Alkaline cleaning agent composition

Abstract

The objective is to provide an alkaline cleaning agent composition that possesses excellent cleaning power against stubborn oil stains, storage stability, and an effect of reducing evaporation to minimize choking during cleaning. [Solution] An alkaline cleaning agent composition is provided, comprising: (a) component: alkali metal hydroxide; (b) component: anionic surfactant; (c) component: hydroxycarboxylic acid chelating agent; (d) component: ethylene glycol solvent (excluding propylene oxide adducts); (e) component: sulfonic acid or a salt thereof in which only one position of the aromatic ring is substituted with an alkyl group; and (f) component: water, wherein the content of component (a) is 0.1 to 15% by mass, the content of component (b) is 0.1 to 10% by mass, the content of component (c) is 0.1 to 5% by mass, and the content of component (d) is 5 to 25% by mass, and the a / e ratio, which is the mass ratio of the content of component (a) to the content of component (e), is 0.1 to 4.5.

Description

Technical Field

[0001] The present invention relates to an alkaline cleaning agent composition.

Background Art

[0002] In kitchens and workplaces such as restaurants, hotels, dining halls, and food processing factories, there is a lot of stubborn deteriorated oil stain on ranges, griddles, ovens, ventilation fans, iron plates, etc., which is affected by the oxidation in the air. Various alkaline cleaning agents have been proposed so far. Oil stains are easily removed when the object to be cleaned (such as a pot, an iron plate, inside an oven, etc.) is cleaned while it is in a high-temperature state. Therefore, in the field, the object to be cleaned is often cleaned in a high-temperature state. However, when the object to be cleaned is at a high temperature, the cleaning agent is likely to evaporate, making the operator feel stuffy, and there is concern about the adverse effects on the human body. Recently, with the amendment of the Industrial Safety and Health Law, the awareness of reducing the adverse effects on the human body has been increasing, and improving the working environment during the use of cleaning agents has been emphasized.

[0003] Patent Documents 1 to 3 disclose a cleaning agent composition that combines an alkaline agent, a solvent, and a surfactant as a cleaning agent having high detergency against stubborn oil stains and good storage stability. Patent Document 4 discloses a cleaning agent composition that combines an alkaline agent and a polyhydric alcohol as a cleaning agent having high detergency and preventing the solidification of the cleaning agent by suppressing the evaporation amount during high-temperature cleaning.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0005] However, conventional detergent compositions such as those described in Patent Documents 1-4 have difficulty satisfying all requirements: cleaning power against stubborn oil stains, storage stability, and the effect of reducing choking during cleaning.

[0006] The main objective of the present invention is to provide an alkaline cleaning agent composition that possesses excellent cleaning power against stubborn oil stains, storage stability, and a choking-reducing effect during cleaning. [Means for solving the problem]

[0007] As a result of diligent research into the above-mentioned problems, the inventors discovered that by blending an appropriate proportion of hydrotrope with alkali metal hydroxide, a cleaning agent composition can be created that satisfies all requirements: cleaning power against stubborn oil stains, suppression of coughing by workers during cleaning, and storage stability, thus completing the invention.

[0008] In other words, the present invention includes the following embodiments. [1] An alkaline detergent composition comprising (a) component: alkali metal hydroxide, (b) component: anionic surfactant, (c) component: hydroxycarboxylic acid chelating agent, (d) component: ethylene glycol solvent (excluding propylene oxide adducts), (e) component: sulfonic acid or a salt thereof in which only one position of the aromatic ring is substituted with an alkyl group, and (f) component: water, The content of component (a) is 0.1 to 15% by mass, the content of component (b) is 0.1 to 10% by mass, the content of component (c) is 0.1 to 5% by mass, and the content of component (d) is 5 to 25% by mass, based on the total mass of the alkaline detergent composition. An alkaline detergent composition in which the a / e ratio, which is the mass ratio of the content of component (a) to the content of component (e), is 0.1 to 4.5. [2] The alkaline detergent composition according to [1], wherein the c / e ratio, which is the mass ratio of the content of component (c) to the content of component (e), is 0.1 to 2.0. [3] The alkaline cleaning agent composition according to [1] or [2], wherein component (e) comprises one or more selected from cumenesulfonic acid or a salt thereof, p-toluenesulfonic acid or a salt thereof. [Effects of the Invention]

