Bleaching composition for hard surfaces, bleaching composition product for hard surfaces, and method for cleaning hard surfaces

Abstract

To enhance the storage stability of a bleaching composition for hard surfaces.SOLUTION: A bleaching composition for hard surfaces comprises: component (A) a hypochlorite; component (B) an acrylic polymer; component (C) an alkali agent; component (D) at least one selected from an aromatic sulfonic acid compound having at least one selected from a methyl group and a methoxy group on a benzene ring and a salt thereof; and component (E) a dye, wherein the mass ratio of the content of the (E) component to the content of the (D) component, represented as (E) / (D), is 0.001 or more and less than 0.025.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a bleaching agent composition for hard surfaces, a product of the bleaching agent composition for hard surfaces, and a method for cleaning hard surfaces.

Background Art

[0002] For hard surfaces such as floors, walls, ceilings, joints, etc. in bathrooms, kitchens, toilets, etc., a bleaching agent composition for hard surfaces is used for the purpose of removing generated mold. The bleaching agent composition for hard surfaces contains a hypochlorite such as sodium hypochlorite as a bleaching component.

[0003] The bleaching agent composition for hard surfaces is applied to the mold generation area, left for an arbitrary time, and then washed away. Therefore, the bleaching agent composition on the hard surface is required to have a function (retention property) of staying in the applied area when applied to the object to be cleaned. However, the bleaching agent composition for hard surfaces containing a hypochlorite as a bleaching component has a problem that the viscosity decreases over time and the retention property decreases.

[0004] In response to such problems, Patent Document 1 discloses a bleaching agent composition containing an alkali metal hypochlorite, an organic thickener, an alkali agent, a specific aromatic sulfonic acid compound or its alkali metal salt, a specific pigment, and a specific glycol compound in specific amounts. According to the invention of Patent Document 1, improvement in storage stability is achieved.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the prior art, the storage stability in terms of physical properties was not satisfactory. For this reason, viscosity reduction occurs over time, retention decreases over time, or the drawability (the property of forming a thread when poured out from a container) increases over time, making handling complicated. The present invention has been made in view of the above circumstances, and an object thereof is to provide a bleaching agent composition for hard surfaces having excellent storage stability.

Means for Solving the Problems

[0007] The present invention has the following aspects. <1> (A) component: hypochlorite, and (B) component: acrylic polymer, and (C) component: alkali agent, and (D) component: at least one selected from aromatic sulfonic acid compounds having at least one selected from a methyl group and a methoxy group on a benzene ring and salts thereof, and (E) component: dye, and containing, A bleaching agent composition for hard surfaces, represented by the (E) component / the (D) component, wherein the mass ratio of the content of the (E) component to the content of the (D) component is 0.001 or more and less than 0.025. <2> The bleaching agent composition for hard surfaces according to <1>, which is in a gel form.

[0008] <3> Having the bleaching agent composition for hard surfaces according to <1> or <2> and a container, The container has a main body that houses the bleaching agent composition for hard surfaces inside and a nozzle that protrudes from the main body, and is a bleaching agent composition product for hard surfaces.

[0009] <4> Applying the bleaching agent composition for hard surfaces according to <1> or <2> to a cleaning target, and then rinsing off the applied bleaching agent composition for hard surfaces, is a method for cleaning hard surfaces.

Effects of the Invention

[0010] According to the bleaching agent composition for hard surfaces of the present invention, it has excellent storage stability.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0012] (Bleaching agent composition for hard surfaces) The bleaching agent composition for hard surfaces of the present invention (hereinafter sometimes simply referred to as "bleaching agent composition") contains components (A) to (E). In this specification, the numerical range represented by "~" means a numerical range having the numerical values before and after ~ as the lower limit value and the upper limit value.

[0013] The bleaching agent composition is in a dosage form having fluidity, and a gel form is preferred.

