Detergent composition and method for using the detergent

Abstract

The present invention provides a detergent composition that can clean at a temperature lower than conventional cleaning temperatures (70 to 80°C) and has a high cleaning effect. [Solution] The cleaning agent composition disclosed herein contains: component A: 0.1 to 6 mass% of an alkali metal hydroxide; component B: 0.1 to 5 mass% of an alkali metal hypochlorite; component C: 0.1 to 10 mass% of a silicate; component D: 0.01 to 1.0 mass% of a nonionic surfactant; component E: 0.1 to 10 mass% of a solubilizing agent; component F: 0.5 to 7 mass% of a polymeric dispersant or phosphonate; and water.

Description

[Technical field]

[0001] The present disclosure relates to a cleaning agent composition that can be used for CIP cleaning of production facilities such as food factories. [Background technology]

[0002] Conventionally, in order to clean manufacturing equipment such as tanks, sterilizers, and filling machines in food factories that produce dairy products and beverages, CIP cleaning is often used, in which a diluted solution of alkaline detergent or acid detergent is heated to a high temperature of 70 to 80°C and circulated. Recently, from the viewpoints of reducing fuel costs, increasing environmental awareness, and improving safety during cleaning work, there is a demand for the establishment of a cleaning method that can be performed at a lower temperature.

[0003] An example of a cleaning agent with a high cleaning effect is an alkaline detergent containing an oxidizing agent such as sodium hypochlorite. However, alkaline detergents that do not contain surfactants have insufficient cleaning properties when the cleaning temperature is lowered to about 40 to 50°C (i.e., at a lower temperature than before). In addition, because sodium hypochlorite is a strong oxidizing agent, its stability tends to decrease significantly depending on the type of surfactant used.

[0004] Patent Documents 1 and 2 disclose a detergent composition that contains sodium hypochlorite and a low-foaming amphoteric surfactant. However, the detergent has poor cleaning ability against heavy stains such as milk fat found in dairy factories. Patent Document 3 discloses a technology that uses hydrogen peroxide in combination with an alkaline detergent containing a decomposition catalyst to perform cleaning at a lower temperature. However, this technology requires the use of two agents, which makes the cleaning process complicated.

[0005] As described above, there is a demand for a cleaning material for cleaning manufacturing equipment in food factories and the like, which has an excellent cleaning effect even when cleaning is performed at a temperature lower than conventional cleaning temperatures. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5292140 [Patent Document 2] Patent Publication No. 2022-000485 [Patent Document 3] Patent No. 5893831 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above circumstances, an object of the present disclosure is to provide a cleaning composition that has a high cleaning effect even at a temperature lower than 70 to 80° C. (conventional cleaning temperatures). [Means for solving the problem]

[0008] In order to solve the above problems, the present inventors have been working on the development of a cleaning agent that has excellent cleaning properties and low foaming properties at temperatures lower than conventional cleaning temperatures (70 to 80° C.), for example, at temperatures of 40 to 50° C. As a result of intensive investigation, they have found that the problems can be solved by creating a cleaning agent with the following composition and blending ratio, and have completed the present invention.

