JP5631726B2 - Liquid detergent composition - Google Patents

Description

  The present invention relates to a liquid detergent composition. In particular, the present invention relates to a liquid detergent composition used for washing food processing equipment and / or cooking equipment.

  In food processing factories and beverage factories, food and beverages are produced using equipment such as food processing equipment and beverage filling machines. In these factories, when the production schedule is interrupted, a process for cleaning and removing food stains and beverage stains is periodically provided to ensure the sanitary condition of equipment and facilities. In addition, daily washing of cooking facilities is indispensable also in cooking places such as restaurants and supermarkets. When washing such food processing equipment and cooking equipment, the scale of the washing object is large, or there are places that are difficult to rub due to the structure of the equipment. Foam cleaning is used in which the agent is foamed and foamed and applied to the object to be cleaned.

  In foam cleaning, a diluted solution obtained by diluting the cleaning composition 5 to 200 times with water is put into an injection device, and bubbles generated by water pressure or air pressure are sprayed and adhered to equipment or equipment to be cleaned. In the case of cleaning and sterilization by rubbing with a brush or sponge after holding for a certain period of time or rinsing with water without rubbing, or by putting the cleaning composition into the injection device as a stock solution, The case of mixing and foaming with water and spraying and adhering to the object to be cleaned can be mentioned. In such foam cleaning, by applying the cleaning agent in the form of foam, the residence time in the object to be cleaned becomes longer, and the cleaning / sterilizing effect is improved. Further, in the contact cleaning with foam, since the spraying condition of the cleaning agent can be visually confirmed, there is an advantage that the processing portion can be easily identified and unnecessary scattering of the cleaning agent can be suppressed.

  Patent Document 1 discloses a quaternary ammonium salt system as a cleaning composition for cleaning equipment and equipment used for food processing and / or cooking (that is, food processing equipment and / or cooking equipment) by foam cleaning. Disinfectant cleaning compositions containing disinfectants such as disinfectants, alkali metal silicates, and polyoxyalkylene alkyl ethers are disclosed, and Patent Document 2 discloses alkylamine quaternized compounds, biguanide compounds, and the like. A disinfectant and a disinfectant cleaning composition containing silicate are disclosed.

  Moreover, as a cleaning agent for cleaning equipment such as a floor, Patent Document 3 discloses a cleaning agent containing an amine oxide type surfactant and a fatty acid salt, and exhibits excellent foaming properties. As a composition, Patent Document 4 discloses a detergent composition containing a higher fatty acid salt, an amine oxide type surfactant and a water-soluble polymer.

  Further, as a cleaning agent suitably used for cleaning vertical surfaces and inclined surfaces, Patent Document 5 discloses a liquid bleaching agent composition containing an amine oxide type surfactant, a fatty acid salt, and an anionic organic polymer. Patent Document 6 discloses a thickened bleaching composition containing an amine oxide type surfactant and an anionic polymer.

JP 2004-231594 A JP 2004-189874 A JP 2003-238990 A JP 2004-204087 A JP-A-6-184594 Special table 2008-531839 gazette

  The cleaning composition used for washing food processing equipment and / or cooking equipment is not only suitable for washing and sterilization, but also suitable for foaming and washing. It is required to have excellent foam stability. With regard to conventional food processing equipment and / or cooking equipment cleaning compositions, development has been focused on foaming and foam stability, including the techniques described in Patent Document 1 and Patent Document 2, Many conventional detergent compositions for food processing equipment and / or cooking equipment have achieved sufficient foaming properties and foam stability. On the other hand, these conventional cleaning compositions for food processing equipment and / or cooking equipment are economically disadvantageous because the foam does not easily break during rinsing and a large amount of rinsing water must be used for rinsing. Also, the work load becomes large (work takes time), and it is also disadvantageous in terms of environmental load. However, the foamability / foam stability at the time of washing and the foamability at the time of rinsing are in a trade-off relationship, and it has been very difficult to satisfy both performances at the same time.