[0014] The viscosity of the bleaching agent composition is preferably 2000 to 30000 mPa·s, more preferably 2500 to 20000 mPa·s, still more preferably 3000 to 10000 mPa·s, and particularly preferably 3500 to 7000 mPa·s. When the viscosity is not less than the above lower limit value, the retention property can be further enhanced. When the viscosity is not more than the above upper limit value, the bleaching agent composition can be more easily poured out from the container, and handling is easier. The viscosity can be adjusted by the type and amount of component (B). The viscosity of the bleaching agent composition is a value measured at 25°C for the measurement object, using a B-type viscometer, with rotor number No. 4 and rotor rotation speed of 60 rpm, 60 seconds after the start of rotor rotation.

[0015] The pH of the bleaching agent composition is preferably 10 or higher, more preferably 11 or higher, and even more preferably 12 or higher. When the pH is at or above the above lower limit value, the viscosity can be further increased. The upper limit value of the pH is substantially 14. The pH can be adjusted by the types and amounts of the component (C) and the pH adjuster.

[0016] <(Component A)> (Component A) is a hypochlorite. By containing (Component A), the bleaching agent composition exhibits bleaching power against stains and reduces or suppresses the growth of microorganisms such as mold.

[0017] As (Component A), for example, an alkali metal hypochlorite or an alkaline earth metal hypochlorite is preferable. Examples of the alkali metal hypochlorite include lithium hypochlorite, potassium hypochlorite, and sodium hypochlorite. Examples of the alkaline earth metal hypochlorite include calcium hypochlorite and magnesium hypochlorite. Among them, as (Component A), an alkali metal hypochlorite is preferable, potassium hypochlorite and sodium hypochlorite are more preferable, and sodium hypochlorite is even more preferable. The above-mentioned (Component A) may be used alone or in combination of two or more.

[0018] The content of (Component A) is preferably 0.5 to 5% by mass, more preferably 1 to 4% by mass, and even more preferably 1.5 to 3% by mass based on the total mass of the bleaching agent composition. When the content of (Component A) is at or above the above lower limit value, the bleaching power can be further increased. When the content of (Component A) is at or below the above upper limit value, the storage stability of the viscosity can be further increased.

[0019] <(Component B)> (Component B) is an acrylic polymer. By containing (Component B), the bleaching agent composition increases the viscosity and enhances the retention.

[0020] (Component B) is an acrylic acid polymer. Examples of the acrylic polymer include polymers having one or more repeating units selected from a repeating unit (repeating unit (b1)) derived from a monomer represented by the following formula (b1) and a repeating unit (repeating unit (b2)) derived from a monomer represented by the following formula (b2).

[0021] [Chemical formula]

[0022] In formula (b1), R 1 is a hydrogen atom or a methyl group, and R 2 is a hydrogen atom. In formula (b2), R 3 is a hydrogen atom or a methyl group, and R 4 is an alkyl group having 1 to 40 carbon atoms. Examples of the monomer represented by formula (b1) include acrylic acid and methacrylic acid. These monomers represented by formula (b1) may be used alone or in combination of two or more. Examples of the monomer represented by formula (b2) include acrylic esters such as methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, octyl acrylate, decyl acrylate, dodecyl acrylate, and icosyl acrylate; and methacrylic esters such as methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, decyl methacrylate, dodecyl methacrylate, and icosyl methacrylate. These monomers represented by formula (b2) may be used alone or in combination of two or more.

[0023] As component (B), both cross-linked and non-cross-linked ones can be used, but cross-linked ones are more preferable from the viewpoint of stability. Component (B) may have repeating units (other repeating units) other than repeating unit (b1) and repeating unit (b2). Examples of other repeating units include repeating units derived from other monomers. Other monomers are not particularly limited as long as they are copolymerizable with the monomer represented by the formula (b1) and the monomer represented by the formula (b2), and one or more thereof can be used.

[0024] The molecular weight of the component (B) is preferably, for example, from 10 million to 50 billion, more preferably from 100 million to 10 billion. When the molecular weight is at least the above lower limit, the viscosity of the bleaching composition can be further increased. When the molecular weight is at most the above upper limit, the fluidity of the bleaching composition can be increased, making it easier to handle.

