JPH04316502A - Building method for spraying termite and moisture-preventing coating - Google Patents

Abstract

PURPOSE:To provide a termite- and moisture-preventing building method having a high termite-preventing property and a high residual activity, safe for workers and residents, requiring a relatively simple work and capable of being simply applied to building sites. CONSTITUTION:A termite and moisture-preventing building method is characterized by mixing a polyol component as a component for a polyurethane resin with a termite-preventing agent and a rapid curing agent, mixing the mixture solution with an isocyanate component as the another component for the polyurethane, spraying the produced termite and moisture-preventing agent on the surface of the footing of a building and the surface of the ground around the footing and on the surfaces of target articles for the termite prevention, and curing the sprayed agent to form the cured coating films of the urethane polymer.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a termite-proofing and moisture-proofing spray construction method for buildings, which can prevent termite damage to buildings over a long period of time, and which is safe for humans and livestock and has excellent workability. It is something.

0002

[Prior Art and Problems to be Solved by the Invention] Conventionally, in order to prevent termites in buildings, organic chlorine insecticides (chlordanes), which have a strong anticide effect and a high residual effect, have been applied to the wood of buildings. The main methods used have been to apply, spray, or spray the soil on the subbed soil.

However, in September 1986, chlordenes were designated as specified chemical substances and could no longer be used because they were toxic to humans and animals and polluted the environment.Currently, organophosphorus, naphthalene, and Relatively safe drugs such as triazine, pyrethroid, carbide, and boron are used. However, these chemicals are not completely safe for workers and residents, and there is a high possibility that they will become poisoned if they are sprayed or sprayed in small spaces such as under floors or attic spaces every day.

[0004] In addition, these drugs have considerably inferior termite-preventing efficacy compared to conventional drugs, have low residual effects, and do not last long. In addition, the termiticides currently in use are easily decomposed at high temperatures, and most of the chemicals added to general thermosetting resins are thermally decomposed and lose or reduce their antitermitizing effect.

[0005] Therefore, an invention related to a ``method for constructing termite-proofing material'' was published in Japanese Patent Application Laid-Open No. 6-1999, in which a termite-proofing agent is added to a polyurethane resin to prevent the loss and deterioration of the termite-proofing effect due to thermal decomposition.
It is disclosed in Japanese Patent No. 2-236937. However, since the construction method disclosed in the publication uses polyester polyol as the polyol component, it is easily hydrolyzed by water, and the formed film becomes crumbly over time and is susceptible to attack by mold and bacteria. There are some easy drawbacks. In addition, the polyurethane resin described in the same publication takes a long time to harden, at 3 to 6 hours.
Overall work cannot be done efficiently.

[0006] The present invention was made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide high anti-termite properties and high residual effectiveness, to be safe for workers and residents, and to improve work efficiency. To provide an anti-termite and moisture-proof spray method that is relatively simple and can be easily applied on site.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the anti-termite and moisture-proof spray method according to the present invention is a mixture of a polyol component, which is a polyurethane resin component, mixed with a termite control agent and a quick-curing hardening agent. A chemical solution is obtained by mixing the liquid and an isocyanate component which is a polyurethane resin component.
The first invention is an anti-termite and moisture-proof spray method, which is characterized by spraying this chemical solution onto the foundations of buildings, the surrounding ground surface, and the surface of anti-termite objects and curing it to form a cured film of urethane polymer. In the first invention, the second invention is an anti-termite and moisture-proof spray method in which the polyol component is an ether polyol.

[0008]

[Function] In the above structure, since the termiticide is contained in the urethane resin, it will not be washed away by rainwater, etc., and is highly safe. Furthermore, since the termiticide does not flow out, the concentration of the termiticide does not decrease, and a high termiticide effect can be achieved by simply spraying only in the necessary area.

In addition, since it is based on a fast-curing urethane resin, the film formation time is extremely short, and it is easier to carry out termite prevention work than with conventional urethane resin-based chemicals. Termite treatment time is significantly reduced.

Furthermore, since the termiticide is contained in the urethane resin, no unpleasant odor from the chemical remains after application.

