscosity change due to temperature is small and the viscosity does not decrease even if left for a long time, and from such a viewpoint, the use of a cellulosic derivative is recommended. .

[0015] In addition, a commonly used additive can be added as long as the action of the present invention is not impaired. Specifically, for example, a pigment [inorganic pigment (aluminum hydroxide,
Coloring pigments such as titanium oxide and carbon), organic pigments (such as phthalocyanine blue)], pigment dispersants (such as sodium tripolyphosphate), fillers (calcium carbonate, clay, and the like).
Aluminum hydroxide, talc, silica, diatomaceous earth, etc.), dispersants (sodium polyacrylate, sodium hexametaphosphate, etc.), anti-aging agents (aldehyde, ketone, amine reaction products and their derivatives, etc.), antiseptic and antifungal agents [ Cyclic nitrogen-sulfur compound (BIT: 1,2-Benzisotyiazolin-3)
-one), isothiazoline compounds, etc.], tackifiers (petroleum hydrocarbon resins, natural rosins, hydrogenated rosin esters, etc.) and the like.

The mixing ratio of these components is as follows: water: 30 to 70% by weight (more preferably 40 to 60% by weight), latex (as a solid component): 20 to 70% by weight (more preferably 35 to 60% by weight). , Thickener: 0.2-2.5% by weight
(More preferably 0.3 to 2% by weight), termiticide: 0.0
3 to 3% by weight (more preferably 0.05 to 1% by weight),
Extender: 10 to 30% by weight (more preferably 12 to 2% by weight)
0% by weight) and other additives: each is preferably controlled to 1% by weight or less. Above all, the mixing ratio of water, latex and thickener depends on the structure (concrete etc.) at the time of coating.
This is particularly important from the viewpoints of improving the compatibility between the film and the dried film after coating and the adhesiveness between the structure and the structure. If the water content is less than 30% by weight, the hardness of the aqueous emulsion becomes high, and application is difficult. On the other hand, if the water content exceeds 70% by weight, the thickness of the dried coating film becomes thin, and the film strength becomes weak.

Preferred examples of the termiticide and latex-containing aqueous emulsion used in the present invention are shown below. Needless to say, the following compositions are merely representative examples and are not intended to limit the present invention. Water: 42 to 45% (% means weight%, the same applies hereinafter) Thickener (cellulosic derivative): 0.6 to 0.7% Termiticide (silafluofen): 0.05 to 0.2% Preservative Antifungal agent: 0.1% or less [cyclic nitrogen sulfur compound (BIT)] Acrylic / styrene copolymer resin: 15 to 17% Styrene / butadiene rubber: 22 to 24% Extender pigment (aluminum hydroxide): 15 to 15% 17% Color pigment (titanium oxide / carbon): 1.0% or less Pigment dispersant (sodium tripolyphosphate): 0.1% or less

Incidentally, the present inventors conducted a quality test slump test of JISA 5758 (building sealing material) in order to compare and evaluate the excellent flowability of the above emulsion with a commercially available acrylic sealing material.

As a result, when the example of the present invention was used, 35 ° C. ×
After hanging for 200 minutes in 20 minutes, even if the surface was dried, no falling was observed. In fact, the water-soluble emulsion of the present invention was found to have a sagging (falling) length in the slump test at 35 ° C. for 20 minutes, satisfying the range of 100 to 400 mm. Hanging length is 100mm
In the following, it did not break into concrete, while 400
If it exceeds mm, it becomes fluid and it is difficult to form a film of a predetermined thickness on concrete.

On the other hand, when a commercially available acrylic sealing material was used, no dripping (flowing) was observed at 35 ° C. × 6 hours, and the surface was dry after 1 hour.

A water-soluble emulsion having such a composition is typically applied to a joint part after facilities and curing of basic concrete and soil concrete, and the physical properties of the aqueous emulsion are as follows. At this time, it is preferable to have a viscosity having an appropriate thixotropy that does not flow out and can enter a small amount into a joint portion, and specifically, 5,000 to 200,000 mPa · s (more preferably 30,000 mPa · s). mPa · s or more and 100,000 mPa · s or less)
It is preferable to have a viscosity of Further, the penetration (JIS K 2207) of the dried coating film is preferably 20 or more (more preferably 30 or more), and the elongation is preferably 100% or more (more preferably 200% or more).

Hereinafter, the usefulness of the termite intrusion preventing agent of the present invention will be described by taking, as an example, an embodiment in which the termite intrusion preventing agent is applied to the upper corner of a joint between a vertical foundation concrete and a flat earth concrete. explain.

