Detergent composition

Abstract

To provide a detergent composition which, even when having a minute amount of a metal present therein, enables a container containing such a detergent composition to be prevented from expanding.SOLUTION: A detergent composition contains silicate, a chlorine agent, and a hydroxide. The detergent composition has a silicate content of 0.050 mass% or more and 4.0 mass% or less based on 100 mass% of the detergent composition.SELECTED DRAWING: None

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE This disclosure relates generally to cleaning compositions, and more particularly to cleaning compositions containing chlorine agents. [Background technology]

[0002] Aqueous solutions containing chlorine agents such as sodium hypochlorite are widely used as kitchen detergents, bleaches for clothing, toilet cleaners, bathroom cleaners, mold removers, and the like. These chlorine agents gradually decompose in aqueous solution, generating gas. Furthermore, the presence of even trace amounts of metal in the aqueous solution containing the chlorine agent accelerates the reaction, resulting in increased gas generation. Therefore, if the container containing the aqueous solution containing the chlorine agent is made of a material with low rigidity, the generated gas increases the internal pressure of the container, causing the container to expand, potentially resulting in the container bursting or the contents ejecting when the lid is opened. Conventional solutions to this problem include improving the container by increasing its thickness or providing ribbing, or incorporating specific compounds or mixtures to capture the generated gas or inhibit the decomposition of the chlorine agent.

[0003] Patent Document 1 discloses a bleaching agent composition. This bleaching agent composition contains an alkali metal hypochlorite and a phosphate ester surfactant. Furthermore, the available chlorine concentration in the bleaching agent composition is 0.1 to 13% by weight. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-003083 Summary of the Invention [Problem to be solved by the invention]

[0005] However, Patent Document 1 has a problem in that when a trace amount of metal is present in the bleaching composition, it is difficult to prevent the expansion of the container containing such a bleaching composition.

[0006] An object of the present disclosure is to provide a cleaning composition that can suppress expansion of a container containing the cleaning composition even when a trace amount of metal is present in the cleaning composition. [Means for solving the problem]

[0007] A cleaning composition according to one embodiment of the present disclosure contains a silicate, a chlorine agent, and a hydroxide, and the content of the silicate is 0.050% by mass or more and 4.0% by mass or less, based on 100% by mass of the cleaning composition. [Effects of the Invention]

[0008] According to the present disclosure, there is provided a cleaning composition that can suppress expansion of a container containing such a cleaning composition even when a trace amount of metal is present in the cleaning composition. DETAILED DESCRIPTION OF THE INVENTION

[0009] 1. Overview Embodiments of the present disclosure will be described. Note that the following embodiments are merely a portion of various embodiments of the present disclosure. Furthermore, the following embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, although the mechanism of action in the embodiments may be described, this description of the mechanism of action includes an explanation based on speculation, and the present disclosure is not bound by the description of the mechanism of action.

[0010] A cleaning composition according to an embodiment contains a silicate, a chlorine agent, and a hydroxide. The cleaning composition can be used as a mold remover, a cleaner for bathrooms, sinks, kitchen drainage pipes, washing machine drums, etc., a bleach for clothing, an anti-mold agent, a disinfectant, a virus remover, etc. Details will be described later, but in this embodiment, the silicate content and the type of each component are described.

[0011] According to an embodiment, the cleaning composition contains a silicate, so that even if a trace amount of metal is present in the cleaning composition, the cleaning composition can suppress expansion of a container containing the cleaning composition.

[0012] 2.Details (component) <Silicate> The detergent composition contains a silicate, which can suppress expansion of a container containing the detergent composition even when a trace amount of metal is present in the detergent composition.

[0013] The reason why silicates can exert the above-mentioned effects has not been clearly clarified, but is presumed to be due to the following reasons.

[0014] The cleaning composition contains a chlorine agent, which gradually decomposes in an aqueous solution to generate gas. Furthermore, the presence of even trace amounts of metal in the aqueous solution accelerates the reaction, resulting in increased gas generation. In this case, metals include not only simple metals but also metal compounds such as metal oxides, halides, sulfides, and nitrides, as well as metal ions. When the cleaning composition is stored in a container, the gas generation increases the internal pressure of the container, potentially causing the container to expand, deform, or burst. If silicate is present in the aqueous solution, the silicate coats the metal and forms colloidal fine particles. It is presumed that the metal is less likely to come into contact with the chlorine agent, preventing the reaction from being accelerated and suppressing gas generation. Therefore, even when a trace amount of metal is present in the cleaning composition, the expansion of the container containing the cleaning composition can be suppressed.

