JP5520520B2 - Liquid detergent composition - Google Patents

Description

  The present invention relates to a liquid detergent composition.

In recent years, while consumers are becoming more aware of the environment and economy, there is a need for liquid detergents that can provide excellent cleaning effects even when used in the cleaning of dishes and cooking utensils.
Further, the liquid detergent for kitchen is required to have basic performance such as foamability in addition to cleanability.

As a liquid detergent excellent in foaming property, for example, Patent Document 1 discloses a liquid detergent composition containing an anionic surfactant and an amine oxide surfactant.
Patent Document 2 discloses a liquid detergent composition containing alkane sulfonate, magnesium ion, and alkylaryl sulfonate in a specific mixing ratio.

Japanese Patent Laid-Open No. 2004-352943 JP 2004-196987 A

By the way, the presence or absence of bubbles at the time of cleaning is an important factor for realizing the detergency, and a liquid detergent excellent in foaming is likely to realize the detergency. In addition, if the amount of foam is maintained, the detergency can be maintained.
However, the liquid detergent composition having excellent foaming properties as described in Patent Documents 1 and 2 easily feels so-called “foaming of foam” in which the amount of foam decreases in the cleaning process. The decrease in the amount of foam is due to the fact that the detergent concentration in the sponge is diluted by water during washing and the foam is broken by dirt such as oil, which is particularly noticeable in detergents with excellent foaming properties and strong detergency. Tend to happen. When the amount of foam decreases, the liquid detergent is often added during the washing, and the amount of liquid detergent used tends to increase.

On the other hand, the liquid detergent that is less likely to reduce the amount of foam and less likely to feel the foam is poorer in foaming than the liquid detergent excellent in foaming properties, and it is difficult to obtain a feeling of cleaning power.
As described above, it has been difficult to achieve both the sustainability of the amount of foam and the excellent cleaning power in the kitchen liquid cleaning agent.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid detergent composition having both the sustainability of the amount of foam and the excellent detergency even when used in the presence of oil. .

  The liquid detergent composition of the present invention contains a compound (A) represented by the following general formula (1), an anionic surfactant (B), and an amine oxide semipolar surfactant (C). In addition, 25% by mass or more of a compound having an acyl group having 10 carbon atoms is contained in 100% by mass of the compound (A).

In formula (1), R ¹ —CO— is an acyl group having 6 to 18 carbon atoms, EO is ethylene oxide, A ¹ O is alkylene oxide, and m is the average added mole number of A ¹ O. 1 to 2 .

Moreover, it is preferable that mass ratio represented by (A) / [(B) + (C)] is 0.1-0.5.
Moreover, 2-20 mass% of the compound (A), 5-50 mass% of the anionic surfactant (B), and 2-20 mass% of the amine oxide semipolar surfactant (C) are contained. It is preferable to do.

The liquid detergent composition of the present invention has both the sustainability of the foam amount and excellent cleaning power even when used in the presence of oil.
Moreover, since the liquid cleaning composition of this invention combines the sustainability of foam amount and the outstanding cleaning power, it can reduce the usage-amount.

Hereinafter, the present invention will be described in detail.
The liquid detergent composition of the present invention comprises a compound (A) represented by the general formula (1) (hereinafter referred to as “component (A)”) and an anionic surfactant (B) (hereinafter referred to as “( B) component ") and an amine oxide type semipolar surfactant (C) (hereinafter referred to as" component (C) ").

[(A) component]
(A) A component is a compound represented by the said General formula (1).
In the general formula (1), R ¹ —CO— is an acyl group having 6 to 18 carbon atoms. If the number of carbon atoms is 6 or more, the cleaning power is improved. On the other hand, if the carbon number is 18 or less, the solubility is good.
From the viewpoint of excellent balance between detergency and solubility, R ¹ —CO— is preferably an acyl group having 8 to 12 carbon atoms.

R ¹ is a hydrocarbon group having 5 to 17 carbon atoms. The hydrocarbon group may be linear or branched, and may be saturated or unsaturated. Among these, as the hydrocarbon group, an alkyl group or an alkenyl group is preferable, and a linear alkyl group is more preferable.
From the viewpoint of excellent balance between detergency and solubility, the hydrocarbon group preferably has 7 to 11 carbon atoms.