Furthermore, by using an ether type polyol component in the urethane resin component, the durable life of the spray coating becomes almost semi-permanent, and the anti-termite effect can be maintained for a long period of time.

0012

[Examples] Examples of the present invention will be described below.

Example 1 Rim spray F-1000, a fast-curing urethane resin
Termiticides C (chlorbirifos 2%), H (phoxim 2%), G (tetrachlorvinphos 4%) or T (boron compound 4%) are added to the polyol component side of the A/B system (manufactured by Mitsui Toatsu Chemical Co., Ltd.). ) were prepared in a mixture of 2 to 4%. On the other hand, 30 x 30 x 2 pieces of pine wood that termites prefer
100 pieces of 0 mm were prepared. And termiticide C, H, G
Alternatively, 10 test pieces were prepared for each chemical solution by spray coating the entire surface of the pine wood pieces to a thickness of about 1 mm with each of the above chemical solutions added with T. Additive-free fast-curing urethane resin about 1
The entire surface was spray coated to a thickness of mm. No treatment was applied to the remaining 50 pieces of pine wood. In addition, the spray machine at this time was glass-
The RIM series manufactured by Kraft has a static pressure of approximately 140 kg/
cm2, spray pressure is 105 to 119 kg/cm2, and the liquid temperature is 50℃ for A liquid and 60℃ for B liquid.
and the current of the hose heater was 5A. Also,
The spray gun used was a Probler gun.

[0014] In order to confirm the anti-termite effect, a feeding damage test by house termites was conducted. The test method involved placing 5 test pieces each coated with urethane resin and 5 untreated test pieces in a styrene container (inner diameter 95 x 60 x
20 mm (hereinafter referred to as "test piece case"),
I put the lid on. A total of 46 circular holes each having a diameter of about 5 mm were bored throughout the entire surface of each test piece case. and,
These test specimen cases were transferred from April 10, 1989 to
Until October 25, 1990, for about 1.5 years, the test piece was buried around a nest of Japanese termites in a pine forest in Fukiagehama, Hioki District, Kagoshima Prefecture, and termites were allowed to enter through the circular hole in the test piece case.
A method was used to damage the internal test piece.

Furthermore, as a result of examining the dispersion status of each termiticide in the urethane resin according to the present invention by DEX (energy dispersive X-ray spectroscopy), it was found that each termiticide was uniformly dispersed in the resin. confirmed.

The results of the termite damage test are shown in Table 1 below. In Table 1, ◯ indicates that there was no feeding damage at all, △ indicates that there was very little feeding damage, and × indicates that there was severe feeding damage.

[0017]

[Table 1]

As is clear from Table 1, the termites used in the termite damage test were extremely active, and most of the untreated pine wood pieces were severely damaged. On the other hand, none of the products according to the present invention coated with a fast-curing urethane resin containing a termiticide added had any damage, and exhibited extremely high termite-proofing properties.

Furthermore, when coated with a quick-curing urethane resin without the addition of termiticides, only 2 out of 10 test pieces suffered from very slight eating damage. It is thought that it has physical and chemical properties that make it difficult to be eaten by termites even without addition. and,
The results of this experiment revealed that by adding a termiticide to this fast-curing urethane resin, the termite-proofing properties were further improved.

Example 2 Vitec PU-0309, a fast-curing urethane resin
/PU-0310 (manufactured by Sumitomo Bayer Urethane) 2 to 4 of the above termiticide C, H, G or T on the polyol component side.
Four types of chemical solutions were prepared by mixing %. On the other hand, the total length is about 12
Sixty specimens were prepared by masking both ends of a vinyl chloride resin cable measuring 0 mm x 6 mm in diameter by spraying zinc.

[0021] Each chemical solution containing termiticides C, H, G, or T was applied to the vinyl chloride portion of this cable to a depth of about 1 mm.
For each chemical solution, 10 test specimens were prepared by spray coating the entire surface to a thickness of The remaining 10 cable specimens were left untreated. The spray machine used at this time was a Unipre M series with a dynamic pressure of approximately 3 kg/cm2.
2 liquids are supplied, and 2 liquids are supplied with
The liquid was sprayed using a mixed air spray method. The liquid temperature was set at 50°C for both liquid A and liquid B in the heat exchanger of the main body, and the current of the hose heater was set at 2A.

