Deodorant

Abstract

To provide a deodorant that contains a hydrazide compound and offers excellent long-lasting deodorizing effects.SOLUTION: A deodorant contains a hydrazide compound and water, as well as at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether, and a buffer agent. The deodorant continues to exhibit deodorizing effects even after drying, significantly enhancing the longevity of the deodorizing effect provided by the hydrazide compound.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a deodorant which contains a hydrazide compound and has excellent durability of deodorizing effect. [Background technology]

[0002] In recent years, along with the increasing demand for comfortable living, the need for odor control measures to make living spaces comfortable is also increasing. Conventionally, as odor control measures in daily life, methods of using spray-type, aerosol-type, stationary-type, etc. deodorants to spray or volatilize into space are known. In such deodorants, organic deodorant components such as dihydrazide compounds and polyamine compounds, and plant extracts such as polyphenols are used as deodorant components.

[0003] Among these deodorant components, hydrazide compounds have excellent deodorant effects against aldehyde-based and ammonia-based odors, and various deodorants containing hydrazide compounds have been studied. For example, Patent Document 1 reports that a deodorant containing a hydrazide compound, adenine sulfate, and cationic amino-modified silicone is not only excellent at removing aldehyde-based and ammonia-based odor components not only at room temperature but also at high temperatures, but also has little re-release of the removed odor components. In addition, Patent Document 2 reports that a deodorant containing a hydrazide compound, hydroxylamine sulfate, smectite, and water can have excellent deodorant effects against both aldehyde and ammonia. However, Patent Documents 1 and 2 do not consider the improvement of the duration of the deodorant effect of the hydrazide compound. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-19872 A [Patent Document 2] JP 2010-5093 A Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional odor countermeasures, a deodorant is sprayed in a space where deodorization is required, or sprayed or applied to an item on which an odor has adhered, so that the sprayed or applied deodorant comes into direct contact with the odor. For a deodorant that is sprayed or applied directly to an odor in this way, it is important that the deodorant has a high deodorizing effect, but it is also desirable that the deodorant effect lasts.

[0006] On the other hand, as a measure against odors, a method of removing or mitigating odors in a space (such as an indoor space or a vehicle interior) by placing a deodorizing liquid in the space where deodorization is required (such as an indoor space or a vehicle interior) is also effective. In addition, a method of removing or mitigating odors in a space by attaching a deodorizing liquid to structures (walls, floors, ceilings, doors, etc.) in the space where deodorization is required (such as an indoor space or a vehicle interior) and products (curtains, sofas, etc.) in the space to add a deodorizing function to the structures or products is also effective. When removing or mitigating odors in a space using such a method, it is important that the deodorizing effect of the deodorizing ingredients is sustained, since the deodorizing liquid is not sprayed directly onto the odors in the space.

[0007] As such, deodorizers (particularly those that are left in a space or attached to structures or products in the space) are required to have a sustained deodorizing effect.

[0008] Therefore, the present inventors have investigated the durability of deodorants containing hydrazide compounds and have found that, although conventional deodorants containing hydrazide compounds exhibit excellent deodorizing effects immediately after spraying or application, the deodorizing effects disappear over time as the deodorants dry out, and the deodorizing effects cannot be sustained.

[0009] Therefore, an object of the present invention is to provide a deodorant which contains a hydrazide compound and has excellent durability of deodorizing effect. [Means for solving the problem]

[0010] The present inventors conducted intensive research to solve the above problems, and found that a deodorant containing a hydrazide compound and water, a deodorant component and water, at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether, and a buffer can exert a deodorant effect even after being in a dry state, and the persistence of the deodorant effect of the hydrazide compound (the property of sustaining the deodorant effect even in a dry state) is dramatically improved. The present invention was completed through further research based on this knowledge.

