Detergent composition

Abstract

To provide a detergent composition which has sterilizing properties and storage stability, suppresses the accumulation of foams by compounding a cationic surfactant and a small amount of a polymer dispersant, and has excellent foam suppressing properties to be used, for example, in an automatic washing machine and CIP washing.SOLUTION: A detergent composition comprising (A) 0.5 to 25.0% by mass of a cationic surfactant, (B) 0.01 to 0.10% by mass of a polymer dispersant, and (C) an alkyldimethylamine oxide having an alkyl group or alkylene group having 8 to 10 carbon atoms.SELECTED DRAWING: None

Description

Detailed Description of the Invention [Technical Field]

[0001] The present invention relates to a detergent composition having antibacterial properties, storage stability, and excellent foam suppressing properties that inhibit foam accumulation. [Background technology]

[0002] Automatic dishwashers have traditionally been used to efficiently clean plastic parts in automatic food forming machines such as meatball forming machines, croquette forming machines, and rice ball forming machines, as well as cooking utensils such as mixer bowls, and shipping containers (containers). Automatic dishwashers are also used to efficiently clean tableware at various restaurants, food service companies, and company cafeterias. Meanwhile, for production equipment that is difficult to disassemble and clean, such as raw material storage tanks and sanitary piping at food and beverage manufacturing and processing plants, CIP (Cleaning in Place) cleaning is used, which allows safe, automatic cleaning with simple operations without disassembly.

[0003] There are a wide variety of automatic cleaning machines, but the most common type is the nozzle-jet type, which pressurizes and circulates the cleaning fluid inside the machine and sprays the high-pressure cleaning fluid from a nozzle onto the object to be cleaned. In CIP cleaning, cleaning fluid is circulated through production equipment to remove and clean raw material residue that has adhered to the production process line. In these automatic cleaning machines and CIP cleaning, the cleaning fluid can foam during the cleaning process due to the pressurization, circulation, and spraying of the cleaning fluid.

[0004] On the other hand, for food hygiene reasons, cationic surfactants with excellent disinfecting properties are sometimes used in the cleaning solutions used in these automatic cleaning machines and CIP cleaning, and they are sometimes used in combination with amine oxide surfactants, nonionic surfactants, etc. to enhance cleaning and disinfecting properties. Cationic surfactants generally have excellent foaming properties, and when used in combination with amine oxide surfactants, the foaming properties may be enhanced due to the synergistic effect with the cationic surfactant.

[0005] In automatic cleaning machines, CIP cleaning, etc., if the cleaning solution foams too much, the foam generated can hinder the contact of the cleaning solution with the object or surface being cleaned, or the cleaning effect can be reduced due to a decrease in the spray force and spray volume caused by spraying the foam, or the foam can overflow outside the cleaning device, which can lead to problems such as the cleaning process being stopped due to an error, contamination of the exterior of the cleaning device, and the risk of workers coming into contact with chemicals. Therefore, it is necessary to reduce the foam amount in the cleaning solution and improve its foam-breaking properties to prevent foam accumulation.

[0006] Patent Document 1 describes a detergent composition for automatic washing machines containing (a) 0.5 to 30% by weight of one or more alkaline agents, (b) 0.5 to 30% by weight of a polyacrylic acid or maleic acid-based polymeric substance having a metal ion-scavenging ability and an average molecular weight of 500 to 20,000, and (c) 0.1 to 10% by weight of a bleaching agent. Patent Document 2 describes a germicidal detergent composition containing a cationic germicide [component (A)], an amine oxide surfactant having one hydrocarbon group with 9 to 12 carbon atoms [component (B)], and an amine oxide surfactant having one hydrocarbon group with 13 or 14 carbon atoms [component (C)], wherein the mass ratio of [content of component (A)] / [content of component (B) + content of component (C)] is 0.2 to 5. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 08-199194 [Patent Document 2] Japanese Patent Application Publication No. 2019-081891 Summary of the Invention [Problem to be solved by the invention]

[0008] Patent Document 1 discloses the cleaning effect achieved by blending predetermined amounts of an alkaline agent, a specific polymeric substance having metal ion-trapping ability, and a bleaching agent, and the scale adhesion prevention effect achieved by the specific polymeric substance having metal ion-trapping ability. However, when a cationic surfactant is further added to impart disinfecting properties, it is necessary to further consider the anti-foaming effect. Patent Document 2 discloses the cleaning effect and anti-microbial effect achieved by blending a cationic disinfectant with two amine oxide surfactants having different carbon number ranges. However, there is no disclosure of the anti-foaming effect.

