Liquid detergent composition and cleaning method using the liquid detergent composition

Abstract

The present invention aims to discover a novel excellent formulation for liquid detergent compositions that can achieve both improved disinfecting power and improved cleaning power. [Solution] The present invention is a liquid detergent composition containing (A) a quaternary ammonium type cationic surfactant represented by the following general formula (I) and (B) a sulfobetaine type surfactant. TIFF2026121231000010.tif35170 [In the formula, R 1 and R 2 These represent, either identically or differently, an alkyl group or alkenyl group having 8 to 18 carbon atoms, and R 3 R represents an alkyl group having 1 to 4 carbon atoms. 4 X represents a hydroxyalkyl group having 1 to 4 carbon atoms, or a polyoxyalkylene group composed of oxyalkylene groups having 1 to 4 carbon atoms with an average number of added moles of 2 to 100, - This indicates an ion selected from halide ions, inorganic acid counterions, and organic acid counterions.

Description

[Technical Field]

[0001] The present invention relates to a liquid detergent composition and a cleaning method using the liquid detergent composition. [Background technology]

[0002] Cleaning agents used in workplaces of food and beverage factories, or in kitchens of restaurants and hotels, require not only high cleaning power against oil but also disinfecting power. Therefore, liquid cleaning agent compositions containing disinfectants such as didecyldimethylammonium chloride (DDAC) have been proposed for use in food factories and the like (Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-65203 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, in recent years, didecyldimethylammonium chloride (DDAC) and benzalkonium chloride (BAC), which are cationic surfactants effective as disinfectants, have become more difficult to manage and handle than before due to stricter regulations both domestically and internationally. Therefore, in order to provide liquid cleaning agents used in food factories and other facilities that are easier to manage and handle, there is a need to develop liquid cleaning agents that use disinfectants that are not subject to these regulations as an alternative.

[0005] This invention has been made in view of the above circumstances, and the object of this invention is to find a new excellent formulation in a liquid detergent composition that can achieve both improved disinfecting power and improved cleaning power. [Means for solving the problem]

[0006] As a result of diligent research aimed at solving the above problems, the inventors unexpectedly discovered that a combination of a specific quaternary ammonium type cationic surfactant, specifically a quaternary ammonium type cationic surfactant represented by the following general formula (I), and a sulfobetaine type surfactant is a formulation that can improve both the disinfecting power and the cleaning power of a liquid detergent composition. [ka] [In the formula, R 1 and R 2 These represent, either identically or differently, an alkyl group or alkenyl group having 8 to 18 carbon atoms, and R 3 R represents an alkyl group having 1 to 4 carbon atoms. 4 X represents a hydroxyalkyl group having 1 to 4 carbon atoms, or a polyoxyalkylene group composed of oxyalkylene groups having 1 to 4 carbon atoms with an average number of added moles of 2 to 100, - This indicates an ion selected from halide ions, inorganic acid counterions, and organic acid counterions.

[0007] More specifically, cationic surfactants, as components possessing antibacterial properties, lack cleaning power against oily stains, leading to the belief that other surfactants needed to be added to enhance cleaning power. However, through diligent research, the inventors discovered that arbitrarily selecting and combining these surfactants did not achieve both improved antibacterial and cleaning power. Surprisingly, they found that a combination of the aforementioned specific quaternary ammonium-type cationic surfactant and sulfobetaine-type surfactant made it possible to achieve both improved antibacterial and cleaning power. The present invention is based on the above findings, and therefore, the gist of the present invention is as follows.

[0008] [1] A liquid detergent composition containing (A) a quaternary ammonium type cationic surfactant represented by the following general formula (I) and (B) a sulfobetaine type surfactant. [ka] [In the formula, R 1 and R 2 are the same or different and each represents an alkyl group or alkenyl group having 8 to 18 carbon atoms, R 3 represents an alkyl group having 1 to 4 carbon atoms, R 4 represents a hydroxyalkyl group having 1 to 4 carbon atoms or a polyoxyalkylene group having an average addition mole number of 2 to 100 and composed of an oxyalkylene group having 1 to 4 carbon atoms, X - represents an ion selected from halide ions, inorganic acid counter ions, and organic acid counter ions.] [2] The liquid detergent composition according to [1], which contains a dialkylmethyl(polyoxyethylene)ammonium salt. [3] The liquid detergent composition according to [1] or [2], which further contains at least one selected from a solvent, a nonionic surfactant, and a hydrotrope. [4] The liquid detergent composition according to any one of [1] to [3], the pH of which is in the range of 6.0 to 14.0. [5] The liquid detergent composition according to any one of [1] to [4], which is for a hard surface. [6] A method for cleaning a hard surface, which foams the liquid detergent composition according to any one of [1] to [5] and uses the foam to clean the hard surface.

