JP7664892B2 - Fixed-volume aerosol product and deodorizing method - Google Patents

Description

The present invention relates to a metered-dose aerosol product and a deodorizing method. More specifically, the present invention relates to a metered-dose aerosol product and a deodorizing method that can simultaneously deodorize a toilet space and a floor surface.

Various methods for deodorizing toilet spaces have been studied. Patent Document 1 proposes a toilet deodorizer that reduces the number of particles in the toilet that are 100 μm or larger to 50% or less.

JP 2003-235949 A

However, bad odors in the toilet space come not only from malodorous substances present in the space, but also from the floor, walls, etc. The technology described in Patent Document 1 aims to deodorize the toilet space, but is not sufficient in terms of deodorizing the floor, etc. Furthermore, the technology described in Patent Document 1 is a spray, and if too much is used, it can cause an unpleasant irritating sensation to the user.

The present invention was made in consideration of these conventional problems, and aims to provide a constant-dose aerosol product and deodorizing method that can achieve sufficient deodorizing effect not only on the air space of the toilet, but also on floor surfaces, etc., with a small amount of use.

After extensive research, the inventors discovered that by spraying a fixed amount of an aerosol composition containing a specific amount of deodorizing ingredients to achieve a specific spray particle diameter, the sprayed aerosol composition exerts an excellent deodorizing effect not only on the toilet space, but also on malodorous substances on the floor surface, and thus completed the present invention. In other words, the fixed-amount spray aerosol product and deodorizing method of the present invention, which solve the above problems, mainly include the following configurations.

(1) A metered-dose aerosol product that includes an aerosol composition containing a concentrate containing a toilet deodorizing component and a propellant, the mixture ratio (volume ratio) of the concentrate to the propellant is 20/80 to 80/20, the deodorizing component is contained in the aerosol composition at 0.5 w/v % or more, and the amount of each spray is 0.2 to 0.4 mL.

(2) The constant-dose aerosol product according to (1), wherein the volume-average particle diameter (D _A ) of the sprayed particles at a position 15 cm away from the nozzle is 17 to 86 μm.

(3) A metered dose aerosol product according to (1) or (2), in which the aerodynamic diameter, that is, the falling particle diameter (D _B ), as measured by an Andersen sampler placed 50 cm horizontally away and 70 cm below the nozzle, is 2.50 to 8.00 μm.

(4) A method of deodorizing using a constant-dose aerosol product, which sprays an aerosol composition containing a concentrate containing 0.5 w/v % or more of a toilet deodorizing component in the aerosol composition, and a propellant in a blending ratio (volume ratio) of the concentrate to the propellant of 20/80 to 80/20, in an amount of 0.2 to 0.4 mL per spray.

The present invention provides a constant-dose aerosol product and deodorizing method that can achieve sufficient deodorizing effects not only on the air space of a toilet, but also on floor surfaces and the like, with only a small amount of use.

<Fixed-volume aerosol product>
The metered-dose aerosol product (hereinafter, simply referred to as the aerosol product) of one embodiment of the present invention includes an aerosol composition containing a concentrate containing a toilet deodorant component and a propellant. The blending ratio (volume ratio) of the concentrate and the propellant is 20/80 to 80/20. The deodorant component is contained in the aerosol composition at 0.5 mass/volume (w/v)% or more. The aerosol product has a spray amount of 0.2 to 0.4 mL per spray. Each configuration will be described below. The aerosol product of this embodiment is characterized in that the blending ratio of the concentrate and the propellant, the spray amount of the aerosol composition per spray, and the volume average particle diameter (D _A ) of the sprayed particles are adjusted to be within the above-mentioned specific ranges. Therefore, other configurations (for example, the shape of the aerosol product, the type of the deodorant component, various physical properties such as the internal pressure of the container, etc.) may be any as long as they satisfy the above-mentioned ranges, and are not particularly limited. Therefore, the detailed description below is merely illustrative except for the essential features of the present embodiment.

The aerosol product of this embodiment is used in a toilet space. In this embodiment, the toilet space refers to a private or semi-private space with a volume of about 2 to 6 ^m3 . Such toilet spaces include toilet spaces in ordinary homes with one toilet bowl, as well as each semi-private space in a public space where multiple semi-private spaces are lined up. In addition, the aerosol product of this embodiment can achieve its purpose by spraying multiple times in a space larger than the above.