  The present inventors have used a fatty acid and / or a salt thereof in a specific quantitative ratio in combination with an amine oxide-type surfactant exhibiting high foaming properties (see, for example, Patent Document 4). It has been found that the foamability / foam stability can be compatible with the foamability during rinsing. However, on the other hand, it has also been found that when an amine oxide type surfactant and a fatty acid and / or a salt thereof are used in combination, the viscosity of the liquid detergent is remarkably increased. With regard to cleaning agents used for cleaning food processing equipment and / or cooking equipment, particularly when using an automatic feeder, the liquid cleaning agent is mixed with tap water in the apparatus by sucking up the liquid cleaning agent with a pump or the like. If the viscosity is high, it is difficult to suck up and the handleability is significantly reduced. In addition, when the liquid cleaning agent is put into a container as it is and mixed with tap water, a scene where it is difficult to discharge is assumed. In this case, it is conceivable to use a viscosity reducing agent in combination. However, when a normal solvent or hydrotrope is used, there is a problem that the foamability / foam stability during cleaning is impaired.

  Patent Document 3 and Patent Document 4 disclose a technique in which an amine oxide surfactant and a fatty acid salt are used in combination, but there is no suggestion about a means for solving the problem of viscosity increase in the composition. Further, the techniques described in Patent Document 5 and Patent Document 6 relate to a sufficiently thickened aqueous solution composition (thickened bleaching composition) and, of course, solve the problem of viscosity increase in the blend composition. It does not suggest the means to do.

  An object of the present invention is to provide a liquid detergent composition having a reduced viscosity and excellent handleability. It is another object of the present invention to provide a liquid detergent composition that exhibits excellent foamability / foam stability at the time of washing and excellent foaming properties at the time of rinsing.

  As a result of intensive investigations on the above problems, the present applicant has found that an olefin having 4 to 8 carbon atoms in a system containing an amine oxide surfactant and a fatty acid (or a salt thereof) in a specific ratio / specific amount. It has been found that by using a copolymer of maleic acid or a copolymer of styrene and maleic acid, a liquid detergent composition having reduced viscosity and excellent handleability can be realized. The present inventors have found that it is possible to realize a liquid detergent composition that achieves both foamability / foam stability and foamability during rinsing. The present invention has been completed.

That is, the present invention
(A) 0.5 to 10% by mass of one or more compounds selected from fatty acids having 8 to 14 carbon atoms and salts thereof (however, in the case of containing a fatty acid salt, the converted amount as a fatty acid),
(B) 0.5 to 19.5% by mass of an amine oxide type surfactant having one hydrocarbon group having 8 to 16 carbon atoms, and
(C) Copolymer of maleic acid and one kind selected from olefins having 4 to 8 carbon atoms and styrene
Containing
The mass ratio of (a) component / (b) component is 1/10 to 10/1,
The total content of the component (a) and the component (b) is 4 to 20% by mass, and
The mass ratio of (c) component / [(a) component + (b) component] is 1/100 to 2.5 / 1.
It is related with the liquid detergent composition which is.

  According to the present invention, a liquid detergent composition having a reduced viscosity and excellent handleability is provided. Furthermore, there is provided a liquid detergent composition that exhibits excellent foamability / foam stability during washing and excellent foaming properties during rinsing.

  Before discussing in detail the configuration of the present invention, note the meaning of the following terms. That is, in the present invention, the term “food processing equipment and / or cooking equipment” refers to equipment used when processing food and beverages at food processing factories and beverage factories and / or when cooking foods at cooking sites and Means equipment. Examples of such devices include a net conveyor, a freezer, a slicer, a rice mill, and a beverage filling machine. Examples of such facilities include a floor, a wall, and a work table.

  The liquid detergent composition of the present invention contains the following components (a) to (c).

<(A) component>
The component (a) is one or more compounds selected from fatty acids having 8 to 14 carbon atoms and salts thereof. Examples of suitable component (a) include caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, and salts thereof. Among them, lauric acid is used to contribute to foaming properties during rinsing. , Myristic acid, and salts thereof are preferred. Here, examples of the salt include alkali metal salts, among which sodium salts and potassium salts are preferable.

  By setting the content of the component (a) in the liquid detergent composition of the present invention to 0.5% by mass or more, it is possible to realize good foaming property at the time of rinsing, and the foam at the time of washing 10 mass% or less is preferable from a stability viewpoint. From the viewpoint of realizing foam stability at the time of washing and good foaming property at the time of rinsing, the content of the component (a) is 0.5 to 10% by mass, more preferably 1.0 to 10% by mass. More preferably, it is 2.5-8 mass%, Most preferably, it is 3-5 mass%. Here, the said content is a value which used the conversion amount as a fatty acid, when a fatty acid salt is contained in (a) component.

