JP2023070189A - Volatilization body and chemical volatilizer containing the same - Google Patents

Abstract

To provide a volatilization body that does not have problems such as large decrease in the amount of volatilization of volatile chemical or stopping of volatilization until volatilization end period, and can realize a stable volatilization until the end, and to provide a chemical volatilizer containing the same.SOLUTION: A volatilization body volatilizes volatile chemical that comprises a cork material and a binder, and in which, when immersed in an isoparaffin-based solvent having 10 to 16 carbon atoms and a vapor pressure of 0.05 kPa or less (20°C) under a condition of 25°C temperature for 48 hours, the oil absorption per unit volume determined by the following formula is 80 mg/cm3 or more. Oil absorption per unit volume [mg/cm3]=(Weight of volatilization body after immersion [mg]-Weight of volatilization body before immersion [mg])/Volume of volatilization body [cm3].SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a volatilization body and a chemical volatilization device containing the volatilization body.

Currently, various forms of chemical volatilizers have been proposed and are commercially available. For example, as shown in Patent Document 1, a chemical volatilizer is disclosed in which a liquid volatile chemical is contained in a container having an opening at the top, and a rod-shaped volatilizing body is inserted from the opening of the container and soaked in the volatile chemical. It is In such a chemical volatilizer, the volatile chemical travels along the rod-shaped volatilizing body and volatilizes to the outside. Such volatilizers are widely used, especially for deodorants and the like, because they are excellent in interior decoration. In addition, as the volatilization material, there are those containing plant stems such as rattan and resins such as polyester.

JP 2016-124603 A

However, with conventional volatilization bodies or chemical volatilizers, at the end of volatilization, the amount of volatilization of the volatile chemical is greatly reduced and volatilization stops, making it difficult to achieve stable volatilization until the end.

The present invention has been made in view of the above-mentioned conventional situation, and realizes stable volatilization until the end without problems such as the amount of volatilization of the volatile chemical being greatly reduced or volatilization being stopped until the end of volatilization. It is an object of the present invention to provide a volatilization body capable of

As a result of intensive studies to solve the above problems, the present inventors have found that in a volatilization body for volatilizing a volatile chemical containing a cork material and a binder, per unit volume obtained by a predetermined method The inventors have found that the above-mentioned problems can be solved by setting the oil absorption of the oil to a certain range, and have completed the present invention.

That is, the present invention relates to the following <1> and <2>.
<1> A volatilization body for volatilizing a volatile chemical,
comprising a cork material and a binder;
When immersed in an isoparaffinic solvent having a carbon number of 10 to 16 and a vapor pressure of 0.05 kPa or less (20°C) at a temperature of 25°C for 48 hours, the oil absorption per unit volume determined by the following formula is 80 mg/cm ^{3 .} The volatilization body which is above.
Oil absorption per unit volume [mg/cm ³ ] = (weight of volatile material after immersion [mg] - weight of volatile material before immersion [mg]) / volume of volatile material [cm ³ ]
<2> A chemical volatilizer, comprising the volatilization body and the volatile chemical according to <1>, wherein at least a part of the volatilization body is in contact with the volatile chemical.

The volatilization body of the present invention and the chemical volatilizer containing the same do not have problems such as a large decrease in the volatilization amount of the volatile chemical until the end of volatilization or stop volatilization, and can realize stable volatilization until the end. .

FIG. 1 is a diagram showing one embodiment of the volatilization body of the present invention.

Although the present invention will be described in detail below, these show examples of preferred embodiments, and the present invention is not limited to these contents.
In this specification, the numerical range "A to B" indicates "A or more and B or less".

[volatilization]
The volatilization body of the present invention is a volatilization body for volatilizing a volatile chemical.
The volatile material of the present invention includes a cork material and a binder. The cork material is obtained by peeling and pulverizing the bark of cork oak, and by mixing this with a binder and molding, the volatile material of the present invention can be produced.

The method of molding the volatilizable body of the present invention from the mixture of cork material and binder is not particularly limited. Examples of such molding means include a compression molding method, a calendar roll molding method, and the like.

The binder contained in the volatile material of the present invention is not particularly limited as long as it can be mixed with the cork material and molded.
Examples of binders include urethane resins, epoxy resins, polyethylene resins, phenol resins, rubbers (natural rubbers, synthetic rubbers), etc. At least one selected from these groups can be used.
The content of the binder contained in the volatile material of the present invention is not particularly limited as long as the oil absorption per unit volume described below is satisfied. From the viewpoint of moldability, the content of the binder is preferably 5 to 70 parts by weight, more preferably 7.5 to 60 parts by weight, and more preferably 10 to 50 parts by weight with respect to 100 parts by weight of the cork material. Part is more preferred.

The volatile material of the present invention has an oil absorption per unit volume of 80 mg/cm ³ or more.
The oil absorption per unit volume referred to in this specification is the following when immersed in an isoparaffinic solvent having a carbon number of 10 to 16 and a vapor pressure of 0.05 kPa or less (20 ° C.) at a temperature of 25 ° C. for 48 hours. Means a value that can be determined by a formula.
Oil absorption per unit volume [mg/cm ³ ] = (weight of volatile material after immersion [mg] - weight of volatile material before immersion [mg]) / volume of volatile material [cm ³ ]
If liquid adheres to the surface of the volatilization body, remove it and then measure the weight of the volatilization body after immersion. In addition, in the case of a volatilization body having a large volume, a test piece obtained by cutting a part of the body may be used to obtain the oil absorption per unit volume. For example, the oil absorption per unit volume of the volatilization body can be obtained by using a rectangular parallelepiped test piece with dimensions of 5.0 mm×5.5 mm×100 mm cut from the volatilization body.

