Bleaching detergent composition and method for bleaching and cleaning mold stains

Abstract

To provide a bleaching detergent composition that has excellent bleaching and cleaning performance against mold stains occurring in hydrophobic resin parts such as silicone resins, and further has excellent storage stability of bleaching and cleaning components and viscosity, thereby allowing the effect to last for a long period of time.SOLUTION: A bleaching detergent composition comprises: component (a), 0.1 mass% or more and 10 mass% or less of an alkali metal hypochlorite; component (b), 0.1 mass% or more and 10 mass% or less of one or two or more quaternary ammonium salt-type surfactants selected from quaternary ammonium salts; component (c), an aromatic sulfonic acid or a salt thereof; component (d), an alkaline agent; and water, wherein the viscosity at 25°C is 1,000 mPa s or more and 100,000 mPa s or less, and the pH of a 10 mass% aqueous solution at 25°C is 11 or more and 14 or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a bleaching detergent composition and a method for bleaching and cleaning mildew stains. [Background technology]

[0002] In bathrooms, toilets, and kitchens, which are water-related residential facilities, water droplets adhere to the surfaces of the facilities due to splashes of water from faucets and showers during use, and the surfaces remain wet, creating an environment that is prone to the growth of bacteria and mold.In particular, mold stains are difficult to remove sufficiently with cleaning agents whose main components are surfactants, chelating agents, abrasives, etc., so bleaching compositions containing hypochlorite are generally used. The hard surfaces targeted by the bleaching agent compositions described above are not limited to horizontal surfaces but also include vertical and inclined surfaces, and various other product forms that can improve the adhesion and retention of bleaching ingredients are being considered, such as foam spray types using trigger containers and gel types with a high viscosity composition.

[0003] Patent Document 1 discloses a chlorine bleach composition containing (b) an alkali metal oxide and (c) a specific water-soluble solvent for use against mold that grows on silicone resin-based caulking, and the examples disclose a technology that shows even better effects when used in combination with a specific cationic surfactant. Patent Document 2 discloses a bleaching composition that contains (c) a tertiary amine oxide and (d) n-octyl sulfate, and that has excellent thickening properties, storage stability, and viscosity controllability by specifying the contents and mass ratios of the (c) component and the (d) component. Patent Document 3 discloses a thickened bleaching composition that contains an organic thickener, an alkali agent, a sulfonic acid compound, and its alkali metal salt, and that has a viscosity of 1,000 to 10,000 mPa·s at 25°C, thereby achieving excellent storage stability, bleaching properties, adhesion, and rinsability. Patent Document 4 describes a viscoelastic surfactant that uses a surfactant ion consisting of a hexadecyltrimethylammonium ion having 16 carbon atoms and an organic counter ion consisting of a p-toluenesulfonate ion, and associates with the surfactant in sodium hypochlorite to form a viscoelastic surfactant. The bleaching agent composition exhibits acceptable levels of bleach stability, phase stability, and viscosity stability over an extended period of time, and is available in the form of a non-mist spray or liquid that adheres to vertical surfaces without dripping, and can be applied to a variety of substrates using a dispensing device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-67806 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-277796 [Patent Document 3] Japanese Patent Application Laid-Open No. 2007-137930 [Patent Document 4] EP0298172A1 publication Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional chlorine bleaches have been effective enough against mold stains on tiles and joints, but in recent years there have been increasing cases of mold growing in the silicone resin caulking used in the joints of walls, bathtubs, etc., and it has been difficult to bleach or clean away mold that has grown in these resin parts. Patent Document 1 describes a liquid bleaching detergent composition that exhibits excellent bleaching power for bleaching mold that grows on silicone resin-based caulking, but in recent years, there has been a demand for further improvement in performance. Patent documents 2 and 3 describe technologies for thickening compositions to 1,000 mPa·s or more by using an amine oxide in combination with other agents or by using an organic thickener. Patent document 4 describes a thickening technology aimed at application to spray products using a dispensing device, and from the viewpoint of ease of discharge, etc., a technology for thickening compositions to 15.85 mPa·s or more at room temperature is used. -1 The goal is a viscosity of 500 mPa·s or less when measured at a shear rate of 100°C. However, it has been found that these technologies are insufficient in terms of effectiveness against mold that has grown on hydrophobic resins, a characteristic that has become a requirement in recent years. Furthermore, compositions with increased viscosity to improve adhesion and retention on the target object must also satisfy viscosity storage stability, meaning that the viscosity does not decrease during distribution, when in store inventory, or when used at home. Until now, no product has been found that combines excellent bleaching effectiveness against mold that has grown on hydrophobic resins with viscosity stability over time.

[0006] As a result of intensive research, the inventors of the present invention found that because silicone resins are hydrophobic, they create an environment in which hydrophilic sodium hypochlorite has difficulty acting on mold present on or inside the resin. Furthermore, they discovered that to solve this problem, it is important to achieve two goals: improving the retention of bleaching cleaning ingredients on hydrophobic surfaces and improving the effectiveness of bleaching cleaning ingredients on mold, which led to the present invention.

[0007] The present invention aims to further improve upon the problems of the prior art by providing a highly viscous bleaching detergent composition that exhibits excellent adhesion and retention on objects, has excellent bleaching and cleaning performance, decomposing and removing, i.e., cleaning, mold stains that have developed on hydrophobic resins such as silicone resins, and bleaching discoloration caused by mold on objects, and furthermore, has excellent storage stability in terms of the bleaching detergent ingredients and viscosity, allowing its effects to last for a long period of time. In this specification, "bleaching and cleaning" includes both cleaning of mold stains and bleaching of discoloration caused by mold. The performance of "bleaching and cleaning" is also referred to as "bleaching and cleaning performance." The bleaching and cleaning performance can be measured, for example, by the mold removal rate described in

[0076] . The mold removal rate encompasses both the effects of cleaning the mold stains and bleaching of discoloration caused by mold as a mold remover. [Means for solving the problem]

[0008] The present invention provides (a) component: 0.1% by mass or more and 10% by mass or less of an alkali metal hypochlorite salt; (b) component: 0.1% by mass or more and 10% by mass or less of the general formula (1) [ka] [R in the formula 1 R represents a linear or branched alkyl group having 8 to 22 carbon atoms. 2 R represents a linear or branched alkyl group having 1 to 12 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms. 3 and R 4 are the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms. - indicates the counter anion.] one or more quaternary ammonium salt surfactants selected from the group consisting of quaternary ammonium salts represented by the formula: (c) component: aromatic sulfonic acid or its salt, (d) Ingredients: alkaline agent, and water, wherein the viscosity at 25°C is 1,000 mPa·s or more and 100,000 mPa·s or less, and the pH of a 10% by mass aqueous solution at 25°C is 11 or more and 14 or less. The present invention also relates to a method for bleaching and cleaning mold stains, which comprises contacting the above bleaching detergent composition with mold stains that have developed on hydrophobic resin parts such as silicone resin-based caulking parts. [Effects of the Invention]