[0025] Commercially available products of the component (B) include NOVETHIX (registered trademark) series and CARBOPOL (registered trademark) series. Examples of the component (B) include NOVETHIX HC200, CARBOPOL EZ-2, CARBOPOL EZ-3, CARBOPOL EZ-4, CARBOPOL EZ-5, CARBOPOL 676, CARBOPOL 674, CARBOPOL 690 (manufactured by Lubrizol Corporation). Among them, from the viewpoint of retention, CARBOPOL EZ-5 is preferred. The above-mentioned component (B) may be used alone or in combination of two or more.

[0026] The content of the component (B) is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, and still more preferably 1 to 3% by mass based on the total mass of the bleaching composition. When the content of the component (B) is at least the above lower limit, the retention can be further increased. When the content of the component (B) is at most the above upper limit, the storage stability of the viscosity can be further increased.

[0027] The mass ratio of the content of the component (B) to the content of the component (A), that is, the mass ratio (B / A ratio) represented by (B) component / (A) component is preferably 0.1 to 10, more preferably 0.2 to 5. When the B / A ratio is at least the above lower limit, the detergency can be further increased. When the B / A ratio is at most the above upper limit, the retention can be further increased.

[0028] <(C) component> Component (C) is an alkaline agent. By including component (C), the storage stability of the bleaching agent composition can be enhanced.

[0029] As component (C), either an inorganic alkaline agent or an organic alkaline agent may be used. Examples of the inorganic alkaline agent include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and the like. Examples of the organic alkaline agent include alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine. Among them, as component (C), an inorganic alkaline agent is preferred, and sodium hydroxide and potassium hydroxide are more preferred. These components (C) may be used alone or in combination of two or more.

[0030] The content of component (C) is preferably 0.1 to 5% by mass, more preferably 0.5 to 4% by mass, and even more preferably 1 to 3% by mass based on the total mass of the bleaching agent composition. When the content of component (C) is at least the above lower limit value, the bleaching power can be further enhanced. When the content of component (C) is at most the above upper limit value, the storage stability of the viscosity can be further enhanced.

[0031] <(D) component> Component (D) is at least one selected from aromatic sulfonic acid compounds having at least one selected from a methyl group and a methoxy group in the benzene ring and salts thereof. By containing component (D), the storage stability of the viscosity or appearance of the bleaching agent composition can be enhanced.

[0032] Examples of the salt of component (D) include alkali metal salts and the like. Examples of component (D) include toluenesulfonic acid or its sodium salt, xylenesulfonic acid or its sodium salt, methoxybenzenesulfonic acid or its sodium salt. Among them, from the viewpoint of the storage stability of the drawability, at least one selected from toluenesulfonic acid and its salts is preferred. Examples of toluenesulfonic acid include p-toluenesulfonic acid, o-toluenesulfonic acid, and m-toluenesulfonic acid.

[0033] (D) The content of the component is preferably 0.1 to 5% by mass, more preferably 0.4 to 3% by mass, and even more preferably 1 to 2.5% by mass with respect to the total mass of the bleaching agent composition. When the content of the (D) component is at least the above lower limit value, the storage stability of the viscosity or appearance can be further enhanced. When the content of the (D) component is at most the above upper limit value, the storage stability of the viscosity can be further enhanced.

[0034] The mass ratio of the (D) component to the content of the (A) component, that is, the mass ratio (D / A ratio) represented by (D) component / (A) component is preferably 0.02 to 10, more preferably 0.05 to 5, and even more preferably 0.1 to 3. When the D / A ratio is at least the above lower limit value, the retention property can be further enhanced. When the D / A ratio is at most the above upper limit value, the detergency can be further enhanced.

[0035] <(E) component> (E) The component is a dye. By containing the (E) component, the storage stability of the viscosity or appearance of the bleaching agent composition can be enhanced.