[0009] The present inventors have conducted extensive research in light of the above circumstances and have found a means for reducing the amount of foam generated in a cleaning solution and improving its foam-breaking properties by adding a predetermined amount of a polymeric dispersant to a cleaning composition containing a cationic surfactant. As a result, they have completed the cleaning composition of the present invention, which has disinfecting properties and storage stability, as well as excellent foam-suppressing properties that inhibit foam accumulation. [Means for solving the problem]

[0010] The present invention is based on these findings and includes the following inventions.

[0011] [1] (A) 0.5 to 25.0 mass% of a cationic surfactant; (B) 0.01 to 0.10 mass% of a polymer dispersant; (C) an alkyldimethylamine oxide having an alkyl or alkylene group having 8 to 10 carbon atoms; [2] Furthermore, (D) a nonionic surfactant; (E) an alkali metal hydroxide; The cleaning composition according to [1], wherein the total content of the (C) alkyldimethylamine oxide having an alkyl group or alkylene group with 8 to 10 carbon atoms and the (D) nonionic surfactant [(C) + (D)] does not exceed 25.0 mass% based on the total amount of the cleaning composition, and the content of the (E) alkali metal hydroxide is 0.4 to 5.0 mass% based on the total amount of the cleaning composition. [3] The cleaning composition according to [1] or [2], wherein the (A) cationic surfactant is one or more selected from benzalkonium chloride, didecyldimethylammonium methosulfate, dioctyldimethylammonium chloride, and alkyldimethylhydroxyethylammonium chloride, and the (B) polymer dispersant is one or more compounds having a weight-average molecular weight of 2,000 to 17,000 selected from polyacrylic acid, acrylic acid-maleic acid copolymer, maleic acid-diisobutene copolymer, and salts thereof. [4] The cleaning composition according to any one of [1] to [3], wherein the mass ratio [(A) / (B)] of the (A) cationic surfactant to the (B) polymeric dispersant is 10 to 1000, and / or the mass ratio [(A) / (C)] of the (A) cationic surfactant to the (C) alkyldimethylamine oxide having an alkyl group or alkylene group having 8 to 10 carbon atoms is 0.1 to 6.0. [5] The cleaning composition according to any one of [2] to [4], wherein the (D) nonionic surfactant is at least one selected from a polyoxyethylene-polyoxypropylene block polymer and a reverse polyoxyethylene-polyoxypropylene block polymer. [6] (F) A cleaning composition according to any one of [1] to [5], which contains water and is used in an automatic cleaning machine and / or CIP cleaning. [Effects of the Invention]

[0012] The cleaning composition of the present invention has disinfecting properties and storage stability, and also reduces the amount of foam generated and improves foam-breaking properties, thereby suppressing foam accumulation and preventing problems such as overflow caused by foam accumulation that occur in, for example, automatic cleaning machines and CIP cleaning. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, the best mode for carrying out the present invention will be described in detail.

[0014] The cationic surfactant (A) used in the present invention is contained from the viewpoint of cleansing properties, disinfecting properties, and foam suppression, and examples thereof include dialkyldimethylammonium salts such as didecyldimethylammonium chloride and distearyldimethylammonium chloride, alkyltrimethylammonium salts such as stearyltrimethylammonium chloride, alkyldimethylbenzylammonium salts such as alkyldimethylbenzylammonium chloride, biguanide compounds such as polyhexamethylenebiguanidine hydrochloride and chlorhexidine gluconate, and quaternary ammonium salts such as benzalkonium chloride, benzethonium chloride, alkyl(C12-16)dimethylbenzylammonium chloride, didecyldimethylammonium methosulfate, dioctyldimethylammonium chloride, and alkyldimethylhydroxyethylammonium chloride. These cationic surfactants may be used alone or in combination of two or more.

[0015] Among these cationic surfactants, quaternary ammonium salts are preferably used, and among the quaternary ammonium salts, alkyl (C12-16) dimethylbenzyl ammonium chloride, didecyl dimethyl ammonium methosulfate, dioctyl dimethyl ammonium chloride, and alkyl dimethyl hydroxyethyl ammonium chloride are more preferably used. These quaternary ammonium salts may be used alone or in combination of two or more.

