JPH04365439A - Diffusing volatile agent and diffusing fan used therefor - Google Patents

Abstract

PURPOSE:To diffuse a volatile agent in high efficiency by holding the volatile chemical on a fan and rotating the fan by a driving means. CONSTITUTION:A volatile agent is supported on a fan and the fan is rotated by a driving means to diffuse the volatile agent into the air. In the diffusion, the fan and/or introduced air is preferably heated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for diffusing volatile chemicals that has high volatilization efficiency and can increase the amount of volatilization, and a diffusion fan used therein.

Note that the fan refers to a portion of a blower that has blades.

[Conventional technology]

Conventionally, most of the methods of diffusing volatile drugs to a predetermined location are by natural diffusion, but this takes time, and if you want to diffuse quickly, you can heat the carrier that holds the volatile drug, or Alternatively, a method is known in which air is blown out with an air blower and the air is applied to a carrier holding a volatile chemical to forcibly volatilize the chemical.

[Problem to be solved by the invention]

When the drug held on the carrier is forcibly volatilized by the above-mentioned blower, it may be because the blown air does not come into sufficient contact with the carrier holding the volatile drug, or even if it makes contact because the wind is weak. Since the wind force was small and the force promoting sustained release of the drug from the carrier was small, satisfactory diffusion of the drug was not achieved.

An object of the present invention is to provide a method that can sufficiently volatilize volatile chemicals when the volatile chemicals are forcibly evaporated by air blowing by the rotation of a fan of an air blower, and a fan that also serves as a drug carrier for that purpose. It is something.

[Means to solve the problem]

The present invention allows the volatile agent to be held directly by the fan;
This was done by finding that the volatilization was significantly increased, and the above object was achieved by the following means.

(1) A method for diffusing a volatile drug, which comprises holding the volatile drug in a fan and rotating the fan by a driving means to diffuse the volatile drug into the air.

(2) The method for diffusing a volatile chemical according to item (1) above, characterized in that the fan and/or the air introduced therein is heated.

(3) A drug diffusion fan characterized by holding a volatile drug inside and/or on its surface.

Volatile chemicals used in the present invention include pest control agents (insecticides), fungicides, repellents, fragrances (perfumes,
herbs, etc.), pharmaceuticals (menthol, eucalyptus oil, etc.),
Various drugs used for purposes such as inhalation drugs for trachea, colds, etc. can be used.

Typical drugs include the following:

(I) Insecticide (1) Pyrethroid insecticide/3-allyl-2-methylcyclopent-2-ene-4
-one-1-yl d■-cis/trans-chrysanthemate (generic name allethrin; trade name pinamine) ・3-allyl-2-methylcyclopent-2-ene-4
-on-1-yl d-cis/trans-chrysanthemate (trade name: Pinamiforte: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as "Pinamiforte") ・3-allyl-2-methyl-4-oxocyclopenta-
2-enyl trans-2,2-dimethyl-3-cyclopropanecarboxylate (common name: bioallethrin:
Product name: Exrin (manufactured by Sumitomo Chemical Co., Ltd.).

・N-(3,4,5,6-tetrahydrophthalimide)-
Methyl d■-cis/trans-chrysanthemate (generic name: phthalthrin; trade name: neopinamine; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as "neopinamine") -5-benzyl-3-furylmethyl d-cis/trans-chrysanthemate Mart (trade name: Crysuron Forte, manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as "Crysuron Forte") ・3-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (general Vermethrin: Trade name Exmin: Manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as "Exmin") ・3-phenoxybenzyl d-cis/trans-chrysanthemate (Generic name Phenothrin: Trade name Sumitrin: Manufactured by Sumitomo Chemical Co., Ltd.,・α-cyano-3-phenoxybenzyl 2-(4-chlorophenyl)-3-methylbutyrate (generic name: fenvalerate, hereinafter referred to as “fenvalerate”) ・α-cyano-3-phenoxybenzyl 2, 2, 3,
3-tetramethylcyclopropanecarboxylate (generic name: fenpropathrin, hereinafter "fenpropathrin")
・1-ethynyl-2-methylpent-2-enyl-2,
2-dimethyl-3-cyclopropanecarboxylate (
Generic name: empensuline (hereinafter referred to as "empensuline") ・2,3,4,5,6-pentafluorobenzyl-3-
(2,2-dichlorovinyl)-2-dimethylcyclopropanecarboxylate (generic name: fenfluthrin, hereinafter referred to as “fenfluthrin”) (2) Organophosphorus insecticide・O,O-dimethyl O-(2, 2-dichloro)vinyl phosphate (hereinafter referred to as "DDVP") ・O,O-dimethyl O-(3-methyl-4-nitrophenyl]thionophosphate ・O,O-diethyl O
-2-isopropyl-4-methyl-pyrimidyl-(6)
-thiophosphate O,O-dimethyl S-(1,
2-dicarboethoxyethyl)-dithiophosphate (3) Carbamate insecticide/O-isopropoxyphenyl methylcarbamate (
(hereinafter referred to as "Bigon") (II) Bactericide - S-n-butyl-S'-p-tert-butylbenzyl N-3 pyridylimidodithiocarbonate (trade name Denmart: manufactured by Sumitomo Chemical Co., Ltd., hereinafter "Denmart") N-(3',5'-dichlorophenyl)-1,2-dimethyl-cyclopropane-dicarboximide (trade name: SUMILEX: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as "SUMIREX"), Peryl Aldehyde, allyl isothiacyanate, parachloromethaxylenol (hereinafter referred to as "PCMX") (III) Repellent - N,N-diethyl m-toluamide (hereinafter referred to as "DET")
・Di-n-butyl succinate (hereinafter referred to as “DNBS”) ・Di-n-propyl isocincomeronate (hereinafter referred to as “D
PIC") Various commonly used additives such as efficacy enhancers, volatilization rate improvers, deodorants, fragrances, etc. can be optionally added to the above-mentioned insecticides used in the present invention. Efficacy enhancers include piperonyl butoxide, N-propylisome, MGK-264, Cinepilin 222, Cinepilin 500, Riesen 384, IBTA, S-421, etc., and volatilization rate improvers include phenethyl isothiocyanate, HI Examples of deodorants include dimethyl mixed acid, lauric acid methacrylate (LMA) and the like as deodorants, and citral, citronellal, anethole and the like as fragrances.