[0011] That is, the present invention provides the following aspects. Item 1. A deodorant comprising: (A) a hydrazide compound; (B) at least one member selected from the group consisting of a polyhydric alcohol, 3-methoxy-3-methylbutanol, and a polyoxyethylene alkyl ether; (C) a buffer; and (D) water. Item 2. The deodorant according to Item 1, further comprising (E) sulfurous acid and / or a salt thereof. Item 3. The deodorant according to item 1 or 2, which is used by being absorbed into a liquid-absorbent member. Item 4. The deodorizer according to any one of Items 1 to 3, which is used by spraying or applying to the walls of a space where deodorization is required. Item 5. A method for deodorizing, comprising using the deodorant according to any one of items 1 to 4. Item 6. A deodorant storage section that stores the deodorant according to any one of items 1 to 3; a deodorant absorbing section that absorbs the deodorant supplied from the deodorant storage section and deodorizes the space; A deodorizing device having the above structure. Item 7. The device further includes a deodorant storage section that stores the deodorant supplied from the deodorant storage section, 7. The deodorizer according to item 6, wherein the deodorizer suction section is configured to suck up the deodorizer from the deodorizer storage section and absorb the deodorizer. Item 8. A deodorizing method comprising installing the deodorizing device according to item 6 or 7 in a space where deodorization is required. Item 9. A deodorizing method according to Item 8, wherein the deodorant liquid-absorbing part is continued to be used even if it becomes dry. Item 10. A method for improving the durability of the deodorizing effect of a deodorant containing a hydrazide compound, comprising blending (A) the hydrazide compound, (B) at least one selected from the group consisting of a polyhydric alcohol, 3-methoxy-3-methylbutanol, and a polyoxyethylene alkyl ether, (C) a buffering agent, and (D) water into the deodorant. Effect of the Invention

[0012] According to the present invention, the deodorant containing a hydrazide compound can improve the deodorizing effect durability (the property of maintaining the deodorizing effect even in a dry state). Therefore, even if the deodorant of the present invention is sprayed on a structure in a space where deodorization is required or a product in the space, the deodorant can maintain the deodorizing function in the structure or product, and can effectively remove or reduce the bad odor in the space. In addition, when the deodorant of the present invention is used by being absorbed into a liquid-absorbent member, the deodorant can maintain the deodorizing effect even if the volatile components contained in the deodorant liquid volatilize and the liquid-absorbent member becomes dry. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic diagram showing a cross-sectional view of one embodiment of a deodorization device of the present invention. [Diagram 2] 1 is a schematic diagram showing a cross-sectional view of one embodiment of a deodorization device of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] 1. Deodorant The deodorant of the present invention is characterized by containing a hydrazide compound (sometimes referred to as component (A)), at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether (sometimes referred to as component (B)), a buffer (sometimes referred to as component (C)), and water (sometimes referred to as component (D)). The deodorant of the present invention will be described in detail below.

[0015] [(A) Hydrazide compound] The deodorant of the present invention contains a hydrazide compound as component (A). A hydrazide compound is a compound having one or more hydrazide groups (-NH-NH2) in one molecule, and has the effect of adsorbing and deodorizing aldehydes (formaldehyde, acetaldehyde, isovaleraldehyde, etc.) that cause bad odors.

[0016] The hydrazide compound used in the present invention may be any of a monohydrazide compound having one hydrazide group per molecule, a dihydrazide compound having two hydrazide groups per molecule, or a polyhydrazide compound having three or more hydrazide groups per molecule.

[0017] Specific examples of monohydrazide compounds include acetohydrazide, formhydrazide, carbohydrazide, lauric acid hydrazide, salicylic acid hydrazide, propionic acid hydrazide, p-hydroxybenzoic acid hydrazide, naphthoic acid hydrazide, and 3-hydroxy-2-naphthoic acid hydrazide.

