Deodorant

Abstract

The present invention provides a deodorant which is highly safe, easy to use in ordinary households, and has a sufficient deodorizing effect on various odors. The deodorant of the present invention is a solution formed by adding amino acids such as glycine, alanine, phenylalanine, sarcosine, threonine, arginine, and glutamic acid; zinc compounds such as zinc carbonate and zinc oxide; and iodine compounds such as iodine pentoxide, iodic acid, periodic acid, iodous acid, hypoiodous acid, iodates, periodates, iodites, and hypoiodites to an aqueous solvent such as water, and mixing them.

Description

Technical Field

[0001] The present invention relates to a deodorant, and more particularly to a deodorant having an excellent deodorizing effect on a wide range of offensive odors originating from sulfur compounds, nitrogen compounds, aldehyde compounds, and the like. Background Art

[0002] In daily life, there are various odors (bad smells) such as wet garbage odor caused by the decay of wet garbage; cigarette odor; toilet odor; body odor, foot odor, sweat odor and other human body odors, and many people are troubled by these bad smells.

[0003] In addition, odors are sometimes generated in conjunction with the business activities of factories and business premises. For example, hydrogen sulfide and methyl mercaptan are generated in pulp mills, and ammonia, trimethylamine, hydrogen sulfide, methyl sulfide, and methyl disulfide are generated in chemical plants and animal fat plants.

[0004] As a countermeasure against the causative substances of these odors, various deodorants have been proposed in the past.

[0005] For example, Patent Documents 1 and 2 describe deodorants in which iodine oxides and oxygen-containing acids are attached to and supported on activated carbon, and these deodorants are considered to be effective against hydrogen sulfide.

[0006] Iodine oxides / oxyacids originally show strong acidity. In addition to iodine oxides / oxyacids, inorganic acids such as hydrochloric acid, sulfuric acid, and nitric acid are attached / loaded on activated carbon for use in Patent Document 1. The reason for this is that hydrogen sulfide is a substance that is relatively easily oxidized when attached to activated carbon, so the oxidizing effect of iodine compounds is made stronger by lowering the pH. Patent Document 2 also records that iodine oxides / oxyacids can be used in combination with inorganic acids such as hydrochloric acid and attached / loaded on activated carbon.

[0007] In the prior art described in Patent Documents 1 and 2, the pH has to be lowered in order to exhibit sufficient deodorizing properties against hydrogen sulfide.

[0008] Malodorous gases such as hydrogen sulfide are also produced in ordinary households, and there is a demand for deodorants in the form of sprays or the like. However, deodorants with low pH as in these conventional technologies are not sufficient in terms of safety.

[0009] In addition, in these conventional technologies, deodorizing performance may be insufficient depending on the type of malodor, and therefore, development of a deodorant that can cope with various malodors is urgently required.

[0010] Prior art literature

[0011] Patent Literature

[0012] Patent Document 1: Japanese Patent Application Laid-Open No. 62-161372

[0013] Patent Document 2: Japanese Patent Application Publication No. 2002-191968 Summary of the invention

[0014] Problems to be solved by the invention

[0015] The present invention has been made in view of the above-mentioned background art, and an object of the present invention is to provide a deodorant which is highly safe, easy to use in ordinary households, etc., and has a sufficient deodorizing effect on various odors.

[0016] Means for solving problems

[0017] The present inventors have conducted intensive studies to solve the above problems and have found that a deodorant containing an amino acid, a zinc compound, and an iodine compound as active ingredients dissolved in an aqueous solvent can solve the above problems, thereby completing the present invention.

[0018] That is, the present invention provides a deodorant characterized in that the deodorant is a solution containing an amino acid zinc complex in which an amino acid is coordinated with a zinc ion, an iodine compound, and an aqueous solvent.

[0019] The present invention also provides a deodorant characterized in that the deodorant is a solution produced by adding an amino acid, a zinc compound, and an iodine compound to an aqueous solvent and mixing the mixture.

[0020] The present invention also provides a method for producing a deodorant, characterized in that an amino acid, a zinc compound, and an iodine compound are added to an aqueous solvent and mixed to prepare a solution.

[0021] Effects of the Invention

[0022] The deodorant of the present invention can exert a deodorizing effect on various odors. In particular, ethyl mercaptan, propyl mercaptan, butyl mercaptan, etc. are poorly soluble in water. The active ingredients of the deodorant of the present invention have good compatibility with surfactants. By adding surfactants to the deodorant of the present invention, poorly soluble odors can also be removed.