The volume of the volatilized body when determining the oil absorption per unit volume of the volatilized body means the total volume including voids in the volatilized body. For example, the oil absorption per unit volume is calculated assuming that the volume of the above-described rectangular parallelepiped test piece with dimensions of 5.0 mm×5.5 mm×100 mm is 2750 mm ³ (=2.75 cm ³ ). In addition, when the volatilization body expands or contracts by immersion, the oil absorption per unit volume is obtained based on the volume of the volatilization body before immersion.
In addition, as the isoparaffin-based solvent having a carbon number of 10 to 16 and a vapor pressure of 0.05 kPa or less (20 ° C.) used for determining the oil absorption per unit volume of the volatile material, for example, IP Solvent 2028 (Idemitsu Kosan Co., Ltd. company's isoparaffin solvent) and the like.

The volatile substance of the present invention takes in a volatile chemical from a container or the like according to the oil absorption amount per unit volume, and the taken-in volatile chemical is volatilized into the atmosphere. Then, the volatile chemical is continuously volatilized by the volatile body taking in the volatile chemical in a form that compensates for the volatilized volatile chemical. The larger the oil absorption per unit volume of the volatile substance of the present invention, the better it is possible to incorporate the volatile chemical. There is no problem such as the above, and stable volatilization is possible until the end.

The oil absorption per unit volume of the volatile material of the present invention is 80 mg/cm ³ or more. From the viewpoint of maintaining the volatilization amount of the volatile agent within an appropriate range until the end of volatilization, the oil absorption per unit volume is preferably 100 mg/cm ³ or more, more preferably 120 mg/cm ³ or more, and 150 mg. /cm ³ or more, and particularly preferably 170 mg/cm ³ or more.
The upper limit of the oil absorption per unit volume of the volatile material of the present invention is not particularly limited, and the saturation amount inherent to the volatile material is the practical upper limit. Although the saturation amount varies depending on the volatilized material, for example, about 700 mg/cm ³ from the solvent used (isoparaffinic solvent having a carbon number of 10 to 16 and a vapor pressure of 0.05 kPa or less (20 ° C.)) and the temperature condition of 25 ° C. is. Therefore, it is possible to set the upper limit of the oil absorption per unit volume of the volatile material of the present invention to 700 mg/cm ³ . Also, for example, the oil absorption may be 500 mg/cm ³ or less, preferably 350 mg/cm ³ or less.

The oil absorption per unit volume of the volatilization body of the present invention can be set within a desired range by appropriately selecting and adjusting the raw material of the volatilization body, molding conditions, and the like. For example, it is possible to adjust the oil absorption per unit volume of the volatile material by selecting the particle size and binder of the cork material that is the raw material of the volatile material, and by adjusting the cross-sectional area of the cork material contained in the volatile material. Become. Specifically, when the grain size of the cork material is reduced, the oil absorption amount increases, and when the grain size of the cork material is increased, the oil absorption amount decreases. If the amount of binder compounded is reduced, oil absorption increases, and if the amount of binder compounded increases, oil absorption decreases. When a urethane resin is used as a binder, a urethane resin with a low viscosity will increase the oil absorption, and a urethane resin with a high viscosity will reduce the oil absorption. Further, when the cross-sectional area of the cork particles is reduced, the oil absorption increases, and when the cross-sectional area of the cork particles is increased, the oil absorption decreases.

The shape, size, etc. of the cork material contained in the volatilization body of the present invention are not particularly limited. From the standpoint of making moldability and oil absorption per unit volume appropriate, the grain size width of the cork material should be 0.05 mm to 10 mm before it is mixed with a binder and molded (raw material stage). is preferred, 0.1 mm to 6 mm is more preferred, and 0.2 mm to 4 mm is even more preferred.
The particle size range of the cork material as used herein means the range of particle sizes in which 95% by weight or more of the cork material exists, and can be confirmed by sieving with a mesh. In this specification, for example, a cork material having a total of 5% by weight or less of a cork material that does not pass through a sieve with an opening of 10 mm and a cork material that passes through a sieve with an opening of 0.05 mm is It is called cork material with a grain size width of 10 mm.

In addition, the grain size width of the cork material in the state (raw material stage) before being mixed with the binder and molded correlates with the ratio of the cross-sectional area of the cork material contained in the volatilized body.
The ratio of the grain cross-sectional area as used herein can be obtained by the following procedure.
(1) Color the cork material on the surface of the volatilization body with a dye solution.
(2) Obtain a microscope image of the volatilized surface of the colored portion.
(3) The boundary of the cork material projected on the obtained microscope image is traced with a pen to determine the area of each cork material contained in the volatilized body surface.
(4) Capture an image in which the region of each cork material is determined, and measure the area (particle cross-sectional area) of the region of each cork material on the surface of the volatile material.
(5) The ratio of the number of regions whose area is within a predetermined range to the total number of regions of cork material present in the entire measurement portion is obtained as the ratio of the cross-sectional area of the particles.