[0036] The dye which is the (E) component is a colorant dissolved in a solvent. The (E) component of the present invention is, for example, a water-soluble dye. Examples of the (E) component include direct dyes, acid dyes, basic dyes, mordant dyes, acid mordant dyes, and the like. Examples of the direct dye include Direct Yellow 12, Direct Yellow 28, Direct Yellow 96, Direct Orange 39, and examples of the acid dye include Acid Yellow 38, Acid Yellow 104, Acid Yellow 219, Acid Orange 67, Acid Orange 87, Acid Green 28, and the like. Examples of the basic dye include Basic Blue 9, and the like. Examples of the mordant dye include Mordant Red 11, and the like. Among them, as the component (E), direct dyes and acid dyes are preferred, Direct Yellow 12, Acid Yellow 38, Acid Yellow 104, and Acid Yellow 219 are more preferred, and Direct Yellow 12 is even more preferred. These components (E) may be used alone or in combination of two or more.

[0037] The content of the component (E) is preferably 0.0005 to 0.1% by mass, more preferably 0.001 to 0.05% by mass, and even more preferably 0.002 to 0.02% by mass, based on the total mass of the bleaching agent composition. When the content of the component (E) is at least the above lower limit, the storage stability of viscosity, appearance or drawability can be further enhanced. When the content of the component (E) is at most the above upper limit, the storage stability of viscosity or drawability can be further enhanced.

[0038] The mass ratio of the content of the component (E) to the content of the component (D), that is, the mass ratio (E / D ratio) represented by (E) component / (D) component, is preferably 0.001 or more and less than 0.025, more preferably 0.001 to 0.02, even more preferably 0.002 to 0.015, and particularly preferably 0.003 to 0.01. When the E / D ratio is at least the above lower limit, the storage stability of viscosity can be further enhanced. When the E / D ratio is at most the above upper limit, the storage stability of viscosity can be further enhanced.

[0039] <Optional component> The bleaching agent composition may contain components other than the components (A) to (E) (optional components). Examples of the optional components include water, surfactants, thickeners other than the component (B) (optional thickeners), pH adjusters other than the component (C) (acidic agents), organic solvents other than the component (D) (optional organic solvents), sequestering agents, antifoaming agents, radical trap agents, bactericides, antibacterial agents, preservatives, and the like. Note that the total of the components (A) to (E) and the optional components is 100% by mass.

[0040] The content of water is, for example, 50 to 97% by mass based on the total mass of the bleaching agent composition.

[0041] As surfactants, for example, anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, semi-polar surfactants, etc. are appropriately selected according to the purpose. Examples of surfactants include myristyldimethylamine oxide (product name "CadenaX DM14D-N" manufactured by Lion Specialty Chemicals Co., Ltd.), potassium coconut fatty acid (manufactured by Lion Specialty Chemicals Co., Ltd., product name "Potassium Coconut Fatty Acid 30% Aqueous Solution"), and the like. The content of the surfactant is, for example, 1 to 20% by mass based on the total mass of the bleaching agent composition.

[0042] Examples of optional thickeners include xanthan gum (product name "Kelzan T" manufactured by Sankyo Co., Ltd.), diutan gum (product name "KELCO-VIS DG" manufactured by Sankyo Co., Ltd.), and cellulose nanofibers (product name "C-100" manufactured by Mori Machinery Co., Ltd.). The total content of the thickeners (including component (B)) is, for example, 0.1 to 10% by mass based on the total mass of the bleaching agent composition. The content of component (B) relative to the total content of the thickeners is preferably 50% by mass or more, more preferably 80% by mass or more, and may be 100% by mass. The above-mentioned optional components may be used alone or in combination of two or more.

[0043] Examples of acidifying agents include mineral acids such as hydrochloric acid and sulfuric acid, and organic acids such as citric acid and lactic acid.

