Method for improving the durability of deodorizing effect of deodorant

Abstract

To provide a method for improving the persistence of deodorant effect of a deodorant.SOLUTION: According to the method herein, a deodorant contains at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether, as well as a deodorant component and water, so that the persistence of deodorant effect of the deodorant component can be improved dramatically.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for improving the durability of the deodorizing effect of a deodorant. [Background technology]

[0002] In recent years, along with the increasing demand for more comfortable living, there has also been an increasing need for odor control measures to make living spaces more comfortable. Conventionally, methods of combating odors in daily life have been known, such as using spray-type, aerosol-type, or stationary deodorizers to spray or volatilize the space. These deodorizers use organic deodorizing ingredients such as dihydrazide compounds and amine compounds, or plant extracts such as polyphenols, as deodorizing ingredients.

[0003] Conventionally, various deodorants have been developed with the aim of improving deodorizing function. 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 malodorous components not only at room temperature but also in high-temperature environments, but also has little re-release of the removed malodorous components. Furthermore, Patent Document 2 reports that a deodorant containing a hydrazide compound, hydroxylamine sulfate, smectite, and water can exhibit excellent deodorizing effects against both aldehydes and ammonia. However, Patent Documents 1 and 2 do not consider improving the durability of the deodorizing effect of the hydrazide compound. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-19872 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-5093 Summary of the Invention [Problem to be solved by the invention]

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

[0006] On the other hand, as a countermeasure against odors, a method of using a deodorizer in a space where deodorization is desired (such as an indoor space or the interior of a vehicle) to remove or mitigate odors in the space is also effective. Another effective method is to attach a deodorizer to the structures (walls, floors, ceilings, doors, etc.) of the space where deodorization is desired (such as an indoor space or the interior of a vehicle) or to products (curtains, sofas, etc.) in the space, thereby adding deodorizing functionality to the structures or products, thereby removing or mitigate odors in the space. When removing or mitigate odors in a space using such methods, it is important that the deodorizing effect of the deodorizing ingredients is sustained, since the deodorizer is not sprayed directly onto the odors in the space.

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

[0008] Under these circumstances, the present inventors have investigated the sustainability of deodorizers containing deodorizing ingredients and have found that, although conventional deodorizers exhibit excellent deodorizing effects immediately after spraying or application, or when the deodorizer remains in the space after being left to stand, the deodorizing effects disappear over time as the space dries out, and the deodorizing effects cannot be sustained.

[0009] Therefore, an object of the present invention is to provide a method for improving the durability of the deodorizing effect of a deodorant. [Means for solving the problem]

[0010] The present inventors conducted extensive research to solve the above-mentioned problems and discovered that by incorporating at least one selected from the group consisting of a polyhydric alcohol, 3-methoxy-3-methylbutanol, and a polyoxyethylene alkyl ether in a deodorizing agent in addition to the deodorizing component and water, the durability of the deodorizing effect of the deodorizing component can be dramatically improved. More specifically, the inventors discovered that when a deodorizing agent having the above composition is used by impregnating a liquid-absorbent material or by adhering it to a space structure or a product in the space, the deodorizing effect can be maintained even after the volatile components contained in the deodorizing agent have volatilized and become dry. The present invention was completed through further research based on this finding.

[0011] That is, the present invention provides the following aspects. Item 1. A method for improving the sustainability of the deodorizing effect of a deodorant, the method comprising blending (A) a deodorizing component, (B) at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether, and (C) water into the deodorant. Item 2. The method for improving deodorizing effect according to claim 1, which is carried out to maintain the deodorizing effect after the deodorizer has dried. [Effects of the Invention]

[0012] According to the present invention, the durability of the deodorizing effect of a deodorizer can be improved. Therefore, even when a deodorizer whose durability of deodorizing effect has been improved by the method of the present invention is sprayed onto a structure in a space where deodorization is required or onto a product in the space, the deodorizing function can be maintained in the structure or product, making it possible to effectively remove or mitigate malodors in the space. Furthermore, when a deodorizer whose durability of deodorizing effect has been improved by the method of the present invention is absorbed into a liquid-absorbent member and used, the deodorizing effect can be maintained even if the volatile components contained in the deodorizer volatilize and the liquid-absorbent member becomes dry. DETAILED DESCRIPTION OF THE INVENTION

[0013] The method of the present invention is a method for improving the durability of the deodorizing effect of a deodorant, and is characterized by blending the deodorant with component (A), at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether (B), and water (C). The method of the present invention will be described in detail below.