The ratio of the number of areas of the cork material having an area of 1.0 mm ² or less on the surface of the volatilization body of the present invention is not particularly limited, but from the viewpoint that more stable volatilization can be achieved, 1.0 mm ² obtained by the above procedure The ratio of the number of cork material regions having the following area is preferably 20% or more, more preferably 50% or more, further preferably 60% or more, and 80% or more. Especially preferred. It is not clear why more stable volatilization can be achieved when the number of cork material regions having an area of 1.0 mm ^{2 or} less on the volatilization body surface is within the above range. This is probably because when the ratio of the number of areas of the cork material having an area is large, the surface area of the cork material increases, making it difficult to reduce the volatilization amount.
The ratio of the number of cork material regions having an area of 1.0 mm ² or less on the surface of the volatilization body can be appropriately adjusted by adjusting the grain size width of the cork material that is the raw material of the volatilization body.

The binder contained in the volatile material of the present invention is not particularly limited as described above, but from the viewpoint of making the oil absorption per unit volume an appropriate range, it is one or more selected from the group consisting of urethane resins and epoxy resins. is preferred.

The density of the volatile material of the present invention is not particularly limited. From the viewpoint of improving volatilization performance, the density of the volatile material is preferably 0.100 g/cm ³ to 0.600 g/cm ³ , more preferably 0.130 g/cm ³ to 0.300 g/cm ³ . , 0.150 g/cm ³ to 0.200 g/cm ³ .
Density as used herein means the density that can be obtained by weight/volume by measuring the weight of the volatilized material, determining the volume from the dimensions. Further, the volume of the volatilized body when determining the density of the volatilized body can be determined in the same manner as the volume of the volatilized body when determining the oil absorption per unit volume of the volatilized body.
The density of the volatilized material can be appropriately adjusted by the mixing ratio of the cork material and the binder, the amount charged during molding, the pressure conditions, and the like.

The shape of the volatilization body of the present invention is not particularly limited. Arbitrary shapes such as a bar, a corrugated bar, a columnar shape, a corrugated columnar shape, a plate shape, a corrugated plate shape, a cylindrical shape, a spherical shape, and a character shape can be adopted. From the viewpoint of volatility, the shape of the volatilization body of the present invention is preferably a bar or a corrugated bar. For example, it can be a corrugated bar as shown in FIG.

When the volatile material of the present invention is rod-shaped, corrugated rod-shaped, column-shaped, corrugated column-shaped, plate-shaped, corrugated plate-shaped, particularly elongated rod-shaped or elongated corrugated rod-shaped, the above-mentioned particle size width is 0.2 mm to 1 mm. When the cork material is used, the volatilization body tends to bend during volatilization, but if the proportion of particles with a large cross-sectional area measured by the above method is large, such deformation can be suppressed, which is preferable. For example, if the ratio of the number of cork material regions having an area of more than 1.0 mm ² is 18% or more (the ratio of the number of cork material regions having an area of 1.0 mm ² or less is 82% or less), It is preferable because the deformation of the volatilization body can be suppressed. In addition, when the content of the binder is small, the volatilized body tends to bend easily, but by setting the content of the binder to 10 to 50 parts by weight, such deformation can be suppressed, which is preferable.

The volatilization material of the present invention may contain components other than the cork material and the binder as long as volatilization of the volatile chemical is not hindered. Such other components include, for example, colorants, oil repellents, disinfectants, deodorants, etc. At least one selected from these groups can be used.
The content of other components is preferably, for example, 0.00001 to 10 parts by weight with respect to 100 parts by weight of the cork material.

[Volatile agent]
The volatile chemical that is volatilized by the volatile substance of the present invention is not particularly limited as long as it is a liquid chemical that is volatile at least at room temperature or a chemical that becomes liquid when dissolved in a solvent.
Volatile agents include, for example, perfumes, solvents, deodorants, bactericides, disinfectants, antibacterial agents, antifungal agents, pest repellents, pest control agents, etc. At least One type can be used.
As the volatile chemical, one having high lipophilicity is preferable. For example, it is preferable to use a chemical having a partition coefficient (logP) of preferably 0 or more, more preferably 2 or more, and still more preferably 4 or more.
Here, LogP is a measure of the distribution of substances between the octanol phase and the aqueous phase. Specifically, it is obtained by decomposing the chemical structure of the compound into its structural elements and integrating the hydrophobic fragment constants (f values) of each fragment. LogP can be calculated, for example, using the MedChem 1.01 software program. The MedChem software program is a software program developed by the Medicinal Chemistry Project, Pomona College, Pomona California.

Examples of perfumes include natural perfumes extracted from various plants and animals, synthetic perfumes chemically synthesized, and compounded perfumes made by mixing many of these perfume ingredients.