<(B) component>
The component (b) is an amine oxide type surfactant having one hydrocarbon group having 8 to 16 carbon atoms. Examples of the hydrocarbon group having 8 to 16 carbon atoms contained in the molecule include an alkyl group or alkenyl group having 8 to 16 carbon atoms, which may be linear or branched. The component (b) is preferably an amine oxide type surfactant having one hydrocarbon group having 8 to 14 carbon atoms from the viewpoint of contributing to foaming properties during rinsing, and the hydrocarbon group having 12 to 14 carbon atoms. An amine oxide type surfactant having one is more preferable.

  The component (b) is, for example, an amine oxide surfactant having one hydrocarbon group having 8 to 16 carbon atoms and two alkyl groups having 1 to 6 carbon atoms or two hydroxyalkyl groups having 1 to 3 carbon atoms. is there. Examples of such amine oxide type surfactants include compounds represented by the following general formula (1).

[Wherein R ¹ is a hydrocarbon group having 8 to 16 carbon atoms, R ² is an alkylene group having 1 to 3 carbon atoms, R ³ and R ⁴ are independently an alkyl group or hydroxyalkyl having 1 to 3 carbon atoms. Group, X is a group selected from —COO—, —CONH—, and —O—, and m is a number of 0 or 1. ]

In the above general formula (1), R ¹ is preferably an alkyl group or alkenyl group having 8 to 16 carbon atoms, and more preferably an alkyl group having 8 to 14 carbon atoms from the viewpoint of contributing to foaming properties during rinsing. Or an alkenyl group, more preferably an alkyl group or alkenyl group having 12 to 14 carbon atoms, and still more preferably an alkyl group having 12 to 14 carbon atoms. R ¹ may have an alkyl group structure derived from natural fats and oils, and is preferably a straight chain from the viewpoint of using natural raw materials. Specific examples of the preferred compound include compounds in which R ¹ is a linear alkyl group having 12 to 14 carbon atoms, R ³ and R ⁴ are both methyl groups, and m is 0 in the general formula (1). Among them, from the viewpoint of contributing to foaming properties during rinsing, R ¹ is a dodecyl group, R ³ and R ⁴ are both methyl groups, and m is 0 (ie, dodecyldimethylamine oxide) Is particularly preferred.

  (B) A component can be used individually by 1 type or in combination of 2 or more types as appropriate. Among them, from the viewpoint of foaming property at the time of rinsing, an amine oxide type surfactant having one alkyl group having 12 to 14 carbon atoms in the molecule alone or an alkyl group having 12 to 14 carbon atoms in the molecule is used. It is particularly preferable to use a combination of two or more amine oxide surfactants having one.

  When the content of the component (b) in the liquid detergent composition of the present invention is 0.5% by mass or more, sufficient foaming properties and foam stability can be obtained without being affected by the load of dirt. Moreover, 19.5 mass% or less is preferable from a viewpoint of a compoundability. From the viewpoint of realizing sufficient foamability and foam stability during washing and good blendability, the content of the component (b) is 0.5 to 19.5 mass%, more preferably 2 to 15 mass%. %, More preferably 3 to 10% by mass.

<(C) component>
Component (c) is a copolymer of one kind selected from olefins having 4 to 8 carbon atoms and styrene (hereinafter referred to as (c1) component) and maleic acid (hereinafter referred to as (c2) component). In reducing the increase in viscosity when the component (a) and the component (b) are mixed at a specific ratio, it is important to use the component (c) together.

  The component (c) in the liquid detergent composition of the present invention includes, in addition to the components (c1) and (c2), one or more other monomers within a range that does not impair the effects of the present invention. Copolymers copolymerized with can be used.

  Examples of the olefin having 4 to 8 carbon atoms used as the component (c1) include diisobutylene, isobutylene, and pentene, and increase in viscosity when the component (a) and the component (b) are mixed at a specific ratio. From the viewpoint of the effect of reducing the above, diisobutylene and isobutylene are preferable, and diisobutylene is particularly preferable. Preferred specific examples of the component (c) include diisobutylene / maleic acid copolymer, isobutylene / maleic acid copolymer, and pentene / maleic acid copolymer. The components (a) and (b) A diisobutylene / maleic acid copolymer is particularly preferred from the viewpoint of the effect of reducing the increase in viscosity when mixing at a specific ratio of the present application.

