Foaming cleaning agent composition and cleaning method

Abstract

To provide a foaming cleaner composition having excellent hard water resistance, cleaning ability, sterilization ability, foaming ability and rinsing ability.SOLUTION: A foaming cleaner composition has (A) a chlorine agent, and (B) an alkyl sulfate ester salt having a C6-10 alkyl group and / or an alkylene oxide adduct thereof (with an average number of moles of added alkylene oxide being 1-10), where the content of (A) is 0.1-10 wt.%.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a foaming cleaning agent composition and a cleaning method. [Background technology]

[0002] Conventionally, in food factories and the like, foaming cleaning has been used as a method for removing food stains such as proteins and oils and fats adhering to food processing machines, conveyor lines, floors, walls, and the like (hereinafter collectively referred to as food processing equipment). Foaming cleaning is a method for removing stains by foaming a cleaning composition and spraying it onto the object to be cleaned. By contacting the cleaning composition in a foam form, the contact time with the object to be cleaned is extended, and an improvement in the cleaning effect can be expected.

[0003] The cleaning composition used for foaming cleaning is required to have foaming power for spraying in foam form and good dischargeability for discharging to a desired location without scattering when sprayed. Since the cleaning composition used for such purposes has high foaming power, even if it is diluted with a large amount of water during rinsing, new bubbles are formed due to collision of water, etc., and there is a problem that rinsing is poor. For example, if bubbles accumulate near a drain, the upper part of the bubbles does not come into contact with the rinsing water, so the bubbles do not disappear forever, and extra rinsing water and time may be required. Therefore, a cleaning composition with good rinsing properties (good foam breaking properties during rinsing) is desired.

[0004] As such a detergent composition with good rinsing properties, for example, Patent Document 1 discloses a detergent composition containing (A) an oxidizing agent, (B) a fatty acid having a hydrocarbon group with 14 to 22 carbon atoms and / or a salt thereof, (C) an alkyldimethylamine oxide and / or an alkenyldimethylamine oxide having a hydrocarbon group with 14 to 22 carbon atoms, (D) at least one selected from an organic phosphonic acid or a salt thereof, and a condensed phosphoric acid or a salt thereof, and (E) water. Patent Document 2 discloses a cleaning composition containing (a) one or more compounds selected from oxidizing halogen acids and salts thereof, (b) an amine oxide surfactant having one hydrocarbon group having 8 to 14 carbon atoms, (c) one or more compounds selected from fatty acids having 12 to 14 carbon atoms and salts thereof, and (d) water. Patent Document 3 discloses a liquid detergent composition that contains (a) six specific amine oxides, (b) two specific fatty acids or salts thereof, (c) water, and (d) one or more compounds selected from oxidizing halogen acids and salts thereof, in which the ratio of the six amine oxides in (a) satisfies a specified condition, and the pH at 25°C is 13.3 or higher. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-108552 A [Patent Document 2] Patent No. 6013721 [Patent Document 3] JP 2015-151462 A Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, from the viewpoint of water and energy saving, there is a demand for excellent foaming and rinsing properties while maintaining cleaning and disinfecting properties. Furthermore, since water with high hardness is sometimes used for cleaning, there is a demand for detergent compositions to be resistant to hard water. However, the cleaning compositions described in Patent Documents 1 to 3 contain long-chain fatty acids with more than 12 carbon atoms, which react with hardness components derived from the dilution water or rinsing water to form insoluble soap scum, and thus have the problem of being unsuitable for hard water (low hard water resistance). For example, when the cleaning compositions described in Patent Documents 1 to 3 are used for cleaning in place (hereinafter also referred to as CIP), the formed soap scum can clog the piping of the cleaning target or the cleaning agent supply pipe. Furthermore, when a cleaning composition having poor resistance to hard water as disclosed in Patent Documents 1 to 3 is diluted with water having high hardness and used, there is a problem that the foaming ability decreases.