[0016] The (A) cationic surfactant is contained in the present cleanser composition in an amount of 0.5 to 25.0% by mass, preferably 0.8 to 20.0% by mass, more preferably 1.5 to 10.0% by mass, and even more preferably 4.0 to 10.0% by mass. A low content tends to decrease the anti-foaming ability, while a higher content increases the antibacterial ability but tends to decrease the anti-foaming ability and storage stability, and may approach the upper limit of the antibacterial ability, which may not be economically advantageous.

[0017] The (B) polymer dispersant used in the present invention is contained from the viewpoint of foam suppression, and refers to a polymer having a structural unit containing a carboxyl group, and examples thereof include acrylic acid polymers and their salts, maleic acid polymers and their salts, acrylic acid-maleic acid copolymers and their salts, poly-α-hydroxyacrylic acid and its salts, acrylic acid-maleic acid-polyethylene glycol copolymers and their salts, olefin-maleic acid copolymers and their salts, acrylic acid-sulfonic acid copolymers and their salts, maleic acid-sulfonic acid copolymers and their salts, copolymers of acrylic acid and 2-hydroxy-3-allyloxypropanesulfonic acid and their salts, and copolymers of methyl vinyl ether and maleic acid and their salts, and these salts may be metal salts of partially neutralized products. These (B) polymer dispersants may be used alone or in combination of two or more.

[0018] Among these (B) polymer dispersants, polyacrylic acid, acrylic acid-maleic acid copolymer, maleic acid diisobutene copolymer, and salts thereof are preferably used, particularly from the viewpoint of foam suppression, and from the viewpoints of economy and availability, sodium polyacrylate (partially neutralized) is used as the salt of polyacrylic acid, polymaleic acid copolymer is used as the acrylic acid-maleic acid copolymer, sodium polyacrylate is used as the salt of polyacrylic acid, and sodium salt of maleic acid diisobutene copolymer is used as the salt of maleic acid diisobutene copolymer.

[0019] The weight-average molecular weight of the polymer dispersant (B) used in the present invention is preferably in the range of 2,000 to 17,000, more preferably in the range of 3,000 to 15,000, even more preferably in the range of 3,000 to 12,000, and particularly preferably in the range of 3,000 to 4,500. This is because a high weight-average molecular weight tends to decrease storage stability and anti-foaming properties, while a low weight-average molecular weight tends to fail to exhibit anti-foaming properties.

[0020] From the viewpoints of storage stability and foam suppression, the (B) polymer dispersant is contained in the present cleanser composition in an amount of 0.01 to 0.1 mass %, preferably 0.02 to 0.07 mass %, and more preferably 0.03 to 0.06 mass %. This is because a high content tends to decrease foam-breaking properties, while a low content tends to increase foam generation.

[0021] From the viewpoint of foam suppression, the mass ratio [(A) / (B)] of the (B) polymeric dispersant to the (A) cationic surfactant of the present invention is preferably in the range of 10 to 1,000, more preferably in the range of 30 to 600, and even more preferably in the range of 80 to 300. This is because a small mass ratio reduces the foam volume but decreases the foam-breaking ability, whereas a large mass ratio tends to increase the foam volume but decrease the foam-breaking ability. Most preferably, the (A) cationic surfactant is contained in the range of 4.0 to 10.0 mass% of the total detergent composition, and the mass ratio [(A) / (B)] of the (A) cationic surfactant to the (B) polymeric dispersant is in the range of 80 to 300. This is because the resulting composition has excellent foam-reduction and foam-breaking properties, and has remarkable foam suppression.

[0022] That is, by adjusting the mass ratio [(A) / (B)] of the (A) cationic surfactant to the (B) polymeric dispersant, the present cleansing composition can reduce the amount of foam generated, improve foam-breaking properties, and inhibit foam accumulation.

[0023] The (C) alkyldimethylamine oxide having an alkyl or alkylene group having 8 to 10 carbon atoms used in the present invention is contained from the viewpoints of storage stability, cleaning performance, and foam suppression, and examples thereof include octyldimethylamine oxide and decyldimethylamine oxide. Of these, those in which the alkyl or alkylene group has 8 or 10 carbon atoms are preferred. These may be used alone or in combination of two or more. Use of an alkyldimethylamine oxide having an alkyl or alkylene group with more than 12 carbon atoms is undesirable for the present cleaning composition because it results in insufficient foam suppression.

[0024] The content of (C) alkyldimethylamine oxide having an alkyl or alkylene group with 8 to 10 carbon atoms, in total with the content of (D) nonionic surfactant described below, is not more than 25.0 mass% of the entire cleanser composition, preferably 15.0 mass% or less, more preferably 0.01 to 6.0 mass%, and even more preferably 0.8 to 6.0 mass%. Too much content can be disadvantageous in productivity and economy, while too little content tends to increase foaming volume and reduce storage stability.