[0018] Specific examples of the dihydrazide compounds include succinic acid dihydrazide, adipic acid dihydrazide, oxalic acid dihydrazide, malonic acid dihydrazide, glutaric acid dihydrazide, pimelic acid dihydrazide, suberic acid dihydrazide, azelaic acid dihydrazide, sebacic acid dihydrazide, dodecanedioic acid dihydrazide, terephthalic acid dihydrazide, isophthalic acid dihydrazide, tartaric acid dihydrazide, malic acid dihydrazide, iminodiacetic acid dihydrazide, itaconic acid dihydrazide, dodecane dihydrazide, hexadecanedihydrazide, naphthoedihydrazide, benzene dihydrazide, pyridine dihydrazide, cyclohexane dihydrazide, and the like. dihydrazide, pyromellitic acid dihydrazide, etc.

[0019] Specific examples of polyhydrazide compounds having three or more hydrazide groups in one molecule include citric acid trihydrazide, trinitroacetic acid trihydrazide, nitriloacetic acid trihydrazide, cyclohexanetricarboxylic acid trihydrazide, ethylenediaminetetraacetic acid tetrahydrazide, naphthoic acid tetrahydrazide, polyacrylic acid hydrazide, and the like.

[0020] These hydrazide compounds may be used alone or in combination of two or more.

[0021] Among these hydrazide compounds, from the viewpoint of further improving the durability of the deodorizing effect, preferred are dihydrazide compounds, more preferred are succinic acid dihydrazide and adipic acid dihydrazide.

[0022] The content of the component (A) in the deodorant of the present invention may be appropriately set depending on the type of hydrazide compound used, the target to be deodorized, the level of deodorizing effect to be imparted, and the like, and may be, for example, 0.1 to 20% by weight, preferably 0.5 to 10% by weight, and more preferably 1 to 5% by weight.

[0023] [(B) Polyhydric alcohol, methoxymethylbutanol, and / or polyoxyethylene alkyl ether] The deodorant of the present invention contains, as the component (B), a polyhydric alcohol, 3-methoxy-3-methylbutanol, and / or a polyoxyethylene alkyl ether.

[0024] Among the (B) components, examples of the polyhydric alcohol include dihydric to tetrahydric alcohols. Specific examples of the polyhydric alcohol include dihydric alcohols such as ethylene glycol, propylene glycol, triethylene glycol, diethylene glycol, and isoprene glycol; trihydric alcohols such as glycerin and butanetriol (1,2,3-butanetriol and 1,2,4-butanetriol); and tetrahydric alcohols such as erythritol and pentaerythritol. These polyhydric alcohols may be used alone or in combination of two or more.

[0025] Among the components (B), polyoxyethylene alkyl ether is a compound in which a polyoxyethylene chain is ether-bonded to an alkyl group. The average number of moles of ethylene oxide added to the polyoxyethylene alkyl ether chain is not particularly limited, but may be, for example, 2 to 30, preferably 5 to 20, and more preferably 8 to 12. The alkyl group constituting the polyoxyethylene alkyl ether may be either linear or branched. The number of carbon atoms in the alkyl group constituting the polyoxyethylene alkyl ether is not particularly limited, but may be, for example, 8 to 22, preferably 8 to 14, and more preferably 8 to 10. Specific examples of polyoxyethylene alkyl ether include POE octyl ether, POE isooctyl ether, POE decyl ether, POE isodecyl ether, POE lauryl ether, POE myristyl ether, POE cetyl ether, POE isocetyl ether, POE stearyl ether, POE isostearyl ether, POE arachidyl ether, and POE behenyl ether. Here, "POE" stands for polyoxyethylene, and these polyoxyethylene alkyl ethers may be used alone or in combination of two or more.

[0026] In the deodorant of the present invention, as the component (B), one may be selected from polyhydric alcohols, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ethers and used alone, or two or more of these may be used in combination.

[0027] Of these (B) components, from the viewpoint of further improving the durability of the deodorizing effect, preferred examples include ethylene glycol, propylene glycol, triethylene glycol, glycerin, butanetriol, erythritol, pentaerythritol, 3-methoxy-3-methylbutanol, polyoxyethylene isodecyl ether, and polyoxyethylene decyl ether.