[0009] According to the present invention, the bleaching cleaning agent has excellent cleaning power against mold stains that have developed in hydrophobic resin parts such as silicone resins, and furthermore, the bleaching cleaning component and viscosity have excellent storage stability, so that the effect can be maintained for a long period of time. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing a discharge container with a sealing lid removed and a discharge port attached, according to an embodiment of the present invention; [Figure 2] 1 is a diagram showing a discharge container with a sealing lid attached and a discharge port attached, according to an embodiment of the present invention;

[0011] First, the bleaching detergent composition of the present invention will be described. The bleaching detergent composition of the present invention contains an alkali metal hypochlorous acid salt as a bleaching detergent component (a). Examples of alkali metals include lithium, sodium, and potassium. Sodium is preferred because of its easy availability. Sodium hypochlorite can be used in the form of an aqueous solution. In the sodium hypochlorite aqueous solution, sodium hypochlorite and equimolar amounts of sodium chloride may be present during production. To ensure storage stability while maintaining the bleaching and cleaning performance of sodium hypochlorite, a low sodium chloride content is preferable. Specifically, the sodium chloride content is preferably 10 mol% or more and 60 mol% or less, and preferably 10 mol% or more and 40 mol% or less, relative to the sodium hypochlorite content. Sodium hypochlorite with reduced sodium chloride content is commercially available as low-calorie sodium hypochlorite. In addition, commercially available sodium hypochlorite aqueous solutions may contain alkali metal hydroxide in advance to ensure storage stability. The bleaching detergent composition of the present invention may be used by blending it with a commercially available aqueous sodium hypochlorite solution.

[0012] The bleaching detergent composition of the present invention, component (a), is a composition containing an alkali metal hypochlorite. The amount of the alkali metal hypochlorite is the amount of active ingredient in the composition at the time of production, and in this application, is considered to correspond to the content in the composition. From the viewpoint of improving bleaching cleaning performance, the content of the alkali metal hypochlorite is 0.1 mass% or more, preferably 0.5 mass% or more, more preferably 1 mass% or more, and even more preferably 1.5 mass% or more, of the total amount of the bleaching detergent composition, and from the same viewpoint, it is 10 mass% or less, preferably 7.5 mass% or less, more preferably 5 mass% or less, and even more preferably 3 mass% or less. In the present invention, the content of component (a) is the value obtained by measuring the available chlorine concentration (Cl2) obtained by the method described in

[0078] and converting it into the formula weight of sodium hypochlorite (NaOCl).

[0013] Next, the quaternary ammonium salt surfactant of component (b) will be described. The bleaching detergent composition of the present invention comprises a compound represented by the general formula (1) [ka] [R in the formula 1 R represents a linear or branched alkyl group having 8 to 22 carbon atoms. 2 R represents a linear or branched alkyl group having 1 to 12 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms. 3 and R 4 are the same or different and each represents a straight-chain or branched alkyl group having 1 to 4 carbon atoms. - indicates the counter anion.] The surfactant contains one or more quaternary ammonium salt surfactants selected from the group consisting of quaternary ammonium salts represented by the formula:

[0014] Among these, from the viewpoint of improving bleaching and cleaning performance for mildew stains, one or more quaternary ammonium salt surfactants selected from quaternary ammonium salt surfactants represented by the following general formulas (1a) to (1c) are preferred. [ka] [R in the formula 1a R represents a linear or branched alkyl or alkenyl group having 14 to 22 carbon atoms. 2a , R 3a and R 4a are the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms. a - indicates the counter anion.] [ka] [R in the formula 1b and R 2b R may be the same or different and represent a linear or branched alkyl or alkenyl group having 8 to 12 carbon atoms. 3b and R 4b are the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms. b - indicates the counter anion.] [ka] [R in the formula 1c R represents a linear or branched alkyl or alkenyl group having 8 to 18 carbon atoms. 2c represents an aralkyl group having 7 to 12 carbon atoms. 3c and R 4c are the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms. c - indicates the counter anion.]

[0015] First, the quaternary ammonium salt surfactant of general formula (1a) will be explained. [ka] [R in the formula 1a R represents a linear or branched alkyl or alkenyl group having 14 to 22 carbon atoms. 2a , R 3a and R4a are the same or different and each represents a straight-chain or branched alkyl group having 1 to 4 carbon atoms. a - indicates the counter anion.]

[0016] R 1a represents a linear or branched alkyl or alkenyl group having from 14 to 22 carbon atoms. From the viewpoint of improving bleaching and cleaning performance, a linear alkyl group is preferred. Specific examples include myristyl (C14), pentadecyl (C15), cetyl (C16), heptadecyl (C17), stearyl (C18), nonadecyl (C19), arachidyl (C20), heneicosanyl (C21), and behenyl (C22) groups. Among these, from the viewpoint of improving bleaching and cleaning performance and easy availability, one or more selected from myristyl (C14), cetyl (C16), and stearyl (C18) groups are preferred, and one or more selected from cetyl and stearyl groups are more preferred.

[0017] R 2a , R 3a , and R 4a are the same or different and represent straight-chain or branched alkyl groups having from 1 to 4 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, a 1-methylethyl group, a butyl group, a 1-methylpropyl group, a 2-methylpropyl group, and a 1,1-dimethylethyl group. Among these, from the viewpoints of improving bleaching and cleaning performance and easy availability, one or more selected from a methyl group and an ethyl group are preferred, and a methyl group is more preferred.

[0018] X a - represents a counter anion. Examples of the counter anion include inorganic anions such as fluoride ion, chloride ion, bromide ion, iodide ion, and hydroxide ion, and organic anions such as methyl sulfate ion, ethyl sulfate ion, acetate ion, and acetylacetonate ion. From the viewpoint of easy availability, inorganic anions are preferred, and chloride ion is more preferred.

[0019] Specific compounds of the general formula (1a) include myristyltrimethylammonium salt, cetyltrimethylammonium salt, stearyltrimethylammonium salt, The counter anion X of these salts can be selected from the following compounds: a - is a halide ion such as chloride ion or bromide ion, or an ethyl sulfate ion.

