JP5802612B2 - Liquid detergent for kitchen - Google Patents

Description

  The present invention relates to a liquid cleaning agent for kitchens.

In a liquid cleaning agent for kitchens, high cleaning power and foaming property are required for oil stains adhering to tableware or cooking utensils.
Conventionally, a liquid cleaning agent for kitchens uses a polyoxyalkylene alkyl ether sulfate as a main cleaning component and an amine oxide surfactant in view of foaming properties.
A polyoxyalkylene alkyl ether sulfate is produced by adding an alkylene oxide to a synthetic alcohol and sulfating it. Synthetic alcohols contain an alcohol having a branched alkyl group in an amount of 20% by mass or more based on the production method, or a derivative derived from a secondary alcohol as a main component. Polyoxyalkylene alkyl ether sulfates using the synthetic alcohol as a raw material are widely used because they hardly cause gelation when mixed with water and have good storage stability.

In recent years, there has been a demand for the development of products that take the global environment into consideration, such as the establishment of numerical targets for the reduction of carbon dioxide emissions. Among them, from the viewpoint of carbon neutral, alcohol having a linear alkyl group derived from natural fats and oils (natural alcohol) has been used as a detergent raw material. For example, in household cleaning agents, polyoxyethylene alkyl ether sulfate (AES) using natural alcohol as a raw material is used.
It is known that polyoxyethylene alkyl ether sulfates have higher detergency against oil stains and the like as they contain more EO adducts with a smaller number of moles of ethylene oxide (EO). AES using natural alcohol as a raw material has an alkyl sulfate (AS) with no EO added in an amount of about 20% by mass or more based on the whole AES, particularly when the average added mole number of EO is 1 mol or 2 mol. . However, the liquid detergent containing AES containing a large amount of AS (0 mol adduct of EO) is excellent in detergency against oil stains and the like, but has a problem that precipitation is likely to occur particularly when stored under low temperature conditions.

  On the other hand, Patent Document 1 discloses a liquid detergent containing a polyoxyalkylene alkyl ether sulfate using a natural alcohol as a raw material and an amine oxide surfactant. In the invention of Patent Document 1, a polyoxyalkylene alkyl ether sulfate produced by first adding a small amount of propylene oxide (PO) to natural alcohol to reduce unreacted alcohol and then adding EO. Is used to improve low-temperature stability.

JP 2009-215353 A

However, when the polyoxyalkylene alkyl ether sulfate added with PO is used, bubbles are hardly formed.
On the other hand, when a liquid detergent containing AES with a high AS content is used without adding PO, a stable foam film is formed when the liquid detergent is bubbled. These bubbles accumulate in the kitchen drain and are difficult to disappear, and the bubbles do not break. In particular, the depth of sink strainers attached to the drains of kitchen sinks has recently become shallower (thinners are becoming thinner), and the sink strainer is equipped with a net for environmental considerations. Because of the increase in the number of bubbles, the foam at the drain outlet tends to deteriorate.
On the other hand, generally considered is a method of improving foam loss by blending an antifoaming agent (a solvent, an additive having a branched structure, etc.). However, the foam tends to be difficult to form due to the addition of the antifoaming agent, and this tendency is remarkable particularly when oil stains are present. Thus, coexistence of foaming and bubble breakage is a difficult task.
This invention is made | formed in view of the said situation, It is made into a subject to provide the liquid cleaning agent for kitchens which is excellent in the detergency and foaming property with respect to oil stains, and is excellent in foaming at a drain outlet. .

When polyoxyalkylene alkyl ether sulfate (AES) using natural alcohol as a raw material has an average number of moles of ethylene oxide (EO) as low as 1 or 2 moles, alkyl sulfate without EO ( There are many AS: EO 0-mole adducts). This AS is a component with a high detergency against oil stains. However, when the concentration of AS increases, a stable foam film is formed when foamed, and the foam accumulated in the kitchen drainage port is difficult to disappear, and the foam breaks. Is getting worse.
The present inventors examined a method for effectively using AS as it is without reducing the amount of AS, as in the past, without reducing the amount of AS present in AES by adding propylene oxide (PO) or the like. And it discovered that the said subject can be solved by mixing AS and the alkylamine oxide which exist in AES in a specific ratio, and mixing a specific hydrotrope agent and AES in a specific ratio, The invention has been completed.

  That is, the liquid detergent for kitchen of the present invention is represented by the anionic surfactant (a) represented by the following general formula (1), the alkylamine oxide (b), and the following general formula (2). The compound (c) and water are contained, and the component (a) contains 35 to 55% by mass of the compound (a0) of m = 0 in the general formula (1) with respect to the whole component (a). The mass ratio represented by (a0) component / (b) component is 0.2 to 1.5, and the mass ratio represented by (c) component / (a) component is 0.01 to 1. It is characterized by being.

［式中、Ｒ^１は炭素数８〜２４の直鎖状の炭化水素基を表す。ｍは（ＣＨ_２ＣＨ_２Ｏ）の繰り返し数を表し、ｍの平均値が０．５〜１．５である。Ｍ^＋は対イオンである。］

[Wherein, R ¹ represents a linear hydrocarbon group having 8 to 24 carbon atoms. m represents the number of repetitions of (CH ₂ CH ₂ O), and the average value of m is 0.5 to 1.5. M ⁺ is a counter ion. ]

［式中、Ｒ^２は炭素数３〜６の炭化水素基を表す。ｎはＡ^１Ｏの平均繰り返し数を表し、１〜５の数である。Ａ^１Ｏは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ² represents a hydrocarbon group having 3 to 6 carbon atoms. n represents the average number of repetitions of A ¹ O and is a number of 1 to 5. A ¹ O represents an oxyalkylene group having 2 to 4 carbon atoms. ]

  It is preferable that the liquid detergent for kitchens of this invention further contains the compound (d) represented by following General formula (3).

［式中、Ｒ^３は炭素数５〜１７の炭化水素基を表す。ｓはＡ^２Ｏの平均繰り返し数を表し、１〜５の数である。Ａ^２Ｏは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ³ represents a hydrocarbon group having 5 to 17 carbon atoms. s represents the average number of repetitions of A ² O and is a number of 1 to 5. A ² O represents an oxyalkylene group having 2 to 4 carbon atoms. ]

  Moreover, it is preferable that the mass ratio represented by the (d) component / [(a) component + (b) component] is 0.1-1 in the liquid detergent for kitchens of this invention.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid cleaning agent for kitchens which is excellent in the detergency with respect to oil stain | pollution | contamination, and foaming property, and is excellent in foaming at a drain outlet can be provided.