[0028] The content of the (B) component in the deodorant of the present invention may be appropriately set depending on the type of the (B) component used, the target to be deodorized, and the like, and may be, for example, 0.1 to 20% by weight, preferably 0.5 to 10% by weight, and more preferably 1 to 10% by weight.

[0029] In the deodorant of the present invention, the ratio of the (A) component to the (B) component is, for example, 10 to 1000 parts by weight, preferably 50 to 500 parts by weight, and more preferably 100 to 400 parts by weight of the (B) component per 100 parts by weight of the (A) component.

[0030] [(C) Buffer] The deodorant of the present invention contains a buffer as component (C). By using components (B) and (C) in combination, the deodorant of the present invention can improve the durability of the deodorant effect of the hydrazide compound even after the deodorant becomes dry.

[0031] The type of buffer used in the present invention is not particularly limited, but examples thereof include phosphate buffer, citrate buffer, acetate buffer, tartrate buffer, Tris buffer, and the like.

[0032] Specific examples of the phosphate buffer include phosphoric acid and / or its salts. Examples of the salts of phosphoric acid include dialkali metal hydrogen phosphates such as disodium hydrogen phosphate and dipotassium hydrogen phosphate; alkali metal dihydrogen phosphates such as sodium dihydrogen phosphate and potassium dihydrogen phosphate; and trialkali metal phosphates such as trisodium phosphate and tripotassium phosphate. The salts of phosphoric acid may be in the form of a solvate such as a hydrate. As the phosphate buffer, one of phosphoric acid and its salts may be selected and used alone, or two or more of them may be used in combination. Among the phosphate buffers, preferred are phosphates, more preferred are a combination of dialkali metal hydrogen phosphate and alkali metal dihydrogen phosphate, and even more preferred are a combination of disodium hydrogen phosphate and sodium dihydrogen phosphate.

[0033] Specific examples of the citrate buffer include citric acid and / or its salts. Examples of the citrate salt include alkali metal salts such as sodium salt and potassium salt; and alkaline earth metal salts such as calcium salt and magnesium salt. The citrate salt may be in the form of a solvate such as a hydrate. As the citrate buffer, one of citric acid and its salts may be selected and used alone, or two or more of them may be used in combination. Among phosphate buffers, a combination of citric acid and a citrate salt is preferable, a combination of citric acid and an alkali metal citrate salt is more preferable, and a combination of citric acid and trisodium citrate is even more preferable.

[0034] Specific examples of the acetate buffer include acetic acid and / or its salts. Examples of the acetate salt include alkali metal salts such as sodium salt and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; and ammonium salt. The acetate salt may be in the form of a solvate such as a hydrate. As the acetate buffer, one of acetic acid and its salts may be selected and used alone, or two or more of them may be used in combination.

[0035] Specific examples of the tartaric acid buffer include tartaric acid and / or its salts. Examples of the salts of tartaric acid include alkali metal salts such as sodium salts and potassium salts; and alkaline earth metal salts such as calcium salts and magnesium salts. The salts of tartaric acid may be in the form of solvates such as hydrates. As the tartaric acid buffer, one of tartaric acid and its salts may be selected and used alone, or two or more of them may be used in combination.

[0036] A specific example of the tris buffer is trometamol and / or a salt thereof. The salt of trometamol is not particularly limited as long as it is pharma- ceutically acceptable, and examples thereof include organic acid salts such as acetate, and organic acid salts such as hydrochloride and sulfonate. As the tris acid buffer, one of trometamol and its salts may be selected and used alone, or two or more of them may be used in combination.

[0037] Among these components (C), from the viewpoint of further improving the durability of the deodorizing effect, phosphate buffers and citrate buffers are preferable.

[0038] The content of the (C) component in the deodorant of the present invention may be appropriately set depending on the type of the (C) component used, the target to be deodorized, and the like, and may be, for example, 0.01 to 20% by weight, preferably 0.01 to 10% by weight, and more preferably 0.1 to 5% by weight.