[0007] The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a foaming cleaner composition that is excellent in hard water resistance, cleaning properties, disinfecting properties, foaming properties and rinsing properties. [Means for solving the problem]

[0008] In order to achieve the above object, the foaming detergent composition of the present invention is characterized in that it contains (A) a chlorine agent, and (B) an alkyl sulfate having an alkyl group having 6 to 10 carbon atoms and / or an alkylene oxide adduct thereof (the average number of moles of alkylene oxide added is 1 to 10), and the content of (A) is 0.1 to 10% by weight. The above (A) is excellent in cleaning and disinfecting properties. On the other hand, the above (B) exhibits foaming properties at high concentrations, so that the detergent composition can be sprayed in a uniform foam form. Also, since it exhibits foam breaking properties at low concentrations, the foam is quickly defoamed during rinsing when it is diluted with rinsing water. This function allows both foaming properties and rinsing properties to be achieved. Therefore, in the foamable cleaning composition of the present invention, the foaming property (B) ensures a sufficient contact time between the foamable cleaning composition and the object to be cleaned, and it is believed that the cleaning and disinfecting properties (A) are fully exhibited. In addition, since it does not contain fatty acids and / or salts thereof having 14 or more carbon atoms, it has excellent hard water resistance.

[0009] The foaming cleaning agent composition of the present invention preferably further contains (C) at least one selected from the group consisting of organic phosphonic acids, condensed phosphoric acids, and salts thereof. When (C) at least one selected from the group consisting of organic phosphonic acid, condensed phosphoric acid, and salts thereof is contained, hard water resistance can be improved.

[0010] In the foaming cleaning composition of the present invention, the content of the above (C) is preferably 0.1 to 10% by weight. When the content of the above (C) is 0.1 to 10% by weight, the hard water resistance of the foaming detergent composition can be improved. If the content of (C) is less than 0.1% by weight, the improvement in hard water resistance may be insufficient, whereas if the content of (C) is more than 10% by weight, the appearance may become cloudy or precipitation may occur.

[0011] The foaming cleaning agent composition of the present invention preferably further contains (D) an alkali metal hydroxide, and has a pH of 9.0 or higher when diluted 100 times. When the foaming cleaning composition of the present invention contains an alkali metal hydroxide (D) and has a pH of 9.0 or higher when diluted 100 times, the foaming cleaning composition can exhibit sufficient cleaning properties even when used in a diluted form.

[0012] The foaming cleanser composition of the present invention further contains (E) a fatty acid having 6 to 12 carbon atoms or a salt thereof, and the content of (E) is preferably 0.1 to 6% by weight. When the foaming detergent composition contains (E) a fatty acid having 6 to 12 carbon atoms or a salt thereof and the content of (E) is 0.1 to 6% by weight, the foam breaking property is improved, and further, the transparency of the appearance of the foaming detergent composition can be improved.

[0013] In the foaming cleaning composition of the present invention, the content of the above (B) is preferably 1 to 20% by weight. When the content of the above (B) is 1 to 20% by weight, it becomes easy to achieve both foaming properties and foam breaking properties. If the content of (B) is less than 1% by weight, the foaming property may be insufficient, whereas if the content of (B) is more than 20% by weight, the ejection property and foaming property may decrease, or the appearance may become cloudy or precipitation may occur.

[0014] The cleaning method of the present invention is characterized in that the foamable cleaning agent composition of the present invention or a diluted solution thereof is foamed and brought into contact with an object to be cleaned. The foaming detergent composition of the present invention has excellent foaming properties, which can reduce the burden on workers involved in cleaning work and reduce the amount of detergent used. Furthermore, the foaming detergent composition of the present invention has excellent rinsing properties, which can reduce the amount of rinsing water used. In addition, the foaming detergent composition of the present invention has high hard water resistance, so that clogging of piping and detergent supply pipes is unlikely to occur even when hard water such as well water is used for dilution water or rinsing water. Effect of the Invention

[0015] The foaming detergent composition of the present invention is excellent in hard water resistance, cleaning properties, disinfecting properties, foaming properties and rinsing properties. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be described in detail below. However, the present invention is not limited to the following embodiments, and can be appropriately modified and applied within the scope of the present invention.