In the general formula (1), EO is ethylene oxide, and A ¹ O is alkylene oxide. Examples of A ¹ O include ethylene oxide, propylene oxide, butylene oxide, and the like. Among these, ethylene oxide is preferable from the viewpoint of excellent solubility.
m shows the average addition mole number of alkylene oxide, and is 1-5. From the viewpoint of obtaining an excellent cleaning effect, m is preferably 1 to 3, more preferably 1 to 2, and particularly preferably 1.

  The component (A) includes a compound having an acyl group having 10 carbon atoms (hereinafter sometimes referred to as “compound (A ′)”). Content of compound (A ') is 25 mass% or more in 100 mass% of (A) component, 50 mass% or more is preferable and 80 mass% or more is more preferable. When the content of the compound (A ′) is 25% by mass or more, the foaming property in the presence of oil is improved. Therefore, even when the liquid detergent composition of the present invention is used in the presence of oil, the foaming property is increased. It has excellent properties and can maintain both the amount of foam and excellent detergency. As a result, the amount of the liquid detergent composition used during the cleaning can be reduced.

The component (A) 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.
Specific examples of the component (A) include polyoxyethylene caprylic acid monoethanolamide, polyoxyethylene capric acid monoethanolamide, polyoxyethylene lauric acid monoethanolamide, polyoxypropylene caprylic acid monoethanolamide, Examples thereof include oxypropylene capric acid monoethanolamide, polyoxypropylene lauric acid monoethanolamide, polyoxybutylene caprylic acid monoethanolamide, polyoxybutylene capric acid monoethanolamide, polyoxybutylene lauric acid monoethanolamide, and the like.

(A) A component may be used individually by 1 type and may be used in mixture of 2 or more types.
The content of the component (A) is preferably 2 to 20% by mass, more preferably 3 to 15% by mass, and particularly preferably 4 to 10% by mass in 100% by mass of the liquid detergent composition. If content of (A) component is 2 mass% or more, the foam persistence in presence of oil will improve. On the other hand, even if the content of the component (A) exceeds 20% by mass, the improvement of the foam persistence reaches a peak.

[Component (B)]
The component (B) is an anionic surfactant.
As the component (B), an anionic surfactant having a hydrocarbon group having 8 to 18 carbon atoms is preferable.
The hydrocarbon group may be linear or branched, and may be saturated or unsaturated. Of these, the hydrocarbon group is preferably an alkyl group or an alkenyl group.

When the number of carbon atoms of the hydrocarbon group is less than 8, the hydrophobicity is lowered and it becomes difficult to obtain a sufficient detergency. On the other hand, when the carbon number of the hydrocarbon group exceeds 18, the solubility of the component (B) itself decreases, and the component (B) tends to precipitate during storage of the liquid detergent composition.
From the viewpoint of detergency and stability during storage, the number of carbon atoms of the hydrocarbon group is preferably 8 to 18, more preferably 10 to 16, and particularly preferably 12 to 14.

Such anionic surfactants include alkylbenzene sulfonates, polyoxyalkylene alkyl ether sulfates, alkyl sulfates, alkane sulfonates, α-olefin sulfonates, α-sulfo fatty acid salts, α-sulfo salts. Examples include fatty acid lower alkyl ester salts and fatty acids. Among these, polyoxyalkylene alkyl ether sulfate (AES) and alkane sulfonate (SAS) are preferable from the viewpoint of excellent balance between solubility and foamability.
Examples of the salt include alkali metal salts such as sodium and potassium, and alkanolamine salts such as monoethanolamine and diethanolamine.

Examples of AES include sodium polyoxyethylene alkyl ether sulfate having 8 to 18 carbon atoms (average number of added moles of ethylene oxide: 1 to 5).
As the SAS, commercially available products can be used, and examples thereof include “HOSTAPUR SAS 30A” and “HOSTAPUR SAS 60A” manufactured by Clariant Japan Co., Ltd.

(B) A component may be used individually by 1 type and may be used in mixture of 2 or more types.
The content of the component (B) is preferably 5 to 50% by mass, more preferably 7 to 40% by mass, and particularly preferably 10 to 30% by mass in 100% by mass of the liquid detergent composition. When the content of the component (B) is within the above range, an excellent cleaning effect can be obtained.