[0009] The present disclosure includes the following aspects. [1] Component A: 0.5 to 6 mass% of an alkali metal hydroxide, Component B: 0.1 to 5 mass% of an alkali metal hypochlorite, Component C: 0.1 to 10 mass% silicate, Component D: 0.01 to 1.0 mass% of a nonionic surfactant, Component E: 0.1 to 10% by mass of a solubilizer, Component F: 0.5 to 7 mass% of a polymer dispersant or a phosphonate; Water, Cleaning composition. [2] Component A: 0.5 to 6 mass% of an alkali metal hydroxide, Component B: 0.1 to 5 mass% of an alkali metal hypochlorite, Component C: 0.1 to 10 mass% silicate, Component D: 0.01 to 1.0 mass% of a nonionic surfactant, Component E: 0.1 to 10% by mass of a solubilizer, Component F: 0.5 to 7 mass% of a polymer dispersant or a phosphonate; Consisting only of water, Cleaning composition. [3] The component E comprises an alkali metal salt of a fatty acid or an alkali metal salt of an aromatic sulfonic acid. The cleaning composition according to the above [1] or [2]. [4] The component A is caustic soda or caustic potassium, The component B is sodium hypochlorite, The component C is potassium silicate, The component D is a polyoxyalkylene ether, The component E is sodium 2-ethylhexanoate, potassium 2-ethylhexanoate, or sodium m-xylene sulfonate; The component F is a polyacrylate or sodium 2-phosphono-1,2,4,butanetricarboxylate; The cleaning composition according to any one of the above [1] to [3]. [5] The cleaning composition according to any one of the above [1] to [4] is diluted with water to a concentration of 0.1 to 50 mass %. Cleaning composition. [6] The cleaning composition according to the above item [5] is heated to 20 to 60°C and then used. How to use the cleaning agent. [7] Component A: 0.5 to 6 parts by mass of an alkali metal hydroxide, Component B: 0.1 to 5 parts by mass of an alkali metal hypochlorite, Component C: 0.1 to 10 parts by mass of silicate, Component D: 0.01 to 1.0 parts by mass of a nonionic surfactant, Component E: 0.1 to 10 parts by mass of a solubilizer, Component F: 0.5 to 7 parts by mass of a polymer dispersant or a phosphonate, Water, The component A is 6% by mass or less of the total amount. Cleaning composition. Effect of the Invention

[0010] According to the present disclosure, it is possible to provide a cleaning composition that has a high cleaning effect even at a temperature lower than 70 to 80° C. (conventional cleaning temperatures). [Brief description of the drawings]

[0011] [Figure 1] 1 is a table showing the compounding ratios (mass%) and test results of Examples 1 to 6. [Diagram 2] 1 is a table showing the compounding ratios (% by mass) and test results of Examples 7 to 11. [Diagram 3] 1 is a table showing the compounding ratios (mass%) and test results of Comparative Examples 1-6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following embodiment.

[0013] In this specification, "CIP (Cleaning in Place)" refers to cleaning in place. Cleaning in place is a method of cleaning equipment in nearly the same condition as when it was in operation, without disassembling or moving the equipment. The term "food" is a general term for food and drink that people consume on a daily basis.

[0014] [Cleaning agent composition] The present disclosure discloses a cleaning agent composition suitable for CIP cleaning. The cleaning agent composition contains six components, components A to F, and water. Component A is an alkali metal hydroxide, component B is an alkali metal hypochlorite, component C is a silicate, component D is a nonionic surfactant, component E is a solubilizer, and component F is a polymer dispersant or a phosphonate.

[0015] The cleaning agent composition of the present disclosure preferably contains the following blending ratios: Component A: 0.5 to 6 parts by mass of an alkali metal hydroxide, Component B: 0.1 to 5 parts by mass of an alkali metal hypochlorite, Component C: 0.1 to 10 parts by mass of a silicate, Component D: 0.01 to 1.0 part by mass of a nonionic surfactant, Component E: 0.1 to 10 parts by mass of a solubilizing agent, and Component F: 0.5 to 7 parts by mass of a polymeric dispersant or a phosphonate.

[0016] For example, the cleaning composition of the present disclosure may be a cleaning composition containing: Component A: 0.5 to 6 mass% of an alkali metal hydroxide; Component B: 0.1 to 5 mass% of an alkali metal hypochlorite; Component C: 0.1 to 10 mass% of a silicate; Component D: 0.01 to 1.0 mass% of a nonionic surfactant; Component E: 0.1 to 10 mass% of a solubilizing agent; Component F: 0.5 to 7 mass% of a polymeric dispersant or phosphonate; and water.

[0017] Details of each component are as follows: [Component A] Component A is an alkali metal hydroxide. Examples of alkali metal hydroxides include caustic soda (sodium hydroxide) and caustic potassium (potassium hydroxide).