Examples of natural fragrances include natural essential oils such as peppermint oil, orange oil, lemon oil, lavender oil, lavandin oil, bergamot oil, patchouli oil, cedarwood oil, and peppermint oil.
Synthetic fragrances include hydrocarbon terpenes such as α-pinene, β-pinene, limonene, p-cymene, terpinolene, α-terpinene, γ-terpinene, α-phellandrene, myrcene, camphene, and ocimene; heptanal, octanal , decanal, benzaldehyde, salicylic aldehyde, phenylacetaldehyde, citronellal, hydroxycitronellal, hydrotropic aldehyde, ligustral, citral, α-hexylcinnamic aldehyde, α-amylcinnamic aldehyde, lyrial, cyclamenaldehyde, lyral, heliotropine , anisaldehyde, helional, vanillin, ethyl vanillin and other aldehydes; ethyl formate, methyl acetate, ethyl acetate, methyl propionate, methyl isobutyrate, ethyl isobutyrate, ethyl butyrate, propyl butyrate, isobutyl acetate , isobutyl isobutyrate, isobutyl butyrate, isobutyl isovalerate, ethyl-2-methyl valerate, isoamyl acetate, terpinyl acetate, isoamyl propionate, amyl propionate, amyl isobutyrate, amyl butyrate, amyl isovalerate, allyl hexanoate, ethyl acetoacetate, ethyl heptylate, heptyl acetate, methyl benzoate, ethyl benzoate, ethyl octylate, styraryl acetate, benzyl acetate, nonyl acetate, bornyl acetate, linalyl acetate, ortho -tert-butyl cyclohexyl acetate, linalyl benzoate, benzyl benzoate, triethyl citrate, ethyl cinnamate, methyl salicylate, hexyl salicylate, hexyl acetate, hexyl butyrate, menthyl acetate, terpinyl acetate, anisyl acetate, phenyl ethyl iso Esters and lactones such as butyrate, methyl jasmonate, methyl dihydrojasmonate, ethylene brassylate, γ-undecalactone, γ-nonyllactone, cyclopentadecanolide, coumarin; anisole, p-cresyl methyl ether, Ethers such as dimethylhydroquinone, methyl eugenol, β-naphthol methyl ether, β-naphthol ethyl ether, anethole, diphenyl oxide, rose oxide, galaxolide, ambrox; isopropyl alcohol, cis-3-hexenol, heptanol, 2-octanol, Alcohols such as dimetol, dihydromyrcenol, linalool, benzyl alcohol, citronellol, geraniol, nerol, terpineol, tetrahydrogeraniol, l-menthol, cedrol, santalol, thymol, anise alcohol, phenylethyl alcohol, hexanol; diacetyl, Menthone, isomenthone, thiomenthone, acetophenone, α- or β-damascone, α- or β-damascenone, α-, β- or γ-ionone, α-, β- or γ-methylionone, methyl-β-naphthyl ketone, benzophenone , tentalome, acetylcedrene, α- or β-isomethylionone, α-, β- or γ-ylone, maltol, ethyl maltol, cis-jasmone, dihydrojasmone, l-carvone, dihydrocarvone, ketones such as methyl amyl ketone , camphor, 1,8-cineole, allyl amyl glycolate, isopulegol, allylcaproate and the like.
These perfumes may be used singly or in any combination of two or more to be used as a blended perfume.

In addition, the natural essential oil mentioned as an example of the perfume may be used as a deodorant, an antibacterial agent, an insect repellent and/or an insect control agent, which will be described later.

Examples of solvents include alcohols such as ethanol, 1-propanol and 2-propanol, polyhydric alcohols such as ethylene glycol, diethylene glycol, dipropylene glycol, butylene glycol, glycerin and 1,3-butanediol, and ethylene glycol monomethyl ether. , ethylene glycol dimethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, diethylene glycol monomethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoethyl ether, diethylene glycol diethyl ether, diethylene glycol monopropyl ether, diethylene glycol mono Butyl ether, diethylene glycol monoisobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol dimethyl ether, dipropylene glycol monomethyl ether (dipropylene glycol methyl ether), tripropylene glycol monomethyl ether, tripropylene glycol monobutyl ether, propylene glycol mono Glycol ethers such as propyl ether, dipropylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, propylene glycol propyl ether, polyoxyethylene fatty acid esters, diethyl Esters such as phthalate, benzyl benzoate, triethyl citrate, and isopropyl myristate, paraffins such as liquid paraffin, n-paraffin and isoparaffin, other aliphatic hydrocarbons such as hexane, kerosene and petroleum benzine, urea compounds, etc. mentioned. Among them, paraffins such as liquid paraffin, n-paraffin and isoparaffin are preferable as the solvent.

Examples of deodorants include plant extracts (e.g., extracts obtained from camellia, rose, chrysanthemum, pine, cedar, plantain, etc.), plant essential oils (e.g., tea extracts, catechins, plant polyphenols, linalool, menthol, borneol) and the like, and known deodorants can be used.

Examples of bactericidal agents, disinfectants, antibacterial agents, and antifungal agents include glutaraldehyde, phenol, cresol, phenoxyethanol, isopropylmethylphenol (IPMP), thymol, o-phenylphenol (OPP), 4-chloro-3, 5-dimethylphenol (PCMX), thiabendazole (TBZ), chlorothalonil (TPN), triclosan, etc., and known bactericidal agents, antibacterial agents, disinfectants and antifungal agents can be used.

Pest repellents include DEET, di-n-butylsuccinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icaridin (picaridin), 3-(Nn-butyl-N-acetyl). Aminopropionic acid ethyl ester, p-menthane-3,8-diol and the like can be mentioned, and known pest repellents can be used.

Pest control agents include, for example, pyrethrin, prallethrin, etofenprox, imiprothrin, phenothrin, allethrin, phthalthrin, resmethrin, flamethrin, permethrin, empentrin, cyphenothrin, transfluthrin, metofluthrin, profluthrin, monfluorothrin, dimefluthrin, and the like. Pyrethroid compounds, organophosphorus compounds such as fenitrothion, dichlorvos, chlorpyrifosmethyl, diazinon and fenthion, carbamate compounds such as carbaryl and propoxur, insecticidal compounds such as methoprene, pyriproxyfen, methoxadiazon, fipronil and amidoflumet, and other allyl isoforms Thiocyanate, paradichlorobenzene, naphthalene, camphor, etc., and known pest control agents can be used.