[0023] Liquid deodorants such as aqueous solutions usually only dissolve odorous gases in the solution and temporarily remove them from the atmosphere. As the temperature rises, the odorous gases are sometimes released again. However, in the deodorant of the present invention, the odorous gases (especially hydrogen sulfide and thiols) are not released again, but are removed fundamentally.

[0024] The deodorant of the present invention can exhibit a sufficient deodorizing effect even when used at a pH near neutral, and therefore has high safety and is suitable for use in a spray or the like in general households to remove odorous gases. DETAILED DESCRIPTION

[0025] Hereinafter, the present invention will be described, but the present invention is not limited to the following embodiments and can be implemented with arbitrary modifications.

[0026] The deodorant of the present invention is a solution prepared by adding an amino acid, a zinc compound, and an iodine compound to an aqueous solvent and mixing the mixture.

[0027] In addition, the method for producing the deodorant of the present invention is to add an amino acid, a zinc compound, and an iodine compound to an aqueous solvent and mix them to prepare a solution.

[0028] In the solution of the deodorant of the present invention, an amino acid and a zinc compound coexist, and it is presumed that an amino acid zinc complex in which the amino acid and zinc ion are coordinated is formed.

[0029] That is, the deodorant of the present invention is a solution containing an amino acid zinc complex in which an amino acid is coordinated with a zinc ion, an iodine compound, and an aqueous solvent.

[0030] The amino acid contained in the deodorant of the present invention has an amino group (-NH2) and a carboxyl group (-COOH) in the molecule, and exhibits a deodorizing effect on ammonia, acetic acid, formaldehyde, etc. due to the presence of these functional groups.

[0031] Examples of amino acids in the deodorant of the present invention include glycine, dimethylglycine, trimethylglycine, sarcosine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, glutamine, asparagine, arginine, glutamic acid, aspartic acid, histidine, and lysine, and any of the D-form, L-form, and racemic form can be used. In addition, salts of these amino acids can also be used.

[0032] These amino acids may be used alone or in combination of two or more.

[0033] Among the above-mentioned amino acids, glycine, sarcosine, alanine, phenylalanine, threonine, arginine, and glutamic acid are preferred from the viewpoints of availability, cost, deodorizing performance, and the like, and glycine is particularly preferred.

[0034] The deodorant of the present invention contains a zinc compound. The zinc compound coexists with an amino acid in an aqueous solvent to form an amino acid zinc complex. The deodorant of the present invention exhibits deodorizing performance against various odorous gases due to the interaction between the amino acid zinc complex and the iodine compound described below.

[0035] When salts or oxides of metals other than zinc, such as copper, iron, nickel, magnesium, silver, and aluminum, are used in combination with iodine compounds, deodorizing properties may be achieved, but precipitation may occur in the solution, resulting in coloration of the solution.

[0036] The amino acid zinc complex formed by the coexistence of a zinc compound and an amino acid has high solubility in an aqueous solvent, is colorless, and has a high deodorizing function, and is therefore suitable as a component of a deodorant.

[0037] Examples of the zinc compound contained in the deodorant of the present invention include zinc oxide, zinc carbonate, zinc hydroxide, zinc chloride, zinc sulfate, zinc nitrate, zinc phosphate, zinc acetate, zinc gluconate, zinc citrate, and zinc phenolsulfonate.

[0038] Zinc oxide and zinc carbonate are preferred from the perspectives of availability, safety, etc. Zinc oxide is a harmless substance used as a raw material for cosmetics, pharmaceuticals, etc., has a high deodorizing effect, and has an antibacterial effect in addition to the deodorizing effect, so it is particularly preferred as a zinc compound contained in the deodorant of the present invention.

[0039] These zinc compounds may be used alone or in combination of two or more.

[0040] Zinc oxide and zinc carbonate are generally poorly soluble in water, but when an amino acid coexists in a certain amount, an amino acid zinc complex is formed, and the zinc oxide and zinc carbonate become soluble in an aqueous solvent such as water.

[0041] It should be noted that not all of the amino acids contained in the deodorant of the present invention need to coordinate with zinc ions, and amino acids that do not coordinate with zinc ions may exist. This is actually preferred from the perspective of being able to exert a deodorizing effect on various odors.