[0025] Furthermore, from the viewpoint of foam suppression, the mass ratio [(A) / (C)] of the (C) alkyldimethylamine oxide having an alkyl or alkylene group with 8 to 10 carbon atoms to the (A) cationic surfactant is preferably in the range of 0.1 to 6.0, more preferably 0.3 to 6.0, and even more preferably 0.6 to 6.0. A small mass ratio reduces the foam volume but impairs foam-breaking properties, whereas a large mass ratio reduces the foam volume and improves foam-breaking properties. Most preferably, the (A) cationic surfactant is contained in an amount of 4.0 to 10.0 mass% based on the total mass of the cleanser composition, and the mass ratio [(A) / (C)] of the (A) cationic surfactant to the (C) alkyldimethylamine oxide having an alkyl or alkylene group with 8 to 10 carbon atoms is in the range of 0.6 to 6.0. This is because the composition exhibits excellent foam volume reduction and foam-breaking properties, as well as remarkable foam suppression.

[0026] That is, by incorporating the (B) polymeric dispersant in the range of 0.01 to 0.1 mass % and adjusting the mass ratio [(A) / (C)] of the (A) cationic surfactant to the (C) alkyldimethylamine oxide having an alkyl or alkylene group having 8 to 10 carbon atoms, the present detergent composition can reduce the amount of foam generated, improve foam-breaking properties, and inhibit foam accumulation.

[0027] The mass ratio [(C) / (B)] of the (C) alkyldimethylamine oxide having an alkyl group or alkylene group with 8 to 10 carbon atoms to the (B) polymeric dispersant is preferably in the range of 10 to 700, more preferably 10 to 400, and even more preferably 10 to 200. Most preferably, the (C) alkyldimethylamine oxide having an alkyl group or alkylene group with 8 to 10 carbon atoms is contained in the range of 0.8 to 10.0 mass% of the entire cleansing composition, and the mass ratio [(C) / (B)] of the (C) alkyldimethylamine oxide having an alkyl group or alkylene group with 8 to 10 carbon atoms to the (B) polymeric dispersant is in the range of 10 to 200. This is because adjusting the mass ratio can reduce the amount of foaming and improve foam-breaking properties.

[0028] Examples of the nonionic surfactant (D) used in the present invention include polyoxyethylene alkyl ethers, polyoxyalkylene dialkyl ethers, polyoxyethylene alkenyl ethers, polyoxyalkylene alkylphenyl ethers, Pluronic® block polymers, Tetronic block polymers, reverse Pluronic block polymers, reverse Tetronic block polymers, fatty acid esters such as sucrose fatty acid esters, sorbitan fatty acid esters, polyethylene glycol fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, and polypropylene glycol fatty acid esters; fatty acid alkanolamides such as coconut fatty acid diethanolamide (1:1), coconut fatty acid diethanolamide (1:2), lauric acid diethanolamide, lauric acid myristic acid diethanolamide, myristic acid diethanolamide, oleic acid diethanolamide, and palm kernel fatty acid diethanolamide; alkyl glucosides; and amine oxides. These nonionic surfactants may be used alone or in combination of two or more.

[0029] Among the (D) nonionic surfactants, those with low foaming properties and cleansing properties are preferred, and polyoxyethylene alkyl ethers, polyoxyalkylene dialkyl ethers, polyoxyalkylene alkylphenyl ethers, Tetronic block polymers, Pluronic block polymers, reverse Pluronic block polymers, reverse block polymers, reverse Tetronic block polymers, polyoxyethylene-polyoxypropylene block polymers, and reverse polyoxyethylene-polyoxypropylene block polymers are preferred. Among these, polyoxyethylene-polyoxypropylene block polymers and reverse polyoxyethylene-polyoxypropylene block polymers are more preferred, and a combination of polyoxyethylene-polyoxypropylene block polymers and reverse polyoxyethylene-polyoxypropylene block polymers is most preferred. These low-foaming nonionic surfactants may be used alone or in combination of two or more.

[0030] The (D) nonionic surfactant used in the present invention may be contained in an amount not exceeding 25.0 mass % based on the total amount of the present detergent composition, in combination with the (C) alkyldimethylamine oxide having an alkyl or alkylene group having 8 to 10 carbon atoms. If the amount is too large, productivity and economical disadvantages may arise.

