JPH0625971A - Method for imparting textile product with house dust mite killing property resistant to light and cleaning - Google Patents

Abstract

(57) [Summary] [Purpose] While adopting a simple post-processing method, it is excellent in indoor dust mites and lethality, for textile products for the body or living environment involving laundry and drying operations by sunlight. It is an object of the present invention to provide a method for imparting light resistance and dry cleaning resistance. [Structure] At least one active ingredient selected from dialkyl phthalates having an alkyl group having 1 to 4 carbon atoms can be washed with or without sunlight without using any other acaricide or acaricide or powder forming material. It is carried by post-processing on a fiber product for the body or living environment accompanied by a drying operation. As a result, the fiber product is subjected to an indoor dust mite lethal treatment having light resistance and cleaning resistance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of subjecting a fiber product for the body or a living environment to an indoor dust mite lethal treatment having light resistance and cleaning resistance.

[0002]

2. Description of the Related Art Indoor dust mites generated in a house have been frequently generated in accordance with the living environment in recent years, but they cause not only discomfort but also worm bite and allergic asthma. Therefore, there is a strong interest in health and hygiene regarding tick control measures.

Particularly, products such as underwear, socks, bedding, rugs, tatami mats, etc., which are used everyday, serve as a nutritional source due to the secreted substances discharged from the human body or pets, peeled skin, food waste, and the like. It is a convenient medium for breeding indoor dust mites. Therefore, it has been practiced to treat these products with a drug to have a tick-proof effect.

[0004] Conventionally, insecticides such as fenitrothion, fenthion, diazinon, propoxur, resmethrin, and phenothrin, and diethyltoluamide, which is a blood-sucking insect repellent, have been used as a control agent for indoor dust mites. Then, the effects of benzyl benzoate, phthalimide compounds, isobornyl thiocyanoacetate, dehydroacetic acid, etc. were proposed, and the corresponding effects were achieved.

On page 411 of "Outline of Agrochemicals, Published by Gihodo Co., Ltd., Date of Issue: March 15, 1945", "King,
W., Agr. Handbook, 69 (1954) '', it is said that dimethyl, diethyl or dibutyl phthalate has a repellent effect on Tsutsugamushi or Amblyomma americanum, but Amblyomma americanum is a kind of mites that live outdoors, No effect on indoor dust mites has been tried.

Japanese Unexamined Patent Publication (Kokai) No. 2-47360 discloses that a phthalate ester is used as a carrier for an anti-mitic agent and applied to fibers for wadding. The reason why phthalate ester is used as a carrier is that the anti-mitic agent is difficult to dissolve in a general organic solvent, and even if it is dissolved, the anti-miticating agent easily falls off from the fiber surface because the boiling point of the organic solvent is low. Is.

In Japanese Patent Laid-Open No. 64-40025, there is disclosed a dust bag for an electric vacuum cleaner in which a compound having an anti-mite property and a liquid substance at room temperature are carried in the dust bag to enhance the mite-proof property. As shown, phthalate ester is also mentioned as an example of a substance that is liquid at room temperature. In addition, other insecticides, fungicides and antibacterial agents may be added together with the compound having anti-mite properties,
In addition, repellents, synergists, stabilizers, fragrances, deodorants, rust preventives,
A retention agent may be added, and phthalate ester is mentioned as an example of the repellent.

Japanese Utility Model Laid-Open No. 57-120385 discloses a pest repellent carpet using a carpet pile system containing and holding a pest repellent substance. The pest repellent used here is a conventional pest repellent. Known agents are used as repellents, and among many pest repellent substances listed as specific examples, phthalate esters such as dimethyl phthalate and dibutyl phthalate are also mentioned.

Japanese Unexamined Patent Publication (Kokai) No. 61-57501 discloses an agent for destroying house dust mites, which comprises an acaricide active compound, a cleanser and water, and phthalic acid is an example of the acaricide active compound. Esters are also listed.

[0010]

The insecticide for epidemic prevention is originally used for controlling flies and cockroaches, and has a peculiar unpleasant odor and irritation, and is safe in use. There is also a limitation of, and it cannot be used freely in the body or living environment.

The blood-sucking insect repellents such as diethyl toluamide, benzyl benzoate, phthalimide compounds, isobornyl thiocyanoacetate, and dehydroacetic acid are used in order to eliminate the above-mentioned drawbacks of the insecticidal insecticides. Although these have been proposed, they are still not always satisfactory in terms of odor, efficacy, etc.

Japanese Unexamined Patent Publication (Kokai) No. 2-47360 discloses that a phthalate ester is used as a carrier for an anti-mitic agent and is added to a fiber for wadding, but the phthalate ester is merely a carrier for the anti-mitic agent. It is only used as.