[0009] In addition, any two or more of the above [1] to [6] components can be arbitrarily selected and combined. [Advantages of the Invention]

[0010] According to the present invention, by combining and blending a specific quaternary ammonium type cationic surfactant and a sulfobetaine type surfactant in the liquid detergent composition, it is possible to improve the antibacterial power and the detergency of the liquid detergent composition. Therefore, this excellent combination of formulations in the present invention is useful because it facilitates the provision of, for example, a liquid detergent having excellent antibacterial power and detergency. [Modes for Carrying Out the Invention]

[0011] The present invention will be described in detail below. Unless otherwise specified, terms used herein shall be interpreted in the sense commonly used in the art.

[0012] <Liquid detergent composition> The liquid detergent composition of the present invention contains (A) a quaternary ammonium type cationic surfactant represented by the following general formula (I) (also referred to as component (A)) and (B) a sulfobetaine type surfactant (also referred to as component (B)). [ka] [In the formula, R 1 and R 2 These represent, either identically or differently, an alkyl group or alkenyl group having 8 to 18 carbon atoms, and R 3 R represents an alkyl group having 1 to 4 carbon atoms. 4 X represents a hydroxyalkyl group having 1 to 4 carbon atoms, or a polyoxyalkylene group composed of oxyalkylene groups having 1 to 4 carbon atoms with an average number of added moles of 2 to 100, - This indicates an ion selected from halide ions, inorganic acid counterions, and organic acid counterions.

[0013] The liquid detergent composition of the present invention achieves both improved disinfecting power and improved cleaning power through the excellent combination of the above-mentioned specific quaternary ammonium-type cationic surfactant and sulfobetaine-type surfactant.

[0014] [(A) component] The liquid detergent composition of the present invention contains a quaternary ammonium type cationic surfactant having a specific structure, specifically a quaternary ammonium type cationic surfactant represented by the following general formula (I).

[0015] [ka]

[0016] In the above formula, R 1 and R 2 These represent, either identically or differently, an alkyl group or alkenyl group having 8 to 18 carbon atoms, and R 3 R represents an alkyl group having 1 to 4 carbon atoms. 4 X represents a hydroxyalkyl group having 1 to 4 carbon atoms, or a polyoxyalkylene group composed of oxyalkylene groups having 1 to 4 carbon atoms with an average number of added moles of 2 to 100, - This indicates an ion selected from halide ions, inorganic acid counterions, and organic acid counterions.

[0017] In general formula (I), R 1 and R 2 Preferably, it is an alkyl group or alkenyl group having 8 to 14 carbon atoms, more preferably an alkyl group or alkenyl group having 8 to 12 carbon atoms, and even more preferably an alkyl group or alkenyl group having 8 to 10 carbon atoms. 3 Preferably, it is an alkyl group having 1 to 3 carbon atoms, and more preferably, an alkyl group having 1 to 2 carbon atoms. 4 Preferably, is a hydroxyalkyl group having 1 to 3 carbon atoms, more preferably a hydroxyalkyl group having 1 to 2 carbon atoms, or preferably a polyoxyalkylene group composed of an oxyalkylene group having 1 to 3 carbon atoms, more preferably a polyoxyalkylene group composed of an oxyalkylene group having 1 to 2 carbon atoms. 4 The average number of added moles of polyoxyalkylene groups is preferably 2 or more and 10 or less, and more preferably 2 or more and 5 or less.

[0018] In the present invention, the above-mentioned specific quaternary ammonium type cationic surfactant is incorporated into the liquid detergent composition to impart antibacterial properties.

[0019] In the present invention, suitable examples of the specific quaternary ammonium type cationic surfactants include, for example, dialkyl(C8-C16)methyl(polyoxyethylene)ammonium salt (average number of EO added moles 1-100), dialkyl(C8-C16)ethyl(polyoxyethylene)ammonium salt (average number of EO added moles 1-100), and among these, dialkyl(C8-C10)methyl(polyoxyethylene)ammonium salt (average number of EO added moles 1-10) is more preferably used.

[0020] Specifically, the following commercially available products can be used as the above-mentioned specific quaternary ammonium type cationic surfactants: Arcsarda's Bardap26 (didecylmethyl(polyoxyethylene)ammonium salt (EO1-5 molar adduct)), Takemoto Oil & Fat Co., Ltd.'s Takesurf B-0012-H (dialkylmethyl(polyoxyethylene)ammonium salt (EO1-2 molar adduct)), etc.