[0044] Examples of optional organic solvents include monohydric alcohols having 1 to 4 carbon atoms, polyethylene glycol, polypropylene glycol, and the like. The total content of the organic solvents (including component (D)) is, for example, 0.1 to 5% by mass based on the total mass of the bleaching agent composition. The content of component (D) relative to the total content of the organic solvents is preferably 50% by mass or more, more preferably 80% by mass or more, and may be 100% by mass. The above-mentioned optional components may be used alone or in combination of two or more.

[0045] (Product of a bleaching agent composition for hard surfaces) The product of a bleaching agent composition for hard surfaces (hereinafter sometimes simply referred to as "bleaching agent composition product") has the bleaching agent composition of the present invention and a container.

[0046] The container may be any container that can contain the bleaching agent composition and pour out the bleaching agent composition. Examples of the container include a container having a main body that houses the bleaching agent composition inside and a nozzle that pours out the bleaching agent composition inside the main body.

[0047] An example of the container of the bleaching agent composition product of the present invention will be described with reference to the drawings. The container 1 in FIG. 1 has a main body 10 and a nozzle cap 20 located at the tip of the main body 10. The main body 10 is a so-called tube container, and the longitudinal direction is from the bottom to the nozzle cap 20. The bottom of the main body 10 is closed by a seal portion 12. The end of the main body 10 opposite to the seal portion 12 is open. The nozzle cap 20 has a cap portion 24 of the main body 10 and a nozzle portion 22 protruding from the cap portion 24. In the present embodiment, the nozzle portion 22 tapers toward the tip. The cap portion 24 is fitted to the opposite end of the main body 10. In this way, one end of the main body 10 is blocked by the seal portion 12, and the other end is blocked by the nozzle cap 20. A flow path is formed inside the nozzle cap 20. At the tip of the nozzle portion 22, a pouring outlet that is the end of the flow path is formed.

[0048] The size of the main body 10 is not particularly limited, but from the viewpoint of handling, for example, it has a capacity of 100 to 300 mL. The length of the main body 10 (the distance from the bottom to the other end) is 50 to 200 mm from the viewpoint of handling. The length of the nozzle portion 22 is not particularly limited, but from the viewpoint of handling, for example, it is 20 to 70 mm. The length of the nozzle portion 22 is the distance from the boundary between the nozzle portion 22 and the cap portion 24 to the tip of the nozzle portion 22. The size (opening diameter) of the pouring outlet of the nozzle portion 22 is preferably, for example, 1 to 5 mm. When the opening diameter is equal to or greater than the above lower limit value, the content (i.e., the bleaching agent composition) can be poured out with a smaller force. When the opening diameter is equal to or less than the above upper limit value, the content can be more appropriately applied to narrow areas such as joints and corners of walls.

[0049] As the material of the main body 10, a flexible material is preferable. Examples of the material of the main body 10 include resin and metal. Examples of the resin include polypropylene, polyethylene, polyethylene terephthalate, etc. An example of the metal is aluminum. The thickness of the wall portion constituting the main body 10 is appropriately determined according to the material and the like.

[0050] The material of the nozzle cap 20 is the same as that of the main body 10. The material of the nozzle cap 20 may be the same as or different from that of the main body 10.

[0051] Another example of the container of the bleaching agent composition product of the present invention will be described with reference to the drawings. The container 100 in FIG. 2 has a main body 110 and a nozzle cap 20. The main body 110 is a so-called bottle-shaped container, and has a bottom portion 112 that is substantially circular in plan view, a substantially cylindrical body portion 114 that rises from the periphery of the bottom portion 112, a shoulder portion 116 that gradually narrows upward from the upper end of the body portion 114, and a cylindrical neck portion 118 that protrudes from the upper end of the shoulder portion 116. The thickness R1 of the main body 110 is preferably, for example, 10 to 70 mm, and more preferably 15 to 50 mm. The thickness R1 is the maximum diameter in plan view. When the plan view shape of the main body 110 is an ellipse, the thickness R1 is the minor axis. When the plan view shape of the main body 110 is a quadrilateral, the thickness R1 is the length of the short side. When the plan view shape of the main body 110 is a polygon other than a quadrilateral, the thickness R1 is the length of the diagonal. The distance (height) T1 from the bottom surface to the upper end of the main body 110 is preferably, for example, 30 to 250 mm. If the height T1 is within the above range, the container 100 is easy to operate when discharging the content. The thickness of the main body 110 is preferably 0.2 to 2 mm, and more preferably 0.3 to 1.7 mm.

