HOUSEHOLD DETERGENT COMPOSITION AND METHOD FOR PRODUCING HOUSEHOLD DETERGENT COMPOSITION

Abstract

The present invention provides a household cleaning composition that has a low environmental impact and excellent cleaning properties, and a method for producing the household cleaning composition. [Solution] The household detergent composition of the present invention contains a fatty acid alkali metal salt, a sinter powder, an alkali metal silicate, and an abrasive. In one embodiment, the method for producing the household detergent composition of the present invention includes a step of mixing a fatty acid alkali metal salt and a powder containing amorphous silicon dioxide and / or a silicate in a medium containing water while heating to produce an alkali metal silicate.

Description

[Technical field]

[0001] The present invention relates to a household cleaning composition and a method for producing the same. [Background technology]

[0002] Cleansers are used in the home, such as kitchen sinks, stoves, bathrooms, and toilets, as well as to clean cooking utensils, tableware, food, etc. Cleansers contain abrasives in addition to surfactants, and are particularly suitable for cleaning hard surfaces.

[0003] Cleansers are mainly available in powder and liquid form, and are used appropriately depending on the application, etc. In addition to the above-mentioned surfactants, these cleansers contain various additives such as dispersants for dispersing abrasives, bleaching agents, solvents, enzymes, etc., as necessary.

[0004] For example, Patent Document 1 proposes a liquid cleanser composition having excellent stability over time, characterized by uniformly dispersing (a) a polyoxyalkylene alkyl ether, (b) sulfamic acid, (c) silicon dioxide, and (d) an alcohol-based solvent and / or an ether-based solvent in water, and a method for producing the same. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-183472 A Summary of the Invention [Problem to be solved by the invention]

[0006] By the way, the surfactants and additives used in cleansers are mainly synthetic compounds, which, depending on the type, are poorly or not at all biodegradable and place a burden on the environment when discharged.

[0007] Conventionally, so-called soap detergents such as fatty acid sodium salts have been known as surfactants for detergent compositions. Soap detergents are alkali metal salts of fatty acids derived from natural fats and oils, and are highly biodegradable. Therefore, even if soap detergents are discharged into the external environment, the environmental impact is small.

[0008] On the other hand, soap detergents may not be able to fully function depending on the circumstances. For example, soap detergents dissolve only at relatively high temperatures, and the viscosity of the solution is high, so they are not easily mixed with abrasives. As a result, the abrasives may become rough during use, and water may not drain well during rinsing. In addition, for example, when using soap detergents, if hard water containing a large amount of magnesium ions, calcium ions, etc. is used, fatty acids form insoluble salts with magnesium ions, calcium ions, etc., and as a result, the cleaning ability of fatty acids and, ultimately, the detergent is lost. Therefore, the inventors faced the problem that even if soap detergents are simply used as surfactants for cleansers in consideration of environmental load, they cannot have sufficient performance as cleansers.

[0009] Therefore, an object of the present invention is to provide a household cleaning composition which has a low environmental impact and excellent cleaning properties, and a method for producing said household cleaning composition. [Means for solving the problem]

[0010] The gist of the present invention is as follows. [1] A method for producing a household cleaning composition, comprising the step of mixing, while heating, a fatty acid alkali metal salt and a powder containing amorphous silicon dioxide and / or amorphous silicate in a medium containing water, thereby producing an alkali metal silicate. [2] A step of mixing a powder containing amorphous silicon dioxide and / or amorphous silicate with an aqueous solution containing alkali metal ions to obtain a composition containing an alkali metal silicate derived from at least a portion of the powder; and mixing the composition with a fatty acid alkali metal salt. [3] The method for producing a household cleaning composition according to [1] or [2], wherein the powder contains siliceous stone powder. [4] The method for producing the household cleaning composition according to [1], further comprising the step of adding an abrasive to the mixture of the fatty acid alkali metal salt and the powder and mixing the mixture. [5] A fatty acid alkali metal salt, Silica powder; An alkali metal silicate; A household cleaning composition comprising an abrasive. [6] The household cleaning composition according to [5], wherein the alkali metal contained in the fatty acid alkali metal salt is the same as the alkali metal contained in the alkali metal silicate. [7] The household cleaning composition according to [5], wherein the alkali metal silicate comprises an alkali metal silicate derived from the silicate powder. [8] The household cleaning composition according to [5], which is in a paste form. Effect of the Invention

[0011] As described above, according to the present invention, it is possible to provide a household cleaning composition that has a low environmental impact and excellent cleaning properties, and a method for producing said household cleaning composition. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 shows photographic images of a glass plate cleaned using the household cleaner compositions according to the examples and the comparative examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the household cleaning composition according to the present invention and preferred embodiments of the household cleaning composition will be described in detail with reference to the drawings.