[0039] [(D)Water] The deodorant of the present invention contains water as a base. The content of water in the deodorant of the present invention may be the balance of the components (A) and (B) and other additives added as necessary, and may be, for example, 50% by weight or more, preferably 60 to 99% by weight, and more preferably 70 to 97% by weight.

[0040] [(E) Sulfurous acid and / or its salt] The deodorant of the present invention may contain sulfurous acid and / or a salt thereof (sometimes referred to as component (E)) in addition to the above-mentioned components. When the deodorant of the present invention contains component (E), it becomes possible to remarkably improve the durability of the deodorant effect.

[0041] Specific examples of nitrite include alkali metal salts such as sodium salts and potassium salts.

[0042] In the deodorant of the present invention, as the component (E), one type may be selected from sulfurous acid and salts thereof and used alone, or two or more types thereof may be used in combination.

[0043] Of these components (E), from the viewpoint of further improving the durability of the deodorizing effect, preferred are alkali metal salts of sulfite, and more preferred are sodium sulfite.

[0044] The content of the (E) component in the deodorant of the present invention may be appropriately set depending on the type of the (E) component used, the target to be deodorized, and the like, and may be, for example, 0.1 to 30% by weight, preferably 0.1 to 15% by weight, and more preferably 0.5 to 5% by weight.

[0045] In addition, in the deodorant of the present invention, the ratio of the (A) component to the (E) component is, for example, 0.1 to 500 parts by weight, preferably 1 to 250 parts by weight, and more preferably 5 to 100 parts by weight of the (E) component per 100 parts by weight of the (A) component.

[0046] [Other ingredients] In addition to the above-mentioned components, the deodorant of the present invention may contain other additives to the extent that the effects of the present invention are not hindered. Examples of such other additives include other solvents, pH adjusters, preservatives, antibacterial agents, germicides, antioxidants, ultraviolet absorbers, colorants, fragrances, deodorant components other than component (A), surfactants, thickeners, etc.

[0047] [pH] The pH of the deodorant of the present invention is, for example, 4-10, preferably 5-9, and more preferably 6-8.

[0048] [How to use] The deodorizer of the present invention is used by applying it to spaces or objects where deodorization is required, for example, for the purpose of removing or mitigating bad odors present in indoor spaces, vehicle interiors, pet breeding areas, walls, floors, ceilings, curtains, sofas, bedding, beds, clothing, shoes, leather products, cloth products, storage furniture (shoe boxes, etc.), etc.

[0049] To deodorize using the deodorant of the present invention, for example, it is sufficient to place the deodorant in a space to be deodorized or in the vicinity of a product to be deodorized in a state where it is contained in an open container or in a state where it is absorbed into a liquid-absorbing member. Examples of the liquid-absorbing member that absorbs the deodorant of the present invention include fibrous materials such as natural fibers such as cotton, vegetable fibers, and pulp, synthetic fibers such as rayon, polyester, polyethylene terephthalate, polypropylene, and polyethylene, and mixed fibers thereof; wood materials such as wood chips, rattan, bamboo, and sora; and resin sponge materials such as urethane foam. In addition, when the liquid-absorbing member is formed of a fibrous material, it is preferably a nonwoven fabric, but it may also be a woven fabric, knitted fabric, etc. The shape of the liquid-absorbing member may be any of a sheet, a rod, a string, a block, etc.

[0050] When the deodorant of the present invention is used by absorbing it into an absorbent member, the deodorizing effect continues even if the volatile components (water, etc.) in the deodorant of the present invention volatilize and the absorbent member becomes dry, so the absorbent member in the dry state can be used continuously as is. The period during which the absorbent member can be used continuously from the point at which the absorbent member becomes dry varies depending on the composition of the deodorant and the space to be deodorized, but for example, the absorbent member can be used continuously for about 120 days, preferably about 30 days, from the point at which the absorbent member becomes dry.

