Antibacterial composition

Abstract

Provided are a novel antibacterial composition with excellent antibacterial properties and a method for treating textile products. The antibacterial composition includes the following components (A), (B), and (C): (A) Component: Silica (B) Component: Diphenyl ether compound (C) Component: Surfactant

Description

[Technical Field]

[0001] The present invention relates to an antimicrobial composition and a method for treating textile products. [Background technology]

[0002] With the rise in hygiene awareness, users are increasingly interested in antibacterial effects. For example, in the field of detergent compositions for textile products, in addition to cleaning textile products, antibacterial effects are imparted to textile products. It is known that antibacterial agents, such as antibacterial compounds having a diphenyl ether skeleton, are used to impart antibacterial effects.

[0003] Patent Document 1 discloses a composition containing a plurality of antibacterial particles having a specific mass, each of which contains: a) a water-soluble carrier in an amount of 25% to 99% relative to the total weight of the particles; and b) a diphenyl ether antibacterial agent. Patent Document 2 also discloses an SiO 2 composition containing an organic or inorganic antibacterial compound or composition, which provides an enhanced (long-term) antibacterial effect. z Flakes, especially porous SiO z Flakes are disclosed where 0.70≦z≦2.0. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2022-549738 [Patent Document 2] Special Publication No. 2007-537203 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a novel antibacterial composition having excellent antibacterial properties and a method for treating textile products. [Means for solving the problem]

[0006] The present invention relates to an antibacterial composition comprising the following components (A), (B), and (C): (A) Component: Silica (B) Component: Diphenyl ether compound (C) Component: Surfactant

[0007] The present invention also relates to a method for treating textile products, which comprises contacting the textile products with the antibacterial composition of the present invention. [Effects of the Invention]

[0008] According to the present invention, a novel antibacterial composition having excellent antibacterial properties and a method for treating textile products are provided. DETAILED DESCRIPTION OF THE INVENTION

[0009] The inventors discovered that a composition containing silica as component (A), a diphenyl ether compound as component (B), and a surfactant as component (C) has improved antibacterial performance compared to a composition containing component (B) alone, and thus completed the present invention. The reason why the antibacterial composition of the present invention has excellent antibacterial properties is not entirely clear, but is presumed to be as follows. It is presumed that the inclusion of component (A) in the antibacterial composition of the present invention increases the frequency of contact between the antibacterial target and component (B), and that contact of component (A) with bacteria causes stress to the bacterial cells, thereby improving the antibacterial performance of component (B). Therefore, it is presumed that improved dispersion stability of component (A) in the composition leads to improved antibacterial performance. It is also presumed that the inclusion of the surfactant component (C) synergistically improves the antibacterial performance of component (B). Furthermore, by combining component (A) and component (C), it is presumed that the antibacterial activity of component (B) is improved by preventing the antibacterial activity of component (B) from being fully exerted due to component (C) solubilizing, emulsifying, or dispersing component (B). The antibacterial composition and textile treatment method of the present invention are not limited to the above-mentioned mechanism of action.

[0010] In the present invention, antibacterial treatment may mean one or more of killing bacteria adhering to an object, inhibiting bacterial growth, inhibiting bacterial metabolism and inhibiting the production of metabolites, or performing an antibacterial treatment on the surface of the object by washing, spraying, applying, or the like with a treatment solution, and then killing bacteria adhering to the object, inhibiting bacterial growth, or inhibiting bacterial metabolism and inhibiting the production of metabolites. Furthermore, in the present invention, antibacterial properties refer to the properties represented by antibacterial treatment. Therefore, the antibacterial composition of the present invention may be one or more compositions selected from a bactericide composition, a disinfectant composition, a bacteriostatic composition, a bacteriostatic composition, a metabolic inhibitor composition, and a metabolic regulator composition. Furthermore, the antibacterial composition of the present invention may be a composition having the antibacterial properties described above.

[0011] <Antibacterial composition> The antibacterial composition of the present invention comprises the following components (A), (B), and (C): (A) Component: Silica (B) Component: Diphenyl ether compound (C) Component: Surfactant The antibacterial composition of the present invention may be a liquid antibacterial composition containing component (A), component (B), component (C), and water.

[0012] <Component (A)> Component (A) is silica. The silica exists as particles in water in order to enhance the antibacterial activity of component (B). Component (A) can be one or more selected from (A1) silica particles containing silica (SiO2) as a constituent component [hereinafter referred to as component (A1)] and (A2) silica capsules containing silica (SiO2) as a constituent component [hereinafter referred to as component (A2)]. From the viewpoint of further enhancing the antibacterial performance of component (B), component (A) is preferably component (A2). It should be noted that silica may dissolve and become a part of silicate depending on the storage environment conditions. However, the present invention aims to incorporate silica into the composition, and is different not only in invention but also in technical concept from compositions incorporating silicate.

[0013] The volume average particle diameter of component (A) is preferably 0.01 μm or more, more preferably 0.1 μm or more, and even more preferably 0.5 μm or more, from the viewpoint of improving the antibacterial properties by increasing the uniform adhesion of component (B) to the target surface, or from the viewpoint of preventing a specific component (C) from solubilizing, emulsifying, or dispersing component (B), thereby making it difficult for component (B) to fully exhibit its antibacterial properties.From the viewpoint of improving the dispersion stability of component (A) in the composition, thereby further enhancing the antibacterial action of component (B), the volume average particle diameter is preferably 100 μm or less, more preferably 50 μm or less, and even more preferably 30 μm or less. The preferred range of the volume average particle size of components (A1) and (A2) is the same as the preferred range of the volume average particle size of component (A) described above.

[0014] The volume average particle diameter of component (A) was measured by preparing a dispersion by dispersing 0.5% by mass of component (A) in a 0.5% by mass aqueous solution of polyethylene glycol monolauryl ether (average condensation degree 19), irradiating the dispersion with ultrasonic waves at room temperature (25°C) for 1 minute, diluting the dispersion 500 times with water, and measuring the volume average particle diameter of component (A) at room temperature using an LA-910 laser scattering particle size distribution analyzer manufactured by Horiba, Ltd. The volume average particle diameters of the components (A1) and (A2) are also measured in the same manner.

[0015] <Component (A1)> Component (A1) is silica particles containing silica (SiO2) as a constituent component, and examples of component (A1) include silica particles having a volume average particle diameter of 0.01 μm or more and 100 μm or less.

[0016] The silica particles of component (A1) preferably have pores in order to improve their activity against bacteria. The average pore size of component (A1) is preferably 1 nm or more and 50 nm or less, more preferably 5 nm or more and 30 nm or less. Furthermore, the silica particles of component (A1) are preferably amorphous silica particles in order to improve their activity against bacteria. Specific examples of such silica particles include Sunsphere H122, Sunsphere H201, and Sunsphere H32 manufactured by Asahi Glass Co., Ltd. The average pore size of component (A1) refers to the peak pore size in the pore size distribution. The peak pore size of component (A1) is measured by the following method.

[0017] <Method for measuring the pore diameter peak of component (A1)> The pore size peak of component (A1) can be measured by a multipoint method using liquid nitrogen with a pore size distribution analyzer (manufactured by BEL Japan, product name: BELSORP mini II). The peak top in the pore size distribution is taken as the pore size peak. The measurement sample is pretreated by heating at 110°C for 1 hour.

