Deodorization method

Abstract

To provide a deodorization method that has little effect on an aldehyde-based perfume in a deodorizing composition and shows excellent deodorizing performance for odors derived from aldehydes.SOLUTION: A deodorization method comprises bringing a deodorizing composition in contact with a deodorizing target and making the same dry, the deodorizing composition comprising: (a) a primary amine compound (hereinafter referred to as (a) component); (b) a C2-10 organic carboxylic acid compound (hereinafter referred to as (b) component); and (c) a flavor composition (hereinafter referred to as (c) component), where the (c) component comprises an aldehyde-based perfume, a molar ratio (a) / (b) of a content of the component (a) to a content of the component (b) is 0.05 or more and less than 1.6, and a total content of the (a) component and the (b) component is 0.01 mass% to 3.0 mass%.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a deodorizing method.

Background Art

[0002] In recent years, the needs for scents have been increasing, and it has become a common practice to apply a deodorizing fragrance to hard surfaces such as toilets, living spaces such as living rooms, and textile products such as futons, carpets, sofas, and clothing to impart a pleasant scent. Further, in order to design a pleasant scent in such a fragrance, aldehyde-based fragrances having an aldehyde group are often frequently applied. On the other hand, not only imparting a scent but also a technique for deodorizing malodors such as living odor, body odor, and food odor is expected. Malodors include acid odor derived from fatty acids and the like, and alkaline odor derived from ammonia and the like. For these odors, a high deodorizing effect can be obtained by imparting pH buffering ability to a deodorant. However, for example, aldehyde odor such as nonenal known as body odor is difficult to deodorize chemically, and deodorization by inclusion compounds such as cyclodextrin is carried out but the effect is not sufficient.

[0003] Generally, as a technique for chemically deodorizing aldehyde odor, it is carried out to contact a primary amine to generate an imine for deodorization. For example, Patent Document 1 discloses an aqueous deodorant composition containing a predetermined polyhydroxyamine compound and / or its salt (a), a polyvalent organic acid (b), and water, wherein the content of the component (a) is 0.06 to 10% by mass, the molar ratio of [(a) component / (b) component] is 1.1 to 6.0, and the pH is 6.0 to 9.5. Further, Patent Document 2 discloses a deodorant for a space and / or a hard surface containing a predetermined polyhydroxyamine compound in an amount of 0.005 to 30% by mass and having a pH buffering ability of 0.3 to 300 mmol / kg.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-28071 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-320711 [Summary of the Invention] [Problems to be Solved by the Invention]

[0005] Generally, the reaction between an aldehyde compound and a primary amine proceeds in an acidic or alkaline medium. Patent Documents 1 and 2 disclose deodorant compositions containing a polyhydroxyamine compound and an aldehyde-based fragrance. Since the pH of these compositions is neutral, the decomposition of the aldehyde-based fragrance in the composition does not occur. On the other hand, among the aldehyde compounds present in the object to be deodorized, lower aldehydes such as acetaldehyde can obtain a certain deodorizing effect by the action of the polyhydroxyamine compound. However, further improvement is required for the deodorizing effect of medium-chain or long-chain organic aldehyde compounds having 3 to 16 carbon atoms contained in cooking odors or adult odors, particularly the deodorizing effect at the time when a certain period of time has elapsed after spraying. In addition, in a deodorant composition, it is difficult to achieve both the use of an aldehyde-based fragrance and the improvement of the deodorizing performance of the odor derived from aldehydes. The present invention provides a deodorizing method that has little influence on the aldehyde-based fragrance in the deodorant composition and is excellent in deodorizing performance against the odor derived from aldehydes. [Means for Solving the Problems]

[0006] The present invention relates to a deodorizing method in which a deodorant composition containing (a) a primary amine compound [hereinafter referred to as component (a)], (b) an organic carboxylic acid compound having 2 to 10 carbon atoms [hereinafter referred to as component (b)], and (c) a fragrance composition [hereinafter referred to as component (c)] is brought into contact with an object to be deodorized and dried. Component (c) contains an aldehyde-based fragrance, the molar ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.05 or more and less than 1.6, and the total content of component (a) and component (b) is 0.01% by mass or more and 3.0% by mass or less. [Effects of the Invention]

[0007] According to the present invention, there is provided a deodorizing method that has little effect on aldehyde-based fragrances in a deodorant composition and is excellent in deodorizing performance against odors derived from aldehydes.

Mode for Carrying Out the Invention

[0008] The mechanism by which the deodorizing method of the present invention has little effect on aldehyde-based fragrances in a deodorant composition and is excellent in deodorizing performance against odors derived from aldehydes is unclear, but is considered as follows. Generally, in order to deodorize aldehydes, it is conceivable to react a primary amine with an aldehyde to form an imine, and reduce the volatility of the aldehyde to suppress the odor. However, since such a reaction is a dehydration reaction, the reaction hardly proceeds in a system where excessive water is present. Moreover, since the reaction usually proceeds under acidic or alkaline conditions, the imination reaction hardly proceeds in a deodorant composition which is an aqueous solution close to neutral. As a result, it is presumed that the decomposition of aldehyde-based fragrances can be suppressed in the deodorant composition, and the stability of the fragrance of the composition becomes good. On the other hand, when the deodorant composition according to the deodorizing method of the present invention is brought into contact with aldehyde-based malodorous components present in the object to be deodorized, the composition is concentrated as drying progresses. The present inventors have found that when a composition containing the component (a) and the component (b) in a specific molar ratio of the present invention is concentrated by drying, clusters of the component (a) and the component (b) are formed, and the nucleophilicity of the component (a) is improved. It is presumed that this promotes the nucleophilic addition reaction between the component (a) and aldehydes. In addition, it is presumed that the carboxylic acid of the component (b) acts as a base on the imine generated by the reaction between the component (a) and aldehydes, and the imine and the component (b) form a cluster, thereby suppressing the hydrolysis of the imine and suppressing the return of odor over time after the deodorization treatment. Furthermore, the actions of the component (a) and the component (b) are less likely to occur in the deodorant composition according to the deodorizing method of the present invention, and it is presumed that the reactivity becomes higher in the process of drying the deodorant composition after applying the deodorant composition to the object to be deodorized. Thereby, it is presumed that the influence on the aldehyde-based fragrance in the deodorant composition is small, and the deodorizing performance against the odor derived from aldehydes is improved. Note that the deodorizing method of the present invention is not limited to these mechanisms of action at all.