(undiluted solution)
The concentrate contains a toilet deodorizing component (hereinafter, also simply referred to as a deodorizing component). The deodorizing component is not particularly limited. For example, the deodorizing component is an inorganic salt. The metal ions constituting the inorganic salt are preferably heavy metal ions, and zinc ions, copper ions, iron ions, silver ions, manganese ions, cobalt ions, nickel ions, and the like are more preferable. The anions that are counter ions of these metal ions are not particularly limited. For example, the anions are sulfate ions, chloride ions, oxide ions, acetate ions, nitrate ions, and the like. More specifically, the deodorizing component is a silver compound such as silver nitrate, silver sulfate, silver chloride, silver oxide, and silver acetate; a zinc compound such as zinc chloride, zinc sulfate, zinc oxide, and zinc acetate; a copper compound such as copper chloride (I), copper chloride (II), and copper sulfate (II); an iron compound such as iron chloride (II), iron chloride (III), iron sulfate (II), and iron sulfate (III); and a nickel compound such as nickel chloride and nickel sulfate.

The deodorizing component may be a natural plant extract or plant essential oil, a synthetic organic acid and its metal salt, or a deodorizing compound. Natural plant extracts include catechin, tannin, flavonoid, polyphenol, etc. Among these, the plant extract is preferably a tea extract, a persimmon extract, an alder plant extract, a Theaceae plant extract, etc. The deodorizing component may be bay essential oil, sage essential oil, thyme essential oil, ginger essential oil, peppermint essential oil, geranium essential oil, nutmeg essential oil, etc., which have good decomposition properties for various malodorous components. The deodorizing component may be chlorophyll and its derivatives, etc. Furthermore, the synthetic deodorizing component may be an amino acid, a polyvalent carboxylic acid, an organic acid, a fatty acid aldehyde having 2 to 4 carbon atoms, glyoxal, glutaraldehyde, trimethylglycine, an acrylic acid derivative, a glycol, etc. The surfactant may be a nonionic or amphoteric surfactant. Furthermore, powders such as silicon dioxide and its metal salts may be used. Deodorizing ingredients may be used in combination.

The malodorous substances that the deodorizing component targets may be any malodorous substances that are primarily generated in toilet spaces. Examples of malodorous substances include hydrogen sulfide, methanethiol, ammonia, etc.

The content of the deodorizing component in the aerosol composition may be 0.5 w/v% or more, and preferably 1.0 w/v% or more. The content of the deodorizing component is appropriately adjusted depending on the type and concentration of the malodorous substance to be deodorized. For example, when the main malodorous substance is hydrogen sulfide at a concentration of 0.06 ppm, the content of the deodorizing component in the aerosol composition of 0.5 w/v% can sufficiently exert a deodorizing effect on the toilet space and floor surface. There is no particular upper limit to the content of the deodorizing component. Depending on the type of deodorizing component, stickiness may occur at high concentrations. Therefore, the content of the deodorizing component in the aerosol composition is preferably 50 w/v% or less, and more preferably 20 w/v% or less. By having the content of the deodorizing component within the above range, the aerosol product can exert a sufficient deodorizing effect not only in the space of the toilet space but also on the floor surface, etc.

The content of the deodorizing component in the concentrate is preferably 1.0 w/v% or more, and more preferably 2.0 w/v% or more. The content of the deodorizing component in the concentrate is preferably 100% by mass or less, and more preferably 80 w/v% or less. By having the content of the deodorizing component within the above range, the aerosol product can exert a sufficient deodorizing effect not only in the space of the toilet, but also on floor surfaces, etc.

The concentrate may contain a solvent as appropriate in addition to the deodorizing component. The solvent may be included to dissolve the deodorizing component appropriately, making it easier to mix with the propellant in the aerosol container, or to assist in the diffusion of the deodorizing component in the toilet space.

The solvent is not particularly limited. Examples of the solvent include ethanol, isopropyl alcohol (IPA), propylene glycol monomethyl ether, isopropyl myristate (IPM), propylene glycol, water, etc. Among these, ethanol and IPA are preferable because they easily dissolve volatile compounds, are inexpensive, and are easy to handle.

When a solvent is included, the content of the solvent in the undiluted solution is preferably more than 0 w/v%, and more preferably 10 w/v% or more. On the other hand, the content of the solvent in the undiluted solution is preferably 99 w/v% or less, and more preferably 90 w/v% or less. If the solvent content exceeds 99 w/v%, the aerosol product will contain less deodorant ingredients, and the effect of adding the deodorant ingredients may not be fully achieved.

In addition to the above-mentioned deodorant components and solvents, the concentrate may contain optional components. For example, optional components include nonionic, anionic or cationic surfactants and various fragrances.

