JP4999310B2 - Flying pest repellent - Google Patents

Description

The present invention relates to a flying insect repellent.

Conventionally, a method of applying a repellent containing diet (N, N-diethyl-toluamide) to the skin surface against flying pests such as mosquitoes, moths and chironomids has been widely used. In comparison, the volatility is somewhat low, so a spatial repellent effect cannot be expected.
Therefore, there are some proposals to use volatile natural essential oils and their components as repellent components. For example, it is well known that citronella oil and its main component citronellal have a repellent effect on mosquitoes, and candles containing citronella oil as an active ingredient are commercially available in the United States. However, the method of dissipating citronellal using the heat of the candle has poor volatilization efficiency of citronellal and cannot provide a practical repellent effect.
JP-A No. 2002-173407 describes a flying insect repellent containing, as an active ingredient, a natural essential oil selected from orange oil, cassia oil and the like in addition to citronella oil, and JP-A No. 2003-201203. The gazette includes citronellal as a pest repellent component (A) and one or more selected from terpineol, menthol, limonene, geraniol, citronellol, camphene, etc., and citronellal in pest repellent component (A) A pest repellent volatilization composition having a content of 2 to 10% by mass is disclosed. Although these repellents urge the attention to natural products and safety, their repellent effects are not always satisfactory. Further, there is a document disclosing the flying insect repellent effect of linalool as disclosed in JP-A-11-171703, but the flying insect repellent effect of the modified alcohol is not known at all.
Japanese Patent Laid-Open No. 2002-173407 JP 2003-201203 A Japanese Patent Laid-Open No. 11-171703

An object of the present invention is to provide a flying pest repellent which contains a pest repellent component more useful than citronellal and exhibits an excellent repellent effect against flying pests.

In order to achieve the above object, the present invention adopts the following configuration.
(1) as flying pest repellent component, flying pest repellent containing dihydro Rina role.
(2) Furthermore, citronellal, citronellol, citral, geraniol, terpineol, menthol, menthane, p-menthane-3,8-diol, camphene, methyl salicylate, citronella oil, cinnamon oil, eucalyptus oil, lemon eucalyptus The flying insect repellent according to (1), comprising one or more selected from oil and hiba oil.
(3) A flying pest repellent component of 0.5 to 5.0% by weight, a surfactant of 3.0 to 12% by weight, a lower alcohol of 2.0 to 10% by weight and water (1) Or the flying insect repellent described in (2).

The flying pest repellent of the present invention contains a terpene alcohol compound useful as a flying pest repellent component, and exhibits a repelling effect superior to citronellal against flying pests, so its practicality is extremely high.

Dihydro Lina roll used in the present invention is known as perfuming ingredients, are not known at all repellent effect against flying insect pests. As described in JP-A-11-171703, linalool itself shows some repellent effect against flying insects, but is not satisfactory in practice. However, the present inventors have focused on the modification alcohol, as a result of repeated tests, in which dihydro Lina role is newly found that exhibits a significant repellent effect against flying insect pests.
Although these compounds do not show rapid knockdown effects such as room temperature volatile pyrethroid insecticides against flying insects such as mosquitoes, they are relatively safe for human animals and can also provide a sense of fragrance. There is a merit.

The terpene alcohol compound further contains other natural essential oils and natural or synthetic fragrances such as citronellal, citronellol, citral, geraniol, terpineol, menthol, menthane, p-menthane-3,8-diol, camphene, Methyl salicylate, pinene, limonene, borneol, geranyl formate, citronella oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, hiba oil, lavender oil, orange oil, grapefruit oil, cedarwood oil, geranium oil, thyme white oil, peppermint oil You may mix | blend 1 type (s) or 2 or more types chosen from etc. Among these, citronellal, citronellol, citral, geraniol, terpineol, menthol, menthane, p-menthane-3,8-diol, camphene, methyl salicylate, citronella oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, hiba oil It is preferable in terms of repellent effect.