[0017] First, the foaming detergent composition of the present invention will be described. The foaming detergent composition of the present invention is characterized in that it contains (A) a chlorine agent and (B) an alkyl sulfate having an alkyl group having 6 to 10 carbon atoms and / or an alkylene oxide adduct thereof (the average number of moles of alkylene oxide added is 1 to 10), and the content of (A) is 0.1 to 10% by weight.

[0018] In the foaming cleaning agent composition of the present invention, (A) is a chlorine agent. Examples of the chlorine agent include chlorinated isocyanuric acid, trichloroisocyanuric acid, hypochlorous acid, chlorinated sodium isocyanurate, potassium chlorinated isocyanurate, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, sodium chlorite, potassium chlorite, and calcium chlorite. Of these, sodium hypochlorite and sodium chlorite are preferred. Two or more types of chlorine agents may be used in combination.

[0019] The content of (A) is 0.1 to 10% by weight, and preferably 3 to 6% by weight. If the content of (A) is less than 0.1% by weight, the cleaning and disinfecting properties may be insufficient, whereas if the content of (A) is more than 10% by weight, the stability of the chlorine agent (A) may be reduced.

[0020] In the foaming cleaning agent composition of the present invention, (B) is an alkyl sulfate having an alkyl group having 6 to 10 carbon atoms and / or an alkylene oxide (hereinafter abbreviated as AO) adduct thereof (the average number of moles of AO added is 1 to 10). The alkyl group having 6 to 10 carbon atoms may be a linear alkyl group or a branched alkyl group, but is preferably a branched alkyl group. 。 straight The chain alkyl group includes n-hexyl, n-heptyl, n-octyl, n-nonyl, and n-decyl. base etc. Examples of the branched alkyl group include a 2-ethylbutyl group, a 2-ethylhexyl group, and a 2-ethyloctyl group. Examples of the alkylene oxide (AO) include ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), and the like, and may be an addition of two or more kinds. The average number of moles of alkylene oxide added is preferably 1 to 5.

[0021] The foaming detergent composition of the present invention preferably does not contain an alkyl sulfate ester salt having an alkyl group having more than 12 carbon atoms and / or an AO adduct thereof.

[0022] In the foaming cleaning agent composition of the present invention, the content of (B) is not particularly limited, but is preferably 1 to 20% by weight, more preferably 1 to 10% by weight, and even more preferably 1 to 7% by weight. When the content of the above (B) is 1 to 20% by weight, it becomes easy to achieve both foaming properties and foam breaking properties. If the content of (B) is less than 1% by weight, the foaming property may be insufficient, whereas if the content of (B) is more than 20% by weight, the ejection property and foaming property may decrease, or the appearance may become cloudy or precipitation may occur.

[0023] The foaming cleaning agent composition of the present invention may contain components other than the above (A) and (B). Examples of components other than the above (A) and (B) include (C) at least one selected from the group consisting of organic phosphonic acids, condensed phosphoric acids, and salts thereof, (D) alkali metal hydroxides, (E) fatty acids having 6 to 12 carbon atoms or salts thereof, (F) surfactants, and (G) other components.

[0024] (C) is at least one member selected from the group consisting of organic phosphonic acids, condensed phosphoric acids, and salts thereof. Examples of organic phosphonic acids and salts thereof include 2-phosphonobutane-1,2,4-tricarboxylic acid and salts thereof, and 1-hydroxyethane-1,1-diphosphonic acid and salts thereof, with sodium 2-phosphonobutane-1,2,4-tricarboxylate and potassium 2-phosphonobutane-1,2,4-tricarboxylate being preferred. Examples of condensed phosphoric acid and salts thereof include sodium metaphosphate, sodium polyphosphate, and sodium pyrophosphate. When the foaming cleaning agent composition of the present invention contains (C), the hard water resistance can be improved.

[0025] In the foaming cleaning agent composition of the present invention, the content of (C) is not particularly limited, but it is preferably 0.1 to 10% by weight. If the content of (C) is less than 0.1% by weight, the hard water resistance may be insufficient, whereas if the content of (C) is more than 10% by weight, the appearance may become cloudy or precipitation may occur.

[0026] (D) is an alkali metal hydroxide. Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide.