[0051] In addition, when the deodorant of the present invention is used to deodorize a space (such as an indoor space or a vehicle interior space), the deodorant may be directly sprayed onto the space to be deodorized, but the deodorant may also be sprayed or applied onto the structures of the space (such as walls, floors, ceilings, doors, etc.) or the products in the space (such as curtains, sofas, etc.). In this way, by spraying or applying the deodorant onto the structures of the space or the products in the space, the structures of the space or the products in the space are given a deodorizing function, and the odor in the space is removed or alleviated. In this way, when the structures of the space or the products in the space are given a deodorizing function to deodorize the space, it is required that the deodorizing effect of the deodorant component attached to the structures or products is sustained, and the deodorant of the present invention has an improved sustained deodorizing effect and satisfies such required characteristics. One preferred embodiment of the deodorant of the present invention is a deodorant that is sprayed or applied onto walls to deodorize the indoor space. In addition, when the deodorizer of the present invention is sprayed or applied to structures in a space or products in a space in order to deodorize the space, the structures or products themselves are not the targets of deodorization, so it is not necessary for them to have a bad odor.

[0052] The form of the deodorant of the present invention may be any of spray type, aerosol type, stationary type, wipe sheet type, etc. In the case of spray type or aerosol type, the deodorant of the present invention is contained in a spray container or aerosol container, and the deodorant is sprayed on the space to be deodorized, the structure of the space, the product in the space, the product to be deodorized, etc. In the case of stationary type, the deodorant of the present invention is contained in a container or absorbed into a liquid-absorbent member so as to be in contact with the space, and is placed in the space to be deodorized or near the product to be deodorized. In the case of wipe sheet type, the surface of the object to be deodorized may be wiped with a fabric such as a nonwoven fabric impregnated with the deodorant of the present invention. From the viewpoint of ease of use, etc., the deodorant of the present invention is preferably used in the form of a spray type, aerosol type, or stationary type.

[0053] As an embodiment in which the deodorant of the present invention is used as a stationary type, there can be mentioned a deodorizing device having a deodorant storage section that stores the deodorant of the present invention, and a deodorant suction section that absorbs the deodorant of the present invention supplied from the deodorant storage section and deodorizes the space.

[0054] In the deodorizing device, the means for supplying the deodorizing liquid from the deodorizing liquid storage section to the deodorizing liquid absorbing section is not particularly limited, and examples thereof include a method of impregnating a part of the deodorizing liquid absorbing section with the deodorizing liquid in the deodorizing liquid storage section; a method of adding the deodorizing liquid in the deodorizing liquid storage section to the deodorizing liquid absorbing section; a method of supplying the deodorizing liquid from the deodorizing liquid storage section to a separately provided deodorizing liquid storage section and impregnating a part of the deodorizing liquid absorbing section with the deodorizing liquid in the deodorizing liquid storage section, and the like.

[0055] Examples of the deodorizing device include the deodorizing device shown in FIG. 1 (hereinafter, "first embodiment") and the deodorizing device shown in FIG. 2 (hereinafter, "second embodiment").

[0056] The deodorizing device of the first embodiment has a deodorizer storage section 1 that stores the deodorizer of the present invention, a deodorizer storage section 2 that stores the deodorizer supplied from the deodorizer storage section 1, and a deodorizer suction section 3 that sucks up the deodorizer from the deodorizer storage section 2 and absorbs the deodorizer.

[0057] In the deodorizing device of the first embodiment, the deodorant storage unit 1 is arranged with its opening facing downwards, and is configured so that the deodorant is supplied by gravity from the opening of the deodorant storage unit 1 to the deodorant storage unit 2. In the deodorant device of the first embodiment, the opening of the deodorant storage unit 1 may be provided with a control valve for controlling the supply speed of the deodorant.

[0058] In the deodorization device of the first embodiment, the deodorant storage section 2 is configured to store the deodorant supplied from the deodorant housing section 1.

[0059] In the deodorizing device of the first embodiment, the deodorant absorbing section 3 is arranged so that a part of it is impregnated with the deodorant stored in the deodorant storage section, and is configured to suck up the deodorant and come into contact with the air in the space to be deodorized.

