JP2015000951A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentration-type liquid detergent composition having a suitable viscosity before and after dilution.SOLUTION: There is provided a liquid detergent composition which comprises: (A) 1 to 30 wt.% of a fatty acid N-methylalkanolamide; (B) 10 to 60 wt.% of an anionic surfactant; and (C) 1 to 20 wt.% in total of at least one selected from the group consisting of an amphoteric surfactant and a nonionic surfactant as essential components and contains no fatty acid ethanolamides represented by the following general formulas (1) and (2) and alkylbenzenesulfonates. In the formula (1), R-CO- represents a saturated or unsaturated acyl group which may have a hydroxyl group. In the formula (2), R-CO- represents a saturated or unsaturated acyl group which may have a hydroxyl group.

Description

The present invention relates to a concentrated liquid detergent composition that is diluted during washing.

2. Description of the Related Art Conventionally, tableware detergents used for washing tableware, kitchen utensils, vegetables, fruits and the like are mainly in liquid form. In such a liquid detergent for tableware, an anionic surfactant is used as a main component as a surfactant from the viewpoint of detergency. Among them, linear alkylbenzene sulfonate (LAS) is often used because it has high detergency and foaming power (foaming property) and can be obtained at low cost.

In the detergent for tableware, in order to improve usability, it is calculated | required to have the outstanding foaming property and foam retention. However, since only the linear alkylbenzene sulfonate (LAS) does not have sufficient foamability and foam retention, fatty acid monoethanolamide or fatty acid diethanolamide is used as a foaming agent. In particular, fatty acid diethanolamide exhibits a high effect on the thickening of the detergent, so that it is difficult for the detergent to flow down from the sponge or the like when used, and the concentration of the detergent contained in the sponge or the like can be kept high. .

Thus, as a liquid detergent composition having excellent detergency, foamability and foam retention and having an appropriate viscosity, for example, in Patent Documents 1 and 2, linear alkylbenzene sulfonate and fatty acid diethanolamine are used. Disclosed is a liquid detergent composition comprising

JP 7-316589 A Japanese Patent Laid-Open No. 8-3587

However, in recent years, the use of LAS has been avoided from the viewpoint of water quality conservation related to the conservation of aquatic organisms. Moreover, since LAS has a strong degreasing power and causes rough hands, there is an increasing need for non-LAS detergents that do not contain LAS.
Furthermore, since fatty acid monoethanolamide is solid at room temperature, there is a problem that workability during production is poor, and there is a concern that fatty acid diethanolamide may generate nitrosamine, which is a carcinogenic substance.

Also, concentrated liquid detergent compositions that use high-concentration detergent diluted with water are demanded from the viewpoint of environmental load, mainly for commercial tableware detergent.
A dilution ratio of 2 to 4 times is often used. In such a concentrated liquid detergent composition, it is desirable to have a viscosity suitable for use after dilution. In consideration of workability during production, it is desirable that the viscosity of the concentrated liquid cleaning composition itself is not too high.
In addition, the liquid detergent composition is desired to have a transparent appearance that does not cause separation or cloudiness when stored for a long period of time.

The present invention has been made to solve the above-described problem, and is a liquid detergent composition that does not contain a specific fatty acid monoethanolamide, fatty acid diethanolamide, and linear alkylbenzene sulfonate that are solid at room temperature. An object of the present invention is to provide a concentrated liquid detergent composition having an appropriate viscosity before and after dilution.

In order to achieve the above-mentioned object, the liquid detergent composition of the present invention is a concentrated liquid detergent composition that is diluted during washing, and comprises (A) fatty acid N-methylalkanolamide 1 to 30 wt. %, (B) 10 to 60% by weight of an anionic surfactant, and (C) at least one selected from the group consisting of an amphoteric surfactant and a nonionic surfactant in a total of 1 to 20% by weight. As an essential component and not containing fatty acid monoethanolamide represented by the following general formula (1), fatty acid diethanolamide represented by the following general formula (2), and linear alkylbenzene sulfonate It is characterized by.
In addition, unless otherwise indicated, the density | concentration (weight%) of each component in this specification is defined as the density | concentration in the pure part of each component in a liquid cleaning composition.

In the formula, R ¹ —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group.

In the formula, R ² —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group.