[0052] In the above-described embodiments, the main body is a tube container or a bottle-shaped container, but the present invention is not limited thereto. The main body may be a flat bag or a standing pouch bag.

[0053] Further, the container may have the same form as a syringe. When the container is in the form of a syringe, the main body does not have to be flexible.

[0054] (Manufacturing method) The bleaching agent composition of the present invention is manufactured by a conventionally known manufacturing method. For example, the components (A) to (E) and optional components are added to a part of water, stirred, the pH is adjusted as necessary, and then the remaining part of the water is added to manufacture the bleaching agent composition.

[0055] The obtained bleaching agent composition is filled into the main body 10, and the nozzle cap 20 is attached to the main body 10 to obtain a bleaching agent composition product.

[0056] (Usage method) An example of the usage method (cleaning method) of the bleaching agent composition will be described. The tip of the nozzle part of the bleaching agent composition product is brought into contact with the object to be cleaned. While moving the position of the pouring outlet with respect to the object to be cleaned, the body part of the container is pressed with fingers. When the body part is pressed, the content (bleaching agent composition) flows into the flow path in the nozzle cap from the main body, flows through the flow path, and is discharged from the pouring outlet. In this way, the bleaching agent composition is applied to an arbitrary area (coating step). Examples of the object to be cleaned include hard surfaces such as the floor, walls, ceiling, joints, etc. in the bathroom, kitchen, toilet, etc. When the bleaching agent composition is applied to the surface of the object to be cleaned, the bleaching agent composition of the present invention is excellent in the storage stability of viscosity, so it does not drip from the surface of the object to be cleaned or spread excessively wet. In addition, since the bleaching agent composition of the present invention is excellent in storage stability, excessive stringing does not occur. Therefore, it is possible to prevent the bleaching agent composition from adhering to areas other than the surface of the object to be cleaned. The application amount of the bleaching agent composition is, for example, 10 to 500 mg / cm 2It is set as such. When the coating amount is equal to or greater than the above lower limit value, cleaning can be performed better. When the coating amount is equal to or less than the above upper limit value, it is possible to more surely prevent the bleaching agent composition from adhering to other than the object to be cleaned.

[0057] In the coating step, the bleaching agent composition is applied to the object to be cleaned and left for an arbitrary time (standing step). Thereby, the mold adhering to the object to be cleaned is reduced, and the growth of the mold is suppressed. In addition, the colored area due to the mold is decolorized and cleaned. The standing time (standing time) is, for example, set to 1 to 30 minutes. When the standing time is equal to or greater than the above lower limit value, cleaning can be performed better. When the standing time is equal to or less than the above upper limit value, deterioration of the member to be cleaned can be more prevented.

[0058] After the standing time has elapsed, the bleaching agent composition applied to the object to be cleaned is rinsed off (rinsing step). By passing through the rinsing step, it is possible to prevent the residue of the bleaching agent composition on the surface of the object to be cleaned.

[0059] In the above-described embodiment, the bleaching agent composition is applied to the object to be cleaned while being poured out from a container with a nozzle, but the present invention is not limited to this. For example, the bleaching agent composition may be applied to the object to be cleaned with a brush, a dropper, or the like.

Example

[0060] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by the following description.

[0061] (Raw materials used) <(Component (A): Hypochlorite)> ·A-1: Sodium hypochlorite (product name "Sun Rackoo P9" manufactured by Honmachi Chemical Industry Co., Ltd.).

