TW201608979A - Bed bug repellent, bed bug repelling composition and method for repelling bed bug - Google Patents

Abstract

The present invention provides a bed bug repellent comprising a silicon dioxide powder having an oil-absorption of 35 mL/100 g or more. The present invention also provides a bed bug repelling composition comprising the bed bug repellent. The present invention also provides a method for repelling bed bug by bringing a silicon dioxide powder having an oil-absorption of 35 mL/100 g or more into contact with a bed bug.

Description

Bed cockroach repellent, bed cockroach repelling composition and bed 虱 repelling method

The invention relates to a bed cockroach repellent, a bed cockroach repelling composition and a bed squeegee repelling method.

In the past, as a method of protecting yourself from blood inhalation by pests such as bed bugs, repellents containing N,N-diethylmethylbenzamide (DEET: to be ethene) have been known (for example, refer to the following patent documents). 1). However, due to the high rate of bed bug reproduction and the high hunger resistance, it can survive for several months to a maximum of one year without food intake, so that its survival will expand its habitat. Therefore, it is not possible to remove the mattress alone, but it must be killed and expelled. Moreover, the mattresses are mainly used at night, and during the day, they live in the darkness of the interior of the carpet, tatami corners, furniture (bed frames, wardrobes, etc.), corner stickers, closets, wall seams, etc. Its habitat is special and it is difficult to access a sufficient amount of pesticide. Therefore, it is not easy to completely remove the mattress with insecticide.

[Previous Technical Literature] Patent literature

Patent Document 1: Japanese Patent Laid-Open No. Hei 8-198708

Therefore, in the case of repelling bed bugs, it is common practice to consider the use of a repellent containing a pesticidal component such as a pyrethroid compound. However, there is a problem that the insecticidal component such as the pyrethroid compound has an increased resistance. In addition, it is expected to be safer and not to use such insecticidal ingredients to drive out bed bugs.

The present invention has been made in view of the above problems, and an object thereof is to provide a bed squeegee repellent, a bed squeezing composition, and a bed squeegee repelling method which can remove bed mites without using insecticidal components.

The bed cockroach repellent of the present invention is a cerium oxide powder containing an oil absorption of 35 mL/100 g or more.

The bed cockroach repellent of the present invention can drive out bed mites without using insecticidal ingredients. The reason why such an effect can be obtained in the present invention is not fully understood, but the inventors of the present invention presume as follows. That is, when the bed cockroach repellent of the present invention is in contact with the mattress, the surface components such as fatty acid and wax of the body surface of the mattress are absorbed by the cerium oxide powder. Therefore, the function of the bed body is lost, and it is estimated that the mattress will not be able to maintain the moisture required for survival. Therefore, the present invention uses a cerium oxide powder containing a specific oil absorption amount, whereby the surface component of the mattress can be effectively sucked, and it is presumed that the mattress can be driven off.

The bed mattress repelling composition of the present invention contains the above bed 虱 repellent. The bed mattress repellent composition according to the present invention, i.e., the bed mattress repellent of the present invention, can be used to drive off the mattress without using the insecticidal component.

The bed squeegee removal method of the present invention is a method for repelling a mattress of cerium oxide powder having an oil absorption of 35 mL/100 g or more. The bed 虱 repelling method according to the present invention, i.e., like the bed cockroach repellent of the present invention, can be used to drive out bed mites without the use of insecticidal ingredients.

According to the present invention, the mattress can be driven off without the use of insecticidal ingredients. Therefore, there is no concern that the resistance to insecticidal ingredients is increased, and bed mites that are already resistant to insecticidal ingredients can be removed. Meanwhile, according to the present invention, it is also possible to provide a cerium oxide powder having an oil absorption of 35 mL/100 g or more for use in repelling the mattress. According to the present invention, a composition containing a cerium oxide powder having an oil absorption of 35 mL/100 g or more is provided on the repellent bed.

A‧‧‧Processing area

B1, B2‧‧‧ untreated area

C‧‧‧Black paper

[Fig. 1] A diagram for explaining the test method in the examples.

Hereinafter, embodiments of the present invention will be described in detail.

(bed cockroach repellent)

The bed cockroach repellent in the present embodiment is a powder containing cerium oxide (also referred to as cerium oxide or ceric anhydride) having an oil absorption of 35 mL/100 g or more.