[0014] <1. Household cleaning agents> First, a household cleaning composition according to a preferred embodiment of the present invention will be described. The household cleaning composition according to this embodiment contains a fatty acid alkali metal salt, sinter powder, an alkali metal silicate, and an abrasive.

[0015] The fatty acid alkali metal salt is a salt of a fatty acid and an alkali metal ion. In addition, the fatty acid alkali metal salt partially dissociates in water to generate fatty acid ions or fatty acids, which function as surfactants. Specifically, during washing, micelles (colloidal particles) of fatty acids are formed around the dirt, and the dirt is suspended in water. In addition, the fatty acid alkali metal salt uses fatty acids derived from natural oils and fats, and has excellent biodegradability.

[0016] Fatty acids that can be used in fatty acid alkali metal salts are not particularly limited, and examples thereof include short-chain fatty acids having less than 6 carbon atoms, such as butyric acid (C4:0) and valeric acid (C5:0), medium-chain fatty acids having 6 to 12 carbon atoms, such as caproic acid (C6:0), enanthic acid (C7:0), caprylic acid (C8:0), pelargonic acid (C9:0), capric acid (C10:0), and lauric acid (C12:0), myristic acid (C14:0), pentadecylic acid (C15:0), palmitic acid (C16:0), palmitoleic acid (C16:1), margaric acid (C17:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), α-linolenic acid (C18:3), γ-linolenic acid (C18:4), α-linolenic acid (C18:5), α-linolenic acid (C18:6), α-linolenic acid (C18:7), α-linolenic acid (C18:8), α-linolenic acid (C18:9), α-linolenic acid (C18:1), α-linolenic acid (C18:1), α-linolenic acid (C18:2), α-linolenic acid (C18:3), α-linolenic acid (C18:4), α-linolenic acid (C18:5), α-linolenic acid (C18:6), α-linolenic acid (C18:7), α-linolenic acid (C18:8), α-linolenic acid (C18:9), α-linolenic acid (C18:1), α-linolenic acid (C18:1), α-linolenic acid (C18 -Linolenic acid (C18:3), eleostearic acid (C18:3), arachidic acid (C20:0), 8,11-eicosadienoic acid (C20:2), mead acid (C20:3), arachidonic acid (C20:4), eicosapentaenoic acid (C20:5), and other long-chain fatty acids having 13 to 21 carbon atoms; behenic acid (C22:0), docosahexaenoic acid (C22:6), lignoceric acid (C24:0), nervonic acid (C24:1), cerotic acid (C26:0), montanic acid (C28:0), melissic acid, docosahexaenoic acid (C30:0), and other very long-chain fatty acids having 22 or more carbon atoms; and the like. One of these can be used alone, or two or more can be used in combination. In addition, the number to the left of the "C" in the above parentheses indicates the number of carbon atoms in the fatty acid, and the number to the right indicates the number of double bonds. In other words, among the fatty acids listed above, those with a right-hand number in the parentheses of 1 or more are unsaturated fatty acids, and those with a right-hand number in the parentheses of 0 are saturated fatty acids.

[0017] Among the above, taking into consideration the balance between solubility in cold water and detergency, the fatty acid alkali metal salt preferably contains a medium-chain fatty acid and / or a long-chain fatty acid, more preferably a long-chain fatty acid, and even more preferably oleic acid as the fatty acid. In particular, oleic acid has an unsaturated bond, is excellent in solubility in cold water, and has excellent detergency.