[0027] In the foaming cleaning agent composition of the present invention, the content of the (D) alkali metal hydroxide is not particularly limited, but it is preferably a content such that the pH becomes 9.0 or higher when diluted 100 times. In order to satisfy the above conditions, for example, it is preferable to add 0.1 to 5% by weight of (D) when producing the foaming detergent composition.

[0028] (E) is a fatty acid having 6 to 12 carbon atoms or a salt thereof. Examples of fatty acids having 6 to 12 carbon atoms include caproic acid, caprylic acid, octylic acid, capric acid, and lauric acid. Examples of the fatty acid salts having 6 to 12 carbon atoms include sodium caproate, sodium caprylate, sodium octylate, sodium caprate, sodium laurate, potassium caproate, potassium caprylate, potassium octylate, potassium caprate, and potassium laurate. Two or more of the fatty acids having 6 to 12 carbon atoms or salts thereof may be used in combination. When the foaming cleaning agent composition of the present invention contains (E), the foam breaking properties can be improved.

[0029] In the foaming cleanser composition of the present invention, the content of (E) the fatty acid having 6 to 12 carbon atoms or a salt thereof is not particularly limited, but is preferably 0.1 to 6% by weight. If the content of (E) is less than 0.1% by weight, the appearance may become cloudy and sufficient foam breaking properties may not be obtained, whereas if the content of (E) is more than 6% by weight, foaming properties may decrease.

[0030] (F) is a surfactant, except for alkyl sulfate ester salts having an alkyl group with 6 to 10 carbon atoms and their AO adducts described as (B), and fatty acids having 6 to 12 carbon atoms and their salts described as (E). Surfactants include amphoteric surfactants and anionic surfactants. Examples of amphoteric surfactants include alkylamine oxides (octyldimethylamine oxide, lauryldimethylamine oxide, etc.). Examples of the anionic surfactant include alkanesulfonic acid and its salts, linear alkylbenzenesulfonic acid and its salts, and the like. The number of carbon atoms in the alkyl group constituting the alkylamine oxide is preferably less than 14. If the number of carbon atoms in the alkyl group constituting the alkylamine oxide is 14 or more, the foam breaking properties may be reduced.

[0031] In the foaming cleaning composition of the present invention, the content of (F) is not particularly limited, but it is preferably from 0.1 to 5% by weight.

[0032] The foaming cleaning agent composition of the present invention may contain (G) other component in addition to the above-mentioned (A), (B), (C), (D), (E) and (F). Other components include calcium salts, silicates, chelating agents, dispersants, stabilizers, and the like. Calcium salts and silicates can improve the foam breaking property and further suppress the corrosiveness to aluminum. Examples of calcium salts include calcium chloride, calcium chlorate, and calcium nitrate. Examples of silicates include sodium metasilicate and sodium orthosilicate. The chelating agent includes nitrilotriacetic acid and its salts. The dispersant may be sodium polyacrylate or the like. Examples of the stabilizer include aromatic sulfonates such as sodium meta-xylene sulfonate, potassium meta-xylene sulfonate, sodium paratoluene sulfonate, potassium paratoluene sulfonate, sodium cumene sulfonate, and potassium cumene sulfonate, and two or more of them may be used in combination.

[0033] The pH of the foaming cleaning composition of the present invention is not particularly limited, but the pH of a 100-fold diluted solution is preferably 9.0 or higher. From the viewpoint of improving chlorine stability, the pH is more preferably 10.0 or higher, and even more preferably 11.0 or higher. The above pH was measured at 25°C for a 100-fold diluted solution.

[0034] The foaming cleaning agent composition of the present invention is excellent in cleaning properties, disinfecting properties, foaming properties and rinsing properties, and is therefore suitable for foaming cleaning of kitchen equipment, food factories and the like. The foaming cleaning agent composition of the present invention may be used by spraying, for example, a solution obtained by diluting the original solution or a solution diluted 100 times onto an object to be cleaned in the form of foam using a foaming device such as a hand spray gun, a pressurized spray gun, a compressor type former, or a water pressure type (also called a water flow type) former. In addition, the foaming detergent composition of the present invention and its diluted solution have high hard water resistance and good rinsing properties, making them suitable for CIP in food production lines.