[0020] The quaternary ammonium salt surfactant of general formula (1a) may be used alone or in combination of two or more. When two or more types are used in combination, there is no limitation on the mixing ratio (mass ratio).

[0021] From the viewpoint of improving bleaching and cleaning performance, the content of cetyltrimethylammonium salt and stearyltrimethylammonium salt in the quaternary ammonium salt surfactant of general formula (1a) may be preferably 50% by mass or more, more preferably 65% ​​by mass or more, even more preferably 80% by mass or more, and still more preferably 100% by mass.

[0022] From the viewpoint of improving bleaching and cleaning performance, it is preferable to use a mixture of cetyltrimethylammonium salt and stearyltrimethylammonium salt.

[0023] Next, the quaternary ammonium salt surfactant of general formula (1b) will be described. [ka] [R in the formula 1b and R 2b R may be the same or different and represent a linear or branched alkyl or alkenyl group having 8 to 12 carbon atoms. 3b and R 4b are the same or different and each represents a straight-chain or branched alkyl group having 1 to 4 carbon atoms. b - indicates the counter anion.]

[0024] R1b and R 2b are the same or different and represent a straight-chain or branched alkyl or alkenyl group having from 8 to 12 carbon atoms. From the viewpoint of improving bleaching and cleaning performance, a straight-chain alkyl group is preferred. Specific examples include an octyl group (C8), a nonyl group (C9), a decyl group (C10), an undecyl group (C11), and a lauryl group (C12). Among these, from the viewpoints of good bleaching and cleaning performance and easy availability, one or more selected from the group consisting of an octyl group (C8), a decyl group (C10), and a lauryl group (C12) are preferred.

[0025] R 3b and R 4b are the same or different and represent straight-chain or branched alkyl groups having from 1 to 4 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, a 1-methylethyl group, a butyl group, a 1-methylpropyl group, a 2-methylpropyl group, and a 1,1-dimethylethyl group. Among these, from the viewpoints of improving bleaching and cleaning performance and easy availability, one or more selected from a methyl group and an ethyl group are preferred, and a methyl group is more preferred.

[0026] X b - represents a counter anion. Examples of the counter anion include inorganic anions such as fluoride ion, chloride ion, bromide ion, iodide ion, and hydroxide ion, and organic anions such as methyl sulfate ion, ethyl sulfate ion, acetate ion, and acetylacetonate ion. From the viewpoint of easy availability, inorganic anions are preferred, and chloride ion is more preferred.

[0027] Specific examples of the compound of general formula (1b) include one or more compounds selected from N,N-dioctyl-N,N-dimethylammonium salt, N,N-didecyl-N,N-dimethylammonium salt, and N,N-didecyl-N-ethyl-N-methylammonium salt. b - is a halide ion such as chloride ion or bromide ion, or an ethyl sulfate ion.

[0028] The quaternary ammonium salt surfactant of general formula (1b) may be used alone or in combination of two or more. When two or more types are used in combination, there is no limitation on the mixing ratio (mass ratio).

[0029] Next, the quaternary ammonium salt surfactant of general formula (1c) will be described. [ka] [R in the formula 1c R represents a linear or branched alkyl or alkenyl group having 8 to 18 carbon atoms. 2c represents an aralkyl group having 7 to 12 carbon atoms. 3c and R 4c are the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms. c - indicates the counter anion.]

[0030] R 1c represents a linear or branched alkyl or alkenyl group having from 8 to 18 carbon atoms. A linear alkyl group is preferred in terms of improving bleaching and cleaning performance. Specific examples include octyl (C8), nonyl (C9), decyl (C10), undecyl (C11), lauryl (C12), tridecyl (C13), myristyl (C14), pentadecyl (C15), cetyl (C16), heptadecyl (C17), stearyl (C18), nonadecyl (C19), arachidyl (C20), heneicosanyl (C21), and behenyl (C22). Among these, from the viewpoints of improving bleaching and cleaning performance and easy availability, one or more groups selected from the group consisting of octyl group (C8), decyl group (C10), lauryl group (C12), myristyl group (C14), cetyl group (C16), and stearyl group (C18) are preferred.

[0031] R 2crepresents an aralkyl group having 7 to 12 carbon atoms. Specific examples include a benzyl group, a (2-methylphenyl)methyl group, a (4-methylphenyl)methyl group, a (1-naphthyl)methyl group, a (2-naphthyl)methyl group, a phenylethyl group, a (2-methylphenyl)ethyl group, a (4-methylphenyl)ethyl group, a (1-naphthyl)ethyl group, and a (2-naphthyl)ethyl group. Of these, a benzyl group is preferred from the viewpoints of improving bleaching and cleaning performance and easy availability.

[0032] R 3c and R 4c are the same or different and represent straight-chain or branched alkyl groups having from 1 to 4 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, a 1-methylethyl group, a butyl group, a 1-methylpropyl group, a 2-methylpropyl group, and a 1,1-dimethylethyl group. Among these, from the viewpoints of improving bleaching and cleaning performance and easy availability, one or more selected from a methyl group and an ethyl group are preferred, and a methyl group is more preferred.

[0033] X c - represents a counter anion. Examples of the counter anion include inorganic anions such as fluoride ion, chloride ion, bromide ion, iodide ion, and hydroxide ion, and organic anions such as acetate ion and acetylacetonate ion. From the viewpoint of easy availability, inorganic anions are preferred, and chloride ion is more preferred.

[0034] Specific examples of the compound of general formula (1c) include, but are not limited to, alkyldimethylbenzylammonium salts, in which the alkyl group is one or more selected from octyl, lauryl, myristyl, cetyl, and stearyl groups, and benzalkonium chloride, known as a mixture thereof.

[0035] The quaternary ammonium salt surfactant of general formula (1c) may be used alone or in combination of two or more. When two or more types are used in combination, there is no limitation on the mixing ratio (mass ratio).

[0036] The quaternary ammonium salt surfactant of component (b) may be one selected from the quaternary ammonium salt surfactants (1a) to (1c), or two or more may be blended or contained independently or in admixture. When two or more types are used in admixture, there are no limitations on the blending ratio (mass ratio). When used in admixture, each quaternary ammonium salt surfactant may be one type, or two or more types may be mixed. From the viewpoint of improving bleaching and cleaning performance, it is preferable to use one or two or more types selected from the quaternary ammonium salt surfactants (1a).