  The liquid detergent for kitchen of the present invention comprises an anionic surfactant (a) represented by the general formula (1), an alkylamine oxide (b), and a compound (c) represented by the general formula (2). And water.

<Anionic surfactant (a) represented by general formula (1)>
In the kitchen liquid detergent of the present invention, an anionic surfactant (a) represented by the following general formula (1) is used.

［式中、Ｒ^１は炭素数８〜２４の直鎖状の炭化水素基を表す。ｍは（ＣＨ_２ＣＨ_２Ｏ）の繰り返し数を表し、ｍの平均値が０．５〜１．５である。Ｍ^＋は対イオンである。］

[Wherein, R ¹ represents a linear hydrocarbon group having 8 to 24 carbon atoms. m represents the number of repetitions of (CH ₂ CH ₂ O), and the average value of m is 0.5 to 1.5. M ⁺ is a counter ion. ]

In the formula (1), the carbon number of ^{R 1} is from 8 to 24, preferably 8 to 18 carbon atoms, more preferably from 10 to 16 carbon atoms, more preferably be 10 to 14 carbon atoms Particularly preferably, it has 12 to 14 carbon atoms. Examples of the hydrocarbon group for R ¹ include an alkyl group and an alkenyl group, and an alkyl group is preferable.
R ¹ is preferably a linear alkyl group derived from a raw material for natural fats and oils from the viewpoint of foamability, detergency against oil stains, and the environment. Suitable raw materials for natural fats and oils include palm kernel oil and coconut oil.

Wherein in formula (1), m represents the number of repetitions of _(CH 2 CH 2 O).
The average value of m is a number from 0.5 to 1.5. If m is less than 0.5, the bubbles are difficult to disappear, and the foam breakage at the drainage port becomes worse. If m exceeds 1.5, the detergency against oil stains tends to decrease. Here, “average value of m” means a weighted average value.

The component (a) contains 35 to 55% by mass of the compound (a0) (component (a0)) of m = 0 in the formula (1) with respect to the total component (a), that is, (a ), The compound (a0) (component (a0)) of m = 0 in the formula (1) is 35 to 55% by mass. The component (a) preferably contains 40 to 50% by mass of the component (a0) with respect to the total component (a).
When the component (a0) is less than 35% by mass with respect to the total component (a), the detergency against oil stains tends to decrease. When the component (a0) exceeds 55% by mass, the bubbles are difficult to disappear, and the foam breakage at the drainage port is deteriorated.
The component (a) is a mixture of molecules having a distribution in which the average value of m in the formula (1) is 0.5 to 1.5 and having different numbers of repeating (CH ₂ CH ₂ O).
The distribution of m is preferably 0 to 20, more preferably 0 to 16, and particularly preferably 0 to 12.

In the formula (1), M ⁺ is a counter ion.
Examples of M serving as a counter ion include those capable of forming a water-soluble salt with R ¹ —O— (CH ₂ CH ₂ O) _m —SO ₃ ^— , and specifically include alkali metals and alkaline earths. A metal, ammonium, alkanolamine, etc. are mentioned.
Examples of the alkali metal include sodium and potassium. Examples of the alkaline earth metal include calcium and magnesium. Examples of the alkanolamine include monoethanolamine, diethanolamine, and triethanolamine.
When M is a divalent cation, a water-soluble salt can be formed with (R ¹ —O— (CH ₂ CH ₂ O) _m —SO ₃ ^— ) ₂ .

Specific examples of the component (a) include polyoxyethylene (0.5) linear alkyl (C12) sodium sulfate, polyoxyethylene (1) linear alkyl (C12) sodium sulfate, polyoxyethylene (1. 5) Linear alkyl (C12) sodium sulfate, polyoxyethylene (0.5) linear alkyl (C12 / 14 = 75/25; derived from natural fats and oils) Sodium sulfate, polyoxyethylene (1) linear alkyl (C12 / 14 = 75/25; derived from natural fats and oils) sodium sulfate, polyoxyethylene (1.5) linear alkyl (C12 / 14 = 75/25; derived from natural fats and oils) sodium sulfate, polyoxyethylene (1) linear alkyl (C12 / 14 = 75/25; derived from natural oil and fat raw material) triethanolamine sulfate, etc. The a0) component include those containing 35 to 55 wt% based on the total the component (a).
Among them, polyoxyethylene (1) linear alkyl (C12 / 14 = 75/25; derived from natural fats and oils) sodium sulfate salt is preferable because the effects of the present invention are particularly easily obtained.
Here, for example, “polyoxyethylene (0.5)” means that the average value of m in the formula (1) is 0.5.
“Linear alkyl (C12)” means that R ¹ in the formula (1) is a linear alkyl group having 12 carbon atoms.
“Straight chain alkyl (C12 / 14 = 75/25; derived from natural oil and fat raw material)” means that R ¹ in the formula (1) is a straight chain alkyl group having 12 carbon atoms, and 14 carbon atoms. It means that it is a mixture with a linear alkyl group (mixing ratio: 75/25 by mass ratio), and is a linear alkyl group derived from a natural fat or oil raw material.

(A) A component may be used individually by 1 type and may be used in combination of 2 or more type as appropriate.
In the kitchen liquid detergent, the content of the component (a) is preferably 3 to 20 mass%, more preferably 5 to 16 mass%, based on the total mass of the kitchen liquid detergent.
When the content of the component (a) is less than the preferred lower limit, the detergency against oil stains tends to decrease. On the other hand, when it exceeds a preferable upper limit value, the bubbles are difficult to disappear, and the foam breakage at the drain port is deteriorated. In addition, the detergency against oil stains tends to decrease.

In the liquid detergent for kitchens, the content of the component (a0) is preferably 0.5 to 9% by mass, more preferably 2 to 6% by mass with respect to the total mass of the liquid detergent for kitchens. is there.
When the content of the component (a0) is less than the preferred lower limit, the cleaning power against oil stains tends to decrease. On the other hand, when it exceeds a preferable upper limit value, the bubbles are difficult to disappear, and the foam breakage at the drain port is deteriorated.

<Alkylamine oxide (b)>
In the liquid detergent for kitchens of the present invention, alkylamine oxide (b) is used.
Suitable examples of the alkylamine oxide (b) include compounds represented by the following general formula (4).