  The copolymerization ratio (molar ratio) between the component (c1) and the component (c2) is (c1) / (c2) from the viewpoint of reducing the increase in viscosity when the component (a) and the component (b) are mixed. ) The molar ratio is preferably 1/9 to 9/1, more preferably 3/7 to 7/3.

  The component (c) of the present invention may be obtained by any polymerization method, but a methyl ethyl ketone polymerization method is particularly preferred.

The weight average molecular weight (Mw) of the copolymer of component (c) is from 2,000 to 200,000 from the viewpoint of reducing the increase in viscosity when mixing component (a) and component (b). The range is suitable, more preferably 2,000 to 100,000, and still more preferably 2,000 to 50,000.
The weight average molecular weight can be measured by size exclusion chromatography under the following conditions.

(Weight average molecular weight measurement conditions)
Apparatus: HLC-8320GPC (manufactured by Tosoh Corporation)
Calibration curve: Standard polystyrene Column: α-M + α-M (manufactured by Tosoh Corporation)
Eluent: 50 mM lithium bromide, 60 mM phosphoric acid / N, N-dimethylformamide

  When the content of the component (c) in the liquid detergent composition of the present invention is 0.1% by mass or more, the increase in viscosity when the components (a) and (b) are mixed may be reduced. Moreover, 10 mass% or less is preferable from a compounding viewpoint. From the viewpoint of reducing the increase in viscosity when mixing the component (a) and the component (b) and the blendability, the content of the component (c) is 0.1 to 10% by mass, more preferably 0. 2 to 8% by mass, more preferably 0.3 to 6% by mass, and particularly preferably 0.5 to 5% by mass.

  In making the foamability / foam stability at the time of washing and the foamability at the time of rinsing compatible, the content ratio of the component (a) and the component (b) and the total content thereof should be within a specific range. is important.

  That is, with respect to the content ratio of the component (a) and the component (b) (mass ratio of the component (a) / (b)), it is preferably 1/10 or more from the viewpoint of foaming properties during rinsing, From the viewpoint of foam stability during washing, it is preferably 10/1 or less. From the viewpoint of achieving a high level of foam stability during foam cleaning and detergency during rinsing, and from the viewpoint of keeping the viscosity of the liquid detergent composition within a suitable range, component (a) / (b ) Component mass ratio is 1/10 to 10/1, more preferably 1/5 to 5/1, and still more preferably 1/3 to 3/1.

  The total content of the component (a) and the component (b) is preferably 4% by mass or more from the viewpoint of obtaining sufficient foaming properties at the time of washing, and 20% by mass or less from the viewpoint of foaming properties at the time of rinsing. Is preferred. From the viewpoint of achieving a high level of both foaming properties during washing and defoaming properties during rinsing, and from the viewpoint of keeping the viscosity of the liquid detergent composition within a suitable range, the components (a) and (b) The total content of the components is 4 to 20% by mass, more preferably 5 to 20% by mass, further preferably 6 to 15% by mass, and particularly preferably 7 to 10% by mass.

  By setting the content ratio of the component (a) and the component (b) and the total content thereof to the above specific range, it is possible to achieve both foamability / foam stability at the time of washing and foamability at the time of rinsing. The present inventors have found that, as described at the beginning, it has also been found that when the component (a) and the component (b) are used in the above specific range, the viscosity of the liquid detergent is remarkably increased. Yes. In solving such a problem, it is important to use the component (c) together at a specific ratio with respect to the total content of the components (a) and (b).

  That is, the content ratio of the component (c) to the total content of the component (a) and the component (b) [mass ratio of (c) component / [(a) component + (b) component]] is (a) From the viewpoint of reducing the increase in viscosity when mixing the component and the component (b), it is preferably 1/100 to 2.5 / 1, more preferably from the viewpoint of effectively reducing the increase in viscosity. 1/80 to 2.5 / 1, more preferably 1/50 to 2/1, particularly preferably 1/20 to 1/1.

  The viscosity of the liquid detergent composition of the present invention was determined by adjusting the temperature of the composition to 20 ° C. using a B-type viscometer (manufactured by TOKIMEC). 2 or NO. It is possible to measure at a rotational speed of 6 to 60 rpm using a No. 3 rotor.