[0031] When the present invention contains the nonionic surfactant (D), the content of the nonionic surfactant (D) is preferably 15.0% by mass or less, more preferably 1.0 to 5.0% by mass, and even more preferably 3.0 to 5.0% by mass, based on the total mass of the detergent composition. Most preferably, two or more low-foaming nonionic surfactants (D) are used in combination, and the content is 3.0 to 5.0% by mass, based on the total mass of the detergent composition. If the content is too low, storage stability tends to decrease, while if the content is too high, the desired effect may not be achieved due to factors such as the balance with other components.

[0032] The alkali metal hydroxide (E) used in the present invention includes sodium hydroxide, potassium hydroxide, and lithium hydroxide. These may be used alone or in combination of two or more. Among them, sodium hydroxide and potassium hydroxide are preferably used from the viewpoint of cleaning properties and storage stability, and potassium hydroxide is more preferably used from the viewpoint of storage stability in particular.

[0033] When the present invention contains the alkali metal hydroxide (E), the alkali metal hydroxide (E) is preferably contained in an amount of 5.0 mass % or less, more preferably in the range of 0.4 to 5.0 mass %, based on the total mass of the present cleaning composition. If the content is too low, storage stability tends to decrease, while if the content exceeds 5.0 mass %, the cleaning composition becomes a deleterious substance, making it less practical.

[0034] Examples of the (F) water used in the present invention include pure water, ion-exchanged water, soft water, distilled water, and tap water. These may be used alone or in combination of two or more. Among these, tap water and ion-exchanged water are preferred from the standpoints of economy and storage stability. The (F) water is the sum of water contained in the form of crystals or aqueous solutions derived from the components constituting the present composition and water added from outside, and is blended so that the total amount of the present cleaning composition is 100% by mass.

[0035] The form of the detergent composition of the present invention is not particularly limited, but from the viewpoints of storage stability and dosing ease, liquid, powder, and solid forms are preferred, with liquid being more preferred. Here, solid refers to a detergent composition solidified by dissolving the raw materials in water and bringing them into a supersaturated state, and the solid form has a lower (F) water content than liquid and higher than powder. Such solid forms are formed by a composition with a solid content of approximately 55 to 75 mass% and the remainder water, depending on the type of raw materials. In contrast, powder detergent compositions contain almost no water.

[0036] The detergent composition of the present invention may contain other surfactants, fragrances, dyes, preservatives, metal corrosion inhibitors, sequestering agents, solubilizing agents, antifoaming agents, cloud point improvers, thickeners, and the like as optional components within the range that does not impair the foam-inhibiting properties.

[0037] The cleaning composition of the present invention can be generally produced by stirring and mixing the components if they are liquid; by dissolving solid components in water, then adding other liquid components and stirring and mixing, or by adding solid components directly to other liquid components and stirring and mixing. The production procedure is not particularly limited, and the order of addition and dissolution of the components, as well as heating / cooling (if necessary), can be appropriately selected and adjusted depending on the composition of the composition. Furthermore, the method for producing the cleaning composition of the present invention in a powder or solid form is not particularly limited, and commonly used condensation and drying methods can be used.

[0038] The concentration of the present detergent composition obtained by diluting the present detergent composition with water may be appropriately diluted as long as it can clean the object to be cleaned, but when used in an automatic cleaning machine or CIP cleaning, it is preferable to dilute the present detergent composition so that the content is in the range of 0.1 to 1.0 mass %. This is because if the content of the detergent composition is too low, the disinfecting properties and cleaning properties will decrease, and if it is too high, the foam suppressing properties will decrease and the cost will be low.

[0039] The cleaning target and mode of use of the detergent composition of the present invention are not particularly limited, but it is suitable for use in automatic dishwashers that clean various parts and utensils such as automatic food forming machines in various food manufacturing and processing factories, various parts and utensils for cooking machines, trays, and plastic containers used in distribution. It is also suitable for use in so-called commercial automatic dishwashers that clean tableware used in hotels, restaurants, schools, hospitals, social welfare facilities, eating and drinking establishments, food service companies, company cafeterias, etc., as well as in household automatic dishwashers that clean tableware used in homes. Furthermore, it can be used to clean hard surfaces such as tiles and floors in various food manufacturing and processing factories, containers such as glass bottles used for serving beverages, and metal surfaces.