[0009] The deodorizing method of the present invention is excellent in the effect of reducing the odor derived from aldehydes, particularly the odor derived from medium-chain or long-chain organic aldehyde compounds contained in cooking odor or adult odor. In this specification, the medium-chain or long-chain organic aldehyde compound refers to an organic aldehyde compound having a hydrocarbon group with 3 to 18 carbon atoms. For example, it is known that the odor components generated during aging odor or airing clothes in a room contain aliphatic aldehydes having 7 to 12 carbon atoms (Fiber Recycling Magazine Vol. 44 No. 3 150-156 (2003)), and in the odor generated by the oxidation of tempura oil, etc., hexenal, heptadienal, decadienal and their isomers, etc. Unsaturated aldehydes having 6 to 12 carbon atoms are known to be detected in large amounts (Journal of the Home Economics Society of Japan Vol. 41 No. 11 1023-1030 (1990)).

[0010] The deodorizing method of the present invention contains (a) a primary amine compound [hereinafter referred to as component (a)], (b) an organic carboxylic acid compound having 2 to 10 carbon atoms [hereinafter referred to as component (b)], and (c) a fragrance composition [hereinafter referred to as component (c)], the component (c) contains an aldehyde-based fragrance, the molar ratio (a) / (b) of the content of the component (a) to the content of the component (b) is 0.05 or more and less than 1.6, and the total content of the component (a) and the component (b) is 0.01% by mass or more and 3.0% by mass or less. A deodorizing method is to bring a deodorant composition into contact with an object to be deodorized and dry it. First, the deodorant composition [hereinafter referred to as the deodorant composition of the present invention] used in the deodorizing method of the present invention will be described in detail.

[0011] <Deodorant Composition> The deodorant composition of the present invention contains component (a), component (b), and component (c), and the total content of component (a) and component (b) is 0.01% by mass or more and 3.0% by mass or less.

[0012] <Component (a)> Component (a) is a primary amine compound. Component (a) can be used alone or in combination of two or more. As component (a), a primary amine capable of reacting with an aliphatic aldehyde compound to form an imine can be used. From the viewpoints of nucleophilicity and water solubility, component (a) is preferably a compound having 1 to 5 hydroxy groups and 1 primary amino group in the molecule and having 2 to 18 carbon atoms in total. Further, from the viewpoints of deodorizing effect and the odor of the composition, etc., component (a) is preferably a water-soluble compound having a solubility in water of 5 g / 100 g-water (25 °C) or more, and a non-volatile amine having a boiling point at 760 mmHg of 120 °C or more, preferably 150 °C or more, more preferably 180 °C or more, and particularly preferably 200 °C or more. Examples of such primary amines include polyhydroxyamine compounds such as 2-amino-2-hydroxymethyl-1,3-propanediol (bp. 219 °C (760 mmHg), solubility in water (25 °C) 50 g / 100 g water), 1-amino-3-propanol (bp. 187.5 °C (760 mmHg), miscible with water), 2-amino-1-butanol (bp. 177 °C (760 mmHg), miscible with water), 3-amino-1,2-propanediol (bp. 264 - 265 °C (739 mmHg), miscible with water), 2-amino-1,3-propanediol (bp. 115 - 120 °C (0.06 mmHg), miscible with water), 2-amino-2-methyl-1,3-propanediol (bp. about 151 °C (10 mmHg), soluble in water), 2-amino-2-ethyl-1,3-propanediol (bp. 152 - 153 °C (10 mmHg), soluble in water), 4-amino-1,2-butanediol (bp. 200 °C or higher (760 mmHg), readily soluble in water); ethyleneimine derivatives such as diethylenetriamine (bp. 204.1 °C (760 mmHg), miscible with water), triethylenetetramine (bp. 278 °C (760 mmHg), miscible with water); and sugar amines such as N-(3-aminopropyl)diethanolamine (bp. 207 °C (760 mmHg), miscible with water), glucosamine, galactosamine, hexosamine (no boiling point, miscible with water). Note that compounds with boiling points measured at pressures below 760 mmHg are compounds with a boiling point of 120 °C or higher at least at 760 mmHg.

[0013] (a) component, from the viewpoint of the deodorizing effect, is preferably a non-volatile primary amine having a hydroxy group, more preferably a polyhydroxyamine compound. (a) component, from the viewpoint of the deodorizing effect, is preferably a polyhydroxyamine compound represented by the following general formula (1a) or a salt thereof. In this specification, the non-volatile primary amine of (a) component refers to a primary amine having a boiling point of 120 °C or higher at 760 mmHg.

[0014]

Chemical formula

[0015] [In the formula, R 1a is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms, and R 2a and R 3a are each independently an alkanediyl group having 1 to 5 carbon atoms.]

[0016] In general formula (1a), R 1a is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms. The alkyl group having 1 to 5 carbon atoms may be either linear or branched, and examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, and various pentyl groups. Further, examples of the hydroxyalkyl group having 1 to 5 carbon atoms include a hydroxymethyl group, a 2-hydroxyethyl group, a 2-hydroxypropyl group, a 3-hydroxypropyl group, a 2-hydroxybutyl group, a 3-hydroxybutyl group, and a 4-hydroxybutyl group. R 1a is preferably a hydrogen atom, a methyl group, an ethyl group, a hydroxymethyl group or a 2-hydroxyethyl group, particularly preferably a hydrogen atom, a hydroxymethyl group or a 2-hydroxyethyl group, from the viewpoint of further enhancing the deodorizing effect.

[0017] In general formula (1a), R 2a and R 3a are each independently an alkanediyl group having 1 to 5 carbon atoms. R 2a and R 3a may be the same or different. From the viewpoint of further enhancing the deodorizing effect, the alkanediyl groups having 1 to 5 carbon atoms of R 2a and R 3a are each independently preferably a methylene group, an ethylene group, a trimethylene group, a propane-1,2-diyl group or a tetramethylene group, particularly preferably a methylene group.

