disinfectant composition

Abstract

Provided is a disinfectant composition that does not contain previously commonly used disinfectant agents, or produces a high disinfectant effect even if the content amount of the disinfectant agent is reduced.　A disinfectant composition containing: (A) a C8-24 internal olefin sulfonate; (B) one or more organic acids selected from monocarboxylic acid, hydroxy acid, and dicarboxylic acid; and water.

Description

[Technical Field]

[0001] The present invention relates to a disinfectant composition.

[0002] Background technology In recent years, regulations on substances that have adverse effects on the environment and humans have been strengthened. In addition, consumers are increasingly interested in products that use safe and reliable substances. In this environment, disinfectant compositions having a disinfecting effect are being used due to the increasing awareness of hygiene. However, there are concerns that many of the disinfectant bases contained in disinfectant compositions have a significant adverse effect on the environment and humans, and that the surfactants used in combination are derived from petrochemical raw materials, etc. Therefore, there is a need for a disinfectant composition that does not use the disinfectant bases that have been widely used up to now, or uses a reduced amount of such base, and instead uses a safe and reliable base to demonstrate disinfecting performance.

[0003] JP 2015-178548 A discloses a bactericidal cleaning agent composition that has a high bactericidal effect even when used for a short period of time, by containing (a) 0.5% by mass to 20% by mass of an internal olefin sulfonate salt having 12 to 18 carbon atoms, (b) 0.1% by mass to 1.0% by mass of an oil-soluble bactericide, and (c) 0.25% by mass to 7.0% by mass of a solvent having a LogP of 2.0 to 4.0, and by having a pH of 4.7 to 7.5 at 25°C. Japanese Patent Application Laid-Open No. 2001-288018 discloses a disinfectant composition for automatic washing machines that contains one or more (A) selected from hypochlorites and hypochlorous acid, one or more (B) selected from amphoteric surfactants and cationic surfactants, and a pH adjuster (C), and thereby exhibits a high disinfecting effect against spore-forming bacteria and mold.

[0004] Summary of the Invention The present invention provides a disinfectant composition that exhibits high disinfecting activity even when it does not contain a disinfectant base that has been widely used up to now, or even when the content of the disinfectant base is reduced.

[0005] The present invention relates to a disinfectant composition containing (A) an internal olefin sulfonate salt having from 8 to 24 carbon atoms (hereinafter referred to as component (A)), (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids (hereinafter referred to as component (B)), and water.

[0006] The present invention also relates to a disinfectant composition consisting essentially of (A) an internal olefin sulfonate salt having from 8 to 24 carbon atoms (hereinafter referred to as component (A)), (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids (hereinafter referred to as component (B)), optionally (C) an organic solvent having a LogP of from 0.5 to 10 (hereinafter referred to as component (C)), optionally (D) a nonionic surfactant (hereinafter referred to as component (D)), and water.

[0007] The present invention also relates to a method for sterilization, which comprises contacting the disinfectant composition of the present invention, either as an undiluted solution or diluted with water, with an object on which bacteria are present.

[0008] According to the present invention, there is provided a disinfectant composition which does not contain a disinfectant base that has been widely used up to now, or which exhibits high disinfecting properties even when the content of the disinfectant base is reduced.

[0009] MODE FOR CARRYING OUT THE INVENTION [Fungicide composition] The fungicide composition of the present invention uses an internal olefin sulfonate salt (component (A)) produced from natural raw materials in combination with a specific organic acid (component (B)), and is therefore able to exhibit high fungicidal activity even without containing the fungicidal bases that have been widely used up to now, or even with reduced amounts of such bases. The reason why the disinfectant composition of the present invention exhibits high disinfecting activity is not entirely clear, but is presumed to be as follows. Component (A) adsorbs to and penetrates the bacterial cell membrane, acting on the cell membrane and membrane proteins and inhibiting bacterial membrane function, killing the bacteria. Meanwhile, the specific organic acid in component (B) adsorbs to and penetrates the bacterial cell membrane without dissociating protons. Component (B) releases protons within the bacterial cell membrane, lowering the intracellular pH and inhibiting metabolism, thereby killing the bacteria. When components (A) and (B) are used together, unexpectedly, component (A) further promotes the penetration of component (B) into the cell membrane, and it is presumed that the synergistic effect of components (A) and (B) produces a high bactericidal effect.

[0010] <Component (A)> Component (A) is an internal olefin sulfonate having a carbon number of 8 to 24. Component (A) can be obtained by sulfonating an internal olefin. From the viewpoint of disinfecting properties, the number of carbon atoms in component (A) is 8 or more, preferably 12 or more, more preferably 16 or more, and from the viewpoint of improving cleaning performance, the number of carbon atoms is 24 or less, preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, and even more preferably 16.

[0011] Component (A) preferably contains an internal olefin sulfonate (IO-1S) having from 8 to 24 carbon atoms and in which the sulfonic acid group is located at position 2 or higher and from 4 or lower, and an internal olefin sulfonate (IO-2S) having from 8 to 24 carbon atoms and in which the sulfonic acid group is located at position 5 or higher. The mass ratio of (IO-1S) to (IO-2S), (IO-1S) / (IO-2S), is preferably from 0.5 to 6.5.

[0012] From the viewpoint of achieving both disinfecting properties and cleaning properties, the mass ratio of the (IO-1S) content to the (IO-2S) content in component (A), (IO-1S) / (IO-2S), is preferably 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, still more preferably 0.8 or more, still more preferably 1 or more, and is preferably 6.5 or less, more preferably 6 or less, still more preferably 5.5 or less, still more preferably 5 or less, still more preferably 4.5 or less, still more preferably 4 or less, still more preferably 3.5 or less, still more preferably 3 or less, still more preferably 2.5 or less, still more preferably 2 or less, still more preferably 1.5 or less.

[0013] The content of each compound with a sulfonic acid group at a different position in component (A) can be measured using a high-performance liquid chromatography mass spectrometer (hereinafter abbreviated as HPLC-MS). In this specification, the content of each compound with a sulfonic acid group at a different position is determined as a mass ratio based on the HPLC-MS peak area of the compound with a sulfonic acid group at each position in the total HAS of component (A). Here, HAS is a hydroxyalkanesulfonate, that is, a hydroxy form of an internal olefin sulfonate, among the compounds produced by sulfonation of an internal olefin sulfonic acid. In the present invention, an internal olefin sulfonate (IO-1S) having 8 to 24 carbon atoms and in which the sulfonic acid group is located at positions 2 to 4 means a sulfonate having 8 to 24 carbon atoms and in which the sulfonic acid group is located at positions 2 to 4 in an HAS form having 8 to 24 carbon atoms. Furthermore, internal olefin sulfonate (IO-2S) having 8 to 24 carbon atoms and in which a sulfonic acid group is located at the 5th or higher position means a sulfonate having 8 to 24 carbon atoms and in which a sulfonic acid group is located at the 5th or higher position in an HAS form having 8 to 24 carbon atoms.

[0014] The internal olefin sulfonate salt of component (A) is composed of an internal olefin sulfonate salt (IO-1S) having 8 to 24 carbon atoms in which the sulfonic acid group is located at position 2 or higher and 4 or lower, and an internal olefin sulfonate salt (IO-2S) having 8 to 24 carbon atoms in which the sulfonic acid group is located at position 5 or higher. The maximum number of bonding positions of the sulfonic acid groups in the internal olefin sulfonate salt (IO-2S) varies depending on the number of carbon atoms.

[0015] The mass ratio (IO-1S) / (IO-2S) for component (A) is based on the final obtained component (A). For example, even if an internal olefin sulfonate is obtained by mixing internal olefin sulfonates having a mass ratio (IO-1S) / (IO-2S) outside the above range, it is still considered to be an internal olefin sulfonate of component (A) if the mass ratio (IO-1S) / (IO-2S) in the composition of the internal olefin sulfonate is within the above range.

[0016] From the viewpoint of achieving both disinfecting properties and cleaning properties, the content of (IO-1S) in component (A) is preferably 90% by mass or less, more preferably 85% by mass or less, even more preferably 80% by mass or less, and preferably 30% by mass or more, more preferably 40% by mass or more.

[0017] The salt of the internal olefin sulfonate salt (component (A)) may be one or more selected from alkali metal salts, alkaline earth metal (half atom) salts, ammonium salts, and organic ammonium salts. The alkali metal salts are preferably sodium salts and potassium salts, and the organic ammonium salts are preferably alkanolammonium salts having from 1 to 6 carbon atoms.

[0018] The component (A) of the present invention can be obtained, for example, from an internal olefin having 8 to 24 carbon atoms as a raw material, in which the mass ratio (IO-1) of an olefin having 8 to 24 carbon atoms in which a double bond is located at the 1st to 3rd position and an olefin (IO-2) having 8 to 24 carbon atoms in which a double bond is located at the 5th position or higher, (IO-1) / (IO-2), is 0.50 to 6.5. The internal olefins used to obtain component (A) are composed of an olefin (IO-1) having 8 to 24 carbon atoms with a double bond located at position 1 to 3, an olefin (IO-2) having 8 to 24 carbon atoms with a double bond located at position 4, and an olefin (IO-2) having 8 to 24 carbon atoms with a double bond located at position 5 or higher. The maximum position of the double bond in olefin (IO-2) varies depending on the number of carbon atoms.

[0019] In terms of achieving both disinfecting and cleaning properties, the mass ratio (IO-1) / (IO-2) of olefins (IO-1) having 8 to 24 carbon atoms and having a double bond at position 1 to 3 to olefins (IO-2) having 8 to 24 carbon atoms and having a double bond at position 5 or higher is preferably 6.5 or less, more preferably 6 or less, even more preferably 5.5 or less, still more preferably 5 or less, still more preferably 4.5 or less, still more preferably 3 or less, still more preferably 2.5 or less, still more preferably 2 or less, still more preferably 1.5 or less, and preferably 0.50 or more, more preferably 0.55 or more, and still more preferably 0.6 or more.