[0015] Silicates can also exhibit a rust-preventing effect as follows: Silicates react with metal surfaces of pipes, parts, and containers of manufacturing equipment, or with metal ions derived from the above that are dissolved in aqueous solutions, to produce silicates. These silicates are deposited on the metal surfaces of pipes, parts, and containers of manufacturing equipment, and exist as films, which make it difficult for the metal surfaces to come into contact with corrosive chemicals, thereby exhibiting a rust-preventing effect.

[0016] The silicate content is 0.050% by mass or more, preferably 0.20% by mass or more, more preferably 0.28% by mass or more, and even more preferably 0.30% by mass or more, based on 100% by mass of the cleaning composition. Even if trace amounts of metals are present in the cleaning composition, swelling of the container containing the cleaning composition can be suppressed. The silicate content is 4.0% by mass or less, preferably 1.2% by mass or less, and more preferably 0.60% by mass or less, based on 100% by mass of the cleaning composition. Since the silicate is completely dissolved in the solvent and no silicate precipitation occurs, clogging of the piping in the cleaning composition production facility and the drainage pipes of the cleaning target can be suppressed. When a silicate hydrate is used, the silicate content is calculated as 100% purity, excluding the water of hydration.

[0017] The silicate is not particularly limited, but examples thereof include sodium metasilicate, sodium orthosilicate, potassium metasilicate, potassium orthosilicate, sodium disilicate, and potassium disilicate. The silicate may be an anhydrous or hydrated. Sodium metasilicate is preferred as the silicate. Furthermore, sodium metasilicate may be used alone or in combination with other silicates.

[0018] <Chlorine agent> The cleaning composition contains a chlorine agent. The chlorine agent is a cleaning component in the cleaning composition.

[0019] The chlorine agent is not particularly limited, but for example, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, hypochlorous acid, sodium chlorite, potassium chlorite, calcium chlorite, chlorinated sodium isocyanurate, chlorinated isocyanuric acid, etc. are listed. As the chlorine agent, sodium hypochlorite is preferred. Furthermore, as the chlorine agent, sodium hypochlorite may be used alone or in combination with other chlorine agents.

[0020] <Hydroxide> The cleaning composition contains a hydroxide, which is a stabilizer for the chlorine agent.

[0021] The hydroxide is not particularly limited, but examples thereof include sodium hydroxide and potassium hydroxide. As the hydroxide, sodium hydroxide is preferred. Furthermore, as the hydroxide, sodium hydroxide may be used alone or in combination with other hydroxides.

[0022] <Other additives> The detergent composition may or may not contain additives other than the silicates, chlorine agents, and hydroxides listed above. Examples of the additives include, but are not limited to, surfactants, chelating agents, water softeners, fragrances, thickeners, foam regulators, stabilizers, colorants, pH adjusters, bleach activators, excipients, antistatic agents, disinfectants, enzymes, foaming agents, and binders.

[0023] (evaluation) <Properties> The detergent composition is, for example, a liquid mixture containing water as a solvent at 25° C., and this liquid mixture is preferably basic or neutral. If the liquid mixture is basic or neutral, silicates are chemically stable, and therefore, even if a trace amount of metal is present in the detergent composition, the detergent composition can exhibit the effect of suppressing expansion of a container containing the detergent composition.

[0024] <Container expansion rate> The cleaning composition of the present disclosure can suppress the expansion of a container containing such a cleaning composition, even when a trace amount of metal is present in the cleaning composition. For example, the cleaning composition and metal powder are placed in a low-rigidity container. The material of the container is not particularly limited, and may be made of, for example, resin or metal, as long as it is not corroded by the components of the cleaning composition. Furthermore, if gas is generated inside the container when it is sealed, the internal pressure inside the container increases, and the container may easily expand and deform. After a certain period of time has passed, the volume of the container is measured and compared with the initial volume of the container. The expansion rate of the container volume is preferably 3% or less, more preferably 2% or less, even more preferably 1% or less, and even more preferably 0.5% or less. Furthermore, the container preferably has a stable appearance with little tilting or wobbling due to deformation, and is most preferably upright without tilting or wobbling. Details of the evaluation method are provided in the Examples.