The fragrance is not particularly limited. Examples of the fragrance include aldehydes C6 to C12, anisaldehyde, acetal R, acetophenone, acetyl cedrene, adoxal, allyl amyl glycolate, allyl cyclohexane propionate, α-damascone, β-damascone, δ-damascone, ambroxan, amyl cinnamic aldehyde, amyl cinnamic aldehyde dimethyl acetal, amyl valerianate, amyl salicylate, isoamyl acetone, and the like. tate, isoamyl salicylate, aurantiol, acetyl eugenol, bacdanol, benzyl acetate, benzyl alcohol, benzyl salicylate, bergamyl acetate, bornyl acetate, butyl butyrate, p-t-butyl cyclohexanol, p-t-butyl cyclohexyl acetate, o-t-butyl cyclohexanol, o-t-butyl cyclohexyl acetate, benzaldehyde, benzyl formate Mate, caryophyllene, cashmeran, carvone, cedroamber, cedryl acetate, cedrol, celestride, cinnamic alcohol, cinnamic aldehyde, cis-jasmone, citral, citral dimethyl acetal, citrasal, citronellal, citronellol, citronellyl acetate, citronellyl formate, citronellyl nitrile, cyclacet, cyclamen aldehyde, cyclaprop, Carone, Coumarin, Cinnamyl Acetate, δ-C6 to C13 Lactone, Dimethylbenzyl Carbinol, Dihydrojasmone, Dihydrolinalool, Dihydromyrcenol, Dimetol, Dimyrcetol, Diphenyl Oxide, Ethyl Vanillin, Eugenol, Fruitate, Fenchyl Alcohol, Phenylethyl Phenyl Acetate, Galaxolide, γ-C6 to C13 Lactone, α-Pinene, β-Pinene, Limonene, Myrcene , β-caryophyllene, geraniol, geranyl acetate, geranyl formate, geranyl nitrile, hedione, helional, heliotropin, cis-3-hexenol, cis-3-hexenyl acetate, cis-3-hexenyl salicylate, hexyl cinnamic aldehyde, hexyl salicylate, hyacinth dimethyl acetal, hydrotropic alcohol, hydroxycitronellal, indomethacin, Ionone, Isobornyl Acetate, Isocyclocitral, Iso E Super, Isoeugenol, Isononyl Acetate, Isobutylquinoline, Jasmal, Jasmolactone, Jasmophillan, Coabon, Ligustral, Lilial, Lime Oxide, Linalool, Linalool Oxide, Linalyl Acetate, Liral, Manzanate, Mayol, Menthyl Acetate, Menthonate, Methyl Anthranilate , methyl eugenol, menthol, alpha-methyl ionone, beta-methyl ionone, gamma-methyl ionone, methyl isoeugenol, methyl lavender ketone, methyl salicylate, muguetaldehyde, mugol, musk TM-II, musk 781, musk C14, muscone, civetone, cyclopentadecanone, cyclohexadecenone, cyclopentadecanolide, ambrette, cyclohexadecanolide, 10-oxahexadecanolide Decanolide, 11-oxahexadecanolide, 12-oxahexadecanolide, ethylene brassylate, ethylene dodecanedioate, oxahexadecen-2-one, 14-methyl-hexadecenolide, 14-methyl-hexadecanolide, musk ketone, musk tibetine, nopyr alcohol, nopyr acetate, neryl acetate, nerol, methyl phenyl acetate, miracaldehyde, neobergamate, oakmoss no. 1, Oribone, Oxyphenylone, p-Cresyl Methyl Ether, Pentalid, Phenylethyl Alcohol, Phenylethyl Acetate, Rubafuran, Damascenone, Raspberry Ketone, Dimethylbenzyl Carbinyl Acetate, Jasmacyclene, Methyl Naphthyl Ketone, Rosephenone, Rose Oxide, Sandalore, Sandela, Santalex, Styraryl Acetate, Styraryl Propionate, Terpineol, Terpinyl Acetate, Tetrahydrolinalool, Tetrahydrolinalyl Acetate, Tetrahydrogeraniol, Tetrahydrogeranyl Acetate, Tonalid, Traseolide, Triplral, Thymol, Vanillin, Verdox, Yarayala, Anise Oil, Bay Oil, Boar Rose Oil, Cananga Oil, Cardamom Oil, Cassia Oil, Cedarwood Oil, Orange Oil, Mandhali oil, tangerine oil, basil oil, nutmeg oil, citronella oil, clove oil, coriander oil, elemi oil, eucalyptus oil, fennel oil, galbanum oil, geranium oil, hiba oil, cypress oil, jasmine oil, lavandin oil, lavender oil, lemon oil, lemongrass oil, lime oil, neroli oil, oakmoss oil, ocotia oil, patchouli oil, peppermint oil, perilla oil, petitgrain oil, pine oil, rose oil, rosemary oil, camphor oil, aromatic oil, clary sage oil, sandalwood oil, spearmint oil, spike lavender oil, star anise oil, thyme oil, tonka bean tincture, turpentine oil, crocodile bean tincture, vetiver oil, ylang-ylang oil, grapefruit oil, yuzu oil, benzoin, balsam of Peru, tolu balsam, tuberose oil, musk tincture, castoreum tincture, civet tincture, ambergris tincture, etc. Fragrances may be used in combination.