[0018] In addition, fatty acid alkali metal salts are usually obtained by hydrolyzing natural fats and oils.Therefore, the fatty acid in fatty acid alkali metal salts is composed of a plurality of fatty acids derived from the natural fats and oils used.Such natural fats and oils are not particularly limited, but include animal fats and oils such as butter, beef tallow, lard, and fish oil, and vegetable oils such as coconut oil, palm oil, palm kernel oil, olive oil, rapeseed oil, safflower oil, soybean oil, rice bran oil, castor oil, cottonseed oil, and peanut oil, and one of these can be used alone or two or more can be used in combination.

[0019] Among the above, the fatty acid alkali metal salt preferably contains a fatty acid derived from one or more selected from coconut oil, palm oil, beef tallow, and lard.

[0020] The alkali metal constituting the fatty acid alkali metal salt is not particularly limited, but examples thereof include lithium, sodium, potassium, rubidium, cesium, and francium, and one of these may be used alone or two or more may be used in combination. Preferably, the alkali metal includes sodium and / or potassium, and more preferably, the alkali metal includes sodium.

[0021] The content of the fatty acid alkali metal salt in the household detergent composition is not particularly limited, but is, for example, from 1.0% by mass to 40% by mass, and preferably from 5.0% by mass to 25% by mass.

[0022] The household detergent composition also contains silicic acid powder. The silicic acid powder is made of silicic acid powder, which is a mineral formed when hydrated silicic acid compressed deep underground erupts on the ground surface, cools, and is decompressed. Silicic acid is found, for example, as hot spring deposits in hot springs. Silicic acid is amorphous hydrated silicic acid, and a part of it is soluble in water.

[0023] Taking advantage of such properties of sinter, in this embodiment, the sinter powder first acts as an abrasive. The primary particles of the sinter powder are ultrafine, and when using the household detergent composition, it can remove dirt while preventing scratches on the object to be cleaned. Meanwhile, a part of the sinter powder dissolves in the household detergent composition during production to become an alkali metal silicate.

[0024] In this way, the sinter powder simultaneously functions as an abrasive and maintains the cleaning properties of the fatty acid alkali metal salt. The household cleaner composition of the present embodiment effectively utilizes the properties of this sinter powder to achieve excellent cleaning properties.

[0025] The content of the sinter powder in the household detergent composition is not particularly limited, but is, for example, 0.1% by mass to 50% by mass, preferably 1.0% by mass to 20% by mass. The ratio of the abrasive of the sinter powder to the alkali metal silicate can be appropriately set by the method described later.

[0026] The household detergent composition also contains an alkali metal silicate. The alkali metal silicate maintains the pH of the household detergent composition on the alkaline side and improves the cleaning ability of the fatty acid alkali metal salt. When the household detergent composition is used in hard water, the alkali metal silicate preferentially reacts with calcium ions and magnesium ions to form a salt, thereby preventing the fatty acid from reacting with calcium ions and magnesium ions to reduce the cleaning ability. Furthermore, the alkali metal silicate assists in the dispersion of sintered stone powder and other abrasives in the household detergent composition.

[0027] The silicic acid in the alkali metal silicate may be in any crystalline form or may be amorphous. The alkali metal in the alkali metal silicate may be any alkali metal, including those mentioned above. The alkali metal silicate preferably contains sodium and / or potassium as the alkali metal, more preferably sodium.

[0028] In addition, the alkali metal in the alkali metal silicate is preferably the same as the alkali metal in the fatty acid alkali metal salt, which can improve the stability of each component in the household detergent composition.

[0029] It is also preferred that at least a part of the alkali metal silicate is derived from sinter powder, which further contributes to improving the dispersion stability of the sinter powder by the alkali metal silicate.

[0030] The content of the alkali metal silicate in the household detergent composition is not particularly limited, but is, for example, from 0.1% by mass to 50% by mass, and preferably from 1.0% by mass to 20% by mass.

[0031] In addition, the household cleaner composition preferably contains an abrasive other than sinter powder. The abrasive polishes the surface of the object to be cleaned to remove dirt. Such abrasives are not particularly limited, and include calcium carbonate such as calcite and aragonite, silica, synthetic silica, silicon dioxide compounds such as diatomaceous earth, silicates such as talc, zeolite, feldspar, bentonite, acid clay, activated clay, and other montmorillonite-containing clays, aluminosilicates such as montmorillonite, pumice, volcanic ash, and the like, and one of these may be used alone or two or more may be used in combination.