[0037] The bleaching detergent composition of the present invention is a composition containing a quaternary ammonium salt surfactant as component (b). The amount of the quaternary ammonium salt surfactant is the amount of active ingredient at the time of production of the composition, which corresponds to the content in the composition. The content of the quaternary ammonium salt surfactant of component (b) in the total amount of the bleach detergent composition is 0.1 mass% or more, preferably 0.5 mass% or more, more preferably 1 mass% or more, and even more preferably 2 mass% or more, from the viewpoint of improving bleach cleaning performance, and from the same viewpoint, is 10 mass% or less, preferably 7.5 mass% or less, and more preferably 5 mass% or less.

[0038] The bleach detergent composition of the present invention may contain a quaternary ammonium salt surfactant other than component (b) within a range that does not impair the effects of the present invention. The content of the quaternary ammonium salt surfactant other than component (b) in the total quaternary ammonium salt surfactants is preferably 10% by mass or less, more preferably 1% by mass or less, and preferably substantially 0% by mass.

[0039] Next, the aromatic sulfonic acid or its salt, component (c), will be described. Examples of aromatic sulfonic acids or salts thereof as component (c) include aromatic sulfonic acids or salts thereof such as benzene derivative sulfonic acids, naphthalene derivative sulfonic acids, biphenyl derivative sulfonic acids, and pyridine derivative sulfonic acids. In the present invention, the term "derivative" refers to a compound in which one or more hydrogen atoms bonded to an aromatic hydrocarbon group such as the benzene ring are substituted with a hydrocarbon group having 1 to 3 carbon atoms. From the viewpoints of improving bleaching and cleaning performance and easy availability, benzene derivative sulfonic acids or salts thereof are preferred. Among these, sulfonic acids represented by the general formula (2) [ka] [In the formula, n is an integer of 0 or more and 4 or less. R 5 represents an alkyl or alkenyl group having 1 to 3 carbon atoms. When n is 2 or more, R 5 may be the same or different. M represents a hydrogen atom or a counter cation. The benzene derivative sulfonic acid or its salt, represented by the formula:

[0040] n is an integer of 0 or more and 4 or less, and is preferably 0, 1 or 2 from the viewpoint of improving bleaching and cleaning performance.

[0041] R 5 represents an alkyl group or alkenyl group having 1 to 3 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, a 1-methylethyl group, a vinyl group, and a 1-propenyl group. From the viewpoint of improving bleaching and cleaning performance, a methyl group or a vinyl group is preferred.

[0042] M represents a hydrogen atom or a counter cation. When M is a counter anion, the salt is sometimes called an aromatic sulfonate. Examples of the counter cation of the aromatic sulfonate include monovalent inorganic cations such as lithium ion, sodium ion, and potassium ion; divalent inorganic cations such as magnesium ion and calcium ion; trivalent inorganic cations such as aluminum; and organic cations such as mono-, di-, tri-, or tetra(alkyl having 1 to 4 carbon atoms)ammonium ion and mono-, di-, tri-, or tetra(aryl having 6 to 12 carbon atoms)ammonium ion.

[0043] From the viewpoint of improving bleaching and cleaning performance, inorganic cations are preferred, monovalent inorganic cations are more preferred, and sodium ions are even more preferred. Aromatic sulfonates having one or more of these counter cations may be blended or contained independently or in combination. When mixed, there are no particular restrictions on the content ratio.

[0044] Furthermore, an aromatic sulfonic acid in which M is a hydrogen atom may be mixed with the above-mentioned aromatic sulfonate salt and used in combination. When mixed, there is no particular limitation on the content ratio.

[0045] From the viewpoint of improving bleaching and cleaning performance, the aromatic sulfonic acid or salt thereof of component (c) is preferably one or more selected from p-toluenesulfonic acid or its sodium salt, and m-xylene-4-sulfonic acid or its salt.

[0046] The bleach detergent composition of the present invention is a composition containing component (c), an aromatic sulfonic acid or a salt thereof. The amount of aromatic sulfonic acid or a salt thereof is the amount of active ingredient at the time of production of the composition, which corresponds to the content in the composition. From the viewpoint of improving bleaching cleaning performance, the content of the aromatic sulfonic acid or its salt as component (c) is preferably 0.1 mass% or more, more preferably 0.3 mass% or more, even more preferably 0.5 mass% or more, and still more preferably 0.8 mass% or more of the total amount of the bleaching detergent composition, and from the same viewpoint, it is preferably 10 mass% or less, more preferably 8 mass% or less, and even more preferably 6 mass% or less. The content of component (c) in the present invention means the content calculated as aromatic sulfonic acid.

[0047] From the viewpoints of improving the viscosity immediately after preparation, the storage stability of the viscosity of component (a) and the bleaching detergent composition of the present invention, and bleaching cleaning performance, the molar ratio of the content of component (c) to the content of component (b), (c) / (b), is preferably 0.35 or more, more preferably 0.45 or more, even more preferably 0.5 or more, still more preferably 0.55 or more, and still more preferably 0.65 or more. From the same viewpoints, it is preferably 5 or less, more preferably 4.5 or less, even more preferably 4 or less, still more preferably 3.5 or less, and still more preferably 2.9 or less.

[0048] Next, the alkaline agent of component (d) will be described. Examples of alkaline agents include inorganic alkaline agents such as sodium hydroxide, sodium silicate, sodium bicarbonate, sodium carbonate, potassium hydroxide, potassium bicarbonate, and potassium carbonate, and organic alkaline agents such as ammonium hydroxide, monoethanolamine, diethanolamine, triethanolamine, and trishydroxymethylaminomethane. Inorganic alkaline agents are preferred from the viewpoint of easy availability. From the viewpoint of improving the storage stability of the alkaline agent in the bleach detergent and the storage stability of component (a), one or more selected from sodium hydroxide, sodium silicate, and potassium hydroxide are more preferred, and sodium hydroxide is even more preferred from the viewpoint of economy. These alkaline agents are preferably used as aqueous solutions from the viewpoint of convenience in production.