[0042] Regarding the addition ratio of zinc and amino acid added when manufacturing the deodorant of the present invention, the amino acid is preferably 2 mol or more, more preferably 3 mol or more, and particularly preferably 6 mol or more per 1 mol of zinc. In addition, it is preferably 50 mol or less, more preferably 20 mol or less, and particularly preferably 10 mol or less.

[0043] When the ratio of the amino acid added is not less than the above lower limit, the poorly water-soluble zinc compound can be sufficiently dissolved in the aqueous solvent.

[0044] In addition, the stoichiometric ratio of the amino acid zinc complex is zinc: amino acid = 1: 2. When the amino acid content exceeds 2 moles relative to 1 mole of zinc, it is believed that the remaining amino acids that are not used to form the amino acid zinc complex (not coordinated with zinc ions) surround the amino acid zinc complex. In this case, it is believed that due to the presence of the remaining amino acids, the solubility in aqueous solvents is fully exerted, and the deodorization performance against ammonia and aldehydes is exerted.

[0045] On the other hand, when the content ratio of amino acids is below the above upper limit, it is not only advantageous in terms of cost, but also can fully exert the deodorizing performance against sulfur-based malodorous gases such as hydrogen sulfide. It is presumed that this is because the amino acid zinc complex is not buried in excess amino acids, and the deodorizing performance of zinc against sulfur-based malodorous gases such as hydrogen sulfide can be fully exerted.

[0046] When preparing the deodorant of the present invention, a solution of a zinc compound and an amino acid (a solution containing an amino acid zinc complex) may be prepared first, or the zinc compound, the amino acid and other components such as an iodine compound may be mixed together.

[0047] When a poorly water-soluble zinc compound such as zinc oxide or zinc carbonate is used, the following methods are available as methods for preparing a solution containing an amino acid zinc complex, but are not limited to these methods: a suspension of a zinc compound of a specified concentration and an aqueous amino acid solution of a specified concentration are prepared in advance, and the two are mixed in a manner to achieve a specified combined ratio; fine particles of the zinc compound and an amino acid are mixed in a specified ratio, and the mixture is dissolved in an aqueous medium to a specified concentration; fine particles of the zinc compound are added and mixed in a specified ratio relative to the amino acid in an aqueous amino acid solution of a specified concentration to achieve a specified concentration; etc.

[0048] The content of the zinc compound in the deodorant of the present invention (as zinc) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and particularly preferably 0.03% by mass or more. In addition, it is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 3% by mass or less.

[0049] By setting it within the above range, the deodorizing function can be sufficiently exhibited.

[0050] The iodine compound contained in the deodorant of the present invention has a strong oxidizing action, and thus exhibits a deodorizing effect on hydrogen sulfide, methyl mercaptan, etc. by decomposing these gases. In addition, the iodine compound exhibits strong acidity, and thus exhibits a deodorizing effect by neutralizing ammonia and trimethylamine.

[0051] The iodine compound contained in the deodorant of the present invention is not particularly limited, and specific examples thereof include oxides of iodine, oxyacids of iodine, oxyacids of iodine, alkali metal salts of iodine, alkaline earth metal salts of iodine, etc. As oxyacids of iodine, sodium salts, potassium salts, lithium salts, ammonium salts, calcium salts, magnesium salts, etc. can be exemplified.

[0052] More specifically, examples of the iodine compound include iodine pentoxide (I2O5), iodic acid (HIO3), periodic acid (HIO4), iodous acid (HIO2), hypoiodous acid (HIO), iodates (M(IO3) n ), periodate (M(IO4)n ), iodite (M(IO2) n ), hypoiodite (M(IO) n ), potassium iodide (KI), sodium iodide (NaI), calcium iodide (CaI2), barium iodide (BaI2), etc. It should be noted that in the above salts, M is a metal such as potassium, sodium, lithium, magnesium, calcium, barium, etc.; ammonium ion; etc., and n is a natural number.

[0053] These iodine compounds may be used alone or in combination of two or more.

[0054] Among the above-mentioned iodine compounds, iodine pentoxide, iodic acid, periodic acid, iodates, and periodates are more preferred in terms of ease of acquisition and strength of deodorizing effect, and iodine pentoxide, sodium iodate (NaIO3), and sodium periodate (NaIO4) are particularly preferred.