[0018] When using the polyhydroxyamine compound represented by the general formula (1a) as a salt such as hydrochloric acid, the pH can be adjusted by adding a base. Examples of bases that can be used include sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc., as well as monoethanolamine, diethanolamine, triethanolamine, methylethanolamine, dimethylethanolamine, etc. Among these, sodium hydroxide and potassium hydroxide are preferred.

[0019] Specific examples of the component (a) include, for example, 1-amino-3-propanol, 2-amino-1-butanol, 3-amino-1,2-propanediol, 2-amino-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-hydroxyethyl-1,3-propanediol, 4-amino-4-hydroxypropyl-1,7-heptanediol, amino sugars, and salts thereof. The salt of the component (a) may be an acid salt obtained by neutralizing the above compounds with an inorganic acid or an organic acid. Examples of the acid that neutralizes the component (a) in the salt of the component (a) include inorganic acids or organic acids, and one or more selected from hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, carbonic acid, fatty acids having 1 to 12 carbon atoms, and alkyl sulfates having 1 to 3 carbon atoms are preferred. Among these, the component (a) is preferably at least one selected from 1-amino-3-propanol, 2-amino-1-butanol, 3-amino-1,2-propanediol, 2-amino-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-hydroxyethyl-1,3-propanediol, amino sugars, and salts thereof, more preferably at least one selected from 2-amino-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-hydroxyethyl-1,3-propanediol, and salts thereof, and still more preferably 2-amino-2-hydroxymethyl-1,3-propanediol or a salt thereof, from the viewpoint of deodorizing performance.

[0020] <Component (b)> The component (b) is an organic carboxylic acid compound having 2 to 10 carbon atoms. The component (b) may be an organic carboxylic acid having 2 to 10 carbon atoms or a salt thereof. The component (b) can be used alone or in combination of two or more. From the viewpoint of deodorizing effect, the component (b) is preferably at least one selected from monocarboxylic acids having 2 to 10 carbon atoms, dicarboxylic acids having 2 to 10 carbon atoms, and salts thereof. As the component (b), at least one selected from monocarboxylic acids which may have a hydroxy group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, dicarboxylic acids which may have a hydroxy group having 2 to 10 carbon atoms, preferably 2 to 7 carbon atoms, and salts thereof is preferable. Further, from the viewpoint of enhancing the deodorizing effect due to the ease of presumed cluster formation, the component (b) is preferably a monovalent or divalent carboxylic acid or a salt thereof having no hydroxy group at the α-position. In the present invention, the α-position means the carbon atom to which the carboxy group is bonded. In the case of a dicarboxylic acid, the carbon atom to which each carboxy group is bonded is the α-position. Examples of the monocarboxylic acid of component (b) include one or more selected from propionic acid, acetic acid, butyric acid, 3-hydroxybutyric acid, γ-hydroxybutyric acid, valeric acid, 3-hydroxyvaleric acid, γ-hydroxyvaleric acid, and salts thereof. Examples of the dicarboxylic acid of component (b) include oxalic acid, maleic acid, malonic acid, 2-methylmalonic acid, 2-ethylmalonic acid, 2-isopropylmalonic acid, 2,2-dimethylmalonic acid, 2-ethyl-2-methylmalonic acid, 2,2-diethylmalonic acid, 2,2-diisopropylmalonic acid, 1,2-cyclohexanedicarboxylic acid, 1,2-cyclopentanedicarboxylic acid (trans form: 5.99, cis form: 6.57), 1,2-cyclooctanedicarboxylic acid, 1,2-cycloheptanedicarboxylic acid, succinic acid, phenylsuccinic acid, 2,3-dimethylsuccinic acid, 2,3-diethylsuccinic acid, 2-ethyl-3-methylsuccinic acid, tetramethylsuccinic acid, 2,3-di-t-butylsuccinic acid, 3,3-dimethylglutaric acid, 3,3-diethylglutaric acid, 3-isopropyl-3-methylglutaric acid, 3-t-butyl-3-methylglutaric acid, 3,3-diisopropylglutaric acid, 3-methyl-3-ethylglutaric acid, 3,3-dipropylglutaric acid, 2-ethyl-2-(1-ethylpropyl)glutaric acid, cyclohexyl-1,1-diacetic acid, 2-methylcyclohexyl-1,1-diacetic acid, cyclopentyl-1,1-diacetic acid, 3-methyl-3-phenylglutaric acid, 3-ethyl-3-phenylglutaric acid, and salts thereof.

[0021] Component (b) may further contain a carboxylic acid having one to three hydroxyl groups at the α-position or a salt thereof. Examples of such carboxylic acids include citric acid and tartaric acid. From the viewpoint of further enhancing the deodorizing effect, the content of the carboxylic acid having one to three hydroxyl groups at the α-position or a salt thereof in component (b) is preferably 80% by mass or less, more preferably 60% by mass or less, still more preferably 40% by mass or less, yet more preferably 20% by mass or less, and preferably 0% by mass or more, and may be 0% by mass.

[0022] (b) As salts of the component, examples include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as magnesium salts, ammonium salts, organic amine salts such as monoethanolamine salts, diethanolamine salts, and triethanolamine salts. Preferably, they are alkali metal salts, and more preferably sodium salts.

[0023] (b) From the viewpoint of further enhancing the deodorizing effect due to the presumed steric hindrance and partitionability (ease of cluster formation), among monocarboxylic acids, one or more selected from propionic acid, acetic acid, and their salts are preferred, and particularly propionic acid or its salt is preferred. Also, from the viewpoint of further enhancing the deodorizing effect due to the presumed steric hindrance and partitionability (ease of cluster formation), among dicarboxylic acids, one or more selected from oxalic acid, malonic acid, succinic acid, and their salts are preferred, and those containing succinic acid or its salt are more preferred. (b) From the viewpoint of further enhancing the deodorizing effect, it preferably contains one or more selected from succinic acid, propionic acid, and their salts, and more preferably contains succinic acid or its salt.