The liquid detergent composition of the present invention contains 1 to 30% by weight of the component (A). When 1 to 30% by weight of the above (A) is contained, a cleaning composition having an appropriate viscosity before and after dilution is obtained.
When the content of the component (A) is less than 1% by weight, the viscosity of the cleaning composition and the viscosity after dilution are lowered.
If the content of the component (A) exceeds 30% by weight, the content of the component (A) is too high and the viscosity of the liquid detergent composition becomes too high. Moreover, content of (B) component which exhibits the outstanding cleaning power decreases. As a result, the cleaning power of the liquid cleaning composition is inferior.

The liquid detergent composition of the present invention contains 10 to 60% by weight of the component (B). When the component (B) is contained in an amount of 10 to 60% by weight, an excellent detergency can be exhibited during cleaning.
When the content of the component (B) is less than 10% by weight, the detergency is inferior and the viscosity after dilution is lowered. Moreover, it becomes difficult to maintain the transparent appearance of the liquid detergent composition.
Moreover, when content of the said (B) component exceeds 60 weight%, there is too much content of the said (B) component, and content of the (A) component which exhibits the outstanding thickening effect will decrease. As a result, the viscosity after dilution decreases. Moreover, it becomes difficult to maintain a transparent appearance.

The liquid detergent composition of the present invention contains 1 to 20% by weight of the component (C). When the component (C) is contained in an amount of 1 to 20% by weight, the viscosity when diluted and used can be maintained appropriately.
When the content of the component (C) is less than 1% by weight, the viscosity when diluted and used is too low, and it tends to flow off from a sponge or the like. Moreover, when content of the said (C) component exceeds 20 weight%, the viscosity of a liquid detergent composition will become high too much, and the handleability at the time of manufacture will worsen. Moreover, it becomes difficult to maintain a transparent appearance.

The liquid detergent composition of the present invention preferably has a pH of 7.0 or higher. When the pH is 7.0 or more, the transparency of the liquid detergent composition is improved.

In the liquid detergent composition of the present invention, (B) the anionic surfactant is an alkane sulfonate, an α-olefin sulfonate, an alkyl sulfate, an alkyl sulfosuccinate, a polyoxyalkylene alkyl ether sulfate, Desirably, it is at least one selected from the group consisting of a polyoxyalkylene alkenyl ether sulfate ester salt, a polyoxyalkylene alkyl ether carboxylic acid ester salt, and a polyoxyalkylene alkenyl ether carboxylic acid ester salt.
The (B) anionic surfactant is an alkane sulfonate, an α-olefin sulfonate, an alkyl sulfate, an alkyl sulfosuccinate, a polyoxyalkylene alkyl ether sulfate, a polyoxyalkylene alkenyl ether sulfate, If it is at least one selected from the group consisting of a polyoxyalkylene alkyl ether carboxylic acid ester salt and a polyoxyalkylene alkenyl ether carboxylic acid ester salt, the detergency of the liquid detergent composition can be further improved.

In the liquid detergent composition of the present invention, (B) the anionic surfactant is an alkane sulfonate, an α-olefin sulfonate, an alkyl sulfate, an alkyl sulfosuccinate, a polyoxyalkylene alkyl ether sulfate, At least one selected from the group consisting of a polyoxyalkylene alkenyl ether sulfate ester salt, a polyoxyalkylene alkyl ether carboxylate ester salt, and a polyoxyalkylene alkenyl ether carboxylate salt, and a polyoxyalkylene alkyl ether sulfate ester The total content of the salt and the polyoxyalkylene alkenyl ether sulfate salt is preferably less than 15% by weight.
When the total content of the polyoxyalkylene alkyl ether sulfate ester salt and the polyoxyalkylene alkenyl ether sulfate ester salt is less than 15% by weight, the low-temperature stability of the liquid detergent composition is improved.

The liquid detergent composition of the present invention is a concentrated liquid detergent composition having an appropriate viscosity before and after dilution even if it does not contain a specific fatty acid monoethanolamide, fatty acid diethanolamide, and linear alkylbenzene sulfonate. It becomes a thing.

Hereinafter, the present invention will be specifically described. However, the present invention is not limited to the following embodiments, and can be applied with appropriate modifications without departing from the scope of the present invention.