[0032] The content of the abrasive other than the silicate powder in the household detergent composition is not particularly limited, but is, for example, from 5.0% by mass to 70% by mass, preferably from 10% by mass to 60% by mass.

[0033] In addition, the household cleaning composition usually contains water. The content of water in the household cleaning composition is not particularly limited, but is, for example, 5.0% by mass or more and 70% by mass or less, preferably 10% by mass or more and 60% by mass or less.

[0034] The household detergent composition described above may be in either a paste form or a liquid form. In the case of a paste-type household detergent composition, the water content is reduced while the abrasive content is increased. In the case of a liquid household detergent composition, the water content is increased while the abrasive content is reduced.

[0035] The household detergent composition according to the present embodiment described above uses a fatty acid alkali metal salt with excellent biodegradability as a surfactant, and has a small environmental impact. On the other hand, the sinter powder functions as an abrasive that is difficult to scratch ultrafine particles, and a part of it dissolves in the household detergent composition to become an alkali metal silicate. The sinter powder and the alkali metal silicate derived therefrom contribute to improving the dispersion stability of other abrasives. This provides a smooth feel when used and excellent cleaning properties.

[0036] In addition, fatty acid alkali metal salts have the disadvantage that they form salts with magnesium ions and calcium ions in hard water, resulting in a decrease in cleaning power. However, in this embodiment, this disadvantage is suppressed by the presence of sinter powder and alkali metal silicate.

[0037] That is, the silicic acid derived from the alkali metal silicate or the dissolved sinter powder preferentially forms salts with magnesium ions and calcium ions in the hard water, and as a result, the inactivation of fatty acids is suppressed. In particular, when the content of the alkali metal silicate in the sinter powder decreases, a part of it dissolves in water to form silicic acid, and the above-mentioned action can be achieved. As a result, the household detergent composition according to this embodiment can exhibit excellent detergency in many situations.

[0038] The household detergent composition according to this embodiment can be used for cleaning household items such as kitchen sinks, stoves, bathrooms, and toilets, as well as cooking utensils, tableware, and the like.

[0039] <2. Manufacturing method of household cleaning agents> First, some preferred embodiments of the method for producing a household cleaning composition according to the present invention will be described.

[0040] [2.1. First embodiment] The method for producing the household cleaning composition according to the first embodiment includes a step (first step) of mixing a powder containing amorphous silicon dioxide and / or amorphous silicate with an aqueous solution containing alkali metal ions to obtain a composition containing an alkali metal silicate derived from at least a portion of the powder, and a step (second step) of mixing the composition with a fatty acid alkali metal salt.

[0041] (First step) In this step, a powder containing amorphous silicon dioxide and / or amorphous silicate is mixed with an aqueous solution containing alkali metal ions to obtain a composition containing an alkali metal silicate derived from at least a portion of the powder.

[0042] Specifically, first, an aqueous solution containing alkali metal ions is prepared. The alkali metal ion source is not particularly limited, but may be an alkali metal hydroxide, an alkali metal carbonate, etc. For example, the concentration of the alkali metal ion source is not particularly limited, but may be, for example, 1% by mass or more and 20% by mass or less, preferably 5% by mass or more and 10% by mass or less.

[0043] Next, the powder containing amorphous silicon dioxide and / or amorphous silicate is mixed with an aqueous solution containing alkali metal ions to obtain a composition containing alkali metal silicate derived from at least a portion of the powder. The amorphous silicon dioxide and / or amorphous silicate reacts with the alkali metal ions to convert a portion of the powder into the alkali metal silicate, and the remainder remains as an abrasive.

[0044] Such powders are not particularly limited as long as they contain amorphous silicon dioxide and / or amorphous silicate, and include silicon dioxide-based compounds such as sinter, silicic stone, synthetic silica, and diatomaceous earth, silicates such as talc, zeolite, feldspar, bentonite, acid clay, activated clay, and other montmorillonite-containing clays, aluminosilicates such as montmorillonite, pumice, and volcanic ash, and one of these can be used alone or two or more can be used in combination. Among the above, it is preferable that the powder contains sinter. As described above, sinter has a particularly large content of amorphous silicic acid, and is preferably used in this embodiment.

