JP7642187B2 - New aqueous dispersion for textile processing and textile products using same - Google Patents

Description

The present invention relates to an aqueous dispersion containing a pest repellent component, which comprises icaridin (A), an oil component (B), a surfactant (C), and a water-soluble polymer (D), and to fiber fabrics and fiber products processed using the same.

According to a 2016 announcement by the World Health Organization (WHO), the number of deaths worldwide from infectious diseases transmitted by arthropods such as mosquitoes reaches 1 million per year, accounting for 17% of all infectious diseases. On the other hand, it has also been reported that many of these infectious diseases can be prevented by taking preventive measures. In Japan, too, the National Institute of Infectious Diseases updated its response and countermeasures manual for mosquito-borne infectious diseases such as dengue fever, chikungunya fever, including Zika virus infection, in April 2016, and the Ministry of Health, Labor and Welfare is calling on local governments and other organizations to take measures to prevent infectious diseases.

Repellent fiber structures for protecting the human body from mosquitoes and other sanitary pests are widely used, and many improvements have been made to improve their repellent effect and safety for the human body. To achieve a high repellent effect, it is sufficient to apply a high concentration of repellent components, but when considering safety for the human body, pest repellent components with low biological safety cannot be used in large quantities. For example, DEET has been used worldwide for many years, but there have been cases where it has had an effect on the nervous system, and there are currently restrictions on its use for people under the age of 12 (Non-Patent Document 1).

Icaridin has a stronger and more sustained pest repellent effect than existing pest repellent ingredients such as DEET. It has also been confirmed to have an unprecedented high level of safety, and is reported to not cause skin irritation like DEET. According to the World Health Organization, Icaridin is reported to be an equivalent or superior alternative to DEET. The US Centers for Disease Control and Prevention lists Icaridin, DEET, lemon oil, etc. as repellent ingredients for mosquitoes (which transmit diseases such as West Nile virus and eastern equine encephalitis).

The Public Health Agency of Canada (Health Canada) has determined that icaridin is the repellent of choice for travelers with children aged 6 months to 12 years, and has concluded that products containing up to 20% by weight are safe and effective for children. The United States Environmental Protection Agency has registered icaridin repellents in the category of unlimited age range for use. However, these are aerosol compositions that are sprayed directly onto the skin or clothing (Patent Documents 1 to 3), and there is a need for a processing agent that can be easily applied to textiles (clothing, sheets, etc.) and impart a pest repellent effect. Processing methods have been published for fabrics that impart a repellent effect by combining them with ultraviolet absorbers, antibacterial agents, and deodorants (Patent Documents 4 to 6), but the pest repellent components used are hydrophobic, there is no description of a water dispersion method, and practical processing in an aqueous system is difficult, and the desired repellent effect requires the use of each combined agent, so there is a need for a processing agent and processing formula that can easily impart a repellent effect.

Patent Publication 2013-203663 International Publication No. 2012/33196 Patent Publication 2019-196321 Patent Publication No. 2019-77645 Patent Publication No. 2019-77646 Patent Publication No. 2019-77647

Ministry of Health, Labor and Welfare, Pharmaceuticals and Food Safety Bureau, Safety Measures for Drugs and Quasi-drugs Containing DEET, [online], August 24, 2005, http://www.mhlw.go.jp/topics/2005/08/tp0824-1.html

The present invention aims to provide an aqueous dispersion containing an oil-soluble pest repellent component, and to provide a fiber fabric and a fiber product that have been treated with this aqueous dispersion to impart a pest repellent effect.

The inventors have discovered that by using an aqueous dispersion containing icaridin (A), an oil component (B), a surfactant (C), and a water-soluble polymer (D), it is possible to easily impart an insect repellent effect to textile fabrics and textile products.

The oil component (B) is characterized by being at least one of silanol silicone oil, dimethyl silicone oil, squalane, olive oil, and liquid paraffin, and the ratio of icaridin (A) to oil component (B) is (A):(B) = 2:1 to 1:4.

At least 80% by mass of the surfactant (C) has an HLB value of 5 or less.

HLB stands for Hydrophile Lipophile Balance, and is a value that indicates the degree of affinity of a surfactant for water and oil (organic compounds that are insoluble in water), and is expressed as a number between 0 and 20 (the closer to 0, the more lipophilic it is, and the closer to 20, the more hydrophilic it is).

The water-soluble polymer (D) is polyvinyl alcohol and/or polyvinylpyrrolidone, and the ratio of the water-soluble polymer (D) to the total amount of the icaridin (A) and the oil component (B) is 15 to 35 mass%.