[0049] The bleaching detergent composition of the present invention is a composition containing an alkaline agent (component (d)). The amount of the alkaline agent is the amount of the active ingredient at the time of production of the composition, which corresponds to the content in the composition. The content of the alkaline agent (component (d)) is related to the amount of hydroxide ions, i.e., free alkali, present in the bleach detergent composition of the present invention. This corresponds to the amount necessary for the pH of a 10% by weight aqueous solution of the bleach detergent composition of the present invention at 25°C to satisfy the following range. That is, from the viewpoint of improving the storage stability of viscosity and bleaching performance (described below), the content of the alkaline agent is preferably 0.2% by weight or more, more preferably 0.4% by weight or more, even more preferably 0.6% by weight or more, and even more preferably 0.9% by weight or more, relative to the bleach detergent composition. From the same viewpoint, the content of the alkaline agent (component (d)) is preferably 6.0% by weight or less, more preferably 5.0% by weight or less, and even more preferably 4.0% by weight or more. The content of component (d) in the bleach detergent composition of the present invention is determined by measuring the free alkali (neutralization titration method, converted into sodium hydroxide) according to the Sodium Hypochlorite Standard for Water Supply (JWWAK120).

[0050] The pH of the bleaching detergent composition of the present invention, when prepared as a 10% by mass aqueous solution, at 25°C is 11 or more, preferably 11.5 or more, from the viewpoint of improving bleaching cleaning performance, and from the same viewpoint, 14 or less, preferably 13 or less.

[0051] The viscosity of the bleach detergent composition of the present invention at 25°C is 1,000 mPa·s or more, preferably 1,200 mPa·s or more, more preferably 3,000 mPa·s or more, even more preferably 5,000 mPa·s or more, and even more preferably 7,000 mPa·s or more, from the same viewpoint, 100,000 mPa·s or less, preferably 80,000 mPa·s or less, more preferably 50,000 mPa·s or less, and even more preferably 30,000 mPa·s or less. Furthermore, from the viewpoint of achieving both bleach detergent performance and ease of handling, a viscosity of 1,000 mPa·s or more and 10,000 mPa·s or less is preferred. The viscosity of the present invention refers to a viscosity that is not limited by the time elapsed, such as immediately after manufacture, during distribution, while in store inventory, or at the time of home use. The viscosity may be at any time, and the time elapsed is not particularly limited.

[0052] The viscosity at 25°C can be measured using a Brookfield viscometer, specifically, by the method described in the Examples. The viscosity within the above range can be achieved by incorporating a specific cationic surfactant (component (b)) and an aromatic sulfonic acid (component (c)) at specific contents and ratios. While the mechanism is unclear, it is presumed that the high viscosity is the result of a specific association state formed between the compounds due to hydrophobic interactions, electrostatic interactions, or the like. By achieving the above viscosity, the bleaching detergent composition can be applied in gel form or sprayed from a trigger container, even when the object to be cleaned of mold stains or bleached due to mold is a vertical or inclined surface. Furthermore, after application or spraying to a vertical or inclined surface, the bleaching detergent composition can be allowed to remain on the object for a period of time during which its effectiveness is maximized.

[0053] Furthermore, the present invention is characterized by its excellent storage stability of the bleaching detergent component and viscosity, allowing its effects to last for a long period of time. Conventionally, bleaching detergent compositions containing hypochlorite have had the problem that even if the viscosity is increased, the molecules that contribute to thickening are cleaved by the hypochlorite, causing a decrease in viscosity. In other words, the storage stability of the bleaching detergent component and viscosity is low, resulting in poor lasting effects. The sustained effect in the present invention can be quantified, for example, by calculating the ratio of the bleaching and cleaning performance after storage to the bleaching and cleaning performance immediately after preparation of the bleaching and cleaning agent composition as follows. Durability (%) = (bleaching and cleaning performance after storage) / (bleaching and cleaning performance immediately after preparation) × 100 For example, when the mildew removal rate described in

[0076] is used as an index of bleaching cleaning performance, the sustained effect is calculated by the following formula. Durability of mold removal rate (%) = (Mold removal rate after storage) / (mold removal rate immediately after preparation) x 100

[0054] In order to adjust the viscosity of the bleaching detergent composition to the above-mentioned range, thickeners such as polyacrylates, cellulose derivatives, xanthan gum, guar gum, carboxymethylcellulose, polyethylene glycol, and hydroxypropylmethylcellulose may be blended or contained as other components. The bleaching detergent composition of the present invention may be substantially free of the thickener, i.e., the content may be 0% by mass. When a thickener is contained, the content of the thickener is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and even more preferably 0.1% by mass or less, from the viewpoint of storage stability of the bleaching detergent components and viscosity. When the thickener is an ionic compound, the content is expressed as a molecular weight equivalent of an acid or base type non-ionic compound.

[0055] The remainder of the bleach detergent composition of the present invention, other than components (a), (b), (c), (d), and other components, can be water. That is, the bleach detergent composition of the present invention is a composition containing water. The amount of water is the amount of water added in terms of active ingredients at the time of production of the composition (however, this includes the amount of water carried over from the blending raw materials for other components), which corresponds to the content of water in the composition. The water content in the composition is preferably 65% ​​by mass or more, more preferably 75% by mass or more, and even more preferably 80% by mass or more, from the viewpoints of the specific viscosity of the present application and the solubility of the composition in water, and from the same viewpoints, is preferably 98% by mass or less, more preferably 96% by mass or less, and even more preferably 94% by mass or less.

[0056] The bleaching detergent composition of the present invention may further contain additives such as foaming agents, foaming agents, penetrating agents, chelating agents, dispersants, binder resins, fragrances, antifungal agents, antibacterial agents, etc. In other words, the bleaching detergent composition of the present invention is a composition containing these additives. The amount of the additive is the amount of the additive in terms of active ingredient at the time of production of the composition, which corresponds to the content in the composition. When these components are contained, the content in the composition is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less.

[0057] The bleaching detergent composition of the present application can be used as a mold remover for the purpose of cleaning mold stains and bleaching discoloration caused by mold. Examples of mold include black mold that tends to grow in wet areas, green mold that tends to grow on wood, and yellow mold that grows on glass, film, metal, etc. Specific microbial species include one or more fungi selected from the genera Cladosporium, Aspergillus, Candida, Penicillium, Alternaria, Phoma, Exophiala, and Aureobasidium.

[0058] Target objects for the mold remover include bathroom tile joints, walls and floors, washroom, kitchen, and toilet walls and floors, wallpaper, building materials, wood, flooring, decorative plywood for furniture and building materials, aluminum materials such as aluminum sashes and architectural aluminum panels, resin moldings, plumbing supplies, feed containers, air conditioning air duct components that constitute the air conditioning air ducts of air conditioners, steel products, house wrap, roofing materials, heat insulation materials, kitchenware, toilet supplies, indoor items, bedding, filters, toys, leather products such as synthetic leather and natural leather, etc. Target objects also include textile products such as fabrics and towels, resin films attached to walls, and laminates such as tarpaulins laminated on the resin films, etc.

