Liquid detergent composition and odor reduction method of liquid detergent composition

Abstract

To provide a liquid detergent composition which, when an article with a trigger-type sprayer, etc. for spraying the composition is used, has a reduced odor, the odor being derived from a composition containing alkali metal hypochlorite.SOLUTION: A liquid detergent composition is prepared which includes: water; and a compound selected from the following components (a) to (d): a component (a): alkali metal hypochlorite in a content of 0.1 mass% or more and 1.2 mass% or less; a component (b): amine oxide in a content of 0.05 mass% or more and 1 mass% or less; a component (c): a 8-12C fatty acid salt in a content of 0.1 mass% or more and 2 mass% or less; and a component (d): alkali metal hydroxide and an alkali metal salt of weak acid in a content of 0.1 mass% or more and 1 mass% or less, the weak acid having a pKa at 25°C of 10 or more. The liquid detergent composition has a mass ratio (b) / (c) of the content of the component (b) to the content of the component (c) of 0.05 or more and 1 or less and has a pH at 25°C of 12.0 or more and 14.0 or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a liquid detergent composition containing an alkali metal hypochlorite. More specifically, the present invention relates to a method for reducing the odor of an aqueous solution containing an alkali metal hypochlorite, which is used on an article by spraying with a trigger sprayer or the like. [Background technology]

[0002] Dirt that accumulates on hard surfaces in areas around the home where water is frequently used, such as stainless steel, ceramics, tiles and their joints, plastic products, and drainage pipes in kitchens, bathrooms, and toilets, is thought to be caused by soap scum, sebum, and microorganisms such as bacteria and mold. These complex stains are difficult to completely remove using surfactants alone, and can lead to discoloration and the development of unpleasant odors over time. For this reason, bleaching cleaners based on sodium hypochlorite, which has bleaching, disinfecting, and deodorizing effects, have traditionally been used. The hard surfaces targeted by the bleaching detergent compositions described above are not limited to horizontal surfaces but also include vertical and inclined surfaces. Therefore, various foam spray-type products using trigger containers have been investigated as product forms that improve the adhesion and retention of bleaching ingredients. On the other hand, recent surveys into actual usage have confirmed that aqueous solutions containing alkali metal hypochlorite have a distinctive, strong odor, which is one of the factors that prevents them from being used by young people, mainly those with small children.

[0003] Patent Document 1 discloses a technology for reducing the chlorine odor that is particularly noticeable when the lid of a filled container is opened by adjusting the pH value of an aqueous solution containing sodium hypochlorite to 11.6 or higher. Patent Document 2 discloses a liquid detergent that uses two specific types of amine oxides in combination, which has good foaming properties and adheres and stays on dirty surfaces even when sprayed with a trigger-type sprayer or the like on vertical or inclined dirty surfaces such as walls. Patent Document 3 discloses a technology in which, when an alkali metal hypochlorite and a specific type of surfactant are used and further combined in a specific ratio, the alkali metal hypochlorite has good storage stability, is excellent in cleaning properties against blood stains, and also has excellent foaming properties when sprayed. Patent Document 4 discloses a chlorine bleach composition that is excellent in terms of ease of use, visibility, adhesion and retention on the target surface, and storage stability at low temperatures, obtained by adjusting the ratio of two specific types of amine oxides and using them in combination with a fatty acid salt, and thereby ejecting dense foam when sprayed with a sprayer such as a trigger. Patent Document 5 discloses a spray-contained cleaner in a trigger-type sprayer container, which is filled with a liquid detergent composition containing (a) 0.1 to 10 mass % of a surfactant, (b) 0.05 to 3 mass % of polypropylene glycol disulfate or a salt thereof, and water, with the aim of improving adhesion and retention on wall surfaces and foaming properties. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-231842 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-281651 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-221043 [Patent Document 4] Japanese Patent Application Laid-Open No. 2007-177092 [Patent Document 5] Japanese Patent Application Laid-Open No. 2007-177093 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 describes a technology for reducing the chlorine odor felt when opening the lid of a container filled with an aqueous solution containing sodium hypochlorite. It was found that when sprayed with a spray that is easily detected by the nose, there is an issue with the effectiveness of reducing the odor around the target object.