The oil absorption amount of the cerium oxide powder is preferably 40 mL/100 g or more, and 90 mL/100 g from the viewpoint of improving the removal efficiency of the mattress. More preferably, 110mL/100g or more is even better. Further, when the oil absorption amount is 150 mL/100 g or more, high repellent efficiency can be obtained even under high humidity conditions, and when the oil absorption amount is 200 to 300 mL/100 g, high repellent efficiency can be obtained for a long period of time even under high humidity conditions. When the oil absorption amount of the cerium oxide powder is 500 mL/100 g or less, a sufficient bed cockroach repelling effect can be easily obtained. The oil absorption amount of the cerium oxide powder may be 1000 mL/100 g or less, may be 500 mL/100 g or less, or may be 400 mL/100 g or less. When the oil absorption amount exceeds 1000 mL/100 g, the strength of the cerium oxide powder is lowered, and the feeling of use such as the broken powder during use is deteriorated. The oil absorption amount of the cerium oxide powder can be measured according to the method according to JIS K5101, ASTM D2414, and ISO 4656.

The cerium oxide powder is preferably amorphous in view of the fact that the oil absorption amount and the specific surface area are easily controlled. The cerium oxide powder may also be agglomerated between the powders to form agglomerated particles. The average particle diameter of the cerium oxide powder (mainly agglomerated particles) can be measured by a Coulter counter (Coulter particle size analysis method). The average particle diameter of the cerium oxide powder is preferably 2 μm or more from the viewpoint that the powder can sufficiently contact the bed and easily absorb the surface component such as wax from the bed body. Meanwhile, the average particle diameter of the cerium oxide powder is preferably 2 μm or more, more preferably 10 μm or more, and still more preferably 20 μm or more from the viewpoint of not easily flying when the repellent is spread. From the viewpoint of improving the workability at the time of processing, it is preferably 90 μm or more. When the average particle diameter is 90 μm or more, workability can be improved, and it is easy to treat with a bed cockroach repellent alone. The average particle diameter of the cerium oxide powder is preferably 500 μm or less from the viewpoint of excellent fluidity of the repellent and workability at the time of treatment. At the same time, on average When the particle diameter is 20 μm or less, it is also easy to penetrate into the body segment of the mattress. The average particle diameter is preferably 90 μm or more from the viewpoint of easily adhering to the entire surface of the mattress body and improving the removal efficiency.

The cerium oxide powder is preferably porous. The specific surface area of the cerium oxide powder is preferably 50 m ² /g or more, more preferably 200 m ² /g or more, from the viewpoint of improving the efficiency of the bed squeaking. The specific surface area of the silicon dioxide powder to 800m ² / g or less preferably, 500m ² / g or less more preferably. The specific surface area of the cerium oxide powder may be 1000 m ² /g or less. When the specific surface area exceeds 1000 m ² /g, the strength of the cerium oxide powder is lowered, and the feeling of use such as the flying powder which is broken during use is deteriorated. The specific surface area of the cerium oxide powder can be measured by a BET method according to the method of ISO 5794-1.

(bed cockroach repellent composition)

The bed-and-removal composition of the present embodiment contains a bed cockroach repellent containing a cerium oxide powder having an oil absorption of 35 mL/100 g or more, and an optional component other than the bed cockroach repellent.

In the bed-and-removal composition of the present embodiment, the content of the bed cockroach repellent is preferably 0.1% by mass or more based on the total mass of the bed squeezing composition, from the viewpoint of improving the efflux efficiency of the mattress. More preferably, 1% by mass or more. When the composition for the bedside repellent is an aerosol, the content of the bedside repellent is preferably 1% by mass or more based on the entire liquid solution. When the bed cockroach repellent is carried by the solid carrier, the content of the bed cockroach repellent is preferably 1% by mass or more based on the entire formulation, and more preferably 5% by mass or more from the viewpoint of improving the efflux efficiency of the mattress. It is more preferably 20% by mass or more. Bed cockroach repellent when it is removed by local treatment in the gap of furniture The content of the preparation is preferably 0.4% by mass or more based on the entire formulation, from the viewpoint of improving the fluidity and workability of the preparation.

The bed mattress repellent composition in the present embodiment may be used in various types of preparations, and a carrier such as a liquid or a solid may be used. The composition for bed release in the present embodiment can be prepared, for example, as a liquid preparation, a gel, a sol, a granule, a granule, a tablet, an aerosol, a tablet, a coating agent or the like. The method of preparing a carrier or the like may, for example, be a method of mixing the bed cockroach repellent of the present embodiment with a solid carrier, a liquid carrier, a gaseous carrier or the like; and the bed cockroach repellent and the solid carrier in the embodiment. A method of reshaping after mixing. The carrier may be used in a single type or in combination of two or more types. At the same time, the bed repelling composition may be carried on a solid carrier and then dispersed in a liquid carrier.