[0040] Here, the term "automatic dishwasher" refers to a machine that automatically washes objects to be washed related to the various food manufacturing and processing methods described above, as well as tableware used to handle food and beverages, and is available in door-type, under-counter-type, rack-conveyor-type, flight-conveyor-type, etc. In particular, the detergent composition of the present invention is preferably applied to door-type machines, which are prone to problems caused by foam accumulation, such as overflow.

[0041] When the cleaning composition of the present invention is used in CIP cleaning, the production equipment to be cleaned is not particularly limited, and it is suitably used for production equipment in beer breweries, soft drink factories, soy sauce factories, soy milk beverage factories, egg processing factories, pharmaceutical factories, etc. The cleaning composition of the present invention can also be used as a cleaning liquid in the alkaline cleaning step or sterilization step of CIP cleaning, or as a sterilization additive in the CIP cleaning step.

[0042] When the cleaning composition of the present invention is used in CIP cleaning, it is preferable to circulate a cleaning liquid diluted to contain 0.1 to 1.0 mass % of the cleaning composition so that the liquid contacts the inside of a tank, a pipe, and the inside of various equipment. [Example]

[0043] Next, examples will be described together with comparative examples. The present invention is not limited to these examples. First, in order to prepare a detergent composition, the following components were prepared. The values ​​of each component indicate the pure content of each component, and "%" is by mass unless otherwise specified.

[0044] (A) Cationic surfactant a-1: C12-16 alkyl dimethylbenzyl ammonium chloride (Product name: Acticide BAC50, purity: 50%, manufactured by Thor Japan) a-2: Didecyldimethylammonium methosulfate (Product name: Lipoguard 210-80-MSPG, purity: 80%, manufactured by Lion Specialty Chemicals) a-3: Dioctyldimethylammonium chloride (Product name: Bardock LF-80, purity: 80%, manufactured by Arcsada Japan) a-4: Alkyldimethylhydroxyethylammonium chloride (Product name: Hostapure HY, purity: 40%, manufactured by Clariant Japan)

[0045] (B) Polymer dispersant b-1: Polyacrylic acid / polymaleic acid copolymer (Product name: Sokaran CP12S, purity: 50%, weight-average molecular weight: 3,000, manufactured by BASF Japan Ltd.) b-2: Sodium polyacrylate (partially neutralized) (Product name: Accusol 445, purity: 48%, weight average molecular weight: 4,500, manufactured by Dow Chemicals) b-3: Sodium salt of maleic acid diisobutene copolymer (Product name: Sokalan CP9, purity: 25%, weight-average molecular weight: 12,000, manufactured by BASF Japan Ltd.) b-4: Sodium Polyacrylate (Product name: Sokaran PA40, purity: 40%, weight-average molecular weight: 15,000, manufactured by BASF Japan Ltd.) b-5: Sodium Polyacrylate (Product name: Accusol 497NG, purity: 92%, weight average molecular weight: 70,000, manufactured by Dow Chemicals)

[0046] (C) Alkyldimethylamine oxide having an alkyl or alkylene group with 8 to 10 carbon atoms c-1: Octyldimethylamine oxide (carbon number: 8) (Product name: Genaminox OC, purity: 30%, manufactured by Clariant Japan) c-2: Decyldimethylamine oxide (carbon number: 10) (Product name: Genaminox K-10, purity: 29%, manufactured by Clariant Japan) c-3: Lauryl dimethylamine oxide (carbon number: 12) (Product name: "Cadenax DM12D-W(C)", purity: 33%, manufactured by Lion Specialty Chemicals)

[0047] (D) Nonionic surfactants d-1: Polyoxyethylene-polyoxypropylene block polymer reverse type (Product name: ADEKA Pluronic 25R-2, purity: 100%, manufactured by ADEKA Corporation) d-2: Polyoxyethylene-polyoxypropylene block polymer (Product name: ADEKA Pluronic L-61, purity: 100%, manufactured by ADEKA Corporation)

[0048] (E) Alkali metal hydroxide e-1: Potassium hydroxide (Product name: Liquid Caustic Potash, purity: 48%, manufactured by AGC Chemicals) e-2: Sodium hydroxide (Product name: Liquid Caustic Soda, purity: 48%, manufactured by AGC Chemicals)

[0049] (F) Water: Ion-exchanged water

[0050] (Other ingredients) Ethylenediaminetetraacetic acid tetrasodium salt: EDTA (Product name: "EDTA4Na 40% aqueous solution", purity: 40%, weight average molecular weight: 452, manufactured by Jackchem) L-Glutamic acid diacetate tetrasodium salt: GLDA (Product name: Dissolvin GL-47-S, purity: 47%, weight-average molecular weight: 263, manufactured by Akzo Nobel)

[0051] <Foam suppression performance test> A 0.5% diluted solution of each test detergent composition shown in the table below (the units of values ​​for each component in the table are "mass %") was prepared using ion-exchanged water and subjected to testing at room temperature. The test method and evaluation criteria are as follows.