  (C) The viscosity reduction magnification described in the examples can be used as an index of the effect of reducing the viscosity by the blending of the components. The value of the viscosity reduction ratio is preferably 1.5 or more, more preferably 2 or more, and further preferably 5 or more.

<(D) component>
The liquid detergent composition of the present invention further contains a bactericidal agent (hereinafter referred to as component (d)) from the viewpoint of producing a bactericidal effect during washing and ensuring the sanitary condition of food processing equipment and / or cooking equipment. Is desirable. As the component (d), any conventionally known disinfectant can be used as long as there is no problem in blendability. For example, a halogen acid salt, an oxidizing halogen acid salt, a quaternary ammonium salt fungicide, a biguanide fungicide, an amino acid fungicide, or the like can be used.

  From the viewpoint of complex formation (mixing stability) with the component (a) present as an anion in the liquid detergent composition, the component (d) is at least one selected from oxidative halogen acids and salts thereof. Are preferred. Examples of the oxidizing halogen acid include hypochlorous acid, hypobromite, and chlorous acid, and hypochlorous acid is preferred from the viewpoint of bactericidal properties. Examples of the oxidative halogen acid salt include hypochlorous acid, hypobromite, and alkali metal salts of chlorous acid. From the viewpoint of bactericidal properties and versatility, alkali metal salts of hypochlorous acid are used. Of these, sodium hypochlorite is preferable.

  When the content of the component (d) in the liquid detergent composition of the present invention is 0.5% by mass or more, a sufficient bactericidal effect can be obtained, and from the viewpoint of blendability, the content is 10% by mass. The following is preferred. From the viewpoint of obtaining a sufficient bactericidal effect and good compoundability, the content of the component (d) is 0.5 to 10% by mass, more preferably 1.5 to 8% by mass, and further preferably 2 to 5% by mass. %. Here, the content is a value using a converted amount as an oxidizing halogen acid when the component (d) contains an oxidizing halogen acid salt.

  The liquid detergent composition of the present invention is preferably strongly alkaline from the viewpoint of detergency, and preferably contains an alkaline agent. Examples of the alkali agent include alkali metal hydroxides and alkali metal silicates. Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide. Examples of the alkali metal silicate include sodium silicate and potassium silicate, specifically, sodium metasilicate, sodium orthosilicate, and No. 1 silicic acid. Sodium, No. 2 sodium silicate, No. 3 sodium silicate, No. 4 sodium silicate, 1K potassium silicate, and 2K potassium silicate are mentioned.

  The liquid detergent composition for food processing equipment and / or cooking equipment of the present invention preferably has a pH of 11.5 or more at 20 ° C. of a 5 mass% aqueous solution diluted 20 times with water. Here, the pH value is a value measured using pH METER F-21 (manufactured by Horiba, Ltd.).

  The liquid detergent composition of the present invention can also contain an organic phosphonate such as 1-hydroxyethane-1,1-diphosphonate from the viewpoint of foam stability during foam cleaning. However, if the amount of the organic phosphonate compounded is large, it may affect the foaming property at the time of rinsing, so it is important to add it in an amount that does not impair the foaming property. Specifically, the content of the organic phosphonate in the liquid detergent composition of the present invention is preferably 0% by mass or more and less than 0.5% by mass, and is included from the viewpoint of foaming property during rinsing. More preferably not.

  As long as the liquid detergent composition of the present invention does not inhibit the desired effect of the present application, other surfactants, chelating agents, foam increasing agents, hydrotropes, colorants, ordinarily used in liquid detergent compositions, You may contain arbitrary components, such as a fragrance | flavor, a builder, a rust preventive agent, and a viscosity modifier. Here, aromatic sulfonates such as toluene sulfonate, xylene sulfonate, cumene sulfonate, and naphthalene sulfonate can be used as the builder for improving the cleaning performance. Moreover, radical scavengers, such as BHT, can also be mix | blended in the range which does not impair the effect of this invention.

  In the liquid detergent composition of the present invention, the remainder other than the component (a), the component (b) and the component (c), and the optional component may be water. As the water, ion exchange water preferably containing no hardness component can be used.