[0059] It is particularly effective against black mold that grows on fixed objects such as tile joints, walls, floors, etc. in bathrooms, and walls and floors in washrooms, kitchens, toilets, etc. Furthermore, it is effective against black mold on hydrophobic resin parts such as polymer films such as polyvinyl chloride, olefin-based elastomers, polyurethane, and polyester, and silicone resin-based caulking parts.

[0060] Next, a method for bleaching and cleaning mold using the bleach detergent composition of the present application will be described. The types of mold and target objects in the method for bleaching and cleaning mold using the bleach detergent composition of the present application can include the types of mold and target objects exemplified above in the description of the mold remover. Specifically, examples of the types of mold include black mold, green mold, yellow mold, etc., and specific microbial species include one or more fungi selected from the genera Cladosporium, Aspergillus, Candida, Penicillium, Alternaria, Phoma, Exophiala, and Aureobasidium. The bleach detergent composition is also effective for treating black mold that has grown on fixed objects such as tile joints, walls, and floors in bathrooms, and walls and floors in washrooms, kitchens, and toilets. Furthermore, it is effective for use against black mold on hydrophobic resin parts such as polymer films of polyvinyl chloride, olefin elastomers, polyurethane, polyester, etc., and silicone resin caulking parts.

[0061] The bleaching detergent composition of the present application is also effective for bleaching discoloration caused by microorganisms other than mold, such as pink discoloration caused by specific yeasts or bacteria. Examples of yeasts that cause pink discoloration include one or more yeasts selected from the genera Rhodotorula, Rhodosporidium, Sporobolomyces, and Sporidiobolus. Examples of bacteria that cause pink discoloration include one or more bacteria selected from the genera Methylobacterium, Brevundimonas, and Microbacterium.

[0062] The bleach detergent composition of the present application has a moderate viscosity. Therefore, the composition becomes gel-like, which is particularly effective when the fixed object is on a vertical or inclined surface. When contacting the bleach detergent composition of the present application with mold on an object, a discharge container that can pinpoint-apply the gel-like contents to the object can be used. As the discharge container, a tube container is preferably used from the viewpoints of ease of handling and application, taking safety into consideration. When using a tube container, the hole diameter (diameter) of the circular discharge outlet is preferably 0.4 mm or more, more preferably 0.7 mm or more, and even more preferably 1.0 mm or more, from the viewpoint of easily dispensing the required amount. Furthermore, from the viewpoint of preventing the discharge of an amount greater than necessary, the hole diameter is preferably 5.0 mm or less, more preferably 4.0 mm or less, and even more preferably 3.0 mm or less. That is, the area of ​​the circular discharge outlet is preferably 0.13 mm or less. 2 More than 0.38mm, preferably 0.38mm 2 More preferably, 0.79 mm 2 or more, preferably 19.6 mm 2 Less than or equal to 12.6 mm, preferably 2 Less than 7.1 mm, more preferably 2 The following is the result. Furthermore, if the outlet of the tube container is not a perfect circle but has another shape, such as an ellipse, star, or square, the area of ​​the outlet may be within the preferred range of the area of ​​the above-mentioned perfect circle outlet.

[0063] The bleach detergent composition of the present application can be filled into a discharge container having the above-mentioned discharge outlet to form a bleach detergent article. As shown in Fig. 1, the bleach detergent composition of the present application can be filled into a discharge container 1 having the hole diameter of 2 described above to form a bleach detergent article. From the viewpoint of convenience, when forming the bleach detergent article, the length 4 from the bottom of the discharge container to the tip of the discharge outlet is set to 60 to 250 mm, the maximum width 5 of the discharge container is set to 20 to 70 mm, and the capacity is set to 60 to 500 cm 3This is preferable because the product can be used multiple times by filling 60 to 500 g of the composition into the dispensing container 1. In addition, the container preferably has a sealable lid 3 that can be sealed, as shown in Figure 2, in order to prevent changes in the performance and physical properties of the bleach detergent composition over time. The container is preferably made of one or more materials selected from high-density polyethylene (HDPE) and low-density polyethylene (LDPE), more preferably high-density polyethylene. The materials may be used alone or in combination, and may be molded into a single layer or multiple layers.

[0064] In addition, the bleaching detergent composition of the present invention is applied to the object in an amount of 0.5 to 3 mL / cm. 2 By applying this product, it is possible to effectively clean mold stains and bleach discoloration caused by mold.

[0065] The bleaching detergent composition of the present invention can be applied to an object and then left to stand for a certain period of time to allow the bleaching detergent composition to remain on the object, thereby more effectively cleaning mold stains and bleaching discoloration caused by mold. From the viewpoint of improving the bleaching effect, the leaving time is preferably 5 minutes or more, more preferably 30 minutes or more, even more preferably 50 minutes or more, still more preferably 120 minutes or more, and even more preferably 720 minutes (half a day) or more.

[0066] The bleaching detergent composition of the present application can be applied to an object on which mold has grown, left to stand for a certain period of time to allow the bleaching detergent composition to remain on the object, and then the object to which the bleaching detergent composition has been applied can be brought into contact with water to perform cleaning such as removing mold stains. Examples of the contact method include washing with water, which may be immersion or running water.

[0067] <Examples and Comparative Examples> EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to the following descriptions.

[0068] The ingredients used are as follows: (a) Ingredients (a-1) Sodium hypochlorite: "Low-cooking sodium hypochlorite" (sodium hypochlorite content 12.5% ​​by mass), manufactured by Nankai Chemical

[0069] (b) Component (b-1) Myristyltrimethylammonium chloride: manufactured by Tokyo Chemical Industry Co., Ltd. (b-2) Cetyltrimethylammonium chloride: manufactured by Tokyo Chemical Industry Co., Ltd. (b-3) Stearyltrimethylammonium chloride: manufactured by Tokyo Chemical Industry Co., Ltd.