[0055] In the deodorant of the present invention, the content ratio of zinc ions and iodine compounds is preferably 0.01 mol or more, more preferably 0.03 mol or more, and particularly preferably 0.1 mol or more relative to 1 mol of zinc ions. In addition, it is preferably 3 mol or less, more preferably 2.5 mol or less, and particularly preferably 2 mol or less.

[0056] When the content is above the lower limit, the deodorizing performance against various odors can be balanced. When the content is below the upper limit, the cost can be suppressed. When the content is below the upper limit, the solution does not show color, and the coloring problem when using the deodorant is not likely to occur (in other words, when the content exceeds the upper limit and contains an iodine compound, iodine may be freed in the solution and the solution may change color to brown).

[0057] The content of the iodine compound in the deodorant of the present invention (content in terms of iodine) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and particularly preferably 0.03% by mass or more. In addition, it is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 3% by mass or less.

[0058] When the content is within the above range, deodorizing performance, cost, solution color, and the like are favorable.

[0059] The deodorant of the present invention is also a solution prepared by adding the above-mentioned amino acid, zinc compound and iodine compound to an aqueous solvent and mixing the mixture.

[0060] Examples of the aqueous solvent include water such as ion-exchanged water and tap water; a mixed solvent of water and a water-soluble organic solvent; etc. From the viewpoint of deodorizing performance, etc., the aqueous solvent is preferably water.

[0061] In addition, when a mixed solvent of water and a water-soluble organic solvent is used, examples of the water-soluble organic solvent include: monohydric alcohols such as methanol, ethanol, propanol, isopropanol, and butanol; polyhydric alcohols such as ethylene glycol, propylene glycol, 1,3-propylene glycol, 1,3-butanediol, 1,4-butanediol, polyethylene glycol, polypropylene glycol, and glycerol; glycol monoethers such as lower alkyl ethers of these polyhydric alcohols; and the like.

[0062] When a mixed solvent of water and a water-soluble organic solvent is used, only one of the above-mentioned water-soluble organic solvents may be mixed with water and used, or two or more of them may be mixed with water and used.

[0063] When the mixed solvent of water and the water-soluble organic solvent contains a monohydric alcohol, an antibacterial effect can be added to the deodorant.

[0064] When the mixed solvent of water and a water-soluble organic solvent contains a polyol, when the deodorant is applied to a substrate such as cloth, paper, nonwoven fabric, or wood, the deodorant component can be fixed to the substrate, thereby improving the sustainability of the deodorizing effect.

[0065] In addition, when a mixed solvent of water and a water-soluble organic solvent is used, the solubility of various additives described later is excellent, and added value can be imparted to the deodorant.

[0066] When a mixed solvent of water and a water-soluble organic solvent is used, the lower limit of the proportion of the water-soluble organic solvent is preferably 3% by mass or more, particularly preferably 5% by mass or more, and the upper limit is preferably 20% by mass or less, particularly preferably 10% by mass or less.

[0067] The deodorant of the present invention may be blended with additives such as flavoring agents, essential oils, colorants, plant extracts, preservatives, bactericidal and antibacterial agents, surfactants, and pH adjusters within a range that does not impair the deodorizing effect.

[0068] Examples of preservatives or antimicrobial agents include parabens, isothiazolinones, pyrithione salts, nitrites, and triazines.

[0069] These may be used alone or in combination of two or more.

[0070] As the surfactant, any of a cationic surfactant, an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant can be used.

[0071] Cationic surfactants and amphoteric surfactants can impart antibacterial, disinfecting, antiseptic and other effects, and also contribute to improving the stability of the solution and the stability of pH, and therefore are particularly preferably added to the deodorant of the present invention.

[0072] Examples of cationic surfactants include quaternary ammonium salts such as benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride, dequalinium chloride, hexadecyltrimethylammonium bromide, and benzalkonium cetyl phosphate; alkyl carboxylates; alkyl sulfates; alkyl sulfonates; and alkyl phosphates.

[0073] Among the above, quaternary ammonium salts are particularly preferred because they are less susceptible to the influence of pH, metal ions, and the like.

[0074] Examples of anionic surfactants include amine salt-type surfactants.

[0075] Examples of the amphoteric surfactant include amino acid-based surfactants, betaine-based surfactants, and phosphate-based surfactants.

[0076] Examples of the nonionic surfactant include polyethylene glycol alkyl ethers, polyethylene glycol fatty acid esters, alkyl glycosides, fatty acid alkanolamides, glycerol fatty acid esters, alkyl glyceryl ethers, sorbitan fatty acid esters, polyethylene glycol sorbitan fatty acid esters, and sucrose fatty acid esters.