These agents may be used singly or in combination of two or more. Combinations of drugs are also optional, such as containing a combination of drugs with different actions, for example, a perfume and a solvent. For example, when a perfume and a solvent are contained in combination, the perfume can be 0.01 to 25 parts by weight and the solvent can be 75 to 99.99 parts by weight. When the pest repellent and the solvent are contained in combination, the pest repellent can be 0.01 to 15 parts by weight and the solvent can be 85 to 99.99 parts by weight. The repellent may be 0.01 to 1 part by weight, and the solvent may be 99 to 99.99 parts by weight.

As described above, the volatilization body of the present invention does not have problems such as a large decrease in the volatilization amount of the volatile chemical until the end of volatilization or stop volatilization, and stable volatilization is possible until the end. The desired effect of the drug can be obtained over the period of use, such as an aromatic effect in the case of a drug, an insect repellent effect in the case of an insect repellent, and a bactericidal effect in the case of a fungicide.

[Chemical volatilizer]
The chemical volatilizer of the present invention includes the volatilization body and the volatile chemical, and is arranged so that at least part of the volatilization body is in contact with the volatile chemical.
Examples and preferred aspects of the volatile material and the volatile chemical used in the chemical volatilizer of the present invention are as described above.

The chemical volatilizer of the present invention may further include a container. The container that can be used for the chemical volatilizer of the present invention is not particularly limited as long as it can accommodate at least a volatile chemical and the volatile chemical can come into contact with the above-described volatilization body.

The shape of the container that may be included in the chemical volatilizer of the present invention, as described above, is such that at least the volatile chemical can be accommodated and the volatile chemical can come into contact with the above-described volatile substance. It is not particularly limited as long as it is a substance. Examples of the shape of the container include a container having an opening, and more specific examples include a dish-like shape, a bottle-like shape having an opening, a pouch-like shape having an opening, and the like.

The material of the container that may be included in the chemical volatilizer of the present invention is also not particularly limited. Examples of materials for the container include plastics, glass, pottery, and metals.
As one aspect of the chemical volatilizer of the present invention, for example, a container having an opening at the top, the above-described volatilizing body inserted into the container so that the tip protrudes from the opening, and the volatilizer contained in the container Examples include those containing the above-mentioned volatile chemicals. A drug volatilizer having such an aspect, in which the volatilizer of the present invention is replaced with a conventional volatilizer, is generally known as, for example, a perfume diffuser.

The chemical volatilizer of the present invention may be in a mode that does not include a container. Examples of the container-free chemical volatilizer include a chemical volatilizer in which a volatilizing body is inserted into a porous body (such as a sponge) containing a volatile chemical.

EXAMPLES The present invention will be specifically described below with reference to Examples, but the present invention is not limited to these.

[Examples 1 to 4, Comparative Examples 1 to 5]
(Production of volatilized bodies of Examples 1 to 3)
100 parts by weight of the cork material B and 20 parts by weight of the urethane resin A were placed in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method (temperature: 140 to 150° C., pressure: 8 tons), cut into a plate shape and punched out to obtain a volatilized body of Example 1. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.
In addition, including the examples and comparative examples described later, the density of the volatilized material was obtained by measuring the weight, obtaining the volume from the dimensions, and obtaining the weight/volume.

Volatilized bodies of Examples 2 and 3 were obtained in the same manner as in Example 1, except that the binder was changed to that shown in Table 1. Each of the volatilization bodies obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 4)
A ribbon mixer was charged with 100 parts by weight of cork material B and 49 parts by weight of epoxy resin and stirred. The resulting mixture was molded by a compression molding method without heating, cut into plates, and punched to obtain a volatilized body of Example 4. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.260 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Comparative Example 1)
100 parts by weight of cork material A and 25 parts by weight of phenolic resin were placed in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method, cut into a plate shape, and punched to obtain a volatilized body of Comparative Example 1. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.490 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Comparative Example 2)
100 parts by weight of cork material B and 307 parts by weight of rubber A were placed in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method, cut into a plate shape, and punched to obtain a volatilized body of Comparative Example 2. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.510 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Comparative Example 3)
100 parts by weight of cork material A and 153 parts by weight of rubber B were placed in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method, cut into a plate shape, and punched to obtain a volatilized body of Comparative Example 3. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.890 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Comparative Example 4)
100 parts by weight of cork material C and 548 parts by weight of rubber C were loaded in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method, cut into a plate shape, and punched to obtain a volatilized body of Comparative Example 4. The volatilization body obtained had a rectangular parallelepiped shape, a density of 1.04 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Comparative Example 5)
100 parts by weight of cork material A and 333 parts by weight of polyethylene resin were charged into a ribbon mixer and stirred. The resulting mixture was molded by a calender roll molding method and punched to obtain a volatilized body of Comparative Example 5. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.710 g/cm ³ and dimensions of 1.0 mm×5.5 mm×200 mm.

The details of the cork materials and binders used in the production of the volatile bodies of Examples and Comparative Examples are as follows.