[0021] In the liquid detergent composition of the present invention, a specific quaternary ammonium type cationic surfactant may be used alone or in combination of multiple types.

[0022] The content of a specific quaternary ammonium type cationic surfactant in the liquid detergent composition of the present invention is not particularly limited as long as the effects of the present invention are achieved, and an appropriate amount can be added. From the viewpoint of disinfecting power, the lower limit of the content of the specific quaternary ammonium type cationic surfactant is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and even more preferably 0.01% by mass or more. Furthermore, from the viewpoint of formulation stability, the upper limit of the content of the specific quaternary ammonium type cationic surfactant is preferably 25% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less. The numerical range of the content of the specific quaternary ammonium type cationic surfactant is preferably 0.001% by mass or more and 25% by mass or less, more preferably 0.005% by mass or more and 20% by mass or less, and even more preferably 0.01% by mass or more and 15% by mass or less.

[0023] [(B) Component] The liquid detergent composition of the present invention contains a sulfobetaine-type surfactant.

[0024] Here, the sulfobetaine-type surfactant is specifically a compound represented by the following general formula (II), and a wide range of compounds known in the art can be used. [ka]

[0025] In the above formula, R 5 R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, 6 R is an alkylene group having 1 to 6 carbon atoms, A is a group selected from -COO-, -CONH-, -OCO-, -NHCO-, and -O-, and m is the number 0 or 1. 7 and R 8 These are the same or different alkyl groups or hydroxyalkyl groups, each having 1 to 3 carbon atoms, and R 9 is an alkylene group having 1 to 5 carbon atoms which may be substituted with a hydroxyl group, and B is -SO3 - , -OSO3 - It is a base selected from among them.

[0026] In general formula (II), R 5 Preferably, it is an alkyl group or alkenyl group having 8 to 16 carbon atoms, more preferably an alkyl group or alkenyl group having 8 to 14 carbon atoms, and even more preferably an alkyl group or alkenyl group having 10 to 14 carbon atoms. 6 is preferably an alkylene group having 1 to 4 carbon atoms, and more preferably an alkylene group having 2 to 4 carbon atoms. A is preferably a group selected from -CONH-, -NHCO-, and -O-. m is preferably 0. R 7 and R 8Preferably, R is an alkyl group or hydroxyalkyl group having 1 to 2 carbon atoms, and more preferably a hydroxyalkyl group having 1 to 2 carbon atoms. 9 Preferably, this is an alkylene group having 1 to 4 carbon atoms that may be substituted with a hydroxyl group, and more preferably, an alkylene group having 1 to 3 carbon atoms that may be substituted with a hydroxyl group.

[0027] In the present invention, sulfobetaine-type surfactants are incorporated into the liquid detergent composition to impart cleaning power.

[0028] In the present invention, the sulfobetaine-type surfactant can be, for example, alkyl sulfobetaines such as lauryl sulfobetaine and myristyl sulfobetaine, or alkyl hydroxysulfobetaines such as lauryl hydroxysulfobetaine, myristyl hydroxysulfobetaine, and cocamidopropyl hydroxysulfobetaine, and among these, alkyl hydroxysulfobetaine can be preferably used.

[0029] Specifically, the following commercially available products can be used as sulfobetaine-type surfactants: for example, Amphorex LSB (lauryl hydroxysulfobetaine) from Miyoshi Oil & Fat Co., Ltd., Amhitol 20HD (lauryl hydroxysulfobetaine) from Kao Corporation, AKTAINE LHS-45 (lauryl hydroxysulfobetaine) and AKTAINE CAHS-50N (cocamidopropyl hydroxysulfobetaine) from KCI Corporation, and lauryl sulfobetaine and myristyl sulfobetaine from Tokyo Chemical Industry Co., Ltd.

[0030] In the liquid detergent composition of the present invention, the sulfobetaine-type surfactant may be used alone or in combination of multiple types.

[0031] The content of sulfobetaine-type surfactant in the liquid detergent composition of the present invention is not particularly limited as long as the effects of the present invention are achieved, and an appropriate amount can be added. From the viewpoint of cleaning power, the lower limit of the sulfobetaine-type surfactant content is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and even more preferably 0.007% by mass or more. Furthermore, from the viewpoint of the formulation stability of the detergent, the upper limit of the sulfobetaine-type surfactant content is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less. The numerical range of the sulfobetaine-type surfactant content is preferably 0.001% by mass or more and 20% by mass or less, more preferably 0.005% by mass or more and 15% by mass or less, and even more preferably 0.007% by mass or more and 10% by mass or less.