The aerosol composition may also contain preservatives such as methyl parahydroxybenzoate, antifungal agents such as 1-hydroxy-2-pyridone salts (piroctone olamine), dyes such as food dyes, antioxidants such as dibutylhydroxytoluene, ascorbic acid, and tocopherol acetate, and ultraviolet absorbers such as 2-ethylhexyl paramethoxycinnamate, oxybenzone, and hydroxymethoxybenzophenone sulfonic acid.

(Propellant)
The propellant is a content that is pressurized and filled into the aerosol container together with the concentrate. The propellant is sprayed together with the concentrate from the nozzle of the spray button, which will be described later, by operating the aerosol metering valve, which will be described later. At that time, the propellant imparts a driving force when spraying the concentrate, and breaks the aerosol composition into fine particles, which are then dispersed in the space.

The type of propellant is not particularly limited. For example, the propellant is a liquefied gas. Examples of the liquefied gas include liquefied petroleum gas, aliphatic hydrocarbons having 3 to 5 carbon atoms such as propane, normal butane, isobutane, normal pentane, and isopentane, hydrofluoroolefins such as trans-1,3,3,3-tetrafluoroprop-1-ene and trans-2,3,3,3-tetrafluoroprop-1-ene, dimethyl ether, and mixtures thereof. The liquefied gas may be used in combination with a compressed gas. Examples of the compressed gas include nitrogen gas, carbon dioxide gas, nitrous oxide gas, and compressed air. Among these, the propellant is preferably liquefied petroleum gas.

In the aerosol product of this embodiment, the blend ratio (volume ratio) of the concentrate to the propellant at 20°C may be 20/80 to 80/20, preferably 30/70 to 80/20, and more preferably 30/70 to 70/30. If the blend ratio (volume ratio) of the propellant exceeds 80 volume%, the aerosol composition is likely to have a poor deodorizing effect on floor surfaces, etc. On the other hand, if the blend ratio (volume ratio) of the propellant is less than 20 volume%, the aerosol composition is likely to have a poor deodorizing effect on air.

When the concentrate and propellant are filled, the internal pressure of the aerosol metered valve at 20°C is preferably 0.15 MPa or more, more preferably 0.16 MPa or more. The internal pressure of the aerosol metered valve at 20°C is preferably 0.8 MPa or less, more preferably 0.7 MPa or less. If the internal pressure of the aerosol metered valve is less than 0.15 MPa, the aerosol composition may drip from the nozzle after spraying. On the other hand, if the internal pressure of the aerosol metered valve is more than 0.8 MPa, the aerosol composition may leak from the aerosol container. The internal pressure of the aerosol metered valve can be measured, for example, at 20°C by connecting a PGM-E small pressure sensor (manufactured by Kyowa Electric Industry Co., Ltd.) attached to a WGA-710C instrument conditioner (manufactured by Kyowa Electric Industry Co., Ltd.) to the aerosol metered valve.

The aerosol product containing the concentrate and propellant described above is filled under pressure into an aerosol container. There are no particular limitations on the aerosol container. As an example, the aerosol container is a substantially cylindrical pressure-resistant container with an opening at the top. The opening is a filling port for filling the aerosol composition, and after the concentrate is filled, it is closed by an aerosol metering valve described below.

The material of the aerosol container is not particularly limited. For example, the material of the aerosol container is metal such as aluminum or tinplate, synthetic resin such as polyethylene terephthalate, pressure-resistant glass, etc.

The aerosol metering valve is a mechanism for removing the aerosol composition filled in the aerosol container, and is attached to the opening of the aerosol container to close the opening. The aerosol metering valve of this embodiment is formed with a metering chamber for temporarily storing the aerosol composition removed from the aerosol container. The volume of the metering chamber corresponds to the volume of the aerosol composition sprayed in one spray. The volume of the metering chamber in this embodiment is 0.2 to 0.4 mL.