The solid carrier used in the preparation may, for example, be an inorganic powder such as calcium carbonate, calcium citrate, sodium sulfate, zeolite, talc, clay, bentonite, strontium, feldspar, acid white clay, diatomaceous earth powder, vermiculite powder or the like ( Does not contain metal powder); wood powder, flour, resin powder (polypropylene, polyethylene, polyamide, polyethylene terephthalate and other thermoplastic resins; copolymerized polyamide; copolymerized thermoplastic resin, etc.), corn starch, Organic powder such as silk powder; metal powder such as iron powder, alumina powder, copper powder. The bed cockroach repellent may be dispersed in the powder of the same size as the bed cockroach repellent, or the bed cockroach repellent may be carried by the powder having a larger particle size than the bed cockroach repellent.

Examples of the liquid carrier include alcohols such as water, ethanol, and isopropanol; fatty acid esters such as isopropyl myristate; esters such as propylene carbonate; hydrocarbons such as n-alkanes, isoalkanes, and cycloalkanes; and HFC-245fa; , ASAHIKLIN Hydrofluorocarbons such as AE-3000, ASAHIKLIN AC-6000 (manufactured by Asahi Glass Co., Ltd.); HFO-1233zd, HFO-1234yf, HFO-1234ze, Novec 7000 (manufactured by Sumitomo 3M Co., Ltd.) A fluorine-based solvent. The method of treating the liquid carrier in which the bedside repellent is dispersed may, for example, be a method of coating with an applicator such as a brush, a method of spraying using a hand pump or the like, or a method of directly spraying the container. In order to disperse the cerium oxide powder in a liquid carrier, a surfactant, a thickener or the like may be further added.

Examples of the gaseous carrier include butane gas, chlorofluorocarbon gas, substituted chlorofluorocarbon gas, liquefied petroleum gas (LPG), dimethyl ether, nitrogen gas, and carbon dioxide gas. Further, the power spreader or the sprayer of the venturi structure, the manual pump, or the sprayer for partial treatment can directly disperse the bed cockroach repellent treatment in the gaseous carrier, or the liquid carrier and the gaseous state in which the bed cockroach repellent is dispersed. The carrier is mixed and sprayed.

The bed mattress repellent composition of the present embodiment may further contain an optional component in a range that does not impede the effect of the bed mattress repellent in the present embodiment. Examples of the optional component include insecticidal components, attracting components, surfactants, antioxidants, preservatives, anti-feeding agents, and coloring agents. As the optional component, a cerium oxide powder having an oil absorption of less than 35 mL/100 g can be used. Further, in the bed-and-removal composition of the present embodiment, the mattress can be removed without using the insecticidal component, so that the bedside repelling composition can also contain no insecticidal component.

Examples of the insecticidal component include, for example, pyrethrum extract, pyrethrin, prallethrin, and methyrin. (imiprothrin), phthalthrin, allethrin, bifenthrin, resmethrin, phenothrin, cyphenothrin, permethrin ), cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenpropathrin, enyne Pyrethroids, silafluofen, transfluthrin, metofluthrin, pyrfluthrin, etc. Insecticides; fenitrothion, diazinon, malathion, pyridafenthion, prothiofos, phoxim, chlorpyrifos, diclofen ( Organophosphorus insecticides such as dichlorvos); urethane-based insecticides such as carbaryl, propoxur, methomyl, thiodicarb; Metoxadiazone and other oxadiazole-based insecticides; phenylpyrazole-based insecticides such as fipronil a sulfonamide-based insecticide such as amidoflumet; a neonicotinoid insecticide such as dinotefuran, imidacloprid, and nitenpyram; Pyrrole insecticides such as chlorfenapyr. The insecticidal component can be used in a single type or in two or more types. In the case of using the insecticidal component, the content of the insecticidal component is, for example, 0.1 to 50% by mass based on the total mass of the bedside repellent composition.