[0077] These surfactants may be used alone or in combination of two or more.

[0078] When the deodorant of the present invention contains a surfactant, it can also exhibit a deodorizing effect on odorous gases that are poorly soluble in water, such as ethyl mercaptan, propyl mercaptan, and butyl mercaptan.

[0079] Furthermore, any of the amino acid, zinc compound and iodine compound, which are the active ingredients of the present invention, has good compatibility with surfactants, and the deodorizing effect on water-soluble odorous gases is not impaired even when the surfactant is contained.

[0080] Examples of pH adjusters include amino alcohols such as triethanolamine, triethylenetetramine, trishydroxymethylaminomethane, 3-amino-1,2-propanediol, and 2-amino-2-methylpropanol; and basic inorganic compounds such as sodium hydroxide, potassium hydroxide, sodium hydrogen carbonate, sodium carbonate, sodium sesquicarbonate, and sodium percarbonate.

[0081] The deodorant of the present invention contains an iodine compound, and if it does not contain a pH adjuster, the pH is acidic at about 1, and safety for use in general households and the like cannot be ensured.

[0082] Therefore, by using a pH adjuster to increase the pH (particularly, to near neutral), safety is improved, and it becomes easy to use in general households and the like.

[0083] On the other hand, as described in Patent Documents 1 and 2, it is known that the oxidizing action of the iodine compound is weakened by increasing the pH, and thus the deodorizing action of the iodine compound on hydrogen sulfide and the like is believed to be weakened.

[0084] In the deodorant of the present invention, since the iodine compound and the amino acid zinc complex coexist, the deodorizing effect against hydrogen sulfide and the like can be fully exhibited even at a pH near neutral.

[0085] The pH of the deodorant of the present invention is preferably 4 or more, more preferably 5 or more, and particularly preferably 6 or more. It is preferably 10 or less, more preferably 9 or less, and particularly preferably 8 or less.

[0086] When it is within the above range, safety can be sufficiently ensured and deodorizing performance can be sufficiently exhibited.

[0087] Odorous gases that can be deodorized by the deodorant of the present invention include sulfur compounds such as hydrogen sulfide, methyl mercaptan, ethyl mercaptan, propyl mercaptan, butyl mercaptan, methyl sulfide (dimethyl sulfide), methyl disulfide (dimethyl disulfide); nitrogen compounds such as ammonia, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine; aldehyde compounds such as formaldehyde, acetaldehyde; etc.

[0088] The deodorant of the present invention contains amino acid, zinc compound and iodine compound as active ingredients, and exerts deodorizing performance against various odorous gases through the interaction of the active ingredients.

[0089] The deodorant of the present invention can be used as a solution containing an aqueous solvent and left to stand, or it can be processed into various products containing an aqueous solvent and used. Examples of the processed products include sprays, gels, and coatings.

[0090] Example

[0091] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples unless the gist thereof is exceeded.

[0092] [Preparation of deodorant]

[0093] The components shown in Table 1 were mixed to prepare deodorant stock solutions 1 to 16 and deodorant stock solutions 101 to 106.

[0094] [Table 1]

[0095]

[0096] In addition, in Table 1, "two-sided surfactant" means lauryl dimethylaminoacetic acid betaine.

[0097] In addition, the "zinc / iodine ratio" represents the molar ratio of iodine atoms relative to zinc. For example, the molecular weight of zinc oxide (ZnO) is 81.41, and the molecular weight of diiodine pentoxide (I2O5) is 333.81, so the "zinc / iodine ratio" of the deodorant stock solution 1 can be calculated as (2×3.1 / 333.81) / (1 / 81.41)=1.5.

[0098] When preparing deodorant stock solutions 1 to 16, firstly, the zinc compound and the amino acid were weighed in a beaker, ion exchange water was added, the solution was heated to 70°C, and then stirred for 30 minutes to obtain a transparent liquid. Next, the transparent liquid was cooled to 30°C, and the iodine compound and other components were dissolved to obtain deodorant stock solutions 1 to 16.

[0099] When preparing deodorant stock solutions 101 to 105, the zinc compound and the amino acid were weighed in a beaker, ion exchange water was added, the solution was heated to 70° C., stirred for 30 minutes to obtain a transparent liquid, and then cooled to obtain deodorant stock solutions 101 to 105.