In JP-A-64-40025, a phthalate ester is also mentioned as an example of a substance which is liquid at room temperature, but a substance which is liquid at room temperature is used only as a carrier for a compound having an anti-mite property. I'm just there. The publication also describes a repellent along with a compound having anti-mite properties and a substance that is liquid at room temperature (also mentions phthalates).
Although it may be used, the repellent is literally used as an auxiliary only for the purpose of repelling.

The pest repellent carpet disclosed in Japanese Utility Model Laid-Open No. 57-120385 relates to repelling pests literally. Among the pest repellent substances enumerated as specific examples, phthalate esters such as dimethyl phthalate and dibutyl phthalate are mentioned, but only N, N-dimethyltoluamide is mentioned in the examples. Therefore, no supporting data for other drugs is described.
Taxonomically, mites belong to a different class from insects, and their drug sensitivity is often not consistent with that of insects. It is also known that there are many types of mites, and that the susceptibility to drugs is significantly different depending on the type of mites. However, the above publication does not refer to each type of indoor dust mites for dimethyl phthalate and dibutyl phthalate, and does not describe the lethal effect on mites. In addition, this invention only considers containing and holding the pest repellent substance in the "pile", and is limited to the carpet which is practically not washed.

Japanese Patent Laid-Open No. 61-57501 discloses an agent for destroying house dust mites consisting of an acaricide active compound (phthalic acid ester is also exemplified), a cleanser and water. In order to exert the acaricidal effect, it is necessary to form a powder residue suitable for oral ingestion after drying or application, and therefore solid powder or the like must be blended. However, with this formulation, there are doubts regarding safety for human body and cleaning resistance.

In general, clothes, bedding and the like are frequently washed by water and organic solvents and dried by sunlight, so that their effectiveness is not deteriorated by these operations, and they are safe and easy to install indoors. Dust mites lethal processing is desired. However, it was not easy to provide a sufficient effect of lethal effect against indoor dust mites with a simple “post-processing method” that is widely used. In particular, the light resistance and the dry cleaning resistance were insufficient.

Against this background, the present invention provides an excellent indoor dust for a fiber product for the body or living environment accompanied by a washing operation and a drying operation by sunlight while adopting a simple post-processing method. It is an object of the present invention to provide a method for imparting the lethal mite lethality, light resistance and dry cleaning resistance.

[0018]

Means for Solving the Problems According to the present invention, "at least one active ingredient selected from dialkyl phthalates having an alkyl group having 1 to 4 carbon atoms is added to another acaricide or acaricide or powder forming agent. The fiber product has light resistance and cleaning resistance, which is characterized by being carried by post-processing on a fiber product for body or living environment involving washing and drying operations without using the material. The method of performing lethal processing of indoor dust mites. "

The present invention will be described in detail below.

In the present invention, the active ingredient supported on the fiber product is a dialkyl phthalate having an alkyl group having 1 to 4 carbon atoms. Here, as the dialkyl phthalate, dialkyl orthophthalate, dialkyl isophthalate and dialkyl terephthalate are used. As the alkyl group having 1 to 4 carbon atoms, a methyl group, an ethyl group,
Examples include propyl group and butyl group. The propyl group and the butyl group may be linear alkyl groups or branched alkyl groups. Further, the two alkyl groups may be the same or different. When the number of carbon atoms of the alkyl group is more than the above range, the effect of lethal indoor dust mites will decrease.

The above-mentioned active ingredient is externally carried on the fiber product for the body or the living environment accompanied by washing and drying operations by sunlight. Here, the textile products for the body or the living environment include clothes, kimono, underwear, sweaters, shirts,
Sleepwear, socks, gloves, collars, scarves and other clothing items; furoshiki, clothes, hats and other personal items; futon cotton, futon side cloth, futon covers, futon bags, quilts, sitting cloths, pillows, pillowcases, blankets. Beddings such as; tatami mats, tatami mats, grass products, straw products; packaging bags; pickles; curtains; sports equipment;

In carrying the above-mentioned active ingredient on the fibrous product, the active ingredient is dissolved or dispersed in an appropriate medium, and a predetermined amount is applied to the fibrous product by means such as spraying, coating or dipping, and then dried. Good. For example, the active ingredient as it is, or after once dissolved in a solvent such as a hydrocarbon, to prepare a liquid emulsified with water using a surfactant, a method of applying this to a fibrous product, the active ingredient alcohol, A method of applying it to a fibrous product after dissolving it in a solvent such as a hydrocarbon, a ketone, an ester, an ether, or a halogen-containing solvent is adopted. In some cases, the active ingredient may be directly applied to the fibrous product.

In the external loading by the above-mentioned post-processing, it should not be used in combination with any other acaricide or acaricide or powder forming material. This is because such combined use causes a problem in terms of safety for the human body and is also disadvantageous in terms of light resistance and dry cleaning resistance.

