JPS6361282B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD This invention relates to a method for forming an anti-termite layer using an anti-termite soil treatment agent that prevents termites from reaching buildings, wooden pillars, cables, etc. through soil or concrete and causing damage thereto. That is, a small amount of an anionic emulsion is added to an asphalt emulsion, and a cationic emulsion that is cationically modified using an alkylamine derivative having a nonionic organic hydrophilic group at one end is added, and an effective amount of an anti-termiticide is added and mixed. The aqueous slurry is sprayed on the soil and forms an effective anti-termite layer by strongly adhering to the soil. Conventional technology Conventionally, termites often invade buildings, wooden pillars, and cables from underground and cause damage, so termite prevention measures generally involve building around the concrete foundations of buildings, bundled stones, etc., and other areas where termites can invade. Water-soluble termiticides are sprayed directly onto the soil and concrete in areas where there is concern, but these water-soluble termiticides not only make the area under the floor humid, but can also directly enter groundwater.
It has disadvantages such as rainwater flowing into rivers, ponds, and underground water, reducing its anti-termite effect and causing environmental pollution. There is also resin asphalt emulsion, which is made by blending an asphalt emulsion, in which asphalt is made into fine particles and dispersed in water by the action of a surfactant, with an emulsion in which fine resin particles are similarly dispersed in water, but the particles are negatively charged. It is anionic and therefore the surface of most things, such as soil particles, becomes negatively charged when moisture is present, which repels each other and makes it difficult for it to penetrate between soil particles and other small gaps, preventing termites from entering. cannot form an anti-termite layer. Furthermore, when using a simple cationic activator that does not contain nonionic organic hydrophilic groups, it was confirmed that when the cationized emulsion was added to asphalt to form a slurry, partial aggregation of the resin slurry particles occurred. has been
It is clear that even if a termiticide is added to such a slurry, an effective termite-proofing layer cannot be formed. Problems to be solved by the invention The present invention solves these problems.
The present invention provides a method for forming an anti-termite layer using a soil treatment agent that retains the ability to prevent termites for a long period of time. Means for Solving the Problems The anionic emulsion used in the present invention may be either a natural resin latex or a synthetic resin latex. In the case of synthetic resin, commercially available acrylic ester or styrene,
Emulsions such as butadiene are common and easily available. As a cationic activator for cationizing this anionic emulsion, it is effective to use an alkylamine derivative having a nonionic organic hydrophilic group at one end, and examples of this nonionic organic hydrophilic group include polyoxyethylene, etc. This is a major feature. In other words, the reason why cationic emulsions have good results is that the cationic particles of the synthetic resin latex are uniformly electrostatically adsorbed to the slurry particles such as asphalt, and the slurry particles such as asphalt, which are easily coagulated by this resin coating, are nonionic. Solidification is prevented by the organic hydrophilic groups, resulting in a stable slurry state.
Next, when this slurry comes into contact with soil, the resin coating exhibits its coagulability, and is thought to form an effective termite-prevention layer. This creates a strong bond with the soil, and even if the soil changes to sandy or clay, the slurry will remain at a depth of about 3cm to 10cm from the topsoil.
When water-soluble termiticides are directly sprayed as in the past, or as with other emulsions, they penetrate underground and form an anti-termite layer. It is an anti-termite soil treatment agent that can be used with peace of mind as there is no risk of reducing the ant effect or causing environmental pollution. Function The aqueous slurry that forms the termite-proofing layer consists of a cationic synthetic resin emulsion (solid content approximately 65%) and a cationic asphalt emulsion (asphalt content approximately 60%). Blend to approximately 10%. This mixing ratio can be freely changed depending on whether the soil particles forming the anti-termite layer are sandy or clayey. As a termiticide, chlordane from Velsicol in the United States has test data showing effective preventive effects and residual efficacy against termites at the U.S. Department of Agriculture Southern Forest Products Experiment Station, and is certified by the Japan Termite Control Association. This is used by thoroughly stirring and mixing 2% of the total solid content. When using a termite control agent other than chlordane, it is mixed in an amount that maintains the insecticidal effect of the agent. The slurry thus obtained is uniformly spread over the soil by a spraying method or the like to form an anti-termite layer. Examples Next, examples of the present invention will be shown. For termite effectiveness testing, the aqueous slurry that forms the termite layer uses styrene-butadiene rubber latex (about 65% solids) as an anionic emulsion, with a nonionic organic hydrophilic group at one end to make it cationic. 90 parts of a cationic asphalt emulsion (asphalt content 60%) are thoroughly mixed with 10 parts of a cationic rubber emulsion cationically modified using a cationic activator in which polyoxyethylene is bonded to an alkylamine with a In contrast, 2 parts of termiticide were added. The termiticide used was chemical name: 0.0-diethyl-0(0-cyanobenzylideneamino) thiophosphate (molecular formula: C12 H15 N203 P S) and chemical name: 1.1. 1.2.6.7.7.7-Octachloro-4
- Oxaheptane (molecular formula C6 H60 C18) is mixed with it to give it a synergistic effect, and it is a well-known drug that maintains an effective insecticidal effect. The major feature of this anti-termite soil treatment agent, which is made into an aqueous slurry, is that it is cationic.Firstly, by increasing the rubber content, physical properties such as adhesive strength, water resistance, and crack resistance are quantitatively improved. Second, it has the effect of filling minute gaps on the surface of soil, wood, etc. that get wet with moisture and have anionic properties, and the resulting coating film has a very low moisture permeability coefficient and does not allow water to pass through. It has characteristics. Thirdly, when sprayed on the ground surface, it does not penetrate deep underground and forms an anti-termite layer under the surface, so there is no risk of groundwater contamination. Experimental results also showed that the thickness of the anti-termite layer was approximately 3 cm. In order to test termite effectiveness against termites, the experimental method involved uniformly spraying an anti-termite soil treatment agent over a 50 cm square area of the ground around a nest of termites to form an anti-termite layer approximately 3 cm deep. About 40cm high in the middle of its anti-termite layer
A bottomless can with a diameter of approximately 30 cm was placed, and a piece of pine horn (10 x 10 x 20 cm) was placed inside the can and the lid was placed. Cans and pine horn wood were placed in a similar area where no other soil treatment agent was sprayed, and this was used as an untreated area. These treated and non-treated areas were randomly installed at intervals of 1 m or more around the nest of Japanese termites, and after being left for about 6 months, it was further determined whether the termites had reached the pine horn inside the can from underground. The presence or absence of damage to pine wood was observed. Regarding the evaluation of the effectiveness of the termite control test, if there was no evidence that termites had invaded the experimental can and the pine horn wood had not suffered any damage, it would be marked with an ○, and if termites had invaded and damaged the pine wood even slightly, it would be marked with an ○. The items were marked with an x mark. It should be noted that it was not possible to clearly determine the mark. As shown in the table below, the termite control test results show that almost all of the pine horn in the untreated area suffered termite damage, but in the treated area, no termite invasion or feeding damage was observed, indicating that termites from underground were completely eliminated. could be prevented.