[0009] The present invention provides an alkaline cleaning agent composition that possesses excellent cleaning power against stubborn oil stains, storage stability, and an effect of reducing evaporation to minimize choking during cleaning. [Modes for carrying out the invention]

[0010] The alkaline cleaning agent composition according to the embodiment contains the following components (a) to (f). The alkaline cleaning agent composition according to the embodiment may also contain any components other than components (a) to (f). (a) Components: Alkali metal hydroxide (b) Ingredients: Anionic surfactant (c) Ingredients: Hydroxycarboxylic acid chelating agent (d) Components: Ethylene glycol-based solvents (excluding propylene oxide adducts) (e) Components: Sulfonic acid or salt thereof in which only one position of the aromatic ring is substituted with an alkyl group. (f) Ingredients: Water

[0011] <(a) Components> The alkaline cleaning agent composition according to the embodiment contains an alkali metal hydroxide as component (a). Contains. (a) Component has the effect of saponifying deteriorated oils and fats and promoting their removal. When component (a) is incorporated into an alkaline cleaning agent composition, high cleaning power against stubborn oil stains is obtained.

[0012] Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide. The alkali metal hydroxide may be used alone or in combination of two or more. Since it is easy to obtain detergency, sodium hydroxide and potassium hydroxide are preferable as the alkali metal hydroxide.

[0013] The content of component (a) in the alkaline cleaning composition is 0.1 to 15% by mass, preferably 4.5 to 10% by mass, based on the total mass of the alkaline cleaning composition. When the content of component (a) is not less than the lower limit value, high detergency against oil stains can be obtained. When the content of component (a) is not more than the upper limit value, the evaporation amount during cleaning can be suppressed to suppress the choking of the operator, and the storage stability of the undiluted solution and diluted solution of the cleaning composition is also improved. When two or more alkali metal hydroxides are used as component (a), the total content thereof is taken as the content of component (a). The alkali metal hydroxide is indicated as "a drug for external use other than medicine" under the Poison and Narcotics Control Law and requires specialized knowledge and handling. Therefore, in order to avoid the Poison and Narcotics Control Law, the content of each alkali metal hydroxide is preferably less than 5.0% by mass.

[0014] The alkaline cleaning composition becomes alkaline by containing component (a). The pH of the alkaline cleaning composition is preferably 12.0 or more.

[0015] <(b) component> Component (b) is an anionic surfactant. By blending component (b) in the alkaline cleaning composition, it is easy to foam and also easy to disperse oil stains, and the detergency is enhanced.

[0016] Examples of anionic surfactants include, for example, linear or branched alkyl (C8-C22) benzene sulfonates, long-chain alkyl (C8-C22) sulfonates, long-chain olefin (C8-C22) sulfonates, long-chain alkyl (C8-C22) sulfate esters, polyoxyethylene (p = 1-6) alkyl (C8-C22) ether sulfate esters, polyoxyethylene (p = 1-10) alkyl (C8-C18) phenyl ether sulfate esters, alkyl (C8-C22) diphenyl ether disulfonates, saturated fatty acid salts having 10 to 24 carbon atoms, unsaturated fatty acid salts having 10 to 24 carbon atoms, polyoxyethylene fatty acid amide ether sulfates, alkane sulfonates, sulfosuccinic acid type surfactants, amide carboxylic acid type surfactants, alkyl ether carboxylates, α-sulfomethyl ester salts, and alkyl succinates. However, “C8-C22” in parentheses means that the number of carbon atoms constituting the carbon chain is 8 to 22, and the same applies to other descriptions. Also, p means the number of added moles of ethylene oxide. These anionic surfactants may be used alone or in combination of two or more.