[0018] The content of component A: an alkali metal hydroxide is preferably 0.5 to 6 mass%, more preferably 1 to 5 mass%, and particularly preferably 2 to 4 mass%. When it is 0.5 mass% or more, the cleaning property is improved. When it is 6 mass% or less, the stability of the alkali metal hypochlorite salt, which is component B, is improved, and the corrosiveness to stainless steel can be suppressed. The content of component A is preferably 6 mass % or less of the total amount of the cleaning composition.

[0019] [Component B] Component B is an alkali metal hypochlorite. Examples of the alkali metal hypochlorite include sodium hypochlorite and potassium hypochlorite.

[0020] The content of component B (alkali metal hypochlorite) is preferably 0.1 to 5 mass%, more preferably 1 to 4 mass%, and particularly preferably 2 to 3 mass%. When it is 0.1 mass% or more, cleaning properties are improved. When it is 5 mass% or less, corrosiveness to stainless steel can be suppressed.

[0021] [Component C] Component C is a silicate. Examples of the silicate include potassium silicate and sodium silicate.

[0022] The content of component C: silicate is preferably 0.1 to 10 mass%, more preferably 0.5 to 8 mass%, and particularly preferably 1 to 4 mass%. If it is 0.1 mass% or more, corrosiveness to stainless steel can be suppressed. If it is 10 mass% or less, the occurrence of precipitation during low-temperature storage can be suppressed.

[0023] [Component D] Component D is a surfactant. The surfactant is preferably a nonionic surfactant. The nonionic surfactant is not particularly limited, but may be polyoxyalkylene ether, polyoxyethylene alkyl ether, polyoxyalkylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyalkylene alkylphenyl ether, nonylphenoxy EO / PO polyalkylene glycol ethyl acetal, Pluronic block polymer, reverse Pluronic block polymer, sucrose fatty acid ester, sorbitan fatty acid ester, polyethylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polypropylene glycol fatty acid ester, or other fatty acid ester. These nonionic surfactants may be used alone or in combination of two or more.

[0024] The content of component D: nonionic surfactant is preferably 0.01 to 1.0 mass%, more preferably 0.05 to 0.8 mass%, and particularly preferably 0.1 to 0.5 mass%. When it is 0.01 mass% or more, the cleaning property is improved. When it is 1.0 mass% or less, the stability of the alkali metal hypochlorite, which is component B, is improved.

[0025] [Component E] Component E is a solubilizer. The solubilizer is not particularly limited as long as it can be used in food factories. It may be an alkali metal salt of a fatty acid or an alkali metal salt of an aromatic sulfonic acid. For example, it may be sodium 2-ethylhexanoate, potassium 2-ethylhexanoate, or sodium m-xylene sulfonate.

[0026] The content of component E (solubilizer) is preferably 0.1 to 10 mass%, more preferably 0.5 to 8 mass%, and particularly preferably 1 to 5 mass%. When it is 0.1 mass% or more, the liquid stability of the composition is improved. When it is 10 mass% or less, the stability of the alkali metal hypochlorite (component B) is increased.

[0027] [Component F] Component F is a polymer dispersant or a phosphonate. Examples of the polymer dispersant include polyacrylic acid or an alkali metal salt thereof, a copolymer of acrylic acid and maleic acid or an alkali metal salt thereof, a copolymer of styrenesulfonic acid and maleic acid or an alkali metal salt thereof, and a copolymer of styrenesulfonic acid and acrylic acid or an alkali metal salt thereof. Examples of the phosphonate include 2-phosphono-butane-tricarboxylic acid or an alkali metal salt thereof, 1-hydroxyethylidene-1,1-diphosphonic acid or an alkali metal salt thereof, and pentasodium aminotri(methylenephosphonate) or an alkali metal salt thereof. Among these, sodium polyacrylate and sodium 2-phosphono-butane-tricarboxylate are preferred in terms of the balance between the cleaning properties and the stability of the alkali metal hypochlorite, which is component B.

[0028] The content of component F: polymer dispersant or phosphonate is preferably 0.5 to 7 mass%, more preferably 0.8 to 5 mass%, and particularly preferably 1 to 3 mass%. When it is 0.5 mass% or more, the cleaning property is improved. When it is 7 mass% or less, the stability of the alkali metal hypochlorite, which is component B, is improved.