[0060] Moreover, the deodorizing device of the first aspect may be provided with an air blowing section that blows air to the deodorant liquid absorbing section 3. By providing such an air blowing section, the deodorant absorbed in the deodorant liquid absorbing section 3 can be efficiently brought into contact with the air in the space, thereby enabling efficient deodorization.

[0061] The material of the deodorant housing 1 in the deodorizing device of the first embodiment is not particularly limited, and may be any of plastic, glass, ceramic, etc., with plastic being preferred.

[0062] The material of the deodorant storage section 2 in the deodorizing device of the first embodiment is not particularly limited either, and may be made of any of plastic, glass, ceramic, etc., with plastic being preferred.

[0063] The material of the deodorant liquid absorbing part 3 in the deodorizing device of the first embodiment is the same as that of the liquid absorbing member, and examples thereof include fibrous materials such as natural fibers such as cotton, vegetable fibers, pulp, etc., synthetic fibers such as rayon, polyester, polyethylene terephthalate, polypropylene, polyethylene, etc., or mixtures thereof; wood materials such as wood chips, rattan, bamboo, sora, etc.; and resin sponge materials such as urethane foam. When the deodorant liquid absorbing part 3 is made of a fibrous material, it is preferably a nonwoven fabric, but it may also be a woven fabric, knitted fabric, etc. In FIG. 1, the shape of the deodorant liquid absorbing part 3 is sheet-like, but it may also be rod-like, string-like, etc.

[0064] The deodorizing device of the second embodiment has a deodorant storage section 1 having an opening, and a deodorant liquid absorbing section 3 that sucks up the deodorant in the storage section and holds the deodorant.

[0065] In the second embodiment of the deodorizing device, the deodorant absorbing section 3 is inserted through the opening of the storage section and sucks up the deodorant, while the deodorant absorbing section 3 exposed outside the deodorant storage section deodorizes the space.

[0066] The material of the deodorant housing 1 in the deodorizing device of the second embodiment is not particularly limited, and may be any of plastic, glass, ceramic, etc., with plastic being preferred.

[0067] The material of the deodorant liquid absorbing part 3 in the deodorizing device of the second embodiment is not particularly limited as long as it can absorb the deodorant, and examples thereof include fibrous materials such as natural fibers such as cotton, vegetable fibers, and pulp, synthetic fibers such as rayon, polyester, polyethylene terephthalate, polypropylene, and polyethylene, and mixed fibers thereof; wood materials such as wood chips, rattan, bamboo, and sora; and resin sponge materials such as urethane foam. When the deodorant liquid absorbing part 3 is made of a fibrous material, it is preferably a nonwoven fabric, but it may also be a woven fabric, knitted fabric, or the like. In FIG. 2, the shape of the deodorant liquid absorbing part 3 is sheet-like, but it may also be rod-like, string-like, or the like.

[0068] Since the deodorant of the present invention maintains its deodorizing effect even after the volatile components (water, etc.) have evaporated and become dry, when using the deodorant device of the first and second aspects, even if the volatile components of the deodorant have evaporated from the deodorant absorbing part and become dry, the deodorant absorbing part still exerts its deodorizing effect, so the deodorant absorbing part can be used continuously in a dry state without replenishing the deodorant, replacing the deodorant absorbing part, replacing the deodorant device, etc. The period during which the deodorant absorbing part can be used continuously from the point at which it has dried varies depending on the composition of the deodorant, the space to be deodorized, etc., but can be used continuously for about 120 days, preferably about 30 days, from the point at which the deodorant absorbing part has dried.

[0069] 2. How to improve the durability of the deodorizing effect The present invention further relates to a method for improving the durability of the deodorizing effect of a deodorant containing a hydrazide compound, and provides a method for improving the durability, comprising blending, into the deodorant, (A) a hydrazide compound, (B) at least one selected from the group consisting of a polyhydric alcohol, 3-methoxy-3-methylbutanol, and a polyoxyethylene alkyl ether, (C) a buffering agent, and (D) water.