[0045] The conversion (reaction) of the powder to an alkali metal silicate can be carried out, for example, by mixing these materials and then kneading and / or heating them, etc. The amount of the alkali metal silicate produced can be appropriately changed by changing the kneading time, heating time, temperature, etc.

[0046] (Second step) In this step, the composition obtained in the first step is mixed with a fatty acid alkali metal salt. Specifically, the composition is heated and stirred while the fatty acid alkali metal salt is added, and heating and stirring are continued until the mixture becomes uniform.

[0047] The temperature of the composition during heating is not particularly limited as long as the fatty acid alkali metal salt dissolves, and can be, for example, 60°C or higher and 95°C or lower.

[0048] (Third step) Finally, in this step, the obtained composition is mixed with an abrasive to obtain a household cleaning composition. Specifically, the composition obtained in the second step is stirred while the abrasive is added, and the stirring is continued until the composition becomes uniform. In this case, heating may be performed as necessary.

[0049] As described above, in the method for producing the household cleaner composition according to the present embodiment, a powder containing amorphous silicon dioxide and / or amorphous silicate is mixed with alkali metal ions to generate an alkali metal silicate. Therefore, it is not necessary to add an alkali metal silicate separately. In addition, since the generated alkali metal silicate is derived from the powder, it has a high affinity with the powder and improves the dispersibility of the powder.

[0050] [2.2. Second embodiment] The method for producing a household cleaning composition according to the second embodiment includes a step (first step) of mixing a fatty acid alkali metal salt with a powder containing amorphous silicon dioxide and / or amorphous silicate in a medium containing water while heating to produce an alkali metal silicate.

[0051] (First step) In this step, first, a fatty acid alkali metal salt and a powder containing amorphous silicon dioxide and / or amorphous silicate are mixed in a medium containing water to generate an alkali metal silicate. Specifically, for example, a fatty acid alkali metal salt is dissolved in water, and then the powder is added and stirred.

[0052] Thus, the present inventors have found that an alkali metal silicate can be produced simply by mixing a powder containing amorphous silicon dioxide and / or amorphous silicate with a fatty acid alkali metal salt, without adding an alkali compound such as an alkali metal hydroxide, which makes it possible to prevent an excessive amount of alkali metal from being added to the composition, and more reliably suppresses the effects of the household detergent composition on the skin during cleaning.

[0053] As in the first embodiment described above, in this step, a part of the powder becomes an alkali metal silicate, and the remainder remains as an abrasive.

[0054] More specifically, first, the fatty acid alkali metal salt is dissolved in water to obtain a solution. In this case, heating may be performed to promote dissolution of the fatty acid alkali metal salt. The temperature of the water (solution) during dissolution is not particularly limited as long as the fatty acid alkali metal salt is sufficiently dissolved, and may be, for example, 60°C or higher and 95°C or lower. The solution may be stirred during dissolution.

[0055] Next, the powder is added to the solution of the fatty acid alkali metal salt, and mixed while heating to generate an alkali metal silicate. As the powder, powder containing amorphous silicon dioxide and / or amorphous silicate described in the first embodiment above can be used, and silicate is particularly preferred.

[0056] The formation of the alkali metal silicate can be promoted by heating the mixture in a mixed state. The temperature of the mixture is not particularly limited and can be, for example, 40° C. to 80° C., preferably 45° C. to 70° C.

[0057] The mixing time is not particularly limited and is, for example, from 30 minutes to 600 minutes, preferably from 60 minutes to 300 minutes. Stirring may be carried out during mixing, if necessary.

[0058] (Second step) Finally, in this step, an abrasive is added to the mixture obtained to obtain a household cleaner composition. Specifically, the mixture obtained in the first step is stirred while the abrasive is added, and the mixture is stirred until it becomes uniform. In this case, heating may be performed as necessary. This step may be performed in parallel with the mixing of the fatty acid alkali metal salt and the powder in the first step. In this case, the production time can be shortened.