[0070] (c) Component (c-1) p-Toluenesulfonic acid: Meiyu Sangyo Co., Ltd., PTS-70 (c-2) m-Xylene-4-sulfonic acid: SXA-60, manufactured by Itochu Chemical Frontier (c-3) Sodium p-toluenesulfonate: Fujifilm Wako Pure Chemical Industries, Ltd. (d) Ingredient: Sodium hydroxide (e) Ingredient: Thickener: Acrylic acid / C10-C30 alkyl acrylic acid copolymer: Lubriol, Carbopol EDT2020

[0071] The bleach detergent compositions shown in Table 1 were prepared using the above ingredients, and the pH and viscosity were measured immediately after preparation. 200 g of the composition was filled into a tube container (diameter φ5 mm), sealed, and left to stand at room temperature for one week. After that, the cap was opened with the tube mouth facing straight down, and it was confirmed that the composition did not drip due to gravity for one minute or more, thereby visually confirming that it was a gel-like liquid. The content of each component in Table 1 is the content (active component) of each component in 100 parts by mass of the bleach detergent composition, expressed as % by mass. <Production example> Taking Example 1 as an example, the preparation method is shown below. To a required amount of ion-exchanged water for the bleaching detergent composition to total 100% by mass, a predetermined amount of sodium hydroxide as component (d) was added and dissolved. To the obtained aqueous sodium hydroxide solution, p-toluenesulfonic acid as component (c) in a predetermined amount was added as a 70% by mass aqueous solution, and cetyltrimethylammonium chloride and stearyltrimethylammonium chloride as component (b) were sequentially added, and the mixture was stirred and dissolved so that the composition with increased viscosity became uniform. After previously checking the pH of the composition before adding sodium hypochlorite, finally, a predetermined amount of sodium hypochlorite as component (a) was added and thoroughly stirred to obtain a bleaching detergent composition.

[0072] <Appearance> Using each of the produced bleaching detergent compositions, the appearance such as a gel-like liquid and a low-viscosity liquid was visually evaluated by the determination evaluation of the liquid dripping property when the composition filled in the tube container was directed downward. <pH Measurement Method> Each of the produced bleaching detergent compositions was made into a 10% by mass aqueous solution using ion-exchanged water, and the pH was measured under the condition of 25°C. The pH value at 25°C was the value measured using a pH meter (manufactured by Toa DKK Corporation), and it was the value after 1 minute when the electrode of the pH meter was immersed in the above aqueous solution.

[0073] <Viscosity Measurement Method> The viscosity of each of the produced bleaching detergent compositions was measured using a B-type viscometer TVB-10M under the conditions of rotor M4, 30 rpm, 1 minute, and 25°C. In addition, for compositions with a high viscosity of 20,000 mPa·s or more that could not be measured under the above conditions, the values measured after changing the rotation speed to 12 rpm or 6 rpm were used. The measurement was carried out after maintaining the temperature-controlled state at 25°C for 30 minutes. Also, for compositions in which bubbles were observed, the measurement was carried out after standing overnight to defoam.

[0074] According to the above production example, the compositions of Examples 1 to 7 and Comparative Examples 1 to 4 shown in Table 1 were produced. The compositions of Examples 1 to 7 and Comparative Examples 3 and 4 were confirmed to be gel-like liquids by visual inspection using tube containers. On the other hand, the compositions of Comparative Examples 1 and 2 were low-viscosity liquids, dripping as soon as the opening of the tube was tilted straight down. As will be described later, the viscosity of the compositions of Comparative Examples 3 and 4 decreased after 20 days of storage at 50°C, which is an accelerated test condition equivalent to long-term storage at room temperature.

[0075] Using some of the bleach detergent compositions in Table 1, the mold removal rate immediately after production was measured as an index of bleach cleaning performance. Furthermore, the mold removal rate, viscosity, and residual rate of sodium hypochlorite (component (a)) were measured after storing the bleach detergent compositions at 50°C for 20 days. Furthermore, the storage stability of the gel liquid was confirmed by evaluating the dripping property when the composition filled in a tube container (diameter φ1 mm) was turned directly downward as described above.

[0076] <Measurement of mold removal rate> Test specimens were prepared by solidifying common household silicone caulking (manufactured by Konishi, product name: Bond Silicone Coke White, product number: #55778) at room temperature (25°C) and cutting it into approximately 1.5 cm squares. Cladosporium sp. PA-4, an environmental isolate of the genus Cladosporium, which is a preferred fungus for residential environments, was cultured on potato dextrose agar plates (prepared according to the package insert using Becton Dickinson's Potato Dextrose Agar Reagent) for one month at 25°C. The test specimens were then placed on the silicone caulking, allowing mold to grow on the entire surface. Test specimens with mold stains that had penetrated the surface and interior of the silicone caulking were collected and cut into approximately 5 mm squares to serve as evaluation samples. The bleach detergent composition was filled into a tube (diameter φ1 mm) and 100 μL of the composition was extruded and applied to the evaluation sample prepared by the above method. After leaving it for 60 minutes, it was washed with water and air-dried, and the removal rate was calculated by image analysis before and after treatment. The image analysis was performed using the scanner function of a RICOH printer (MP C5504), capturing an image of the sample, measuring the gray value with Image J, and using the following calculation formula. Mold removal rate (%) = [(gray value after treatment) - (gray value before treatment)] / (gray value of new silicone piece) - (gray value before treatment) × 100 The mildew removal rate after storing the bleach detergent composition in a sealed container at 50°C for 20 days was also measured in the same manner. A larger value indicates better mildew removal ability. The sustained effect of mold removal rate was calculated using the following formula. Durability of mold removal rate (%) = (Mold removal rate after storage) / (mold removal rate immediately after preparation) x 100

[0077] <Residual rate of component (a) after 20 days of storage at 50°C> In an accelerated test aimed at predicting the remaining amount of bleaching detergent components after long-term storage at room temperature, a bleaching detergent composition was stored at 50°C for 20 days, and the remaining available chlorine concentration was measured using the following method. The ratio of the remaining available chlorine concentration after storage to the initial available chlorine concentration was defined as the residual rate of component (a). A larger value indicates better storage stability of the bleaching detergent components.

[0078] <Method for measuring available chlorine concentration> 0.3 g of bleaching detergent composition was mixed with 100 mL of ion-exchanged water and stirred for approximately 10 minutes to completely dissolve. 0.2 g of potassium iodide (Fujifilm Wako Pure Chemical Industries, Ltd.), 20 mL of 10% sulfuric acid (Fujifilm Wako Pure Chemical Industries, Ltd.), and 5 drops of starch indicator (Sigma-Aldrich) were added and completely dissolved, and titration was performed with 0.1 M sodium thiosulfate (Fujifilm Wako Pure Chemical Industries, Ltd.) using a titration burette. The available chlorine concentration in the cleaning solution was calculated from the amount of sodium thiosulfate used in the titration.

[0079] The viscosity after 20 days of storage at 50°C was measured in accordance with the method for measuring the viscosity of the bleach detergent composition immediately after production.