[0006] As a result of extensive research, the inventors have discovered that in addition to controlling the content of component (a): alkali metal hypochlorite and the pH of the aqueous solution within the claimed ranges, in order to impart the effect of reducing the odor from the alkali metal hypochlorite when sprayed, which is easily detected by the nose, it is important to control the mass ratio (b) / (c) of the content of component (b): alkali metal hydroxide and alkali metal salt of a weak acid, where the weak acid is a compound selected from compounds with a pKa of 10 or more at 25°C, to the content of component (c): fatty acid having from 8 to 12 carbon atoms, to a specific ratio when spraying, thereby arriving at the present invention. This finding led to the present invention, which is particularly effective when the content of alkali metal hypochlorite in the liquid detergent composition is low. The present invention aims to solve the problems of the conventional technology and to provide a liquid detergent composition that reduces the odor caused by the liquid detergent composition containing an alkali metal hypochlorite when used on an item by spraying it with a trigger-type sprayer or the like. [Means for solving the problem]

[0007] The present invention provides (a) component: alkali metal hypochlorite in a content of 0.1% by mass or more and 1.2% by mass or less; (b) component: a compound represented by general formula (1) having a content of 0.05% by mass or more and 1% by mass or less [ka] [In the formula, R 1 represents an alkyl group having 6 to 16 carbon atoms. 2 and R 3 each independently represents an alkyl group having 1 to 4 carbon atoms. an amine oxide represented by (c) Component: fatty acid salt having a carbon number of 8 to 12 and a content of 0.1% by mass to 2% by mass (d) component: a compound selected from alkali metal hydroxides and alkali metal salts of weak acids, the content of which is 0.1% by mass or more and 1% by mass or less, wherein the weak acids have a pKa of 10 or more at 25°C; and The liquid detergent composition contains water, the mass ratio of the content of (b) to the content of (c), (b) / (c), is 0.05 or more and 1 or less, and the pH at 25°C is 12.0 or more and 14.0 or less. The present invention also relates to a method for reducing the odor of an aqueous solution containing an alkali metal hypochlorite in an article that is used by spraying with a trigger-type sprayer or the like.

[0008] The liquid detergent composition of the present invention contains one or more alkali metal hypochlorite salts as component (a). Examples of alkali metals include sodium and potassium. It is preferable to use sodium salts alone because of their easy availability. Sodium hypochlorite can be used in the form of an aqueous sodium hypochlorite solution. Due to production, an equimolar amount of sodium chloride may be present in the aqueous sodium hypochlorite solution. From the viewpoint of maintaining the performance of component (a) while more easily achieving the odor-reducing effect of component (a) by using components (b) and (c) in a specific ratio, as described below, it is preferable to initially use a low sodium chloride content relative to sodium hypochlorite. Specifically, the sodium chloride content relative to sodium hypochlorite is preferably 10 to 60 mol %, preferably 10 to 40 mol %, of sodium hypochlorite. Such sodium hypochlorite with reduced sodium chloride content is commercially available as low-calorie sodium hypochlorite.

[0009] The content of component (a) is 0.1% by mass or more, preferably 0.2% by mass or more, more preferably 0.4% by mass or more, from the viewpoint of a good cleaning effect, and 1.2% by mass or less, preferably 1.0% by mass or less, more preferably 0.9% by mass or less, and even more preferably 0.8% by mass or less, from the viewpoint of an odor-reducing effect. 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

[0051] and converting it into the formula weight of sodium hypochlorite (NaOCl).

[0010] The liquid detergent composition of the present invention contains one or more amine oxides represented by general formula (1). [ka] [In the formula, R 1 represents an alkyl group having 6 to 16 carbon atoms. 2 and R 3 each independently represents an alkyl group having 1 to 4 carbon atoms.