[0062] <(Component (B): Acrylic thickener)> ·B-1: Acrylic polymer (manufactured by Lubrizol Corporation, product name "CARBOPOL EZ-5"). · B-2: Non-crosslinked acrylic polymer (manufactured by Lubrizol Corporation, product name "NOVETHIX HC200").

[0063] <(Component (B’): Comparative product of component (B))> · B’-1: Carboxymethyl cellulose (manufactured by Daicel Finechem Ltd., product name "1350"). In the table, it is described as "CMC(1350)".

[0064] <(Component (C): Alkali agent)> · C-1: Sodium hydroxide (manufactured by Goyang Shokai Co., Ltd., product name "Liquid Caustic Soda", 48% sodium hydroxide solution). <(Component (D): Aromatic sulfonic acid compound)> · D-1: Sodium p-toluenesulfonate (manufactured by Tokyo Chemical Industry Co., Ltd.). · D-2: Sodium methoxybenzenesulfonate (manufactured by Teika Co., Ltd., product name "Teikatox N6030"). · D-3: Sodium xylenesulfonate (manufactured by Teika Co., Ltd., product name "Teikatox N1140").

[0065] <(Component (D’): Comparative product of component (D))> · D’-1: Sodium cumenesulfonate (manufactured by Teika Co., Ltd., product name "Teikatox N5040").

[0066] <(Component (E): Dye)> · E-1: Direct Yellow 12 (manufactured by Nippon Kayaku Co., Ltd., product name "Kayafect Yellow S"). · E-2: Acid Yellow 38 (manufactured by Sigma-Aldrich). · E-3: Acid Yellow 219 (manufactured by Ciba Specialty Chemicals Inc., product name "Tectilon Yellow 4R 200%").

[0067] <(Component (E’): Pigment)> · E’-1: Pigment Green 7 (manufactured by Tokyo Chemical Industry Co., Ltd., phthalocyanine-based pigment). <Optional component> · Water: Purified water.

[0068] (Evaluation method) <Bleaching power> The bleaching agent compositions of each example were stored at 50 °C for 2 weeks. After storage, the bleaching agent compositions were applied with a dropper to the black mold on the rubber packing. This was left for 30 minutes, then rinsed with water and observed visually. The observation results were classified and evaluated according to the following evaluation criteria.

[0069] ≪Evaluation criteria≫ ○: All the mold has been bleached. ×: Almost none of the mold has been bleached.

[0070] <Retention> The bleaching agent compositions of each example were stored at 50 °C for 2 weeks. 1 g of the bleaching agent composition after storage was applied horizontally with a length of 3 cm to an FRP plate for evaluation (10 cm × 10 cm × 10 cm, manufactured by TOTO, Poly Bath T-10R) with a dropper. The FRP plate coated with the bleaching agent composition was set vertically, and the state after 30 minutes was observed visually. The observation results were classified and evaluated according to the following evaluation criteria.

[0071] ≪Evaluation criteria≫ 5 points: It has not dripped at all. 4 points: It has dripped slightly. 3 points: It has dripped a little. 2 points: It has dripped considerably. 1 point: It has almost dripped.

[0072] <Viscosity> The viscosity of the bleaching agent composition of each example was measured and designated as the initial viscosity (Va). After the bleaching agent composition of each example was stored at 50 °C for 2 weeks, the viscosity was measured and designated as the viscosity after storage (Vb). From the obtained Va and Vb, the viscosity retention rate was calculated by the following formula (s) (rounding off the decimal places). The viscosity retention rate was classified and evaluated according to the following evaluation criteria.

[0073] Viscosity retention rate (%) = Vb / Va × 100 ··· (s)

[0074] <<Evaluation Criteria>> 5 points: The viscosity retention rate is 70% or more. 4 points: The viscosity retention rate is 60 - 69%. 3 points: The viscosity retention rate is 40 - 59%. 2 points: The viscosity retention rate is 20 - 39%. 1 point: The viscosity retention rate is 19% or less.