[0018] <(A2) component> Component (A2) is a silica capsule containing silica (SiO2) as a constituent. For example, component (A2) may be a silica capsule containing a functional agent. The shell of the silica capsule is a polymer containing silica as a constituent, and component (A2) in the form of a polymer is preferred because it contributes to improving the antibacterial properties of component (B).

[0019] Examples of functional agent-encapsulating silica capsules of component (A2) include those having a shell containing silica as a constituent component and a core containing a functional agent inside the shell.

[0020] (shell) Examples of component (A2) include those having a shell containing silica as a constituent component. The shell of component (A2) may be composed of silica as a constituent component in part or substantially in its entirety. From the viewpoint of improving high-temperature storage stability, the silica is preferably produced from raw silica, which generates a silanol compound by hydrolysis of alkoxysilane or the like. From the viewpoint of improving high-temperature storage stability, the shell of component (A2) is preferably formed by a sol-gel reaction using an alkoxysilane as a precursor. In the present invention, the term "sol-gel reaction" refers to a reaction in which an alkoxysilane undergoes hydrolysis and polycondensation to form silica, a constituent component of the shell, through a sol and gel state. Specifically, for example, tetraalkoxysilane is hydrolyzed, and the silanol compound undergoes a dehydration condensation reaction and a dealcoholization condensation reaction to generate a siloxane oligomer, and the dehydration condensation reaction further progresses to form silica.

[0021] The raw silica may be at least one selected from the group consisting of silicon tetrachloride, tetraalkoxysilane, alkylalkoxysilane, water glass, and metal silicate. Among them, from the viewpoint of improving high-temperature storage stability, tetraalkoxysilane and alkylalkoxysilane are preferred, and tetraalkoxysilane is more preferred.

[0022] Examples of tetraalkoxysilane include tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane. From the viewpoint of improving high-temperature storage stability, tetramethoxysilane and tetraethoxysilane are preferred, and tetraethoxysilane is more preferred. Examples of alkylalkoxysilanes include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, methylphenyldiethoxysilane, ethylphenyldimethoxysilane, diethyldiethoxysilane, ethylphenyldiethoxysilane, trimethylmethoxysilane, trimethylethoxysilane, dimethylphenylethoxysilane, triethylmethoxysilane, and triethylethoxysilane. These may be used alone or in combination of two or more. Condensates thereof may also be used.

[0023] Furthermore, the shell of component (A2) may contain an inorganic polymer other than silica as a constituent component, provided that the effects of the present invention are not impaired. In the present invention, the term "inorganic polymer" refers to a polymer containing an inorganic element. Examples of such inorganic polymers include polymers consisting only of inorganic elements, polymers whose main chains are composed only of inorganic elements and have organic groups as side chains or substituents, and the like. From the viewpoint of improving high-temperature storage stability, the inorganic polymer is preferably a metal oxide containing a metal element or a semimetal element, and more preferably a metal alkoxide [M(OR) x The polymer is formed by a reaction similar to the sol-gel reaction of silica using the precursor M, where M is a metal or semimetal element, and R is a hydrocarbon group. Examples of metal or semimetal elements constituting metal alkoxides include titanium, zirconium, aluminum, and zinc.

[0024] (core) The core of component (A2) contains one or more functional agents. The functional agent may be, for example, an oil-soluble liquid. When component (B) is used as the functional agent, component (A) encapsulates component (B) inside the shell, and when the shell is ruptured, component (B) is released, thereby exhibiting antibacterial properties.

[0025] The functional agent is not particularly limited, but examples thereof preferably include one or more selected from the group consisting of fragrances, fragrance precursors, oils, antioxidants, cooling agents, warming agents, antibacterial agents, dyes, pigments, UV absorbers, silicones, solvents, and oil-soluble polymers, and more preferably one or more selected from the group consisting of fragrances, fragrance precursors, oils, antioxidants, cooling agents, warming agents, antibacterial agents, UV absorbers, and solvents. From the viewpoint of enhancing the antibacterial performance of component (B), it is preferable for the functional agent to contain component (B).

[0026] <(B) component> The component (B) is a diphenyl ether compound. One or more types of the component (B) can be used in combination. Regarding component (B), an antibacterial compound is a compound that shows a growth inhibition zone when an antibacterial test is performed using a cotton cloth #2003 with 1% by mass of the compound evenly applied, according to JIS L 1902 "Antibacterial Test Method for Textile Products."

[0027] From the viewpoint of improving antibacterial properties and ease of fixation to textile products after washing (antibacterial retention), component (B) is preferably an antibacterial compound having a diphenyl ether skeleton, for example, an antibacterial compound containing a halogen atom and having a diphenyl ether skeleton. Specific compounds include diclosan (5-chloro-2-(4-chlorophenoxy)phenol) and triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol). From the viewpoint of improving antibacterial properties and ease of fixation to textile products after washing, one or more compounds selected from diclosan and triclosan are preferred. Furthermore, diclosan is more preferred from the viewpoint of being able to further enjoy the improved antibacterial performance of component (A) in the antibacterial composition.

[0028] <(C) component> The component (C) is a surfactant. One or more types of component (C) can be used in combination. The component (C) may be one or more selected from the group consisting of (C1) anionic surfactants (hereinafter referred to as component (C1)), (C2) nonionic surfactants (hereinafter referred to as component (C2)), (C3) cationic surfactants (hereinafter referred to as component (C3)), and (C4) amphoteric surfactants (hereinafter referred to as component (C4)). From the viewpoint of improving the dispersibility of the (A) component and thereby further improving the antibacterial activity of the (B) component, the (C) component is preferably at least one selected from the (C1) component and the (C2) component, more preferably a (C) component containing the (C1) component, and even more preferably a (C) component containing the (C1) component and the (C2) component.

[0029] <(C1) component> Component (C1) is an anionic surfactant. From the viewpoints of improving the dispersion stability of component (A) and further enhancing the antibacterial activity of component (B), component (C1) is preferably one or more selected from sulfonic acids and salts thereof having a hydrocarbon group, sulfates and salts thereof having a hydrocarbon group, and carboxylic acids and salts thereof, and more preferably one or more selected from sulfonic acids and salts thereof having a hydrocarbon group, and carboxylic acids and salts thereof having a hydrocarbon group. The hydrocarbon group may be an alkyl or alkenyl group. From the viewpoints of suppressing separation due to aggregation of component (A) and precipitation of component (B) during low-temperature storage and maintaining the antibacterial activity of component (B) even in low-temperature environments, the number of carbon atoms in the hydrocarbon group is preferably 7 or more, more preferably 9 or more, even more preferably 11 or more, and preferably 27 or less, more preferably 22 or less, even more preferably 20 or less, and even more preferably 18 or less. Examples of the salt include monovalent metal salts such as sodium salts and potassium salts, divalent metal salts such as magnesium salts, and organic amine salts such as ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts. From the viewpoints of suppressing separation due to aggregation of component (A) during low-temperature storage and maintaining the improving effect of the antibacterial performance of component (B), potassium salts or monoethanolamine salts are preferred.