Although any size and shape of the fan can be used in the present invention, it is preferable to use one that is suitable for the model of the blower that has the ability to blow air according to the required amount of air. It is sufficient to use a fairly small fan for a space equivalent to a living room in a normal house, and the rotation speed of the fan is preferably 300 rpm or more, preferably about 500 to 10,000 rpm. A motor, a spring, etc. can be used as a driving means for the fan. For the above-mentioned living room-sized space, a fan driven by a small motor powered by dry cell batteries or the like can be sufficiently effective.

There are various means for retaining volatile chemicals in the fan, which can be roughly divided into (1) retention within the fan;
2) There is a method of holding it on the surface.

In the method (1), (a) the fan itself is made of an oil-absorbing material (e.g. resin) mixed with a volatile chemical;
b) It is possible to take measures such as constructing the entire fan or the inner layer close to the surface thereof from a porous oil-absorbing material, and impregnating the porous oil-absorbing material portion with a volatile chemical.

Method (2) involves (c) applying a liquid containing a volatile chemical to the fan surface, (d) attaching a piece of oil-absorbing material containing or impregnated with a volatile chemical to the fan surface, etc. You can take steps.

In the above method, once the volatile drug has been consumed, (a
) method requires replacing the fan itself, and method (d) requires replacing the oil-absorbing material piece.
) In each of the impregnation type methods, volatile chemicals may be replenished.

Examples of the oil-absorbing materials include pulp, fabric, natural fiber, sponge, inorganic powder, porcelain, earthenware, activated carbon, glass wool, asbestos, acrylic lipophilic polymer (manufactured by Kyowa Gas Chemical Co., Ltd.), and acrylic Super oil absorbent resin KX-OA 1
00-600 (manufactured by Nippon Shokubai Co., Ltd.), polypropylene fiber (registered trademark Ryzin Oil Soap, manufactured by Unicell Co., Ltd.), polypropylene fiber nonwoven fabric (registered trademark Toughness Oil Plotter, manufactured by Mitsui Petrochemical Industries, Ltd.), special wire Polymer (registered trademark: Washep, manufactured by Toray Industries, Inc.), etc.
Examples include species or a combination of two or more species. Among the above materials, those passed through the above method may be selected and used.

In the above method (a), it is preferable that the oil-absorbing material (e.g. resin) constituting the fan contains volatile chemicals in the range of 100 to 5000 mg/g, and in the impregnation type of method (d), the oil-absorbing material to be attached Volatile chemicals in the material of the piece are 100%
The content is preferably in the range of ~5000 mg/g.

In methods (b) and (c), a suitable usage amount is set per surface area of the fan.

In addition, if the volatile agent held by the fan is difficult to volatilize at room temperature and you want to increase the amount of volatilization, you can place a heater in the air introduction path of the blower to preheat the air that comes into contact with the fan. Measures such as placing a heater near the fan to heat the surface of the fan can be adopted.

A sufficient effect can be obtained by raising the heating temperature by 20 to 100°C or more above room temperature. In the case of highly volatile drugs such as empensuline, an increase of about 20 to 30 degrees Celsius is effective, but in the case of drugs with low volatility at room temperature, this level of increase will not be effective, so it is necessary to increase the temperature a little more. is necessary.

[Effect]

In the conventional technology in which a blower blows air onto a carrier holding a volatile chemical to volatilize it, the speed of the air determines the speed of mass transfer, and the wind speed is not very high, and the entire amount of air does not affect the carrier effectively. However, in the present invention, the agent is held in a fan, and since this fan generally has a high rotational speed, the contact speed with air is significantly higher than in the prior art, and a large fan surface can be utilized. Therefore, the mass transfer rate and, in turn, the amount of mass transfer can be significantly increased. Therefore, in the present invention, the amount of diffusion of the drug can be increased, and the drug can be diffused very efficiently.