[Component (C)]
The component (C) is an amine oxide type semipolar surfactant.
(C) As a component, the amine oxide type | mold semipolar surfactant which has a C8-C16 hydrocarbon group is preferable.
The hydrocarbon group may be linear or branched, and may be saturated or unsaturated. Among these, as the hydrocarbon group, an alkyl group is preferable.

If the hydrocarbon group has 8 or more carbon atoms, the detergency is good. On the other hand, if the carbon number of the hydrocarbon group is 16 or less, the solubility is good.
From the viewpoint of better detergency and solubility, the hydrocarbon group preferably has 10 to 14 carbon atoms.

  Examples of such component (C) include semipolar surfactants such as alkyldimethylamine oxide, alkyldiethylamine oxide, alkanoylamide alkyldimethylamine oxide, and alkenyldimethylamine oxide. Especially as (C) component, the compound represented by the following general formula (2) or (3) is mentioned as a suitable thing.

In Formula (2), R ² is an alkyl group having 8 to 16 carbon atoms, a hydroxyalkyl group, an acylamidoalkyl group, or an alkylphenyl group, and R ³ and R ⁴ are the same or different, 3 is an alkyl group, a hydroxyalkyl group, or a polyoxyalkylene group, A ² O is an alkylene oxide having 2 to 4 carbon atoms, and n is an average added mole number of alkylene oxide, and is 0 to 3.
In formula (2), “N → O” represents a semipolar bond of amine oxide.

In Formula (3), R ⁵ is a linear alkyl group having 8 to 16 carbon atoms or a linear alkenyl group having 8 to 16 carbon atoms, and R ⁶ is an alkylene group having 1 to 5 carbon atoms. Each of R ⁷ and R ⁸ is the same or different and is an alkyl group or a hydroxyalkyl group having 1 to 3 carbon atoms, and X is —COO—, —CONH—, —OCO—, —NHCO—, or —O -.
In formula (3), “N → O” represents a semipolar bond of amine oxide.

As such component (C), alkyldimethylamine oxide and alkanoylamide alkyldimethylamine oxide are preferable from the viewpoint of excellent oil washing, and alkyldimethylamine oxide having an alkyl group having 10 to 14 carbon atoms and 10 to 14 carbon atoms. An alkanoylamidoalkyldimethylamine oxide having the following alkyl group is preferred. Among these, alkyldimethylamine oxide having an alkyl group having 10 to 14 carbon atoms is particularly preferable from the viewpoint of detergency, and specific examples include lauryldimethylamine oxide.
Moreover, as (C) component, a commercial item can be used, for example, "Aromox DM10D-W", "Aromox DMC-W", "Aromox DM12D-W (C)", made by Lion Akzo Corporation, " Aromox DM14D-N ";" Softazolin LAO-C "manufactured by Kawaken Fine Chemical Co., Ltd., and the like.

(C) A component may be used individually by 1 type and may be used in mixture of 2 or more types.
(C) 2-20 mass% is preferable in 100 mass% of liquid cleaning composition, 3-15 mass% is more preferable, and 4-10 mass% is especially preferable. If content of (C) component is 2 mass% or more, detergency will improve more by the synergistic effect with (B) component. On the other hand, if content of (C) component is 20 mass% or less, the viscosity increase of a liquid cleaning composition will be suppressed and fluidity | liquidity will become more favorable.

[Mass ratio of each component]
The liquid detergent composition of the present invention can have both the sustainability of the amount of foam and the excellent detergency by containing the components (A) to (C) described above. The present inventors have found that the sustainability of the amount of foam can be further improved by defining the mass ratio of each component.
That is, the mass ratio represented by (A) / [(B) + (C)] is preferably 0.1 to 0.5. If the mass ratio represented by (A) / [(B) + (C)] is 0.1 or more, the sustainability of the foam amount in the presence of oil can be further improved. On the other hand, even if the mass ratio represented by (A) / [(B) + (C)] exceeds 0.5, the improvement in the sustainability of the amount of foam reaches its peak.

[Optional ingredients]
In the liquid detergent composition of the present invention, other surfactants other than the components (A) to (C) and other components as needed, in addition to the components (A) to (C), as necessary, Can be blended.