[0020] The mass ratio (IO-1) / (IO-2) of the internal olefins used to obtain component (A) may be based on the final component (A). For example, even if an internal olefin sulfonate is obtained by mixing internal olefin sulfonates obtained using olefins as raw materials whose mass ratio (IO-1) / (IO-2) is outside the above range, it can be considered to correspond to the internal olefin sulfonate of component (A) obtained using a specified olefin as a raw material, as long as the mass ratio (IO-1) / (IO-2) in the composition of the olefin corresponding to the raw material olefin is within the above range.

[0021] The carbon number of the olefin used as the raw material for component (A) is 8 or more, preferably 12 or more, more preferably 16 or more, from the viewpoint of antibacterial properties, and 22 or less, preferably 20 or less, more preferably 18 or less, and even more preferably 16, from the viewpoint of improving cleaning performance.

[0022] The internal olefins used as raw materials for component (A) include those containing trace amounts of so-called alpha olefins (hereinafter also referred to as α-olefins), in which the double bond is located at position 1 of the carbon chain. From the viewpoints of low-temperature stability, reducing production costs, and improving productivity, the content of alpha olefins in the internal olefins is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and preferably 0.05% by mass or more, more preferably 0.01% by mass or more.

[0023] When internal olefins are sulfonated, β-sultone is quantitatively produced, and a portion of the β-sultone is converted to γ-sultone and olefin sulfonic acid. These are then converted to hydroxyalkanesulfonates and olefin sulfonates during the neutralization and hydrolysis process (e.g., J. Am. Oil Chem. Soc. 69, 39 (1992)). The hydroxy group of the resulting hydroxyalkanesulfonates is located within the alkane chain, while the double bond of the olefin sulfonates is located within the olefin chain. The resulting product is primarily a mixture of these, and some of the product may contain trace amounts of hydroxyalkanesulfonates with a hydroxy group at the end of the carbon chain or olefin sulfonates with a double bond at the end of the carbon chain. In this specification, these products and mixtures thereof are collectively referred to as internal olefin sulfonates (component (A)). Furthermore, hydroxyalkanesulfonates are referred to as hydroxy forms of internal olefin sulfonates (HAS), and olefin sulfonates are referred to as olefin forms of internal olefin sulfonates (hereinafter also referred to as IOS). The mass ratio of the compounds in component (A) can be measured by HPLC-MS. Specifically, the mass ratio can be determined from the HPLC-MS peak area of component (A).

[0024] The distribution of double bonds in the raw internal olefins can be measured, for example, by a gas chromatograph mass spectrometer (hereinafter abbreviated as GC-MS). Specifically, components with different carbon chain lengths and double bond positions are accurately separated using a gas chromatograph analyzer (hereinafter abbreviated as GC), and each is subjected to a mass spectrometer (hereinafter abbreviated as MS), whereby the double bond positions can be identified and the respective proportions can be determined from the GC peak areas. The content of the olefins having double bonds at the specific positions described above is determined from the GC peak areas. Furthermore, when olefins with different carbon numbers are mixed, the double bond position distribution is expressed as the double bond position distribution in olefins with the same carbon number.

[0025] In this specification, when a mixture of multiple internal olefin sulfonates obtained from multiple types of raw material olefins having different double bond positions is used, the position distribution of the double bonds of the olefins serving as raw materials for the internal olefin sulfonate is calculated using olefins having the same number of carbon atoms.

[0026] <(B) component> Component (B) is one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids.

[0027] From the viewpoint of bactericidal activity, component (B) is preferably an organic acid having an acid dissociation constant (pKa) at 25°C (hereinafter also referred to as "pKa(25°C)") of preferably 1 or more, more preferably 1.1 or more, even more preferably 1.2 or more, still more preferably 1.5 or more, still more preferably 2 or more, still more preferably 2.5 or more, still more preferably 3 or more, still more preferably 3.7 or more, and preferably 10 or less, more preferably 9 or less, still more preferably 8 or less, still more preferably 7 or less, still more preferably 6 or less, still more preferably 5.5 or less, and still more preferably 5 or less. When the pH of the disinfectant composition of the present invention is acidic, the (B) component having a pKa value in the above range is preferred because it exhibits high disinfecting activity due to an increase in non-acid-dissociable molecules, which easily penetrate into cells and easily dissociate into acids within bacterial cells. The pKa (25°C) of the component (B) of the present invention indicates the pKa (25°C) of the compound of component (B) at a concentration of 0.1 mol / L when water is used as the solvent. The acid dissociation constant (pKa) can be the pKa at 25°C listed in "Chemical Handbook, Basics, 5th Revised Edition, Compiled by the Chemical Society of Japan" (February 20, 2004, Maruzen Co., Ltd., pp. II-334 to II-343) or Chemicalize (https: / / chemicalize.com / welcome).

[0028] Since component (B) needs to be dissolved in a solvent in order to act on bacteria and exhibit bactericidal properties, its solubility in water at pH 7 (hereinafter also referred to as "solubility (pH 7)") is preferably 0.0001 mg / mL or more, more preferably 0.0002 mg / mL or more, even more preferably 0.0003 mg / mL or more, still more preferably 0.001 mg / mL or more, still more preferably 0.01 mg / mL or more, still more preferably 0.1 mg / mL or more, still more preferably 1 mg / mL or more, still more preferably 10 mg / mL or more, and still more preferably Suitable organic acids are those having a concentration of 100 mg / mL or more, even more preferably 500 mg / mL or more, even more preferably 1000 mg / mL or more, even more preferably 5000 mg / mL or more, even more preferably 10000 mg / mL or more, and preferably 200,000 mg / mL or less, more preferably 190,000 mg / mL or less, even more preferably 180,000 mg / mL or less, even more preferably 150,000 mg / mL or less, even more preferably 100,000 mg / mL or less, and even more preferably 70,000 mg / mL or less. In order for the component (B) of the present invention to easily penetrate into bacterial cells, the component (B) preferably has a solubility (pH 7) within the above range. The solubility (pH 7) in the present invention can be the solubility described on "Chemicalize (https: / / chemicalize.com / welcome)".

[0029] From the viewpoints of water solubility and bactericidal properties, component (B) is preferably an organic acid having a carbon number of preferably 1 or more and preferably 24 or less, more preferably 22 or less, even more preferably 20 or less, still more preferably 18 or less, still more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, still more preferably 10 or less, and still more preferably 8 or less.

[0030] From the viewpoints of water solubility and bactericidal properties, component (B) is preferably an organic acid having a molecular weight of preferably 30 or more, more preferably 35 or more, even more preferably 40 or more, still more preferably 60 or more, still more preferably 80 or more, and preferably 500 or less, more preferably 490 or less, even more preferably 480 or less, still more preferably 400 or less, still more preferably 350 or less, still more preferably 300 or less, still more preferably 250 or less, still more preferably 200 or less.

[0031] From the viewpoints of water solubility, bactericidal properties, and odor, the number of carbon atoms of the monocarboxylic acid is preferably 1 or more, more preferably 6 or more, and preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, still more preferably 10 or less, and still more preferably 8 or less. Monocarboxylic acids include caprylic acid (pKa 4.89, solubility 144 mg / mL, carbon number 8, molecular weight 144), sorbic acid (pKa 4.8, solubility 299 mg / mL, carbon number 6, molecular weight 112), caproic acid (pKa 4.6, solubility 452 mg / mL, carbon number 6, molecular weight 116), propionic acid (pKa 4.62, solubility 12,445 mg / mL, carbon number 3, molecular weight 74), formic acid (pKa 3.54, solubility 40,766 mg / mL, carbon number 1, molecular weight 46), and acetic acid (pKa 4.57, solubility 25,786 mg / mL, carbon number 2, molecular weight 6). 0), benzoic acid (pKa 4.08, solubility 430 mg / mL, number of carbon atoms 7, molecular weight 122), capric acid (pKa 4.95, solubility 5.535 mg / mL, number of carbon atoms 10, molecular weight 172), lauric acid (pKa 4.95, solubility 0.5744 mg / mL, number of carbon atoms 12, molecular weight 200), 2-hexyldecanoic acid (pKa 5.12, solubility 0.0051 mg / mL, number of carbon atoms 16, molecular weight 256), and 2-octyldecanoic acid (pKa 4.98, solubility 0.0007 mg / mL, number of carbon atoms 18, molecular weight 284). The monocarboxylic acids exclude compounds that fall under the category of hydroxy acids. The parentheses indicate the pKa (25°C), solubility (pH 7), carbon number, and molecular weight of each compound, respectively.

[0032] From the viewpoints of water solubility and bactericidal properties, the number of carbon atoms in the hydroxy acid is preferably 2 or more and preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, still more preferably 10 or less, and still more preferably 8 or less. Hydroxy acids include salicylic acid (pKa 2.97, solubility 1173 mg / mL, carbon number 7, molecular weight 138), lactic acid (pKa 3.8, solubility 21268 mg / mL, carbon number 3, molecular weight 90), tartaric acid (pKa 2.87, solubility 37131 mg / mL, carbon number 4, molecular weight 150), malic acid (pKa 3.23, 4.77, 4.5, solubility 38685 mg / mL, carbon number 4, molecular weight 134), and glycolic acid (pKa 3.65, solubility 43556 mg / mL , carbon number 2, molecular weight 76), gluconic acid (pKa 3.86, solubility 126141 mg / mL, carbon number 6, molecular weight 196), citric acid (pKa 2.9, 4.35, 5.69, solubility 47847 mg / mL, carbon number 6, molecular weight 192), gallic acid (pKa 3.94, solubility 8626 mg / mL, carbon number 7, molecular weight 170), and glyceric acid (pKa 3.42, solubility 59557 mg / mL, carbon number 3, molecular weight 106). The parentheses indicate the pKa (25°C), solubility (pH 7), carbon number, and molecular weight of each compound, respectively.