［式中、Ｒ^４は炭素数８〜１８の直鎖状若しくは分岐鎖状のアルキル基又はアルケニル基を表す。Ｒ^５及びＲ^６はそれぞれ独立して炭素数１〜３のアルキル基又はヒドロキシアルキル基を表す。］

[Wherein, R ⁴ represents a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms. R ⁵ and R ⁶ each independently represents an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group. ]

In the formula (4), R ⁴ represents a linear or branched alkyl group having 8 to 18 carbon atoms, or a linear or branched alkenyl group having 8 to 18 carbon atoms, and the number of carbon atoms A linear or branched alkyl group having 8 to 18 carbon atoms is preferable, and a linear alkyl group having 8 to 18 carbon atoms is more preferable.
In the alkyl group and alkenyl group of R ^4, the number of carbon atoms is 8 to 18, and the detergency against oil stains is further improved, so that it is preferably 10 to 14.

In the formula (4), R ⁵ and R ⁶ each independently represent an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, and the alkyl group having 1 to 3 carbon atoms is Preferably, a methyl group is more preferable, and it is more preferable that both R ⁵ and R ⁶ are methyl groups.

Specific examples of the component (b) include lauryl dimethylamine oxide, coconut alkyl dimethylamine oxide, and lauryl diethylamine oxide.
Of these, lauryl dimethylamine oxide is more preferable because of its particularly good detergency against oil stains.

(B) A component may be used individually by 1 type and may be used in combination of 2 or more types as appropriate.
In the kitchen liquid detergent, the content of the component (b) is preferably 2 to 12% by mass, more preferably 4.5 to 10% by mass with respect to the total mass of the kitchen liquid detergent. is there.
When the content of the component (b) is less than the preferred lower limit, the detergency against oil stains tends to decrease. In addition, the bubbles are difficult to disappear, and the bubble breakage at the drain outlet is worsened. On the other hand, when the preferable upper limit is exceeded, the detergency against oil stains tends to decrease.

In the present invention, “mass ratio represented by (a0) component / (b) component” means the ratio of the content of (a0) component to the content of (b) component in the kitchen liquid detergent (mass Ratio).
The component (a) and the component (b) are mixed so that the mass ratio represented by the component (a0) / component (b) is 0.2 to 1.5, preferably 0.2 to 1. It is mixed so that it may become 1, More preferably, it mixes so that it may become 0.3-0.9, More preferably, it mixes so that it may become 0.4-0.8.
When the said mass ratio is 0.2-1.5, while the detergency with respect to oil stains increases, the foaming at a drain outlet becomes favorable. In particular, when the mass ratio is less than the preferred lower limit, the detergency against oil stains tends to decrease. On the other hand, when the mass ratio exceeds the preferable upper limit value, the bubbles are difficult to disappear, and the foam breakage at the drain port becomes worse. In addition, the detergency against oil stains tends to decrease.

(Compound (c) represented by formula (2))
In the kitchen liquid detergent of the present invention, the compound (c) represented by the following general formula (2) is used.

［式中、Ｒ^２は炭素数３〜６の炭化水素基を表す。ｎはＡ^１Ｏの平均繰り返し数を表し、１〜５の数である。Ａ^１Ｏは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ² represents a hydrocarbon group having 3 to 6 carbon atoms. n represents the average number of repetitions of A ¹ O and is a number of 1 to 5. A ¹ O represents an oxyalkylene group having 2 to 4 carbon atoms. ]

In the formula (2), the hydrocarbon group for R ² may be an aliphatic hydrocarbon group or an aromatic hydrocarbon group.
The aliphatic hydrocarbon group for R ² may be a saturated hydrocarbon group or an unsaturated hydrocarbon group, and is preferably a saturated hydrocarbon group. In addition, the aliphatic hydrocarbon group for R ² may be any of linear, branched or cyclic hydrocarbon groups, and is preferably a linear or branched hydrocarbon group. Specific examples include an n-propyl group, an isopropyl group, an n-butyl group, and an n-hexyl group.
The aromatic hydrocarbon group for R ^2, and a phenyl group.
In said Formula (2), n is the number of 1-5 showing the average repeating number of an oxyalkylene group, 1-3 are preferable, and 1 or 2 is more preferable.
The compound represented by the formula (2), from the n in the formula indicates the average repeating number of the oxyalkylene group, the number of repetitions of A 1 ^O is a mixture of different molecules.
A ¹ O represents an oxyalkylene group having 2 to 4 carbon atoms, and may be a single type or a mixture of two or more types. When two or more kinds are mixed, they may be mixed in a random manner or in a block shape. Examples of A ¹ O include an oxyethylene group, an oxypropylene group, and an oxybutylene group, and an oxyethylene group is preferable from the viewpoint of excellent solubility.

  Specific examples of the component (c) include isopropyl diglycol, butyl diglycol, hexyl diglycol, phenoxyethanol, and phenoxy-2-propanol. Of these, butyl diglycol (butyl carbitol) is preferable because the foaming at the drain outlet is particularly good.

(C) A component may be used individually by 1 type and may be used in combination of 2 or more types as appropriate.
In the kitchen liquid detergent, the content of the component (c) is preferably 0.5 to 10% by mass, more preferably 1 to 7% by mass with respect to the total mass of the kitchen liquid detergent. Preferably it is 2-7 mass%.
When the content of the component (c) is less than the preferred lower limit, the bubbles are difficult to disappear, and the foam breakage at the drainage port becomes worse. On the other hand, when the preferable upper limit is exceeded, the detergency against oil stains tends to decrease.

In the present invention, “mass ratio represented by component (c) / component (a)” means the ratio of the content of component (c) to the content of component (a) in the liquid detergent for kitchen (mass Ratio).
The (a) component and the (c) component have a mass ratio represented by (c) component / (a) component of 0.01 to 1, preferably 0.2 to 0.8, and more preferably. Is 0.2 to 0.6, particularly preferably 0.3 to 0.5.
When the mass ratio is 0.01 to 1, foam breakage at the drain outlet is improved.
If the mass ratio is less than the preferred lower limit, it is difficult to obtain the effect of improving foam loss at the drain outlet. On the other hand, if the mass ratio exceeds the preferred upper limit, the detergency against oil stains tends to decrease. .

<Solvent: Water>
The liquid detergent for kitchens of the present invention contains water as a solvent from the viewpoint of ease of preparation of the liquid detergent, solubility in water when used, and the like.
The content of water in the kitchen liquid detergent is preferably 40 to 90 mass%, more preferably 45 to 85 mass%, and still more preferably 50 to 80 mass% with respect to the total mass of the kitchen liquid detergent. .
If the water content is at least the preferred lower limit, the liquid stability of the liquid detergent with time will be better, and if it is not more than the preferred upper limit, the liquid viscosity will be reasonably low and good from the viewpoint of usability. It becomes.