[0080] The results of the measurements and evaluations are shown in Table 1. The content of component (d) (sodium hydroxide) in the table was measured using the free alkali measurement (neutralization titration method) in the sodium hypochlorite standard for water supply (JWWAK120) and converted to the amount of sodium hydroxide. The value in parentheses is the blending amount (mass%) of component (d). [Table 1]

[0081] As shown in Table 1, in the Examples, a high mold removal rate was achieved by using a bleaching cleaning composition containing predetermined amounts of components (a), (b), (c), and (d) and water. The sustained mold removal rate after storage at 50°C for 20 days was 52% (Example 7) to 81% (Example 6), demonstrating a significantly superior effect. There was no significant decrease in viscosity, and evaluation of dripping properties using tube containers confirmed that all were gel-like liquids.In addition, more than 48% of the sodium hypochlorite in component (a) remained after storage at 50°C for 20 days.

[0082] As described above, in Comparative Examples 1 and 2, the viscosity immediately after production was less than 5 mPa·s. In Comparative Example 3, in which the alkaline agent (d) was not added and the pH of a 10% by mass aqueous solution immediately after production was 10, the mold removal rate and viscosity immediately after production were good values, but after 20 days of storage at 50°C, no component (a) remained, and the mold removal ability was 0%. The same tendency as in Comparative Example 3 was observed in Comparative Example 4, in which components (b) and (c) were not added and a polymeric thickener was added instead. Furthermore, in Comparative Examples 3 and 4, the viscosity dramatically decreased after storage, and in an evaluation of dripping properties using a tube container, the liquid dripped when the tube opening was tilted directly downward, indicating that the liquid was a low-viscosity liquid.

[0083] Table 2 shows the pH and viscosity immediately after production of the compositions produced according to the above Production Examples. [Table 2]

[0084] Table 2 shows the pH and viscosity immediately after production of the compositions produced according to the above Production Examples. Visual inspection of each composition using a tube container confirmed that all were gel-like liquids. These compositions also achieved high mold removal rates, stable viscosity, component (a) residual rates, and sustained mold removal rates. [Explanation of symbols]

[0085] 1 Discharge container, 2 Discharge outlet, 3 Sealing lid, 4 Length from the bottom of the discharge container to the tip of the discharge outlet, 5 Maximum width of the discharge container

Claims

1. (a) component: 0.1% by mass or more and 10% by mass or less of an alkali metal hypochlorite; Component (b): 0.1% by mass or more and 10% by mass or less of the general formula (1) 【Chemical 1】 [R in the formula １ represents a linear or branched alkyl group having 8 to 22 carbon atoms. ２ represents a linear or branched alkyl group having 1 to 12 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms. ３ and R ４ X may be the same or different and represent a linear or branched alkyl group having 1 to 4 carbon atoms. － indicates the counter anion.] one or more quaternary ammonium salt surfactants selected from quaternary ammonium salts represented by the formula: Component (c): aromatic sulfonic acid or a salt thereof, (d) component: alkaline agent, and water, wherein the viscosity at 25°C is 1,000 mPa·s or more and 100,000 mPa·s or less, and the pH of a 10 mass% aqueous solution at 25°C is 11 or more and 14 or less.

2. The bleaching detergent composition according to claim 1, wherein the quaternary ammonium salt surfactant of general formula (1) is one or more quaternary ammonium salt surfactants selected from the group consisting of quaternary ammonium salt surfactants of general formulas (1a) to (1c): 【Chemistry 2】 [R in the formula １ａ represents a linear or branched alkyl group having 14 to 22 carbon atoms. ２ａ , R ３ａ and R ４ａ X may be the same or different and represent a linear or branched alkyl group having 1 to 4 carbon atoms. ａ － indicates the counter anion.] 【Chemistry 3】 [R in the formula １ｂ and R ２ｂ R may be the same or different and represent a linear or branched alkyl group having 8 to 12 carbon atoms. ３ｂ and R ４ｂ X may be the same or different and represent a linear or branched alkyl group having 1 to 4 carbon atoms. ｂ － indicates the counter anion.] 【Chemistry 4】 [R in the formula １ｃ represents a linear or branched alkyl group having 8 to 18 carbon atoms. ２ｃ represents an aralkyl group having 7 to 12 carbon atoms. ３ｃ and R ４ｃ X may be the same or different and represent a linear or branched alkyl group having 1 to 4 carbon atoms. ｃ － indicates the counter anion.]

3. 3. The bleaching detergent composition according to claim 2, wherein component (b) is one or more quaternary ammonium salt surfactants selected from quaternary ammonium salt surfactants represented by general formula (1a):

4. (b) component is R １ａ The bleach detergent composition according to claim 2, wherein the surfactant is one or two quaternary ammonium salt surfactants selected from quaternary ammonium salt surfactants of general formula (1a), wherein

5. (b) component is R １ａ 3. The bleach detergent composition according to claim 2, wherein a quaternary ammonium salt surfactant of general formula (1a) is used in combination with the surfactant, wherein R is a linear or branched alkyl group having 16 or 18 carbon atoms.

6. 6. The bleaching detergent composition according to claim 1, wherein component (c) is a benzene derivative sulfonic acid or a salt thereof.

7. The benzene derivative sulfonic acid or its salt is represented by the general formula (2): 【Chemistry 5】 [In the formula, R ５ represents an alkyl or alkenyl group having 1 to 3 carbon atoms; n is an integer of 0 to 4, and when n is 2 or more, R ５ may be the same or different. M represents a hydrogen atom or a counter cation.

7. The bleaching detergent composition according to claim 6, wherein the benzenesulfonic acid or salt thereof is

8. 2. The bleaching detergent composition according to claim 1, wherein the molar ratio (c) / (b) of the content of the component (c) to the content of the component (b) is 0.35 or more and 5 or less.

9. The bleaching detergent composition according to claim 1, wherein the content of component (d) in the bleaching detergent composition is 0.5% by mass or more and 5.0% by mass or less.

10. 2. The bleaching detergent composition according to claim 1, which has a viscosity at 25°C of 3,000 mPa·s or more and 100,000 mPa·s or less.

11. The bleaching detergent composition according to claim 1, which is used as a mold remover.

12. A method for bleaching and cleaning mold stains, comprising contacting the bleaching detergent composition according to claim 1 with mold that has grown on a hydrophobic resin part.

13. A method for bleaching and cleaning mold stains, comprising contacting the bleaching detergent composition according to claim 1 with mold and leaving it for 5 minutes or more.

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