[0030] From the viewpoint of improving the dispersion stability of component (A) and further enhancing the antibacterial activity of component (B), component (C1) is preferably one or more anionic surfactants selected from the following components (C1-1) to (C1-5). Component (C1-1): a sulfonic acid or a salt thereof represented by the following general formula (C1-1): R 1c -B-SO3M (C1-1) [In the formula, R 1c represents an alkyl or alkenyl group having 3 to 21 carbon atoms, B represents a benzene ring, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. 1c The sulfonic acid group is bonded to the ortho, meta, or para position. Component (C1-2): an internal olefin sulfonic acid or its salt having 14 to 24 carbon atoms (C1-3) component: a fatty acid having 8 to 20 carbon atoms or a salt thereof Component (C1-4): a sulfate ester or a salt thereof represented by the following general formula (C1-4): R 2c -O-[(PO) m / (EO) n ]-SO3M (C1-4) [In the formula, R 2c represents an alkyl or alkenyl group having 8 to 22 carbon atoms, the carbon atom bonded to the oxygen atom is a primary carbon atom, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, EO and PO may be bonded in a block or random manner, / is a symbol indicating that the bonding order of PO and EO does not matter, m and n represent the average number of moles added, m is 0 to 5 and n is 0 to 16, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium or an organic ammonium. Component (C1-5): an α-sulfofatty acid ester represented by the following general formula (C1-5) or a salt thereof R 3c -CH(SO3M)COOR 4c (C1-5) [In the formula, R 3crepresents an alkyl or alkenyl group having 6 to 20 carbon atoms, and R 4c represents an alkyl group having 1 to 6 carbon atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium.

[0031] In formula (C1-1), R 1c From the viewpoint of improving the dispersion stability of component (A) and further enhancing the antibacterial activity of component (B), the number of carbon atoms is 3 or more, preferably 5 or more, more preferably 6 or more, even more preferably 7 or more, and 21 or less, preferably 20 or less, more preferably 19 or less, even more preferably 18 or less. In formula (C1-1), M is preferably an alkali metal or an organic ammonium, more preferably an organic ammonium, from the viewpoint of suppressing separation due to aggregation of component (A) or precipitation of component (C1-1) during low-temperature storage and maintaining the effect of improving the antibacterial performance of component (B). In the antibacterial composition of the present invention, the content of the component (C1-1) is based on the amount of the compound converted into a sodium salt.

[0032] Examples of component (C1-1) include alkylbenzenesulfonic acid, cumenesulfonic acid, and salts thereof, in which the alkyl group has 3 to 21 carbon atoms. From the viewpoint of further enhancing the antibacterial activity of component (B), component (C1-1) is preferably alkylbenzenesulfonic acid, in which the alkyl group has 3 to 21 carbon atoms, or a salt thereof.

[0033] The number of carbon atoms of the internal olefin sulfonic acid or its salt of component (C1-2) is 14 or more, preferably 16 or more, more preferably 18 or more, and 24 or less, more preferably 22 or less, and even more preferably 20 or less, from the viewpoint of improving the dispersion stability of component (A) and further enhancing the antibacterial activity of component (B). The component (C1-2) includes not only internal olefin sulfonic acid or a salt thereof, but also hydroxyalkane sulfonic acid or a salt thereof and α-olefin sulfonic acid or a salt thereof, which are produced during synthesis.

[0034] The salt of component (C1-2) can be one or more selected from alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, and organic amine salts (for example, alkanolamine salts such as monoethanolamine, diethanolamine, and triethanolamine). From the viewpoints of suppressing separation due to aggregation of component (A) or precipitation of component (C1-2) during low-temperature storage and maintaining the effect of improving the antibacterial performance of component (B), the salt is preferably one or more selected from alkali metal salts and alkanolamine salts having from 2 to 6 carbon atoms. In the antibacterial composition of the present invention, the content of the component (C1-2) is based on the amount of the compound converted into a potassium salt.

[0035] The number of carbon atoms in the fatty acid of component (C1-3) is 8 or more, preferably 10 or more, more preferably 12 or more, and 20 or less, more preferably 18 or less, and even more preferably 16 or less, from the viewpoint of improving the dispersion stability of component (A) and further enhancing the antibacterial activity of component (B).

[0036] Examples of the (C1-3) component include one or more selected from octanoate, decanoate, laurate, myristate, palmitate, stearate, mixtures thereof such as coconut fatty acid, palm fatty acid, and palm kernel fatty acid, and salts thereof.

[0037] The salt of component (C1-3) can be one or more selected from alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, ammonium salts, and organic amine salts (for example, alkanolamine salts such as monoethanolamine, diethanolamine, and triethanolamine). From the viewpoints of suppressing separation due to aggregation of component (A) or precipitation of component (C1-3) during low-temperature storage and maintaining the improving effect of the antibacterial performance of component (B), the salt is preferably one or more selected from alkali metal salts and alkanolamine salts having from 2 to 6 carbon atoms. In the antibacterial composition of the present invention, the content of the component (C1-3) is based on the amount of the compound converted into a sodium salt.

[0038] In formula (C1-4), R 2c is an alkyl or alkenyl group, preferably an alkyl group, having 9 or more carbon atoms, more preferably 10 or more, even more preferably 12 or more, and preferably 18 or less, more preferably 16 or less, even more preferably 14 or less, from the viewpoint of suppressing separation due to aggregation of component (A) or precipitation of component (C1-4) during low-temperature storage and maintaining the improving effect of the antibacterial performance of component (B). From the viewpoint of improving the dispersion stability of component (A) and improving the antibacterial performance of component (B), R 2c is preferably a straight chain alkyl group.

[0039] In formula (C1-4), m is preferably 4 or less, more preferably 3 or less, and 0 or more, from the viewpoint of improving solubility in water. In formula (C1-4), n is preferably 0 or more, more preferably 1 or more, even more preferably 2 or more, still more preferably 4 or more, and is preferably 10 or less, more preferably 8 or less, even more preferably 6 or less, from the viewpoint of improving solubility in water.

[0040] In formula (C1-4), M is preferably one or more selected from a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, and an organic ammonium, from the viewpoint of improving solubility in water. M is more preferably one or more selected from an alkali metal such as sodium or potassium, and an alkanolammonium such as monoethanolammonium or diethanolammonium, from the viewpoint of suppressing separation due to aggregation of component (A) during low-temperature storage and maintaining the effect of improving the antibacterial performance of component (B), and is even more preferably alkanolammonium. In the antibacterial composition of the present invention, the content of the component (C1-4) is based on the amount of the compound converted into a sodium salt.

[0041] From the viewpoint of improving solubility in water, the component (C1-4) is preferably a sodium (polyoxypropylene) polyoxyethylene alkyl ether sulfate ester in which the alkyl group has 12 to 14 carbon atoms, the average number of moles of propyleneoxy groups added is 0 to 4, and the average number of moles of ethyleneoxy groups added is 1 to 4. That is, the component (C1-4) is preferably a sodium polyoxypropylene polyoxyethylene alkyl ether sulfate ester in which the alkyl group has 12 to 14 carbon atoms, the average number of moles of propyleneoxy groups added is 0 to 4, and the average number of moles of ethyleneoxy groups added is 1 to 4. That is, in the general formula (C1-4), R 2c is an alkyl group having 12 to 14 carbon atoms, m is 0 to 4, n is 1 to 4, and M is sodium.