・Cork material A: Cork material obtained by peeling and pulverizing the bark of cork oak (particle size width 0.2 to 1.0 mm)
・Cork material B: Cork material obtained by peeling and pulverizing the bark of cork oak (particle size width 0.3 to 2.0 mm)
・Cork material C: Cork material obtained by peeling and pulverizing the bark of cork oak (grain size width 1.0 to 2.5 mm)
・Cork material D: Cork material obtained by peeling and pulverizing the bark of cork oak (grain size width 1.0 to 4.0 mm)
・Cork material E: Cork material obtained by peeling and pulverizing the bark of cork oak (particle size width 0.3 to 2.5 mm)
・Cork material F: Cork material obtained by peeling and pulverizing the bark of cork oak (particle size width: 2.4 to 4.0 mm)
・Cork material G: Cork material obtained by removing the bark of cork oak and pulverizing it (particle size width 4.0 to 5.6 mm)
・Cork material H: Cork material obtained by peeling and pulverizing the bark of cork oak (particle size width: 5.6 to 10.0 mm)

The particle size range of each cork material was obtained by putting the cork material into a shaker set with sieves having openings each having the upper and lower limits of the particle size, shaking for 15 minutes, and sieving. It was confirmed by checking that the amount of cork material that came off was 5% by weight or less.

・Urethane resin A: Ether-based urethane resin (main component: polymethylene polyphenyl polyisocyanate), specific gravity 1.07 (20°C), viscosity 50-150 mPa s (20°C)
・ Urethane resin B: Ether-based urethane resin (main component: polymethylene polyphenyl polyisocyanate), viscosity 1862 mPa s (25 ° C)
・ Urethane resin C: ester-based urethane resin (main component: polymethylene polyphenyl polyisocyanate), specific gravity 1.21, viscosity 5300 mPa s (25 ° C)
- Epoxy resin: reaction product of bisphenol A liquid epoxy resin and modified alicyclic amine

・Phenolic resin: Formaldehyde as the main component, specific gravity 0.48 (25 ° C)
・Polyethylene resin: A mixture of 50% by weight of polyethylene and 50% by weight of polybutadiene elastomer ・Rubber A: A rubber material containing nitrile rubber as a main component and calcium carbonate (filler) ・Rubber B: A nitrile rubber as a main component, Rubber material containing calcium carbonate (filler) and foaming agent ・Rubber C: Rubber material containing carbon (filler) with nitrile rubber as the main component

(Measurement of oil absorption per unit volume)
The volatilization material of Example 1 was cut into a size of 5.0 mm×5.5 mm×100 mm to obtain a test piece. Three test pieces were loaded into a test tube of φ27 mm×250 mm. 30 mL of a solvent (IP Solvent 2028: isoparaffin-based solvent manufactured by Idemitsu Kosan Co., Ltd.) was added to the test tube, and the test piece was immersed at a temperature of 25° C. for 48 hours. If the test piece floated, it was pressed with aluminum foil so that the test piece was completely immersed in the solvent. Remove the test piece after immersion for 48 hours with tweezers, fix the test piece with tweezers in a vertical position, and confirm that the solvent adhering to the surface has stopped dripping for 5 minutes. It was measured. Then, the oil absorption per unit volume was determined by the following formula. Table 1 shows the results.
Oil absorption per unit volume [mg/cm ³ ] = (weight of volatile material after immersion [mg] - weight of volatile material before immersion [mg]) / volume of volatile material [cm ³ ]
As the oil absorption per unit volume, the average value of the oil absorption obtained for three test pieces was adopted.

Similar tests were conducted on the volatilized bodies of Examples 2 to 4 and Comparative Examples 1 to 5, and the oil absorption per unit volume of each was determined. The volatilization body of Comparative Example 5 was tested in the same manner as the volatilization body of Example 1, except that the volatilization body cut into a size of 1.0 mm x 5.5 mm x 100 mm was used. Table 1 shows the results.

(Volatilization performance test)
Two volatile substances of Example 1 were placed in a glass bottle filled with 20 g of aromatic liquid as a volatile chemical, and allowed to stand at 30° C. for 72 hours and an additional 72 hours for a total of 144 hours. The difference between the weight of the aromatic liquid after standing for 72 hours and the weight of the aromatic liquid at the start of the test (20 g) is determined as the volatilization amount (g) for 0 to 72 hours, and the weight of the aromatic liquid after standing for 144 hours. The difference from the weight of the aromatic liquid after standing for 72 hours was determined as the volatilization amount (g) for 72 to 144 hours. Table 1 shows the results.
The formulation of the aromatic liquid used is as follows.
・ Floral fragrance (manufactured by Takasago International Corporation): 10% by weight
・ IP Clean LX (isoparaffin-based solvent manufactured by Idemitsu Kosan Co., Ltd.): 75% by weight
・ IP Solvent 2028 (isoparaffinic solvent manufactured by Idemitsu Kosan Co., Ltd.): 15% by weight

The same test was performed on the volatilized bodies of Examples 2 to 4 and Comparative Examples 1 to 4 to determine the volatilization amount of each. In addition, for the volatilization body of Comparative Example 5, five volatilization bodies cut to dimensions of 1.0 mm × 5.5 mm × 100 mm were stacked, and the dimensions were 5.0 mm × 5.5 mm × 100 mm. was tested to determine the volatilization amount. Table 1 shows the results.

(sensory evaluation)
Two volatile substances of Example 1 were placed in a glass bottle filled with 20 g of an aromatic liquid as a volatile chemical, and allowed to stand at 25° C. for 48 hours. It was then transferred to a 2.9 m ³ (95 cm x 140 cm x 220 cm) space at 25°C with 0.4 air changes per hour.
The formulation of the aromatic liquid used was the same as that used in the volatilization performance test.