[0014] [(A) Deodorizing ingredient] In the method of the present invention, the deodorizer contains a deodorizing component. The deodorizing component used in the present invention may be appropriately selected depending on the type of malodorous substance, and examples thereof include hydrazide compounds, amine compounds, polyphenols, betaine compounds, acids, bases, metal ions, etc. Suitable examples of deodorizing components include deodorizing components that exhibit deodorizing effects by adsorbing or reacting with aldehydes (formaldehyde, acetaldehyde, isovaleraldehyde, etc.). Specific examples of deodorizing components that exhibit deodorizing effects against aldehydes include hydrazide compounds, amine compounds, polyphenols, betaine compounds, etc.

[0015] Among the deodorizing components, hydrazide compounds are compounds that have one or more hydrazide groups (-NH-NH2) in one molecule and have 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 the monohydrazide compound 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 pyromellitic acid dihydrazide.

[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, and polyacrylic acid hydrazide.

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

[0021] Among the deodorizing components, the amine compound is a compound having at least one amino group in one molecule. The type of amine compound used in the present invention is not particularly limited as long as it has a deodorizing effect, and examples thereof include alkanolamines and polyamines.

[0022] Specific examples of alkanolamines include monoalkanolamines such as monoethanolamine, triethanolamine, monomethanolamine, propanolamine, isopropanolamine, aminomethylpropanol, N-methylethanolamine, N-methylisopropanolamine, N-ethylethanolamine, N-methylpropanolamine, and N-ethylbutanolamine; and dialkanolamines such as diethanolamine, dipropanolamine, diisopropanolamine, dibutanolamine, and 2-amino-2-methyl-1,3-propanediol.

[0023] Specific examples of polyamines include ethylenediamine, diaminopropane, and hexamethylenediamine.

[0024] These amine compounds may be used alone or in combination of two or more.

[0025] Among the deodorizing components, polyphenols are compounds having a phenolic hydroxyl group in one molecule. The type of polyphenol used in the present invention is not particularly limited, as long as it has a deodorizing effect, and examples include flavanols (catechins), flavones, anthocyanidins, leucoanthocyanidins, and proanthocyanidins. Polyphenols are also found in plants such as cypress, grape seeds, pine, Japanese cypress, cedar, tea, camellia, camellia sasanqua, persimmon, bamboo, bamboo grass, sage, thyme, rosemary, eucalyptus, lavender, parsley, apple fruit, mushrooms, and algae. Extracts of these plants can also be used as deodorizing components in the present invention. These polyphenols may be used alone or in combination of two or more.

[0026] Among the deodorizing components, betaine compounds are compounds that have a positive charge and a negative charge at non-adjacent positions within the same molecule, and the positively charged atom has no dissociable hydrogen bonded thereto, resulting in the molecule as a whole having no charge. The type of betaine compound used in the present invention is not particularly limited, as long as it has a deodorizing effect, and examples thereof include lauryl dimethylaminoacetic acid betaine. These betaine compounds may be used alone or in combination of two or more.

[0027] Among the deodorizing components, the acid is not particularly limited as long as it has a deodorizing effect, and examples thereof include citric acid, etc. The acid may be used alone or in combination of two or more.

[0028] Among the deodorizing components, the base is not particularly limited as long as it has a deodorizing effect, and examples thereof include bicarbonate, etc. The base may be used alone or in combination of two or more.

[0029] Among the deodorizing components, the metal ions are not particularly limited as long as they have a deodorizing effect, and examples thereof include silver ions, magnesium ions, zinc ions, titanium ions, copper ions, etc. These metal ions may be used alone or in combination of two or more.

[0030] Among these deodorizing components, from the viewpoint of further improving the durability of the deodorizing effect, preferred are hydrazide compounds and amino compounds; more preferred are alkanolamines, polyamines, monohydrazide compounds and dihydrazide compounds; and even more preferred are acetohydrazide, succinic acid dihydrazide, adipic acid dihydrazide, carbohydrazide, propanolamine, aminomethylpropanol, 2-amino-2-methyl-1,3-propanediol and ethylenediamine. In particular, acetohydrazide is particularly suitable for use because, by the aid of component (B) described below, not only the durability of the deodorizing effect is improved but also the deodorizing effect itself (the deodorizing effect at the initial stage of use) is enhanced.