First, let us assume a case in which the termite intrusion preventive agent of the present invention is applied in a dry state of concrete, and then cracks occur at the seam. Even in this case, since the termite intrusion preventing agent of the present invention is used,
At the time of coating, the coating with good compatibility with concrete, and the dry coating formed after moisture evaporation to dryness has good adhesion to concrete, so even if cracks occur at the joints, No cracking or breakage occurs, and the invasion of termites can be effectively prevented. On the other hand, when the termite intrusion preventing agent of the present invention is not used, a desired dry film (rubber elastic-like film) is not formed, so that the film breaks down following cracks in concrete and can follow cracks. There is also a risk that the coating may be peeled off. On the other hand, when a liquid is used instead of an aqueous emulsion as in the present invention, the liquid flows out even if it is applied to a coating part, and only a thin film is formed. May fail. Further, when the solvent type is used, it is well compatible with concrete at the time of coating, but has problems such as flammability, odor and toxicity.

Next, suppose a case where the termite intrusion preventing agent of the present invention is applied in a state where the concrete has dried and cracks have already occurred in the joints. Even in this case, if the termite invasion preventive agent of the present invention is used, termite invasion can be effectively prevented. That is, for example, when the width of a crack is wide, the termite intrusion preventive agent of the present invention can easily flow into the gap, while when the width of the crack is narrow, a thick dry film is formed on the surface. Therefore, in any case, invasion of termites can be effectively prevented. On the other hand, when a liquid is used instead of an aqueous emulsion as in the present invention, if the width of the crack is narrow, an air layer is formed in the gap portion and does not flow in, and a thin dry film is formed only on the surface layer. Easy to do. on the other hand,
In the case of the solvent type, it flows in irrespective of the width of the crack, but since only a thin film is formed, the durability is poor.

As described above, an excellent termite intrusion prevention effect can be obtained by using the termite intrusion preventive agent of the present invention. However, in order to further improve the above-mentioned action, prior to the application of the emulsion, the underfloor of the building is used. It is a preferred embodiment of the present invention to apply a two-component curable elastic polyurethane adhesive to the contact portion of the structure with the termite sheet.

The two-part curable polyurethane adhesive is known as a strong elastic adhesive and has the following advantages. The compound when mixing two liquids has low viscosity and good wettability,
It has a moderate thixotropy that allows a small amount to enter the gaps at the joints, so it does not easily flow down even when applied to vertical parts such as foundation concrete, etc.It also has excellent adhesion to concrete after hardening, preventing termite invasion It is suitable for. The adhesive force between the termite-proof sheet / moisture-proof sheet and the base concrete after application of the adhesive is as large as 2 kg / inch or more, and it is hard to peel off from the base concrete. Since it is quick-drying, it has the advantage that soil concrete can be poured shortly after bonding the foundation concrete and the finished part of the termite sheet, and the construction period can be shortened. Since it has flexibility after curing, cracking and cracking due to external stress (such as vibration) do not occur, so that the termite-controlling effect can be maintained. It is excellent in safety and environment, and has good workability.

Next, the composition of the termiticide-containing two-component curable polyurethane adhesive used in the present invention will be described. The adhesive contains the termite-controlling agent, main agent, and curing agent described above. Among these, the main agent includes a reactive component with the curing agent, a plasticizer for obtaining a predetermined hardness, a thixotropic agent, a curing accelerator, and the like. including.

Here, the above reaction components include polyether polyol, polyester, acrylic polyol,
Castor oil derivatives, tall oil derivatives, and other hydroxyl-containing compounds. Examples of the plasticizer include process oil, phthalic acid ester, phosphoric acid ester, and aliphatic base acid ester. Examples of the thixotropy-imparting agent include surface-treated calcium carbonate and ultrafine anhydrous silica; examples of the curing accelerator include amine-based curing accelerators and metal-based curing accelerators.

As the curing agent used for the two-part curable polyurethane, tolylene diisocyanate (T
DI), diphenylmethane diisocyanate (MD
I), hexamethylene diisocyanate (HMDI) and the like. When weather resistance is required, these hydrogenated products can be used.

In order to use the above two-component curable polyurethane to effectively exhibit the desired action, the initial viscosity must be 5-10.
10,000 mPa · s, TI value (thixotropy index) 3-5, penetration (JIS K 2207) 30 or more,
The elongation is preferably controlled to be 200% or more. For this purpose, the above-mentioned reaction components are 10 to 70% by weight, the plasticizer is 10 to 60% by weight, and the thixotropy-imparting agent is 1 to 70% by weight.
It is recommended to add 60% by weight and 1 to 10% by weight of a curing accelerator, respectively.

Preferred examples of the termiticide-containing two-component curable polyurethane adhesive used in the present invention are shown below. Of course, the following compositions are only typical examples, and are not intended to limit the present invention.

(1) Composition of Main Agent Reactive component: Polyether polyol (PPG) Molecular weight: about 3,000 Hydroxyl value: 56.6 KOH mg / g Plasticizer: Process oil Viscosity: 50 mm ² / s (40 ° C.) Aniline point: 15 ° C Thixotropy-imparting agent: Surface-treated calcium carbonate Average particle size (μ): 0.07 Ultrafine anhydrous silica: Aerosil 300 Curing accelerator: Metal octylate Termite-proofing agent (silafluofen) (2) Curing agent A prepolymer of TDI and PPG having the following physical properties was used. NCO / OH = 1.3 Molecular weight: about 3,000 NCO = 3% (3) Preparation method After sufficiently kneading PPG, process oil, surface-treated calcium carbonate, and metal octylate, a prepolymer of a curing agent is blended. And further mixed until uniform.