[0042] In formula (C1-5), R 3c is an alkyl or alkenyl group, preferably an alkyl group, having a carbon number of preferably 8 or more, more preferably 10 or more, and preferably 18 or less, more preferably 16 or less, from the viewpoint of suppressing separation due to aggregation of component (A) during low-temperature storage and maintaining the effect of improving the antibacterial performance of component (B). In formula (C1-5), R 4c is an alkyl group having 1 or more carbon atoms, and preferably 5 or less, more preferably 4 or less, from the viewpoint of improving solubility in water. In formula (C1-5), M is preferably one or more selected from a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, and an organic ammonium, from the viewpoint of improving solubility in water. M is more preferably one or more selected from an alkali metal such as sodium or potassium, and an alkanolammonium such as monoethanolammonium or diethanolammonium, and even more preferably sodium, from the viewpoint of suppressing separation due to aggregation of component (A) during low-temperature storage and maintaining the improving effect of the antibacterial activity of component (B). In the antibacterial composition of the present invention, the content of the component (C1-5) is based on the amount of the compound converted into a sodium salt.

[0043] From the viewpoint of improving the solubility in water, the component (C1-5) is 3c is an alkyl group having 11 or more and 14 or less, R 4cis a methyl group.

[0044] In the antibacterial composition of the present invention, from the viewpoint of improving the dispersion stability of component (A) and improving the antibacterial activity of component (B), component (C1) is preferably at least one selected from linear alkylbenzenesulfonic acid, polyoxyethylene alkyl ether sulfate, polyoxypropylene polyoxyethylene alkyl ether sulfate, α-olefinsulfonic acid, internal olefinsulfonic acid, and salts thereof. Examples of the salts include monovalent metal salts such as sodium salts and potassium salts, divalent metal salts such as magnesium salts, and organic amine salts such as ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts.

[0045] From the viewpoint of improving the antibacterial activity of component (B) due to component (A), component (C1) preferably contains one or more compounds selected from components (C1-1), (C1-2), and (C1-3). The mass ratio of the total content of components (C1-1), (C1-2), and (C1-3) to the content of component (C1) in the antibacterial composition, [(C1-1) + (C1-2) + (C1-3)] / (C1), is preferably 0.3 or more, more preferably 0.4 or more, and even more preferably 0.5 or more, from the viewpoint of improving the antibacterial activity of component (B) due to component (A), and from the same viewpoint, is preferably 1.0 or less.

[0046] From the viewpoint of improving the antibacterial activity of component (B) due to component (A), component (C1) preferably contains component (C1-1). From the viewpoint of improving the antibacterial activity of component (B) due to component (A), the mass ratio of the content of component (C1-1) to the content of component (C1) contained in the antibacterial composition, (C1-1) / (C1), is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, and still more preferably 0.4 or more, and from the same viewpoint, is preferably 1.0 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.

[0047] <(C2) component> Component (C2) is a nonionic surfactant. From the viewpoint of improving the dispersion stability of component (A) and enhancing the antibacterial activity of component (B), component (C2) may be one or more selected from sucrose fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene fatty acid esters, fatty acid alkanolamides or alkylene oxide adducts thereof, polyoxyalkylene alkyl ethers, fatty acid methyl ester alkoxylates, alkyl glycosides, and glyceryl monoethers, with one or more selected from polyoxyalkylene alkyl ethers and fatty acid methyl ester alkoxylates being preferred.

[0048] The component (C2) can be a compound represented by the following general formula (C2-1) [hereinafter referred to as component (C2-1)], from the viewpoint of improving the dispersion stability of component (A) and enhancing the antibacterial activity of component (B). R 5c -(CO) x O-(EO) y -R 6c (C2-1) [In the formula, R 5c is an alkyl or alkenyl group having 9 to 18 carbon atoms, and R 6c represents a hydrogen atom or a methyl group, CO represents a carbonyl group, x represents the number 0 or 1, EO represents an ethyleneoxy group, and y represents the average number of moles added, which is 3 or more and 50 or less.

[0049] In formula (C2-1), R 5c From the viewpoint of improving the dispersion stability of component (A) and improving the antibacterial activity of component (B), the number of carbon atoms is 9 or more, preferably 10 or more, more preferably 11 or more, even more preferably 12 or more, and preferably 17 or less, more preferably 16 or less, even more preferably 15 or less, and even more preferably 14 or less. In formula (C2-1), x is a number of 0 or 1 from the viewpoint of improving solubility in water, and is preferably 0 from the viewpoint of further improving the antibacterial activity of component (B). In formula (C2-1), y is 3 or more, preferably 5 or more, more preferably 7 or more, even more preferably 8 or more, still more preferably 9 or more, still more preferably 10 or more, and is 50 or less, preferably 40 or less, more preferably 30 or less, still more preferably 20 or less, and still more preferably 15 or less, from the viewpoint of improving solubility in water.

[0050] The component (C2) is, from the viewpoint of improving the dispersion stability of the component (A) and improving the antibacterial activity of the component (B), for example, a compound represented by the following general formula (C2-2) [hereinafter referred to as component (C2-2)]. R 7c -(CO) z O-〔(EO) s / (AO) t -H (C2-2) [In the formula, R 7c represents an alkyl or alkenyl group having 8 to 18 carbon atoms, CO represents a carbonyl group, z represents the number 0 or 1, EO represents an ethyleneoxy group, AO represents an alkyleneoxy group having 3 or 4 carbon atoms, and s and t represent the average number of moles added, s being 0 to 30 and t being 0.1 to 5. The EO and AO groups may be bonded randomly or in blocks. When the AO group contains two or more types of alkyleneoxy groups, the different alkyleneoxy groups may be bonded randomly or in blocks.

[0051] In formula (C2-2), R 7c From the viewpoint of improving solubility in water, the number of carbon atoms is preferably 9 or more, more preferably 10 or more, even more preferably 11 or more, still more preferably 12 or more, and is preferably 17 or less, more preferably 16 or less, even more preferably 15 or less, still more preferably 14 or less.

[0052] In formula (C2-2), z is a number of 0 or 1 from the viewpoint of improving solubility in water, and is preferably 0 from the viewpoint of further improving the antibacterial activity of the component (B). In formula (C2-2), s is 0 or more, preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, still more preferably 5 or more, still more preferably 7 or more, and 30 or less, preferably 25 or less, more preferably 20 or less, from the viewpoint of preventing a decrease in the antibacterial activity of component (B) due to excessive solubilization, emulsification, or dispersion of component (B), and from the viewpoint of improving the solubility in water. In formula (C2-2), t is 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and 5 or less, preferably 4.5 or less, more preferably 4.2 or less, from the viewpoint of improving the antibacterial activity of component (B).

[0053] More specific examples of the component (C2-2) include compounds represented by the following general formula (C2-2-1). R 7c -(CO) z O-(EO) s1 -(PO) t -(EO) s2 -H (C2-2-1) [In the formula, R 7c CO, z, EO, and t have the same meanings as in the general formula (C2-2). PO is a propyleneoxy group, s1 and s2 are each the average number of moles added, and are 0 to 30, and s1+s2 is 0 to 30.

[0054] In formula (C2-2-1), R 7c From the viewpoint of improving solubility in water, the number of carbon atoms is preferably 9 or more, more preferably 10 or more, even more preferably 11 or more, still more preferably 12 or more, and is preferably 17 or less, more preferably 16 or less, even more preferably 15 or less, still more preferably 14 or less.

[0055] In formula (C2-2-1), z is preferably 0 from the viewpoint of further improving the antibacterial activity of the component (B). In formula (C2-2-1), s1 is 30 or less, preferably 15 or less, more preferably 8 or less, even more preferably 3 or less, and 0 or more, most preferably 0, from the viewpoint of preventing a decrease in the antibacterial activity of component (B) due to component (C) solubilizing, emulsifying, or dispersing component (B). In formula (C2-2-1), t is 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and 5 or less, preferably 4.5 or less, more preferably 4.2 or less, from the viewpoint of improving the antibacterial activity of component (B) and improving its solubility in water. In formula (C2-2-1), s2 is 0 or more, preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, still more preferably 5 or more, still more preferably 7 or more, and 30 or less, preferably 25 or less, more preferably 20 or less, from the viewpoint of preventing a decrease in the antibacterial activity of component (B) due to excessive solubilization, emulsification, or dispersion of component (B), and from the viewpoint of improving solubility in water.