[0029] [water] The water contained in the cleaning composition is the water contained in each of the above components when the components are hydrates, or the water added together with the above components when the components are aqueous solutions, or the water added separately. The water is not particularly limited and may be ion-exchanged water, soft water, pure water, tap water, or the like.

[0030] [Other ingredients] Furthermore, other ingredients commonly used in the art may be added within the range that does not impair the effect of the cleaning composition, such as defoamers, thickeners, fragrances, colorants, pH adjusters, etc.

[0031] [Manufacturing method] The cleaning agent composition can be obtained, for example, by weighing and mixing the various components so that the components are: component A: 0.5 to 6 parts by mass of an alkali metal hydroxide, component B: 0.1 to 5 parts by mass of an alkali metal hypochlorite, component C: 0.1 to 10 parts by mass of a silicate, component D: 0.01 to 1.0 part by mass of a nonionic surfactant, component E: 0.1 to 10 parts by mass of a solubilizing agent, and component F: 0.5 to 7 parts by mass of a polymeric dispersant or a phosphonate, and then diluting with water to adjust the content of component A to 6% by mass or less of the total amount.

[0032] [How to use] The cleaning composition can be further diluted with water before use. The degree of dilution is not particularly limited and may be appropriately selected depending on the type and degree of dirt. For example, the cleaning composition produced by the above-mentioned [production method] may be further diluted with water to a concentration of 0.1 to 50 mass %. That is, the cleaning composition can be used after being diluted 2 to 1000 times. Alternatively, the dilution may be 5 to 500 times, or 20 to 100 times.

[0033] The cleaning composition may be used at room temperature (20°C) or after heating. When the cleaning composition is heated, the temperature is preferably 20 to 80°C, more preferably 30 to 60°C, and particularly preferably 40 to 50°C. The temperature may be adjusted by diluting the cleaning composition with hot water (warm water) so as to fall within the above temperature range. Alternatively, the cleaning composition may be diluted with water and then heated using a heater or the like so as to fall within the above temperature range.

[0034] As described above, the cleaning agent composition according to the present disclosure can achieve both excellent cleaning properties and low foaming properties by combining component B: an alkali metal hypochlorite and component D: a nonionic surfactant. Conventionally, it has not been possible to stably blend a nonionic surfactant into a cleaning agent containing an alkali metal hypochlorite, but it has been found that these components can coexist stably by adjusting the blending amount of the alkaline agent and the type of solubilizer. As far as the applicant knows, a one-agent type cleaning agent blended with these two components is unprecedented.

[0035] Furthermore, the detergent composition according to the present disclosure can be used at a lower temperature than conventionally as a CIP detergent for cleaning the inside of manufacturing equipment used in dairy and food factories, etc., without disassembling the manufacturing equipment. Stainless steel, titanium, etc. are used as metal materials for such manufacturing equipment. The detergent composition according to the present disclosure can be used without corroding these metal materials. EXAMPLES

[0036] The present disclosure will be specifically described below with reference to examples and comparative examples. However, the present disclosure is not limited to the contents described in the following examples.