[0024] <(c) component> (c) The component is a fragrance composition containing an aldehyde-based fragrance [hereinafter referred to as the (c ald ) component]. The aldehyde-based fragrance means a fragrance compound having an aldehyde group in the molecule. (c) The component may use a fragrance composition containing one kind of (c ald ) component, or can also be used as a fragrance composition containing a plurality of fragrance compounds containing one or more (c ald ) components in a specific ratio. Also, the (c ald ) component and the (c ald)Fragrance compositions other than the components can be blended separately, and in the present invention, even if blended separately, they are regarded as the fragrance composition of component (c). As the fragrance compounds contained in component (c), those described in "Chemistry of Fragrances" (by Ryoichi Akahoshi, edited by the Chemical Society of Japan, Industrial Chemistry Series, issued on September 16, 1983), "Revised and Enlarged Edition of Synthetic Fragrances - Chemistry and Product Knowledge" (edited by the Synthetic Fragrance Editorial Committee, Chemical Industry Daily Co., Ltd., issued on December 20, 2016), "Basic Knowledge of Fragrances and Perfumery" (by Motoki Nakajima, Sangyo Tosho Co., Ltd., issued on June 21, 1995), and "Perfume and Flavor Chemicals" (by STEFFEN ARCTANDER, MONTCLAIR, N. J., 1969) can be used.

[0025] (c ald )Examples of the aldehyde-based fragrances of component (c) include aliphatic aldehyde fragrances, terpene aldehyde fragrances, and aromatic aldehyde fragrances, and one or more of these can be used. Component (c) can contain aromatic aldehyde fragrances among these aldehyde-based fragrances. The aromatic aldehyde fragrance means a fragrance compound having an aromatic hydrocarbon group and an aldehyde group in the molecule.

[0026] (c ald)The aldehyde-based flavoring components specifically include hexyl aldehyde, heptyl aldehyde, octyl aldehyde, nonyl aldehyde, decyl aldehyde, undecyl aldehyde, dodecyl aldehyde, tridecyl aldehyde, trimethylhexyl aldehyde, methyloctyl acetaldehyde, methylnonyl acetaldehyde, trans-2-hexenal, cis-4-heptenal, 2,6-nonadienol, cis-4-decenal, undecylenal, trans-2-dodecenal, trimethylundecenal, 2,6,10-trimethyl-5,9-undecadienal, citral, citronellal, hydroxycitronellal, perilla aldehyde, methoxydihydrocitronellal, citronellyloxyacetaldehyde, isocyclocitral, centenal, bourgeonal, duplical, masial, boronal, cetonal, phenylacetaldehyde, phenylpropyl aldehyde, cinnamic aldehyde, α-amylcinnamic aldehyde, α-hexylcinnamic aldehyde, hydratropic aldehyde, anisaldehyde, p-methylphenylacetaldehyde, cuminaldehyde, cyclamen aldehyde, p-ethyl-2,2-dimethylhydrocinnamaldehyde, 2-methyl-3-(p-methoxyphenyl)-propyl aldehyde, p-tert-butyl-α-methylhydrocinnamic aldehyde, salicylaldehyde, heliotropin, helional, vanillin, ethylvanillin, methylvanillin, 10-undecenal, 1,2,3,4,5,6,7,8-octahydro-8,8-dimethyl-2-naphthaldehyde, 1-methyl-4-(4-methyl-3-pentenyl)-3-cyclohexene-1-carboxaldehyde (myrac aldehyde), 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde, 3,5-dimethyl-3-cyclohexene-1-carboxaldehyde, 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde and 3,A mixture of 5-dimethyl-3-cyclohexene-1-carboxaldehyde (trade name = ligustral or triplal), benzaldehyde, 3-(4-tert-butylphenyl)butanal (trade name = lilyal), 4-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde and a mixture of 3-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde (trade name = liral / IFF: registered trademark), 3,6(4,6)-dimethyl-3-cyclohexene-1-carboxaldehyde (trade name = cyclovertal / Kao: registered trademark), floral ozone, 2,6,10-trimethyl-9-undecenal may be mentioned, and one or more of these can be used.,

[0027] In the present invention, among these, aromatic aldehyde fragrances, particularly heliotropin, lilyal (trade name), liral (registered trademark), triplal (trade name), benzaldehyde, cinnamic aldehyde, α-hexyl cinnamic aldehyde, α-amyl cinnamic aldehyde and cuminaldehyde are susceptible to the influence of component (a). However, the deodorant composition of the present invention can enjoy the effects of the present invention even when these aromatic aldehydes are contained as the fragrance component of component (c ald )).

[0028] Component (c) may contain fragrances other than aldehyde-based fragrances. Examples of fragrances other than aldehyde-based fragrances include known ones such as hydrocarbon-based fragrances, alcohol-based fragrances, ether-based fragrances, ketone-based fragrances, ester-based fragrances, lactone-based fragrances, cyclic ketone-based fragrances, and nitrogen-containing fragrances, and one or more of these can be used.,

[0029] Component (c) can be blended into the deodorant composition as a fragrance composition containing fragrances other than component (c ald ) and the above-mentioned component (c ald ). Component (c) is (c aldThe composition preferably contains the component in an amount of 0.5% by mass or more, more preferably 1.0% by mass or more, still more preferably 5% by mass or more, and preferably 50% by mass or less, more preferably 30% by mass or less, still more preferably 20% by mass or less, from the viewpoints of fragrance tone, intensity, and residual fragrance property.

[0030] <Composition, etc.> In the deodorant composition of the present invention, the component (a) is preferably contained in an amount of 0.01% by mass or more, more preferably 0.06% by mass or more, still more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, and preferably less than 3.0% by mass, more preferably 2.5% by mass or less, still more preferably 2.0% by mass or less, even more preferably 1.0% by mass or less, when it is not a salt as it is, or when it is a salt, in terms of the non-salt compound. In this specification, the mass of the component (a) is, unless otherwise specified, the mass converted to the corresponding amine when the component (a) is a salt.