  The liquid detergent composition of the present invention exhibits a remarkable effect of exhibiting a suitable range of viscosity and excellent handleability while achieving both foamability / foam stability during washing and foam removal during rinsing. . The viscosity (20 ° C.) of the liquid detergent composition of the present invention is preferably 1 to 1500 mPa · s from the viewpoint of excellent handleability, and particularly in handleability when performing cleaning using an automatic feeder. From an excellent viewpoint, it is more preferably 1 to 800 mPa · s, and further preferably 1 to 500 mPa · s.

  Although the preparation method of the liquid detergent composition of this invention is not restrict | limited in particular, For example, the raw materials (a fatty acid, an amine oxide, a copolymer, water, etc.) except a disinfectant are made into the temperature of 40-80 degreeC. After obtaining a uniform transparent mixed solution, it is gradually cooled, and it can be prepared by blending a bactericide after confirming that it has become 40 ° C. or lower.

<How to use liquid detergent composition>
As a result of reducing the viscosity, the liquid detergent composition of the present invention is excellent in handleability and can be used in cleaning methods in various situations. The cleaning method is not particularly limited, but a method of directly applying the liquid cleaning composition of the present invention to an object to be cleaned, or diluting the liquid cleaning composition of the present invention 5 to 200 times with water. The diluted liquid is put into the injection device, and the foam generated by water pressure or air pressure is sprayed and adhered to the equipment or equipment to be cleaned, and held for a certain period of time, and then rubbed with a brush or sponge. Or a method of rinsing with water without rubbing.

  Even when the liquid detergent composition of the present invention is diluted with water containing a hardness component such as tap water, it exhibits excellent foamability / foam stability during washing and excellent foam during rinsing. Since it has the characteristics of exhibiting cutability, having a suitable range of viscosity, and excellent handleability, it can be suitably used for washing food processing equipment and / or cooking equipment.

The liquid cleaning composition of this invention is used suitably for the washing | cleaning method containing the following processes 1-3 as a food processing equipment and / or cooking equipment cleaning composition.
Step 1: A step of diluting a liquid detergent composition with water at a dilution factor of 5 to 200 times and / or spraying it in a foam state while diluting and adhering it to food processing equipment and / or cooking equipment Step 2: Step of holding foam for a certain time Step 3: Step of rinsing food processing equipment and / or cooking equipment with water

In step 1, the liquid detergent composition of the present invention is preliminarily diluted with water at a dilution factor of 5 to 200 times, and then sprayed in the form of foam. Alternatively, the liquid detergent composition is put in a dedicated container, directly connected to the water with a hose or the like, and mixed while being diluted and sprayed into a foam. A combination of the above pre-dilution and simultaneous dilution can also be used to spray a diluted solution of the liquid detergent composition in the form of a foam. The dilution rate in Step 1 is 5 to 200 times, and more preferably 20 to 100 times.
Here, the water used for dilution is generally assumed to be water containing a hardness component such as tap water. The hardness of the water used for dilution is preferably in the range of 0.1 to 8 ° dH, and more preferably in the range of 0.1 to 4 ° dH, from the viewpoint of foam stability during foam cleaning. Is preferred.

  As an aspect in which the diluted solution of the liquid detergent composition of the present invention is jetted in the form of foam, an appropriate amount of the diluted solution diluted with water at a predetermined magnification is filled in a dedicated foam washer and air / compressed from the outside. The aspect which mixes air and injects in foamy form is mentioned suitably. The total content of the component (a) and the component (b) of the composition of the present invention in the diluted solution (cleaning solution) is preferably 0.02 to 4% by mass, more preferably 0.02 to 1% by mass. When the processing area is large, such as a production line in a food processing factory, a bubble washer (for example, “SCU-HF” manufactured by Spraying, “KF-100”, “KF-200” manufactured by Kao Corporation) Preferably used. When the processing area is small, such as a cooking utensil such as a cutting board, a hand sprayer that can generate bubbles intermittently, such as a trigger sprayer or a former player, is preferably used.

  In particular, in step 1, it is preferable to spray in the form of bubbles without being intermittent. Here, “injection without interruption” means that the cleaning agent is continuously injected in a foam form (for example, 5 seconds or more) while being opened by a lever, switch, or the like using a foam washer. This is an "intermittent" injection, for example, an injection that occurs when a lever is pulled using a hand sprayer such as a trigger sprayer or a former player, and stops immediately. Distinguish from the aspect.

  The mode of foaming without intermittent use using a foam washer is particularly effective when the area and scale of food processing equipment and / or cooking equipment to be cleaned are large.