<Other ingredients>
In the liquid detergent for kitchens of the present invention, other components other than the above-described components may be arbitrarily blended as necessary within the range not impairing the effects of the present invention.
Other components are not particularly limited, and components used in cleaning agents for kitchens, hard surfaces, clothing, etc. can be blended. For example, components other than component (a) or component (b) Surfactant, hydrotrope other than component (c), disinfectant, polyvalent carboxylic acid and / or salt thereof, pH adjuster (sodium hydroxide, sulfuric acid, glycolic acid, etc.), viscosity adjustor, colorant, Antioxidants, antiseptics, bactericides, anti-inflammatory agents, other medicinal ingredients, fragrances, natural extracts and the like can be mentioned.

  The kitchen liquid detergent of the present invention preferably further contains a compound (polyoxyalkylene fatty acid alkanolamide) represented by the following general formula (3) (hereinafter referred to as “component (d)”). By further containing the component (d), the effect of improving foam breakage at the drain outlet is further enhanced. In addition, foaming is better.

［式中、Ｒ^３は炭素数５〜１７の炭化水素基を表す。ｓはＡ^２Ｏの平均繰り返し数を表し、１〜５の数である。Ａ^２Ｏは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ³ represents a hydrocarbon group having 5 to 17 carbon atoms. s represents the average number of repetitions of A ² O and is a number of 1 to 5. A ² O represents an oxyalkylene group having 2 to 4 carbon atoms. ]

In the formula (3), the number of carbon atoms of R ³ is 5 to 17, from the viewpoint of excellent balance between solubility in detergency and water to oil stains, preferably 7 to 11 carbon atoms. If the carbon number of R ³ is 5 or more, the detergency against oil stains is further increased. On the other hand, if the carbon number of R ³ is 17 or less, the solubility in water becomes better.
The hydrocarbon group for R ³ may be saturated or unsaturated, and may be linear, branched or cyclic. Of these, the hydrocarbon group of R ^3, preferably an alkyl or alkenyl group, more preferably an alkyl group, a linear alkyl group is particularly preferred.

In the formula (3), s is a number of 1 to 5 representing the average number of repeating oxyalkylene groups, and s is preferably 1 to 3, and more preferably 1 or 2, since the detergency against oil stains is increased. .
The compound represented by the formula (3), from the s in the formula represents the average repeating number of the oxyalkylene group, the number of repetitions of A 2 ^O is a mixture of different molecules.
A ² O represents an oxyalkylene group having 2 to 4 carbon atoms, and may be a single type or a mixture of two or more types. When two or more kinds are mixed, they may be mixed in a random manner or in a block shape. Examples of A ² O include an oxyethylene group, an oxypropylene group, and an oxybutylene group, and an oxyethylene group is preferable from the viewpoint of excellent solubility.

Specific examples of the component (d) include polyoxyethylene caprylic acid monoethanolamide, polyoxyethylene capric acid monoethanolamide, polyoxyethylene lauric acid monoethanolamide, polyoxyethylene coconut oil fatty acid monoethanolamide and the like. Polyoxypropylene fatty acid monoethanolamides such as polyoxypropylene caprylic acid monoethanolamide, polyoxypropylene capric acid monoethanolamide, polyoxypropylene lauric acid monoethanolamide, polyoxypropylene coconut oil fatty acid monoethanolamide, etc. Amides; polyoxybutylene caprylic acid monoethanolamide, polyoxybutylene capric acid monoethanolamide, polyoxybutylene lauric acid Bruno ethanolamide, such as polyoxybutylene fatty monoethanolamides such as polyoxybutylene coconut oil fatty acid monoethanolamide, and the like.
Among them, as the component (d), polyoxyethylene fatty acid monoethanolamide is particularly preferable because it is easier to achieve both foaming and foaming.

  Examples of commercially available products that can be suitably used as the component (d) include “Amidette 2L-Y”, “Amidette 5C”, and “Amidette 1PL” (all are trade names) manufactured by Kawaken Fine Chemical Co., Ltd. It is done.

(D) A component may be used individually by 1 type and may be used in combination of 2 or more type as appropriate.
In the liquid detergent for kitchens, the content of the component (d) is preferably 1 to 15% by mass, more preferably 1 to 10% by mass, and still more preferably based on the total mass of the liquid detergent for kitchens. It is 3-8 mass%, Most preferably, it is 5-7 mass%.
When the content of the component (d) is equal to or more than the preferable lower limit value, it is easier to obtain the effect of improving bubble breakage at the drain outlet. Moreover, foaming increases. On the other hand, when it is at most the preferable upper limit value, bubbles are more likely to stand.

  The component (d) can be obtained, for example, by reacting a fatty acid ester such as methyl laurate with monoethanolamine in the presence of an alkoxylation catalyst, and then adding an alkylene oxide such as ethylene oxide or propylene oxide. .

In the present invention, “mass ratio represented by (d) component / [(a) component + (b) component]” means the sum of (a) component and (b) component in the kitchen liquid detergent. The ratio (mass ratio) of content of (d) component with respect to content is represented.
As for the mixing ratio of the component (a), the component (b), and the component (d), the mass ratio represented by (d) component / [(a) component + (b) component] is 0.1-1. More preferably, it is 0.1-0.5, More preferably, it is 0.2-0.5, Most preferably, it is 0.3-0.4.
When the mass ratio is 0.1 to 1, the foam breakage at the drain outlet is further improved.
When the mass ratio is at least the preferred lower limit value, the effect of improving foam breakage at the drain outlet is more easily obtained. Moreover, foaming increases. On the other hand, if the mass ratio is less than or equal to the preferable upper limit value, bubbles are more likely to stand.

The kitchen liquid detergent of the present invention may contain a hydrotrope other than the component (c). By further containing a hydrotrope agent, the storage stability particularly under low temperature conditions is improved.
Suitable hydrotropes include water miscible organic solvents; toluene sulfonic acid, toluene sulfonate, cumene sulfonic acid, cumene sulfonate, benzoic acid, benzoate and the like.
“Water-miscible organic solvent” refers to an organic solvent that dissolves 50 g or more in 1 L of ion-exchanged water at 25 ° C. The water miscible organic solvent can also be used as a solvent for the liquid detergent.
The water-miscible organic solvent is not particularly limited as long as it becomes a uniform solution when mixed with water, and is a monohydric alcohol such as ethanol, 1-propanol, 2-propanol, 1-butanol; ethylene glycol, propylene glycol, Examples include polyhydric alcohols such as butylene glycol and glycerin.
Among them, the hydrotrope is preferably one or more selected from the group consisting of toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid, benzoic acid salt and ethanol. One or more selected from the group consisting of acid, toluene sulfonate, cumene sulfonic acid, cumene sulfonate and ethanol are more preferred.
A hydrotrope agent may be used individually by 1 type, and may be used in combination of 2 or more types as appropriate.
In the kitchen liquid cleaning agent, the content of the hydrotrope is preferably 5 to 12% by mass, more preferably 7 to 11% by mass, based on the total mass of the kitchen liquid cleaning agent.
When the content of the hydrotrope is equal to or more than the preferred lower limit, storage stability under low temperature conditions is improved. On the other hand, if it is below the preferred upper limit, the cleaning power against oil stains is further increased.