[0035] The cleaning method of the present invention is characterized in that the foamable cleaning agent composition of the present invention or a diluted solution thereof is foamed and brought into contact with an object to be cleaned. Since the foaming detergent composition of the present invention has excellent cleaning properties, disinfecting properties, foaming properties and rinsing properties, the amount of rinsing water used in the cleaning method of the present invention can be reduced. Furthermore, since the foaming detergent composition of the present invention has high resistance to hard water, clogging of pipes is unlikely to occur even when hard water such as well water is used for dilution or rinsing. The dilution ratio of the dilution solution is not particularly limited, but is preferably 100 times or less. EXAMPLES

[0036] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, parts means parts by weight and % means % by weight.

[0037] (Preparation of Foaming Cleaning Composition) Various raw materials were mixed according to the formulation shown in Table 1, and the remaining water was added so that the total amount became 100 parts, thereby obtaining foaming detergent compositions according to Examples 1 to 12 and Comparative Examples 1 to 4. The properties of the resulting foaming cleaning composition were evaluated by the following methods, and the results are shown in Table 1. The values ​​in the table indicate the purity of each raw material. The product names and manufacturers of each compound in the table are as follows: (A-1): "Meclon 12%" (sodium hypochlorite) manufactured by Osaka Soda Co., Ltd. (B-1): "Taipol 2H" (2-ethylhexanol sulfate sodium salt (alkyl group carbon number 8) manufactured by Taiko Yushi Kagaku Kogyo Co., Ltd. (B-2): Taiko Yushi Chemical Industry Co., Ltd., "Taipol BX-CONC" (butyl cellosolve sulfate sodium salt (number of carbon atoms of alkyl group) 4 )) (B-3): Taiko Yushi Kagaku Kogyo Co., Ltd., "Taipol 22HS" (2-ethylhexanol sulfate sodium salt EO 2 mole adduct (alkyl group carbon number 8)) (B-4): Sigma-Aldrich's "Sodium Octyl Sulfate" (linear sodium octyl sulfate (alkyl group carbon number: 8) (B-5): "Sodium Dodecyl Sulfate" (linear sodium decyl sulfate (alkyl group carbon number: 10)) manufactured by Tokyo Chemical Industry Co., Ltd. (B'-1): Shinorin 90TK-T (sodium lauryl sulfate (alkyl group carbon number: 12)) manufactured by Shin Nippon Rika Co., Ltd. (C-1): Chelesto Corporation, "Chilesto-PH430" (phosphonobutanetricarboxylic acid) (D-1): Asahi Glass Co., Ltd., "Liquid caustic potash (48%)" (48% potassium hydroxide aqueous solution) (E-1): "MCFA-8S" (caprylic acid (straight-chain fatty acid with 8 carbon atoms) manufactured by Miyoshi Oil Co., Ltd. (E-2): "Octyl acid" (octylic acid (branched fatty acid with 8 carbon atoms) manufactured by Kyowa Hakko Kogyo Co., Ltd.) (E-3): NOF Corp., "NAA-122" (lauric acid (straight-chain fatty acid with 12 carbon atoms)) (E'-1): NOF Corp., "NAA-142" (myristic acid (straight-chain fatty acid with 14 carbon atoms)) (F-1): Clariant Japan Co., Ltd., "GENAMINOX OC" (octyldimethylamine oxide) (F-2): "GENAMINOX K12" (lauryl dimethylamine oxide) manufactured by Clariant Japan Co., Ltd. (F-3): "HOSTAPUR SAS93" (secondary alkane sulfonate (alkane carbon number 14 to 17) manufactured by WeylChem Wiesbaden GmbH) (G-1): "Granular calcium chloride" (calcium chloride) manufactured by Tokuyama Corporation (G-2): "A potassium silicate" (No. 1 potassium silicate) manufactured by Nippon Chemical Industry Co., Ltd.

[0038] [Appearance evaluation (undiluted solution and 30-fold diluted solution)] The undiluted solution and the 30-fold diluted solution of each foaming cleaning composition were visually inspected to see whether there was any turbidity or precipitation in appearance.