[0017] Since it is easy to reduce the choking of workers during cleaning, as the anionic surfactant, sodium α-olefin sulfonate, sodium polyoxyethylene alkyl ether sulfate, and sodium alkane sulfonate are preferred.

[0018] The content of component (b) in the alkaline cleaning agent composition is 0.1 to 10% by mass, preferably 1 to 4% by mass, based on the total mass of the alkaline cleaning agent composition. If the content of component (b) is at least the lower limit value, sufficient cleaning performance and foam persistence can be obtained. If the content of component (b) is at most the upper limit value, the defoaming is improved and the working efficiency is enhanced. When two or more anionic surfactants are used as component (b), the total content thereof is taken as the content of component (b).

[0019] <(c) component> Component (c) is a hydroxycarboxylic acid-based chelating agent. By incorporating component (c) into the alkaline detergent composition, the storage stability of the alkaline detergent composition when diluted is improved, the hardness component is more easily captured, and the cleaning power is enhanced.

[0020] Examples of hydroxycarboxylic acid chelating agents include hydroxycarboxylic acids such as malic acid, citric acid, gluconic acid, lactic acid, tartaric acid, and heptonic acid, or salts thereof. Examples of salts in the above chelating agents include salts of alkali metals such as potassium and sodium, and salts of alkaline earth metals such as magnesium and calcium. Alkali metal salts are preferred, and sodium salts or potassium salts are more preferred. These hydroxycarboxylic acid chelating agents may be used individually or in combination of two or more.

[0021] Due to their excellent metal ion sequestering performance, sodium gluconate, sodium citrate, and sodium malate are preferred as hydroxycarboxylic acid chelating agents, with sodium gluconate being more preferred. It is presumed that the metal ion sequestering performance improves as the number of hydroxyl groups and carboxyl groups per molecule of the hydroxycarboxylic acid chelating agent increases.

[0022] The content of component (c) in the alkaline cleaning agent composition is 0.1 to 5% by mass, preferably 1 to 3% by mass, relative to the total mass of the alkaline cleaning agent composition. If the content of component (c) is above the lower limit, storage stability and cleaning performance are improved. If the content of component (c) is below the upper limit, coughing by the worker during cleaning can be reduced. When two or more alkaline cleaning agent compositions are used as component (c), their total content shall be considered as the content of component (c).

[0023] <(d) component> (d) Component is an ethylene glycol-based solvent (excluding propylene oxide adducts). The cleaning power is improved by incorporating component (d) into the alkaline cleaning agent composition.

[0024] Examples of ethylene glycol-based solvents include ethylene glycol ether and diethylene glycol ether. Examples of ethylene glycol ethers include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, ethylene glycol dimethyl ether, ethylene glycol monophenyl ether, ethylene glycol monobenzyl ether, ethylene glycol monoisopropyl ether, and ethylene glycol monoisobutyl ether. Examples of diethylene glycol ethers include diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol diethyl ether, and diethylene glycol monobenzyl ether. These ethylene glycol-based solvents may be used individually or in combination of two or more types.

[0025] Diethylene glycol monobutyl ether and ethylene glycol monoisobutyl ether are preferred as ethylene glycol-based solvents because they offer superior cleaning power and are less likely to cause coughing or choking during cleaning.

[0026] The content of component (d) in the alkaline cleaning agent composition is 5 to 25% by mass, preferably 15 to 20% by mass. If the content of component (d) is above the lower limit, sufficient cleaning power can be obtained. If the content of component (d) is below the upper limit, the storage stability of the undiluted alkaline cleaning agent composition is excellent, and turbidity and separation are less likely to occur. When two or more ethylene glycol-based solvents are used as component (d), their total content shall be considered as the content of component (d).

[0027] <(e) component> (e) Component is a sulfonic acid or a salt thereof in which only one position of the aromatic ring is substituted with an alkyl group. By incorporating component (e) into the alkaline cleaning agent composition, the amount of evaporation of the alkaline cleaning agent composition during cleaning is reduced, which can suppress choking by workers, and also improves the storage stability of the alkaline cleaning agent composition.