The kitchen liquid cleaner of the present invention may contain a disinfectant. By further containing a disinfectant, a disinfecting effect is exhibited.
Examples of the disinfectant include zinc compounds such as zinc sulfate, zinc oxide, and zinc hydroxide. Zinc sulfate and zinc oxide are more preferable, and zinc oxide is particularly preferable.
A disinfectant may be used individually by 1 type, and may be used in combination of 2 or more types as appropriate.
In the kitchen liquid detergent, the content of the disinfectant is preferably 0.01 to 0.5% by mass with respect to the total mass of the kitchen liquid detergent.
When the content of the disinfectant is at least a preferable lower limit, a disinfecting effect is easily obtained. On the other hand, if it is below the preferable upper limit value, the liquid stability is easily secured.

The kitchen liquid cleaning agent of the present invention may contain a polyvalent carboxylic acid and / or a salt thereof. By further containing a polyvalent carboxylic acid and / or a salt thereof, the liquid stability is particularly improved.
Preferred examples of the polyvalent carboxylic acid and polyvalent carboxylate include malic acid, succinic acid, tartaric acid, citric acid, and salts thereof, and citric acid or a salt thereof is more preferable.
Polyvalent carboxylic acid and / or its salt may be used individually by 1 type, and may be used in combination of 2 or more types as appropriate.
The content of the polyvalent carboxylic acid and / or salt thereof in the kitchen liquid detergent is preferably 0.1 to 1.5% by mass, more preferably based on the total mass of the kitchen liquid detergent. Is 0.1 to 1% by mass, more preferably 0.3 to 0.7% by mass.
When the content of the polyvalent carboxylic acid and / or salt thereof is not less than the preferred lower limit value, storage stability under both low and high temperature conditions is improved. On the other hand, if it is below the preferred upper limit, the cleaning power against oil stains is further increased.

The pH of the liquid detergent for kitchen of the present invention is 7 to 8 at 25 ° C., and preferably 7.3 to 8.
If the pH of the liquid detergent for kitchen is less than 7, bubbles are hardly formed. In addition, the storage stability may be deteriorated particularly under low temperature conditions. On the other hand, if the pH exceeds 8, the detergency against oil stains may be reduced.
The pH of the liquid detergent for kitchen (controlled at 25 ° C) is a value measured by a method based on JIS K3362-1998 using a pH meter (product name: Horiba F-22, manufactured by Horiba, Ltd.). Indicates.

  As explained above, the liquid cleaning agent for kitchens of the present invention includes the polyoxyethylene alkyl ether sulfate (a) represented by the general formula (1), the alkylamine oxide (b), and the general formula (2). The compound (specific hydrotrope agent) represented by these, and water are contained. In addition, the alkyl sulfate (a0) to which ethylene oxide (EO) is not added is contained in an amount of 35 to 55% by mass with respect to the total component (a), so that it is mainly excellent in detergency against oil stains and foaming properties. Moreover, the detergency with respect to oil stain | pollution | contamination is contained by containing (a) component and (b) component by specific mixing ratio (mass ratio 0.1-1.5 represented by (a0) / (b)). As the flow rate increases, the bubble breakage at the drain outlet becomes better. Furthermore, by containing the component (a) and the component (c) at a specific mixing ratio (the mass ratio represented by the component (c) / the component (a) is 0.01 to 1), Bubbling is better.

The component (a0) in the component (a) has high molecular orientation, and a stable foam film is easily formed. For this reason, when the concentration of the component (a0) in the liquid cleaning agent increases, the detergency against oil stains increases, but the bubbles accumulated in the kitchen drainage port are difficult to disappear and the bubble breakage deteriorates.
In this invention, (c) component which is a specific hydrotrope agent is employ | adopted, The mass ratio of (a0) component and (b) component, and the mass ratio of (a) component and (c) component are set. By prescribing, since the orientation of the (a0) component in the foam film is easily weakened by rinsing while maintaining the ease of foam formation due to the (a0) component, the foam easily disappears and the It is thought that the bubble breakage is improved.

Furthermore, in the present invention, by utilizing a polyoxyethylene alkyl ether sulfate using natural alcohol as a raw material, it is possible to contribute to reduction of carbon dioxide emissions.
In addition, when producing polyoxyalkylene alkyl ether sulfate using natural alcohol as a raw material, it is not necessary to perform an operation of adding a small amount of propylene oxide (PO) to natural alcohol as in the prior art. In addition, the cost can be reduced.
Such a liquid cleaning agent of the present invention is suitable as a cleaning agent for kitchens used for dishwashing and the like that are frequently repeated every day.

  Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.

<Preparation of liquid detergent>
According to the blending composition shown in the table, each of the liquid detergents of each example was prepared by the following production method (when there is an unblended component, the component is not blended).
The unit of the blending amount in the table is “mass%”, and all the components indicate the equivalent amount of pure component.
In addition, the liquid cleaning agent of each example was prepared by balancing with water so that the total of each component described in the table was 100% by mass.

[Method for producing liquid detergent]
First, in a 200 mL beaker, (a) component or (a ′) component, (b) component or (b ′) component, (c) component or (c ′) component, (d) component, and other The ingredients were added and stirred with a magnetic stirrer. Next, water was added and stirred so that the total amount (the total amount was 100 parts by mass) was 93 parts by mass. Thereafter, glycolic acid and 40% by mass sodium hydroxide solution were added to adjust the pH, and the remaining water was added and balanced so that the total amount became 100 parts by mass, thereby producing each of the liquid detergents of each example. .
In addition, the “balance” indicating the blending amount of water means the balance added so that the total blending amount (% by mass) of all the blending components contained in the liquid detergent is 100% by mass.
The “suitable amount” indicating the blending amount of the pH adjuster indicates the total blending amount of glycolic acid and Na hydroxide used as the pH adjuster. For pH adjustment, after blending glycolic acid (1.0% by mass with respect to the total mass of the liquid detergent), hydroxylation was performed so that the pH of the liquid detergent (stock solution) at 25 ° C. would be the pH value shown in the table. Na was blended.
The pH of the liquid detergent was measured using a glass detergent pH meter (product name: Horiba F-22, manufactured by Horiba, Ltd.) with a liquid detergent (stock solution) adjusted to 25 ° C. The measuring method was performed based on JIS K3362-1998.