In terms of the attractant component, it can be widely used in the past for pest control. Examples of the attracting component include plant or animal bait such as protein, carbohydrate, and lipid; It is equipped with an aromatic aldehyde such as an aromatic component, pheromone, amino acid, nucleic acid, fat, hexenal or octynyl aldehyde; and an organic acid such as butyric acid. The attractant component can be used in a single type or in two or more types. When the attracting component is used, the content of the attracting component is, for example, 0.01 to 50% by mass based on the total mass of the bed-and-removal composition.

(bed smashing method)

The bed squeegee removal method in the present embodiment is a method of repelling a mattress of cerium oxide powder having an oil absorption of 35 mL/100 g or more. In the bed squeegee removal method of the present embodiment, the cerium oxide powder may be sprayed toward the bed, or the cerium oxide powder may be scattered in the bedside habitat. In the bed squeegee removal method of the present embodiment, the bed squeezing composition in the present embodiment can be used, and the mattress can be contacted with the cerium oxide powder. It can be pre-spreaded in the area where the bed is lurking or in the vicinity of the bed, so that the bed can be contacted during activities such as at night.

In the bed squeezing method of the present embodiment, the amount of cerium oxide powder (spraying concentration) is preferably 0.125 g/m ² or more, and more preferably 0.3 g/m ² or more, from the viewpoint of easily obtaining a sufficient repelling effect. Good, 0.5g/m ² or more is even better. The amount of cerium oxide powder to be spread to prevent the invasiveness of the bed or the local use of the habitat (preventive treatment) is preferably 200 g/m ² or less; In the case of local use (insecticidal), it is preferable that it is 100 g/m ² or less from the viewpoint of easily obtaining a sufficient repellent effect. When the amount of spreading is 200 g/m ² or less, the preparation can be prevented from being scattered around the treated portion, and a sufficient repellent effect can be obtained for a bed having a high density of habitat. When the floor of the house overall process, the amount of silicon dioxide powder of spreading to 40g / m ² or less preferably, the formulation of the waste can be reduced effectively get rid of the viewpoint, based at 20g / m ² or less more preferably.

Bed mattresses have strong activity in high temperature and high humidity, and have a high resistance to chemicals. On the other hand, in the bed smashing method of the present embodiment, the bed sputum can be removed in an environment of, for example, a temperature of 25 ° C and a humidity of 50% or more (for example, a mortality rate of 80% or more after 48 hours) at a temperature of 25 ° C. In the environment with a humidity of 75% and high humidity, the bed can be removed (for example, more than 80% of the lethality after 168 hours).

Example

Hereinafter, the present invention will be specifically described by way of examples. However, the invention is not limited to the following examples.

(Test 1)

First, various powders shown in Table 1 below were prepared as samples. In Table 1, SUNSPHERE is manufactured by AGC Si-Tech Co., Ltd., God Ball is manufactured by Suzuki Oil & Fats Co., Ltd., Adsolider is manufactured by Freund Industries Co., Ltd., PORONEX is manufactured by Maruo Calcium Co., Ltd., and FLORITE is limited by Tomita Pharmaceutical Co., Ltd. Made by the company.

First, on the bottom surface of the glass-made culture dish (Ø9cm×height 6.5cm), the filter paper is attached to the bottom of the bottom surface without any gap between the culture dish and the bed, and then the sample is uniformly spread on the bottom surface. 0.35 cm ³ (Distribution amount: Adsolider 101 having a specific gravity of 90 mL/5 g (0.056 g/mL) was about 3.0 g/m ² (about 55 cm ³ /m ² )). Next, the culture dish was allowed to stand in a closed container for one night (12 hours or more) in an environment of a temperature of 25 ° C and a humidity of 50%. The high-cultivation dish was also placed in a plastic case with a size of 310 mm (width) × 434 mm (deep) × 143 mm (height). The plastic box cover is sealed with a rubber pad. The humidity in the box is adjusted to 50% with concentrated glycerin. Thereafter, the bed was continuously forced to contact the sample with a test of 5 bed ticks (chiba system, permethrin resistance of 10,000 times or more) in a petri dish. The lethality was calculated by observing the number of lethal insects after the bed test. The same test was repeated again, and the lethality of a total of 10 mattresses was calculated, and the control effect was evaluated. The results are shown in Table 1.

As can be seen from Table 1, when the cerium oxide powder having an oil absorption of 35 mL/100 g or more was used, it was confirmed that a mortality rate of 90% or more was achieved after 48 hours. Therefore, a sufficient repellent effect of 80% or more of the lethality after 48 hours can be obtained.