[Table] Effects of the invention The effects of the invention are as shown below. (1) Termites cannot feed on or pass through the termite-proof layers formed around buildings, wooden pillars, and underground cables, and they can be killed by just coming into contact with the termite-proof layer, so termites should not be used underground. It can completely prevent termites from spreading. It is also effective in controlling other pests such as cockroaches, spiders, mites, etc. that live under the floors of buildings and underground. (2) Even with termiticides that are highly toxic to humans,
Since it is uniformly contained throughout the termite-proofing layer, it is highly safe for the human body and can maintain its termite-proofing effect for an extremely long time. Furthermore, this anti-termite layer prevents the anti-termite chemicals from flowing into groundwater or being run off by rainwater, thereby preventing environmental pollution. Furthermore, since it prevents moisture from entering underground, buildings and other wood materials can be prevented from absorbing moisture and rotting, extending their durability.

Claims (1)

[Claims] 1. A cationic rubber emulsion obtained by cationically modifying an anionic emulsion using an alkylamine derivative having a nonionic organic hydrophilic group at one end and a cationic asphalt emulsion are mixed, and an effective insecticidal effect is maintained for the total amount. A method in which an anti-termite agent is added at a certain percentage to form an aqueous slurry, and an anti-termite soil treatment agent made from this slurry is used to form an anti-termite layer.