The flying pest repellent of the present invention may be composed only of flying pest repellent components including one or two selected from dihydrolinalol, tetrahydrolinalool, and dehydrolinalool, but usually with various components added. It is prepared in various forms. The ratio of the flying insect pest repellent component to the total amount of the repellent varies depending on the form of the repellent, but it is preferably set to about 0.5 to 5.0% by weight in the case of a liquid, for example. If the amount is less than 0.5% by weight, the repellent effect is not sufficient. On the other hand, if it exceeds 5.0% by weight, the odor becomes too strong, which is not practical. In addition, in the gel-like body, the blending amount of the flying insect repellent component is suitably about 0.5 to 10% by weight.

As long as the flying insect repellent of the present invention does not hinder the repellent effect and safety for human livestock, plant-derived deodorant components such as green tea extract and persimmon extract, and adjustment of the fragrance tone You may mix | blend another aromatic component. For example, green leaf alcohol or green leaf aldehyde called “green fragrance” can be added to give a relaxing effect.
Also, room temperature volatile pyrethroid insecticides such as empentrin, 2,3,5,6-tetrafluorobenzyl-2,2-dimethyl-3- (2,2-dichlorovinyl) cyclopropanecarboxylate [Transflux Thrin], 4-methyl-2,3,5,6-tetrafluorobenzyl-2,2-dimethyl-3- (1-propenyl) cyclopropanecarboxylate, 4-methoxymethyl-2,3,5,6- Addition of tetrafluorobenzyl-2,2-dimethyl-3- (1-propenyl) cyclopropanecarboxylate or the like can enhance the repellent effect.

The flying insect repellent of the present invention can adopt various forms such as liquid, gel, solid, and sheet according to the needs of the usage scene.
In preparing the liquid agent, in addition to water, lower alcohols such as ethanol and isopropanol, glycols such as propylene glycol, glycol ether water-soluble organic solvents such as diethylene glycol monobutyl ether and dipropylene glycol monomethyl ether, aliphatic or Aromatic hydrocarbon solvents, surfactants, solubilizers, and dispersants are appropriately used.
Examples of the gelling agent used for preparing the gel-like body include carrageenan, xanthan gum, gellan gum, gelatin, aluminum octylate, and 12-hydroxystearic acid.
On the other hand, cellulose carriers such as pulp, linter and rayon, inorganic porous carriers such as silicates, silica and zeolite, and sublimable carriers such as trioxane and adamantane are impregnated with flying insect repellent components together with a solvent if necessary. Thus, flying insect repellents such as solid, sheet and granular can be prepared.
Of course, stabilizers, pH adjusters, colorants, and the like may be added as appropriate.

Next, the liquid form flying insect repellent will be described in detail.
The formulation is 0.5 to 5.0% by weight of a flying insect repellent component, 3.0 to 12% by weight of a surfactant, 2.0 to 10% by weight of a lower alcohol, and water. Preferably, this repellent is suitably applied to a method in which the flying pest repellent component is released into the space through the liquid absorption core to the evaporation portion of the liquid absorption material, a spray method, or an aerosol method with a propellant. The

As the surfactant, it is preferable that a higher alkylamine oxide surfactant and a nonionic surfactant are used in combination from the viewpoints of stability and release properties of the flying insect repellent component.
Examples of higher alkylamine oxide surfactants include laurylamine oxide, stearylamine oxide, lauric acid amidopropyldimethylamine oxide, and the like, while nonionic surfactants include polyoxyethylene hydrogenated castor oil, Examples include polyoxyethylene higher alkyl ether (polyoxyethylene lauryl ether, polyoxyethylene oleyl ether), polyoxyethylene higher fatty acid ester, polyoxyethylene polyoxypropylene alkyl ether, and the like.
If the surfactant is less than 3.0% by weight, the flying pest repellent component is poorly solubilized, and if it exceeds 12% by weight, the release property of the flying pest repellent component may be affected.

As the lower alcohol, ethanol or isopropanol is representative, and ethanol is preferable in terms of performance. When the blending amount of the lower alcohol is less than 2.0% by weight, the compatibility with the higher alkylamine oxide surfactant is inferior. On the other hand, when it exceeds 10% by weight, the danger to fire is increased. There are cases where it does not fall under dangerous goods.