[0031] In the deodorant composition of the present invention, the component (b) is preferably contained in an amount of 0.01% by mass or more, more preferably 0.06% by mass or more, still more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, and preferably less than 3.0% by mass, more preferably 2.5% by mass or less, still more preferably 2.0% by mass or less, even more preferably 1.0% by mass or less, from the viewpoint of further enhancing the deodorizing effect by the component (a). The mass of the component (b) is the mass converted to an acid. Hereinafter, unless otherwise specified, the definition of the mass of the component (b) is the same.

[0032] In the deodorant composition of the present invention, the molar ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.05 or more, preferably 0.1 or more, more preferably 0.25 or more, still more preferably 0.3 or more, and less than 1.6, preferably 1.2 or less, more preferably 0.8 or less, from the viewpoint of enhancing the deodorizing performance of component (a). In calculating the molar ratio, the number of moles of component (a) shall be calculated as the number of moles of amine in the primary amine compound contained in the composition of the present invention. The number of moles of component (b) shall also be calculated in the acid form of component (b).

[0033] In the deodorant composition of the present invention, the total content of component (a) and component (b) is 0.01% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and 3.0% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, from the viewpoint of reducing the influence on aldehyde-based fragrances and improving the deodorizing performance against odors derived from aldehydes.

[0034] That is, the deodorant composition of the present invention contains component (a) and component (b) in a total amount of 0.01% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, from the viewpoint of the stability of component (c), and 3.0% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, from the viewpoint of the deodorizing effect.

[0035] The deodorant composition of the present invention preferably contains component (c) in an amount of 0.01% by mass or more, more preferably 0.03% by mass or more, and preferably 1.0% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.1% by mass or less, even more preferably 0.08% by mass or less, from the viewpoints of the odor intensity and residual fragrance of the fragrance and stability.

[0036] The deodorant composition of the present invention contains (c aldThe content of the component is preferably 0.0001% by mass or more, more preferably 0.001% by mass or more, and preferably 0.1% by mass or less, more preferably 0.05% by mass or less, still more preferably 0.02% by mass or less, and even more preferably 0.015% by mass or less, from the viewpoints of the odor intensity, residual fragrance property, and stability of the fragrance.

[0037] In the deodorant composition of the present invention, the mass ratio (a) / (c) of the content of component (a) to the content of component (c) is preferably 2.0 or more, more preferably 3.0 or more, and preferably 20 or less, more preferably 14 or less, from the viewpoint of the solubilizing ability with respect to the liquid.

[0038] In the deodorant composition of the present invention, the mass ratio (a) / (c ald ) of the content of component (a) to the content of component (c ald ) component is preferably 0.5 or more, more preferably 1.0 or more, and preferably 300 or less, more preferably 200 or less, from the viewpoint of the solubilizing ability with respect to the liquid.

[0039] <Water> The deodorant composition of the present invention can optionally contain water from the viewpoints of the stability of component (c) and the effective contact of the deodorant component of the present invention with the object to be deodorized. As the water, ion-exchanged water, tap water, distilled water, purified water, groundwater, well water, etc. can be used. The water can be used in an amount such that the total composition of the composition becomes 100% by mass as the balance of the composition. The deodorant composition of the present invention preferably contains water in an amount of 80% by mass or more, more preferably 85% by mass or more, and preferably 99% by mass or less, more preferably 95% by mass or less, from the viewpoints of the stability of component (c) and the effective contact of the deodorant component of the present invention with the object to be deodorized.

[0040] The deodorant composition of the present invention may be in the form of a liquid or a solid, or may be in a form in which a liquid and a solid coexist. From the viewpoint of effectively bringing components (a) and (b) into contact with the object to be deodorized, the deodorant composition of the present invention is preferably a liquid. The deodorant composition of the present invention may be a liquid deodorant composition.

[0041] The deodorant composition of the present invention may further contain, as needed and within a range not impairing the effects of the present invention, a surfactant, various other commonly added deodorants, solvents (excluding water), oil agents, gelling agents (thickeners), antifoaming agents, chelating agents, salts such as sodium sulfate and N,N,N-trimethylglycine, pH adjusters, antioxidants, quick-drying aids, preservatives, bactericidal and antibacterial agents, plant extracts, pigments, ultraviolet absorbers, and other components (excluding those corresponding to component (a) and component (b)). There is no particular limitation on the surfactant as an optional component, and examples thereof include one or more selected from nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants. From the viewpoint of deodorizing performance, the surfactant as an optional component is preferably one or more selected from nonionic surfactants and cationic surfactants. Generally, odor components adhere to the solid surfaces of fiber products such as fabrics, clothes, carpets, sofas, etc. The surfactant not only suppresses the volatilization of the odor components adhering to the solid surface, but also stably disperses component (a) which is a deodorizing component, improves the contact property with fiber products, etc., and can further enhance the deodorizing performance.

[0042] As the nonionic surfactant, a compound represented by the following general formula (1) or an amine oxide having an aliphatic hydrocarbon group having 10 or more and 16 or less carbon atoms is particularly preferable. R 1 -A-(DO) n -R 2 (1) 〔In formula (1), R 1 represents a linear or branched alkyl group or alkenyl group having 10 or more and 22 or less carbon atoms, preferably 16 or less carbon atoms, and R 2represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. A represents an -O- group or a -COO- group, D represents one or more groups selected from an ethylene group, a trimethylene group, and a propane-1,2-diyl group, n is the average number of moles added, and is a number from 5 to 15. The n (DO) may be the same or different. When DO is different, DO may be a block bond or a random bond.

[0043] R in the general formula (1) 1 From the viewpoint of improving the deodorizing performance, it is preferably an alkyl group or alkenyl group having 10 or more carbon atoms, and preferably 18 or less carbon atoms, more preferably 16 or less carbon atoms, still more preferably 14 or less carbon atoms, and R 2 is preferably a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, more preferably a hydrogen atom or a methyl group, still more preferably a hydrogen atom. In the general formula (1), D is preferably an ethylene group. Also, n is preferably 5 or more, and preferably 14 or less, more preferably 13 or less, still more preferably 12 or less. The nonionic surfactant is particularly preferably one or more selected from polyoxyethylene (the average number of moles of added oxyethylene groups n = 6 to 12. The numbers in the parentheses below are the same). lauryl ether, polyoxyethylene (n = 5 to 12) monoalkyl (secondary hydrocarbon group having 12 to 14 carbon atoms) ether, and polyoxyethylene (n = 6 to 13) methyl laurate.