The loading amount of the above active ingredient on the fibrous product is
Porous product type, tick type, habitat, breeding density,
Although it is determined in consideration of the limit capacity of the active ingredient for application, etc., the amount of the active ingredient supported on the fibrous product is typically 0.01 to 10% by weight, preferably 0.05 to 5% by weight. When the carried amount is too small, the desired indoor dust mite lethal effect may not be sufficiently exerted, and even if it is carried in an unnecessarily large amount, the indoor dust mite lethal effect does not rise above a certain level. Rather, it may reduce the quality and feel of fiber products, which is economically disadvantageous.

Depending on the fibrous product, it is possible to concentrate a large amount of the active ingredient in an effective part such as near the surface of the product having a thickness.

[0026]

By externally supporting the above-mentioned active ingredient on a fiber product for the body or the living environment by post-processing, an extremely excellent lethal action against indoor dust mites is exhibited. Indoor dust mites include dust mites, mites,
It has a wide variety of genus mite, dust mite, phytoseiid mite, and sardine mites, and its lethal effect is not immediate, but it shows a lethal effect in a proper and reliable manner.

Moreover, the fibrous product carrying the active ingredient has excellent light resistance and dry cleaning resistance, and its lethal effect against indoor dust mites is maintained for a long time even after repeated washing and drying operations by sunlight. .

The active ingredient, dialkyl phthalate, is a stable high-boiling compound, has almost no color, odor, or skin irritation, and has the following reports regarding acute toxicity. Recognized as something. Compound Oral LD ₅₀ Dimethyl orthophthalate 8.2 g / kg (rat) Diethyl orthophthalate 8.6 g / kg (rat) Di-n-butyl orthophthalate 21.0 g / kg (rat)

[0029]

EXAMPLES The present invention will be further described with reference to examples.

Example 1, Comparative Example 1 Dimethyl phthalate (ortho and iso), diethyl phthalate (ortho and terre), diisopropyl ortho phthalate and di n-butyl ortho phthalate were separately dissolved in acetone to give 1 w / v each. A% concentration solution was prepared.

A predetermined amount of the above-prepared solution was uniformly applied to a cloth made of acrylic fiber cut into a circle having a diameter of 6 cm and then air-dried to prepare a sample A ₀ .

For comparison, a sample A ₀ was prepared in the same manner for isobornyl thiocyanoacetate, diazinon and di2-ethylhexyl orthophthalate.

To determine the light resistance, a specimen A ₁ was prepared by irradiating the specimen A ₀ with a fade odometer for 40 hours.

In order to judge the dry cleaning resistance,
A sample A ₂ was prepared by subjecting the sample A ₀ to dry cleaning three times according to JIS L 0821.

A test for lethal effect on Dermatophagoides farinae and Dermatophagoides farinae was conducted on the samples A ₀ and A ₁ and the samples A ₀ and A ₂ as follows.

Lethal effect test A sample is laid on the bottom of a glass petri dish having an inner diameter of 6 cm, and then sample mites are uniformly planted together with the medium so that the number of each sample is 300 to 500, and the condition is maintained at 25 ° C. and 75% RH. Place, take out 48 hours later, and direct 20
The number of total mites in a part within one visual field was counted under a stereoscopic microscope with a magnification of 2 and the life and death were determined at the same time. Repeat the operation to change the field of view and count the total number of ticks to determine whether the animal is alive
The average lethality rate was calculated.

Results The results relating to light resistance are shown in Table 1. Table 2 shows the results regarding the dry cleaning resistance.

[0038]

[Table 1] (Light resistance) Kona leopardaceae Kentaga mites Active ingredient Fiber product D Lethal rate (%) Lethal rate (%) A ₀ A ₁ A ₀ A ₁ Example 1 Dimethyl orthophthalate Acrylic cloth 100 100 100 100 Dimethyl isophthalate acrylic fabric 100 100 100 100 diethyl ortho phthalate acrylic fabric 100 100 100 100 diethyl terephthalate acrylic fabric 100 100 100 100 diisopropyl ortho phthalate acrylic fabric 100 100 100 100 rate di n- butyl ortho phthalate-les acrylic fabric 100 100 100 100 over preparative Comparative example 1 Isobornylthiocyanoacryl Acrylic Fabric 100 35 100 14 Cetate Diazinon Acrylic Fabric 100 52 94 38 Di-2-ethylhexylol Acrylic Fabric 80 80 40 35 Tophthalate (active ingredient loading 1.0% by weight)

[0039]