The termite sheet used in the present invention is not particularly limited as long as it is a termite sheet used for termite control, and it is also recommended to use a termite / moisture-proof sheet that also serves as moisture proof.

Next, the termite intrusion preventive agent of the present invention (hereinafter sometimes abbreviated to “termite paste”) and, if necessary, a two-part curable elastic polyurethane adhesive (hereinafter, referred to as “the termite paste”).
A typical example applied to termite-proofing work on the floor surface of a building using an “elastic adhesive” may be described.

First, the end of the termite sheet is set up on the side surface of the fabric base. Next, concrete is poured into the slab, and when the slab is dry, the abutment of the present invention is applied to the abutment of the cloth foundation or bundle (independent foundation) or the side of the rising pipe and the surface of the slab concrete. It is recommended to apply ant paste. Of course, the termite-proof paste may be applied to the abutting portion in a state where the concrete is freshly dried (the surface is hardened to some extent and a semi-dry state which does not hinder the work).

Further, the termite intrusion prevention method of the present invention will be described in detail with reference to FIGS. The following method is merely an example of the method of the present invention, and it is needless to say that the present invention is not limited thereto.

First, as shown in FIG. 1, an elastic adhesive 2 is applied to the concrete cloth foundation 1 (the inner side of the foundation), and a termite / moisture proof sheet 3 is laid on the foundation and the ground is installed. The ant / moisture proof sheet 3 and the cloth base 1 are bonded to the elastic adhesive 2
Glue without gaps. As a result, there is no gap between the sheet 3 and the cloth foundation 1 where termites can enter. Next, after fixing the base edge with a fixing member such as a nail, another termite / moisture proof sheet 3 'is spread over the entire surface, and the seams of the sheets 3, 3' are continuously attached with joint tape 4 or the like. Process.

Next, as shown in FIG. 2, after concrete is poured and solidified, a termite paste 5 is applied between the cloth foundation 1 and the concrete. In the figure, reference numeral 6 denotes a pipe near the foundation. As a result, a desired elastic coating is formed, so that it is possible to follow shrinkage during the drying of concrete between soils. In addition, it is extremely useful to apply the termite-preventive paste 5 around the pipes near the foundation because the effect of preventing termite invasion is further enhanced.

For the rising pipe section, a cut is made in the termite / moisture proof sheet 3 in accordance with the pipe section, and the pipe is passed through the pipe. If the elastic adhesive 2 is applied around the rising edge of the piping before the termite / moisture proof sheet 3 is inserted into the piping, the termite intrusion prevention effect is further enhanced. Next, after the concrete is poured and solidified, the above effect is further improved by applying an anti-termite paste 5 around the pipe.

The dog running part (outside part) is coated with the elastic adhesive 2 in the same manner as the cloth base part, and the termite / moisture proof sheet 3 is applied.
It is advisable to lay it on the foundation. At this time, it is recommended that the termite-proof and moisture-proof sheet 3 and the cloth base 1 be adhered to each other with an elastic adhesive 2 without any gap. As a result, the termite / moisture proof sheet 3 and the fabric base 1 are firmly adhered to each other so that a gap cannot be formed.
As a result of the desired effect being exhibited to a high degree, the trouble of injecting the termiticide solution into the rising part of the base after that becomes unnecessary.

[0041]

Since the present invention is constructed as described above, there is no problem of environmental pollution and the like, and a new termite can be reliably prevented for a long period of time without using chemicals. A termite intrusion inhibitor and a method for preventing termite intrusion can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of an execution step of a construction method according to the present invention.

FIG. 2 is a schematic explanatory view showing one embodiment of an execution step of the termite mitigation construction method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete cloth foundation 2 Elastic adhesive 3 and 3 'Termite-proof / moisture-proof sheet 4 Joint tape 5 Termite-proof paste (termite intrusion prevention agent) 6 Base-end pipe

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shiho Hasegawa 1-23-3 Oi, Shinagawa-ku, Tokyo Fukubi Chemical Industry Co., Ltd. Tokyo Branch F-term (reference) 2B121 AA16 BB25 CC02 CC21 CC34 EA05 EA22 FA12

Claims (3)

[Claims] 1. A termite intrusion preventive agent comprising using a termiticide and a latex-containing aqueous emulsion in a contact portion of an underfloor structure of a building. 2. A method for preventing termite invasion, comprising applying a termiticide and a latex-containing aqueous emulsion to a contact portion of an underfloor structure of a building. 3. A two-part curable elastic polyurethane containing a termite-controlling agent at a contact portion with a termite-controlling sheet formed on an underfloor structure of a building prior to the application of the termite-controlling agent and the aqueous emulsion containing latex. 3. An adhesive is applied.
The method described in.