[0033] From the viewpoints of water solubility and bactericidal properties, the number of carbon atoms in the dicarboxylic acid is preferably 2 or more, more preferably 4 or more, and preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, still more preferably 10 or less, and still more preferably 8 or less. Dicarboxylic acids include maleic acid (pKa 1.83, solubility 6642 mg / mL, carbon number 4, molecular weight 116), fumaric acid (pKa 3, solubility 6642 mg / mL, carbon number 4, molecular weight 116), oxalic acid (pKa 1.27, solubility 21764 mg / mL, carbon number 2, molecular weight 90), malonic acid (pKa 2.43, solubility 38974 mg / mL, carbon number 3, molecular weight 104), succinic acid (pKa 4.2, solubility 69013 mg / mL, carbon number 4, molecular weight 118), and glutaric acid (p Examples of suitable carboxylic acids include one or more selected from the group consisting of adipic acid (pKa 4.3, solubility 30673 mg / mL, carbon number 6, molecular weight 146), azelaic acid (pKa 4.15, solubility 689 mg / mL, carbon number 9, molecular weight 188), sebacic acid (pKa 4.6, solubility 222 mg / mL, carbon number 10, molecular weight 202), and glutamic acid (pKa 1.88, solubility 38611 mg / mL, carbon number 5, molecular weight 147). Dicarboxylic acids exclude compounds that fall under the category of hydroxy acids. The parentheses indicate the pKa (25°C), solubility (pH 7), carbon number, and molecular weight of each compound, respectively.

[0034] From the viewpoints of water solubility, antibacterial properties, and odor, component (B) is preferably one or more organic acids selected from caprylic acid, sorbic acid, caproic acid, propionic acid, formic acid, acetic acid, benzoic acid, salicylic acid, lactic acid, tartaric acid, malic acid, glycolic acid, gluconic acid, citric acid, maleic acid, fumaric acid, oxalic acid, adipic acid, glutamic acid, succinic acid, sebacic acid, and azelaic acid, more preferably one or more organic acids selected from caprylic acid, caproic acid, sorbic acid, lactic acid, glycolic acid, gluconic acid, fumaric acid, succinic acid, adipic acid, sebacic acid, and azelaic acid, even more preferably one or more organic acids selected from sorbic acid, lactic acid, succinic acid, glycolic acid, gluconic acid, sebacic acid, and adipic acid, and even more preferably one or more organic acids selected from lactic acid, succinic acid, gluconic acid, and adipic acid.

[0035] <Composition, etc.> From the viewpoint of improving disinfecting properties and cleaning performance, the disinfectant composition of the present invention contains component (A) in an amount of preferably 0.001% by mass or more, more preferably 0.002% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 15% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, and still more preferably 3% by mass or less.

[0036] From the viewpoints of bactericidal activity and water solubility, the bactericidal composition of the present invention contains component (B) in an amount of preferably 0.0001% by mass or more, more preferably 0.0002% by mass or more, even more preferably 0.001% by mass or more, still more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, still more preferably 2% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 1% by mass or less.

[0037] In the disinfectant composition of the present invention, the total content of component (A) and component (B) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of cleaning ability, and is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and still more preferably 5% by mass or less, from the viewpoint of low-temperature stability.

[0038] In the disinfectant composition of the present invention, the mass ratio (B) / (A) of the content of the component (A) to the content of the component (B) is, from the viewpoint of disinfecting activity, preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.02 or more, still more preferably 0.05 or more, still more preferably 0.08 or more, still more preferably 0.1 or more, and is preferably 4 or less, more preferably 3 or less, even more preferably 2 or less, still more preferably 1.5 or less, still more preferably 1 or less, still more preferably 0.8 or less, and still more preferably 0.5 or less.

[0039] From the viewpoint of improving the disinfecting activity, the disinfectant composition of the present invention preferably further contains an organic solvent having a LogP of 0.5 or more and 10 or less as component (C). From the viewpoint of bactericidal activity, the LogP of component (C) is 0.5 or more, preferably 0.8 or more, more preferably 1 or more, and 10 or less, preferably 7 or less, more preferably 5 or less, even more preferably 4 or less, and even more preferably 3 or less. In the present invention, LogP is a calculated value calculated using ChemProperty in ChemBioDrawUltra ver. 14.0 from Perkin Elmer Co. A larger logP value indicates higher hydrophobicity.

[0040] From the viewpoints of water solubility and disinfecting properties, the number of carbon atoms in the organic solvent of component (C) is preferably 2 or more, more preferably 4 or more, even more preferably 6 or more, and preferably 30 or less, more preferably 28 or less, even more preferably 24 or less, still more preferably 20 or less, still more preferably 16 or less, still more preferably 14 or less, and still more preferably 12 or less.

[0041] (C) Ingredients include hexylglycerin (LogP 1.11, carbon number 9), octanediol (LogP 1.68, carbon number 8), hexanol (LogP 1.8, carbon number 6), 2-ethylhexylglyceryl ether (LogP 1.93, carbon number 11), heptanol (LogP 2.22, carbon number 7), decanediol (LogP 2.52, carbon number 10), octanol (LogP 2.64, carbon number 8), glyceryl caprylate (LogP 1.64, carbon number 11), 3-isodecyloxy-1,2-propanediol (LogP 2.69, carbon number 13), hexyldecanol (LogP 5.96, carbon number 11), 2-isodecyloxy-1,2-propanediol (LogP 2.69, carbon number 13), 2-ethylhexylglyceryl ether (LogP 1.93, carbon number 1 ... Examples of suitable organic solvents include one or more organic solvents selected from octanediol, 2-ethylhexylglyceryl ether, glyceryl caprylate, 1-octanol, 3-isodecyloxy-1,2-propanediol, and hexyldecanol, and from the viewpoints of water solubility and disinfecting properties, one or more organic solvents selected from octanediol, 2-ethylhexylglyceryl ether, glyceryl caprylate, and 1-octanol are preferred, and one or more organic solvents selected from octanediol, 2-ethylhexylglyceryl ether, glyceryl caprylate, and 1-octanol are more preferred.

[0042] When the disinfectant composition of the present invention contains component (C), from the viewpoint of disinfecting activity, it preferably contains component (C) in an amount of at least 0.0001% by mass, more preferably at least 0.0002% by mass, even more preferably at least 0.001% by mass, still more preferably at least 0.01% by mass, still more preferably at least 0.1% by mass, still more preferably at least 0.5% by mass, still more preferably at least 1% by mass, and preferably at most 50% by mass, more preferably at most 30% by mass, even more preferably at most 20% by mass, still more preferably at most 15% by mass, still more preferably at most 10% by mass, still more preferably at most 5% by mass, still more preferably at most 3% by mass, and still more preferably at most 2% by mass.

[0043] When the disinfectant composition of the present invention contains component (C), the mass ratio (C) / (A) of the content of component (A) to the content of component (C) is, from the viewpoint of improving disinfecting activity, preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.05 or more, still more preferably 0.1 or more, still more preferably 0.3 or more, and preferably 10 or less, more preferably 5 or less, even more preferably 3 or less, still more preferably 1 or less, and still more preferably 0.7 or less.

[0044] From the viewpoint of improving cleaning performance, the disinfectant composition of the present invention preferably further contains a nonionic surfactant as component (D).

[0045] Examples of the nonionic surfactant of component (D) include polyoxyalkylene alkyl ethers having an alkyl group containing 8 to 18 carbon atoms, polyoxyalkylene alkenyl ethers having an alkenyl group containing 8 to 18 carbon atoms, polyoxyalkylene sorbitan fatty acid esters having a fatty acid group containing 8 to 18 carbon atoms, alkyl glycosides having an alkyl group containing 8 to 18 carbon atoms, alkyl polyglycosides having an alkyl group containing 8 to 18 carbon atoms, sucrose fatty acid esters having a fatty acid group containing 8 to 18 carbon atoms, and alkyl polyglyceryl ethers having an alkyl group containing 8 to 18 carbon atoms, and these may be used alone or in combination. From the viewpoint of achieving both cleaning and disinfecting performance, component (D) is preferably at least one selected from alkyl glycosides having an alkyl group with 8 to 18 carbon atoms, alkyl polyglycosides having an alkyl group with 8 to 18 carbon atoms, polyoxyalkylene alkyl ethers having an alkyl group with 8 to 18 carbon atoms, and polyoxyalkylene alkenyl ethers having an alkenyl group with 8 to 18 carbon atoms, and more preferably at least one selected from compounds represented by the following general formula (D1) and compounds represented by the following general formula (D2):

[0046] The component (D) is preferably a compound represented by the following general formula (D1). R 1d(OR 2d ) x G y (D1) [In the formula, R 1d represents a linear or branched alkyl group having 8 to 18 carbon atoms, and R 2d represents an alkylene group having 2 to 4 carbon atoms, G represents a residue derived from a sugar having 5 or 6 carbon atoms, x represents a number whose average value is 0 to 5, and y represents a number whose average value is 1 to 3.