[0011] R 1 The alkyl group having 6 to 16 carbon atoms represented by the formula (I) may be linear, branched, or cyclic, but linear groups are preferred in terms of their high cleaning effect. Specific examples include hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl (lauryl), tridecyl, tetradecyl (myristyl), pentadecyl, and hexadecyl (cetyl). From the viewpoint of cleaning effect, one or more groups selected from lauryl and myristyl groups are preferred, with lauryl being more preferred.

[0012] R 2 and R 3 The alkyl group having 1 to 4 carbon atoms represented by the formula (I) may be linear, branched, or cyclic, but is preferably linear in terms of its high cleaning effect. Specific examples include methyl, ethyl, propyl, and butyl groups. In terms of cleaning effect, a methyl group is preferred.

[0013] R is a good choice for its excellent cleaning effect.1 , R 2 and R 3 The total number of carbon atoms in the alkyl groups in R is preferably 8 or more and 14 or less. 1 is a lauryl group (carbon number 12) and R 2 and R 3 is preferably a methyl group.

[0014] The content of component (b) is 0.05% by mass or more, preferably 0.075% by mass or more, and more preferably 0.1% by mass or more, in terms of a good cleaning effect, and is 1% by mass or less, preferably 0.9% by mass or less, and more preferably 0.8% by mass or less, in terms of the storage stability of component (a).

[0015] The fatty acid in the fatty acid salt of component (c) having 8 to 12 carbon atoms may be linear, branched, or cyclic, but linear fatty acids are preferred for their enhanced cleansing effect. Specific examples include caprylic acid, pelargonic acid, capric acid, and lauric acid.

[0016] The fatty acid salt of component (c) may be an alkali metal salt such as sodium or potassium, an alkaline earth metal salt such as calcium, or an ammonium salt of these fatty acids. From the viewpoints of high cleaning effect and easy availability, alkali metal salts are preferred, and sodium salts are more preferred.

[0017] The content of component (c) is 0.1% by mass or more, preferably 0.2% by mass or more, more preferably 0.3% by mass or more, from the viewpoint of a good cleaning effect, and 2% by mass or less, preferably 1.5% by mass or less, more preferably 1% by mass or less, from the viewpoint of the storage stability of component (a). In the present invention, the content of component (c) is expressed as a value converted into a fatty acid sodium salt.

[0018] The mass ratio (b) / (c) of the content of the component (b) to the content of the component (c) is, in terms of the effect of reducing the odor originating from the component (a), 0.05 or more, preferably 0.06 or more, more preferably 0.08 or more, even more preferably 0.1 or more, and is 1.0 or less, preferably 0.85 or less, more preferably 0.5 or less.

[0019] In the liquid detergent composition of the present invention, the mass ratio (a) / (b) of the content of component (a) to the content of component (b) is preferably 0.5 or more, more preferably 1.0 or more, even more preferably 1.8 or more, still more preferably 2.5 or more, and preferably 20 or less, more preferably 18 or less, and even more preferably 15 or less, from the viewpoint of the effect of reducing the odor derived from component (a). At the same time, the mass ratio (a) / (c) of the content of component (a) to the content of component (c) is preferably 0.2 or more, more preferably 0.4 or more, even more preferably 0.6 or more, even more preferably 0.8 or more, and preferably 8 or less, more preferably 4 or less, even more preferably 2.5 or less, and even more preferably 1.8 or less, from the viewpoint of the effect of reducing the odor derived from component (a).

[0020] In terms of odor-reducing effect, the liquid detergent composition of the present invention contains component (d) an alkali metal hydroxide and an alkali metal salt of a weak acid, the weak acid being a compound selected from among compounds having a pKa of 10 or more at 25°C.

[0021] Specific examples of alkali metal hydroxides include sodium hydroxide and potassium hydroxide. An alkali metal salt of a weak acid is defined as an alkali metal salt of an acid having a pKa of 10 or more at 25°C. Examples of weak acids include silicic acids such as H2SiO3, H4SiO4, H2Si2O5, and H2Si4O9. More specific examples of alkali metal salts of weak acids include alkali metal silicates such as sodium metasilicate (Na2SiO3) and sodium orthosilicate (Na4SiO4).