Examples of other surfactants include polyoxyethylene alkyl ether, sorbitan fatty acid ester, polyoxyethylene fatty acid ester, alkyl glyceryl ether, alkyl polyglucoside, fatty acid glycoside ester, fatty acid methyl glycoside ester, alkyl methyl glucamide and the like. . In addition, amphoteric or amphoteric surfactants such as alkyl acetate betaines, alkanolamidopropyl acetate betaines, alkyl betaines, alkylhydroxysulfobetaines, alkylamido betaines, imidazolinium betaines, N-alkyl amino acids and the like may be used.
As for content of other surfactant, 1-20 mass% is preferable in 100 mass% of liquid cleaning composition.

Examples of other components include alkaline earth metal salts and disinfectants.
By blending an alkaline earth metal salt with the liquid detergent composition, the detergency especially against oil stains is further improved. The alkaline earth metal salt is preferably a compound that generates magnesium ions in the liquid detergent composition, and specific examples include magnesium sulfate, magnesium chloride, and magnesium hydroxide.
The content of the alkaline earth metal salt is preferably 0.01 to 0.5% by mass in 100% by mass of the liquid detergent composition.

On the other hand, a sterilization effect can be obtained by adding a sterilizing agent to the liquid detergent composition. As a disinfectant, zinc oxide is suitable.
The disinfectant content is preferably 0.01 to 0.5% by mass in 100% by mass of the liquid detergent composition.

In addition to the components described above, the liquid detergent composition of the present invention includes, for example, aromatic carboxylic acids such as aromatic sulfonates and benzoates as hydrotropes; ethanol, various flavor-modified ethanol, isopropanol, Water-soluble solvents such as polyethylene glycol and butyl carbitol; Hydroxycarboxylic acids such as glycolic acid, lactic acid, malic acid, citric acid, tartaric acid, and gluconic acid; polyvalent carboxylic acids such as oxalic acid, malonic acid, succinic acid, and fumaric acid ; Amino carboxylic acids such as ethylenediaminetetraacetic acid, nitriloacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid; high polyacrylic acid, polymaleic acid, copolymers of polyacrylic acid and polymaleic acid, etc. Molecular carboxylic acid type chelating agent; sodium sulfate Inorganic builders such as lithium and magnesium sulfate; pH adjusters such as sodium hydroxide, potassium hydroxide, sulfuric acid and short chain alkylbenzene sulfonic acid; viscosity adjusters, colorants, antioxidants, antiseptics, bactericides, anti-inflammatory agents, You may mix | blend normally used components, such as a medicinal ingredient, a fragrance | flavor, a natural extract.
In addition, the “short chain alkyl” in the short chain alkylbenzene sulfonic acid includes an alkyl group having 1 to 5 carbon atoms.

[Physical properties of liquid detergent composition: pH]
The liquid detergent composition preferably has a pH at 25 ° C. of 5.5 to 7.5, more preferably 6.0 to 7.0. The component (C) that is an amphoteric and / or semipolar surfactant is liable to cause a charge change depending on pH, and the interaction with the component (B) may change. When the pH is less than 5.5, the interaction between the component (A) and the component (C) becomes too strong, so that gelation or solidification tends to occur, and the low-temperature stability tends to deteriorate. On the other hand, when the pH is greater than 7.5, the interaction between the component (A) and the component (C) becomes too weak and the cleaning power tends to decrease.
The pH of the liquid detergent composition can be adjusted by the pH adjuster described above.
The pH of the liquid detergent composition (temperature adjusted to 25 ° C.) indicates a value measured by a pH meter or the like.

[Production of liquid detergent composition]
A liquid detergent composition can be manufactured according to a conventional method. For example, water (for example, purified water, distilled water, ion exchange) is used so that the above-described components (A) to (C) and optional components, if necessary, have a desired content in terms of the pure content of each component. It is obtained by dissolving and mixing in water, pure water, ultrapure water, etc.) and further adjusting to a predetermined pH using a pH adjuster as necessary.

  The liquid detergent composition of the present invention described above has both the sustainability of the foam amount and excellent cleaning power even when used in the presence of oil. As a result, the amount of the liquid detergent composition used during the cleaning can be reduced.

  Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto.

[Raw materials]
As the component (A), the following compounds were used.
A-1: polyoxyethylene caprylic acid monoethanolamide (in the general formula (1), R ¹ = alkyl group having 7 carbon atoms, A ¹ O = ethylene oxide, m = 1).
A-2: Polyoxyethylene capric acid monoethanolamide (in the above general formula (1), R ¹ = alkyl group having 9 carbon atoms, A ¹ O = ethylene oxide, m = 1).
A-3: polyoxyethylene lauric acid monoethanolamide (in the general formula (1), R ¹ = alkyl group having 11 carbon atoms, A ¹ O = ethylene oxide, m = 1).
A-4: Polyoxyethylene capric acid monoethanolamide (in the above general formula (1), R ¹ = alkyl group having 9 carbon atoms, A ¹ O = ethylene oxide, m = 2).

In addition, each (A) component was prepared as follows.
Preparation of A-3;
214 g of methyl laurate (“Pastel M-12” manufactured by Lion Corporation), 64.1 g of monoethanolamine (manufactured by Tokyo Chemical Industry Co., Ltd., reagent grade) and a 28% by mass methanol solution of sodium methoxide (Japan Corporation) While adding 7.7 g (1.0% by mass with respect to fatty acid methyl ester) produced by the catalyst and distilling off the by-product methanol under reduced pressure, the reaction pressure was 40 kPa to 1.3 kPa, and the reaction temperature was 90 ° C. The mixture was heated and stirred for 1 hour under the above conditions. When the reaction pressure reached 1.3 kPa, the mixture was aged at a reaction temperature of 90 ° C. for 3 hours to synthesize 240 g of lauric acid monoethanolamide.
Next, the synthesized lauric acid monoethanolamide was charged into a 1 L autoclave, 1.0 mol of ethylene oxide was charged with respect to lauric acid monoethanolamide, and the addition reaction was carried out at 90 ° C. for 2 hours. A mixture of acid monoethanolamides (A-3: polyoxyethylene fatty acid amide type surfactant) was synthesized.

Preparation of A-1:
A-1 was obtained in the same manner as A-3, except that methyl caprylate (“Pastel M-8” manufactured by Lion Co., Ltd.) having an equivalent molar ratio was used instead of methyl laurate. .

Preparation of A-2:
A-2 was obtained in the same manner as A-3, except that methyl caprate ("Pastel M-10" manufactured by Lion Corporation) with an equivalent molar ratio was used instead of methyl laurate. .

Preparation of A-4:
Instead of methyl laurate, an equivalent amount of methyl caprate ("Pastel M-10" manufactured by Lion Corporation) was used and ethylene oxide was charged in an amount of 2.0 moles relative to capric acid monoethanolamide. A-4 was obtained in the same manner as A-3 except that it was used in the above.

As the component (B), the following compounds were used.
B-1: AES (polyoxyethylene alkyl ether sulfate sodium ester).
B-2: SAS (secondary alkane sulfonate sodium, “HOSTAPUR SAS 30A” manufactured by Clariant Japan KK).

B-1 was prepared as follows.
Alcohol (“Neodol 23” manufactured by Shell Chemicals Japan Co., Ltd., alcohol having 12 carbons / alcohol having 13 carbons = 50 mass% / 50 mass% mixture, branching ratio: 20 mass%) is used as the raw material alcohol. It was.
Into a 4 L autoclave, 400 g of the above-mentioned raw material alcohol and 0.8 g of potassium hydroxide catalyst were charged, the inside of the autoclave was replaced with nitrogen, and the temperature was increased while stirring. Thereafter, 184 g of ethylene oxide was introduced while maintaining the temperature at 180 ° C. and the pressure of 0.3 mPa, to obtain a reaction product (alcohol ethoxylate) having an average addition mole number of ethylene oxide of 2. Moreover, the ethylene oxide addition mole number distribution measured by the high performance liquid chromatography (HPLC) on the following measurement conditions showed 33 mass% by the narrow rate.
Next, 280 g of the alcohol ethoxylate thus obtained was placed in a 500 mL flask equipped with a stirrer and purged with nitrogen. Then, 78 g of liquid sulfuric anhydride (sulfane) was slowly added dropwise while maintaining the reaction temperature at 40 ° C. After completion of the dropwise addition, stirring was continued for 1 hour (sulfation reaction) to obtain a polyoxyethylene alkyl ether sulfate. Next, this was neutralized with an aqueous sodium hydroxide solution to obtain sodium polyoxyethylene alkyl ether sulfate ester (B-1).