The stem mechanism is the part that is attached to the aerosol metered valve, and has an internal passageway that sends the concentrate and propellant taken into the aerosol metered valve to the spray button, which will be described later. The internal passageway is opened and closed as appropriate by the stem rubber of the stem mechanism.

The spray button is a component for spraying the concentrate taken in from the aerosol container by the aerosol metering valve via the stem mechanism together with the propellant. The spray button is formed with a nozzle for spraying the aerosol composition.

The number, dimensions and shape of the nozzle are not particularly limited. For example, the number of the nozzle may be one or more than two. The size (diameter) of the nozzle is preferably 0.2 mm or more, more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. The diameter of the nozzle is preferably 4.5 mm or less, more preferably 3.0 mm or less, and even more preferably 0.9 mm or less. The shape (cross-sectional shape) of the nozzle may be a circle, an ellipse, a square, or various indefinite shapes. The total area of the nozzle is preferably 0.03 mm ² or more, more preferably 0.1 mm ² or more, and even more preferably 0.25 mm ² or more. The total area of the nozzle is preferably 16 mm ² or less, more preferably 5 mm ² or less, and even more preferably 3.5 mm ² or less.

In the aerosol product of this embodiment, when the user operates the spray button, the stem mechanism and the aerosol metered valve are activated, and the inside of the aerosol container is connected to the outside. As a result, a fixed amount of the aerosol composition in the aerosol container is taken out of the aerosol container according to the pressure difference between the inside of the aerosol container and the outside, and is sprayed from the nozzle of the spray member.

The aerosol product of this embodiment is adjusted so that the amount of each spray is 0.2 to 0.4 mL. If the amount of each spray is less than 0.2 mL, the aerosol composition contains a small amount of deodorizing components, making it difficult to achieve a sufficient deodorizing effect. On the other hand, if the amount of each spray exceeds 0.4 mL, the spray force becomes strong and the sprayed aerosol composition is likely to diffuse. In addition, since the aerosol product of this embodiment has a small amount of each spray, 0.2 to 0.4 mL, the user is prevented from inhaling the sprayed aerosol composition, even in the narrow space of a toilet. As a result, the aerosol product is less likely to cause an unpleasant irritating sensation to the user.

The aerosol product of this embodiment specifies the blending ratio of the concentrate containing the above-mentioned predetermined amount of deodorant component and the propellant, adjusts the amount of spray per time to 0.2 to 0.4 mL, and adjusts the volume average particle diameter of the sprayed particles to be in the range described below, thereby providing an excellent deodorant effect not only in the space of the toilet, but also on the floor surface, etc. Therefore, the method of adjusting the amount of spray per time is not particularly limited. The amount of spray per time can be adjusted, for example, by appropriately adjusting the capacity of the metering chamber in the aerosol metering valve, the time during which the inside of the aerosol container is in communication with the outside when the spray button is operated, etc.

The aerosol composition sprayed by the aerosol product of this embodiment is preferably adjusted so that the 50% volume average particle diameter (D _A ) of the sprayed particles at a position 15 cm away from the nozzle is 17 to 86 μm. The volume average particle diameter (D _A ) is preferably 17 μm or more, more preferably 20 μm or more. The volume average particle diameter (D _A ) is preferably 86 μm or less, more preferably 80 μm or less. When the volume average particle diameter (D _A ) is less than 17 μm, the aerosol product tends to have high diffusibility, making it difficult to apply to floor surfaces, etc., and the deodorizing effect tends to be reduced. On the other hand, when the volume average particle diameter (D _A ) exceeds 86 μm, the aerosol product tends to fall onto floor surfaces, etc., and the effect of the deodorant on the space tends to be reduced. In this embodiment, the volume average particle diameter (D _A ) of the sprayed aerosol composition can be calculated by spraying the aerosol composition so that it passes perpendicularly through the laser beam from a position where the distance between the nozzle of the aerosol product and a laser beam irradiated to a light receiving part from a laser light emitting part of a particle size distribution measuring device (LDSA-1400A, Tohnichi Computer Applications Corporation) is 15 cm, and analyzing the particle size distribution of the sprayed product with an automatic calculation processing device.

As described above, the aerosol product of this embodiment exerts a deodorizing effect not only in the space of the toilet space, but also on malodorous substances on the floor surface, etc. This is because the sprayed aerosol composition does not only float in the space, but also falls appropriately and exerts a deodorizing effect on the surface on which it falls. More specifically, the aerosol product of this embodiment is preferably adjusted so that the falling particle diameter (D _B , aerodynamic diameter described later) of the sprayed aerosol product is 2.50 to 8.00 μm.

