JPS6138161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric mosquito repellent that more clearly displays changes in the efficacy of insecticidal ingredients.

Generally, electric mosquito repellent mats are made by impregnating insecticidal ingredients (allethrin, flamethrin, etc.) into a base material such as a pulp board, and then using an electric mosquito repellent to heat the mixture to 150 to 170℃.
It is heated to evaporate the insecticidal ingredients. The base material also contains a volatilization regulator (piperonyl butoxide, etc.) to volatilize the insecticidal ingredient over a period of 7 to 12 hours, and an antioxidant to prevent the insecticidal ingredient from deteriorating in the product. agent (BHT,
BHA, etc.), as well as fragrances to mask the odor of insecticidal ingredients and volatilization regulators.

Furthermore, unlike mosquito coils, electric mosquito repellents have the disadvantage that the end point of use is not clear, so they are formulated with pigments, and their effectiveness (whether they have insecticidal power or not) is determined by the degree of discoloration. 1,4-dibutylaminoanthraquinone (Japanese Patent Publication No. 46-24277), 1-methylamino-4-orthotolylaminoanthraquinone (Japanese Patent Publication No. 46-24277), and 1-methylamino-4-orthotolylaminoanthraquinone (Special Publication No. 1977-
23939), arylaminoanthraquinone (JP-A-1989-1999)
-133426) have been proposed.

However, in the conventional efficacy change display, the pigment simply fades gradually (usually from blue to pale blue), so it is difficult for the user to understand how much fading is effective. When using Matsuto for 2 to 3 hours at a time over several days, it is difficult to judge the remaining potency, such as how many hours it can be used, because the potency indication is simply a change in the saturation of the same color. There were flaws.

As a result of various studies to solve the above-mentioned drawbacks, the present inventor has found that by combining a thermochromic pigment with a non-thermochromic pigment that has a different hue from the thermochromic pigment, the effectiveness of the insecticidal ingredient can be reduced by simply changing the saturation. Instead, the above drawbacks are solved by displaying the change in hue and changing the hue of the electric mosquito repellent as the insecticidal component volatilizes due to heating.

The present invention will be explained in detail below.

The electric mosquito repellent mat of the present invention is a mat in which a base material such as pulp is impregnated with an insecticidal component that volatilizes by heating, and preferably with components such as a volatilization regulator, an antioxidant, and a fragrance. The agent is dyed with a thermochromic dye having a different hue from the base, and a non-thermochromic dye having a different hue from the base and the thermochromic dye, and the base is dyed with the color of the thermochromic dye. is formed into a mixed color of this and the color of the non-thermochromic dye, and heated to change the color of the pine from the color of the thermochromic dye or the mixed color of this and the color of the non-thermochromic dye to the non-thermochromic dye. The hue changes sequentially to the following colors.

In this case, the thermochromic pigment is impregnated into the substrate together with the insecticidal component, and when heated at about 150 to 170°C, it evaporates, decomposes, and decomposes as the insecticidal component evaporates.
Any material can be used as long as it discolors due to migration into the interior, such as 1,4-dibutylaminoanthraquinone, 1-methylamino-4
-Orthotolylaminoanthraquinone, allylaminoanthraquinone, etc. can be used.

Further, as the non-thermochromic dye, any dye can be used as long as it is not unstable to heat, such as water-soluble dyes such as natural water-soluble dyes and tar-based water-soluble dyes.

When these water-soluble dyes are used, it is sufficient to dye the base material such as a pulp board in advance, and there is no color unevenness and it is convenient from the point of view of workability.

The non-thermochromic dye used has a hue different from that of the thermochromic dye used. Mat can be made into a desired color by combining and concentrating these two pigments, but if a warm color pigment is used as a non-thermochromic pigment and a cool color pigment is used as a thermochromic pigment, the color change will be less likely. I like it because it's large and easy to understand. For example, by combining a yellow or orange water-soluble pigment and a blue thermochromic pigment to make blue to green pine, and heating this, the pine changes color from yellow to orange as the insecticidal component evaporates due to heating. can be displayed clearly.

In the present invention, as the insecticidal component, volatilization control agent, antioxidant, fragrance, etc., components commonly used in electric mosquito repellent mats are used. For example, pyrethroid insecticides such as allethrin and flamethrin that volatilize by heating can be used as insecticidal ingredients, piperonyl butoxide (PBO) and the like can be used as volatilization regulators, and dibutylhydroxytoluene ( BHT) and butylhydroxyanisole (BHA) are used.

The electric mosquito repellent mat of the present invention can be produced, for example, by impregnating a base material such as pulp that has been dyed in advance with a non-thermochromic dye with an insecticide stock solution containing a thermochromic dye and an insecticidal component.