[0047] In the above general formula (D1), R 1d From the viewpoint of achieving both cleaning performance and sterilizing performance, R is a linear or branched alkyl group having 8 or more, preferably 10 or more, and 18 or less, preferably 16 or less, more preferably 14 or less carbon atoms, and is preferably a linear alkyl group. 2d From the viewpoint of achieving both cleaning performance and sterilizing performance, the alkylene group represented by is preferably one having two carbon atoms. The structure of the residue derived from a sugar having five or six carbon atoms represented by G is determined depending on the monosaccharide or disaccharide or higher sugar used. Examples of G include residues derived from monosaccharides such as glucose, galactose, xylose, mannose, lyxose, arabinose, fructose, or mixtures thereof, and examples of disaccharides or higher sugars include residues derived from maltose, xylobiose, isomaltose, cellobiose, gentiobiose, lactose, sucrose, nigerose, turanose, raffinose, gentianose, menzitose, or mixtures thereof. Of these, preferred raw materials are glucose and fructose for monosaccharides, and maltose and sucrose for disaccharides or higher. In the general formula (D1), x represents OR 2d is the average number of moles added, and is preferably 0 or more, and preferably 5 or less, more preferably 3 or less, further preferably 1 or less, and may also be 0. When the average value of y in the above general formula (D1) is greater than 1, that is, when a sugar chain of disaccharide or more is used as the hydrophilic group, the sugar chain bond type can include 1-2, 1-3, 1-4, 1-6 bond, α-, β-pyranoside bond, furanoside bond, or any mixture of these bond types. The average value of y in the general formula (D1) is 1 or more and 3 or less, preferably 2 or less, and more preferably 1.5 or less. The value of y (average degree of condensation of sugars) is 1 The measurement is performed by H-NMR. For specific measurement methods, see JP-A-8-53696, page 6, column 10, line 26 to page 7, column 11, line 15.

[0048] The component (D) is preferably a compound represented by the following general formula (D2). R 3d -O-[(C2H4O) s (C3H6O) t ]-H (D2) [In the formula, R 3d is a linear or branched alkyl group having 8 to 18 carbon atoms, or a linear or branched alkenyl group having 8 to 18 carbon atoms. s and t are the average number of moles added, s is a number of 1 to 50, and t is a number of 0 to 5, and (C2H4O) and (C3H6O) may be random polymers or block polymers.

[0049] In the above general formula (D2), R 3d From the viewpoint of achieving both cleaning performance and sterilizing performance, the number of carbon atoms in R is 8 or more, preferably 10 or more, and 18 or less, preferably 16 or less, more preferably 14 or less. 3d is a linear or branched alkyl group or a linear or branched alkenyl group, preferably a linear or branched alkyl group. In the above general formula (D2), s is 1 or more, preferably 2 or more, more preferably 3 or more, and 50 or less, preferably 40 or less, more preferably 30 or less, even more preferably 28 or less, and even more preferably 24 or less, from the viewpoint of achieving both cleaning performance and sterilizing performance. In the above general formula (D2), t is 0 or more and 5 or less, preferably 3 or less, more preferably 2 or less, and may be 0, from the viewpoint of achieving both cleaning performance and sterilizing performance.

[0050] When the disinfectant composition of the present invention contains component (D), from the viewpoint of achieving both cleaning performance and disinfecting performance, it preferably contains component (D) in an amount of at least 0.001% by mass, more preferably at least 0.002% by mass, even more preferably at least 0.01% by mass, still more preferably at least 0.05% by mass, still more preferably at least 0.1% by mass, still more preferably at least 0.5% by mass, and preferably at most 50% by mass, more preferably at most 30% by mass, even more preferably at most 10% by mass, still more preferably at most 5% by mass, still more preferably at most 3% by mass, still more preferably at most 1.5% by mass, still more preferably at most 1% by mass, and still more preferably at most 0.8% by mass.

[0051] When the disinfectant composition of the present invention contains component (D), the mass ratio (A) / (D) of the content of component (A) to the content of component (D) is, from the viewpoint of achieving both cleaning performance and disinfecting performance, preferably 0.1 or more, more preferably 0.5 or more, even more preferably 1 or more, still more preferably 2 or more, still more preferably 3 or more, and preferably 10 or less, more preferably 8 or less, and even more preferably 5 or less.

[0052] From the viewpoint of human safety and environmental considerations, the disinfectant composition of the present invention preferably does not contain a disinfectant base, and more preferably does not substantially contain any disinfectant base other than components (A) and (B). That is, the present invention provides a disinfectant composition consisting essentially of component (A), component (B), optionally component (C), optionally component (D), and water. Here, in the fungicide composition of the present invention, "essentially" means that the composition may contain components other than component (A), component (B), component (C), component (D), and water, as long as the components do not affect the action and effect of the present invention, but does not contain any components that affect the action and effect of the present invention, such as fungicide bases other than component (A) and component (B). The antiseptic base may be one or more selected from triclosan, isopropylmethylphenol, parachlorometaxinolair, chlorphenesin, piroctone olamine, benzethonium chloride, benzalkonium chloride, cetylpyridinium chloride, chlorhexidine, and polylysine. In the disinfectant composition of the present invention, the content of disinfectant bases other than components (A) and (B) is preferably 20% by mass or less, more preferably 1% by mass or less, even more preferably 0.1% by mass or less, and even more preferably 0.01% by mass or less, from the viewpoint of improving disinfecting properties while taking into consideration safety for humans and the environment.

[0053] The disinfectant composition of the present invention may optionally contain polymers, fragrances, colorants, preservatives, antioxidants, etc., within the scope of not affecting the action and effect of the present invention and in order to increase the added value of the product (however, excluding the above-mentioned components (A) to (D)).

[0054] The disinfectant composition of the present invention contains water. That is, the remainder other than the components (A) to (D) and any optional components is water. The disinfectant composition of the present invention contains water in an amount of preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 50% by mass or more, and preferably 99% by mass or less, more preferably 98% by mass or less. The water used is preferably ion-exchanged water, sterilized ion-exchanged water, etc.

[0055] The pH of the disinfectant composition of the present invention at 20°C is preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, and preferably 7 or less, more preferably 6.5 or less, even more preferably 6 or less, still more preferably 5.5 or less, even more preferably 5 or less, and even more preferably 4.5 or less, from the viewpoints of disinfecting activity and corrosiveness to humans and the surface to be cleaned.

[0056] The fungicide composition of the present invention can be suitably used on hard surfaces, such as bathrooms, bathtubs, washbasins, tiles, restrooms, washstands, mirrors, kitchen sinks, countertops, areas around water supplies, furniture, and home appliances. The fungicide composition of the present invention can be suitably used for textile products. Examples of textile products include clothing, towels, bedding, and textile products for bedding (sheets, pillowcases, etc.). Other washable textile products can also be used. The disinfectant composition of the present invention can be suitably used for skin cleansing, for example, as a cleanser for hands such as hand soap, body shampoo, and hair shampoo.

[0057] The fungi that can be targeted by the fungicide composition of the present invention include yeasts such as those of the genera Saccharomyces, Rhodotorula, Pichia, and Candida, molds such as those of the genera Cladosporium, Phoma, and Exophiala, bacteria of the genus Escherichia such as Escherichia coli, bacteria of the genus Pseudomonas such as Pseudomonas aeruginosa and Pseudomonas putida, and bacteria of the genus Serratia marcescens. Serratia bacteria such as Serratia amarcescens, Burkholderia bacteria such as Burkholderia cepacia, Klebsiella bacteria such as Klebsiella pneumoniae and Klebsiella oxytoca, Enterobacter bacteria such as Enterobacter cloacae, Alcaligenes faecalis Gram-negative bacteria, including food poisoning bacteria such as Alcaligenes bacteria such as Alcaligenes faecalis, Providencia bacteria such as Providencia rettgeri, Methylobacterium bacteria, and Salmonella bacteria, as well as Gram-positive bacteria, such as Staphylococcus bacteria such as Staphylococcus aureus and Staphylococcus saprophyticus, and Enterococcus bacteria such as Enterococcus faecalis. Among these, the disinfectant composition of the present invention exhibits excellent bactericidal effect, particularly against Escherichia coli and Staphylococcus aureus.

[0058] [Sterilization method] The present invention provides a sterilization method comprising contacting an object containing bacteria with the sterilizing composition of the present invention, either as an undiluted solution or as a treatment solution diluted with water. The disinfection method of the present invention can be appropriately applied with the matters described in relation to the disinfectant composition of the present invention.

[0059] In the sterilization method of the present invention, the disinfectant composition of the present invention is brought into contact with an object on which bacteria are present. Specifically, a preferred sterilization method is to bring the disinfectant composition in its undiluted form into contact with the object on which bacteria are present, or to bring a treatment solution obtained by diluting the disinfectant composition with water (hereinafter also referred to as the treatment solution of the present invention) into contact with the object on which bacteria are present.

[0060] In preparing the treatment solution of the present invention, the water used to dilute the disinfectant composition of the present invention is generally assumed to be water containing hardness components, such as tap water. From the viewpoint of exhibiting disinfecting activity, the hardness of the water used for dilution is preferably 20° dH or less, more preferably 10° dH or less, and 0° dH or more.

[0061] From the viewpoint of achieving both cleaning performance and sterilizing performance, the treatment liquid of the present invention contains component (A) in an amount of preferably 0.0003% by mass or more, more preferably 0.0005% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, still more preferably 3% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 1% by mass or less.

[0062] From the viewpoint of sterilizing performance, the treatment liquid of the present invention contains component (B) in an amount of preferably 0.00003 mass% or more, more preferably 0.00006 mass% or more, even more preferably 0.0003 mass% or more, still more preferably 0.003 mass% or more, still more preferably 0.03 mass% or more, still more preferably 0.06 mass% or more, and preferably 3 mass% or less, more preferably 1.5 mass% or less, even more preferably 1 mass% or less, and still more preferably 0.5 mass% or less.

[0063] The treatment liquid of the present invention optionally contains, from the viewpoint of sterilizing performance, component (C), preferably at least 0.00003 mass%, more preferably at least 0.00006 mass%, even more preferably at least 0.0003 mass%, still more preferably at least 0.003 mass%, still more preferably at least 0.03 mass%, still more preferably at least 0.15 mass%, still more preferably at least 0.3 mass%, and preferably at most 15 mass%, more preferably at most 10 mass%, even more preferably at most 5 mass%, still more preferably at most 4 mass%, still more preferably at most 3 mass%, still more preferably at most 2 mass%, still more preferably at most 1 mass%, and still more preferably at most 0.5 mass%.