The present invention uses an aqueous dispersion containing a pest repellent component, which can be easily processed into fiber fabrics and fiber products in an aqueous system, imparting excellent pest repellent effects. In addition, the pest repellent component is highly safe, making it possible to provide fiber fabrics and fiber products that are safe even for children.

In other words, it was discovered that by adding oil component (B) to icaridin (A) to form an aqueous dispersion, it adheres more effectively to the fiber structure than an aqueous dispersion of icaridin (A) alone, improving the pest repellent effect and washing durability. In addition, the fiber processing process includes drying and heat treatment steps, and in an aqueous dispersion of icaridin (A) alone, the pest repellent component volatilizes during these steps, reducing the repellent effect, but the present invention also provides an excellent improvement over this phenomenon.

The present invention is explained in detail below.

The aqueous dispersion of the present invention is an aqueous dispersion containing the pest repellent component icaridin (A), an oil component (B), a surfactant (C), and a water-soluble polymer (D).

The icaridin (A) used in the present invention is a pest repellent component, and is a compound represented by the following chemical formula (1).

The oil component (B) used in the present invention is characterized by being at least one of silanol silicone oil, dimethyl silicone oil, squalane, olive oil, and liquid paraffin, and the ratio of icaridin (A) to oil component (B) is preferably (A):(B) = 2:1 to 1:4.

Regarding the blend ratio of icaridin (A) to oil component (B), if the ratio of (B) is less than (A):(B)=2:1, the amount of icaridin (A) adhering to the fabric decreases, and good pest repellent effect, which is the objective of the present invention, cannot be obtained. This is because icaridin evaporates during the drying process of textile processing, etc., but this can be suppressed by blending an oil component. On the other hand, if the ratio of (B) is more than (A):(B)=1:4, the resulting aqueous dispersion becomes too viscous and cannot be processed.

The surfactant (C) used in the present invention preferably has an HLB value of 5 or less in an amount of 80% by mass or more. If the amount of surfactant with an HLB value of 5 or less does not reach 80% by mass, a good aqueous dispersion cannot be obtained.

Examples of the surfactant (C) of the present invention include, but are not limited to, glycerin fatty acid esters, propylene fatty acid esters, sorbitan fatty acid esters, polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene cetyl ether, polyoxyethylene secondary alcohol ether, polyoxyethylene styrenated phenyl ether, polyoxyethylene isodecyl ether, polyoxyethylene tridecyl ether, polyoxy hydrogenated castor oil, and the like. In addition, as supplements to these, alkyl sulfate sodium salt, alkyl ether sulfate sodium salt, alkyl sulfate ester salt, alkylbenzene sulfonate, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium dodecylbenzenesulfonate, sodium di-2-ethylhexyl sulfosuccinate, sodium dialkyl sulfosuccinate, lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, 1,3-butanediol, 1,4-butanediol, trimethylolpropane, ethylene carbonate, propylene carbonate, lecithin, isoflavone, undecylenic acid, undecylenic acid monoglyceride, etc. may be used in combination, and these may be used alone or in combination of two or more.

The water-soluble polymer (D) used in the present invention is polyvinyl alcohol and/or polyvinylpyrrolidone, and the proportion of the water-soluble polymer (D) relative to the total amount of the icaridin (A) and the oil component (B) is preferably 15 to 35% by mass. If the proportion of (D) is less than 15% by mass, a good aqueous dispersion cannot be obtained. On the other hand, if the proportion of (D) is more than 35% by mass, the obtained aqueous dispersion becomes too viscous to be processed.

The amount of the pest repellent ingredient icaridin (A) attached to the fiber is not particularly limited, but is generally preferably 0.01 to 10% by mass, more preferably 0.1 to 5.0% by mass, based on the dry mass of the fiber.

A sugar alcohol, menthol, or a menthol derivative may be added as a cooling component to the pest repellent component icaridin (A). In addition, in the processing formulation, the aqueous dispersion of the present invention may be used in combination with a processing agent containing a sugar alcohol, menthol, or a menthol derivative as a cooling processing agent.

Examples of sugar alcohols include sorbitol, mannitol, mannose, xylitol, trehalose, maltitol, and oligosaccharide alcohols. These may be used alone or in combination of two or more.

Examples of menthol or menthol derivatives include 2-isopropyl-N,2,3-trimethylbutyramide, 2-[(2-isopropyl-5-methylcyclohexylcarbonyl)amino]ethyl acetate, N-ethyl-p-menthane-3-carboxamide, 3-(L-menthoxy)propane-1,2-diol, p-menthane-3,8-diol, 3-(menthyloxy)propane-1,2-diol, (1R,2S)-N-(4-methoxyphenyl)-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, and the like. These may be used alone or in combination of two or more. In addition, other pest repellent ingredients such as DEET, permethrin, and eucalyptus oil may be added to icaridin (A).