[0037] The reagents used in the examples and comparative examples are shown below. Component A: Alkali metal hydroxides, caustic soda (Pure content 48%, product name "48% liquid NaOH" manufactured by Toagosei Co., Ltd.) Component A: Alkali metal hydroxides Caustic potassium (Product name: "White caustic potash flakes" manufactured by Nippon Soda Co., Ltd.) Ingredient B: Alkali metal hypochlorite Sodium hypochlorite (Product name: "Tsurukron N40" manufactured by Toagosei Co., Ltd.) Ingredient C: Silicate Potassium silicate (Purity 40%, product name "A potassium silicate", manufactured by Nippon Chemical Industry Co., Ltd.) Component D: Surfactant 1 Nonionic surfactant, polyoxyalkylene alkyl ether (Product name: Lionol NH-1509, manufactured by Lion Specialty Chemicals Co., Ltd.) Component D: Surfactant 2 Nonionic surfactant, polyoxyalkylene ether (Product name: Adekanol B-2030 (manufactured by ADEKA Corporation) Component D: Surfactant 3 Nonionic surfactant, nonylphenoxy EO / PO polyalkylene glycol ethyl acetal (Product name: Triton CF-76, manufactured by Dow Chemical Japan Co., Ltd.) Component D: Surfactant 4 Amphoteric surfactant, decyldimethylamine oxide (Purity 30%, product name "Genaminox K-10" manufactured by Clariant) Component E: Solubilizer 1 Sodium 2-ethylhexanoate (Product name: "Octyl acid" manufactured by KH Neochem Co., Ltd., neutralized by adding a calculated amount of caustic soda) Component E: Solubilizer 2 Potassium 2-ethylhexanoate (Product name "Octyl acid" manufactured by KH Neochem Co., Ltd., neutralized by adding a calculated amount of caustic potassium) Component E: Solubilizer 3 Sodium m-xylene sulfonate (The reagent "m-xylene-4-sulfonic acid n-hydrate" manufactured by Kanto Chemical Co., Ltd. was neutralized by adding a calculated amount of caustic soda.) Component F: Polymer dispersant, polyacrylate (Purity 45%, product name "Frosperse 3000" (manufactured by SNF Co., Ltd.) Component F: Phosphonate: Sodium 2-phosphono-1,2,4-butanetricarboxylate (50% pure, product name "Crest Guard 414" manufactured by Crest Water LLC, neutralized with a calculated amount of caustic soda)

[0038] [Preparation of cleaning composition] For Examples 1-6, the cleaning compositions were prepared based on the blending ratios shown in Table 1 of Fig. 1. For Examples 7-11, the cleaning compositions were prepared based on the blending ratios shown in Table 2 of Fig. 2. For Comparative Examples 1-6, the cleaning compositions were prepared based on the blending ratios shown in Table 3 of Fig. 3.

[0039] <Chlorine concentration stability> 50 ml of each cleaning composition was placed in a 50 ml polypropylene container, sealed, and stored at 40°C for one month. The available chlorine concentration (%) was measured by neutralization titration with a sodium thiosulfate solution, and the residual rate (%) was calculated using the following formula (1). Survival rate (%)= [Available chlorine concentration after storage (%) / Available chlorine concentration immediately after production (%)] x 100 (1) The remaining rate was evaluated according to the following criteria. 〇: More than 50% remained. △: 30% or more but less than 50% remained. ×: Less than 30% remained.

[0040] <Liquid stability (40℃)> 50 ml of each detergent composition was placed in a 50 ml polyethylene container and stored in an incubator set at 40° C. for 30 days, after which the state of the detergent composition was visually observed. The storage stability was evaluated according to the following criteria. ○: No separation of components was observed. △: Slight separation was observed. ×: The components were completely separated.

[0041] <Liquid stability (-5℃)> 50 ml of each detergent composition was placed in a 50 ml polyethylene container and stored in an incubator set at -5°C for 30 days, after which the state of the detergent composition was visually observed. The storage stability was evaluated according to the following criteria. ◯: No precipitation or freezing was observed. Δ: A slight amount of precipitate was formed. ×: Frozen.

[0042] <Cleaning ability (non-heated stains)> Fresh cream (product name "Hokkaido Pure Fresh Cream 35" manufactured by Takanashi Dairy Co., Ltd.) was dropped onto a clean stainless steel piece (5 cm x 10 cm x 1 mm, SUS304) in 9 spots of 25 μL (total 225 μL), and the piece was air-dried at room temperature for 24 hours to simulate unheated milk fat stains. A 300 ml beaker was charged with 300 ml of a diluted detergent solution of a detergent composition diluted to 2% by mass with tap water, and the temperature was raised to 45° C. The simulated soil was hung by a clip and immersed in the diluted detergent solution while stirring with a magnetic stirrer, and after 30 minutes, it was rinsed with ion-exchanged water and air-dried at room temperature. The appearance was visually evaluated according to the following criteria. A: Almost completely removed. △: Some spots remained. ×: Spot marks and oil stains remained all over the surface.