[0056] When component (C2) comprises components (C2-1) and (C2-2), the mass ratio of the content of component (C2-1) to the content of component (C2-2) in component (C2), (C2-1) / (C2-2), is, from the viewpoint of preventing a decrease in the effect of improving the antibacterial activity of component (B) due to excessive solubilization, emulsification, or dispersion of component (B), preferably 50 or less, more preferably 30 or less, even more preferably 20 or less, still more preferably 10 or less, still more preferably 5 or less, still more preferably 3 or less, still more preferably 1 or less, still more preferably 0.5 or less, and still more preferably 0.3 or less, and is 0 or more, with 0 being preferred.

[0057] <(C3) component> The component (C3) is a cationic surfactant. One or more types of component (C3) can be used in combination. Examples of the component (C3) include compounds represented by the following general formula (C3):

[0058] [ka]

[0059] [In the formula, R 8c and R 9c are each independently a chain hydrocarbon group having 8 to 10 carbon atoms, and R 10c and R 11c are each independently an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, and X - is an alkyl sulfate ion having 1 to 3 carbon atoms, or a halide ion.

[0060] <(C4) component> The component (C4) is an amphoteric surfactant. One or more types of component (C4) can be used in combination. Examples of the component (C4) include sulfobetaine, carboxybetaine, and amine oxide.

[0061] When component (C) comprises components (C1) and (C2), the mass ratio of the content of component (C1) to the content of component (C2) [(C1) / (C2)] in the antibacterial composition of the present invention, and further in component (C), is preferably 0.2 or more, more preferably 0.3 or more, and even more preferably 0.4 or more, from the viewpoint of further enhancing the antibacterial action of component (B), and is preferably 1.2 or less, more preferably 1.1 or less, and even more preferably 1 or less, from the viewpoint of improving the dispersion stability of component (A).

[0062] <Composition, etc.> From the viewpoint of improving antibacterial performance, the antibacterial composition of the present invention contains the component (A) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, and preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less.

[0063] From the viewpoint of improving antibacterial performance, the antibacterial composition of the present invention contains the component (B) in an amount of preferably 0.001% by mass or more, more preferably 0.003% by mass or more, even more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more, even more preferably 0.016% by mass or more, and preferably 1% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less.

[0064] In the antibacterial composition of the present invention, the mass ratio of the content of the (B) component to the content of the (A) component [(B) / (A)] is, from the viewpoint of improving antibacterial performance, preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.75 or more, and is preferably 3 or less, more preferably 2 or less, even more preferably 1 or less.

[0065] From the viewpoint of improving antibacterial properties, the antibacterial composition of the present invention contains component (C) in an amount of preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 4.5% by mass or more, and preferably 80% by mass or less, more preferably 70% by mass or less, even more preferably 60% by mass or less.

[0066] <Water> The antibacterial composition of the present invention may optionally contain water. The water may be deionized water, tap water, purified water, or the like. Water may be used as the remainder of the composition in an amount such that the total composition is 100% by mass. From the viewpoint of improving the dispersion stability of component (A), the antibacterial composition of the present invention contains water in an amount of preferably 10% by mass or more, more preferably 30% by mass or more, even more preferably 50% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less. The antibacterial composition of the present invention is preferably in a liquid form from the viewpoint of improving ease of handling by users, that is, a liquid antibacterial composition is preferred.

[0067] <(D) component> The antibacterial composition of the present invention may further contain an optional hydroxyl group-containing organic solvent as component (D) from the viewpoint of improving the stability of component (C) and enhancing the antibacterial activity of component (B). However, component (D) excludes the hydroxyl group-containing organic solvent encapsulated in the silica capsules of component (A). One or more types of component (D) may be used in combination.

[0068] Examples of the component (D) include the following compounds (D1) to (D6). (D1) Monohydric alcohols with 2 to 4 carbon atoms, such as ethanol and isopropanol (D2) Polyhydric alcohols having 2 to 8 carbon atoms, such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, and glycerin, with a hydric or more and a hexahydric or less. (D3) Glycol ethers having 4 to 12 carbon atoms, such as diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and tripropylene glycol (D4) Alkyl (carbon number 1 to 10) ethers of divalent to tetravalent polyhydric alcohols, such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, tripropylene glycol monomethyl ether, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 1-methylglyceryl ether, 2-methylglyceryl ether, 1,3-dimethylglyceryl ether, 1-ethylglyceryl ether, 1,3-diethylglyceryl ether, 1-pentylglyceryl ether, 2-pentylglyceryl ether, 1-octylglyceryl ether, and 2-ethylhexylglyceryl ether (D5) Aromatic ethers of glycols such as phenoxyethanol, diethylene glycol monophenyl ether, triethylene glycol monophenyl ether, polyethylene glycol monophenyl ether having an average molecular weight of about 480, 2-benzyloxyethanol, and diethylene glycol monobenzyl ether (D6) Organic solvents other than (D1) to (D5), such as 3-methoxy-3-methyl-1-butanol

[0069] From the viewpoint of improving the stability of component (C) and enhancing the antibacterial activity of component (B), component (D) is preferably at least one selected from phenoxyethanol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, ethanol, ethylene glycol, propylene glycol, and butylene glycol, and more preferably at least one selected from phenoxyethanol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, ethylene glycol, and propylene glycol.

[0070] When the antibacterial composition of the present invention contains the component (D), the antibacterial composition of the present invention preferably contains more than 0% by mass of the component (D), more preferably 1% by mass or more, and even more preferably 2% by mass or more of the component (D), from the viewpoints of improving the stability of the component (C) and improving the antibacterial action of the component (B); and from the viewpoints of improving the dispersion stability of the component (A) and improving the antibacterial action of the component (B), the antibacterial composition of the present invention contains preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less of the component (D).

[0071] <Other optional ingredients> The antibacterial composition of the present invention may optionally contain any of the following components (E1) to (E10), excluding those encapsulated in silica capsules of component (A). (E1) pH adjusters selected from acid agents such as inorganic acids such as hydrochloric acid and sulfuric acid, organic acids such as p-toluenesulfonic acid, (o-, m-, p-) xylenesulfonic acid, citric acid, succinic acid, malic acid, fumaric acid, tartaric acid, malonic acid, maleic acid, and alkali agents such as sodium hydroxide, potassium hydroxide, ammonia and its derivatives, amine salts such as monoethanolamine, diethanolamine, triethanolamine, sodium carbonate, potassium carbonate, etc. (E2) Anti-redeposition agents and dispersants such as polyacrylic acid, polymaleic acid, carboxymethyl cellulose, etc. (E3) Touch improvers such as silicone polymers, polymers containing cationic vinyl addition monomers, etc. (E4) Bleaching agents such as hydrogen peroxide, sodium percarbonate or sodium perborate, etc. (E5) Bleaching activators such as tetraacetylethylenediamine, bleaching activators represented by general formulas (I-2) to (I-7) of JP-A-6-316700, etc. (E6) One or more enzymes selected from cellulase, amylase, pectinase, protease and lipase (E7) Fluorescent dyes, for example, fluorescent dyes commercially available as Tinopal CBS (trade name, manufactured by Ciba Specialty Chemicals Inc.) and Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.) (E8) Antioxidants such as butylhydroxytoluene, distyrenated cresol, sodium sulfite and sodium bisulfite, etc. (E9) Defoaming agents such as pigments, fragrances, silicone, etc. (E10) Thickening agents such as hydrogenated castor oil, xanthan gum, etc.