Pests to which the present invention can be applied include those known as sanitary pests, nuisance pests, and agricultural pests. More specifically, examples include mosquitoes including Culex pipiens quinquefasciatus, Culex tritaeniorhynchus, Culex pipiens molestus, Aedes mosquitoes, Aedes aegypti, Aedes albopictus, Anopheles sinensis, and the like, flies including Musca domestica, Musca spp., Musca gracilis, Musca spp. ... These flying pests include, for example, Culex tritaeniorhynchus, Aedes albopictus, Aedes aegypti, stable fly, tsetse fly, and other insects known as blood-sucking or biting pests that transmit pathogens. In addition, moths such as the burr moth and the burr moth of the family Thunbergia gracilis, and moths such as the Indian meal moth and the family Pyralidae, whose larvae are known as clothing pests, and beetles such as the Dermestidae, Curculionidae, Conchidae, and Anobiidae, which are known as beetles. These are known to cause damage to food, agricultural crops, and the like, and some Dermestidae beetles also cause damage to clothing. Other examples include ants such as black mountain ants, brown ants, house ants, water ants, Argentine ants, and fire ants, wasps such as paper wasps and hornets, mites such as house mites and ixodid mites, and cockroaches.

In the present invention, the method for improving practical durability is not particularly limited, but if necessary, the aqueous dispersion of the icaridin of the present invention can be kneaded into the fibers, impregnated into the inside of the fibers, or various binder resins or crosslinking agents can be used in combination. The form of the binder resin is not particularly limited, but the binder resin can adhere the pest repellent component to the fibers and prevent it from falling off. Therefore, it can have high strength against physical impacts such as washing, and has excellent long-term repellent effect and washing durability. Furthermore, these resins may be used alone or in combination to form a resin layer.

The binder resin is preferably at least one selected from silicone resin, melamine resin, urethane resin, and acrylic resin. These may be used alone or in combination of two or more.

Examples of the crosslinking agent include isocyanate-based crosslinking agents such as hexamethylene diisocyanate and trimethylhexamethylene diisocyanate, but are not limited to these.

The pest repellent aqueous dispersion of the present invention can be applied appropriately to natural fibers such as cotton, wool, silk, and hemp, or synthetic fibers such as rayon, polyester, nylon, and acrylic, as well as blends thereof, and is particularly suitable for cotton, wool, rayon, polyester/cotton, etc., as it can impart a higher repellent effect than conventional pest repellent finishing agents. The material form may also be staple, filament, spun yarn, processed yarn, nonwoven fabric, woven fabric, knitted fabric, or even sewn textile products in a so-called piece state.

The present invention can be processed by a conventionally known processing method, for example, padding, spraying, coating, immersion, submerged processing, kneading, etc. can be applied. The padding method is a method in which fibers such as cotton are immersed in a processing liquid in which an aqueous dispersion is mixed with water, squeezed with a mangle, and then dried at 100 to 140°C. The immersion method is a method in which fibers such as denim, or fiber fabrics, or textile products are immersed in a processing liquid in which 2 to 10% by mass of the weight of the fibers is mixed with water to make 100% by mass, and the processing bath is heated to 30 to 80°C, preferably 30 to 50°C, while stirring, and processing is performed for 5 to 30 minutes, followed by centrifugal dehydration and drying in a tumble dryer.

The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. The evaluation methods used in the examples are shown below.

The pest repellency test was carried out by the following method, and a repellency rate of 70% or more was considered to be a pass.
Pest repellency test method Test cloth: 12 cm x 11 cm untreated cloth and treated cloth are attached to both sides of a 3 L container adjusted to 27 ± 2 ° C, and 5 female Aedes albopictus mosquitoes are released into it. The number of mosquitoes anchored to the treated cloth is counted four times in total, immediately after release (0 minutes), 30 minutes, 1 hour, and 2 hours, and the repellency rate is calculated using the following formula 1. Here, the total number of mosquitoes released is 5 × 4 times = 20 mosquitoes.

Washing conditions: Wash five times according to JIS L-0217 C4M method, then hang dry.

The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these. Note that % in the examples and comparative examples means % by mass unless otherwise specified.

The following oil components were used:
YF-3800: silanol silicone oil, manufactured by Momentive Co., Ltd. MORESCO WHITE 350P: liquid paraffin, manufactured by MORESCO Co., Ltd. NIKKOL refined olive squalane: vegetable squalane, manufactured by Nikko Chemicals Co., Ltd. NIKKOL olive oil: olive oil, manufactured by Nikko Chemicals Co., Ltd. KF96-50CS: dimethyl silicone, manufactured by Shin-Etsu Chemical Co., Ltd.