  When using a foam washer, the expansion ratio (ratio of foam volume (mL) / foam weight (g)) is preferably 3 to 50 times, more preferably 5 to 40 times, and particularly preferably 10 to 40 times. Preferably it is. The pressure during injection (gauge pressure) is preferably 0.1 to 1 MPa, more preferably 0.2 to 0.8 MPa, and particularly preferably 0.2 to 0.5 MPa. When a hand sprayer such as a trigger sprayer or a foam player is used, the expansion ratio is preferably 2 to 30 times, more preferably 2 to 20 times, and particularly preferably 3 to 10 times.

  In Step 1, the diluted solution of the liquid detergent composition of the present invention is jetted in the form of foam and attached to food processing equipment and / or cooking equipment, and the foam is held for a certain time (Step 2). The time for holding the bubbles in step 2 is preferably 1 to 60 minutes, more preferably 1 to 45 minutes, from the viewpoint of the mechanism and workability of each device.

  The time for holding the bubbles in step 2 varies depending on the dilution rate of the diluted solution and the usage scene, and is not particularly limited. For example, at a dilution rate of 5 to 50 times, the time for holding the bubbles is 1 to 60 minutes. In addition, at a dilution factor of 50 to 200 times, it is preferable to stably hold the foam for 1 to 10 minutes.

  While it is preferable to leave the foam in Step 2 while it is held, it is possible to add a little water or the like.

  After holding the foam for a certain time, in step 3, the food processing equipment and / or cooking equipment is rinsed with water. The temperature of the rinsing water is preferably 10 to 70 ° C, more preferably 20 to 70 ° C. As the rinsing water, tap water can be used, and it may be heated and used to adjust to the preferable water temperature. Generally, a rinsing operation by a human hand is performed with a hose or the like. The liquid detergent composition of the present invention is excellent in foaming property at the time of such rinsing, and requires a small amount of rinsing water as compared with the conventional detergent composition, and is economically advantageous. (Working time and number of workers) and environmental load are significantly reduced.

Each compounding component used in the examples and comparative examples is summarized below.
・ Lauric acid: LUNAC L-98, manufactured by Kao Corporation ・ Myristic acid: LUNAC MY-98, manufactured by Kao Corporation ・ Palmitic acid: LUNAC P-98, manufactured by Kao Corporation ・ Dodecyldimethylamine oxide: Amphitol 20N , Manufactured by Kao Corporation, effective mass 35% by mass ^{* 1}
-Diisobutylene / maleic acid copolymer: Demol EP, manufactured by Kao Corporation, effective content 25% by mass ^{* 1}
・ Sodium hypochlorite: middle-dose sodium hypochlorite, manufactured by Nankai Chemical Co., Ltd. ・ Sodium chlorite: Sylbright 25, manufactured by Nippon Carlid Co., Ltd., effective amount 25% by mass ^{* 1}
-Potassium hydroxide: Liquid caustic potash (48% by mass), manufactured by Asahi Glass Co., Ltd.

^{* 1 The} composition in the table is the actual concentration.

Example 1-5 and Comparative Example 1-5
The liquid detergent composition shown in Table 1 was prepared and the following tests were conducted. The results are also shown in Table 1.

(1) Viscosity characteristics test Using a B-type viscometer (manufactured by TOKIMEC), the liquid detergent composition described in Table 1 was adjusted to a temperature of 20 ° C, and NO. 2 or NO. Using the rotor No. 3, the viscosity was measured at a rotation speed of 6 to 60 rpm, and the value 60 seconds after the start of rotation was read.

(2) Evaluation Test for Viscosity Reduction Effect The viscosity reduction magnification was calculated by substituting the viscosity value obtained in (1) above into the following formula 1.

<Formula 1>
(Viscosity reduction magnification) = (Viscosity of liquid detergent composition when component (c) is not blended) / (Viscosity of liquid detergent composition blended with component (c))

Example 6-16 and Comparative Example 6-8
The liquid detergent composition shown in Table 2 was prepared and the following tests were performed. The results are also shown in Table 2.