[Table 2] (Dry-cleaning resistance) Kona Hida Hinode Kenta Mite Active ingredient Fibrous product D Mortality (%) Mortality (%) A ₀ A ₂ A ₀ A ₂ Example 1 Dimethyl orthophthalate Acrylic cloth 100 100 100 100 Dimethyliso phthalate acrylic fabric 100 100 100 100 diethyl ortho phthalate acrylic fabric 100 100 100 100 diethyl terephthalate acrylic fabric 100 100 100 100 diisopropyl ortho phthalate acrylic fabric 100 100 100 100 rate di n- butyl ortho phthalate-les acrylic fabric 100 100 100 100 over preparative comparison Example 1 Isobornylthiocyanoacryl Acrylic Fabric 100 60 100 55 Cetate Diazinon Acrylic Fabric 100 33 94 28 Di-2-ethylhexylol Acrylic Fabric 80 80 45 40 Tophthalate (active ingredient loading 1.0% by weight)

Example 2, Comparative Example 2 A composition prepared by diluting 80% by weight of diethyl orthophthalate, 10 parts by weight of octyldodecyl myristate (anti-irritant) and 10 parts by weight of an emulsifier in water, wool,
Each blanket made of cotton and acrylic fiber was dipped, squeezed so that the amount of diethyl phthalate was 1% by weight based on the weight of the fiber, and then dried to obtain a sample B ₀ .

For comparison, a sample B ₀ was prepared in the same manner for isobornyl thiocyanoacetate and diazinon. However, the target was a blanket made of wool.

To determine the light resistance, a specimen B ₁ was prepared by irradiating the specimen B ₀ with a fade odometer for 40 hours. Further, in order to determine the dry cleaning resistance, a sample B ₂ was prepared by subjecting the sample B ₀ to dry cleaning three times according to JIS L 0821.

Tests B ₀ and B ₁ and samples B ₀ and B ₂ were subjected to the lethal effect test against Dermatophagoides farinae and Dermatophagoides farinae as described above.

The results relating to light resistance are shown in Table 3. Also,
The results relating to the dry cleaning resistance are shown in Table 4.

[0045]

[Table 3] (Light resistance) Dermatophagoides farinae Active ingredient Fiber product D Mortality rate (%) Mortality rate (%) (Blanket) B ₀ B ₁ B ₀ B ₁ Example 2 Diethyl orthophthalate Wool 100 100 100 100 Diethyl Orthophthalate Cotton 100 100 100 100 Diethyl orthophthalate Acrylic fiber 100 100 100 100 Comparative Example 2 Isobornylthiocyanoa Wool 100 60 100 46 Cetate diazinon Wool 100 80 100 32 (Amount of active ingredient is 1.0% by weight)

[0046]

[Table 4] (Dry cleaning resistance) Dermatophagoides farinae Active ingredient Fiber product D Mortality rate (%) Mortality rate (%) (Blanket) B ₀ B ₂ B ₀ B ₂ Example 2 Diethyl orthophthalate Wool 100 100 100 100 Diethyl orthophthalate Cotton 100 100 100 100 Diethyl orthophthalate Acrylic fiber 100 100 100 100 Comparative example 2 Isobornyl thiocyanoa Wool 100 40 100 36 Cetate diazinon Wool 100 35 100 30 (active ingredient loading is 1.0% by weight)

From the results shown in Tables 1 to 4, it can be seen that the method of the present invention produces an excellent effect of killing indoor dust mites even after irradiation with a fade odometer and dry cleaning.

[0048]

EFFECTS OF THE INVENTION By loading the above-mentioned active ingredient on a fiber product for the body or living environment accompanied by washing and drying operations by sunlight, an extremely excellent lethal effect against various indoor dust mites is achieved. To be done. Moreover, since it has excellent light resistance and dry cleaning resistance, the effect of lethal indoor dust mites is long-lasting.

Since it is possible to support the active ingredient by post-processing, it is possible to avoid exposure to harsh conditions in the manufacturing process of the fibrous product.
This is advantageous because it reduces wear and wear, and it means that it is possible to re-carry when the effect is reduced due to actual use.

The above-mentioned active ingredient is mild in physical properties, has almost no color, odor and skin irritation and is highly safe. Therefore, even a fibrous product used in a place where it is likely to come into contact with the human body can be applied safely and comfortably, and is extremely suitable for health and hygiene. Low cost is one of the advantages.

As described above, the method of the present invention greatly contributes to maintaining a safe and comfortable body or living environment.

Claims (2)

[Claims] 1. An at least one active ingredient selected from dialkyl phthalates having an alkyl group having 1 to 4 carbon atoms,
Characterized by post-processing carried on a fiber product for the body or the living environment involving washing and drying operations by sunlight, without being used in combination with other acaricide or acaricide or powder forming material. A method of subjecting a fiber product to an indoor dust mite lethal treatment having light resistance and cleaning resistance. 2. The method according to claim 1, wherein the amount of the active ingredient supported on the fibrous product is 0.01 to 10% by weight.