[0039] [Hard water resistance evaluation] 3% by weight diluted solutions prepared with artificial hardness water of 300 ppm and 100 ppm (CaCl2:MgCl2 = 2:1, weight ratio) were stored at 45°C for 24 hours, and the appearance of the diluted solutions after storage was observed. ◎: When diluted with 100 ppm and 300 ppm artificial hardness water, neither precipitation nor turbidity occurred. ◯: When diluted with 100 ppm artificial hardness water, no precipitation or turbidity occurs, but when diluted with 300 ppm artificial hardness water, slight turbidity occurs. ×: When diluted with 100 ppm and 300 ppm artificial hardness water, precipitation and turbidity occurred in both cases.

[0040] [Cleaning evaluation] A 0.2 g portion of a composite soil (soybean oil: beef tallow: cake flour = 85:5:10) was applied to a stainless steel plate (6 cm x 6 cm) and left for 10 minutes to prepare a model soil. The stained stainless steel plate was immersed in a cleaning solution diluted to a specified concentration (3% by weight), and the degree of removal of the stain after immersion for 10 minutes was visually evaluated. The evaluation criteria were as follows: ○: Most of the dirt has been removed. ×: Only a small amount of dirt was removed.

[0041] [Bacteria elimination evaluation] The disinfection property was evaluated according to the following procedure. The bacterial strains used were Escherichia coli NBRC3972 and Staphylococcus aureus NBRC12732. Each strain was shake-cultured in nutrient bouillon medium at 35°C for 24 hours, and then incubated for 10 min. 7 ~10 9 A test bacteria solution of CFU / mL was prepared. Next, 30-fold and 300-fold dilutions of the foaming cleaning agent compositions prepared in each Example and Comparative Example were prepared. Next, 0.1 mL of the test bacteria solution was added to 10 mL of the 30-fold and 300-fold dilutions, respectively, and after mixing, the mixture was allowed to act at room temperature for 30 seconds. Then, one platinum loop of the mixture was transplanted into SCDLP medium, and after culturing at 35°C for 48 hours, the presence or absence of bacteria was judged. The evaluation criteria are as follows. In addition, if a 30-fold diluted solution has a disinfecting effect against both Escherichia coli and Staphylococcus aureus, it can be said that the foaming cleaning composition has sufficient disinfecting properties. ◎: Both the 30-fold and 300-fold diluted solutions have a disinfecting effect against both E. coli and Staphylococcus aureus. ○: The 30-fold diluted solution has a disinfecting effect against both E. coli and Staphylococcus aureus, but the 300-fold diluted solution has no disinfecting effect against E. coli and / or Staphylococcus aureus. ×: Neither the 30-fold diluted solution nor the 300-fold diluted solution had any disinfecting effect on Escherichia coli and / or Staphylococcus aureus.

[0042] [Evaluation of ejection and foaming properties] The test liquid was sprayed onto a vertically placed stainless steel plate using a compressor type foam sprayer. The evaluation criteria are as follows: ⊚: The liquid does not scatter when sprayed and is sprayed in a uniform foam form, so the discharge properties and foaming properties are good. ◯: The liquid splashes slightly when sprayed, but since it is sprayed in the form of foam, there is no problem with dischargeability or foaming properties. ×: The liquid splashes when sprayed, or even if it can be sprayed, it does not become foamy, so there is a problem with the dischargeability and / or foamability. Test conditions: Test solution concentration: 30 times diluted solution Foam sprayer Saniplan Former N (manufactured by Niitaka Co., Ltd.) Compressor air pressure 0.6MPa

[0043] [Rinsing (foam breaking) evaluation] A water jet foam sprayer was used to spray a 1m square area of ​​a Eucrete-coated floor surface for 15 seconds. After leaving it for 5 minutes, the foam was rinsed for 50 seconds, and the amount of foam remaining after 10 seconds was visually evaluated. The evaluation criteria are as follows. In addition, since the foaming cleaning agent composition of Comparative Example 2 could not be discharged in a foam form, the rinsing ability was not evaluated (indicated by [-] in Table 1). ⊚: No residual foam remains on the drain. ○: A small amount of residual foam remains on the drain. ×: Residual foam overflows from the drain. Test conditions: Foam sprayer Water flow type foamer (manufactured by Niitaka Co., Ltd.) By following the instruction manual and attaching the included green tip to the cleaning agent suction hose, the cleaning agent (undiluted) and tap water are mixed, and a 30-fold diluted solution is discharged in the form of foam. Test solution concentration Stock solution Water pressure 0.12MPa Discharge volume 7.5L / min