[0032] The mass ratio [(A) / (B)] of (A) a specific quaternary ammonium type cationic surfactant and (B) a sulfobetaine type surfactant in the liquid detergent composition of the present invention is not particularly limited and can be adjusted as appropriate, but is preferably 0.01 to 100, more preferably 0.1 to 10, even more preferably 0.5 to 5, and particularly preferably 0.75 to 2.

[0033] [Solvents, nonionic surfactants, hydrotropes] The liquid detergent composition of the present invention preferably further contains, in addition to the above components, at least one selected from a solvent, a nonionic surfactant, and a hydrotrope. These components are preferably added as solubilizing components to improve formulation stability when the liquid detergent is used or stored for a long period of time, because certain combinations of quaternary ammonium type cationic surfactants and sulfobetaine type surfactants can become cloudy or separate if left as is, and if left as is, changes in composition from the initial state during use can be problematic.

[0034] (solvent) In the liquid detergent composition of the present invention, any solvent known in the art can be used without particular limitation. Specifically, for example, 3-methoxy-3-methyl-1-butanol, glycerin, diglycerin, triglycerin, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, methyl glycol, methyl diglycol, methyl triglycol, isopropyl glycol, isopropyl diglycol, isopropyl triglycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, isobutyl triglycol, butyl diglycol acetate, hexyl glycol, hexyl diglycol, hexyl triglycol, 2-ethylhexyl glycol, 2-ethylhexyl diglycol, 2-ethylhexyl Solvents such as triglycol, allyl glycol, phenyl glycol, phenyl diglycol, benzyl glycol, benzyl diglycol, methylpropylene glycol, methylpropylene diglycol, methylpropylene triglycol, propylpropylene glycol, propylpropylene diglycol, butylpropylene glycol, butylpropylene diglycol, butylpropylene triglycol, phenylpropylene glycol, phenylpropylene diglycol, methylpropylene glycol acetate, dimethyl glycol, dimethyl diglycol, dimethyl triglycol, methyl ethyl diglycol, dibutyl diglycol, dimethyl pyroprediglycol, and octyl butyl triglycol can be used. Among these, butyl diglycol, 3-methoxy-3-methyl-1-butanol, and 2-ethylhexyl diglycol can be suitably used. In the liquid detergent composition of the present invention, the solvent may be used alone or in combination of multiple types.

[0035] (Nonionic surfactant) In the liquid detergent composition of the present invention, any nonionic surfactant known in the art can be used without particular limitation. Specifically, for example, polyoxyethylene-polyoxypropylene condensates such as Pluronic® type block polymer, reverse Pluronic® type block polymer, Tetronic type block polymer, and reverse Tetronic type block polymer; polyoxyalkylene alkyl ethers such as polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, and polyoxyethylene-polyoxypropylene alkyl ether; polyoxyethylene alkylphenyl ether, polyoxyethylene styrene-phenyl ether; alkyl monoglycoside, alkyl polyglycoside; polyoxyethylene alkylamine, polyoxyethylene polyoxypropylene alkylamine; glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, alkylglycerol, polyglycerin alkyl ether, and alkyl glucamide can be used. In particular, alkyl monoglycosides (e.g., coconut alkyl monoglycosides), alkyl polyglycosides (e.g., coconut alkyl polyglycosides), and polyoxyalkylene alkyl ethers (e.g., polyoxyethylene polyoxypropylene tridecyl ethers and polyoxyethylene branched nonyl ethers) can be suitably used. In the liquid detergent composition of the present invention, the nonionic surfactant may be used alone or in combination of multiple types.

[0036] (Hydrotrope) In the liquid detergent composition of the present invention, the hydrotrope agent can be any known agent in the art without particular limitation. Specifically, for example, benzoic acid and its salts, xylene sulfonic acid and its salts, cumene sulfonic acid and its salts, toluene sulfonic acid and its salts, etc., can be used. In the liquid detergent composition of the present invention, the hydrotrope agent may be used alone or in combination of multiple agents.

[0037] In addition to the components mentioned above, the liquid cleaning composition of the present invention may optionally contain surfactants (e.g., nonionic surfactants, amphoteric surfactants, cationic surfactants, anionic surfactants), alkaline agents (e.g., sodium hydroxide, potassium hydroxide, etc.), polymer dispersants, chelating agents, enzymes, dyes, solvents, defoaming agents, bleaching agents, bleaching activators, antioxidants, disinfectants, fragrances, rust inhibitors (also called metal corrosion inhibitors), preservatives, pH adjusters, etc., as long as the effects of the present invention are achieved. However, in the liquid cleaning composition of the present invention, for example, anionic surfactants may be omitted because they may reduce the disinfecting power of cationic surfactants.