[0052] [Foaming amount] Testing Method 30 mL was poured into a 100 mL color comparison tube with an outer diameter of 28 mm, and after shaking vigorously 20 times, the difference in the volume from the 30 mL mark to the top of the foam was taken as the foam volume. The unit of the foam volume is mL. Evaluation criteria ⊚: The foam volume is 20 mL or more less than that of the comparative example. ◯: The difference in foam volume from the comparative example is less than 20 mL, or 10 mL or more less. △: The difference in foam volume from the comparative example is less than 10 mL, 5 mL or more less. ×: The difference from the comparative example is less than 5 mL. ◎, ○, △ were evaluated as practical.

[0053] [Bubble-breaking property] Testing Method 30 mL was placed in a 100 mL color comparison tube with an outer diameter of 28 mm, and the difference between the scale value on the top surface of the foam immediately after 20 strong shakes and the scale value to the top surface of the foam 30 seconds later was taken as the amount of foam that broke. Also, the difference between the scale value from the 30 mL mark to the top surface of the foam 30 seconds after 20 strong shakes was taken as the amount of residual foam. For examples in which there were no bubbles 30 seconds after 20 strong shakes, the number of seconds until the bubbles disappeared was recorded. Evaluation criteria ◎: No bubbles after 30 seconds. ◯: Bubbles remain after 30 seconds, but the amount of bubbles that breaks is greater than in the comparative example. △: Foam remains after 30 seconds, but the amount of remaining foam is less than that of the comparative example. ×: Foam remains after 30 seconds, but the amount of remaining foam is greater than that of the comparative example. ◎, ○, △ were evaluated as practical.

[0054] [Foam suppression effect] The foaming amount test and the foam suppression test were carried out, and the practicality was evaluated according to the following evaluation criteria: Excellent, Good, Fair. Evaluation criteria ⊚: Either the foaming amount or the foam breaking property was rated as ⊚ and no x was rated. Good: Both the foam amount and the foam breaking property were evaluated as good. △: Either the foaming amount or the foam breaking property was rated △, and there was no ⊚ or ×. ×: Either the foaming amount or the foam breaking property was evaluated as ×.

[0055] <Storage stability performance test> Each test detergent composition shown in the table below (the units of the numerical values ​​for each component in the table are "mass %") was used in the test.

[0056] Testing Method The mixture was placed in a polypropylene container and allowed to stand at room temperature, after which the appearance was observed. Evaluation criteria ○: Transparent, with no floating matter, sediment or separation. △: Uniform turbidity, no floating matter, sediment or separation. ×: Floating matter, sediment, or separation occurs. ◯ and △ were evaluated as practical.

[0057] <Bacterial sterilization performance test> A 0.5% diluted solution of each test detergent composition shown in the table below (the units of values ​​for each component in the table are "mass %") was prepared using ion-exchanged water, and the disinfecting ability against Escherichia coli and Staphylococcus aureus was tested using the suspension method, and the results were evaluated according to the following criteria. [Test strains] Initial number of E. coli (NBRC12734): 3.6 x 10 7 CFU / ml Staphylococcus aureus (NBRC12732) initial cell count: 5.7 x 10 7 CFU / ml [Contact time / temperature] 5 minutes / 20℃ Evaluation criteria The disinfecting properties were evaluated according to the following evaluation criteria based on the reduction in the number of bacteria after contact with the diluted solution of each test detergent composition, and ◯ was evaluated as being practical. ○: Bacterial count reduction of 5 Log reduction or more. ×: Bacterial count reduction of less than 5 Log reduction.

[0058] [Table 1]

[0059] [Table 2]

[0060] [Table 3]

[0061] [Table 4]

[0062] [Table 5]

[0063] [Table 6]

[0064] [Table 7]

[0065] Comparative Examples 1 to 32 in Tables 1, 3, and 5 above correspond to Examples 1 to 32 in Tables 2, 4, and 6 above, and each test detergent composition in the Comparative Examples was formulated by omitting the component (B) polymer dispersant from the corresponding Example.