[0075] <Color Tone> The bleaching agent compositions of each example were stored at 50°C for 2 weeks. The change (degree of decolorization) from the color tone before storage was visually observed. The observation results were classified according to the following evaluation criteria and evaluated.

[0076] <<Evaluation Criteria>> 5 points: Not decolorized at all (equivalent to the color tone and concentration before storage). 4 points: Slightly decolorized (the color tone before storage can be easily recognized, but the pigment concentration is slightly different). 3 points: Slightly decolorized (the color tone before storage can be easily recognized, but the pigment concentration is quite different). 2 points: Considerably decolorized (it is slightly difficult to recognize the color tone before storage). 1 point: Highly decolorized (the color tone before storage cannot be recognized).

[0077] <Spinnability> The bleaching agent compositions of each example were stored at 50°C for 2 weeks. The spinnability when 1 g of the bleaching agent composition after storage was applied horizontally in a length of 3 cm to an FRP plate for evaluation (10 cm × 10 cm × 10 cm, manufactured by TOTO, Poly Bath T - 10R) with a dropper was visually observed. The observation results were classified according to the following evaluation criteria and evaluated.

[0078] <<Evaluation Criteria>> 5 points: No spinnability at all. 4 points: Slight spinnability. 3 points: Slight spinnability. 2 points: Considerable spinnability. 1 point: High spinnability.

[0079] (Examples 1 - 12, Comparative Examples 1 - 7) According to the compositions shown in Tables 1 to 2, the components (A) to (E) and optional components were added to water and mixed to prepare the bleaching agent compositions of each example. The compounding amounts in the table are values converted to pure components. In the table, the description "-" indicates that it is not compounded. The "balance" of the compounding amount of water is the amount required for the total amount to be 100% by mass. The "appropriate amount" of the compounding amount of component (C) is the amount required for the pH described in the table. Regarding the bleaching agent compositions of each example, the bleaching power, retention, storage stability, visibility, and drawability after storage were evaluated, and the results are shown in the table.

[0080]

Table 1

[0081]

Table 2

[0082] As shown in Tables 1 to 2, in Examples 1 to 12, the bleaching power was "○", and the retention, viscosity, color tone, and drawability after storage were 3 points or more. In Comparative Example 1 lacking components (D) and (E), the retention and viscosity were 2 points, and the drawability was 1 point. In Comparative Example 2 using carboxymethyl cellulose instead of component (B), the bleaching power was "×", and the retention and viscosity were 1 point. In Comparative Example 3 lacking component (D), the retention and color tone were 2 points. In Comparative Example 4 lacking component (E), the retention was 2 points and the color tone was 1 point. In Comparative Example 5 with an E / D ratio of 0.03, the viscosity was 2 points. In Comparative Example 6 using component (D') instead of component (D), the bleaching power was ×, and the retention and viscosity were 1 point. In Comparative Example 7 using component (E') instead of component (E), the retention, viscosity, and drawability were 2 points. From the above results, it was confirmed that by applying the present invention, the storage stability can be improved.

Claims

1. Component (A): Hypochlorite, and Component (B): Acrylic polymer, and Component (C): Alkali agent, and Component (D): At least one selected from aromatic sulfonic acid compounds having at least one selected from a methyl group and a methoxy group in a benzene ring and salts thereof, and Component (E): Dye, and containing, A bleaching composition for hard surfaces, represented by the ratio of the component (E) to the component (D), wherein the mass ratio of the content of the component (E) to the content of the component (D) is 0.001 or more and less than 0.

025.

2. The bleaching composition for hard surfaces according to claim 1, which is in a gel form.

3. A bleaching composition product for hard surfaces, comprising the bleaching composition for hard surfaces according to claim 1 or 2 and a container, wherein the container has a main body for accommodating the bleaching composition for hard surfaces therein and a nozzle protruding from the main body.

4. A method for cleaning a hard surface, comprising applying the bleaching composition for hard surfaces according to claim 1 or 2 to a cleaning target, and then rinsing the applied bleaching composition for hard surfaces.

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