In addition, if this is done under heating conditions as described above, the amount of diffusion can be made sufficiently large.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

However, the present invention is not limited only to these examples.

Example 1 Motor driven by AA alkaline batteries (rotation speed 210)
A blower was constructed in which a fan with four blades and a diameter of 2.5 cm was attached to a rotating shaft (0 rpm).

This fan was prepared by containing the chemicals listed in Table 1 and having the fan itself or the type of base material for holding the fan.

The compound names of the drugs used, other than those already explained, are as follows.

M-108A: 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2-methyl-1'-propenyl)cyclopropane-1-carboxylate M-108B: 1-ethynyl-2-methyl -2-Pentenyl 2,2,3,3-tetramethylcyclopropanecarboxylate M-108C: 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2',2'-dichlorovinyl) Cyclopropane-1-carboxylate deet: N,N-diethyl-m-triamide Example 2 As a fan of the present invention, four blades were molded from 10 wt% of empenthrine kneaded into 1.4 g of polyvinyl chloride resin. An activity test against insects was conducted using this product.

Insecticidal activity test against insects 0.012 m2 glass cylindrical water tank (inner diameter 23 cm,
A space with a height of 28.6 cm) was placed with cotton impregnated with about 50 m of water on the bottom, and about 50 adult star flies were placed there. A blower equipped with the fan of the present invention was placed on the side of the space (5 cm from the top). The device was attached to the device, and a motor connected to the device allowed it to rotate at 2100 rpm, and the drug was diffused by rotating the device. However, the opening of the water tank is covered with a polyvinylidene chloride sheet to create an airtight space.

Differences in volatilization and diffusion of the drug in this test were evaluated by the difference in the knockdown time of adult star flies placed in the space.

Also, as a control, a fan holding the drug (same weight)
I used something that simply hung in the center of the space. For comparison, polyvinyl chloride resin 1, which is the same material as above, is used.
．． A plate-shaped body formed from 4g of Vapor Surin mixed with 10wt% was hung near the side of the space, and a fan made of polyvinyl chloride resin having the same shape as the fan of the present invention was used as the fan of the present invention. Place it in the same position, 2100r
pm, and the air was applied to the plate-shaped body.

The test results are shown in Table 2.

As is clear from Table 2 above, according to the present invention, by directly holding the volatile drug in the fan, the knockdown time of star flies is considerably shortened, and the volatilization and diffusion of the drug into the space is significantly reduced. It can be seen that sexuality is promoted.

Example 3 Ethylene-methyl methacrylate copolymer resin (hereinafter referred to as
(referred to as "EMMA resin") is made by kneading the plasticizers dimethyl phthalate and empensuline, forming it into a sheet, and cutting this sheet to produce an empensuline-containing EMMA resin plate. The initial empensurin content of the resin plates was 9.6175 w/w%.Four of the plates were attached as blades to the central member of the fan to form a fan. The total weight of this blade portion was 1.7973 g.

When this fan was rotated by a high-speed motor with a rotation speed of 8,500 rpm, the amount of empensurin volatilized was 0.7293 mg/hr.

Furthermore, when this fan was rotated by a low-speed motor with a rotation speed of 2,130 rpm, the amount of empensurin volatilized was about 0.53 mg/hr.

If this fan is driven by a slow speed motor such as 400 to 800 rpm powered by dry batteries, the amount of empensurin volatilized will be even smaller, so in this case it is suitable for long-term use.

〔Effect of the invention〕

The present invention can significantly increase the amount of diffusion of volatile chemicals by allowing the fan to hold the volatile chemicals. Therefore, it can be used efficiently in a wider area. In addition, because the diffusion efficiency is good, compared to the conventional method of applying air from a blower to a carrier carrying a volatile drug, it can be carried out using a smaller blower. It is also sufficient to use a blower driven by a motor powered by.

Furthermore, if it is desired to increase the amount of diffusion of the volatile agent, this can be done by preheating the air introduced into the blower by the heating means and/or by heating the fan itself. The amount of volatilization in this case is considerably larger than that in the case of simply heating the conventional carrier.

In addition, when supporting a base material containing volatile chemicals on the surface of the fan used for this purpose, it is possible to continue using the base material by replacing the base material or replenishing the chemical, or by using the fan itself or its blades to support volatile chemicals. When the fan is made of a material containing a drug, such as a synthetic resin, it is highly practical because it can be used continuously by replacing the fan itself.

Claims (3)

[Claims] 1. A method for diffusing a volatile drug, which comprises holding the volatile drug in a fan and rotating the fan by a driving means to diffuse the volatile drug into the air. 2. The method for diffusing volatile chemicals according to claim 1, further comprising heating the fan and/or the air introduced therein. 3. A drug-diffusing fan characterized by holding a volatile drug inside and/or on its surface.