The falling particle diameter (D _B ) is the particle diameter (50% volume average particle diameter of the falling particles) measured by an Andersen sampler (LP-20, manufactured by Tokyo Dylec Co., Ltd.) installed 50 cm horizontally away from and 70 cm below the nozzle. The Andersen sampler is a device that collects particles in the air (sprayed aerosol composition) while classifying them. The Andersen sampler has an opening at the top, and collects particles from this opening. Therefore, the Andersen sampler can accurately measure the aerodynamic diameter and particle size distribution of falling particles.

In the aerosol product of this embodiment, the falling particle diameter (D _B ), which is the aerodynamic diameter, is preferably 2.50 μm or more, more preferably 2.80 μm or more. In addition, the falling particle diameter (D _B ) is preferably 8.00 μm or less, more preferably 7.00 μm or less. When the falling particle diameter (D _B ) is less than 2.50 μm, the aerosol product tends to be difficult to apply the aerosol composition to the floor surface, etc., and the deodorizing effect tends to be reduced. On the other hand, when the falling particle diameter (D _B ) is more than 8.00 μm, the aerosol product tends to have too much of the aerosol composition falling on the floor surface, etc., and the deodorizing effect for the space tends to be reduced.

The proportion of the deodorizing component contained in the particles that are 50 cm horizontally away from the nozzle and fall 70 cm downward is preferably 0.15% by mass or more, and more preferably 0.17% by mass or more. The proportion of the deodorizing component is preferably 3.80% by mass or less, and more preferably 3.70% by mass or less. If the proportion of the deodorizing component is less than 0.15% by mass, the aerosol product tends to have a reduced deodorizing effect, especially on floor surfaces. On the other hand, if the proportion of the deodorizing component exceeds 3.80% by mass, the floor surface, etc., tends to become sticky, or in the case of a powder deodorant, it tends to adhere to the surface, damaging the appearance.

The method for producing the aerosol product of this embodiment is not particularly limited. As an example, the aerosol product can be produced by filling an aerosol container with the concentrate, closing the opening of the aerosol container with an aerosol metering valve provided with a metering chamber, and pressurizing and filling the propellant through a stem mechanism. The spray button can be appropriately selected from various trigger buttons, push-down buttons, etc.

As described above, the aerosol product of this embodiment can provide sufficient deodorizing effects not only in the air of the toilet but also on floor surfaces, etc., with only a small amount of use.

<Deodorizing method using a fixed-volume aerosol product>
A deodorizing method using a metered-dose aerosol product according to one embodiment of the present invention (hereinafter also referred to as a deodorizing method) is a method in which an aerosol composition containing a concentrate containing a toilet deodorizing component at 0.5 w/v % or more in the aerosol composition and a propellant in a blending ratio (volume ratio) of the concentrate to the propellant of 20/80 to 80/20 is sprayed in an amount of 0.2 to 0.4 mL per spray.

When carrying out the deodorizing method of this embodiment, the aerosol composition and aerosol product may be the same as those described in the above embodiment.

As described above in relation to the embodiment of the aerosol product, the deodorizing method of this embodiment preferably sprays the particles so that the volume average particle diameter (D _A ) of the sprayed particles at a position 15 cm away from the nozzle is 17 to 86 μm. If the volume average particle diameter (D _A ) is less than 17 μm, the aerosol product sprayed by the deodorizing method of this embodiment tends to have high diffusibility and is difficult to apply to floor surfaces, etc., and the deodorizing effect tends to be reduced. On the other hand, if the volume average particle diameter (D _A ) exceeds 86 μm, the aerosol product tends to fall onto floor surfaces, etc., and the effect of the deodorizer on the space tends to be reduced.

As described above in relation to the embodiment of the aerosol product, the deodorizing method of this embodiment preferably sprays the aerosol composition so that the falling particle diameter (D _B ), which is the aerodynamic diameter measured by an Andersen sampler placed 50 cm horizontally away and 70 cm below the nozzle, is 2.50 to 8.00 μm. This allows the sprayed aerosol composition to not only float in space, but also fall appropriately, so that the deodorizing effect can be achieved on the falling surface as well.

Similarly, in the deodorizing method of this embodiment, it is preferable to spray the aerosol composition so that the proportion of deodorant contained in the spray particles that fall 70 cm downward from the nozzle at a horizontal distance of 50 cm is 0.15 to 3.80 mass% relative to the amount of deodorant components sprayed. This allows the deodorizing method to exert a sufficient deodorizing effect on floor surfaces, etc.