[0064] From the viewpoint of achieving both cleaning performance and sterilizing performance, the treatment liquid of the present invention optionally contains component (D) in an amount of preferably 0.0003% by mass or more, more preferably 0.0006% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.0015% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.15% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 3% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less.

[0065] In the treatment solution of the present invention, the content of the disinfectant base other than the components (A) and (B) is preferably 6% by mass or less, more preferably 0.3% by mass or less, even more preferably 0.03% by mass or less, and even more preferably 0.003% by mass or less, from the viewpoint of improving disinfecting properties while taking into consideration safety for humans and the environment.

[0066] In the treatment solution of the present invention, the ranges of the mass ratios (B) / (A), (C) / (A), and (A) / (D) are the same as those described above for the disinfectant composition of the present invention.

[0067] In the sterilization method of the present invention, the sterilizing composition of the present invention or the treatment solution of the present invention is applied to an area of 100 cm 2 of the target object.2 It is preferable to bring the solution into contact with the surface of the object, and further to apply or spray the solution, at a ratio of preferably 0.1 g or more, more preferably 0.2 g or more, even more preferably 1 g or more, and preferably 50 g or less, more preferably 20 g or less, even more preferably 10 g or less, relative to the surface of the object.

[0068] In the sterilization method of the present invention, from the viewpoint of enhancing the sterilization effect, the disinfectant composition of the present invention or the treatment solution of the present invention is allowed to stand for preferably 30 seconds or more, more preferably 60 seconds or more, even more preferably 3 minutes or more, and preferably 60 minutes or less, more preferably 50 minutes or less, even more preferably 30 minutes or less after contacting the object. In this case, the time when the composition or treatment solution first comes into contact with the object may be considered the start of the standing period. The temperature during storage may be room temperature, for example, 10°C or higher and 30°C or lower.

[0069] In the sterilization method of the present invention, an object on which bacteria are present may be immersed in the disinfectant composition or treatment liquid of the present invention to bring it into contact with the object. However, from the viewpoint of efficiently enhancing the disinfecting effect, a method in which the disinfectant composition or treatment liquid of the present invention is sprayed or applied to bring it into contact with the object on which bacteria are present is preferred. The method for contacting the disinfectant composition or treatment liquid of the present invention with an object containing bacteria is preferably spraying or application, and more preferably spraying in the form of droplets or applying in the form of foam. Specifically, a spray means is used. That is, it is preferable to use a disinfectant article in which the disinfectant composition or treatment liquid of the present invention is filled in a container equipped with a sprayer. The present invention provides a disinfectant article in a spray container in which the disinfectant composition or treatment liquid of the present invention is filled in a container equipped with a sprayer.

[0070] In the spray-container disinfectant article of the present invention, the container equipped with a sprayer that is filled with the disinfectant composition or treatment liquid of the present invention can be a trigger-type spray container, a manual spray device that does not use a propellant such as a pump-type spray container, an aerosol that uses a propellant, etc. The container equipped with the sprayer is preferably a trigger-type spray that can spray or apply the contents in the form of droplets or foam, and more preferably a trigger-type spray equipped with a mechanism for spraying the contents in the form of droplets or a mechanism for forming foam (foam-forming mechanism).

[0071] The sterilization method of the present invention is directed to an object where bacteria are present, preferably a hard surface, textile product, or skin, more preferably a hard surface. The hard surfaces, textile products, and skins targeted by the disinfection method of the present invention include those described in the disinfectant composition of the present invention.

[0072] The sterilization method of the present invention is effective against Escherichia coli and Staphylococcus aureus, preferably Escherichia coli, as well as against Staphylococcus aureus, among others.

[0073] Preferred embodiments of the fungicide composition of the present invention are shown below. One embodiment of the present invention is a disinfectant composition comprising (A) an internal olefin sulfonate salt having from 16 to 18 carbon atoms, (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids, the organic acids having an acid dissociation constant at 25°C of from 3.7 to 9, and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is from 0.05 to 1. Another aspect of the present invention is a disinfectant composition having a pH of 3 to 5 at 20°C, comprising: (A) an internal olefin sulfonate salt having from 16 to 18 carbon atoms; (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids, the organic acids having an acid dissociation constant at 25°C of from 3.7 to 9; and water. Another aspect of the present invention is a disinfectant composition comprising: (A) an internal olefin sulfonate salt having from 16 to 18 carbon atoms; (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids, the organic acids having an acid dissociation constant at 25°C of from 3.7 to 9; (C) an organic solvent having a LogP of from 0.5 to 10; and water, wherein the mass ratio (C) / (A) of the content of component (A) to the content of component (C) is from 0.3 to 0.7. Another aspect of the present invention is a disinfectant composition comprising: (A) an internal olefin sulfonate salt having from 16 to 18 carbon atoms; (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids, the organic acids having an acid dissociation constant at 25°C of from 3.7 to 9; (C) an organic solvent having a LogP of from 0.5 to 10; (D) a nonionic surfactant; and water, wherein the mass ratio (A) / (D) of the content of the component (A) to the content of the component (D) is from 3 to 5.

[0074] In relation to the above-mentioned embodiments, the present invention further discloses the following disinfectant composition and disinfection method. The matters described in relation to the disinfectant composition and disinfection method of the present invention can be applied to these aspects as appropriate.

[0075] <1> A disinfectant composition comprising: (A) an internal olefin sulfonate having from 8 to 24 carbon atoms (hereinafter referred to as component (A)); (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids (hereinafter referred to as component (B)); and water.

[0076] <2> Further, the composition contains, as component (C), an organic solvent having a LogP of 0.5 or more and 10 or less. <1> The fungicide composition according to claim 1.

[0077] <3> Further, a nonionic surfactant is contained as component (D), <1> or <2> The fungicide composition according to claim 1.

[0078] <4> A disinfectant composition consisting essentially of (A) an internal olefin sulfonate salt having from 8 to 24 carbon atoms (hereinafter referred to as component (A)), (B) one or more organic acids selected from monocarboxylic acids, hydroxy acids, and dicarboxylic acids (hereinafter referred to as component (B)), optionally (C) an organic solvent having a LogP of from 0.5 to 10 (hereinafter referred to as component (C)), optionally (D) a nonionic surfactant (hereinafter referred to as component (D)), and water.

[0079] <5> The number of carbon atoms in component (A) is preferably 12 or more, more preferably 16 or more, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, and still more preferably 16. <1> ~ <4> The disinfectant composition according to any one of the above.

[0080] <6> Component (A) comprises an internal olefin sulfonate (IO-1S) having 8 to 24 carbon atoms and in which a sulfonic acid group is located at position 2 or higher and in which a sulfonic acid group is located at position 4 or higher, and an internal olefin sulfonate (IO-2S) having 8 to 24 carbon atoms and in which a sulfonic acid group is located at position 5 or higher, and the mass ratio of (IO-1S) to (IO-2S), (IO-1S) / (IO-2S), is 0.5 to 6.5. <1> ~ <5> The disinfectant composition according to any one of the above.

[0081] <7> The mass ratio of the (IO-1S) content to the (IO-2S) content in component (A), (IO-1S) / (IO-2S), is preferably 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, still more preferably 0.8 or more, still more preferably 1 or more, and is preferably 6.5 or less, more preferably 6 or less, still more preferably 5.5 or less, still more preferably 5 or less, still more preferably 4.5 or less, still more preferably 4 or less, still more preferably 3.5 or less, still more preferably 3 or less, still more preferably 2.5 or less, still more preferably 2 or less, still more preferably 1.5 or less. <6> The fungicide composition according to claim 1.

[0082] <8> The content of (IO-1S) in the component (A) is preferably 90% by mass or less, more preferably 85% by mass or less, even more preferably 80% by mass or less, and is preferably 30% by mass or more, more preferably 40% by mass or more. <6> or <7> The fungicide composition according to claim 1.

[0083] <9> The salt of component (A) is at least one selected from alkali metal salts, alkaline earth metal (half atom) salts, ammonium salts, and organic ammonium salts, and is preferably at least one selected from sodium salts, potassium salts, and alkanolammonium salts having from 1 to 6 carbon atoms; <1> ~ <8> The fungicide composition according to any one of the above.

[0084] <10> The component (A) is an internal olefin sulfonate obtainable from an internal olefin having from 8 to 24 carbon atoms as a raw material, wherein the mass ratio (IO-1) of an olefin having from 8 to 24 carbon atoms and having a double bond at the 1st to 3rd position and an olefin having from 8 to 24 carbon atoms and having a double bond at the 5th position or higher (IO-2), (IO-1) / (IO-2), is from 0.50 to 6.5. <1> ~ <9> The fungicide composition according to any one of the above.

[0085] <11> Among the internal olefins having from 8 to 24 carbon atoms, which are the raw materials for component (A), the mass ratio (IO-1) / (IO-2) of the olefins having from 8 to 24 carbon atoms and having a double bond at the 1st to 3rd position (IO-1) to the olefins having from 8 to 24 carbon atoms and having a double bond at the 5th position or higher (IO-2) is preferably 6.5 or less, more preferably 6 or less, even more preferably 5.5 or less, still more preferably 5 or less, still more preferably 4.5 or less, still more preferably 3 or less, still more preferably 2.5 or less, still more preferably 2 or less, still more preferably 1.5 or less, and preferably 0.50 or more, more preferably 0.55 or more, even more preferably 0.6 or more. <10> The fungicide composition according to claim 1.

[0086] <12> In the raw material for component (A), the carbon number of the olefin is preferably 12 or more, more preferably 16 or more, and preferably 20 or less, more preferably 18 or less, and even more preferably 16. <10> or <11> The fungicide composition according to claim 1.