(1) Viscosity characteristic test Using a B-type viscometer (manufactured by TOKIMEC), the liquid detergent composition described in Table 2 was adjusted to a temperature of 20 ° C, and NO. 2 or NO. Using the rotor No. 3, the viscosity was measured at a rotation speed of 6 to 60 rpm, and the value 60 seconds after the start of rotation was read. In this test, 1500 mPa · s or less is acceptable. In addition, what solidified at the time of mixing and whose viscosity could not be measured was described as “solidification”.

(2) Foam stability test The liquid detergent composition shown in Table 2 was diluted 20 times with water having a hardness of 4 ° dH to form a 5% by mass aqueous solution as a pump former container (B 523: Yoshino Industrial Co., Ltd.). 100 mL). A foam head is formed by pushing 1 former head into a 300 mL disposable cup to form foam (1 g foam per push; foaming ratio 20 times), and the time until complete bubble breaking is visually determined. Minute). In this test, 60 minutes or more is passed.

(3) Rinsability test The liquid detergent composition described in Table 2 was diluted 20 times with water having a hardness of 4 ° dH to form a 5% by mass aqueous solution as a pump former container (B 523: manufactured by Yoshino Kogyo Co., Ltd.). ) Was added to 100 mL. A foam head was formed by pushing the former head 1 time into a 300 mL disposable cup (producing 1 g of foam per push; expansion ratio 20 times). After 1 minute, 100 mL of water (25 ° C.) having a hardness of 4 ° dH was added to the foam, and the time until the bubble was completely broken was visually determined. The time (second) was measured. In this test, less than 20 seconds are accepted.

(4) Detergency test 10 μg of rapeseed oil containing 0.1% Sudan III was applied to a standard test plate (SUS304: 1.0 mm × 30 mm × 80 mm manufactured by Test Panel Co., Ltd.), and this was used as a cleaning model test plate. 100 ml of a 5% by weight aqueous solution (4 ° dH hard water) of the liquid detergent composition was put into a pump former container (B 523: manufactured by Yoshino Kogyo Co., Ltd.), and foam formed by pushing the former head once (per push) 1 g of foam was produced (foaming ratio 20 times) was applied to the washed model test plate. After leaving it for 30 minutes after application, it was rinsed with tap water, dried, the amount of residual oil was measured by hexane extraction, and the washing rate (%) was calculated by the following formula. In this test, 70% or more is acceptable.
Cleaning rate (%) = 100 × ((applied oil amount) − (residual oil amount)) / (applied oil amount)
The cleaning rate regarding the liquid cleaning composition of the Example of Table 2 was in the acceptable range at 70% to 100%.

Claims (8)

(A) 0.5 to 10% by mass of one or more compounds selected from fatty acids having 8 to 14 carbon atoms and salts thereof (however, in the case of containing a fatty acid salt, the converted amount as a fatty acid),
(B) 0.5 to 19.5% by mass of an amine oxide type surfactant having one hydrocarbon group having 8 to 16 carbon atoms, and
(C) Copolymer of maleic acid and one kind selected from olefins having 4 to 8 carbon atoms and styrene
Containing
The mass ratio of (a) component / (b) component is 1/10 to 10/1,
The total content of the component (a) and the component (b) is 4 to 20% by mass, and
The mass ratio of (c) component / [(a) component + (b) component] is 1/100 to 2.5 / 1.
A liquid detergent composition.   Furthermore, the liquid cleaning composition of Claim 1 which contains a disinfectant as (d) component.   The liquid detergent composition according to claim 2, wherein the disinfectant is at least one compound selected from oxidative halogen acids and salts thereof.   The liquid cleaning composition according to any one of claims 1 to 3, wherein the component (b) is an amine oxide surfactant having one hydrocarbon group having 8 to 14 carbon atoms.   The liquid detergent composition according to any one of claims 1 to 4, wherein the component (b) is an amine oxide surfactant having one hydrocarbon group having 12 to 14 carbon atoms.   The liquid detergent according to any one of claims 1 to 5, wherein the component (a) is one or more compounds selected from caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid and salts thereof. Composition.   A cleaning method using the liquid detergent composition according to claim 1. The cleaning method which uses the liquid cleaning composition of any one of Claims 1-6, and has the following processes 1-3.
Step 1: A step of diluting a liquid detergent composition with water at a dilution factor of 5 to 200 times and / or spraying it in a foam state while diluting and adhering it to food processing equipment and / or cooking equipment Step 2: Step of holding foam for a certain time Step 3: Step of rinsing food processing equipment and / or cooking equipment with water