In this embodiment, the number of injections may be one. According to the deodorizing method of this embodiment, the amount of injection per injection is 0.2 to 0.4 mL, so a large amount of injection is not injected. This prevents the user from accidentally inhaling the injected aerosol composition. As a result, the deodorizing method of this embodiment is less likely to cause the user to feel an unpleasant irritation. According to the deodorizing method of this embodiment, the desired effect can be obtained even with one injection, but the number of injections may be two or more if necessary.

As described above, the deodorizing method of this embodiment can achieve sufficient deodorizing effects not only in the space but also on floor surfaces, etc., with only a small amount of use.

The present invention will be described in more detail below with reference to examples. The present invention is not limited to these examples.

<Aerosol products>
Details of the aerosol products used are given below.
Aerosol 1: Button, nozzle diameter φ0.35 mm, flow path length 13.0 mm, spray volume 0.2 mL valve Aerosol 2: Button, nozzle diameter φ0.35 mm, flow path length 13.0 mm, spray volume 1.0 mL valve <Deodorizing ingredient>
Deodorizing component 1: Eporion AS-111 (containing fatty acid salt, surfactant, betaine compound, ethanol), manufactured by Kyoritsu Seiyaku Co., Ltd. Deodorizing component 2: Eporion ECAS-224 (containing fatty acid salt, surfactant, betaine compound, ethanol), manufactured by Kyoritsu Seiyaku Co., Ltd. Deodorizing component 3: Kesmon NS-10N (containing zinc oxide), manufactured by Toagosei Co., Ltd. Deodorizing component 4: Pansil SBP-K100 (containing persimmon tannin, silicate compound, sodium fumarate), manufactured by Release Kagaku Kogyo Co., Ltd.

Example 1
5 mL of the original solution consisting of 3.0 parts by mass of the deodorant component 1 and an appropriate amount of 99.5% ethanol was filled into an aluminum aerosol container with a capacity of 71 mL, and after attaching a valve, the container was pressurized and filled with a propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (20°C)) so that the blending ratio (volume ratio) of the original solution to the propellant was 30/70. A spray button was attached to prepare 50 mL of an aerosol product (the valve and button were the same as those of Aerosol 1). The internal pressure of the aerosol product (internal pressure of the valve; the same applies below) (20°C) was 0.43 MPa. The internal pressure of the valve was measured at 20°C by connecting a PGM-E small pressure sensor (Kyowa Electric Industry Co., Ltd.) attached to a WGA-710C instrument conditioner (Kyowa Electric Industry Co., Ltd.) to an aerosol metering valve. By using this aerosol product, 12 mg of the deodorant component was sprayed each time.

(Examples 2 to 10, Comparative Examples 1 to 4)
An aerosol product was prepared in the same manner as in Example 1, except that the deodorant component, content, valve, and button were changed as shown in Table 1.

The aerosol products obtained in Examples 1 to 10 and Comparative Examples 1 to 4 were evaluated for their spatial deodorization, their deodorization of ingrained odors, the amount of fallen particles (mg), the proportion of the deodorizing component that fell, the volume average particle diameter (D _A ), and the fallen particle diameter (D _B ) according to the following evaluation methods. The results are shown in Table 1.

<Air space deodorization evaluation>
The prepared aerosol product was placed in a 10L Tedlar bag and inflated with odorless air. Separately, 0.5 mL of 1M HClaq and 0.5M Na ₂ Saq were mixed in a 1L Tedlar bag to generate hydrogen sulfide, which was used as a master batch of malodorous substances. Hydrogen sulfide was extracted from the master batch and placed in the Tedlar bag containing the aerosol product so that the hydrogen sulfide concentration was about 1.5 ppm. The aerosol product was sprayed once in the 10L Tedlar bag, and the hydrogen sulfide concentration was measured over time immediately after spraying. The time (T ₀₁ ) until the hydrogen sulfide concentration became 1/10 of the initial concentration was calculated and evaluated according to the following evaluation criteria.
(Evaluation Criteria)
A: T _0.1 was less than 1.0 hour.
A: T _0.1 was 1.0 hour or more and less than 3.0 hours.
x: T _0.1 was 3.0 hours or more.