The scent intensity after standing for 1 hour was evaluated according to the following 5-grade evaluation (N=10 to 15). Then, the average score of fragrance intensity was used as the result of the sensory evaluation. Table 1 shows the results.
・ Fragrance intensity 5: Strong 4: Slightly strong 3: Normal 2: Slightly weak 1: Weak

Similar tests were conducted on the vaporized substances of Examples 2 to 4 and Comparative Examples 1 to 4, and sensory evaluation results were obtained for each. In addition, for the volatilization body of Comparative Example 5, five volatilization bodies cut to dimensions of 1.0 mm × 5.5 mm × 100 mm were stacked, and the dimensions were 5.0 mm × 5.5 mm × 100 mm. were tested, and the results of the sensory evaluation were obtained. Table 1 shows the results.

From the above results, it was found that the volatilized material having an oil absorption per unit volume of 80 mg/cm ³ or more has a good volatilization amount and is stable over a long period of time, and the sensory evaluation results are also good (Example 1 ~4). On the other hand, volatilized materials having an oil absorption per unit volume of less than 80 mg/cm ³ showed a small volatilization amount and poor sensory evaluation results (Comparative Examples 1 to 5).

[Examples 5 to 8]
(Production of volatilized body of Example 5)
100 parts by weight of the cork material A and 15 parts by weight of the urethane resin B were placed in a ribbon mixer and stirred. The resulting mixture was molded by a compression molding method (temperature: 140 to 150° C., pressure: 8 tons), cut into plates and punched out to obtain a volatilized body of Example 5. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 6)
A volatilized body of Example 6 was obtained in the same manner as in Example 5, except that cork material B was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 7)
A volatilized body of Example 7 was obtained in the same manner as in Example 5, except that cork material C was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 8)
A volatilized body of Example 8 was obtained in the same manner as in Example 5, except that cork material D was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Measurement of oil absorption per unit volume and volatilization performance test)
For the volatilized bodies of Examples 5 to 8, the oil absorption and volatilization amount per unit volume (0 to 72 hours , 72-144 hours) were determined. Table 2 shows the results.

(sensory evaluation)
In a glass bottle filled with 20 g of aromatic liquid as a volatile chemical, two volatile bodies of Example 5 adjusted to dimensions of 5.0 mm × 5.5 mm × 190 mm were placed and allowed to stand at 30°C for 6 hours or 125 hours. It was then transferred to a 2.9 m ³ (95 cm x 140 cm x 220 cm) space at 25°C with 0.4 air changes per hour. Here, 6 hours and 125 hours adopted as the stationary time are the times corresponding to 0 to 72 hours and 72 to 144 hours, respectively, which are the measurement times of the amount of volatilization. Equivalent to.
The formulation of the aromatic liquid used was the same as that used in the volatilization performance tests in Examples 1-4 and Comparative Examples 1-5.

The scent intensity after standing for 1 hour was evaluated according to the following 5-grade evaluation (N=10 to 15). Then, the average score of fragrance intensity was used as the result of the sensory evaluation. Table 2 shows the results.
・ Fragrance intensity 5: Strong 4: Slightly strong 3: Normal 2: Slightly weak 1: Weak

Similar tests were conducted on the volatilized bodies of Examples 6 to 8 adjusted to dimensions of 5.0 mm x 5.5 mm x 190 mm, and sensory evaluation results were obtained for each. Table 2 shows the results.

From the above results, it was found that the oil absorption per unit volume of the volatilized material can be adjusted by changing the grain size width of the cork material. Similarly, in the volatilized material obtained in this way, when the oil absorption per unit volume is 80 mg/cm ³ or more, a good and stable volatilization amount can be obtained over a long period of time, and the results of the sensory test are also good. There was (Examples 5-8).
Further, when the grain size width of the cork material in the state (raw material stage) before being mixed with a binder and molded preferably includes a range of less than 4.0 mm (Examples 5 to 8), more preferably 2. When it included a range of less than 0 mm (Examples 5-8), and more preferably when it included a range of less than 1.0 mm (Examples 5-6), it tended to show good volatility.

[Examples 9 to 12]
(Production of volatilized body of Example 9)
A volatilized body of Example 9 was obtained in the same manner as in Example 5, except that cork material E was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 10)
A volatilized body of Example 10 was obtained in the same manner as in Example 5, except that cork material F was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 11)
A volatilized body of Example 11 was obtained in the same manner as in Example 5, except that cork material G was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Production of volatilized body of Example 12)
A volatilized body of Example 12 was obtained in the same manner as in Example 5, except that cork material H was used instead of cork material A. The volatilization body obtained had a rectangular parallelepiped shape, a density of 0.182 g/cm ³ and dimensions of 5.0 mm×5.5 mm×200 mm.

(Measurement of oil absorption per unit volume)
For the volatilized bodies of Examples 9-12, the oil absorption per unit volume was determined in the same manner as for the volatilized bodies of Examples 1-4 and Comparative Examples 1-4. Table 3 shows the results.