[0087] <13> The content of alpha olefins in the internal olefins used as the raw material for component (A) is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and preferably 0.05% by mass or more, more preferably 0.01% by mass or more. <10> ~ <12> The disinfectant composition according to any one of the above.

[0088] <14> Component (B) is an organic acid having an acid dissociation constant (pKa) at 25°C of preferably 1 or more, more preferably 1.1 or more, even more preferably 1.2 or more, still more preferably 1.5 or more, even more preferably 2 or more, even more preferably 2.5 or more, even more preferably 3 or more, even more preferably 3.7 or more, and preferably 10 or less, more preferably 9 or less, even more preferably 8 or less, even more preferably 7 or less, even more preferably 6 or less, even more preferably 5.5 or less, and even more preferably 5 or less. <1> ~ <13> The disinfectant composition according to any one of the above.

[0089] <15> The solubility of component (B) in water at pH 7 is preferably 0.0001 mg / mL or more, more preferably 0.0002 mg / mL or more, even more preferably 0.0003 mg / mL or more, still more preferably 0.001 mg / mL or more, even more preferably 0.01 mg / mL or more, still more preferably 0.1 mg / mL or more, still more preferably 1 mg / mL or more, still more preferably 10 mg / mL or more, still more preferably 100 mg / mL or more, still more preferably 500 mg / mL or more. and preferably 200,000 mg / mL or less, more preferably 190,000 mg / mL or less, even more preferably 180,000 mg / mL or less, even more preferably 150,000 mg / mL or less, even more preferably 100,000 mg / mL or less, and even more preferably 70,000 mg / mL or less. <1> ~ <14> The fungicide composition according to any one of the above.

[0090] <16> The component (B) is an organic acid having a carbon number of preferably 1 or more and preferably 24 or less, more preferably 22 or less, even more preferably 20 or less, still more preferably 18 or less, even more preferably 16 or less, even more preferably 14 or less, even more preferably 12 or less, even more preferably 10 or less, and even more preferably 8 or less. <1> ~ <15> The fungicide composition according to any one of the above.

[0091] <17> The component (B) is an organic acid having a molecular weight of preferably 30 or more, more preferably 35 or more, even more preferably 40 or more, still more preferably 60 or more, still more preferably 80 or more, and preferably 500 or less, more preferably 490 or less, even more preferably 480 or less, still more preferably 400 or less, still more preferably 350 or less, still more preferably 300 or less, still more preferably 250 or less, still more preferably 200 or less. <1> ~ <16> The fungicide composition according to any one of the above.

[0092] <18> The component (B) is one or more organic acids selected from caprylic acid, sorbic acid, caproic acid, propionic acid, formic acid, acetic acid, benzoic acid, salicylic acid, lactic acid, tartaric acid, malic acid, glycolic acid, gluconic acid, citric acid, maleic acid, fumaric acid, oxalic acid, adipic acid, glutamic acid, succinic acid, sebacic acid, and azelaic acid, preferably one or more organic acids selected from caprylic acid, caproic acid, sorbic acid, lactic acid, glycolic acid, gluconic acid, fumaric acid, succinic acid, adipic acid, sebacic acid, and azelaic acid, more preferably one or more organic acids selected from sorbic acid, lactic acid, succinic acid, glycolic acid, gluconic acid, sebacic acid, and adipic acid, and even more preferably one or more organic acids selected from lactic acid, succinic acid, gluconic acid, and adipic acid. <1> ~ <17> The fungicide composition according to any one of the above.

[0093] <19> The content of component (A) is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and preferably 50% by mass or less, more preferably 30% by mass or less, still more preferably 15% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, and still more preferably 3% by mass or less. <1> ~ <18> The fungicide composition according to any one of the above.

[0094] <20> The content of component (B) is preferably 0.0001% by mass or more, more preferably 0.0002% by mass or more, even more preferably 0.001% by mass or more, still more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, still more preferably 2% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 1% by mass or less, <1> ~ <19> The fungicide composition according to any one of the above.

[0095] <21> The total content of the (A) component and the (B) component is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, and still more preferably 5% by mass or less. <1> ~ <20> The fungicide composition according to any one of the above.

[0096] <22> The mass ratio (B) / (A) of the content of the component (A) to the content of the component (B) is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.02 or more, still more preferably 0.05 or more, still more preferably 0.08 or more, still more preferably 0.1 or more, and is preferably 4 or less, more preferably 3 or less, even more preferably 2 or less, still more preferably 1.5 or less, still more preferably 1 or less, still more preferably 0.8 or less, still more preferably 0.5 or less. <1> ~ <21> The fungicide composition according to any one of the above.

[0097] <23> The component (C) is an organic solvent having a LogP of preferably 0.8 or more, more preferably 1 or more, and preferably 7 or less, more preferably 5 or less, even more preferably 4 or less, and still more preferably 3 or less. <2> ~ <22> The fungicide composition according to any one of the above.

[0098] <24> The component (C) is an organic solvent having a carbon number of preferably 2 or more, more preferably 4 or more, even more preferably 6 or more, and preferably 30 or less, more preferably 28 or less, even more preferably 24 or less, still more preferably 20 or less, still more preferably 16 or less, still more preferably 14 or less, and still more preferably 12 or less. <2> ~ <23> The fungicide composition according to any one of the above.

[0099] <25> The component (C) is one or more organic solvents selected from hexylglycerin, octanediol, hexanol, 2-ethylhexylglyceryl ether, heptanol, decanediol, octanol, glyceryl caprylate, 3-isodecyloxy-1,2-propanediol, hexyldecanol, octyldodecanol, and decyltetradecanol, preferably one or more organic solvents selected from octanediol, 2-ethylhexylglyceryl ether, glyceryl caprylate, 1-octanol, 3-isodecyloxy-1,2-propanediol, and hexyldecanol, and more preferably one or more organic solvents selected from octanediol, 2-ethylhexylglyceryl ether, glyceryl caprylate, and 1-octanol. <2> ~ <24> The disinfectant composition according to any one of the above.

[0100] <26> The content of component (C) is preferably 0.0001% by mass or more, more preferably 0.0002% by mass or more, even more preferably 0.001% by mass or more, still more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1% 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, still more preferably 15% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 3% by mass or less, and still more preferably 2% by mass or less, <2> ~ <25> The disinfectant composition according to any one of the above.

[0101] <27> The mass ratio (C) / (A) of the content of the component (A) to the content of the component (C) is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.05 or more, still more preferably 0.1 or more, still more preferably 0.3 or more, and is preferably 10 or less, more preferably 5 or less, even more preferably 3 or less, still more preferably 1 or less, and still more preferably 0.7 or less. <2> ~ <26> The disinfectant composition according to any one of the above.

[0102] <28> The component (D) is one or more selected from polyoxyalkylene alkyl ethers having an alkyl group containing 8 to 18 carbon atoms, polyoxyalkylene alkenyl ethers having an alkenyl group containing 8 to 18 carbon atoms, polyoxyalkylene sorbitan fatty acid esters having a fatty acid group containing 8 to 18 carbon atoms, alkyl glycosides having an alkyl group containing 8 to 18 carbon atoms, alkyl polyglycosides having an alkyl group containing 8 to 18 carbon atoms, sucrose fatty acid esters having a fatty acid group containing 8 to 18 carbon atoms, and alkyl polyglyceryl ethers having an alkyl group containing 8 to 18 carbon atoms, <3> ~ <27> The disinfectant composition according to any one of the above.

[0103] <29> The component (D) contains a compound represented by the following general formula (D1): <3> ~ <28> The disinfectant composition according to any one of the above. R 1d (OR 2d ) x G y (D1) [In the formula, R 1d represents a linear or branched alkyl group having 8 to 18 carbon atoms, and R 2d represents an alkylene group having 2 to 4 carbon atoms, G represents a residue derived from a sugar having 5 or 6 carbon atoms, x represents a number whose average value is 0 to 5, and y represents a number whose average value is 1 to 3.

[0104] <30> The component (D) contains a compound represented by the following general formula (D2): <3> ~ <29> The disinfectant composition according to any one of the above. R 3d -O-[(C2H4O) s (C3H6O) t ]-H (D2) [In the formula, R 3dis a linear or branched alkyl group having 8 to 18 carbon atoms, or a linear or branched alkenyl group having 8 to 18 carbon atoms. s and t are the average number of moles added, s is a number of 1 to 50, and t is a number of 0 to 5, and (C2H4O) and (C3H6O) may be random polymers or block polymers.

[0105] <31> The content of component (D) is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, and preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 3% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.8% by mass or less. <3> ~ <30> The disinfectant composition according to any one of the above.

[0106] <32> The mass ratio (A) / (D) of the content of the component (A) to the content of the component (D) is preferably 0.1 or more, more preferably 0.5 or more, even more preferably 1 or more, still more preferably 2 or more, still more preferably 3 or more, and is preferably 10 or less, more preferably 8 or less, even more preferably 5 or less. <3> ~ <31> The disinfectant composition according to any one of the above.

[0107] <33> The water content is preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, and even more preferably 50% by mass or more, and preferably 99% by mass or less, more preferably 98% by mass or less. <1> ~ <32> The disinfectant composition according to any one of the above.

[0108] <34> The pH at 20°C is preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, and preferably 7 or less, more preferably 6.5 or less, even more preferably 6 or less, even more preferably 5.5 or less, even more preferably 5 or less, even more preferably 4.5 or less. <1> ~ <33> The fungicide composition according to any one of the above.

[0109] <35> For hard surfaces, preferably selected from bathrooms, bathtubs, washbasins, tiles, restrooms, vanities, mirrors, kitchen sinks, countertops, plumbing, furniture, and appliances; <1> ~ <34> The fungicide composition according to any one of the above.

[0110] <36> It is for textile products, preferably for textile products selected from clothing, towels, bedding, and textile products for bedding (sheets, pillowcases, etc.), <1> ~ <34> The fungicide composition according to any one of the above.