[0044] Amine oxides having an aliphatic hydrocarbon group having 10 to 16 carbon atoms are preferably N - aliphatic alkyl - N,N - lower alkylamine oxides and N - aliphatic acylaminopropyl - N,N - lower alkylamine oxides. As the aliphatic alkyl, one or more groups selected from a lauryl group, a myristyl group, and a palmityl group are preferable. As the aliphatic acyl group, one or more selected from a lauroyl group, a myristoyl group, and a palmitoyl group are preferable. As the lower alkyl group, one or more selected from a methyl group, an ethyl group, an n - propyl group, an i - propyl group, and a 2 - hydroxyethyl group are preferable.

[0045] Examples of the cationic surfactant include tertiary amine salts and quaternary ammonium salts. Among these, quaternary ammonium salts are preferred. Examples of the quaternary ammonium salt include compounds in which at least one of the four substituents is an alkyl or alkenyl group having 8 to 28 carbon atoms in total, and the remainder is a group selected from a benzyl group, an alkyl group having 1 to 5 carbon atoms, and a hydroxyalkyl group having 1 to 5 carbon atoms. The alkyl or alkenyl group having 8 to 28 carbon atoms in total may be substituted with an alkoxy group, an alkenyloxy group, an alkanoylamino group, an alkenoylamino group, an alkanoyloxy group, or an alkenoyloxy group within this carbon number range.

[0046] Examples of the solvent (excluding water) include lower (having 3 to 4 carbon atoms) alcohols such as ethanol and isopropanol, polyhydric alcohols (having 2 to 12 carbon atoms) such as ethylene glycol, propylene glycol, glycerin, and sorbitol, monoethyl or monobutyl ethers of ethylene glycol or propylene glycol, monoethyl or monobutyl ethers of diethylene glycol or dipropylene glycol, benzyl alcohol, benzyloxyethanol, and ethylene oxide or propylene oxide adducts of phenolic compounds.

[0047] The pH of the deodorant composition of the present invention at 25°C is preferably 6.0 or more, more preferably 6.5 or more, still more preferably 7.0 or more, even more preferably 7.5 or more, and preferably 9.5 or less, more preferably 9.0 or less, still more preferably 8.5 or less, from the viewpoints of the stability of the aldehyde-based fragrance in the composition, the effect on the offensive odor derived from aldehydes, and the reduction of skin irritation. This pH is based on the following pH measurement method. The pH of the deodorant composition of the present invention can be adjusted by adding an acid such as hydrochloric acid or an alkali such as sodium hydroxide to the composition. Generally, the imination reaction of aldehydes and amines proceeds under acidic or alkaline conditions. However, when the pH of the deodorant composition is adjusted to a value close to neutral, while suppressing the decomposition of aldehyde-based fragrances in the composition and stabilizing the fragrance, for aldehyde-based malodorous components present in the object to be deodorized, the composition is concentrated by drying or the like and the imination reaction proceeds, and it is preferable that a high deodorizing effect can be obtained.

[0048] <Method for Measuring pH> Connect a combined electrode for pH measurement (for example, a glass sliding sleeve type manufactured by Horiba, Ltd.) with the internal solution of the pH electrode being a saturated potassium chloride aqueous solution (3.33 mol / L) to a pH meter (for example, pH / Ion Meter F-23 manufactured by Horiba, Ltd.). Next, fill 100 mL beakers with pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) respectively, and immerse them in a constant temperature bath at 25°C for 30 minutes. Immerse the pH measurement electrode in the standardized solution adjusted to a constant temperature for 3 minutes, and perform calibration operations in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the deodorant composition to be measured to 25°C, immerse the electrode of the above pH meter in this deodorant composition, and measure the pH after 1 minute.

[0049] The deodorant composition of the present invention can be suitably used as a deodorant composition for deodorizing odors derived from aldehydes adhering to objects having hard surfaces such as fabrics, clothing, carpets, sofas and other textile products, tableware, trash cans, cooking tables, indoor floors, ceilings, walls, etc. Therefore, the deodorant composition of the present invention may be an aldehyde odor deodorant composition for deodorizing odors derived from aldehydes, and further, an aldehyde odor deodorant composition for deodorizing odors derived from medium-chain or long-chain organic aldehyde compounds.

[0050] <Deodorizing Method> The deodorizing method of the present invention involves contacting a deodorant composition containing component (a), component (b), and component (c) with an object to be deodorized and then drying it, where the molar ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.05 or more and less than 1.6, and the total content of component (a) and component (b) is 0.01% by mass or more and 3.0% by mass or less. The deodorizing method of the present invention may be a deodorizing method that involves contacting the deodorant composition of the present invention with an object to be deodorized and then drying it. Also, the deodorizing method of the present invention may be a deodorizing method that involves spraying the above-mentioned deodorant composition onto an object to be deodorized. In the deodorizing method of the present invention, the preferred embodiments of component (a), component (b), component (c), and optional components, as well as their preferred contents and molar ratios or mass ratios of the contents, are the same as those of the deodorant composition of the present invention. Hereinafter, the deodorizing method of the present invention will be described with specific examples, but the deodorizing method of the present invention is not limited to the specific examples at all.

[0051] The deodorizing method of the present invention may be a deodorizing method that includes a step of contacting the above-mentioned deodorant composition of the present invention with an object to be deodorized (hereinafter referred to as step 1), and then a step of drying the contacted deodorant composition (hereinafter referred to as step 2).

[0052] In step 1, in the deodorant composition of the present invention, the molar ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.05 or more, preferably 0.1 or more, more preferably 0.25 or more, still more preferably 0.3 or more, and less than 1.6, preferably 1.2 or less, more preferably 0.8 or less, from the viewpoint of enhancing the deodorizing performance of component (a).

[0053] In step 1, in the deodorant composition of the present invention, the total content of component (a) and component (b) is 0.01% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and 3.0% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, from the viewpoint of reducing the influence on aldehyde-based fragrances and improving the deodorizing performance against odors derived from aldehydes.