The narrow rate of B-1 was determined as follows.
Using HPLC, the distribution of ethylene oxide adducts with different numbers of added moles of ethylene oxide in the obtained synthetic product was measured under the following measurement conditions. And the narrow rate (mass%) of B-1 was computed based on the following numerical formula (S).
(Conditions for measuring the distribution of ethylene oxide adducts by HPLC)
Apparatus: LC-6A (manufactured by Shimadzu Corporation).
Detector: SPD-10A.
Measurement wavelength: 220 nm.
Column: Zorbax C8 (manufactured by DuPont).
Mobile phase: acetonitrile / water = 60/40 (volume ratio).
Flow rate: 1 mL / min.
Temperature: 20 ° C.

In the formula (S), n _max represents the number of moles of alkylene oxide added in the alkylene oxide adduct most present in the entire alkylene oxide adduct. i represents the number of added moles of alkylene oxide. Yi represents the proportion (mass%) of the alkylene oxide adduct having an added mole number of alkylene oxide present in the entire alkylene oxide adduct.

As the component (C), the following compounds were used.
C-1: lauric acid amidopropyl dimethylamine oxide, “Softazoline LAO-C” manufactured by Kawaken Fine Chemical Co., Ltd.
C-2: Lauryldimethylamine oxide, “Aromox DM12D-W (C)” manufactured by Lion Akzo Corporation.

As a comparative component of the component (A), the following compounds were used.
LDE: lauric acid diethanolamide: “Amizole LDE” manufactured by Kawaken Fine Chemical Co., Ltd.
CME (1): polyoxyethylene (1) coconut oil fatty acid monoethanolamide (average added mole number of ethylene oxide: 1).

CME (1) was prepared as follows.
CME (1) was synthesized by adding 1.0 mole of ethylene oxide to “Amizole CME” manufactured by Kawaken Fine Chemical Co., Ltd. The coconut oil fatty acid contains about 7.0% by mass of capric acid.

The following reagents were used as optional components.
・ Ethanol: Pure Chemical Co., Ltd.
Polyethylene glycol: “PEG # 1000” manufactured by Lion Corporation (average molecular weight: 1000).
Magnesium sulfate: “Magnesium sulfate 7 hydrate (MgSO ₄ .7H ₂ O)” manufactured by Ako Kasei Co., Ltd.
・ Glycolic acid: “Grip Pure 70” manufactured by DuPont
-Fragrance | flavor: The fragrance | flavor composition A of Tables 7-14 of Unexamined-Japanese-Patent No. 2003-268398.

[Examples 1-9, Comparative Examples 1-7]
<Preparation of liquid detergent composition>
After mixing each component according to the formulation shown in Tables 1 and 2, add a proper amount of pH adjuster (sodium hydroxide or sulfuric acid) so that the pH at 25 ° C. is 6.7, and the liquid cleaning of each example Each agent composition was prepared.
In addition, the unit of the compounding quantity in Table 1, 2 is the mass%, and all components show the amount equivalent to a pure part. The liquid detergent composition of each example was adjusted with a balance amount of purified water so that the total of each component described in the table was 100% by mass.
The pH was measured by adjusting the liquid detergent composition to 25 ° C. and using a glass electrode type pH meter (product name: Horiba F-22, manufactured by Horiba, Ltd.). The measuring method was performed based on JIS K3362-1998.