[0100] Deodorant stock solutions 1 to 4, 6 to 16, and 101 to 106 are colorless and transparent. On the other hand, deodorant stock solution 5 containing a large amount of iodine compound is a liquid that changes color to brown.

[0101] After deodorant stock solutions 1 to 4, deodorant stock solutions 6 to 16, and deodorant stock solutions 101 to 106 were diluted to 10% with ion exchange water, a dilution solution for deodorization test was prepared by adding an appropriate amount of triethanolamine to adjust the pH to 7. Hereinafter, the dilution solution prepared by diluting "deodorant stock solution n" is referred to as "deodorant dilution solution n" (n = 1 to 4, 6 to 16, 101 to 106).

[0102] [Deodorization test 1]

[0103] A 3L glass separable flask (hereinafter simply referred to as "flask") having a gas injection port, a pressure regulating port, a detection tube measurement port, and a preparation port was prepared, and hydrogen sulfide was injected as the target malodorous gas from the gas injection port using a syringe, and the inside of the flask was stirred for 10 seconds using an air pump. After standing for 10 minutes, the initial concentration of hydrogen sulfide in the flask was measured using a detection tube (manufactured by GASTEC CORPORATION, No. 4LL, 4LB).

[0104] Next, 3 mL of the deodorant dilution solution n was poured into the flask to start the deodorization test.

[0105] The concentration (volume ppm) of the target malodorous gas (hydrogen sulfide) in the flask was measured at the time when a predetermined time had passed (15 minutes, 30 minutes, 60 minutes, and 120 minutes), and the deodorization rate (%) was calculated by the following formula (1).

[0106] In Table 2, "tr" means that the concentration of the target malodorous gas has fallen below the detection limit of the detection tube (less than 1 volume ppm). The same applies to other tables.

[0107] [Number 1]

[0108]

[0109] [Table 2]

[0110]

[0111]

[0112]

[0113] [Deodorization test 2]

[0114] The same procedure as Deodorization Test 1 was performed except that methyl mercaptan was used as the target malodorous gas and the detection tube was changed to No. 71 and 70L manufactured by Gastec Corporation. The concentration of methyl mercaptan (volume ppm) at the time when the predetermined time elapsed was measured and the deodorization rate was calculated. The results are shown in Table 3.

[0115] [Table 3]

[0116]

[0117]

[0118]

[0119] [Deodorization test 3]

[0120] The deodorant dilution 1 was used, ammonia was used as the target malodorous gas, and the detection tube was changed to No. 3La manufactured by GASTEC CORPORATION. The same method as the deodorization test 1 was followed to measure the ammonia concentration (volume ppm) at the time when the predetermined time had passed, and the deodorization rate was calculated. The results are shown in Table 4.

[0121] [Deodorization test 4]

[0122] The deodorant dilution 1 was used, trimethylamine was used as the target malodorous gas, and the detection tube was changed to No. 180, 180L manufactured by GASTEC CORPORATION. The same method as the deodorization test 1 was used to measure the concentration (volume ppm) of trimethylamine at the time when the prescribed time elapsed, and the deodorization rate was calculated. The results are shown in Table 4.

[0123] [Deodorization test 5]

[0124] The deodorant dilution 1 was used, acetaldehyde was used as the target malodorous gas, and the detection tube was changed to No. 92M manufactured by GASTEC CORPORATION. The same method as the deodorization test 1 was used to measure the concentration of acetaldehyde (volume ppm) at the time when the predetermined time elapsed, and the deodorization rate was calculated. The results are shown in Table 4.

[0125] [Table 4]

[0126]

[0127] [Deodorization test 6]

[0128] The same procedure as in Deodorization Test 1 was performed except that the deodorant dilution 1 or the deodorant dilution 15 was used, tert-butyl mercaptan was used as the target malodorous gas, and the detection tube was changed to No. 75N manufactured by GASTEC CORPORATION, and the concentration of tert-butyl mercaptan (mg / m 3 ), calculate the deodorization rate. When calculating the deodorization rate, use "mg / m 3 ” is substituted for “ppm” in the above formula (1) and the calculation is performed.

[0129] The results are shown in Table 5.