(Volatilization performance test and sensory evaluation)
In a glass bottle filled with 70 ml of aromatic liquid as a volatile chemical, five volatile bodies of Example 9 adjusted to dimensions of 5.0 mm × 5.5 mm × 190 mm were placed, and at 30 ° C., the residual amount of the chemical solution was 100% to about 80%. % is defined as the volatilization amount (initial), and the volatilization amount per day from about 35% to about 15% is defined as the volatilization amount (final stage), The initial and final volatilization rates were measured. Table 3 shows the results.
The formulation of the aromatic liquid used is as follows.
・ Floral fragrance (manufactured by Takasago International Corporation): 10% by weight
・ IP1620 (isoparaffin solvent manufactured by Idemitsu Kosan Co., Ltd.): 40% by weight
・ Isopar L (isoparaffin-based solvent manufactured by Exxon Mobil): 35% by weight
・ Isopar M (isoparaffinic solvent manufactured by Exxon Mobil): 15% by weight

Volatilization body (initial) in which the aromatic liquid is volatilized until the remaining amount of the chemical liquid reaches about 90% under the same conditions as the above volatilization performance test, and the remaining chemical liquid under the same conditions as the above volatilization performance test Volatilized bodies (final stage) in which the aromatic liquid was volatilized until the amount was about 35%, respectively, at 25 ° C., 2.9 m ³ (95 cm × 140 cm × 220 cm) ventilated 0.4 times per hour moved into space. The scent intensity after standing for 1 hour was evaluated according to the following 5-grade evaluation (N=10 to 15). Then, the average score of fragrance intensity was used as the result of the sensory evaluation. Table 3 shows the results.
・ Fragrance intensity 5: Strong 4: Slightly strong 3: Normal 2: Slightly weak 1: Weak

Similar tests were conducted on the volatilized materials of Examples 10 to 12, and the results of measurement of oil absorption per unit volume, volatilization performance test, and sensory evaluation were obtained. In the measurement of the oil absorption, the volatilization body was adjusted to a size of 5.0 mm x 5.5 mm x 100 mm. I adjusted. Table 3 shows the results.

From the above results, it was found that the oil absorption per unit volume of the volatilized material can be adjusted by changing the grain size width of the cork material. Similarly, in the volatilized material obtained in this way, when the oil absorption per unit volume was 80 mg/cm ³ or more, a good and stable volatilization amount was obtained over a long period of time, and the sensory evaluation was also good. (Examples 9-12).
Further, when the grain size width of the cork material in the state (raw material stage) before being mixed with a binder and molded preferably includes a range of less than 4.0 mm (Examples 9 to 10), more preferably 2. When it included a range of less than 0 mm (Example 9), more preferably when it included a range of less than 1.0 mm (Example 9), it tended to show good volatility and sensory evaluation.

[Examples 13 to 17]
(Measurement of number ratio of areas of cork material having an area of 1.0 mm ² or less)
Regarding the volatilization material used in Example 5, the ratio of the number of areas of the cork material having an area of 1.0 mm ² or less was obtained by the following procedure (Example 13). Table 4 shows the results.

(1) On the 5.5 mm × 200 mm surface of the volatilization body, for each of the three positions of 50 mm, 100 mm and 150 mm from the end in the long side direction, the dye solution (manufactured by Orient Chemical Industry Co., Ltd., IP OIL BLUE 2N 3 drops (about 0.2 mL) of a saturated solution dissolved in Solvent 2028) was added dropwise with a pipette to color the cork material on the surface of the volatilized body. The following measurements were performed on each of the three colored spots, and the average of the results obtained was taken as the final result.
(2) The colored portion was magnified 20 times using a microscope (VHX-7000 manufactured by Keyence Corporation) to obtain a microscope image (observation range: about 5.5 mm x about 15 mm).
(3) The microscopic image obtained was printed on A4 paper, the boundary of the cork material was traced with a pen, and the gap was filled in, and the area of each cork material on the surface of the volatile material was determined by capturing with a scanner.
(4) The image in which the area of each cork material was determined was imported into an illustrator (manufactured by Adobe), and the area of each cork material area on the surface of the cork material was measured.
(5) The ratio of the number of ^cork material regions having an area of 1.0 mm ² or less to the total number of cork material regions existing in the entire measurement part It was obtained as a percentage of the number.

Measurements were performed in the same manner as in Example 13, except that the volatilizers used in Examples 6, 4, 8, and 10 were used instead of the volatilizers used in Example 5 ( Examples 14-17). Table 4 shows the results.

From the above results, it was found that the ratio of the number of areas of the cork material having an area of 1.0 mm ² or less can be adjusted by changing the grain size width of the cork material and the type of binder. The volatilized body thus obtained had an oil absorption per unit volume of 80 mg/cm ³ or more, a good and stable volatilization amount over a long period of time, and a good sensory evaluation. , the ratio of the number of areas of cork material having an area of 1.0 mm ² or less was 20% or more (Examples 13 to 17).

Claims (2)

A volatilization body for volatilizing a volatile agent,
comprising a cork material and a binder;
When immersed in an isoparaffinic solvent having a carbon number of 10 to 16 and a vapor pressure of 0.05 kPa or less (20°C) at a temperature of 25°C for 48 hours, the oil absorption per unit volume determined by the following formula is 80 mg/cm ^{3 .} The volatilization body which is above.
Oil absorption per unit volume [mg/cm ³ ] = (weight of volatile material after immersion [mg] - weight of volatile material before immersion [mg]) / volume of volatile material [cm ³ ] A chemical volatilizer comprising the volatilizable body of claim 1 and a volatile chemical, wherein at least a portion of the volatilizable body is arranged to contact the volatile chemical.

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