[0031] In the method of the present invention, the amount of component (A) to be contained in the deodorizer may be appropriately determined depending on the type of deodorizing component 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.

[0032] [(B) Polyhydric alcohol, methoxymethyl butanol, and / or polyoxyethylene alkyl ether] In the method of the present invention, the deodorizer contains, in addition to the component (A), a polyhydric alcohol, 3-methoxy-3-methylbutanol, and / or polyoxyethylene alkyl ether as the component (B). By containing the component (B), it is possible to improve the durability of the deodorizing effect of the component (A).

[0033] Among the polyhydric alcohols of component (B), for example, dihydric to tetrahydric alcohols can be mentioned. Specific examples of polyhydric alcohols include dihydric alcohols such as ethylene glycol, propylene glycol, triethylene glycol, diethylene glycol, triethylene glycol, and isoprene glycol; trihydric alcohols such as glycerin and butanetriol (1,2,3-butanetriol, 1,2,4-butanetriol); and tetrahydric alcohols such as erythritol and pentaerythritol. These polyhydric alcohols can be used alone or in combination of two or more.

[0034] Among the components (B), polyoxyethylene alkyl ethers are compounds in which a polyoxyethylene chain is ether-bonded to an alkyl group. The average number of moles of ethylene oxide added in 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 ethers 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.

[0035] In the present invention, as component (B), one selected from polyhydric alcohols, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ethers may be used alone, or two or more of these may be used in combination.

[0036] 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, and polyoxyethylene alkyl ether.

[0037] In particular, when acetohydrazide is used as component (A), from the viewpoint of further improving the durability of the deodorizing effect, preferred examples of component (B) include ethylene glycol, propylene glycol, triethylene glycol, glycerin, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether; and more preferred examples include ethylene glycol, triethylene glycol, glycerin, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether. Furthermore, when succinic acid dihydrazide is used as component (A), from the viewpoint of further improving the durability of the deodorizing effect, preferred examples of component (B) include ethylene glycol, propylene glycol, triethylene glycol, glycerin, butanetriol, erythritol, pentaerythritol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether; more preferred examples are ethylene glycol, propylene glycol, triethylene glycol, glycerin, butanetriol, erythritol, and pentaerythritol; and particularly preferred examples are glycerin, butanetriol, erythritol, and pentaerythritol. Furthermore, when adipic acid dihydrazide and / or carbohydrazide are used as component (A), preferred examples of component (B) include glycerin; from the viewpoint of further improving the durability of the deodorizing effect. Furthermore, when propanolamine, aminomethylpropanol, and / or 2-amino-2-methyl-1,3-propanediol is used as component (A), glycerin is preferably used as component (B) from the viewpoint of further improving the durability of the deodorizing effect.

[0038] In the method of the present invention, the amount of component (B) contained in the deodorant may be appropriately determined depending on the type of component (B) used, the target to be deodorized, etc., 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.

[0039] In the method of the present invention, the ratio of component (A) to component (B) contained in the deodorant 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 component (B) per 100 parts by weight of component (A).

[0040] [(C)Water] In the method of the present invention, the deodorant contains water as a base. The amount of water contained in the deodorant may be the balance of the components (A) and (B) and other additives added as needed, and may be, for example, 50% by weight or more, preferably 60 to 99% by weight, and more preferably 70 to 97% by weight.

[0041] [Monohydric lower alcohol] In the method of the present invention, the deodorant may contain a monohydric lower alcohol, if necessary. Examples of monohydric lower alcohols include monohydric alcohols having 2 to 5 carbon atoms, more specifically ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, n-amyl alcohol, sec-amyl alcohol, isoamyl alcohol, tert-amyl alcohol, neopentyl alcohol, etc. These monohydric lower alcohols may be contained alone or in combination of two or more.

[0042] In the method of the present invention, when a monohydric lower alcohol is contained in the deodorant, the content thereof is not particularly limited, and may be, for example, 1 to 30% by weight.