[0022] The alkali metal hydroxides and alkali metal salts of weak acids may be used alone or in combination. From the viewpoints of storage stability and availability of component (a), it is preferable to use an alkali metal hydroxide, and it is more preferable to use sodium hydroxide alone. Furthermore, component (d) may be used in the form of an aqueous solution in advance, which is convenient for the production of the liquid detergent composition.

[0023] The content of component (d) is related to the amount of hydroxide ions, i.e., free alkali, present in the liquid detergent composition of the present invention described above, and corresponds to the amount required to satisfy the pH described below. From the viewpoint of odor suppression effect, it is 0.1% by mass or more, preferably 0.2% by mass or more, more preferably 0.3% by mass or more, and from the viewpoint of the stability of component (a), it is 1% by mass or less, preferably 0.9% by mass or less, more preferably 0.8% by mass or less. The content of component (c) in the liquid detergent composition of the present invention is determined by measuring the free alkali (neutralization titration method, value converted to sodium hydroxide salt) according to the Sodium Hypochlorite Standard for Water Supply (JWWAK120) (JWWAK120).

[0024] The pH of the liquid detergent composition of the present invention at 25°C is 12.0 or more, preferably 12.5 or more, and 14.0 or less, preferably 13.5 or less, in terms of odor-reducing effect.

[0025] The viscosity of the liquid detergent composition of the present application at 25°C is preferably 0.1 mPa·s or more, more preferably 0.5 mPa·s or more, even more preferably 1.0 mPa·s or more, and preferably 100 mPa·s or less, more preferably 50 mPa·s or less, even more preferably 30 mPa·s or less. By having the above viscosity, the liquid detergent composition can be sprayed from a trigger-type container. The viscosity here was measured using a BL type viscometer (manufactured by Toki Sangyo Co., Ltd.) with a BL adapter at 25° C. and a rotation speed of 60 rpm after stirring for 1 minute.

[0026] The liquid detergent composition of the present invention may contain other additives such as foaming agents, foaming agents, penetrating agents, chelating agents, dispersants, binder resins, fragrances, antifungal agents, antibacterial agents, solvents, hydrotropes, viscosity adjusters, pH adjusters, rust inhibitors, etc. These additives may be contained in the liquid detergent composition of the present invention in an amount of 0.01% by mass or more and 2% by mass or less, within a range that does not impair the storage stability of component (a).

[0027] The remainder of the liquid detergent composition of the present application other than components (a), (b), (c), (d), and other components may be water.

[0028] The liquid detergent composition of the present invention can be used for sinks and drains in wet areas such as kitchens, bathrooms, and washrooms, etc. The material of these objects may be stainless steel, aluminum, tiles, or plastics such as polyvinyl chloride, olefin-based elastomers, polyurethane, and polyester.

[0029] The liquid detergent composition of the present application has a suitable viscosity, and therefore may be in the form of a liquid detergent article filled in a trigger-type container, and then the liquid detergent composition can be used by spraying it onto an object. As the trigger-type container, either a pressure-accumulation type trigger or a direct pressure type trigger is suitable. In addition, the liquid detergent composition of the present application may be applied to an object at a rate of 0.5 to 3 mL / cm. 2 Spraying can be effective in cleaning.

[0030] Examples of trigger sprayers include those described in Japanese Utility Model Publication No. 6-34858 and Japanese Patent Publication No. 63-2668. When the liquid detergent composition of the present invention is used by filling it into a discharge container equipped with a sprayer, it is preferable to apply the composition in the form of foam to the hard surface or to dirt adhering to the hard surface from the viewpoint of odor reduction effect.