First, the liquid detergent composition of the present invention will be described.
The liquid detergent composition of the present invention is a concentrated liquid detergent composition that is diluted during washing, and comprises (A) 1 to 30% by weight of fatty acid N-methylalkanolamide, and (B) an anion. 10 to 60% by weight of surfactant, and (C) at least one selected from the group consisting of amphoteric surfactants and nonionic surfactants as a total component of 1 to 20% by weight, and The fatty acid monoethanolamide represented by the following general formula (1), the fatty acid diethanolamide represented by the following general formula (2), and a linear alkylbenzene sulfonate are not included.

In the formula, R ¹ —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group.

In the formula, R ² —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group.

The component (A) refers to a compound represented by the following general formula (3).

In the formula, R ³ —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group. R ⁴ represents a linear or branched alkylene group or a linear or branched alkenylene group.

In the general formula (3), R ³ —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group, and in particular, saturated which may have a hydroxyl group having 6 to 24 carbon atoms. Or it is preferable that it is an unsaturated acyl group, and it is more preferable that it is a C8-C18 saturated or unsaturated acyl group.

Specific examples of R ³ —CO— include octanoic acid, decanoic acid, dodecanoic acid, lauric acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, docosanoic acid, linoleic acid, isostearic acid, oleic acid, coconut oil fatty acid, palm Examples include acyl groups derived from oil fatty acids or palm kernel oil fatty acids. Preferably, it is an acyl group derived from coconut oil fatty acid, lauric acid or the like. These may be used alone or in combination of two or more.

In the general formula (3), R ⁴ represents a linear or branched alkylene group or a linear or branched alkenylene group, and in particular, a linear or branched alkylene group having 1 to 6 carbon atoms. Or it is preferable that it is a C2-C6 linear or branched alkenylene group, and it is more preferable that it is an ethylene group.
From the preferable combination of R ³ and R ⁴ , coconut oil fatty acid N-methylethanolamide is most preferable as the component (A).

The component (A) is contained in an amount of 1 to 30% by weight in the liquid detergent composition of the present invention. More preferably, it is 3-22 weight%, More preferably, it is 3-13 weight%.
(A) When two or more types of components are contained, the said content is defined as the sum total of content of each (A) component.

Examples of the component (B) include alkane sulfonate (SAS), α-olefin sulfonate (AOS), alkyl sulfate (AS), alkyl sulfosuccinate, polyoxyalkylene alkyl ether sulfate, polyoxyalkylene. It is preferably at least one selected from the group consisting of alkenyl ether sulfate ester salt, polyoxyalkylene alkyl ether carboxylic acid ester salt, and polyoxyalkylene alkenyl ether carboxylic acid ester salt. In particular, from the viewpoint of being suitable for the preparation of a concentrated liquid detergent composition, alkane sulfonate (SAS), alkyl sulfate (AS), polyoxyethylene alkyl ether sulfate (AES), and poly More preferably, it is at least one selected from the group consisting of oxyethylene alkenyl ether sulfate (AES).

Examples of the salt include alkali metal salts such as potassium and sodium, and alkaline earth metal salts such as magnesium and calcium. Among these, alkali metal salts are preferable, and sodium salts are more preferable from the viewpoint of economy.

Examples of the alkane sulfonate (SAS) include sodium secondary alkane sulfonate having 8 to 18 carbon atoms and potassium secondary alkane sulfonate having 8 to 18 carbon atoms. In particular, sodium secondary alkanesulfonate having 12 carbon atoms is preferable. These may be used alone or in combination of two or more.

Examples of the α-olefin sulfonate (AOS) include sodium α-olefin sulfonate having 8 to 18 carbon atoms and potassium α-olefin sulfonate having 8 to 18 carbon atoms. In particular, sodium α-olefin sulfonate having 14 carbon atoms is preferable. These may be used alone or in combination of two or more.

Examples of the alkyl sulfate (AS) include sodium alkyl sulfate having 8 to 18 carbon atoms and potassium alkyl sulfate having 8 to 18 carbon atoms. In particular, sodium dodecyl sulfate is more preferable. These may be used alone or in combination of two or more.

Examples of the alkylsulfosuccinate include sodium alkylsulfosuccinate having 8 to 18 carbon atoms and sodium polyoxyethylene alkylsulfosuccinate having 8 to 18 carbon atoms. Particularly preferred is disodium lauryl polyoxyethylene sulfosuccinate. These may be used alone or in combination of two or more.