[0111] <37> For cleansing skin, preferably for cleansing skin selected from hands, body, and hair; <1> ~ <34> The fungicide composition according to any one of the above.

[0112] <38> The target bacteria include yeasts such as Saccharomyces, Rhodotorula, Pichia, and Candida, molds such as Cladosporium, Phoma, and Exophiala, bacteria of the Escherichia genus such as Escherichia coli, bacteria of the Pseudomonas genus such as Pseudomonas aeruginosa and Pseudomonas putida, bacteria of the Serratia genus such as Serratia marcescens, and bacteria of the Burkholderia cepacia. Gram-negative bacteria, including food poisoning bacteria such as Burkholderia bacteria such as Klebsiella cepacia, Klebsiella bacteria such as Klebsiella pneumoniae and Klebsiella oxytoca, Enterobacter bacteria such as Enterobacter cloacae, Alcaligenes bacteria such as Alcaligenes faecalis, Providencia bacteria such as Providenciarettgeri, Methylobacterium bacteria, and Salmonella bacteria, Staphylococcus aureus, Staphylococcus saporiophyticus, The bacterium is selected from Gram-positive bacteria represented by Staphylococcus bacteria such as Staphylococcus saprophyticus and Enterococcus bacteria such as Enterococcus faecalis, and is preferably Escherichia coli.coli) and Staphylococcus aureus, <1> ~ <37> The fungicide composition according to any one of the above.

[0113] <39> <1> ~ <38> 1. A sterilization method comprising contacting an object containing bacteria with the sterilizing composition according to any one of the above items 1 to 3 in its undiluted form or as a treatment solution diluted with water.

[0114] <40> The hardness of the water used to dilute the disinfectant composition is preferably 20° dH or less, more preferably 10° dH or less, and 0° dH or more. <39> The sterilization method described in

[0115] <41> the treatment liquid contains the component (A) in an amount of preferably 0.0003% by mass or more, more preferably 0.0005% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 3% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 1% by mass or less; <39> or <40> The sterilization method described in

[0116] <42> the treatment liquid contains the component (B) in an amount of preferably 0.00003% by mass or more, more preferably 0.00006% by mass or more, even more preferably 0.0003% by mass or more, still more preferably 0.003% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.06% by mass or more, and preferably 3% by mass or less, more preferably 1.5% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.5% by mass or less; <39> ~ <41> The sterilization method according to any one of the above.

[0117] <43> the treatment liquid optionally contains component (C) in an amount of preferably 0.00003% by mass or more, more preferably 0.00006% by mass or more, even more preferably 0.0003% by mass or more, still more preferably 0.003% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.15% by mass or more, still more preferably 0.3% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 4% by mass or less, still more preferably 3% by mass or less, still more preferably 2% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.5% by mass or less; <39> ~ <42> The sterilization method according to any one of the above.

[0118] <44> the treatment liquid optionally contains component (D) in an amount of preferably 0.0003% by mass or more, more preferably 0.0006% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.0015% by mass or more, still more preferably 0.03% by mass or more, still more preferably 0.15% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 3% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less, <39> ~ <43> The sterilization method according to any one of the above.

[0119] <45> In the treatment solution, the content of sterilization bases other than the (A) component and the (B) component is preferably 6% by mass or less, more preferably 0.3% by mass or less, even more preferably 0.03% by mass or less, and even more preferably 0.003% by mass or less. <39> ~ <44> The sterilization method according to any one of the above.

[0120] <46> The disinfectant composition or the treatment solution is applied to an object having an area of 100 cm 2and preferably 0.1 g or more, more preferably 0.2 g or more, even more preferably 1 g or more, and preferably 50 g or less, more preferably 20 g or less, even more preferably 10 g or less, <39> ~ <45> The sterilization method according to any one of the above.

[0121] <47> After contacting the disinfectant composition or the treatment solution with the object, the disinfectant composition or the treatment solution is left for preferably 30 seconds or more, more preferably 60 seconds or more, even more preferably 3 minutes or more, and preferably 60 minutes or less, more preferably 50 minutes or less, even more preferably 30 minutes or less. <39> ~ <46> The sterilization method according to any one of the above.

[0122] Example The disinfectant compositions shown in Tables 1 to 3 were prepared using the ingredients listed below, and the following items were evaluated. The results are shown in Tables 1 to 3. For the cleaning compositions in Tables 1 and 2, ingredients (A) to (D) were added in the amounts shown in the tables and dissolved at room temperature (25°C). After blending, the pH was adjusted to the values shown in Tables 1 to 3 using sodium hydroxide. The pH was measured by the glass electrode method. The mass % of the ingredients in Tables 1 to 3 is all based on the active ingredient.

[0123] <Composition ingredients> Component (A) C16IOS-K: Potassium internal olefin sulfonate obtained in Production Example 1 below C18IOS-K: Potassium internal olefin sulfonate obtained in Production Example 2 below

[0124] [Example of production of raw material for component (A): Example of production of internal olefin having 16 carbon atoms] A flask equipped with a stirrer was charged with 7000 g (28.9 mol) of 1-hexadecanol (product name: Kalcol 6098, manufactured by Kao Corporation) and 700 g (10% by mass based on the raw material alcohol) of γ-alumina (STREM Chemicals, Inc.) as a solid acid catalyst. The reaction was carried out at 280°C under stirring while circulating nitrogen (7000 mL / min) through the system, adjusting the reaction time accordingly. The obtained crude internal olefin was transferred to a distillation flask and distilled at 148-158°C / 0.5 mmHg to obtain an internal olefin having 16 carbon atoms and an olefin purity of 100%. The double bond distribution of the obtained internal olefin is shown below. The double bond distribution (mass %) in the internal olefin was 1st / 2nd / 3rd / 4th / 5th / 6th / 7th / 8th=1.87 / 21.01 / 18.20 / 18.72 / 14.78 / 12.15 / 6.64 / 6.64.

[0125] The double bond distribution of the internal olefin was determined by the method described above. In the case of olefins with 16 carbon atoms, internal olefins with a double bond at the 7th position and internal olefins with a double bond at the 8th position cannot be distinguished structurally, but they can be distinguished when sulfonated. For convenience, the amount of internal olefins with a double bond at the 7th position divided by 2 is shown in the columns for the 7th and 8th positions, respectively.

[0126] [Production Example 1: Production example of potassium internal olefin sulfonate having 16 carbon atoms] The internal olefin obtained in the above-mentioned Raw Material Production Example was sulfonated in a thin-film sulfonation reactor equipped with an external jacket by passing sulfur trioxide gas and cooling water at 20°C through the reactor's external jacket. The molar ratio of SO3 / internal olefin during the sulfonation reaction was set to 1.09. The resulting sulfonated product was added to an alkaline aqueous solution prepared with 1.5 molar equivalents of potassium hydroxide relative to the theoretical acid value, and neutralized at 30°C for 1 hour with stirring. The neutralized product was heated in an autoclave at 160°C for 1 hour to hydrolyze the product, yielding potassium internal olefin sulfonate (A-1). The content (mass%) of internal olefin sulfonates with sulfonic acid groups bonded to them was shown below. The ratios of 1st / 2nd / 3rd / 4th / 5th-9th positions were 1.69 / 17.51 / 15.65 / 20.28 / 44.97. (IO-1S) / (IO-2S) was 1.19. In (A-1), the mass of potassium ions per 100 g of the acid form of internal olefin sulfonic acid was 12.8 g.

[0127] [Example of production of raw material for component (A): Example of production of internal olefin having 18 carbon atoms] A flask equipped with a stirrer was charged with 7000 g (25.9 mol) of 1-octadecanol (product name: Kalcol 8098, manufactured by Kao Corporation) and 700 g (10% by mass based on the raw material alcohol) of γ-alumina (STREM Chemicals, Inc.) as a solid acid catalyst. The reaction was carried out at 280°C with stirring while circulating nitrogen (7000 mL / min) through the system, adjusting the reaction time accordingly. The obtained crude internal olefin was transferred to a distillation flask and distilled at 148-158°C / 0.5 mmHg to obtain an internal olefin with a carbon number of 18 and an olefin purity of 100%. The double bond distribution of the obtained internal olefin is shown below. The double bond distribution (mass %) in the internal olefin was 1.48 / 25.99 / 21.17 / 17.73 / 11.86 / 8.43 / 5.95 / 3.70 / 3.70 at positions 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9.

[0128] The double bond distribution of the internal olefin was determined by the method described above. In the case of olefins with 18 carbon atoms, internal olefins with a double bond at the 8th position and internal olefins with a double bond at the 9th position cannot be distinguished structurally, but they can be distinguished when sulfonated. For convenience, the amount of internal olefins with a double bond at the 8th position divided by 2 is shown in the columns for the 8th and 9th positions, respectively.

[0129] [Production Example 2: Production example of potassium internal olefin sulfonate having 18 carbon atoms] The internal olefin obtained in the above-mentioned Raw Material Production Example was sulfonated in a thin-film sulfonation reactor equipped with an external jacket by passing sulfur trioxide gas and cooling water at 20°C through the reactor's external jacket. The molar ratio of SO3 / internal olefin during the sulfonation reaction was set to 1.09. The resulting sulfonated product was added to an alkaline aqueous solution prepared with 1.5 molar equivalents of potassium hydroxide relative to the theoretical acid value, and neutralized at 30°C for 1 hour with stirring. The neutralized product was heated in an autoclave at 160°C for 1 hour to hydrolyze the product, yielding potassium internal olefin sulfonate (A-2). The content (mass%) of internal olefin sulfonates with sulfonic acid groups bonded to them was shown below. The ratios (1 / 2 / 3 / 4 / 5-9) were 1.37 / 20.67 / 17.43 / 20.95 / 39.57. (IO-1S) / (IO-2S) was 1.49. In (A-2), the mass of potassium ions per 100 g of the acid form of internal olefin sulfonic acid was 12.8 g.