[0031] The bubble-forming mechanism preferably includes a spin element and a liquid passage plate having several rod-shaped protrusions arranged in a circular space having a diameter of 4 to 8 mm. The spin element is a mechanism that imparts spin to a liquid flow through the spin element and finally ejects the liquid from a nozzle. For detailed structure, reference can be made to Figure 4(b) of JP-A-8-332422 and JP-A-8-108102, and Figure 1 of JP-A-2002-68265. The liquid passage plate, another component of the bubble-forming mechanism, has preferably 3 to 8 rod-shaped protrusions arranged in a circular space having a diameter of 5 to 7 mm. When viewed from above, the rod-shaped protrusions are preferably rectangular and have a width of 0.8 to 1.2 mm and a length of 2 to 4 mm. Furthermore, the area occupied by the rod-shaped protrusions relative to the space excluding the rod-shaped protrusions is preferably 30 to 90 area%, more preferably 40 to 80 area%, and even more preferably 40 to 70 area%, and by installing such a liquid passage plate, the adhesion and retention of foam on vertical surfaces and the odor reduction effect are improved.

[0032] A commonly used container can be used as the discharge container equipped with a sprayer having a foam-forming mechanism. For example, it can be obtained from polyethylene as a raw material and manufactured by blow molding or the like. The thickness of the container may differ between the bottom and the side, and is preferably 0.05 to 3.0 mm, and the container capacity is preferably 200 to 1000 mL. When compounding the hypochlorite salt of component (a), the container is preferably opaque to suppress decomposition by light. To achieve opacity, it is preferable to use a container containing titanium oxide or the like, and in this case, the container preferably has a multi-layer structure, and the innermost liquid bleaching agent is particularly preferable. The layer that comes into contact with the composition is preferably free of metals.

[0033] The liquid detergent composition of the present application can be sprayed onto a target surface in the form of a liquid detergent article, and deposited in the form of a foam onto the target surface to be cleaned, thereby removing one or more of dirt, microorganisms, and malodorous substances from the surface to be cleaned.

[0034] The dirt in the present invention may be any dirt that can be decomposed, bleached, and cleaned by the action of oxidizing power and alkali, and examples thereof include stains (pigmented dirt), yellowing dirt, protein dirt, mold dirt, biofilm dirt, and drain dirt.

[0035] The microorganisms targeted in the present invention are bacteria, fungi, and viruses (although viruses are not academically included in the category of "living organisms" because they cannot self-replicate, they are included in the present application in the sense of being invisible pathogens). The bacteria include both gram-positive and gram-negative bacteria, such as Staphylococcus aureus, and gram-negative bacteria such as Escherichia coli and Methylobacterium bacteria, which are the main constituents of pink stains in bathrooms.

[0036] Examples of fungi include one or more molds selected from the genera Cladosporium, Aspergillus, Candida, Penicillium, Alternaria, Phoma, Exophiala, and Aureobasidium.

[0037] Examples of viruses include enveloped viruses such as herpes viruses, influenza viruses, paramyxoviruses, rabies viruses, respiratory syncytial viruses, coronaviruses, HIV, smallpox viruses, hepatitis B viruses, hepatitis C viruses, hepatitis D viruses, rubella viruses, SARS coronaviruses (SARS-CoV), MERS coronaviruses (MERS-CoV), and phage viruses. Non-enveloped viruses include viruses belonging to the Caliciviridae, Picornaviridae, Parvoviridae, Papillomaviridae, Polyomaviridae, and Adenoviridae families.

[0038] The malodorous substances targeted by the present invention are malodors generated in living environments such as kitchens, toilets, bathrooms, etc. Examples include malodors from aldehydes, amines, mercaptans, lower fatty acids (acetic acid, propionic acid, butyric acid, etc.), etc.

[0039] The liquid detergent composition of the present application can be sprayed onto an object and then left to stand for a certain period of time to allow the liquid detergent composition to remain on the surface to be cleaned, thereby achieving more effective cleaning. From the viewpoint of improving the cleaning effect, the standing time is preferably 30 seconds or more, more preferably 2 minutes or more, even more preferably 5 minutes or more, and even more preferably 10 minutes or more, and from the viewpoint of minimizing damage to the surface to be cleaned, the standing time is preferably 2 hours or less, more preferably 1 hour or less, and even more preferably 30 minutes or less.