Examples of the polyoxyalkylene alkyl ether sulfate ester salt and polyoxyalkylene alkenyl ether sulfate ester salt include polyoxyethylene alkyl ether sulfate ester salt (AES) and polyoxyethylene alkenyl ether sulfate ester salt (AES).
Particularly preferred are sodium polyoxyethylene lauryl ether sulfate and sodium polyoxyethylene tridecyl ether sulfate. These may be used alone or in combination of two or more.

Examples of polyoxyalkylene alkyl ether carboxylic acid ester salts and polyoxyalkylene alkenyl ether carboxylic acid ester salts include polyoxyethylene alkyl ether carboxylic acid ester salts and polyoxyethylene alkenyl ether carboxylic acid esters.
In particular, sodium polyoxyethylene lauryl ether carboxylate and sodium polyoxyethylene tridecyl ether carboxylate are more preferable. These may be used alone or in combination of two or more.

Preferred combinations when two or more of the above components (B) are used in combination include polyoxyethylene alkyl ether sulfate (AES), alkane sulfonate (SAS) and alkyl sulfosuccinate, polyoxyethylene alkyl Combinations of ether sulfate (AES), α-olefin sulfonate (AOS) and alkane sulfonate (SAS), polyoxyethylene alkyl ether sulfate (AES), α-olefin sulfonate (AOS) and Examples include combinations of alkyl sulfates (AS), polyoxyethylene alkyl ether sulfates (AES), and alkane sulfonates (SAS). Among these combinations, a combination of polyoxyethylene alkyl ether sulfate (AES) and alkane sulfonate (SAS) is more preferable.

The component (B) is contained in an amount of 10 to 60% by weight in the liquid detergent composition of the present invention. More preferably, it is 10-50 weight%, More preferably, it is 10-40 weight%.
When multiple types of (B) component are contained, the said content is defined as the sum total of content of each (B) component.

Among the components (B), the total content of polyoxyalkylene alkyl ether sulfate and polyoxyalkylene alkenyl ether sulfate is preferably less than 15% by weight. More preferably, it is 14 weight% or less, More preferably, it is 13 weight% or less. Further, it is preferably 1% by weight or more, more preferably 3% by weight or more, and further preferably 5% by weight or more.

The amphoteric surfactant contained in the component (C) includes alkylamine oxide (AO) having 8 to 18 carbon atoms, alkylamidopropylbetaine (ApB) having 8 to 18 carbon atoms, and alkylamino having 8 to 18 carbon atoms. Examples include fatty acid salts and alkylbetaines having 8 to 18 carbon atoms. In particular, alkylamine oxide (AO) having 10 or 14 carbon atoms and alkylamidopropylbetaine (ApB) having 12 carbon atoms are more preferable. These may be used alone or in combination of two or more.

As the nonionic surfactant contained in the component (C), polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene alkylphenyl ether, Polyoxyethylene polyoxypropylene glycol, sucrose fatty acid ester, alkyl (poly) glucoside, monoglycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, ethylene oxide adduct of sorbitan fatty acid ester, alkylene oxide adduct of sorbitan fatty acid ester Etc. Specific examples include polyoxyethylene tridecyl ether, polyoxyethylene branched decyl ether, polyoxyethylene lauryl ether, and alkyl glucoside. These may be used alone or in combination of two or more.
In addition, the nonionic surfactant in this specification does not contain fatty acid N-methyl alkanolamide, fatty acid monoethanolamide represented by general formula (1), and fatty acid diethanolamide represented by general formula (2). It is.

The component (C) is contained in the liquid detergent composition of the present invention in an amount of 1 to 20% by weight as the total amount of the amphoteric surfactant and the nonionic surfactant. More preferably, it is 1-15 weight%, More preferably, it is 1-10 weight%.
When multiple types of (C) component are contained, the said content is defined as the sum total of content of each (C) component.

The liquid detergent composition of the present invention desirably contains at least one selected from the group consisting of (D) an alkali metal-containing compound and an alkaline earth metal-containing compound.
Examples of the component (D) include alkali metal salts (sodium chloride, potassium chloride, etc.) as alkali metal-containing compounds, alkali metal hydroxides (sodium hydroxide, potassium hydroxide, etc.), and alkaline earth metal-containing compounds. Examples include alkaline earth metal salts (such as magnesium chloride) and alkaline earth metal hydroxides (such as magnesium hydroxide). These may be used alone or in combination of two or more. In particular, sodium chloride is more preferable.