<Evaluation>
(Evaluation of foam amount)
The sustainability of the foam amount of the liquid detergent composition was evaluated by evaluating the foam amount by the method described below under the conditions of a low detergent concentration in which the addition of the detergent was induced and in the presence of oil.
First, the liquid detergent composition was diluted with tap water so as to have a concentration of 0.2% by mass to prepare a diluted solution.
20 mL of the diluted solution prepared above was put into a glass cylindrical tube having an inner diameter of 3 cm and a height of 25 cm, and 2 g of commercially available olive oil (Ajinomoto Co., Inc.) was added.
Next, the mixture was incubated at 25 ° C. and then shaken for 1 minute using a shaker. The height (mm) of the foam immediately after stopping was measured, and the amount of foam was evaluated based on the following evaluation criteria. The results are shown in Tables 1 and 2.
A: The height of the foam is 60 mm or more.
A: The height of the foam is 40 mm or more and less than 60 mm.
(Triangle | delta): The height of a bubble is 20 mm or more and less than 40 mm.
X: The bubble height is less than 20 mm.

(Evaluation of cleaning power)
1 g of beef tallow (manufactured by Wako Pure Chemical Industries, Ltd.) was applied uniformly on the entire inner surface of a plastic container measuring 10 cm in length × 15 cm in width × 5 cm in height. did.
Next, the above container in which beef tallow was applied after taking 38 g of tap water and 2 g of the liquid detergent composition in a dishwashing sponge measuring 11.5 cm long x 7.5 cm wide x 3 cm high, respectively, Was washed in the same manner as that usually performed at home using tap water of 25 ° C. After washing, the rinse was thoroughly rinsed with tap water, and the detergency was evaluated based on the following evaluation criteria with the tactile sensation when the part (contaminated part) on which the beef tallow was applied was touched by hand. The results are shown in Tables 1 and 2.
A: When touching any part of the container, there is a feeling of friction that makes a squeak and noise, and no sliminess due to the remaining beef tallow is felt at all.
○: Touching the bottom and side surfaces of the container gives a feeling of friction, and no sliminess due to the remaining beef tallow is felt, but a slight luster is felt at the corners of the container.
Δ: When the bottom surface of the container is touched, there is a feeling of friction, and there is no feeling of sliminess due to the remaining beef tallow, but there is a feeling of slimness on the sides and corners of the container.
X: The whole container is felt slim and beef tallow remains clearly.

As is clear from Table 1, the liquid detergent composition obtained in each example was excellent in bubble power and was able to maintain a sufficient amount of foam and showed high detergency. In Examples 3 and 4, the evaluation of the amount of foam was “◯”, but the specific value of the amount of foam (the height of the foam) was 54 mm in Example 3 and Example 4 In this case, the evaluation of the amount of foam was superior to that of Example 4.
According to the liquid detergent composition of the present invention, by including the components (A) to (C), it is possible to achieve both the sustainability of the foam amount and the excellent detergency even when used in the presence of oil. As a result, the amount of the liquid detergent composition used during the cleaning can be reduced.

On the other hand, as is clear from Table 2, the liquid detergent compositions obtained in Comparative Examples 1 to 4 that do not contain the compound (A-2) or (A-4) having an acyl group having 10 carbon atoms, (A ) The liquid cleaning composition obtained in Comparative Example 7 in which the proportion of the compound (A-2) in the component is 20% by mass, the same component as the compound (A-2) as the comparative component of the component (A) ( Although the liquid detergent composition obtained in Comparative Example 5 using CME (1) containing about 7% by mass of capric acid was evaluated as having the same detergency as each Example, the amount of foam was evaluated. Was inferior.
In the liquid detergent composition obtained in Comparative Example 6, the ratio of the compound (A-2) in the component (A) was 100% by mass. Since the component (C) is not contained, the detergency is remarkably reduced.

Claims (3)

Containing a compound (A) represented by the following general formula (1), an anionic surfactant (B), and an amine oxide semipolar surfactant (C);
A liquid detergent composition comprising 25% by mass or more of a compound having an acyl group having 10 carbon atoms in 100% by mass of the compound (A).

[In formula (1), R ¹ —CO— is an acyl group having 6 to 18 carbon atoms, EO is ethylene oxide, A ¹ O is alkylene oxide, and m is the average added mole number of A ¹ O. It is 1-2 . ]   The liquid detergent composition according to claim 1, wherein a mass ratio represented by (A) / [(B) + (C)] is 0.1 to 0.5. 2-20% by mass of the compound (A), 5-50% by mass of the anionic surfactant (B), and 2-20% by mass of the amine oxide type semipolar surfactant (C). The liquid cleaning composition of Claim 1 or 2 characterized by these.