In the table, “content (mass%) of component (a0) in the composition” is the amount of compound ((a0) component) of m = 0 in the general formula (1) contained in the liquid detergent. Means.
“Content (mass%) of component (a0) in component (a)” is the content of compound ((a0) component) of m = 0 in general formula (1) contained in the entire component (a). It means a ratio (mass ratio).
“Mass ratio (a0) / (b)” means the ratio (mass ratio) of the content of component (a0) to the content of component (b) or component (b ′) in the liquid detergent.
“Mass ratio (c) / (a)” is the ratio of the content of component (c) or component (c ′) to the content of component (a) or component (a ′) in the liquid detergent (mass Ratio).
“Mass ratio (d) / [(a) + (b)]” is the component (d) or (d ′) relative to the total content of the components (a) and (b) in the liquid detergent. It means the ratio (mass ratio) of the content of components.

  Below, the component shown in the table | surface is demonstrated.

· (A) component a-1: polyoxyethylene alkyl ether sulfate, a linear alkyl group ^{R 1} = 12 to 14 carbon atoms in the general formula (1), the average value of m = 1.0, M = Sodium: 43 mass% of m = 0 compound (component (a0)) with respect to the whole a-1.
[Preparation example of a-1]
In an autoclave with a capacity of 4 L, 400 g of a trade name CO1270 alcohol (mixture of 75/25 mass ratio of 12-carbon alcohol and 14-carbon alcohol) manufactured by P & G as raw material alcohol and potassium hydroxide as a reaction catalyst After charging 0.8 g of the catalyst and replacing the inside of the autoclave with nitrogen, the temperature was raised with stirring. Subsequently, while maintaining the temperature at 180 ° C. and the pressure at 0.3 MPa or less, 91 g of ethylene oxide was introduced and reacted to obtain an alcohol ethoxylate.
Gas chromatograph mass spectrometer: GC-5890 manufactured by Hewlett-Packard, detector: flame ionization detector (FID), column: Ultra-1 (manufactured by HP, L25m × φ0.2mm × T0.11 μm As a result, the alcohol ethoxylate obtained had an average addition mole number of ethylene oxide of 1.0. Further, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 43% by mass with respect to the total alcohol ethoxylate obtained.
Next, 237 g of the alcohol ethoxylate obtained above was placed in a 500 mL flask equipped with a stirrer and replaced with nitrogen, and 96 g of liquid sulfuric anhydride (sulfane) was slowly added dropwise while maintaining the reaction temperature at 40 ° C. After completion of dropping, stirring was continued for 1 hour (sulfation reaction) to obtain polyoxyethylene alkyl ether sulfuric acid. Subsequently, this was neutralized with an aqueous sodium hydroxide solution to obtain a-1.

a-2: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = linear alkyl group having 12 to 14 carbon atoms, m average value = 1.2, M = sodium; a-2 42% by mass of m = 0 compound (component (a0)) with respect to the whole.
[Preparation example of a-2]
Alcohol ethoxylate was obtained in the same manner as a-1 except that 109 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average addition mole number of ethylene oxide of 1.2. In addition, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 42% by mass with respect to the total alcohol ethoxylate obtained. Next, except that 93 g of liquid sulfuric anhydride (sulfan) was added dropwise, a sulfation reaction was performed in the same manner as a-1, and a-2 was obtained by neutralizing with an aqueous sodium hydroxide solution.

a-3: sodium polyoxyethylene alkyl ether sulfate (NRES), R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, m average value = 0.6, M = sodium; The ratio of m = 0 compound (component (a0)) to the entire a-3 is 48% by mass.
[Preparation example of a-3]
A solution a was prepared by dissolving 68.03 g of magnesium nitrate hexahydrate, 47.69 g of aluminum nitrate nonahydrate, and 24.43 g of manganese nitrate hexahydrate in 450 g of deionized water. Separately, 13.47 g of sodium carbonate was dissolved in 450 g of deionized water to prepare a solution b.
Solution a and solution b were added dropwise to a catalyst preparation tank in which 1800 g of deionized water had been previously charged, with an aqueous NaOH solution at pH = 9 and a temperature of 45 ° C. over 45 minutes. After aging for 1 hour, the mother liquor was filtered off, and the separated precipitate was washed with 6 liters of deionized water and spray-dried to obtain 30 g of a composite metal hydroxide.
This composite metal hydroxide was baked at 800 ° C. in a nitrogen atmosphere to obtain 19 g of a composite metal oxide catalyst mainly composed of magnesium oxide.
Next, in an autoclave with a capacity of 4 L, 400 g of a trade name CO1270 alcohol (mixture of 75/25 mass ratio of alcohol having 12 carbons and alcohol having 14 carbons) manufactured by P & G as raw material alcohol, 55 g ethylene oxide, The composite metal oxide catalyst (0.3 g) was charged as a reaction catalyst, the inside of the autoclave was replaced with nitrogen, and the temperature was increased while stirring. Subsequently, while maintaining the temperature at 180 ° C. and the pressure at 0.5 MPa or less, 87 g of ethylene oxide was introduced and reacted to obtain an alcohol ethoxylate.
As a result of analyzing in the same manner as in a-1, the obtained alcohol ethoxylate had an average added mole number of ethylene oxide of 0.6. Moreover, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 48% by mass with respect to the total alcohol ethoxylate obtained.
Next, 219 g of the alcohol ethoxylate obtained above was placed in a 500 mL flask equipped with a stirrer and replaced with nitrogen, and 96 g of liquid sulfuric anhydride (sulfane) was slowly added dropwise while maintaining the reaction temperature at 40 ° C. After completion of dropping, stirring was continued for 1 hour (sulfation reaction) to obtain polyoxyethylene alkyl ether sulfuric acid. Next, this was neutralized with an aqueous sodium hydroxide solution to obtain a-3.

a-4: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = linear alkyl group having 12 to 14 carbon atoms, average value of m = 1.4, M = sodium; a-4 40% by mass of m = 0 compound (component (a0)) relative to the whole.
[Preparation example of a-4]
Alcohol ethoxylate was obtained in the same manner as a-1 except that 128 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average added mole number of ethylene oxide of 1.4. In addition, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 40% by mass with respect to the total alcohol ethoxylate obtained. Next, a sulfuric acid reaction was carried out in the same manner as a-1 except that 89 g of liquid anhydrous sulfuric acid (sulfane) was dropped, and a-4 was obtained by neutralizing with an aqueous sodium hydroxide solution.