[0059] As described above, a household detergent composition can be produced by the method for producing a household detergent composition according to this embodiment. In this embodiment, an alkali metal silicate is produced by mixing a powder containing amorphous silicon dioxide and / or an amorphous silicate with a fatty acid alkali metal salt. Therefore, it is not necessary to add an alkali compound or an alkali metal silicate separately. In addition, since the produced alkali metal silicate is derived from the powder, it has a high affinity with the powder, improving the dispersibility of the powder.

[0060] The present invention has been described in detail above based on a preferred embodiment, but the present invention is not limited to this, and each component can be replaced with any component that can perform a similar function, or any component can be added. EXAMPLES

[0061] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0062] 1. Preparation of household cleaning composition (Example) 180L of water was added to the reactor, and 70kg of sodium soap mainly composed of sodium oleate was added in chip form and stirred. After confirming that the mixture in the reactor was homogenous, the mixture was heated to 90℃ to fully dissolve the sodium soap.

[0063] Next, 20 kg of siliceous powder was added to the solution while heating and stirring the solution to 52°C. Then, 250 kg of silica powder (silica) was added, and the solution was heated and stirred for another 3 hours. In this way, a paste-like household cleaner composition according to the present invention was obtained.

[0064] (Comparative Example) A portion (270 g) was taken from the solution in which the sodium soap of the Example was dissolved in water, and 270 g of silica powder (silica) was added to it. The mixture was thoroughly stirred, and after confirming that the silica powder was dispersed, a paste-like household cleaner composition of the Comparative Example was obtained.

[0065] 2. Evaluation The household detergent compositions according to the Examples and Comparative Examples were subjected to a cleaning test under the following conditions, and their cleaning properties were compared.

[0066] A glass plate having a haze as a stain was prepared, and an appropriate amount of the household cleaner composition according to the Examples and Comparative Examples was applied to the glass plate, rubbed with a finger, and then rinsed with tap water to remove the household cleaner composition from the glass plate.

[0067] Here, when the glass plate was rubbed with the household cleaning composition, the household cleaning composition according to the embodiment produced a smooth feeling and uniform foam. On the other hand, the household cleaning composition according to the comparative example produced a rough feeling when rubbed, suggesting that the abrasive was not sufficiently dispersed. Furthermore, compared with the embodiment, non-uniform foam was produced. The results are shown in FIG. 1.

[0068] During rinsing, the household cleaning composition according to the Comparative Example felt as if it remained on the glass plate, whereas the household cleaning composition according to the Example was easily and quickly removed from the glass plate.

[0069] Furthermore, the glass plate after rinsing with the household detergent composition according to the Example repelled water relatively uniformly, whereas the glass plate after rinsing with the household detergent composition according to the Comparative Example repelled water poorly. This shows that the household detergent composition according to the Example can clean uniformly and remove dirt reliably, compared to the Comparative Example.

Claims

1. The method includes a step of mixing a fatty acid alkali metal salt and a powder in a water-containing medium for 30 minutes to 600 minutes while heating the mixture to generate an alkali metal silicate derived from a portion of the powder, The powder is selected from the group consisting of silicon dioxide-based compounds, silicates, montmorillonite-containing clays, aluminosilicates, pumice, and volcanic ash, and includes at least one type containing amorphous silicon dioxide and / or amorphous silicate.

2. mixing the powder with an aqueous solution containing alkali metal ions to obtain a composition containing an alkali metal silicate derived from at least a portion of the powder; mixing the composition with a fatty acid alkali metal salt, The powder is selected from the group consisting of silicon dioxide-based compounds, silicates (excluding sodium silicate), montmorillonite-containing clay, aluminosilicates, pumice and volcanic ash, and contains one or more of amorphous silicon dioxide and / or amorphous silicate.

3. 3. The method for producing a household cleaning composition according to claim 1 or 2, wherein the powder is selected from the group consisting of sinter, silica, synthetic silica, diatomaceous earth, talc, zeolite, feldspar, bentonite, acid clay, activated clay, montmorillonite, pumice and volcanic ash, and contains one or more of amorphous silicon dioxide and / or amorphous silicate.

4. The method for producing a household cleaning composition according to claim 1 or 2, wherein the powder comprises silicate powder.

5. The method for producing a household cleaning composition according to claim 1, further comprising the step of adding and mixing an additional abrasive to the mixture of the fatty acid alkali metal salt and the powder.

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