[0028] Examples of aromatic rings for component (e) include benzene rings, naphthalene rings, phenanthrene rings, anthracene rings, fluorene rings, tetracene rings, and pyrene rings. A benzene ring is more preferable as the aromatic ring for component (e) because it is less likely to cause coughing in workers.

[0029] (e) The alkyl group substituted on the aromatic ring of component (e) may be a linear alkyl group or a branched alkyl group. (e) The number of carbon atoms in the alkyl group substituted on the aromatic ring of component (e) is preferably 1 to 5, and more preferably 1 to 3. Examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, and pentyl groups. Since they are less likely to cause coughing in workers, methyl, ethyl, n-propyl, and isopropyl groups are preferred as alkyl groups for component (e), and methyl and isopropyl groups are more preferred.

[0030] (e) Specific examples of components include, for example, cumenesulfonic acid or its salts, and p-toluenesulfonic acid or its salts. As salts, alkali metal salts are preferred, and sodium salts or potassium salts are more preferred. These sulfonates may be used individually or in combination of two or more. Since it is easy to suppress coughing in workers, component (e) is preferably one or more selected from cumenesulfonic acid or its salts, p-toluenesulfonic acid or its salts, and p-ethylbenzenesulfonic acid or its salts, with cumenesulfonate being more preferred.

[0031] The content of component (e) in the alkaline cleaning agent composition is preferably 1 to 10% by mass, and more preferably 2 to 5% by mass. If the content of component (e) is above the lower limit, the amount of evaporation of the alkaline cleaning agent composition during cleaning is reduced, making it easier to suppress coughing by the worker. If the content of component (e) is below the upper limit, excellent storage stability is achieved. When two or more compounds are used as component (e), their total content shall be considered as the content of component (e).

[0032] The content of component (e) in the alkaline cleaning agent composition is adjusted so that the a / e ratio, which is the mass ratio of the content of component (a) to the content of component (e), is between 0.1 and 4.5. If the a / e ratio is above the lower limit, the cleaning power is excellent. If the a / e ratio is below the upper limit, the amount of evaporation of the alkaline cleaning agent composition during cleaning is reduced, which reduces coughing for the worker, and the storage stability of the alkaline cleaning agent composition is excellent. A preferred a / e ratio is 0.5 to 2.0 because it offers an excellent balance of cleaning power, suppression of choking for workers, and storage stability.

[0033] The b / e ratio, which is the mass ratio of the content of component (b) to the content of component (e) in the alkaline cleaning agent composition, is preferably 0.1 to 3.0, and more preferably 0.1 to 1.5. If the b / e ratio is above the lower limit, foaming during washing is good and the cleaning power is excellent. If the b / e ratio is below the upper limit, the amount of evaporation of the alkaline cleaning agent composition during washing is reduced, and the effect of suppressing coughing by the worker is further enhanced.

[0034] The c / e ratio, which is the mass ratio of the content of component (c) to the content of component (e) in the alkaline cleaning agent composition, is preferably 0.1 to 2.0, and more preferably 0.1 to 1.0. If the b / e ratio is above the lower limit, the storage stability of the alkaline cleaning agent composition is improved. If the b / e ratio is below the upper limit, the amount of evaporation of the alkaline cleaning agent composition during cleaning is reduced, and the effect of suppressing coughing by workers is further enhanced.

[0035] <Optional ingredients> Optional ingredients include, for example, nonionic surfactants, amphoteric surfactants, polymers, disinfectants, preservatives, dyes, and fragrances. These optional ingredients may be used individually or in combination of two or more.

[0036] The pH of the alkaline cleaning agent composition is preferably 12 to 14. In this specification, the pH of the alkaline cleaning agent composition is the value measured by a pH meter (Horiba, Ltd., product name "D-210P") after adjusting the temperature of the sample to 25°C.

[0037] <Manufacturing method> The method for producing the alkaline detergent composition is not particularly limited. For example, it can be produced by mixing components (a) to (f) and optionally any other components using conventionally known methods.