[0130] Component (A') (comparison example of component (A)) ES(3): Polyoxyethylene(3) alkyl ether sodium sulfate, Emal 327, manufactured by Kao Corporation

[0131] (B) Component Adipic acid: pKa (25°C) 4.3, solubility (pH 7) 30673 mg / mL, carbon number 6, molecular weight 146, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Succinic acid: pKa (25°C) 4.3, solubility (pH 7) 69013 mg / mL, carbon number 4, molecular weight 118, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Azelaic acid: pKa (25°C) 4.15, solubility (pH 7) 689 mg / mL, carbon number 9, molecular weight 188, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Gluconic acid: pKa (25°C) 3.86, solubility (pH 7) 126141 mg / mL, carbon number 6, molecular weight 196, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Sorbic acid: pKa (25°C) 4.8, solubility (pH 7) 299 mg / mL, carbon number 6, molecular weight 112, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Lactic acid: pKa (25°C) 3.8, solubility (pH 7) 21268 mg / mL, carbon number 3, molecular weight 90, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Component (B') (comparison component of component (B)) Hydrochloric acid: Fujifilm Wako Pure Chemical Industries, Ltd.

[0132] (C) Component 2-Ethylhexyl glyceryl ether: LogP 1.93, carbon number 11, manufactured by Kao Corporation 1,2-Octanediol: LogP 1.68, carbon number 8, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. 1-Octanol: LogP 2.64, carbon number 8, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Glyceryl caprylate: Log P 1.64, carbon number 11, Sunsoft No. 700P-2-C, manufactured by Taiyo Kagaku Co., Ltd.

[0133] (D) Component Alkyl glucoside: In the general formula (D1), R 1d is an alkyl group having 12 carbon atoms, x is 0, y is 1.35 to 1.45, and G is a residue derived from glucose, Mydol 12, manufactured by Kao Corporation ·C12EO3: In general formula (D2), R 3d is an alkyl group with 12 carbon atoms, s is 3, and t is 0, EMULGEN 103, manufactured by Kao Corporation ·C12EO6: In general formula (D2), R 3d is an alkyl group with 12 carbon atoms, s is 6, and t is 0, EMULGEN 108, manufactured by Kao Corporation ·C12EO12: In general formula (D2), R 3dis an alkyl group with 12 carbon atoms, s is 12, and t is 0, EMULGEN 120, manufactured by Kao Corporation ·C12EO23: In general formula (D2), R 3d is an alkyl group with 12 carbon atoms, s is 23, and t is 0, EMULGEN 123P, manufactured by Kao Corporation

[0134] <Bactericidal evaluation (1)> ·Culture conditions Five microliters of Escherichia coli (NBRC3972) glycerol stock stored in 10% glycerol at -80°C was taken and inoculated into 5 mL of Soybean Casein Digest (SCD) liquid medium and cultured at 37°C and 200 rpm (reciprocating shaking) for 16 hours. One mL of the culture was centrifuged at 7,000 × g for 5 minutes at room temperature, and the supernatant was removed and suspended in saline. This procedure was repeated twice, and then the OD was measured using saline. 600 The bacterial solution prepared so that the value was 0.8 was used in the subsequent tests.

[0135] Sterilization test conditions The test liquids used were prepared by diluting each disinfectant composition 3-fold (v / v) with water of 5° dH (German hardness). 20 μL of the bacterial solution was inoculated into 2 mL of test solution or 2 mL of physiological saline solution used as a control, dispensed into a test tube. The test solution and bacteria were brought into contact with each other by reciprocal shaking at 170 rpm at room temperature. After the specified contact time (1 minute), 100 μL of the test solution was inactivated by mixing it with 900 μL of a lecithin-polysorbate (LP) diluted solution that had been dispensed into a 24-well plate. The test solution was further diluted with the LP diluted solution, and 100 μL of the solution was smeared on SCD-LP agar medium. After overnight incubation at 37°C, the number of colonies formed on the agar medium was counted, and the number of surviving bacteria was calculated. The bactericidal activity value was calculated by subtracting the logarithm of the number of surviving bacteria in the test group from the logarithm of the number of surviving bacteria in the control group, and the value is shown in Tables 1 and 2.

[0136] [Table 1]

[0137] [Table 2]

[0138] <Bactericidal evaluation (2)> The same test as in the bactericidal activity evaluation (1) was carried out, except that each bactericidal composition shown in Table 3 was used as the test solution in its undiluted form, and the bactericidal activity value was calculated. The results are shown in Table 3.

[0139] [Table 3]

[0140] <Washability test> A mixture of 100 g of beef tallow, 100 g of soybean oil, 2.5 g of monooleic acid, 1.0 g of Sudan III (Fujifilm Wako Pure Chemical Industries, Ltd.), and 600 mL of chloroform was used as a model soil. The prepared model soil was evenly applied to both sides of a 76 mm x 26 mm glass slide (S2441, Matsunami Glass Industry Co., Ltd.) so that a total of 0.04 g was applied to both sides, resulting in a model oil-contaminated slide. For cleaning, deionized water was used, to which calcium chloride and magnesium chloride were added in a mass ratio of 2:1, adjusted to a hardness of 5° dH. The disinfectant composition listed in Table 4 was mixed with 0.7 L of the prepared water to prepare a treatment solution. The combined concentration of component (A) or (A') and component (D) in the treatment solution was 0.023 mass%. Using a Lenatz tester, 0.7 L of treatment solution and six model oil-contaminated glass slides (S2441, manufactured by Matsunami Glass Industry Co., Ltd.) were placed in a 1-liter glass beaker for cleaning tests. The temperature of the treatment solution was set to 30°C, and the slides were stirred at 250 rpm for 3 minutes for cleaning. After cleaning, the slides were transferred to a beaker containing 0.7 L of 5°C dH water, rinsed at 250 rpm for 1 minute, and dried at room temperature. The cleaning rate of the model oil-contaminated glass slides obtained in the above cleaning test was calculated using the following formula. The values in Table 3 are the average cleaning rates for six slides. Cleaning rate (%) = [1 - (weight of glass after cleaning - weight of glass before applying model oil) / (weight of glass after applying model oil - weight of glass before applying model oil)] x 100

[0141] [Table 4]

Claims

1. A disinfectant composition comprising (A) an internal olefin sulfonate salt having from 8 to 24 carbon atoms (hereinafter referred to as component (A)), (B) one or more organic acids selected from lactic acid, succinic acid, gluconic acid, and adipic acid (hereinafter referred to as component (B)), and water, wherein component (A) comprises an internal olefin sulfonate salt (IO-1S) having from 8 to 24 carbon atoms in which a sulfonic acid group is located at position 2 or more and from 4 or less, and an internal olefin sulfonate salt (IO-2S) having from 8 to 24 carbon atoms in which a sulfonic acid group is located at position 5 or more, and wherein the mass ratio of the content of (IO-1S) to the content of (IO-2S), (IO-1S) / (IO-2S), in component (A) is from 0.5 to 6.

5.

2. The disinfectant composition according to claim 1, further comprising an organic solvent having a Log P of 0.5 or more and 10 or less as component (C).

3. The disinfectant composition according to claim 1 or 2, further comprising a nonionic surfactant as component (D).

4. The fungicide composition according to any one of claims 1 to 3, wherein the mass ratio (B) / (A) of the content of the component (A) to the content of the component (B) is 0.01 or more and 2 or less.

5. The fungicide composition according to any one of claims 1 to 3, wherein the mass ratio (B) / (A) of the content of the component (A) to the content of the component (B) is 0.05 or more and 1 or less.

6. The fungicide composition according to any one of claims 1 to 5, wherein the number of carbon atoms in component (A) is 16 or more and 18 or less.

7. 7. The fungicide composition according to claim 3, wherein component (D) is at least one selected from the group consisting of alkyl glycosides having an alkyl group with from 8 to 18 carbon atoms, alkyl polyglycosides having an alkyl group with from 8 to 18 carbon atoms, and polyoxyalkylene alkyl ethers having an alkyl group with from 8 to 18 carbon atoms.

8. The disinfectant composition according to any one of claims 1 to 7, which has a pH of 7 or less at 20°C.

9. A sterilization method comprising contacting the sterilizing composition according to any one of claims 1 to 8, either in its original form or diluted with water, with an object on which bacteria are present.

10. The sterilization method according to claim 9, wherein the object is a hard surface selected from a bathroom, a bathtub, a washbasin, a tile, a restroom, a washstand, a mirror, a kitchen sink, a countertop, a water area, furniture, and a home appliance.

11. The sterilization method according to claim 9 or 10, wherein the bacterium is Escherichia coli.

12. Use of the disinfectant composition according to any one of claims 1 to 8 on hard surfaces selected from bathrooms, bathtubs, washbasins, tiles, restrooms, washstands, mirrors, kitchen sinks, countertops, plumbing areas, furniture, and home appliances.

13. A method for producing a disinfectant composition, comprising mixing (A) an internal olefin sulfonate salt having from 8 to 24 carbon atoms (hereinafter referred to as component (A)), (B) one or more organic acids selected from lactic acid, succinic acid, gluconic acid, and adipic acid (hereinafter referred to as component (B)), and water, wherein component (A) comprises an internal olefin sulfonate salt (IO-1S) having from 8 to 24 carbon atoms in which a sulfonic acid group is located at position 2 or more and position 4 or less, and an internal olefin sulfonate salt (IO-2S) having from 8 to 24 carbon atoms in which a sulfonic acid group is located at position 5 or more, and wherein the mass ratio of the content of (IO-1S) to the content of (IO-2S), (IO-1S) / (IO-2S), in component (A) is from 0.5 to 6.5.

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