(Test 2)

Various powders shown in Table 2 below were prepared as samples. In Table 2, OSC is manufactured by Oriental Silica Co., Ltd., and TOKUSIL is manufactured by Oriental Silica Corporation. The lethality of the mattress was evaluated in the same manner as in Test 1, except that the test environment was changed to a temperature of 25 ° C and a humidity of 60%. For comparison, it was also evaluated in the case where the cerium oxide powder was not sprayed. The results are shown in Table 2.

As can be seen from Table 2, in the examples, it was confirmed that a 100% lethality can be achieved after 72 hours. Therefore, a mortality rate of 80% or more can be obtained after 72 hours. At the same time, in the humidity of 60% of the high humidity conditions A full repellent effect can also be obtained.

(Trial 3)

Various cerium oxide powders shown in Table 3 below were prepared as samples. In Table 3, FINESIL is manufactured by Oriental Silica. The lethality of the mattress was evaluated in the same manner as in Test 1, except that the test environment was changed to a temperature of 25 ° C and a humidity of 75%. The results are shown in Table 3.

As can be seen from Table 3, in the examples, it was confirmed that a mortality rate of 80% or more was achieved after 168 hours. Therefore, a sufficient repellent effect can be obtained under extremely high humidity conditions of a humidity of 75% or more.

(Test 4)

Adorganizer 101 (manufactured by Freund Industries Co., Ltd.) of cerium oxide was prepared. In addition to changing the amount of spreading to about 0.125 g/m ² (about 2.3 cm ³ /m ² ), about 0.3 g/m ² (about 5.5 cm ³ /m ² ), about 0.5 g/m ² (about 9.2 cm ³ /m). ² ) and about 1.0 g/m ² (about 18.3 cm ³ /m ² ), the bed was calculated in the same manner as in Examples 1-6 (distribution amount: about 3.0 g/m ² , temperature 25 ° C, humidity 50%) The lethal rate of sputum, the effect of control. For comparison, it was also evaluated in the case where the cerium oxide powder was not sprayed. The results are shown in Table 4.

As can be seen from Table 4, in the examples, it was confirmed that the lethality of 80% or more was obtained after 48 hours in all the spread amounts. Therefore, it is understood that a sufficient repellent effect can be obtained even when the bed is not directly treated, even at a low concentration of the agent in the active period. Thus It is also expected that a sufficient repellent effect can be obtained in the bed of a gap in which the medicine is not easily reached.

(Test 5)

All of them were uniformly sprayed on the front side (15 cm × 15 cm) of the plywood with about 2.7 g of each sample (aerosol), and then left to stand overnight (25 ° C, 12 hours or more). Next, in a sealed container made of plastic at a temperature of 25 ° C and a humidity of 50% (in a closed container with a pad), 10 beds (Chiba, 100% of the resistance) are tested in the plywood. After the sample surface test, the plastic cup (Ø6 cm, height 3.5 cm) was covered, and the mattress was forcibly contacted with the sample for 1 hour. After that, move the mattress to a clean plastic cup and place the plastic cup in a closed container at a temperature of 25 ° C and a humidity of 50%. The number of lethal insects after 24 hours and 48 hours was observed and the lethality was evaluated. Thereafter, the same test was repeated 3 times, and the lethality of a total of 30 mattresses was calculated, and the control effect was evaluated.

For the sample, an aerosol containing 105 mL of the stock solution and 345 mL of the spray agent per 450 mL was used. The components of the stock solution were as shown in Table 5. As the ceria powder, TOKUSIL NP (manufactured by Oriental Silica Co., Ltd.) and Adsolider 101 (manufactured by Freund Industries Co., Ltd.) were used. The liquid carrier is a normal paraffin (manufactured by Sanko Chemical Industry Co., Ltd., trade name: NEOTHIOZOL). Use 52.2 mL per 100 mL of liquefied petroleum gas (LPGO, 15 MPa, 20 ° C) and DME (dimethyl ether) 47.8 mL of propellant (gas composition (mass ratio: 20 ° C): DME / LPGO, 15 MPa = 49.5/50.5 ). The amount of cerium oxide powder is about 0.6 g/m ² . The results are shown in Table 5.