[0072] The pH of the antibacterial agent composition of the present invention is not particularly limited, but can be set in consideration of viewpoints such as further enhancing antibacterial performance. The pH at 25 ° C. may be, for example, 1 or more, further 2 or more, further 2.5 or more, and 11 or less, further 10 or less, further 9 or less. The pH of the antibacterial agent composition is a value measured at 25 ° C. using a glass electrode. Specifically, it is measured by the following method.

[0073] <Method for Measuring pH> A pH electrode (Model 6367) is pre-calibrated with a phthalate buffer solution (pH 4.01), a phosphate standard solution (pH 6.84), and a borate standard solution (pH 9.18) in a Horiba, Ltd. pH meter D-52, and then thoroughly rinsed with deionized water. The pH electrode, calibrated and cleaned as described above, is placed in the antibacterial composition whose temperature has been adjusted to 25°C, and measurements are taken using the pH meter's AUTO HOLD mode until the measured value becomes constant.

[0074] The antibacterial composition of the present invention is suitable for use on textile products such as clothing, towels, bedding, and textile products for bedding (sheets, pillowcases, etc.), as well as on hard surfaces such as washing machine drums, tableware, bathrooms, floors, toilets, mirrors, kitchen sinks, countertops, areas around water supplies, and medical instruments.

[0075] The antibacterial composition of the present invention can be applied to textile products containing various fibers. The fibers constituting the textile products may be either hydrophobic or hydrophilic. Furthermore, the fibers may be any of natural fibers, chemical fibers, or a mixture thereof. Examples of hydrophobic fibers include protein fibers (milk protein casein fiber, Promix, etc.), polyamide fibers (nylon, etc.), polyester fibers (polyester, etc.), polyacrylonitrile fibers (acrylic, etc.), polyvinyl alcohol fibers (vinylon, etc.), polyvinyl chloride fibers (polyvinyl chloride, etc.), polyvinylidene chloride fibers (vinylidene, etc.), polyolefin fibers (polyethylene, polypropylene, etc.), polyurethane fibers (polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer fibers (polycral, etc.), polyalkylene paraoxybenzoate fibers (benzoate, etc.), polyfluoroethylene fibers (polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers (rock fibers), slag fibers (slag fibers), and metal fibers (gold thread, silver thread, steel fibers). Examples of hydrophilic fibers include seed hair fibers (cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulosic fibers (rayon, polynosic, cupra, acetate, etc.). In the present invention, the textile product means fabrics such as woven fabrics, knitted fabrics, nonwoven fabrics, etc. using these various fibers, and textile products obtained using them, such as undershirts, T-shirts, dress shirts, hats, handkerchiefs, towels, bedding, sheets, pillowcases, masks, etc. Preferred textile products are woven fabrics such as woven fabrics and knitted fabrics, and woven textile products.

[0076] When the antibacterial composition of the present invention is an antibacterial composition for textile products, the antibacterial composition of the present invention may be one or more compositions selected from an antibacterial fabric softener composition for textile products, an antibacterial liquid fabric softener composition for textile products, an antibacterial detergent composition for textile products, and an antibacterial liquid detergent composition for textile products.

[0077] Examples of materials for hard articles include plastics (including silicone resins), metals, ceramics, wood, and combinations thereof. Examples of plastics include polyolefins such as polypropylene and polyethylene, polymethacrylates, polycarbonates, ABS resins, and polyethylene terephthalates.

[0078] The bacteria that the antibacterial composition of the present invention is intended to treat are not particularly limited, and examples thereof include one or more bacteria selected from Escherichia coli, Staphylococcus such as Staphylococcus aureus, Micrococcus, Moraxella, Acinetobacter, Propionibacterium, Corynebacterium, Legionella, Lactobacillus, Clostridium, Streptococcus, Haemophilus, Shigella, Ralstonia solanacearum, Sphingobium, Pseudomonas, Xanthomonas, and Aspergillus. From the viewpoint of the odor-producing ability of bacteria, the antibacterial composition preferably has antibacterial properties that are effective against one or more bacteria selected from Escherichia coli, Staphylococcus such as Staphylococcus aureus, Micrococcus, Moraxella, Acinetobacter, Propionibacterium, and Corynebacterium.

[0079] The antibacterial composition of the present invention may be a liquid antibacterial composition comprising component (A), component (B), component (C), and water. For this liquid antibacterial composition, the content of each component described above can be applied by replacing it with the amount of each component in the total amount of all components blended. The antibacterial composition of the present invention may also be a liquid antibacterial composition for textile products.

[0080] <Method of processing textile products> The present invention provides a method for treating textile products, which comprises contacting the textile products with the antibacterial composition of the present invention. The method for treating textile products of the present invention may be a method for cleaning textile products, in which a treatment liquid containing the antibacterial composition of the present invention and water (hereinafter also referred to as the treatment liquid of the present invention) is brought into contact with the textile product. The matters described for the antibacterial composition of the present invention can be applied to the method for treating textile products of the present invention. Specific examples and preferred examples of optional components such as components (A), (B), (C), (D), and (E) as well as the antibacterial composition in the method for treating textile products of the present invention are also the same as those for the antibacterial composition of the present invention. The method for treating textile products of the present invention can use a treatment liquid prepared from the antibacterial composition of the present invention. The antibacterial composition of the present invention may be used as a treatment liquid as long as it has a composition suitable for antibacterial treatment. The treatment liquid of the present invention may be a treatment liquid obtained by mixing component (A), component (B), component (C), and water. In this treatment liquid, the contents of each component described below can be applied by replacing them with the mixed amount of each component out of all the components to be mixed.

[0081] In the method for treating textile products, the pH of the treatment solution of the present invention is not particularly limited, but can be set taking into consideration factors such as further enhancing antibacterial performance, and the pH at 25°C may be, for example, 1 or more, further 2 or more, further 2.5 or more, and 11 or less, further 10 or less, or further 9 or less. The pH of the treatment solution is a value measured at 25° C. using a glass electrode, and specifically, is measured in the same manner as the pH of the antibacterial composition of the present invention.

[0082] <Composition, etc.> From the viewpoint of improving antibacterial performance, the treatment liquid of the present invention contains component (A) in an amount of preferably 0.01 ppm or more, more preferably 0.1 ppm or more, even more preferably 0.2 ppm or more, and preferably 50 ppm or less, more preferably 30 ppm or less, even more preferably 10 ppm or less.

[0083] From the viewpoint of improving antibacterial performance, the treatment liquid of the present invention contains component (B) in an amount of preferably 0.01 ppm or more, more preferably 0.03 ppm or more, even more preferably 0.05 ppm or more, even more preferably 0.1 ppm or more, even more preferably 0.16 ppm or more, and preferably 10 ppm or less, more preferably 5 ppm or less, even more preferably 3 ppm or less.