[0054] In Step 2, during the drying process of the deodorant composition of the present invention, the total content of component (a) and component (b) in the composition will increase. The drying of the deodorant composition of the present invention in Step 2 is not particularly limited, and for example, it may be natural drying of the deodorant composition of the present invention.

[0055] In Step 2, in the deodorant composition of the present invention 90 minutes after spraying, from the viewpoint of further improving the deodorizing performance against the odor derived from aldehydes, the total content of component (a) and component (b) of the present invention is preferably 5% by mass or more, more preferably 8% by mass or more, still more preferably 10% by mass or more, and preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 20% by mass or less. In Step 2, it is preferable that the total content of component (a) and component (b) in the deodorant composition that comes into contact with the deodorization target in Step 1 satisfies the above range so that the total content of component (a) and component (b) in the deodorant composition 90 minutes after spraying satisfies this concentration range.

[0056] In the deodorizing method of the present invention, as a method of bringing the deodorant composition into contact with the target, it is preferably used as a spray, lotion, etc. For example, it is preferable to fill the deodorant composition of the present invention into a mist-type spray container and adjust the spray amount per time to 0.1 to 1 mL. As the spray container to be used, known spray containers such as a trigger spray container (direct pressure or accumulator type) or a dispenser-type pump spray container can be used. The deodorization target of the deodorizing method of the present invention is not particularly limited as long as it has a solid surface. For example, by spraying or applying the deodorant composition of the present invention to fabrics such as curtains, clothes such as suits and sweaters, fiber products such as carpets and sofas, objects having hard surfaces such as tableware, trash cans, cooking tables, indoor floors, ceilings, and walls, the odor of the target can be effectively reduced. In particular, it is effective for objects with a large surface area of the deodorization target such as fiber products.

Examples

[0057] ·Examples and Comparative Examples <Preparation of Deodorant Composition> Using the fragrance composition of fragrance 1 and the fragrance compositions shown in Table 1 (fragrances 2 and 3), deodorant compositions with the formulation shown in Tables 2 to 4 were prepared. The fragrance composition of fragrance 1 is a compounded fragrance composed of 5 parts of ethyl cinnamate, 10 parts of linalyl acetate, 15 parts of linalool, 10 parts of hexyl cinnamic aldehyde, 10 parts of perlide, 20 parts of phenylethyl aldehyde, 10 parts of cedar alcohol, and 20 parts of limonene. The proportion of aldehyde-based fragrances in fragrance 1 was 45% by mass.

[0058]

Table 1

[0059] In the deodorant composition of the example in Table 2, as component (a), 2-amino-2-hydroxymethyl-1,3-propanediol (molecular weight 121) was used, as component (b), succinic acid (molecular weight 118) or citric acid (molecular weight 192) was used, and as component (c), fragrance 3 was used. The resulting composition was adjusted to pH with a 1 / 10 N aqueous sodium hydroxide solution. Also, in the deodorant compositions of the examples and comparative examples in Tables 3 and 4, as component (a), 2-amino-2-hydroxymethyl-1,3-propanediol (molecular weight 121) was used, as component (b), succinic acid (molecular weight 118), citric acid (molecular weight 192), propionic acid (molecular weight 141) were used, and as component (c), the above fragrance 1 or fragrance 2 or fragrance 3 shown in Table 1 was used. Furthermore, in the deodorant compositions of the examples and comparative examples in Tables 3 and 4, as other components, ethanol, lauroylaminopropylamine oxide (surfactant), green tea dry distillation extract (plant extract), hydroxyethyl cellulose (thickener), silicone compound (defoamer), ethylenediaminetetraacetic acid tetrasodium salt (chelating agent), di-tert-butylhydroxytoluene (BHT, antioxidant), propylene glycol (polyhydric alcohol), didecyldimethylammonium chloride (antibacterial agent) were used. The resulting composition was adjusted to pH with a 1 / 10 N aqueous sodium hydroxide solution. In the table, in the column of component (a), 2-amino-2-hydroxymethyl-1,3-propanediol is abbreviated as Tris (Tris: Tris (hydroxymethyl) aminomethane).

[0060] <Evaluation of the decomposition of aldehyde, which is an offensive odor component due to drying> A cotton knitted fabric (6 cm × 6 cm) was coated with an ethanol solution containing 0.1% by mass of 2,4-decadienal at an application amount of 30% by mass o.w.f. to obtain a test piece. Note that o.w.f. (on the weight of fiber) indicates the mass of the ethanol solution containing 0.1% by mass of 2,4-decadienal with respect to the cotton knitted fabric in the above case. Also, 2,4-decadienal is the main component of the offensive odor derived from aldehydes. The deodorant composition shown in Table 2 was applied to this test piece in an amount of 30% by mass o.w.f., and it was dried in an environmental control chamber at a temperature of 20°C and a humidity of 40% RH. In the test fabric coated with the deodorant composition, the test fabrics immediately after coating, 30 minutes after coating, 60 minutes after coating, 90 minutes after coating, and 120 minutes after coating were each extracted with acetone, and component (a), component (b), and 2,4-decadienal were quantified by gas chromatography. Based on this quantification result, the total concentration of component (a) and component (b) [(a) + (b) concentration] and the decomposition rate of 2,4-decadienal in the deodorant composition adhered to the test fabric were calculated. The results are shown in Table 2. Also, the same operation as the following <Evaluation of the stability of the fragrance in the composition> was performed to evaluate the stability of the fragrance. As a result, the stability of the deodorant composition of the example was good. From the results in Table 2, it can be seen that in the deodorant composition containing an aldehyde-based fragrance, the stability of the fragrance of the composition is good, but when the composition is brought into contact with 2,4-decadienal, which is the main component of the offensive odor derived from aldehydes, and dried, 2,4-decadienal is preferentially decomposed.