[0070] In the method for improving deodorant sustainability, the type of component (A), the type of component (B), the type of component (C), the blending amounts of components (A) to (D), other components that can be blended, the method of using the deodorant, etc. are as described in the section "1. Deodorant" above. EXAMPLES

[0071] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these.

[0072] Test Example Deodorants having the compositions shown in Tables 1 and 2 were prepared, and the following tests were carried out to evaluate the deodorizing effect of the deodorants in a dried state.

[0073] A pleated air purifier filter (19 cm wide, 28 cm long, 1 cm thick; manufactured by Nikki Universal Co., Ltd.) was impregnated with 58.1 g of deodorant and dried at 25° C. to prepare a dry deodorant-coated filter.

[0074] A 1m3 volume made from acrylic boards 3 The air purifier with the deodorant attached filter and the circulator were placed in the glove box, and the glove box was sealed. Next, 1 L of acetaldehyde at about 10,000 ppm was introduced into the glove box, and the circulator was operated to stir the air in the glove box for 3 minutes. After that, the circulator was stopped, and the acetaldehyde concentration (initial acetaldehyde concentration) in the glove box was measured using a gas detector tube (Acetaldehyde 92M, Gastec Corporation). Next, the air purifier was operated for 1 hour, and then the air purifier was stopped, and the acetaldehyde concentration (acetaldehyde concentration after 60 minutes) in the glove box was measured using the gas detector tube. The deodorization rate after 60 minutes was calculated according to the following calculation formula.

number

[0075] The results are shown in Tables 1 and 2. The deodorants containing a hydrazide compound, a polyhydric alcohol, 3-methoxy-3-methylbutanol, or a polyoxyethylene alkyl ether, and a buffer (Examples 1 to 17) had a significantly improved deodorizing rate after 60 minutes compared to the deodorants containing a hydrazide compound and a polyhydric alcohol (Comparative Examples 1 and 2) and the deodorant containing a hydrazide compound and a buffer (Comparative Example 3). That is, it was revealed that the deodorants containing a hydrazide compound, a polyhydric alcohol, 3-methoxy-3-methylbutanol, or a polyoxyethylene alkyl ether, and a buffer exhibited excellent deodorizing effect even in a dry state, and the persistence of the deodorizing effect (the property of sustaining the deodorizing effect even in a dry state) was improved.

[0076] In addition, although the deodorant containing a hydrazide compound, a polyhydric alcohol, and a sulfite (Comparative Example 1) had a lower deodorizing rate after 60 minutes compared to the deodorant containing a hydrazide compound and a polyhydric alcohol (Comparative Example 1), the deodorant containing a hydrazide compound, a polyhydric alcohol, 3-methoxy-3-methylbutanol, or a polyoxyethylene alkyl ether, a buffer, and a sulfite (Examples 13 to 17) had a dramatically higher deodorizing rate after 60 minutes. That is, it was found that by further blending a sulfite in a deodorant containing a hydrazide compound, a polyhydric alcohol, 3-methoxy-3-methylbutanol, or a polyoxyethylene alkyl ether, and a buffer, the duration of the deodorizing effect (the property of maintaining the deodorizing effect even in a dry state) is significantly improved by a synergistic effect.

[0077] [Table 1]

[0078] [Table 2] [Explanation of symbols]

[0079] 1 Deodorant storage section 2 Deodorant storage section 3. Deodorant absorbent part 4. Deodorant

Claims

1. A spray or aerosol type deodorizing device in which a deodorizer containing (A) a hydrazide compound, (B) at least one selected from the group consisting of a polyhydric alcohol, 3-methoxy-3-methylbutanol, and a polyoxyethylene alkyl ether, (C) a buffering agent, and (D) water is contained in a spray container or an aerosol container.

2. 2. The spray or aerosol deodorizing device according to claim 1, further comprising (E) sulfurous acid and / or a salt thereof.

3. A spray or aerosol type deodorizing device as described in claim 1 or 2, wherein the polyoxyethylene alkyl ether has an average added mole number of ethylene oxide of 5 to 30.

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