[0130] [Table 5]

[0131]

[0132] [Deodorization test 7]

[0133] In deodorization tests 1 to 5, 120 minutes after the deodorant diluted solution 1 or the deodorant diluted solution 101 was injected, the flask was heated to 40° C. in a water bath, and the deodorization rate was measured 60 minutes after the start of heating. The results are shown in Table 6.

[0134] [Table 6]

[0135]

[0136]

[0137] [Results Summary]

[0138] The deodorant of the present invention, which is a solution prepared by adding an amino acid, a zinc compound, and an iodine compound to an aqueous solvent and mixing them, exhibits a deodorizing effect on hydrogen sulfide, methyl mercaptan, ammonia, trimethylamine, and acetaldehyde.

[0139] Furthermore, the deodorant of the present invention does not re-emit odorous gas due to heating, and can fundamentally remove odorous gas.

[0140] Furthermore, when the deodorant of the present invention further contains a surfactant, it also exhibits a deodorizing effect on tert-butyl mercaptan which is poorly soluble in water.

[0141] Industrial Applicability

[0142] The deodorant of the present invention can exert a deodorizing effect on various odors (especially hydrogen sulfide, methyl mercaptan, ammonia, trimethylamine, and acetaldehyde, which are known as the five major odors), and is therefore widely used as a countermeasure for odors in factories / business premises such as pulp mills, chemical plants, animal fat plants, sewage treatment plants, garbage treatment plants, and petrochemical plants, as well as in ordinary households.

Claims

1. A deodorant, characterized in that: It is a colorless and transparent solution containing an amino acid zinc complex formed by the coordination of an amino acid and a zinc ion, an iodine compound and an aqueous solvent. The iodine compound is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids, iodine oxyacids, iodine alkali metal salts and iodine alkaline earth metal salts. The iodine compound is contained in a ratio of 0.01 mol to 3 mol in terms of iodine atoms per 1 mol of the zinc ion, and the pH is 6 to 10.

2. The deodorant according to claim 1, wherein The iodine compound is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids, and iodine oxyacid salts.

3. The deodorant according to claim 1, wherein The iodine compound is one or more iodine compounds selected from the group consisting of iodine pentoxide, iodic acid, periodic acid, iodous acid, hypoiodous acid, iodates, periodates, iodites, and hypoiodites.

4. The deodorant according to claim 1, wherein Contains amino acids that are not coordinated to the zinc ion.

5. The deodorant according to claim 1, wherein The amino acid is one or more amino acids selected from the group consisting of glycine, alanine, phenylalanine, sarcosine, threonine, arginine, and glutamic acid.

6. The deodorant according to claim 1, wherein The aqueous solvent is water.

7. A deodorant, characterized in that: It is a colorless and transparent solution produced by adding an amino acid, a zinc compound and an iodine compound to an aqueous solvent and mixing the mixture. The iodine compound is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids, iodine oxyacids, iodine alkali metal salts and iodine alkaline earth metal salts. The iodine compound is contained in a ratio of 0.01 mol to 3 mol in terms of iodine atoms per 1 mol of zinc ions, and the pH is 6 to 10.

8. The deodorant according to claim 7, wherein The zinc compound is one or more zinc compounds selected from the group consisting of zinc carbonate and zinc oxide.

9. The deodorant according to claim 7 or 8, wherein The iodine compound is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids, and iodine oxyacid salts.

10. The deodorant according to claim 7 or 8, wherein The iodine compound is one or more iodine compounds selected from the group consisting of iodine pentoxide, iodic acid, periodic acid, iodous acid, hypoiodous acid, iodates, periodates, iodites, and hypoiodites.

11. The deodorant according to claim 7 or 8, wherein Contains amino acids that are not coordinated to the zinc ion.

12. The deodorant according to claim 7 or 8, wherein The amino acid is one or more amino acids selected from the group consisting of glycine, alanine, phenylalanine, sarcosine, threonine, arginine, and glutamic acid.

13. The deodorant according to claim 7 or 8, wherein The aqueous solvent is water.

14. A method for producing a deodorant, characterized in that: An amino acid, a zinc compound and an iodine compound are added to an aqueous solvent and mixed to prepare a colorless and transparent solution, wherein the iodine compound is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids, iodine oxyacids, iodine alkali metal salts and iodine alkaline earth metal salts, and the solution contains the iodine compound in a ratio of not less than 0.01 mol and not more than 3 mol in terms of iodine atoms per 1 mol of zinc ions, and the pH is not less than 6 and not more than 10.

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