[0061]

Table 2

[0062] <Evaluation of Deodorizing Effect> (1) Preparation of Deodorization Target Object [Cooking Odor Test Piece] In an experimental draft, 500 g of beef (produced in Australia) and 2 pieces of beef tallow were used and cooked on a hot plate for 30 minutes. Aldehyde-derived malodor (main component: 2,4-decadienal) was attached to a cotton jersey cloth (6 cm × 6 cm) suspended 1.5 m above the hot plate to obtain a test piece. [Aging Odor Test Piece] A used cotton sheet of a 40-year-old male with aldehyde-derived malodor (2-nonenal) attached was cut into 6 cm × 6 cm pieces to obtain test pieces.

[0063] (2) Deodorization Method To each of the test pieces obtained in (1) above, a deodorant composition having the formulation shown in Table 3 or Table 4 was sprayed 4 times (about 0.16 g in total) using a spray vial (Maruem Co., Ltd., No. 6) and dried for a predetermined time.

[0064] (3) Evaluation of Deodorization Performance Six experienced panelists aged from their 20s to 50s smelled the odor of the test piece before spraying the deodorant composition (before spraying) and the test piece after spraying the deodorant composition, and evaluated them respectively according to the following 6-level odor intensity display method, and the average value was obtained. The lower the average value of the deodorant composition, the better the deodorizing effect on cooking odor or aging odor. In particular, a deodorant composition with an average value of less than 2 has a high deodorizing effect and is preferable. In addition, the deodorant composition of the example, and further the deodorant composition with an average value of less than 2, shows that no deterioration of the aldehyde-based fragrance occurs even when attached to the deodorization target object, which is preferable. (Evaluation Criteria) 0: The odor derived from the deodorization target object or the fragrance cannot be felt (the above-mentioned cotton jersey cloth before attaching the deodorization target object) 1: The odor cannot be identified, but a faint something can be felt (the level of the detection threshold of the faint odor other than the fragrance-derived scent) 2: A weak odor that can be easily detected and recognized (a weak odor other than the fragrance derived from the fragrance is easily detected, at the level of the recognition threshold) 3: An obvious odor (a weak odor other than the fragrance derived from the fragrance is clearly detected) 4: A strong odor (a foreign odor other than the fragrance derived from the fragrance is strongly felt) 5: Test piece before spraying the deodorant composition (an unbearably strong odor)

[0065] Table 3 shows the evaluation results of spraying the deodorant composition on the cooking odor test pieces. The evaluation of the cooking odor test pieces was carried out 2 hours and 24 hours after spraying the deodorant composition on the test pieces, respectively. In addition, Table 4 shows the evaluation results of spraying the deodorant composition on the aging odor test pieces. The evaluation of the aging odor test pieces was carried out 24 hours after spraying the deodorant composition on the test pieces, respectively.

[0066] <Evaluation of the stability of the fragrance in the composition> 100 ml of the deodorant compositions of Examples 2-1 to 2-6 were placed in a wide-mouth standard bottle PS-No.11, covered, and stored in a constant temperature room at 5°C (standard product) and a constant temperature room at 40°C (evaluation product) for 7 days. As a result of comparing the fragrances of the standard product and the evaluation product after storage, the evaluation products of the deodorant compositions of Examples 2-1 to 2-6 were equivalent to the standard product and were ranked A according to the following evaluation criteria. It can be seen that these deodorant compositions have high stability although they contain a fragrance composition containing an aldehyde-based fragrance despite being formulated with the imine-forming (a) component. On the other hand, Comparative Examples 2-2 and 2-4 contained a large amount of the (a) component and the (b) component, so they were ranked C according to the following evaluation criteria. 〔Evaluation criteria〕 A: Equivalent to the standard product (only A is qualified for the immediately after product) B: Slightly different from the standard product C: Slightly different from the standard product but within the limit D: Clearly different from the standard product

[0067]

Table 3

[0068]

Table 4

[0069] From the evaluation of the deodorizing performance against the cooking odor or aging odor shown in Tables 3 and 4 and the evaluation of the fragrance stability in the composition, the deodorant composition of the example can deodorize the malodor derived from aldehydes, and furthermore, the fragrance derived from the fragrance containing aldehydes did not deteriorate. From this, it can be seen that the deodorant composition of the example can significantly deodorize the malodor derived from aldehydes without impairing the fragrance of the fragrance.

[0070] Formulation examples of the deodorant composition of the present invention are shown in Tables 5 and 6. The deodorant compositions of each formulation example in Tables 5 and 6 have an excellent deodorizing effect on odor components containing aldehydes without impairing the stability of the fragrance.

[0071]

Table 5

[0072]

Table 6

Claims

1. A deodorizing method comprising contacting and drying a deodorant composition containing (a) a primary amine compound [hereinafter referred to as component (a)], (b) an organic carboxylic acid compound having 2 to 10 carbon atoms [hereinafter referred to as component (b)], and (c) a perfume composition [hereinafter referred to as component (c)] with an object to be deodorized, wherein component (c) contains an aldehyde-based perfume, the molar ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.05 or more and less than 1.6, and the total content of component (a) and component (b) is 0.01% by mass or more and 3.0% by mass or less.

2. The deodorizing method according to claim 1, wherein component (a) is a non-volatile primary amine having a hydroxy group.

3. The deodorizing method according to claim 1 or 2, wherein component (a) is a compound having a solubility in water of 5 g / 100 g-water (25 °C) or more and a boiling point at 760 mmHg of 120 °C or more.

4. The deodorizing method according to claim 1 or 2, wherein component (a) contains at least one selected from 1-amino-3-propanol, 2-amino-1-butanol, 3-amino-1,2-propanediol, 2-amino-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-hydroxyethyl-1,3-propanediol, amino sugars, and salts thereof.

5. The deodorizing method according to claim 1 or 2, wherein component (b) is at least one selected from monocarboxylic acids having 2 to 8 carbon atoms, dicarboxylic acids having 2 to 10 carbon atoms, and salts thereof.

6. The deodorizing method according to claim 1 or 2, wherein component (b) contains at least one selected from succinic acid, propionic acid, and salts thereof.

7. The content of the aldehyde-based fragrance in component (c) [hereinafter referred to as component (c ald )] is 0.5% by mass or more and 50% by mass or less, and the deodorizing method according to claim 1 or 2.

8. The deodorizing method according to claim 1 or 2, which deodorizes odors derived from aldehydes.

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