a-5: sodium polyoxyethylene alkyl ether sulfate (NRES), R ¹ in the general formula (1) = linear alkyl group having 12 to 14 carbon atoms, average value of m = 1.0, M = sodium; The proportion of m = 0 compound (component (a0)) relative to the whole a-5 was 35% by mass.
[Preparation example of a-5]
Alcohol ethoxylate was obtained in the same manner as a-3 except that 91 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average added mole number of ethylene oxide of 1.0. In addition, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 35% by mass with respect to the entire alcohol ethoxylate obtained. Next, except that 89 g of liquid sulfuric anhydride (sulfan) was added dropwise, a sulfation reaction was carried out in the same manner as a-3, and neutralized with an aqueous sodium hydroxide solution to obtain sodium polyoxyethylene alkyl ether sulfate (a-5). )

a-6: Sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, m average value = 1.1, M = sodium; a-6 50% by mass of the compound of m = 0 (component (a0)) relative to the whole.
[Preparation example of a-6]
A-6 was obtained by mixing a'-2 and a'-3 described later at a mass ratio of a'-2 / a'-3 = 69/31.

a-7: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, average value of m = 1.0, M = sodium; a-7 The ratio of m = 0 compound (component (a0)) to the whole is 55% by mass.
[Preparation Example of a-7]
A-7 was obtained by mixing a'-2 and a'-3 described later at a mass ratio of a'-2 / a'-3 = 63/37.

-Comparison component of component (a) [hereinafter referred to as “component (a ′)”. ]
a′-1: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, average value of m = 0.3, M = sodium; -The ratio of the compound of m = 0 with respect to the whole (component (a0)) 76 mass%.
[Preparation example of a′-1]
Alcohol ethoxylate was obtained in the same manner as a-1 except that 27 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average addition mole number of ethylene oxide of 0.3. In addition, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 76% by mass with respect to the entire alcohol ethoxylate obtained. Next, except that 110 g of liquid sulfuric anhydride (sulfan) was added dropwise, a sulfation reaction was performed in the same manner as a-1, and a′-1 was obtained by neutralization with an aqueous sodium hydroxide solution.

a′-2: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, m average value = 1.8, M = sodium; -The ratio of the compound of m = 0 with respect to the whole (component (a0)) 27 mass%.
[Preparation example of a′-2]
Alcohol ethoxylate was obtained in the same manner as a-1 except that 164 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average addition mole number of ethylene oxide of 1.8. Further, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 27% by mass with respect to the whole alcohol ethoxylate obtained. Next, except that 84 g of liquid sulfuric anhydride (sulfan) was added dropwise, a sulfation reaction was performed in the same manner as a-1, and a′-2 was obtained by neutralizing with an aqueous sodium hydroxide solution.

a′-3: sodium alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, m = 0, M = sodium; 100% by mass of compound (component (a0)).
[Preparation example of a′-3]
After taking 237 g of a commercial name CO1270 alcohol manufactured by P & G as a raw material alcohol (mixture of 75/25 mass ratio of alcohol having 12 carbons and alcohol having 14 carbons) into a 500 mL flask equipped with a stirrer and replacing with nitrogen Then, 118 g of liquid sulfuric anhydride (sulfan) was slowly added dropwise while maintaining the reaction temperature at 40 ° C. After completion of dropping, stirring was continued for 1 hour (sulfation reaction) to obtain alkyl ether sulfuric acid. Subsequently, this was neutralized with an aqueous sodium hydroxide solution to obtain a′-3 (finally only the (a0) component).

a′-4: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, m average value = 1.2, M = sodium; -4 Ratio of compound of m = 0 (component (a0)) to the whole 28 mass%.
[Preparation example of a′-4]
Alcohol ethoxylate was obtained in the same manner as a-3 except that 109 g of ethylene oxide was introduced. The obtained alcohol ethoxylate had an average addition mole number of ethylene oxide of 1.2. In addition, the amount of the compound to which ethylene oxide was not added (final component (a0)) was 28% by mass with respect to the total alcohol ethoxylate obtained. Next, except that 93 g of liquid sulfuric anhydride (sulfan) was added dropwise, a sulfation reaction was carried out in the same manner as a-3 and neutralized with an aqueous sodium hydroxide solution to neutralize sodium polyoxyethylene alkyl ether sulfate (a′- 4) was obtained.

a′-5: sodium polyoxyethylene alkyl ether sulfate, R ¹ in the general formula (1) = a linear alkyl group having 12 to 14 carbon atoms, average value of m = 0.8, M = sodium; -60% by mass of m = 0 compound (component (a0)) with respect to the total.
[Preparation example of a′-5]
A′-5 was obtained by mixing a′-2 and a′-3 with a mass ratio of a′-2 / a′-3 = 54/46.

-(B) component b-1: AX, C12 alkyldimethylamine oxide (product name "Aromox DM12D-W" manufactured by Lion Akzo Co., Ltd.); R ⁴ in the general formula (4) = straight chain having 12 carbon atoms Alkyl group, R ⁵ = methyl group, R ⁶ = methyl group.

-Comparison component of component (b) [hereinafter referred to as "component (b ')". ]
b′-1: APAX, lauric acid amidopropyldimethylamine oxide (product name “Aromox APA-12W” manufactured by Lion Akzo Co., Ltd.); C ₁₁ H ₂₃ —C (═O) —NH—C ₃ H ₆ — N (CH ₃ ) (CH ₃ ) → O.

· (C) the component c-1: butyl diglycol (manufactured by Nippon Emulsifier Co., butyldiglycol (BDG)); the general formula (2) in ^{R 2} = butyl _{group, AO = CH 2 CH 2 O} , n = 2 .
c-2: Isopropyl diglycol (Nippon Emulsifier Co., Ltd., ethyl diglycol (iPDG)); R ² = isopropyl group, AO = CH ₂ CH ₂ O, n = 2 in the general formula (2).
c-3: Hexyl diglycol (manufactured by Nippon Emulsifier Co., Ltd., hexyl diglycol (HeDG)); R ² in formula (2) = hexyl group, AO = CH ₂ CH ₂ O, n = 2.
c-4: Phenoxyethanol, manufactured by Yokkaichi Chemical Co., Ltd .; R ² = phenyl group, AO = CH ₂ CH ₂ O, n = 1 in the general formula (2).
c-5: Phenoxy-2-propanol, manufactured by Yokkaichi Chemical Co., Ltd .; R ² = phenyl group, AO = CH ₂ CH (CH ₃ ) O, n = 2 in the general formula (2).