[0043] [Other ingredients] In the method of the present invention, the deodorant may contain other additives in addition to the above-mentioned components, as long as the additives do not impair the effects of the present invention. Examples of such other additives include other solvents, pH adjusters, preservatives, antibacterial agents, disinfectants, antioxidants, ultraviolet absorbers, colorants, fragrances, surfactants, thickeners, etc.

[0044] [Deodorizer with improved deodorizing effect] The deodorizer whose deodorizing effect has been improved in durability by the method of the present invention can be used by applying it to spaces or objects that require deodorization, for example, for the purpose of removing or alleviating bad odors present in indoor spaces, vehicle interiors, pet care areas, walls, floors, ceilings, curtains, sofas, bedding, beds, clothing, shoes, leather products, fabric products, storage furniture (shoe cabinets, etc.), etc.

[0045] To deodorize using a deodorizer whose deodorizing effect has been improved by the method of the present invention, the deodorizer may be placed in an open-ended container or absorbed into an absorbent member, either in the space to be deodorized or near the product to be deodorized. Examples of absorbent members that absorb the deodorizer include fibrous materials such as natural fibers such as cotton, plant fibers, and pulp, synthetic fibers such as rayon, polyester, polyethylene terephthalate, polypropylene, and polyethylene, or blends thereof; wood materials such as wood chips, rattan, bamboo, and sora; and resin sponge materials such as urethane foam. Furthermore, when the absorbent member is made of a fibrous material, it is preferably a nonwoven fabric, but woven fabrics, knitted fabrics, etc. may also be used. The absorbent member may be in the shape of a sheet, rod, string, block, etc.

[0046] When a deodorant whose deodorizing effect has been improved by the method of the present invention is absorbed into an absorbent member and used, the deodorizing effect persists even when the volatile components (water, etc.) in the deodorant volatilize and the absorbent member becomes dry, so the absorbent member in its dry state can be continued to be used. The period for which the absorbent member can be continued to be used from the point at which it is dried varies depending on the composition of the deodorant, the space to be deodorized, etc., but for example, it can be continued to be used for about 120 days, preferably about 30 days, from the point at which it is dried.

[0047] Furthermore, when a space (such as an indoor space or the interior of a vehicle) is deodorized using a deodorizer whose deodorizing effect has been improved by the method of the present invention, the deodorizer may be sprayed directly onto the space to be deodorized, or the deodorizer may be sprayed or applied to the structures of the space (walls, floors, ceilings, doors, etc.) or products in the space (curtains, sofas, etc.). By spraying or applying the deodorizer to the structures of the space or the products in the space, the structures of the space or the products in the space are imparted with deodorizing function, thereby eliminating or alleviating the malodor in the space. When deodorizing a space by imparting deodorizing function to the structures of the space or the products in the space, it is required that the deodorizing effect of the deodorizing components attached to the structures or products be sustained. The deodorizer produced by the method of the present invention has improved deodorizing effect sustainability and satisfies this requirement. A preferred embodiment of a deodorizer produced by the method of the present invention is a deodorizer that is sprayed or applied to walls to deodorize indoor spaces. In addition, when a deodorizer that has been subjected to the method 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 do not need to have a bad odor, as they are not the targets of deodorization.

[0048] The form of the deodorizer to which the method of the present invention has been implemented may be any of spray, aerosol, stationary, wipe sheet, etc. In the case of spray or aerosol type, the deodorizer to which the method of the present invention has been implemented is placed in a spray container or aerosol container, and the deodorizer is sprayed onto the space to be deodorized, the structure of the space, the products in the space, the products to be deodorized, etc. In the case of stationary type, the deodorizer to which the method of the present invention has been implemented is placed in a container or absorbed into a liquid-absorbent member so that it can come into contact with the space, and then placed in the space to be deodorized or near the products to be deodorized. In the case of wipe sheet type, the surface of the object to be deodorized is wiped with a fabric such as a nonwoven fabric impregnated with the deodorizer to which the method of the present invention has been implemented. From the viewpoint of ease of use, etc., the deodorizer to which the method of the present invention has been implemented is preferably used in the form of spray, aerosol, or stationary. [Example]

[0049] 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.

[0050] Test Example Deodorants having the compositions shown in Tables 1 to 4 were prepared, and the following tests were carried out to evaluate the durability of the deodorizing effect.