[0038] Here, among the above components, the alkaline agent can be suitably included when it is necessary to improve the decomposition or solubilization action against protein stains, for example. Specifically, the alkaline agent may be alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkaline earth metal hydroxides such as magnesium hydroxide; carbonates such as sodium carbonate and potassium carbonate; bicarbonates such as sodium bicarbonate and potassium bicarbonate; silicates such as sodium silicate and potassium silicate; or alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, 2-amino-2-ethyl-1,3-propanediol, trishydroxymethylaminomethane, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, tetrahydroxypropylethylenediamine, ethylenediaminetetraacetic acid (EDTA), or hydroxyethylethylenediamine. Salts of triacetic acid (HEDTA), nitrilotriacetic acid (NTA), triethylenetetraaminehexaacetic acid (TTHA), 1,3-propanediaminetetraacetic acid (PDTA), 1,3-diamino-2-hydroxypropanetetraacetic acid (DPTA-OH), dihydroxyethylglycine (DHEG), glycol etherdiaminetetraacetic acid (GEDTA), 3-hydroxy-2,2-iminodisuccinic acid (HIDS), alanine diacetic acid, diethylenetriaminepentaacetic acid (DTPA), 2-phosphonobutane-1,2,4-tricarboxylic acid, ethylenediaminedisuccinic acid (EDDS), hydroxyethyliminodiacetic acid (HIDA), glutamic acid diacetic acid (GLDA), methylglycine diacetic acid (MGDA), aspartic acid diacetic acid (ASDA), tripolyphosphate, citric acid, malic acid, gluconic acid, diethylglutaric acid, phytic acid, etc. can be used. Among these, sodium hydroxide and potassium hydroxide can be preferably used. In the detergent composition of the present invention, the alkaline agent may be used alone or in combination of multiple types.

[0039] The liquid detergent composition of the present invention contains, for example, water as the remainder of the components other than those mentioned above. The water contained in the liquid detergent composition of the present invention is not particularly limited and includes, for example, tap water, ion-exchanged water, purified water, distilled water, pure water, soft water, hard water, etc.

[0040] The liquid detergent composition of the present invention can be manufactured by mixing the above-mentioned components by conventional methods.

[0041] [pH] The pH of the liquid detergent composition of the present invention is not particularly limited, but for example, the pH at 25°C is 6.0 to 14.0, preferably 6.0 to 11.5, and more preferably 6.0 to 8.0.

[0042] [Items to be washed] The liquid cleaning agent composition of the present invention can be suitably used, for example, to clean various hard surfaces (i.e., it is for hard surface cleaning). The liquid cleaning agent composition of the present invention is preferably used to clean hard surfaces of various items such as dishes, containers, cooking utensils, kitchen appliances, ventilation fans, ranges, ovens, sinks, floors, walls, etc., in workplaces and kitchens of food factories, beverage factories, restaurants, hotels, supermarkets, etc., or in household kitchens, etc. Examples of hard surface materials include hard resin surfaces such as plastics, metal surfaces such as stainless steel and iron, ceramic surfaces such as tiles, and combinations thereof. In addition, it is preferably used to clean hard surfaces of medical instruments (for example, steel instruments such as scissors, forceps, and tweezers, resin instruments such as catheters, tubes, and bite blocks, rigid or flexible endoscopes, etc.).

[0043] [For cleaning purposes] The liquid cleaning agent composition of the present invention is preferably used, for example, for foam cleaning, spray cleaning, immersion cleaning, and manual cleaning. In particular, it is preferably used for foam cleaning and immersion cleaning applications.

[0044] However, the liquid cleaning agent composition of the present invention is not limited to the above-mentioned uses for foam cleaning, spray cleaning, immersion cleaning, and manual cleaning, but can also be used for ultrasonic cleaning, jet cleaning, etc.

[0045] <Foaming cleaning method> A method for cleaning hard surfaces using one liquid cleaning agent composition of the present invention is characterized by foaming the liquid cleaning agent composition of the present invention and using it to clean the hard surface to be cleaned, with no other steps or conditions being limited (this method will also be referred to as the foaming cleaning method below). The description of the liquid cleaning agent composition of the present invention described above can be used to explain this cleaning method.