[0043] <Cleaning ability (heat stains)> A 50μL x 12 spots (total 600μL) of a dairy drink (product name "Wataboku Coffee 1000ml" manufactured by Mori Dairy Co., Ltd.) was dropped onto a clean stainless steel piece (5cm x 10cm x 1mm, SUS304) and dried at 135°C for 24 hours to simulate heated stains of the dairy drink. A 300 ml beaker was charged with 300 ml of a diluted detergent solution of a detergent composition diluted to 10% by mass with tap water, and the temperature was raised to 45° C. The simulated soil was immersed in the diluted detergent solution by hanging it with a clip while stirring with a magnetic stirrer, and after 60 minutes, it was rinsed with ion-exchanged water and air-dried at room temperature. The appearance was visually evaluated according to the following criteria. A: Almost completely removed. △: Some oil stains remained. ×: Burnt solid stains remained.

[0044] <Low foaming> Each detergent composition was diluted with tap water to 2% by mass, and 30 ml of the diluted detergent solution was measured out into a 100 ml stoppered graduated cylinder and placed in a warm bath at 45°C for 10 minutes. The stoppered graduated cylinder was then removed and shaken up and down 10 times. The foam volume (ml) was measured immediately after shaking and evaluated according to the following criteria. ○: The amount of foam was less than 10 ml. △: The amount of foam was 10 ml or more but less than 20 ml. ×: The amount of foam was 20 ml or more.

[0045] <Low corrosion resistance (SUS)> Each detergent composition was diluted with tap water to 5% by mass, and 550 g of the diluted detergent solution was placed in a polyethylene container and heated to 75° C. A clean stainless steel piece (5 cm×10 cm×1 mm, SUS304) was immersed in the diluted detergent solution for 72 hours. The appearance of the stainless steel piece after immersion was evaluated according to the following criteria. A: There was no discoloration. ×: Discoloration occurred.

[0046] Example 1 is a cleaning composition having the blending ratio of the present disclosure. Example 1 was evaluated as "good" in all of the following: chlorine concentration stability, liquid stability, cleaning performance, low foaming property, and low corrosiveness. Example 2 is a cleaning composition having the same composition as Example 1, except that a phosphonate was used instead of the polymeric dispersant as Component F. As in Example 1, all evaluations were "good". Example 3 is a cleaning composition in which the amount of component A (alkali metal hydroxide) is increased compared to Example 1. Example 4 is a cleaning composition different from Example 1 in the blending ratio of components other than Component F: polymer dispersant. Example 5 is a cleaning composition in which the amount of component A (caustic soda) is reduced and the amount of component D (surfactant) is increased compared to Example 1. Example 6 is a cleaning composition in which the amount of component D (surfactant) is reduced compared to Example 1. As with Example 1, all evaluations were "good". Example 7 is a cleaning composition in which, as Component E: solubilizer, a different type of solubilizer was used from the solubilizer used in Example 1. As in Example 1, all evaluations were "good". Example 8 is a cleaning composition in which the amount of component F (polymeric dispersant) is reduced compared to Example 1. Example 9 is a cleaning composition in which the amount of component F: polymer dispersant is increased compared to Example 1. As with Example 1, all evaluations were "good". Example 10 is a cleaning composition in which a part of component D: surfactant in Example 1 was replaced with a different type of nonionic surfactant. As in Example 1, all evaluations were "good". Example 11 is a cleaning composition in which the amounts of component A: caustic soda and component B: sodium hypochlorite in Example 1 are reduced, all of component D: surfactant are replaced with different types of nonionic surfactant, and the amount of component E: solubilizer is increased.