[0051] First, 0.4 g of each deodorizer was dropped onto a test cloth (Kanakin No. 3 cotton, 5 cm x 5 cm, Japan Standards Association), placed on a petri dish, and dried with a dryer for 20 minutes (without using hot air), then left to stand at room temperature for 60 minutes. The treated test cloth was then sealed in a 10 L Tedlar bag along with 5 L of odorless air. Then, acetaldehyde was introduced into the Tedlar bag to a concentration of approximately 100 ppm. The time point at which acetaldehyde was introduced was designated as 0 minutes, and the acetaldehyde concentrations in the Tedlar bag after 0 minutes and 60 minutes were measured using a gas detector tube (Acetaldehyde 92M, Gastec Corporation). The deodorizing rate was calculated based on the following formula:

number

[0052] In this test, 0.4 g of deodorant was dropped onto a test cloth, which was then air-dried for 20 minutes and allowed to stand for 60 minutes before the deodorizing rate was measured, so a high deodorizing rate can be said to indicate excellent durability of the deodorizing effect.When 0.4 g of the deodorant liquid was applied to a test cloth and the deodorizing rate was measured under the same conditions as above without drying or leaving to stand, it was confirmed that the deodorizing rate was 30 to 80% in all of the examples and comparative examples.

[0053] The results are shown in Tables 1 to 4. For deodorants containing only a hydrazide compound or an amide compound, the deodorizing rate was 0% after 20 minutes of drying and 60 minutes of standing, and the deodorizing effect of the hydrazide compound was not sustained (Comparative Examples 1 to 8). On the other hand, for deodorants containing a polyhydric alcohol, 3-methoxy-3-methylbutanol, or polyoxyethylene alkyl ether in addition to a hydrazide compound or an amide compound, the deodorizing rate was high and the deodorizing effect was excellent in durability, even after 20 minutes of drying and 60 minutes of standing (Examples 1 to 28).

[0054] The deodorizing rate (initial deodorizing rate) measured without drying or standing using a deodorizer containing acetohydrazide alone (Comparative Example 1) was 31%. In contrast, the deodorizers (Examples 1 to 7) that used acetohydrazide as the hydrazide compound and contained a polyhydric alcohol, 3-methoxy-3-methylbutanol, or polyoxyethylene alkyl ether had deodorizing rates of 31% or more after 20 minutes of drying and 60 minutes of standing. That is, it was confirmed that the deodorizers of Examples 1 to 7 that contained a polyhydric alcohol, 3-methoxy-3-methylbutanol, or polyoxyethylene alkyl ether not only increased the durability of the deodorizing effect of acetohydrazide, but also improved the deodorizing effect rate (initial deodorizing effect) of acetohydrazide itself.

[0055] On the other hand, the deodorizing rate (initial deodorizing rate) measured using a deodorizer containing succinic acid dihydrazide alone (Comparative Example 2) without drying or leaving to stand was 75%. In contrast, when succinic acid dihydrazide was used as the hydrazide compound and a polyhydric alcohol, particularly a trihydric or higher polyhydric alcohol, was used as component (B) (Examples 11 to 15), it was confirmed that the durability of the deodorizing effect was increased. In particular, when butanetriol was used as component (B), it was confirmed that not only was the durability increased, but the deodorizing effect rate itself was also improved.

[0056] [Table 1]

[0057]

Table 2

[0058]

Table 3

[0059]

Table 4

Claims

1. A method for improving the durability of the deodorizing effect of a deodorizer contained in an open container or absorbed in a liquid-absorbent member, comprising blending the deodorizer (excluding those containing one or more metal ions selected from silver, zinc, copper, aluminum, iron, nickel, tin, and lead, and those containing phytoncides) with (A) at least one deodorizing component selected from the group consisting of hydrazide compounds, alkanolamines, polyamines, betaine compounds, magnesium ions, and titanium ions, (B) at least one selected from the group consisting of polyhydric alcohols, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ethers, and (C) water; The method for improving durability, characterized in that the amount of component (B) contained in the deodorant is 0.1 to 20% by weight.

2. The method for improving deodorizing effect according to claim 1, which is carried out to maintain the deodorizing effect after the deodorizer has dried.

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