[0046] In the foaming cleaning method of the present invention, foaming of the liquid cleaning agent composition is performed, for example, by filling a sprayer with the liquid cleaning agent composition or a diluted solution and then spraying it in a foamy manner onto a hard surface that is to be cleaned.

[0047] In the foaming cleaning method of the present invention, when a diluent is used, the dilution ratio of the liquid detergent composition is, for example, 1 to 10,000 times, preferably 1 to 5,000 times, and more preferably 1 to 1,000 times. A diluent can be prepared by diluting the liquid detergent composition with water at such a ratio.

[0048] In the foaming cleaning method of the present invention, the hard surface can be cleaned by spraying the liquid cleaning agent composition in a foamy form onto the hard surface, then scrubbing it with, for example, a brush or sponge, and then rinsing or wiping the hard surface.

[0049] In addition, in the foaming cleaning method of the present invention, it is also preferable to spray the liquid cleaning agent composition onto a hard surface in a foamy form and then leave it for a certain period of time, for example, 30 seconds to 60 minutes.

[0050] <Immersion cleaning method> A method for cleaning hard surfaces using one liquid cleaning agent composition of the present invention is characterized by immersing an article having a hard surface, which is the object to be cleaned, in a diluted solution of the liquid cleaning agent composition of the present invention, with no other steps or conditions being limited (this method will also be referred to as the immersion cleaning method below). The description of the liquid cleaning agent composition of the present invention described above may be used to explain this cleaning method.

[0051] In the immersion cleaning method of the present invention, the dilution ratio of the diluted liquid detergent composition is, for example, 2 to 10,000 times, preferably 2 to 5,000 times, and more preferably 2 to 1,000 times. The diluted solution can be prepared by diluting the liquid detergent composition with water at such a ratio.

[0052] In the immersion cleaning method of the present invention, the time for immersing an article having a hard surface, which is the object to be cleaned, in the diluent is, for example, 60 minutes or less, preferably 10 minutes or less, and more preferably 1 minute or less.

[0053] In addition, in the immersion cleaning method of the present invention, for example, the hard surface of the object to be cleaned may be scrubbed using a sponge or the like during immersion. [Examples]

[0054] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

[0055] Liquid detergent compositions having the compositions shown in Tables 1-3 below were prepared, and the following tests were conducted. The components used in the formulation are listed below. In Tables 1-3 below, the pH (25°C) of the detergent compositions was adjusted by adding an appropriate amount of pH adjusting agent (hydrochloric acid / sodium hydroxide) (however, in Example 9, the pH was set to 13 or higher using an alkaline agent). The residue is water. In the following, "%" represents mass percentage unless otherwise specified. Also, the values ​​in parentheses in Tables 1-3 are the values ​​converted to pure content.

[0056] [Ingredients] <Cationic surfactant> • 70% didecylmethyl(polyoxyethylene)ammonium salt (EO1-5 molar adduct): Trade name "Bardap26", manufactured by Arcsarda. • 85% dioctyl(dimethyl)ammonium salt: Product name "BardacLF-80", manufactured by Arcsarda. • 75% alkyl(C8~C18) bis(2-hydroxyethyl)methylammonium salt: Product name "Liposocard C / 12", manufactured by Lion Specialty Chemicals. • 50% benzalkonium chloride: Product name "Cation F2-50R", manufactured by NOF Corporation. <Amphoteric surfactants> • 30% Lauryl Betaine: Product name "Licabion A-100", manufactured by Shin Nippon Rika Co., Ltd. • 30% Lauryl Amidopropyl Betaine: Product name "Amphorex LB-2", manufactured by Miyoshi Oil & Fat Co., Ltd. • 30% Lauryl Hydroxysulfobetaine: Product name "Amphorex LSB", manufactured by Miyoshi Oil & Fat Co., Ltd. <Nonionic surfactants> • 50% coconut alkyl polyglycoside: Product name "Glucopon650EC", manufactured by BASF. • Polyoxyethylene polyoxypropylene tridecyl ether: Product name "Brownon S-800", manufactured by Aoki Oil & Fat Industry Co., Ltd. • Polyoxyethylene branched nonyl ether: Trade name "ETHYLAN 1003", manufactured by Nurion. <Solvent> • Butyl diglycol: Product name "BDG-S", manufactured by Nippon Emulsifier Co., Ltd. • 3-Methoxy-3-methyl-1-butanol: Product name "Solfit Fine Grade", manufactured by Kuraray Co., Ltd. • 2-Ethylhexyl diglycol: Trade name "EHDG", manufactured by Nippon Emulsifier Co., Ltd. <Alkaline agent> • Sodium hydroxide: Manufactured by Tosoh Corporation