[0040] The liquid detergent composition of the present application contains an alkali metal hypochlorite salt at a content of 0.1% by mass to 1% by mass, which is lower than that of conventional detergent compositions. By preparing the liquid detergent composition with a predetermined composition, the odor caused by the alkali metal hypochlorite salt can be reduced without reducing the cleaning effect. [Example]

[0041] <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.

[0042] The materials used in the examples and comparative examples are listed below. <Component (a)> Sodium hypochlorite "Sodium hypochlorite in a medium-sized meal" (sodium hypochlorite content 12.5% by mass, manufactured by Nankai Chemical Co., Ltd.) <(b) Component> Dodecyl dimethyl lauryl amine oxide "Amphitol 20N" (Kao Corporation) <(c) component> Sodium decanoate "Lunac 10-98" (Kao Corporation) sodium salt <(d) component> Sodium hydroxide "caustic soda (32%)" (manufactured by Nankai Chemical Co., Ltd.)

[0043] <Preparation Example> Taking Example 1 as an example, the preparation method is shown below. A predetermined amount of 32% by mass aqueous sodium hydroxide solution (component (d)), dimethyl lauryl amine oxide (component (b)), and capric acid (component (c)) were added to ion-exchanged water in that order and stirred to dissolve. Finally, a predetermined amount of sodium hypochlorite (component (a)) was added and stirred thoroughly to obtain a liquid detergent composition.

[0044] <Chlorine odor intensity (sensory evaluation)> The liquid detergent composition was sprayed five times into a 300 mL plastic cup, and immediately afterwards, the hypochlorous acid odor was evaluated sensorily. The evaluation criteria were as follows: 4: A very slight odor of hypochlorous acid is detected, but it is at a detectable level. 3: A faint hypochlorous acid odor is detectable, at a recognizable level. 2: The odor of hypochlorous acid is easily detected. 1: The smell of hypochlorous acid is clearly noticeable. The results are shown in Table 1.

[0045] <Foam adhesion> A liquid detergent composition filled in a spray bottle of Kitchen Foam Haiter (Lot. K0702893) was sprayed once onto a stainless steel plate (20 x 30 cm) placed at a 45° angle, and the time it took for the foam to drip 25 cm was measured. A higher value indicates higher foam adhesion. The results are shown in Table 1.

[0046] [Table 1]

[0047] In Examples 1 to 9, which contained predetermined amounts of components (a) to (d), had a mass ratio of the content of (b) to the content of (c), (b) / (c), of 0.05 to 1, and a pH at 25°C of 12.0 to 14.0, the chlorine odor intensity was low, at a perceptible or detectable level. In Comparative Example 1, which contained 1.5 mass% of component (a), Comparative Example 2, which had a pH of 11.5, and Comparative Example 3, which had a (b) / (c) ratio of 2.5, the hypochlorous acid odor was easily or clearly noticeable.

[0048] Furthermore, Examples 1 to 9 and Comparative Examples 1 and 2 exhibited good bubble adhesion of 33 seconds or more, while Comparative Example 3 exhibited a low bubble adhesion of 5 seconds.

[0049] <Cleaning ability> A liquid cleaning composition filled in a spray bottle of Kitchen Foam Haiter (Lot. K0702893) was sprayed once onto a cutting board coated with curcumin dye (manufactured by Tokyo Chemical Industry Co., Ltd.), left for 5 minutes, and then rinsed with tap water. The cleaning rate was calculated from the change in gray value before and after cleaning.

[0050] Example 3, which contained 0.2% of component (a), had a cleaning rate of 70%, but the other Examples 1, 2, and 4 to 10 all had cleaning rates of 80% or more.