The flying insect repellent obtained in this way is applied to a system in which, for example, a container body having a liquid absorbent core is filled and the flying insect repellent component is diffused into the space through the liquid absorbent core.
Here, the material and structure of the container body are not particularly limited, and examples thereof include plastic, glass, and ceramics. A transparent or translucent plastic or glass container in which the amount of liquid inside can be visually confirmed is preferable, and the surface may be processed into a diacut or bohemian cut. Usually, a container body with a capacity of about 50 to 300 mL is practical. And the bottom part of a container main body should comprise the contact part of the liquid absorption core mentioned later somewhat concavely so that a liquid agent may be sucked up without remaining.
An inner plug for holding the liquid absorbent core is attached to the opening at the top of the container body. The inner plug is preferably made of plastic, and if it is formed in a cylindrical shape downward from the crowning position of the opening and the liquid absorbent core is inserted, it is more preferable because the liquid absorbent core can be securely held.

The liquid absorbent core is stable against repellents and absorbs an aqueous solution by capillary action. Specific examples of materials include plastic fibers such as nylon and polyester, natural fibers, and wood. Of these, a felt absorbent core made of plastic fiber or natural fiber is easy to use, and is formed into a rod shape or a twisted core shape having an outer diameter of about 3 to 10 mm and is used.

Usually, an evaporating part for dissipating the sucked repellent is provided at the upper part of the liquid absorbent core. The structure of the evaporating part is felt or sheet-like, and the material thereof can be, for example, plastic fibers such as nylon and polyester, natural fibers, wood, etc., as in the case of the liquid absorbent core. Of these, a plastic fiber or natural fiber felt or sheet-like material is preferable, and it is formed into a substantially circular shape having a thickness of 2 to 15 mm and a surface area of 10 to 60 cm ² , and this is in contact with the top surface of the liquid absorbent core If arranged, the sucked repellent moves from the liquid absorption core to the evaporation section and gradually diffuses into the air from here. If the surface area of the evaporating part is less than 10 cm ² , the amount of evaporation tends to be low, while if it exceeds 60 cm ² , the amount of evaporation is excessive, which may cause a problem in sustainability. Usually, the daily evaporation amount of the repellent is set to 1 to 8 mL, and the effective duration is adjusted to 1 to 2 months.
Moreover, it is common to provide the evaporation part support body, or to provide a mesh-like lid member that covers the evaporation part so that a finger or the like does not touch the evaporation part.
Furthermore, in order to provide interior characteristics, cloth or plastic artificial flowers may be loaded through the evaporation unit support. Artificial flowers are made by imitating various kinds of flowers such as hydrangea, lily of the valley, roses, pesticides, and ivy, and the apparent volume is preferably about 200 to 1500 cm ³ .

Even if the flying insect repellent is a gel, solid, sheet, etc., it can be prepared according to conventional methods and applied to formulations (fan-type insect repellent devices, insect curtains, etc.) suitable for the purpose and use Thus, the flying insect repellent component can be efficiently diffused into the space.
Thus, the flying insect repellent of the present invention can be used in living rooms, Japanese rooms, entrances, warehouses, restaurants, camps, etc., such as mosquitoes such as mosquitoes, chikaeka, and mosquitoes, moths, chironomids, flies, butterflies. It has a practical repellent effect against flying pests such as moths and moths. According to the flying pest repellent of the present invention, it is possible to enjoy a fragrance at the same time as a practical repellent effect over a long period of 1 to 2 months. If it is installed in the interior, it is very practical because it provides interior and enjoys the enjoyment of flowers.

Next, the flying pest repellent of the present invention will be described in more detail based on specific examples.