[0057] [Scrubbing cleaning power test] <Cleaning Sample> Model stain 1 was prepared by mixing beef tallow and soybean oil in a 1:1 ratio and adding 3% carbon black. 0.5g of this Model Stain 1 was placed on a vinyl chloride tile (manufactured by Toli Corporation) and used as a cleaning sample. <Cleaning method> One mL of a 10-fold diluted solution of each liquid cleaning agent composition was applied to the model stain 1 described above, and it was scrubbed 10 times with a sponge. After scrubbing, the removal rate of model stain 1 was visually evaluated. The evaluation criteria are as follows. ○: Removal rate of 90% or more ×: Removal rate less than 90%

[0058] [Disinfectant Power Test] <Test bacteria> Escherichia coli ATCC 11229 was used as the bacterial strain. The Escherichia coli was cultured on SCD agar at 35°C for 24 hours, and the cultured Escherichia coli was divided into 10 7 ~10 9 The test bacterial suspension was prepared by suspending the bacteria in physiological saline to a concentration of CFU / mL and then adding it to peptone buffer.

[0059] <Testing Method> 0.1 mL of the test bacterial suspension was added to 10 mL of a 10-fold dilution of each liquid detergent composition, and the mixture was stirred for 30 seconds to allow each liquid detergent composition to act on the test bacterial suspension. Then, 1 mL of this mixture of the test bacterial suspension and liquid detergent composition was poured into 9 mL of LP medium to stop the action. Subsequently, the above mixture and 1 mL of the LP medium were poured into 20 mL of SCDLP agar medium and incubated at 35°C for 24 hours, and the number of E. coli colonies after incubation was counted (B). On the other hand, as a control, 0.1 mL of the test bacterial suspension was added to 10 mL of desalinated water, and the mixture was stirred for 30 seconds. Then, 1 mL of this mixture of the test bacterial suspension and desalinated water was poured into 9 mL of LP medium. Subsequently, the above mixture and 1 mL of the LP medium were poured into 20 mL of SCDLP agar medium and incubated at 35°C for 24 hours, and the number of E. coli colonies after incubation was counted (A). The sterilization rate was calculated by determining the ratio of the number of colonies after each liquid detergent composition was applied to the test bacterial solution to the number of colonies of the control using the following formula. <Calculation formula> Sterilization rate (%)={(AB) / A}×100 A: Number of control colonies (CFU / mL) B: Colony count after contact (CFU / mL)

[0060] The sterilization rate (%) was evaluated according to the following criteria. ○: The sterilization rate (%) is 99% or higher. ×: The sterilization rate (%) is less than 99%.

[0061] [Appearance stability test] Each liquid detergent composition was prepared as described above and then stored at 40°C for one day. After storage, the appearance was visually observed and its appearance stability was evaluated. The evaluation criteria are as follows. ○: It was transparent. ×: Cloudiness and separation were present.

[0062] [Immersion Washing Test] <Cleaning Sample> Model stain 2 was prepared by mixing beef tallow and soybean oil in a 1:1 ratio and adding 0.01% of Zudan III (staining solution). After heating and dissolving Model stain 2, 0.05g of Model stain 2 was applied to a stainless steel plate (SUS304) and left to stand at 25°C for 1 hour to solidify, which was then used as the cleaning sample.

[0063] <Cleaning method> The above cleaning samples were immersed in each cleaning agent composition. Specifically, a 10-fold dilution of each liquid cleaning agent composition was prepared, and the above cleaning samples were immersed in the 10-fold dilution (25°C). After standing for 5 minutes at 25°C, the removal rate of Model Stain 2 was visually evaluated. The evaluation criteria are as follows. ○: Removal rate of 50% or more ×: Removal rate less than 50%

[0064] [Foaming test] The undiluted liquid detergent composition was sprayed five times into a 100 mL measuring glass using a commercially available trigger-type sprayer (discharge volume 1 g) to generate foam. The foam height was read from the measuring glass's markings to evaluate foaming ability. The evaluation criteria are as follows: ○: Foam height is 10 mL or more ×: Foam height less than 10mL

[0065] The results of the scrubbing cleanliness test and the disinfecting power test are shown in Table 1.