Component (c) Comparative component [hereinafter referred to as “(c ′) component”. ]
c′-1: methyl diglycol (manufactured by Nippon Emulsifier Co., Ltd., methyl diglycol (MDG)); R ² = methyl group, AO = CH ₂ CH ₂ O, n = 2 in the general formula (2).

(D) component d-1: polyoxyethylene lauric acid monoethanolamide (trade name “Amidette 2L-Y” manufactured by Kawaken Fine Chemical Co., Ltd.); R ³ = C ₁₁ H ₂₃ in the general formula (3), AO _{= CH 2 CH 2 O, s} = 2.

-Comparison component of component (d) [hereinafter referred to as “component (d ′)”. ]
d′-1: polyoxyethylene coconut oil fatty acid monoethanolamide (trade name “Amidette 10C” manufactured by Kawaken Fine Chemical Co., Ltd.); R ³ in general formula (3) = linear alkyl group derived from coconut oil; _{AO = CH 2 CH 2 O,} s = 10.

・ Other components Ethanol: Made by Junsei Co., Ltd., reagent grade.
p-Toluenesulfonic acid: trade name “pTSH” manufactured by Kyowa Hakko Chemical Co., Ltd.
Zinc oxide: manufactured by Mitsui Mining & Smelting Co., Ltd .; molecular weight 81, zinc atomic weight 65.
Citric acid: Citric acid (manufactured by Fuso Chemical Co., Ltd.) molecular weight 192.

Glycolic acid and sodium hydroxide were used as pH adjusters.
Glycolic acid: DuPont's trade name “Grip Pure 70”.
Na hydroxide: sodium hydroxide, manufactured by Nippon Soda Co., Ltd.
Water: tap water.

<Evaluation of liquid detergent>
Each liquid cleaning agent in each example was evaluated by the following evaluation methods, and the results were also shown in the table.

[Evaluation of detergency against oil stains]
1 g of beef tallow was applied uniformly on the entire inner surface of a tapper container having a length of 10 cm, a width of 15 cm, and a height of 5 cm to obtain a dirt model.
Next, 38 g of 25 ° C. tap water and 2 g of liquid detergent are taken into a sponge for dishwashing (product name: Scotch Bright, manufactured by Sumitomo 3M Co., Ltd.) measuring 11.5 cm long × 7.5 cm wide × 3 cm high. After rubbing by hand, the soil model was washed in the same way as is done at home.
Next, after rinsing well with tap water at 25 ° C., the tactile sensation when touching the portion of the inner surface of the tappa container on which the beef tallow was applied was evaluated.
This evaluation was performed according to the following evaluation criteria, and was used as an evaluation of the cleaning power against oil stains.
(Evaluation criteria)
A: No touch of oil was observed when touching any part of the tapper container, and no sliminess due to residual oil was felt.
○: When the bottom and side surfaces inside the tappa container were touched, there was no oil film, and no greasy feeling due to residual oil was felt, but a slight gut remained at the corners inside the tappa container.
(Triangle | delta): When the bottom surface inside a tapper container was touched, there was no film | membrane with oil and the sliminess by oil residue was not felt, but the sliminess remained in the side surface and corner | angular part inside a tapper container.
X: It was found that the entire tapper container was slippery, and oil remained clearly.

[Evaluation of foam resistance at drain outlet]
Take a dishwashing sponge (product name: Scotch Bright, Sumitomo 3M Co., Ltd., trade name: Scotch Bright) measuring 11.5 cm in length, 7.5 cm in width, and 3 cm in height. All of the foam after squeezing was placed on a dish (21 cm in diameter).
Next, the amount of water from the water tap was set to 100 mL / second, and the foam on the dish was rinsed to a kitchen sink equipped with a thin sink strainer having a diameter of 15 cm and a depth of 4 cm, and collected at the drain. . And the time until the bubble of this drain outlet disappeared completely was measured, and the foaming property in a drain outlet was evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: Bubbles completely disappeared within 60 seconds.
A: Bubbles completely disappeared within 90 seconds over 60 seconds.
◯: Bubbles completely disappeared within 120 seconds over 90 seconds.
○: Bubbles completely disappeared within 180 seconds over 120 seconds.
Δ: Bubbles completely disappeared within 210 seconds over 180 seconds.
X: It took 210 seconds or more for the bubbles to completely disappear.

[Evaluation of foaming property]
Take a dishwashing sponge (Sumitomo 3M Co., Ltd., product name: Scotch Bright) measuring 11.5 cm in length, 7.5 cm in width, and 3 cm in height. The state after foaming (the state of foam formation) was evaluated according to the following evaluation criteria. What was above evaluation ((circle), (circle)-(double-circle), (double-circle), (double-circle)) was determined to be good in foaming property.
(Evaluation criteria)
A: Foam covered the entire surface of the sponge.
○: The ratio of foam covering the sponge surface was less than 80% of the surface area of the sponge.
Δ: The ratio of foam covering the sponge surface was less than 50% of the surface area of the sponge.
X: The ratio of the foam covering the sponge surface was less than 30% of the surface area of the sponge.

  From the results shown in Tables 1 to 4, all of the liquid detergents of Examples 1 to 37 to which the present invention is applied are excellent in detergency against oil stains and foaming properties, and the foam breakage at the drain outlet is good. I understand that.

Claims (3)

The following general formula (1)

[Wherein, R ¹ represents a linear hydrocarbon group having 8 to 24 carbon atoms. m represents the number of repetitions of (CH ₂ CH ₂ O), and the average value of m is 0.5 to 1.5. M ⁺ is a counter ion. ]
An anionic surfactant (a) represented by:
An alkylamine oxide (b);
The following general formula (2)

[Wherein R ² represents a hydrocarbon group having 3 to 6 carbon atoms. n represents the average number of repetitions of A ¹ O and is a number of 1 to 5. A ¹ O represents an oxyalkylene group having 2 to 4 carbon atoms. ]
A compound (c) represented by:
Containing water,
The component (a) contains 35 to 55% by mass of the compound (a0) of m = 0 in the general formula (1) with respect to the total component (a),
The mass ratio represented by (a0) component / (b) component is 0.2 to 1.5,
(C) The liquid cleaning agent for kitchens whose mass ratio represented by a component / (a) component is 0.01-1. The following general formula (3)

[Wherein R ³ represents a hydrocarbon group having 5 to 17 carbon atoms. s represents the average number of repetitions of A ² O and is a number of 1 to 5. A ² O represents an oxyalkylene group having 2 to 4 carbon atoms. ]
The liquid detergent for kitchens of Claim 1 which further contains the compound (d) represented by these.   The liquid detergent for kitchens of Claim 2 whose mass ratio represented by (d) component / [(a) component + (b) component] is 0.1-1.