[0047] Comparative Example 1 is a cleaning composition that does not contain Component D: surfactant and Component E: solubilizer. Comparative Example 1 was insufficient in terms of liquid stability at -5°C and cleaning properties against unheated stains. Comparative Example 2 is a cleaning composition containing too much alkali metal hydroxide (Component A). Comparative Example 2 had insufficient chlorine concentration stability. Comparative Example 3 is a cleaning composition that uses an amphoteric surfactant as Component D: the surfactant, and does not contain a solubilizing agent as Component E. Comparative Example 3 was insufficient in terms of liquid stability at -5°C, cleaning ability against unheated stains, and low foaming ability. Comparative Example 4 is a cleaning composition that does not contain Component C: silicate. Comparative Example 4 was insufficient in cleaning performance against non-heated stains and in low corrosiveness against SUS. Comparative Example 5 is a cleaning composition that does not contain Component B: an alkali metal hypochlorite. Comparative Example 5 was insufficient in terms of liquid stability at -5°C and cleaning performance against heat stains. Comparative Example 6 is a cleaning composition that does not contain Component F: a polymeric dispersant or a phosphonate. Comparative Example 6 had insufficient cleaning properties for non-heated stains.

[0048] As described above, the cleaning composition according to the present disclosure has excellent chlorine concentration stability, excellent liquid stability at 40°C and -5°C, allowing for long-term storage, excellent cleaning properties at lower temperatures than conventional cleaning compositions, excellent low-foaming properties that allow for easy rinsing, and low corrosiveness to SUS, which is widely used in manufacturing equipment at food factories.

Claims

1. A liquid detergent composition for CIP cleaning, comprising: Per 100% by mass of the liquid detergent composition, Component A: 1 to 5 mass% of an alkali metal hydroxide, Component B: 1 to 4 mass% of an alkali metal hypochlorite, Component C: 1 to 4% by mass of silicate; Component D: 0.05 to 0.8% by mass of a nonionic surfactant, Component E: 0.5 to 8% by mass of a solubilizer, Component F: 0.8 to 5% by mass of a polymer dispersant or a phosphonate; Water, The component D comprises a polyoxyalkylene ether, The component E comprises an alkali metal salt of a fatty acid or an alkali metal salt of an aromatic sulfonic acid, The polymer dispersant of Component F contains at least one selected from the group consisting of polyacrylic acid or an alkali metal salt thereof, a copolymer of acrylic acid and maleic acid or an alkali metal salt thereof, a copolymer of styrene sulfonic acid and maleic acid or an alkali metal salt thereof, and a copolymer of styrene sulfonic acid and acrylic acid or an alkali metal salt thereof. Liquid cleaning compositions.

2. A liquid detergent composition for CIP cleaning, comprising: Per 100% by mass of the liquid detergent composition, Component A: 1 to 5 mass% of an alkali metal hydroxide, Component B: 1 to 4 mass% of an alkali metal hypochlorite, Component C: 1 to 4% by mass of silicate; Component D: 0.05 to 0.8% by mass of a nonionic surfactant, Component E: 0.5 to 8% by mass of a solubilizer, Component F: 0.8 to 5% by mass of a polymer dispersant or a phosphonate; It consists only of water, The component D comprises a polyoxyalkylene ether, The component E comprises an alkali metal salt of a fatty acid or an alkali metal salt of an aromatic sulfonic acid, The polymer dispersant of Component F contains at least one selected from the group consisting of polyacrylic acid or an alkali metal salt thereof, a copolymer of acrylic acid and maleic acid or an alkali metal salt thereof, a copolymer of styrene sulfonic acid and maleic acid or an alkali metal salt thereof, and a copolymer of styrene sulfonic acid and acrylic acid or an alkali metal salt thereof. Liquid cleaning compositions.

3. The component A is caustic soda or caustic potassium, The component B is sodium hypochlorite, The component C is potassium silicate, The component E is sodium 2-ethylhexanoate, potassium 2-ethylhexanoate, or sodium m-xylene sulfonate; The component F is a polyacrylate or sodium 2-phosphono-1,2,4,butanetricarboxylate; The liquid detergent composition according to claim 1 or 2.

4. The liquid detergent composition according to claim 1 or 2 is heated to 20 to 60°C for use. How to use liquid cleaners.

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