FIG. 1 shows a sectional view of a usage pattern to which the flying insect repellent (liquid form) of the present invention is applied.
Tetrahydrolinalol 1.1 wt%, citronellal 0.9 wt%, laurylamine oxide 1.2 wt%, polyoxyethylene hydrogenated castor oil 1.6 wt%, polyoxyethylene oleyl ether 3.0 wt%, ethanol 7. A flying pest repellent (1) of the present invention containing 0% by weight, 1.0% by weight of a green tea extract component as a deodorant, 0.02% by weight of citric acid, and 84.18% by weight of purified water was prepared. . This water repellent was classified as a non-hazardous material under the Fire Service Act.
130 g of the flying insect pest repellent (1) of the present invention was filled in a transparent polyester container main body 2, and an inner plug 4 having an outer diameter of 7 mm and a rod-shaped felt absorbent core 3 inserted in the upper opening was crowned. . A disc-like felt evaporation part 6 having a thickness of 5 mm and a diameter of 5.2 cm, which is installed on the evaporation part support 5, was attached to the top surface of the liquid absorbent core 3. Further, a plastic artificial flower 7 having an apparent volume of 350 cm ³ and imitating an ivy was loaded through the evaporation unit support 5 above, to prepare a stationary insect repellent device.
When this insect repellent device was placed on the side board of the entrance, it was possible to enjoy the fragrance for about 2 months and not be bothered by mosquitoes. In addition, Ivy's green matched the entrance and was excellent in interior.

To 1.5 g of dihydrolinalool, 0.8 g of eucalyptus oil and 0.1 g of 4-methyl-2,3,5,6-tetrafluorobenzyl-2,2-dimethyl-3- (1-propenyl) cyclopropanecarboxylate, A gelling agent (aluminum octylate) (2.0 g), diethylene glycol butyl ether (1.0 g) and isoparaffin hydrocarbon (114.6 g) were added to prepare a gel-like flying insect repellent (120 g).
This was filled into a polyester container body, and a lid member having a 40% perforated area was attached to the upper opening of the container body to produce a gel-type insect repellent device.
As in Example 1, this insect repellent device showed an excellent repellent effect against flying insects such as mosquitoes and moths.

In accordance with Example 1, various flying insect repellents shown in Table 1 were prepared and applied to an insect repellent device containing a liquid absorbent core, and the following repellent efficacy test was performed.
[Repellent efficacy test]
In the center of a sealed 6 tatami room, a mouse (blood-sucking source) fixed with a wire mesh and a test insect repellent device are installed, 50 adult female squids are released, and after 2 hours, the test insects are collected and the blood-sucking insect The number was counted to determine the blood absorption rate (treatment section). At the same time, a similar test was performed in a room of the same size without installing an insect repellent device (control zone), and the repelling rate (blood absorption inhibition rate) was calculated from the blood absorption rate according to the following formula.
Repelling rate (%) = [blood absorption rate of control group−blood absorption rate of treatment group] / blood absorption rate of control group × 100

As a result of the test, the flying pest repellent of the present invention showed a repellent effect over citronellal against flying pests based on the action of dihydrolinalol, tetrahydrolinalool, and dehydrolinalol blended as repellent components, both of which against fire It was low in danger and excellent in terms of usability.
On the other hand, as shown in Comparative Examples 1 to 4, it was recognized that the repellent effect of citronellal, p-menthane-3,8-diol, terpineol and linalool was inferior to that of the terpene alcohol compound. Moreover, even if it is a derivative | guide_body of a linalool, the linalyl formate of the esters (comparative example 5) had a low repellent effect.

FIG. 2 shows a cross-sectional view of one usage pattern to which the flying insect repellent (liquid form) of the present invention is applied.

Explanation of symbols

1. 1. Flying insect repellent 2. Container body Absorbent core 4. Inner plug 5. Evaporator support 6. Evaporator 7 Artificial flower

Claims (3)

As flying pest repellent component, flying pest repellent agent characterized by containing the dihydro Rina role. Furthermore, as flying insect repellent components, citronellal, citronellol, citral, geraniol, terpineol, menthol, menthane, p-menthane-3,8-diol, camphene, methyl salicylate, citronella oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, hiba The flying pest repellent according to claim 1, wherein one or more selected from oils are blended. The flying pest repellent component is 0.5 to 5.0% by weight, the surfactant is 3.0 to 12% by weight, the lower alcohol is 2.0 to 10% by weight and water. Item 3. A flying insect repellent according to item 1 or 2.