<Evaluation of deodorization of ingrained odors, measurement of the amount of fallen particles (mg), and measurement of the proportion of deodorizing components that fell>
In a windless space, the aerosol composition was sprayed 20 times horizontally from a height of 70 cm toward a filter paper with a diameter of 70 mm placed on the floor surface 50 cm ahead, and the deodorant component was dropped onto the filter paper. The amount of the deodorant component attached to the filter paper was measured by weighing the change in the weight of the filter paper before and after spraying with a precision balance. The ratio of the deodorant component that dropped was calculated by dividing the amount of the deodorant attached by the amount of the deodorant sprayed (20 sprays). Immediately after the spraying was completed, the filter paper with the deodorant component attached was placed in a 1L Tedlar bag and inflated with odorless air, which was used as a Tedlar bag for testing. Separately, 0.5 mL of 1M HClaq and 0.5M Na ₂ Saq were mixed in a 1L Tedlar bag to generate hydrogen sulfide, which was used as a master batch of malodorous substances. Hydrogen sulfide was extracted from the master batch and injected into a test Tedlar bag, and the hydrogen sulfide concentration was adjusted to about 2.0 ppm. After hydrogen sulfide was injected, the hydrogen sulfide concentration was measured over time. From the measured value, the time (T ₀₁ ) until the hydrogen sulfide concentration became 1/10 of the initial concentration was calculated, and evaluated according to the following evaluation criteria. The reaction between the odor and the deodorant component is different from the gas-liquid and gas-solid reactions in space deodorization, respectively, and becomes a liquid-liquid and solid-solid reaction on the floor surface, and requires time in terms of reaction rate, so ◎ was set to less than 2 hours. The ratio of the deodorant component that fell was calculated by dividing the amount of fallen particles by the amount of deodorant contained in 20 sprays.
(Evaluation Criteria)
A: T _0.1 was less than 2.0 hours.
A: T _0.1 was 2.0 hours or more and less than 7.0 hours.
x: T _0.1 was 7.0 hours or more.

<Measurement of Volume Average Particle Diameter (D _A )>
The aerosol composition was sprayed so as to pass perpendicularly through the laser beam from a laser light emitting part of a particle size distribution measuring device (LDSA-1400A, Tohnichi Computer Applications Co., Ltd.) at a position where the distance between the laser beam irradiated to the light receiving part from the laser light emitting part and the nozzle of the aerosol product was 15 cm, and the particle size distribution of the sprayed product was analyzed by an automatic calculation processing device to calculate the 50% volume average particle diameter (D _A ).

<Measurement of Falling Particle Diameter (D _B )>
The aerosol composition was sprayed 20 times horizontally onto an Andersen sampler (LP-20, manufactured by Tokyo Dylec Co., Ltd., installed in a toilet space measuring 0.95 x 1.40 x 2.20 m high) placed 50 cm horizontally away from the nozzle and 70 cm below, and the particles of the aerosol composition sprayed onto the Andersen sampler were collected at a reduced pressure of 550 mmHg. Collection was performed by suction with a pump for 10 minutes immediately after spraying, and the fallen particles were collected on filter paper with a diameter of 80 mm. The pump was operated from before the aerosol composition was sprayed. The particle size distribution of the falling particles was calculated from the weight changes at each stage in the Andersen sampler, and the falling particle diameter (D _B ), which is the 50% volume average particle diameter of the falling particles, was calculated.

As shown in Table 1, the aerosol products of Examples 1 to 10 were able to deodorize not only the air but also the staining odor on the floor surface. On the other hand, the aerosol products of Comparative Examples 1 and 2, which had a small amount of concentrate relative to the propellant, were unable to deodorize the staining odor. The aerosol product of Comparative Example 3, which had a large amount of concentrate relative to the propellant, was unable to deodorize the air. The aerosol product of Comparative Example 4, which had a large amount of concentrate per spray, was unable to deodorize the staining odor.

Claims (2)

The aerosol composition includes a concentrate containing a toilet deodorizing component and a propellant,
The blending ratio (volume ratio) of the concentrate to the propellant is 20/80 to 80/20;
The deodorant component is contained in the aerosol composition at 4.0 w/v % or more,
The amount of each injection is 0.2 to 0.4 mL.
A fixed-dose aerosol product in which the amount of deodorant ingredient that falls 70 cm downward at a horizontal distance of 50 cm from the nozzle is 0.17 to 2.25% by mass of the amount of deodorant ingredient sprayed (excluding cases where the deodorant ingredient is a harmonized fragrance) . A concentrate containing a toilet deodorizing component in an aerosol composition at 4.0 w/v % or more;
A propellant,
an aerosol composition containing the concentrate and the propellant in a blending ratio (volume ratio) of 20/80 to 80/20;
The amount of each injection is 0.2 to 0.4 mL, and
A deodorizing method using a constant-dose aerosol product, which is sprayed from a nozzle 50 cm horizontally away so that the amount of deodorizing ingredient that falls 70 cm downward is 0.17 to 2.25% by mass of the amount of deodorizing ingredient sprayed (excluding cases where the deodorizing ingredient is a harmonized fragrance) .