[0044] [Chlorine stability evaluation] To 1 g of the foaming cleaning agent composition prepared in each Example and Comparative Example, 50 mL of potassium iodide aqueous solution (concentration about 2% by weight) and 10 mL of acetic acid were added and thoroughly mixed to prepare a mixed solution. Next, the mixed solution was titrated with 0.1 M sodium thiosulfate aqueous solution, and the end point was the point at which the brown color disappeared and the solution became colorless. Based on the amount of sodium thiosulfate aqueous solution added at that time, the effective chlorine concentration was calculated by the following formula (1). Available chlorine concentration [%] = amount of sodium thiosulfate solution dropped [mL] × 0.3546 / amount of foaming cleaning agent composition [g] (1) The available chlorine concentration was measured by the above method immediately after preparation of the cleaning composition (0 days) and after 3 days had passed. The cleaning composition was stored in an incubator at 45°C for a specified number of days. The evaluation criteria were as follows. ○: Available chlorine concentration after 3 days is 50% or more. ×: The available chlorine concentration after 3 days is less than 50%.

[0045] [Table 1]

[0046] The results in Table 1 show that the foaming detergent composition of the present invention is excellent in hard water resistance, cleaning properties, disinfecting properties, foaming properties and rinsing properties. The results of Comparative Example 1 show that the inclusion of an alkyl sulfate salt having an alkyl group with 12 or more carbon atoms reduces hard water resistance and rinsing properties. The results of Comparative Example 2 show that the absence of (B) reduces discharge properties and foaming properties. The results of Comparative Example 3 show that the absence of (A) reduces cleaning properties and disinfecting properties. The results of Comparative Example 4 show that the inclusion of a fatty acid with 14 or more carbon atoms reduces hard water resistance. It was also confirmed that the addition of (C) improves hard water resistance, and that the chlorine stability is improved by increasing the pH to 10.0 or higher when diluted 100 times.

Claims

1. The composition contains (A) a chlorine agent, and (B) an alkyl sulfate having an alkyl group having 4 or 6 to 10 carbon atoms and / or an alkylene oxide adduct thereof (the alkylene oxide is at least one selected from the group consisting of ethylene oxide, propylene oxide, and butylene oxide, and the average number of moles of alkylene oxide added is 1 to 2), A liquid foaming detergent composition comprising (C) at least one selected from the group consisting of an organic phosphonic acid, a condensed phosphoric acid, and a salt thereof, and (D) an alkali metal hydroxide, The (A) is at least one selected from the group consisting of hypochlorous acid, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, sodium chlorite, potassium chlorite, and calcium chlorite; the content of (A) is 0.1 to 10% by weight, the content of (B) is 15% by weight or less, and the content of (C) is 8% by weight or less, based on 100% by weight of the liquid foaming cleaning agent composition; A liquid foaming cleaning agent composition having a pH of 9.0 or higher when diluted 100 times, and used in kitchen appliances and / or food processing equipment.

2. 2. The liquid foaming detergent composition according to claim 1, wherein the content of said (C) is 0.1 to 8% by weight based on 100% by weight of said liquid foaming detergent composition.

3. Further, (E) a fatty acid having 6 to 12 carbon atoms or a salt thereof, 3. The liquid foaming detergent composition according to claim 1, wherein the content of said (E) is 0.1 to 6% by weight based on 100% by weight of said liquid foaming detergent composition.

4. 4. The liquid foaming detergent composition according to claim 1, wherein the content of said (B) is 1 to 15% by weight based on 100% by weight of said liquid foaming detergent composition.

5. A cleaning method comprising forming the liquid foamable cleaning composition according to any one of claims 1 to 4 or a diluted solution thereof into foam and contacting the composition with an object to be cleaned.

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