[0025] 3. Aspects As is apparent from the above embodiments, the present disclosure includes the following aspects.

[0026] A first aspect is a cleaning composition containing a silicate, a chlorine agent, and a hydroxide, wherein the content of the silicate is 0.050% by mass or more and 4.0% by mass or less, based on 100% by mass of the cleaning composition.

[0027] According to this embodiment, even when a trace amount of metal is present in the cleaning composition, expansion of a container containing such a cleaning composition can be suppressed.

[0028] A second aspect is a cleaning composition according to the first aspect, wherein the silicate comprises sodium metasilicate.

[0029] According to this embodiment, even when a trace amount of metal is present in the cleaning composition, expansion of a container containing such a cleaning composition can be further suppressed.

[0030] A third aspect is a cleaning composition according to the first or second aspect. In the third aspect, the cleaning composition is basic or neutral.

[0031] According to this embodiment, the silicate is chemically stable, and therefore, even if a trace amount of metal is present in the detergent composition, expansion of a container containing such a detergent composition can be further suppressed.

[0032] A fourth aspect is a cleaning composition based on any one of the first to third aspects. In the fourth aspect, the chlorine agent includes sodium hypochlorite.

[0033] According to this embodiment, the cleaning effect can be improved compared to other chlorine agents.

[0034] A fifth aspect is a cleaning composition based on any one of aspects 1 to 4. In the fifth aspect, the hydroxide comprises sodium hydroxide.

[0035] According to this embodiment, the chlorine agent can be stabilized more than other hydroxides. [Example]

[0036] The present disclosure will be specifically described below with reference to examples, but the present disclosure is not limited to these examples.

[0037] 1. Preparation of the composition Each of the cleaning compositions of Examples and Comparative Examples was prepared by mixing the components shown in Table 1. The components in the table are as follows.

[0038] Silicate #1: Chemical compound name "sodium metasilicate pentahydrate", purity 56-59%, manufactured by Nagai Pharmaceutical Co., Ltd., product name "sodium metasilicate pentahydrate".

[0039] Chlorine agent #1: Chemical compound name "sodium hypochlorite", manufactured by Nankai Chemical Co., Ltd., product name "sodium hypochlorite".

[0040] Hydroxide #1: Chemical compound "sodium hydroxide", manufactured by Nankai Chemical Co., Ltd., product name "caustic soda solution".

[0041] Solvent #1: Ion-exchanged water, manufactured by Lion Chemical Co., Ltd., product name "Ion-exchanged water."

[0042] 2. Evaluation Method (Container expansion rate) First, the raw materials were mixed and stirred in the ratios shown in Table 1 to prepare the cleaning compositions of the Examples and Comparative Examples. 400 g of each prepared cleaning composition was placed in a container, and then 0.005 g of rust powder was placed in the container and the container was sealed. The container was bottle-shaped and made of a resin with low rigidity, with a maximum outer diameter of 68 mm, a height of 221 mm, a thickness of 1 to 1.8 mm, and a volume of 447.6 cm. 2 The rust powder was generated on the surface of corroded stainless steel cast steel (SCS13) by immersing the stainless steel cast steel in a 12% sodium hypochlorite aqueous solution. The sealed container was stored in a thermostatic chamber set at 50°C for 48 hours. After 48 hours, the container was removed from the thermostatic chamber and its volume was measured. The measured volume of the container was divided by the initial volume of the container to calculate the expansion rate of the container. The evaluation results are shown in Table 1.

[0043] [Table 1]

[0044] As shown in Comparative Example 1, when the silicate content is less than 0.050% by mass, the expansion rate of the container increases when a trace amount of metal is present in the detergent composition. On the other hand, as shown in Examples 1 to 5, when the silicate content is 0.050% by mass or more, the expansion rate of the container is suppressed even when a trace amount of metal is present in the detergent composition.

Claims

1. A cleaning composition comprising: The cleaning composition contains a silicate, a chlorine agent, and a hydroxide, the content of the silicate is 0.050% by mass or more and 4.0% by mass or less, based on 100% by mass of the detergent composition; Cleaning composition.

2. The silicate comprises sodium metasilicate. The cleaning composition according to claim 1.

3. basic or neutral, The cleaning composition according to claim 1.

4. The chlorine agent includes sodium hypochlorite. The cleaning composition according to claim 1.

5. The hydroxide includes sodium hydroxide. The cleaning composition according to claim 1.

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