[0066] Comparing the Examples and Comparative Examples in Tables 1 to 4 above, it can be seen that the foaming amounts immediately after vigorously shaking and after 30 seconds in the Examples were lower than those in the Comparative Examples. Furthermore, Tables 5 and 6 above show Comparative Examples and Examples containing (D) nonionic surfactant, and it can be seen that the foaming amounts in the Examples were significantly reduced and that they also had excellent foam-breaking properties. Comparing the Examples and Comparative Examples in Tables 1 to 6 above, it can be seen that, particularly when the (A) cationic surfactant was contained in the range of 4.0 to 10.0 mass%, the mass ratio [(A) / (B)] was in the range of 80 to 300, and / or the mass ratio [(A) / (C)] was in the range of 0.6 to 6.0, the foaming amounts were excellent and foam-breaking properties were excellent, resulting in significant foam-suppressing properties.

[0067] The storage stability of Examples 1 to 32 is within the practical range. Furthermore, when comparing Comparative Example 33 in Table 7 above with the Examples in which the disinfecting performance test was carried out, it can be seen that, under the conditions of the present invention, a disinfecting effect cannot be obtained unless a cationic surfactant is contained.

[0068] Comparative Example 33 in Table 7 above is Example 1 without the cationic surfactant (A), and it can be seen that the absence of the cationic surfactant (A) results in no foam-suppressing properties. Comparative Example 34 in Table 7 above is Example 2, where decyldimethylamine oxide (C10), component (C), is replaced with lauryldimethylamine oxide (C12), and it can be seen that an alkyldimethylamine oxide having an alkyl or alkylene group with more than 12 carbon atoms does not provide foam-suppressing properties. Comparative Examples 35 and 36 are Example 22, where the polymer dispersant (B) is replaced with EDTA or GLDA, which are low-molecular-weight sequestering agents having multiple carboxy groups. It can be seen that a low-molecular-weight sequestering agent having multiple carboxy groups does not provide foam-suppressing properties. Comparative Example 37 in Table 7 above is a formulation in which the sodium polyacrylate with a weight-average molecular weight of 15,000 in Example 21 is replaced with sodium polyacrylate with a weight-average molecular weight of 70,000, but it is presumed that products with a larger weight-average molecular weight do not exhibit foam-suppressing properties. [Industrial Applicability]

[0069] The present invention provides a cleaning composition that has disinfecting properties, storage stability, and excellent foam-suppressing properties that inhibit foam accumulation, and is suitable as a cleaning composition for use in, for example, automatic cleaning machines, CIP cleaning, etc.

Claims

1. (A) 0.5 to 25.0 mass% of a cationic surfactant; (B) 0.01 to 0.10 mass% of a polymer dispersant; (C) an alkyldimethylamine oxide having an alkyl group or alkylene group having 8 to 10 carbon atoms.

2. Furthermore, (D) a nonionic surfactant; (E) an alkali metal hydroxide; The cleaning agent composition according to claim 1, wherein the total content of the (C) alkyldimethylamine oxide having an alkyl group or alkylene group with 8 to 10 carbon atoms and the (D) nonionic surfactant [(C) + (D)] does not exceed 25.0 mass% based on the total mass of the cleaning agent composition, and the content of the (E) alkali metal hydroxide is 0.4 to 5.0 mass% based on the total mass of the cleaning agent composition.

3. 3. The cleaning agent composition according to claim 1 or 2, wherein the (A) cationic surfactant is one or more selected from benzalkonium chloride, didecyldimethylammonium methosulfate, dioctyldimethylammonium chloride, and alkyldimethylhydroxyethylammonium chloride, and the (B) polymeric dispersant is one or more compounds having a weight-average molecular weight of 2,000 to 17,000 selected from polyacrylic acid, acrylic acid-maleic acid copolymer, maleic acid-diisobutene copolymer, and salts thereof.

4. 3. The cleaning agent composition according to claim 1 or 2, wherein a mass ratio [(A) / (B)] of the (A) cationic surfactant to the (B) polymer dispersant is 10 to 1,000, and / or a mass ratio [(A) / (C)] of the (A) cationic surfactant to the (C) alkyldimethylamine oxide having an alkyl group or alkylene group having 8 to 10 carbon atoms is 0.1 to 6.

0.

5. 3. The cleaning composition according to claim 2, wherein the nonionic surfactant (D) is at least one selected from the group consisting of polyoxyethylene-polyoxypropylene block polymers and reverse polyoxyethylene-polyoxypropylene block polymers.

6. The cleaning composition according to claim 3, which contains (F) water and is used in an automatic cleaning machine and / or CIP cleaning.

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