[0038] <Application> The uses of the alkaline cleaning agent composition according to this embodiment are not particularly limited, but it is suitable for cleaning oil stains from ranges, griddles, ovens, ventilation fans, griddles, etc. in kitchens and work areas. [Examples]

[0039] The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following description.

[0040] [Raw materials used] The raw materials used in this example are listed below. (a) component a-1: Sodium hydroxide (48% liquid caustic soda, manufactured by Toagosei Co., Ltd.) a-2: Potassium hydroxide (48% liquid potassium hydroxide, manufactured by Toagosei Co., Ltd.)

[0041] ((b) component) • b-1: Sodium α-olefin sulfonate (AOS) (Liporan LB-440, manufactured by Lion Specialty Chemicals Co., Ltd.) b-2: Sodium polyoxyethylene alkyl ether sulfate (AES(3EO)) (Sinoline SPE-1350, manufactured by Shin Nippon Rika Co., Ltd.) b-3: Sodium secondary alkanesulfonate (Hostapur SAS 30A, manufactured by Clariant Co., Ltd.)

[0042] ((c) component) • c-1: Sodium gluconate (manufactured by Jungbunzlauer Suisse AG) • c-2: Sodium citrate (purified sodium citrate, manufactured by Fuso Chemical Industries, Ltd.) • c-3: Sodium malate (manufactured by Fuso Chemical Industries, Ltd.)

[0043] ((c') component: comparison target) · c'-4: Sodium nitrilotriacetate (NTA) (LH-700, manufactured by Kirest Co., Ltd.)

[0044] ((d) component) • d-1: Diethylene glycol monobutyl ether (butyl carbitol, manufactured by Nippon Emulsifier Co., Ltd.) d-2: Ethylene glycol monoisobutyl ether (isobutyl glycol, manufactured by Nippon Emulsifier Co., Ltd.)

[0045] ((e) component) e-1: Sodium cumenesulfonate (Teikatox N5040, manufactured by Teika Co., Ltd.) e-2: p-Sodium toluenesulfonate (Toluene Sodium Sodium Sulfonate, manufactured by Kuantum Corp. Co., Ltd.)

[0046] ((e') component: comparison target) e'-1: Sodium metaxylenesulfonate (SXS-Y, manufactured by Itochu Chemical Frontier Co., Ltd.)

[0047] [Examples 1-16] Alkaline detergent compositions were prepared by dissolving components (a) to (e) in water (f) to obtain the composition shown in Table 1. The values ​​in Table 1 are shown as the (pure amount) of each component, with the active ingredient amount set at 100% by mass.

[0048] [Comparative Examples 1-11] Alkaline detergent compositions were prepared by dissolving components (a) to (e), component (c'), and component (e') in water (component (f)) to obtain the composition shown in Table 2. The values ​​in Table 2 are shown as the (pure amount) of each component, with the active ingredient amount set at 100% by mass.

[0049] [Evaluation Method] (1) Amount of evaporation during washing For each prepared alkaline liquid detergent composition, the amount of evaporation was measured when heated at 120-180°C for 5 minutes using an infrared moisture meter (Kett Scientific Instruments, FD-660), and a calibration curve was created. The amount of evaporation was determined as the ratio of the mass of evaporation to the total mass of the alkaline detergent composition before heating. Using the above calibration curve, the amount of evaporation at 230°C was calculated and judged according to the following criteria. A higher amount of evaporation indicates a greater likelihood of coughing, and a score of ○ or higher was considered acceptable. <Judgment criteria> ◎: Evaporation rate less than 65% ○: Evaporation rate is less than 65-70% △: Evaporation rate less than 70-75% ×: Evaporation rate is 75% or more

[0050] (2) Liquid stability of the undiluted solution 100 mL of each prepared alkaline liquid detergent composition and a stirrer were placed in a beaker and heated while stirring in a water bath. The state of the liquid was observed visually, and the temperature at which it became cloudy was measured and judged according to the following criteria. A score of ○ or higher was considered acceptable. <Judgment criteria> ◎: Turns cloudy at temperatures above 55℃ ○: Cloudy at temperatures below 50-55℃ △: Cloudy at temperatures below 45-50℃ ×: Cloudy below 45℃