(Test 6)

In the center of the test area of 20 cm × 27 cm shown in Fig. 1, the cerium oxide powder (Adsolider 101, manufactured by Freund Industries, Inc.) was uniformly distributed in a strip shape of 5 cm × 20 cm (distribution amount: about 3.0 g/m ² ( About 55 cm ³ /m ² )) The treatment area A was formed. Then, in the untreated area B1 of the two unprocessed areas B1 and B2 of the clip processing area A, since the bed is in a narrow place, the black paper C of 5 cm × 5 cm in a place where the bed is lurking is provided. . In an environment of a temperature of 25 ° C and a humidity of 50%, 10 tests were carried out on the untreated area B2 where the black paper C was not provided, and the bed was tested (the Chiba system, the hunter-resistant resistance was 10,000 times or more). The number of dead insects after an hour. The mattress is moved from the unprocessed area B2 to the unprocessed area B1 via the processing area A. Thereafter, the same test was repeated twice, and the fatality rate of a total of 20 beds was evaluated, and the mortality rate was 100%.

Therefore, it can be seen that even when the mattress cannot be directly treated with a drug, a sufficient repelling effect can be obtained by treating the periphery of the latent place. Moreover, when it reaches the latent place (dark place) and violently under the medicament, when it reaches the latent place, it will die at that place, thereby preventing the expansion and invasion of the habitat.

(Test 7)

On the bottom surface of the glass-made culture dish (Ø9 cm × height 6.5 cm), the filter paper was attached to the entire bottom surface with no gap between the culture dish and the bed, and then uniformly treated with the sample on the bottom surface. In the examples, the sample was made of cerium oxide powder, and the amount of cerium oxide powder was about 3.0 g/m ² (about 55 cm ³ /m ² ). As the ceria powder, Adsolider 101 (manufactured by Freund Industries Co., Ltd.) and TOKUSIL NP (manufactured by Oriental Silica Co., Ltd.) were used. In the comparative example, the sample was made of Baishenning (insecticidal ingredient), and the filter paper was soaked in acetone with acetone. The treatment amount of chlorpheniramine was 100 mg/m ² (0.63 mg/dish).

Next, in a temperature of 25 ° C and a humidity of 50%, the culture dish was allowed to stand in a plastic closed container for one night (12 hours or more), and then five beds were placed in the culture dish (Chiba, Baishenning) The test was 10,000 times or more) and the bed was continuously forced to contact the sample for 12 hours. Then, move the mattress to a clean plastic cup and place the plastic cup in a closed container at a temperature of 25 ° C and a humidity of 50%. The lethality was measured after 24 hours of observation. The same test was repeated and the lethality of a total of 10 mattresses was calculated. At the same time, the same evaluation was carried out by replacing the resistant mattress with a sensitive bed mattress (Dijing). The results are shown in Table 6.

As can be seen from Table 6, in the examples, it was confirmed that a 100% lethality was achieved after 24 hours for any resistant mattress and sensitive bed, and it was confirmed that a sufficient repellent effect was obtained.

(Trial 8)

The whole was uniformly dropped on the front side (15 cm × 15 cm) of the plywood with about 3.0 g of a sample (water dispersant), and left to stand overnight (25 ° C, 12 hours or more). Secondly, in a plastic closed container with a temperature of 25 ° C and a humidity of 50% (including In the closed container of the mat), the bed is covered with a plastic cup (Ø6cm, height 3.5cm) after the test of the sample surface of the plywood with 5 beds (Chiba, 100% of the resistance).虱 Force the sample to contact for 1 hour. After that, move the mattress to a clean plastic cup and place the plastic cup in a closed container at a temperature of 25 ° C and a humidity of 50%. Then observe the number of dead insects after 24 hours and measure the lethality. Thereafter, the same test was repeated 3 times, and the lethality of a total of 15 beds was calculated, and the control effect was evaluated.

The components shown in Table 7 were used as the constituent components of the sample. As the ceria powder, Adsolider 101 (manufactured by Freund Industries, Inc.) was used. The liquid carrier uses water and ethanol. The amount of the cerium oxide powder is about 3.0 g/m ² . The results are shown in Table 7.

As is apparent from Table 7, even if a bed cockroach repellent which is physically dispersed in a liquid carrier such as water or ethanol is used, a sufficient repellent effect can be obtained.

A‧‧‧Processing area

B1, B2‧‧‧ untreated area

C‧‧‧Black paper

Claims (3)

A bed cockroach repellent comprising cerium oxide powder having an oil absorption of 35 mL/100 g or more. A bed mattress repellent composition comprising the bed mattress repellent as described in claim 1 of the patent application. A bed squeezing method for contacting a mattress with a cerium oxide powder having an oil absorption of 35 mL/100 g or more.