[0051] <Storage stability (evaluation method for storage stability of alkali metal hypochlorite)> 100 mL of the cleaning composition was placed in a polypropylene container and stored at 50°C for 1 month, and the remaining available chlorine concentration was measured by the following method. The ratio of the remaining available chlorine concentration after storage to the initial available chlorine concentration was defined as the remaining available chlorine rate. Method for measuring available chlorine concentration: 50 mL of ion-exchanged water, 0.5 g of potassium iodide (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), 20 mL of 10% sulfuric acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), and 5 drops of starch indicator (manufactured by Sigma-Aldrich Co., Ltd.) were added to 5 g of the cleaning composition and dissolved, and the solution was titrated with 0.1 M sodium thiosulfate (manufactured by 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.

[0052] Under the above storage conditions, Examples 1 to 8 had an available chlorine remaining rate of 80% or more, but Example 9 had an available chlorine remaining rate of 70%.

[0053] Liquid detergent compositions shown in Table 2 were prepared in the same manner as above, by blending the above components (a) to (d) with the following optional components. Sodium polyoxyethylene lauryl ether sulfate "EMAL 20CS" (average number of oxyethylene groups added: 3, manufactured by Kao Corporation) Sodium lauryl sulfate "Emal 0" (Kao Corporation) Sodium alkyl (C10-14) benzenesulfonate "Neopelex G-25" (Kao Corporation) Sodium metasilicate "No. 2 sodium silicate" (manufactured by Fuji Chemical Co., Ltd.)

[0054] [Table 2]

[0055] The odor of an aqueous solution containing an alkali metal hypochlorite salt can be reduced by spraying a liquid detergent composition containing components (a) to (d) and each optional component in the ranges shown in Table 2 onto an item using a trigger sprayer or the like.

Claims

1. The following components (a) to (d) (a) component: alkali metal hypochlorite in a content of 0.1% by mass or more and 1.2% by mass or less; Component (b): A component represented by the general formula (1) in a content of 0.05% by mass or more and 1% by mass or less 【Chemical 1】 [In the formula, R １ represents an alkyl group having 6 to 16 carbon atoms. ２ and R ３ each independently represents an alkyl group having 1 to 4 carbon atoms. an amine oxide represented by Component (c): a fatty acid salt having 8 to 12 carbon atoms and a content of 0.1% by mass to 2% by mass Component (d): a compound selected from alkali metal hydroxides and alkali metal salts of weak acids, the content of which is 0.1% by mass or more and 1% by mass or less, wherein the weak acids have a pKa of 10 or more at 25°C; and A liquid detergent composition containing water, wherein the mass ratio of the content of (b) to the content of (c), (b) / (c), is 0.05 or more and 1.0 or less, and wherein the pH at 25°C is 12.0 or more and 14.0 or less.

2. 2. The liquid detergent composition according to claim 1, wherein the content of component (a) is 0.4% by mass or more and 0.8% by mass or less.

3. 2. The liquid detergent composition according to claim 1, wherein the mass ratio of the content of component (b) to the content of component (c), (b) / (c), is 0.1 or more and 0.85 or less.

4. 2. The liquid detergent composition according to claim 1, wherein the pH at 25°C is 12.5 or more and 13.5 or less.

5. R in general formula (1) ２ and R ３ The liquid detergent composition according to claim 1, wherein is a methyl group.

6. R in general formula (1) １ , R ２ and R ３ 2. The liquid detergent composition according to claim 1, wherein the total number of carbon atoms is 8 or more and 14 or less.

7. 10. The liquid cleaning composition of claim 1, for use on hard surfaces selected from kitchens, bathrooms, and toilets.

8. A liquid detergent article comprising the liquid detergent composition according to any one of claims 1 to 7 filled in a discharge container equipped with a trigger-type sprayer.

9. A cleaning method comprising applying the liquid detergent composition according to any one of claims 1 to 7 in foam form to a surface to be cleaned, thereby removing one or more of dirt, microorganisms, and malodorous substances.

10. A method for reducing odors caused by alkali metal hypochlorite salts when a foamy aqueous solution of sodium hypochlorite is applied to a surface to be cleaned, the method comprising preparing the liquid detergent composition according to any one of claims 1 to 7.

Images