The following surfactants were used:
Excel O-95R: molecularly distilled monoglyceride plant-based olein type, HLB value 3.5, manufactured by Kao Corporation Excel S-95R: molecularly distilled monoglyceride plant-based stearin type, HLB value 3.8, manufactured by Kao Corporation
Emulgen 108: Polyoxyethylene lauryl ether, HLB value 12, manufactured by Kao Corporation

As the water-soluble polymer (D), the following was used.
PVA217: Polyvinyl alcohol, manufactured by Kuraray Co., Ltd. Polyvinylpyrrolidone K-85: Polyvinylpyrrolidone, manufactured by Nippon Shokubai Co., Ltd.

The following binder resins were used:
Parasol GH-908: Water-based acrylic resin, manufactured by Ohara Palladium Chemical Co., Ltd. The following cool feeling processing agents were used.
Paracool IDA: Contains sugar alcohol (xylitol), manufactured by Ohara Palladium Chemical Co., Ltd. Paracool CCS-1: Contains menthol derivatives, manufactured by Ohara Palladium Chemical Co., Ltd. Paracool CCS-3: Contains menthol derivatives, manufactured by Ohara Palladium Chemical Co., Ltd.

(Synthesis Example 1)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 2)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of Icaridin and 30 g of Moresco White 350P. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 3)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of Icaridin and 15 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 4)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 12 g of Icaridin and 48 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 5)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of icaridin and 30 g of NIKKOL refined olive squalane. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 6)
90 g of a 10% aqueous solution of polyvinylpyrrolidone K-85 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of icaridin and 30 g of NIKKOL olive oil. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 7)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel S-95R was added, followed by 30 g of Icaridin and 30 g of KF96-50CS. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 8)
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while adding 1.6 g of Excel O-95R and 0.4 g of Emulgen 108, followed by adding 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

(Synthesis Example 9)
105 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 15 g of Icaridin and 15 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

Comparative Synthesis Example 1
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix), while 2 g of Excel O-95R was added, followed by 30 g of Icaridin. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

Comparative Synthesis Example 2
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 30 g of Icaridin and 14 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

Comparative Synthesis Example 3
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while 2 g of Excel O-95R was added, followed by 10 g of Icaridin and 50 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion.

Comparative Synthesis Example 4
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix), while 2 g of Excel O-95R and 2 g of Emulgen 108 were added, followed by 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion. This aqueous dispersion separated and could not be processed.

Comparative Synthesis Example 5
90 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while adding 1.4 g of Excel O-95R and 0.6 g of Emulgen 108, followed by 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion. This aqueous dispersion separated and could not be processed.

Comparative Synthesis Example 6
2 g of Excel O-95R was added to 90 g of water, and while stirring at 5,000 rpm with a tabletop homogenizer (manufactured by Primix), 30 g of Icaridin and 30 g of YF-3800 were added. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion. This aqueous dispersion separated and could not be processed.

Comparative Synthesis Example 7
2 g of Excel O-95R and 10 g of Emulgen 108 were added to 90 g of water, and while stirring at 5,000 rpm with a tabletop homogenizer (manufactured by Primix), 30 g of Icaridin and 30 g of YF-3800 were added. Water was then added little by little to produce 300 g of an emulsified aqueous dispersion. This aqueous dispersion separated and could not be processed.

Comparative Synthesis Example 8
85 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while adding 2 g of Excel O-95R, followed by 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion. This aqueous dispersion separated and could not be processed.

Comparative Synthesis Example 9
215 g of a 10% aqueous solution of PVA217 was stirred at 5,000 rpm with a tabletop homogenizer (manufactured by Primix Co., Ltd.) while adding 2 g of Excel O-95R, followed by 30 g of Icaridin and 30 g of YF-3800. Water was then added little by little to prepare 300 g of an emulsified aqueous dispersion. This aqueous dispersion was highly viscous and difficult to dissolve in water, making it unprocessable.

Example 1
The aqueous dispersion (5 g) prepared in Synthesis Example 1 was diluted with water to prepare a processing solution (100 g). A 100% cotton knit and a 100% polyester knit were immersed in this processing solution, and squeezed with a mangle so that the pickup was 100%, and then dried at 110°C using a tenter-type baking machine to obtain a processed fabric. A pest repellency test was conducted on this processed fabric. The results are shown in Table 1.

(Examples 2 to 9)
The aqueous dispersions prepared in Synthesis Examples 2 to 9 were treated in the same manner as in Example 1, and a pest repellency test was carried out on each treated fabric. The results are shown in Table 1.