[0084] In the treatment solution of the present invention, the mass ratio of the content of component (B) to the content of component (A) [(B) / (A)] is, from the viewpoint of antibacterial performance, preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.75 or more, and is preferably 3 or less, more preferably 2 or less, even more preferably 1 or less.

[0085] From the viewpoint of improving the dispersion stability of the component (A), the treatment liquid of the present invention contains the component (C) in an amount of preferably 10 ppm or more, more preferably 20 ppm or more, even more preferably 45 ppm or more, and preferably 800 ppm or less, more preferably 700 ppm or less, even more preferably 600 ppm or less.

[0086] When the treatment liquid of the present invention contains the component (C1) and the component (C2), the mass ratio of the content of the component (C1) to the content of the component (C2) in the treatment liquid of the present invention [(C1) / (C2)] is preferably 0.2 or more, more preferably 0.3 or more, and even more preferably 0.4 or more, from the viewpoint of further enhancing the antibacterial action of the component (B), and is preferably 1.2 or less, more preferably 1.1 or less, and even more preferably 1 or less, from the viewpoint of improving the dispersion stability of the component (A).

[0087] When the treatment liquid of the present invention contains component (D), from the viewpoint of improving low-temperature stability, the treatment liquid of the present invention contains component (D) in an amount of preferably more than 0 ppm, more preferably 10 ppm or more, and even more preferably 20 ppm or more, and from the viewpoint of improving the dispersion stability of component (A), the treatment liquid contains component (D) in an amount of preferably 500 ppm or less, more preferably 400 ppm or less, and even more preferably 300 ppm or less.

[0088] The textile product treatment method of the present invention can be carried out, for example, by incorporating it into the washing step or rinsing step of washing textile products. In this case, the washing conditions can be similar to those of ordinary washing. When the textile product treatment method of the present invention is incorporated into the washing step of washing, from the viewpoint of improving the handling ability for users, a treatment solution can be used in which the antibacterial composition of the present invention is diluted with water at a dilution ratio of preferably 500 times or more, more preferably 800 times or more, and preferably 5,000 times or less, more preferably 3,000 times or less. Furthermore, when the method for treating textile products of the present invention is incorporated into the rinsing step of laundry, from the viewpoint of improving the ease of handling for users, a treatment liquid can be used in which the antibacterial composition of the present invention is diluted with water at a dilution ratio of preferably 500 times or more, more preferably 800 times or more, and preferably 5,000 times or less, more preferably 3,000 times or less. [Example]

[0089] The antibacterial compositions of the Examples and Comparative Examples shown in Table 3 and the Formulation Examples shown in Table 4 were prepared using the following components.

[0090] <Component (A)> (A-1): Silica capsules containing a non-antibacterial oil agent manufactured by the <Manufacturing method of silica capsules> described below, volume average particle size 2.1 μm, non-antibacterial oil agent 90% by mass, silica 10% by mass (active ingredient amount) (A-2): Silica particles (Sunsphere H122, manufactured by Asahi Glass Co., Ltd., volume average particle diameter 12 μm)

[0091] <Method of manufacturing silica capsules> Silica capsules encapsulating a fragrance as an oil agent that does not exhibit antibacterial properties were produced by the following method.

[0092] (Process 1) An aqueous phase component was obtained by diluting 3.0 g of Coatamin 60W (trade name, manufactured by Kao Corporation, cetyltrimethylammonium chloride, active ingredient 30% by mass) with 750 g of ion-exchanged water. To this aqueous phase component was added an oil phase component prepared by mixing 200 g of a model oil solution in the proportions shown in Table 1 with 50 g of tetraethoxysilane (hereinafter also referred to as "TEOS"). The mixture was emulsified at 8,500 rpm using a homomixer (manufactured by HsiangTai, model: HM-310, the same applies hereinafter) to obtain an emulsion. The volume-average particle size of the emulsified droplets was 1.4 μm. The pH of the resulting emulsion was adjusted to 3.8 using a 1% aqueous sulfuric acid solution, and then transferred to a separable flask equipped with a stirring blade and a condenser. The liquid was stirred at 200 rpm for 24 hours while maintaining the liquid temperature at 30°C, yielding an aqueous dispersion containing silica capsules having a core made of a model oil and a first shell made of silica.

[0093] [Table 1]

[0094] (Process 2) While stirring the aqueous dispersion obtained in step 1 at a liquid temperature of 30°C, 21 g of TEOS was added dropwise over 420 minutes. After the addition, stirring was continued for an additional 17 hours and then cooled, resulting in the formation of a second shell encapsulating the first shell, yielding an aqueous dispersion containing silica capsules in which the model oil solution was encapsulated by amorphous silica. The volume-average particle diameter of the silica capsules was 2.1 μm. The volume-average particle diameters of the emulsified droplets and silica capsules were measured using a laser diffraction / scattering particle size distribution analyzer "LA-960" (trade name, manufactured by Horiba, Ltd.). Measurements were performed using a flow cell, with the medium set to water and the refractive index set to 1.40-0i. The emulsion or aqueous dispersion containing silica capsules was added to the flow cell, and measurements were performed at a concentration that showed a transmittance of approximately 90%, to determine the volume-average particle diameter. The thickness of the first shell was approximately 5 nm, and the thickness of the second shell was 5 to 30 nm.

[0095] <(B) component> (B-1): Dichrosan, TINOSAN HP100, manufactured by BASF

[0096] <(A) component + (B) component> (AB-1): Dichrosan-containing silica capsules: Silica capsules containing dichrosan, manufactured according to the method described below for manufacturing dichrosan-containing silica capsules, with a volume average particle size of 2 μm, dichrosan content of 4% by mass (content in silica capsules), and silica content of 10% by mass (content in silica capsules).

[0097] <Manufacturing method for dichrosan-containing silica capsules> Dichrosan-containing silica capsules were produced by the following method. (Process 1) An aqueous phase component was obtained by diluting 3.0 g of Coatamin 60W (trade name, manufactured by Kao Corporation, cetyltrimethylammonium chloride, active ingredient 30% by mass) with 750 g of ion-exchanged water. To this aqueous phase component was added 200 g of the diclosan diluted solution in the proportions shown in Table 2 and 50 g of TEOS to prepare an oil phase component. The mixture was emulsified using a homomixer at a rotation speed of 8,500 rpm to obtain an emulsion. The volume-average particle size of the emulsified droplets was 1.4 μm. The pH of the resulting emulsion was adjusted to 3.8, and then transferred to a separable flask equipped with a stirring blade and a condenser. The liquid was stirred at 200 rpm for 24 hours while maintaining the liquid temperature at 30°C, yielding an aqueous dispersion containing silica capsules having a core made of the dichlosan diluted solution and a first shell made of silica.

[0098] [Table 2]

[0099] (Process 2) While stirring the aqueous dispersion obtained in step 1 at a liquid temperature of 30°C, 21 g of TEOS was added dropwise over 420 minutes. After the addition, stirring was continued for an additional 17 hours, followed by cooling. This resulted in the formation of a second shell encapsulating the first shell, yielding an aqueous dispersion containing silica capsules in which the dichlosan dilution was encapsulated in amorphous silica. The volume-average particle diameter of the silica capsules was 2 μm. The volume-average particle diameters of the emulsified droplets and silica capsules were measured using a laser diffraction / scattering particle size distribution analyzer "LA-960" (trade name, manufactured by Horiba, Ltd.). Measurements were performed using a flow cell, with the medium set to water and the refractive index set to 1.40-0i. The emulsion or aqueous dispersion containing silica capsules was added to the flow cell, and measurements were performed at a concentration that showed a transmittance of approximately 90%, to determine the volume-average particle diameter. The thickness of the first shell was approximately 5 nm, and the thickness of the second shell was 5 to 30 nm.