[0066] [Table 1]

[0067] As shown in Table 1, Example 1 is a liquid detergent composition formulated by combining dialkylmethyl(polyoxyethylene)ammonium salt and lauryl hydroxysulfobetaine, and both its antibacterial and scrubbing power were improved. In contrast, when lauryl hydroxysulfobetaine was combined with other quaternary ammonium type cationic surfactants (Comparative Examples 1-3), or when dialkylmethyl(polyoxyethylene)ammonium salt was combined with other amphoteric surfactants (Comparative Examples 4 and 5), while the antibacterial power was improved by the quaternary ammonium type cationic surfactant, no improvement in cleaning power was observed due to the amphoteric surfactant. Therefore, it was found that by combining a specific quaternary ammonium type cationic surfactant (dialkylmethyl(polyoxyethylene)ammonium salt) with a sulfobetaine type surfactant, improvements in both the antibacterial and cleaning power of the liquid detergent composition can be achieved.

[0068] Next, the results of the immersion cleaning power test and foaming test are shown in Table 2.

[0069] [Table 2]

[0070] As shown in Table 2, the liquid detergent composition of Example 1 was found to have excellent immersion cleaning power and foaming ability. Furthermore, it was found that this effect is unique to the combination of a specific quaternary ammonium type cationic surfactant (dialkylmethyl(polyoxyethylene)ammonium salt) and a sulfobetaine type surfactant, and is a superior effect not found in other combinations. For this reason, it was found that the liquid detergent of the present invention can be suitably used, for example, for immersion cleaning and / or foaming cleaning.

[0071] Next, the results of the formulation stability test are shown in Table 3. The results of the scrubbing power test, disinfecting power test, immersion power test, and foaming test are also shown.

[0072] [Table 3]

[0073] As shown in Tables 1 and 2, it was found that when a specific quaternary ammonium cationic surfactant (dialkylmethyl(polyoxyethylene)ammonium salt) and a sulfobetaine-type surfactant are combined, improvements in the disinfecting power and cleaning power of the liquid detergent composition can be achieved, and further improvements in immersion cleaning power and foaming performance can also be expected. On the other hand, as shown in Table 3, this combination has poor formulation stability (Example 1), so when using or storing the detergent for a long period of time, it is effective to ensure formulation stability by adding nonionic surfactants or solvents. In fact, as shown in Examples 2 to 8 in Table 3, it was found that formulation stability can be improved while maintaining the effect of the combination by adding nonionic surfactants or solvents. In addition, while alkaline agents are sometimes added to detergent compositions to improve the decomposition and solubilization of protein stains, it was also shown that alkaline agents can be optionally added to the detergent composition of the present invention, as is clear from Example 9 in Table 3.

[0074] From the above, it was found that a combination of a specific quaternary ammonium cationic surfactant (dialkylmethyl(polyoxyethylene)ammonium salt) and a sulfobetaine-type surfactant can improve the disinfecting power and cleaning power of liquid detergent compositions. Furthermore, this combination was found to be excellent in immersion cleaning power and foaming performance. Although this combination has poor formulation stability, it was found that this can be resolved by incorporating nonionic surfactants or solvents. [Industrial applicability]

[0075] According to the present invention, by combining a specific quaternary ammonium-type cationic surfactant and a sulfobetaine-type surfactant in a liquid detergent composition, it is possible to improve both the antibacterial power and the cleaning power of the liquid detergent composition. Therefore, this excellent combination of formulations in the present invention is useful because it facilitates the provision of liquid detergents having excellent antibacterial and cleaning power, for example.

Claims

1. A liquid detergent composition comprising (A) a quaternary ammonium type cationic surfactant represented by the following general formula (I) and (B) a sulfobetaine type surfactant. 【Chemistry 1】 [In the formula, R １ and R ２ These represent, either identically or differently, an alkyl group or alkenyl group having 8 to 18 carbon atoms, and R ３ R represents an alkyl group having 1 to 4 carbon atoms. ４ X represents a hydroxyalkyl group having 1 to 4 carbon atoms, or a polyoxyalkylene group composed of oxyalkylene groups having 1 to 4 carbon atoms with an average addition mole of 2 to 100. － This indicates an ion selected from halide ions, inorganic acid counterions, and organic acid counterions.

2. (A) The liquid detergent composition according to claim 1, comprising a dialkylmethyl(polyoxyethylene)ammonium salt.

3. The liquid detergent composition according to claim 1, further comprising at least one selected from a solvent, a nonionic surfactant, and a hydrotrope.

4. The liquid detergent composition according to claim 1, wherein the pH is in the range of 6.0 to 14.

0.

5. A liquid cleaning agent composition according to any one of claims 1 to 4, for use on hard surfaces.

6. A method for cleaning a hard surface, comprising foaming the liquid cleaning agent composition described in claim 1 and using it to clean the hard surface.

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