[0022] In order to confirm the anti-termite effect, a feeding damage test by house termites was conducted. In the termite damage test, in order to attract termites and make it easier to damage the test piece, a strip of about 5 mm wide and about 4 mm thick was placed on the side of each test piece.
, Four pieces of pine wood each 80 mm in length were tied together with wire. The test piece prepared in this way was tested on April 2, 1990.
On the 5th, they were buried at random around a nest of Japanese termites in a pine forest in Fukiagehama, Hioki District, Kagoshima Prefecture, and the termites were allowed to eat them. Then, on November 14th of the same year, the site was excavated and recovered, the soil was washed off, and the presence or absence of termite damage was examined.

[0023] The results of the termite damage test are shown in Table 2 below. In Table 2, ◯ indicates that there was no feeding damage at all, and × indicates that there was severe feeding damage.

[0024]

[Table 2]

As is clear from Table 2, many of the untreated cables were damaged by termites, but none of the cables according to the present invention, which were coated with a fast-curing urethane resin containing a termiticide, were damaged by termites. It showed extremely high termite resistance.

Furthermore, even when coated with a quick-curing urethane resin without the addition of termiticides, termite damage was observed in only 1 out of 10 test pieces. It has become clear that the resin has quite high termite-proofing properties even without the addition of termiticides. On top of that,
The results of this experiment revealed that by adding a termiticide to this fast-curing urethane resin, the termite-proofing properties were further improved. In addition, as a result of this experiment, the anti-termite and moisture-proof spray method of the present invention is a means of preventing termites not only for buildings but also for various cables and wires, as well as articles and materials that are at risk of being attacked by termites. It turns out that it can be applied as well.

[0027]

[Effects of the Invention] According to the anti-termite and moisture-proof spray method of the present invention, two liquids are mixed at the time of construction: a mixture of a polyol component, which is a urethane resin component, a termite control agent, and a quick-curing curing agent, and an isocyanate component. Because it is spray applied to the surrounding sides of concrete foundations and the surface of the subfloor, which are the entry route for termites, and is quickly cured to form a hardened urethane polymer film, there is no risk of the termite control agent being washed away by rainwater, etc., as with conventional methods. It is extremely safe, as it does not cause pollution problems due to unnecessary release of a large amount of termite control agent, nor does it cause harmful effects on the human body due to workers inhaling the termite control agent needlessly during construction. Furthermore, since the termite control agent does not flow out, its concentration does not decrease, and the termite control effect can be sufficiently exerted by simply spraying the termite control agent to the necessary area, and the effect can be maintained for a long period of time.

Furthermore, since it is based on a fast-curing polyurethane resin, it can be easily sprayed onto side walls and, if necessary, the ceiling surface, making it easy to obtain a coating with an anti-termite effect.

Furthermore, since the termiticide is contained in the urethane resin, there is no need to worry about the unpleasant odor of the chemical after application.

Furthermore, by using an ether type polyol component in the urethane resin component, the weather resistance, antibacterial properties, and anti-mold properties are improved, so the life of the coating is dramatically improved, and the anti-termite effect is maintained for a long period of time. can do.

[0031] The anti-termite and moisture-proof spray method according to the present invention can be extremely easily applied to both new and existing houses and buildings, and has the effect of reducing the total construction cost. Furthermore, the anti-termite and moisture-proof spray method of the present invention can be widely applied to protect not only buildings but also various cables, electric wires, and other articles and materials that are at risk of being eaten by termites from termite damage.

Claims (2)

[Claims] Claim 1: A chemical solution is obtained by mixing a mixture of a polyol component, which is a polyurethane resin component, a termite control agent and a quick-curing curing agent, with an isocyanate component, which is a polyurethane resin component, and this chemical solution is used in construction. An ant- and moisture-proofing spray method characterized by spraying and curing the foundation and surrounding ground surface of objects and the surface of anti-termite objects to form a cured film of urethane polymer. 2. The anti-termite and moisture-proof spray method according to claim 1, wherein the polyol component is an ether polyol.