[0100] <(C) component> [Component (C1): Anionic surfactant] (C1-1) Linear alkylbenzenesulfonic acid monoethanolamine salt, alkyl group carbon number 10-16 (C1-2) The mass ratio of the olefin form (potassium olefin sulfonate) to the hydroxy form (potassium hydroxyalkanesulfonate) in the C18IOS is 16 / 84. The mass ratio of the sulfonic acid groups in the HAS form in the C18IOS is as follows: 1st / 2nd / 3rd / 4th / 5th / 6th-9th = 1.5 / 22.1 / 17.2 / 21.8 / 13.5 / 23.9. The mass ratio of (IO-1S) / (IO-2S) is 1.6. The positional distribution of sulfonic acid groups in the HAS form contained in the C18IOS was measured using a liquid chromatograph mass spectrometer (hereinafter abbreviated as LC-MS). However, for internal olefin sulfonates with double bonds at positions 6 and above, the peaks overlapped and could not be clearly separated. The equipment and analytical conditions used for the measurement were as follows: [Measuring equipment] LC device: "LC-20ASXR" (Shimadzu Corporation) LC-MS device: "LCMS-2020" (manufactured by Shimadzu Corporation) Column: ODS Hypersil (length: 250 mm, inner diameter: 4.6 mm, particle size: 3 μm, manufactured by Thermo Fisher Scientific) Detector: ESI (-), m / z = 349.15 (C18), 321.10 (C16), 293.05 (C14) 〔solvent〕 Solvent A: 10 mM ammonium acetate aqueous solution Solvent B: acetonitrile / water = 95 / 5 solution with 10 mM ammonium acetate added [Elution conditions] Gradient: 60% solvent A, 40% solvent B (0-15 min) → 30% solvent A, 70% solvent B (15.1-20 min) → 60% solvent A, 40% solvent B (20.1-30 min) Flow rate: 0.5mL / min Column temperature: 40℃ Injection volume: 5 μL (C1-3) Fatty acid salts: Monoethanolamine neutralized salts of fatty acids with 10 to 18 carbon atoms. The fatty acid composition is decanoic acid / lauric acid / myristic acid / palmitic acid / stearic acid / linoleic acid / linolenic acid = 1 / 57 / 22 / 10 / 3 / 6 / 1 (mass ratio)

[0101] [Component (C2): Nonionic surfactant] (C2-1) In the general formula (C2-1), R 5c is a lauryl group, x is 0, y is 10, R 6c is hydrogen, (C2-2) In the general formula (C2-2-1), R 7c is a lauryl group, s1 is 0, t is 3.7, and s2 is 16.5, <Water> Ion-exchanged water

[0102] <Method for evaluating antibacterial activity> The antibacterial compositions shown in Table 3 were prepared using the above components, and the antibacterial activity of the antibacterial compositions was evaluated. This evaluation was also an evaluation when the antibacterial compositions were used as detergent compositions for textile products, and the antibacterial compositions can have excellent detergency and impart antibacterial properties to textile products. (1) Preparation of test cloth A 6 cm × 6 cm plain-woven cotton fabric (Cotton Fabric 2003 purchased from Tanigashira Shoten) was treated with each of the antibacterial compositions listed in Table 3 to prepare test fabrics for antibacterial testing. The water used was deionized water that had been sterilized by boiling at 100°C for 120 minutes, to which hardness components had been added to make the solution 5°DH (Ca / Mg = 7 / 3, mass ratio), to which sodium bicarbonate had been added to make the alkalinity 80 mg / L, and which had been adjusted to a pH of 7 with hydrochloric acid. Specifically, 600 g of water adjusted to pH 7 was poured into an agitator detergency tester (Tergotometer MS-8212, manufactured by Ueshima Seisakusho Co., Ltd.), 0.6 g of the antibacterial composition in Table 3 was added, and the mixture was agitated for 15 seconds. After agitation, 30 g of a 6 cm x 6 cm plain-woven cotton fabric was added, and the mixture was agitated for 10 minutes at 85 rpm. After agitation, the mixture was dehydrated for 1 minute in a two-tier washing machine (HITACHI PS-H35L), and then 600 g of the water adjusted to pH 7 was added to the Tergotometer again, and the mixture was agitated for 3 minutes at 85 rpm. After agitation, the mixture was dehydrated for 1 minute in a two-tier washing machine (HITACHI PS-H35L), and then dried flat in a constant temperature room (23°C, 40% RH) for 12 hours.

[0103] (2) Evaluation of antibacterial activity In evaluating the antibacterial activity of the antibacterial composition, the antibacterial effect against Staphylococcus aureus was evaluated. A bacterial solution (initial number of bacteria: 1.0 × 10) was added to 0.4 g of the test cloth treated with the antibacterial composition obtained in (1) above and 0.4 g of the untreated test cloth. 9CFU / mL) was inoculated into each sample and subjected to static culture at 37°C for 18 hours. 20 mL of LP dilution solution (Nihon Pharmaceutical Co., Ltd.) was added, and the mixture was subjected to ultrasonic irradiation for 10 minutes to extract the bacteria. The extract was serially diluted and mixed on SCD-LP agar medium (Nihon Pharmaceutical Co., Ltd.), followed by static culture at 37°C (1 day). The number of colonies obtained was counted, and the antibacterial activity value was calculated by subtracting the common logarithm of the number of viable bacteria obtained from the test cloth treated with the antibacterial composition of each Example or Comparative Example from the common logarithm of the number of viable bacteria obtained from the test cloth not treated with the antibacterial composition (logarithm). The results are shown in Table 3. In this evaluation, a higher antibacterial activity value indicates a composition with better antibacterial performance, and an antibacterial activity value of 2.0 or higher is preferred.

[0104] [Table 3]

[0105] Formulation examples of antibacterial compositions are shown in Table 4. The antibacterial compositions shown in Table 4 have excellent cleaning properties and can impart antibacterial properties to target surfaces such as textile products.

[0106] [Table 4]

Claims

1. An antibacterial composition comprising the following components (A), (B), and (C): Component (A): Silica Component (B): diphenyl ether compound Component (C): surfactant

2. The antibacterial composition according to claim 1 , wherein the component (C) comprises (C1) an anionic surfactant.

3. The antibacterial composition according to claim 2, wherein the component (C1) comprises at least one selected from linear alkylbenzenesulfonic acid, polyoxyethylene alkyl ether sulfate, polyoxypropylene polyoxyethylene alkyl ether sulfate, α-olefinsulfonic acid, internal olefinsulfonic acid, and salts thereof.

4. The antibacterial composition according to claim 1 or 2, wherein the component (C) comprises a nonionic surfactant (C2).

5. 3. The antibacterial composition according to claim 1 or 2, wherein the component (C) comprises an anionic surfactant (C1) and a nonionic surfactant (C2), and the mass ratio [(C1) / (C2)] of the content of the component (C1) to the content of the component (C2) in the composition is 0.2 or more and 1.2 or less.

6. The antibacterial composition according to claim 1 or 2, which is for use in textile products.

7. The antibacterial composition according to claim 1 or 2, which is a liquid.

8. A method for treating textile products, comprising contacting the textile products with the antibacterial composition according to claim 1 or 2.

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