(Comparative Examples 1 to 3)
The aqueous dispersions prepared in Comparative Synthesis Examples 1 to 3 were treated in the same manner as in Example 1, and a pest repellency test was carried out on each treated fabric. The results are shown in Table 1.

Example 10
The aqueous dispersion (5 g) prepared in Synthesis Example 1 and Parasol GH-908 (2 g) were diluted with water to prepare a processing solution (100 g). A 100% cotton knit and a 100% polyester knit were immersed in this processing solution, and squeezed with a mangle so that the pickup was 100%, and then dried at 110°C using a tenter-type baking machine to obtain a processed fabric. A pest repellency test was conducted on this processed fabric. The results are shown in Table 2.

(Examples 11 to 18)
The aqueous dispersions prepared in Synthesis Examples 2 to 9 and Parasol GH-908 were treated in the same manner as in Example 10, and a pest repellency test was carried out on each treated fabric. The results are shown in Table 2.

(Comparative Examples 4 to 6)
The aqueous dispersions prepared in Comparative Synthesis Examples 1 to 3 were treated in the same manner as in Example 10, and a pest repellency test was carried out on each treated fabric. The results are shown in Table 2.

(Example 19)
The aqueous dispersion (5 g) prepared in Synthesis Example 1 and Paracool IDA (3 g) were diluted with water to prepare a processing solution (100 g). A 100% cotton knit and a 100% polyester knit were immersed in this processing solution, and squeezed with a mangle so that the pickup was 100%, and then dried at 110°C using a tenter-type baking machine to obtain a processed fabric. A pest repellency test was conducted on this processed fabric. The results are shown in Table 3.

(Example 20)
The aqueous dispersion (5 g) prepared in Synthesis Example 1 and Paracool CCS-1 (3 g) were diluted with water to prepare a processing solution (100 g). A 100% cotton knit and a 100% polyester knit were immersed in this processing solution, and squeezed with a mangle so that the pickup was 100%, and then dried at 110°C using a tenter-type baking machine to obtain a processed fabric. A pest repellency test was conducted on this processed fabric. The results are shown in Table 3.

(Example 21)
The aqueous dispersion (5 g) prepared in Synthesis Example 1 and Paracool CCS-3 (3 g) were diluted with water to prepare a processing solution (100 g). A 100% cotton knit and a 100% polyester knit were immersed in this processing solution, and squeezed with a mangle so that the pickup was 100%, and then dried at 110°C using a tenter-type baking machine to obtain a processed fabric. A pest repellency test was conducted on this processed fabric. The results are shown in Table 3.

From the above results, it can be seen that Examples 1 to 21 have a repellency rate of 70% or more and pass the pest repellency test.

In other words, regarding the blending ratio of icaridin (A) and oil component (B), if the ratio of (B) is less than (A):(B)=2:1, a good pest repellent effect cannot be obtained, and if the ratio of (B) is more than (A):(B)=1:4, the resulting aqueous dispersion becomes too viscous to be processed, and therefore it is difficult to achieve the object of the present invention if the limited range of the present invention is deviated from. Therefore, it is clear that the limited range of the present invention is essential.

Furthermore, with regard to surfactant (C), if the blending ratio of surfactants with an HLB value of 5 or less does not reach 80 mass %, a good aqueous dispersion cannot be obtained, and therefore, if the limited range of the present invention is exceeded, it is difficult to achieve the object of the present invention. Therefore, it is clear that the limited range of the present invention is essential.

In the present invention, by processing fibers, fiber fabrics, and textile products using a textile pest repellent aqueous dispersion, it is possible to obtain processed products with a higher repellent effect than those that use conventional pest repellent processing agents.

Claims (4)

The aqueous dispersion containing a pest repellent component is characterized in that the ratio of icaridin (A) to the oil component (B) is (A):(B)=2:1 to 1:4, 80 mass% or more of the surfactant (C) has an HLB value of 5 or less, and the ratio of the water-soluble polymer (D) to the total amount of icaridin (A) and the oil component (B) is 15 to 35 mass%. 2. The aqueous dispersion containing a pest repellent component according to claim 1, wherein the oil component (B) is at least one of silanol silicone oil, dimethyl silicone oil, squalane, olive oil, and liquid paraffin. 3. The aqueous dispersion containing a pest repellent component according to claim 1, wherein the water-soluble polymer (D) is polyvinyl alcohol and/or polyvinylpyrrolidone. A fiber fabric and a fiber product which are treated with the aqueous dispersion containing the pest repellent component according to any one of claims 1 to 3.