The electric mosquito repellent mat according to the present invention is heated and used in the same way as conventional mats, and the insecticidal components in the mat are volatilized by heating, and the insecticide is killed and exterminated by this action. In this case, the pine of the present invention uses a combination of a non-thermochromic pigment and a thermochromic pigment that have different hues for the purpose of displaying efficacy, so that the insecticidal component is volatilized by heating and the mat is thermochromic. The pigment fades and the hue of the non-thermochromic pigment becomes clearly visible, so the degree of residual efficacy of the insecticidal ingredient and the presence or absence of efficacy are displayed not as a mere change in saturation, but as a change in hue. That is, in the electric mosquito repellent mat of the present invention, a base material is dyed with a thermochromic dye having a different hue from the base material, and a non-thermochromic dye having a different hue from the base material and the thermochromic dye, respectively. , the base is formed into the color of the thermochromic dye or a mixture color of this and the color of the non-thermochromic dye, and the matte is heated to have the color of the thermochromic dye or the color of this and the non-thermochromic dye. The hue changes sequentially from the mixed color with the color of the dye to the color of the non-thermochromic dye, and as heating progresses in this way,
As the insecticidal ingredient evaporates, the color of the pine changes to a hue different from the initial hue, which clearly indicates the remaining amount of the insecticidal ingredient and the end point of its use, which is very useful for the user. It is easy to understand.

EXAMPLES Next, the present invention will be explained in more detail with reference to Examples.

[Example 1] Stock solution composition 1 Pinamin Fuorte (manufactured by Sumitomo Chemical Co., Ltd.) 10.0g PBO 2.5g BHT 2.5g Tar-based dye Blue No. 403 0.4g Stock solution composition 2 Pinamin Fuorte (manufactured by Sumitomo Chemical Co., Ltd.) 10.0g PBO 2.5g BHT 2.5g 1 , 4-dibutylaminoanthraquinone 0.4g Pre-paint the pulp board yellow and orange with tar-based water-soluble dye Yellow No. 403, tar-based water-soluble dye Orange No. 402, or carotenoid-based water-soluble natural dye extracted from gardenia fruits, respectively. , were dyed yellow-orange, and about 61.6 mg of the above-mentioned stock solution composition 1 or 2 was applied per pine to impregnate them, resulting in a blue color.
Blue-green (A) for the combination of No. 403 or 1,4-dibutylaminoanthraquinone and yellow No. 403, green for the combination of blue No. 403 or 1,4-dibutylaminoanthraquinone and orange No. 402 Blue (B),
In the case of Blue No. 403 or the combination of 1,4-dibutylaminoanthraquinone and carotenoid dye, blue (C) matte was obtained.

Next, these mats were heated for 8 hours using a commercially available electric burner, and the discoloration was observed.
The following color change results were obtained.

For A and B pine: Blue-green or green-blue → Green → Yellow-green → Yellow For C pine: Blue → Red-purple → Blue with orange → Orange with blue → Orange As is clear from the above results. In the electric mosquito repellent mat according to the present invention, the hue of the mat changes as the insecticidal component is volatilized by heating, and the remaining level of the insecticidal component and the end point of use are clearly displayed.

[Example 2] Tar-based water-soluble dyes Yellow No. 202-(1) Yellow No. 203 Yellow No. 4 Yellow No. 5 Orange No. 205 Red No. 201 The pulp boards were dyed in advance, respectively. Approximately 60.5 mg of a stock solution having almost the same composition as stock solution composition 1 used in Example 1 was applied to these and impregnated.

When these were heated in the same manner as in Example 1 and the discoloration of each pine was observed, yellow No. 202-(1), No. 203,
In the case of No. 4 and No. 5, the same results as Mat A in Example 1, in the case of Orange No. 205, Mat B, and in the case of Red No. 201, Mat C of Example 1 were obtained.

[Example 3] A pulp board was dyed in advance with a tar-based water-soluble dye Yellow No. 202-(1), and Celsu Blue GN (Beyer A green electric mosquito repellent pine was obtained by applying and impregnating the stock solution with the same formulation except for the one used (manufactured by Phys. Co., Ltd.).

When this mat was heated in the same manner as in Example 1, it was observed that the mat changed color from green to yellowish green to yellow.

Claims (1)

[Scope of Claims] 1. An electric mosquito repellent mat comprising a base impregnated with an insecticidal component that volatilizes when heated, the base comprising a thermochromic pigment having a different hue from the base, and the base and a thermochromic pigment. The dye and the non-thermochromic dye each having a different hue are used to dye the base, and the base is formed into the color of the thermochromic dye or a mixed color of this and the color of the non-thermochromic dye, and matte is dyed by heating. An electric mosquito repellent mat characterized in that the hue changes sequentially from the color of a thermochromic pigment or a mixed color of this and a color of a non-thermochromic pigment to the color of a non-thermochromic pigment. 2. The electric mosquito repellent mat according to claim 1, wherein the non-thermochromic dye is a water-soluble dye.