[0051] (3) Solution stability of the diluted solution Stock solutions were prepared by dissolving 59.0 g of calcium chloride dihydrate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and 27.2 g of magnesium chloride hexahydrate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) in 1 L of deionized water. 0.94 mL, 1.87 mL, and 2.81 mL of the resulting stock solutions were each diluted to 1 L with deionized water to prepare hardness water with concentrations of 50 ppm, 100 ppm, and 150 ppm. Five mL of each prepared alkaline liquid detergent composition was placed in a beaker, and 50 ppm hard water was added and stirred with a stirrer to prepare a 20-fold diluted solution. Similarly, diluted solutions were prepared by diluting with 100 ppm hard water and 150 ppm hard water. After storing each of the obtained diluted solutions at 25°C for one week, the condition of the liquid was observed visually and judged according to the following criteria. A score of ○ or higher was considered acceptable. <Judgment criteria> ◎: Precipitation occurs in 150 ppm hard water, but there is no cloudiness. ○: No turbidity or precipitation occurs at 100 ppm hard water, but turbidity and precipitation occur at 150 ppm. △: No turbidity or precipitation occurs at 50 ppm hard water, but turbidity and precipitation occur at 100 ppm. ×: Turns cloudy and precipitates in hard water at 50 ppm.

[0052] (4) Cleaning power against modified oil stains Salad oil (Nissin Salad Oil) was heated at 130°C for 2 hours, then carbon black (Mitsubishi Chemical MA100) was mixed in to a concentration of 0.4% by mass. 2g of this mixture was applied to a 250mm x 250mm stainless steel plate and treated at 150°C for 30 minutes to create a stained plate. 0.5g / cm³ of alkaline liquid cleaning agent composition was then added to this plate. 2 The product was applied, rinsed thoroughly with water, and the degree of dirt removal was visually checked and judged according to the following criteria. A score of ○ or higher was considered acceptable. <Judgment criteria> ◎: Excellent stain removal ○: Good at removing stains △: Uneven stain removal ×: Does not remove dirt very well

[0053] The compositions of the examples and comparative examples, along with their respective evaluation results, are shown in Tables 1 and 2.

[0054] [Table 1]

[0055] [Table 2]

[0056] As shown in Table 1, the alkaline detergent compositions of Examples 1 to 16, which contain components (a) to (f) in appropriate ratios, are considered to have excellent storage stability, high cleaning power, low evaporation rate, and can also suppress choking. On the other hand, the alkaline detergent compositions of Comparative Examples 1 to 11, which did not adequately contain components (a) to (f), lacked storage stability, cleaning power, and choking suppression effects.

Claims

1. An alkaline cleaning agent composition comprising: (a) component: alkali metal hydroxide; (b) component: anionic surfactant; (c) component: hydroxycarboxylic acid chelating agent; (d) component: ethylene glycol solvent (excluding propylene oxide adducts); (e) component: sulfonic acid or a salt thereof in which only one position of the aromatic ring is substituted with an alkyl group; and (f) component: water. The content of component (a) is 0.1 to 15% by mass, the content of component (b) is 0.1 to 10% by mass, the content of component (c) is 0.1 to 5% by mass, and the content of component (d) is 5 to 25% by mass, based on the total mass of the alkaline detergent composition. An alkaline detergent composition in which the a / e ratio, which is the mass ratio of the content of component (a) to the content of component (e), is 0.1 to 4.

5.

2. The alkaline cleaning agent composition according to claim 1, wherein the c / e ratio, which is the mass ratio of the content of component (c) to the content of component (e), is 0.1 to 2.

0.

3. The alkaline cleaning agent composition according to claim 1 or 2, wherein component (e) comprises one or more selected from cumenesulfonic acid or a salt thereof, or p-toluenesulfonic acid or a salt thereof.

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