When the component (D) is contained, the viscosity of the concentrated liquid detergent composition can be easily maintained moderately before and after dilution, and the workability during production is further improved. In addition, the pH of the liquid detergent composition can be adjusted to an appropriate range.

(D) It is preferable that content of a component is 1 weight% or more in total. More preferably, it is 2% by weight or more. Moreover, it is preferable that it is 15 weight% or less, and it is more preferable that it is 10 weight% or less.
When multiple types of (D) component are contained, the said content is defined as the sum total of content of each (D) component.

The liquid detergent composition of the present invention preferably contains (E) an organic solvent.
As the component (E), monohydric alcohols or polyhydric alcohols can be suitably used. For example, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methoxy Examples include ethanol, 2-ethoxyethanol, ethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, glycerin, polyethylene glycol, and polypropylene glycol. In particular, ethanol, propylene glycol, glycerin, polyethylene glycol, and polypropylene glycol are preferable. These may be used alone or in combination of two or more.

When the component (E) is included, it becomes easy to suppress the viscosity of the concentrated liquid detergent composition to a range where the viscosity is not too high, and the workability during the production is further improved. Moreover, it becomes easy to maintain the transparent appearance of the liquid detergent composition, and separation of components hardly occurs during production and storage.

(E) It is preferable that content of a component is 1 weight% or more. More preferably, it is 2% by weight or more. Moreover, it is preferable that it is 15 weight% or less, and it is more preferable that it is 10 weight% or less.
When multiple types of (E) component are contained, the said content is defined as the sum total of content of each (E) component.

The liquid detergent composition of the present invention preferably has a pH of 7.0 or higher. More preferably, it is 7.4 or more. Moreover, it is preferable that it is 9.0 or less, and it is more preferable that it is 8.0 or less.
In consideration of use in washing vegetables, fruits, etc., the pH of the liquid detergent composition is the standard for food and additives based on the Food Sanitation Law (December 28, 1959, Ministry of Health and Welfare Notification No. 370) It is desirable to satisfy the pH 6.0 to 8.0 determined in (1) at the time of 150-fold dilution.
The pH can be measured by the method described in JIS Z 8802.

The liquid detergent composition of the present invention is a concentrated liquid detergent composition, but the viscosity at 20 ° C. is 100 to 1000 mPa as the viscosity of the liquid detergent composition before dilution (hereinafter also referred to as the viscosity of the stock solution). -It is preferable that it is s. The viscosity of the stock solution is more preferably 100 to 650 mPa · s.
When the viscosity of the stock solution is 100 to 650 mPa · s, the viscosity of the liquid detergent composition is in an appropriate range, and workability during production is improved.
If the viscosity of the undiluted solution is less than 100 mPa · s, the cleaning agent may easily flow down from the sponge or the like. On the other hand, when the viscosity of the stock solution exceeds 650 mPa · s, the workability during the production may be inferior.
The viscosity of the stock solution is more preferably 100 to 500 mPa · s.
In addition, the measurement of the viscosity of a liquid detergent composition can be performed using an E-type viscosity meter based on JISZ8803.

The liquid detergent composition of the present invention preferably has a composition with a viscosity at 25 ° C. of 100 to 1000 mPa · s when diluted with water four times. Even if the liquid detergent composition of the present invention is diluted with water, it preferably has a viscosity equal to or higher than that of the undiluted stock solution. When the viscosity of the diluent is within the above range, the diluent does not easily flow down from the sponge or the like, and the detergent concentration contained in the sponge or the like can be kept high.
When the viscosity of the diluent is less than 100 mPa · s, the diluent may easily flow down from the sponge or the like. In addition, adjusting the composition so that the viscosity of the diluted solution exceeds 1000 mPa · s results in excessively high viscosity of the undiluted undiluted solution, which may impair the appearance of the liquid detergent composition (undiluted solution) or work during production. May be inferior.
The viscosity of the diluted liquid diluted with water of the liquid detergent composition is more preferably 100 to 1000 mPa · s, and further preferably 200 to 650 mPa · s.
Moreover, it is preferable that the liquid cleaning composition of this invention is a composition from which the viscosity in 25 degreeC will be 200-650 mPa * s in any dilution liquid diluted 2 to 4 times with water.

The liquid detergent composition of the present invention may further contain a pH adjuster for adjusting to a desired pH as necessary.
Examples of the pH adjuster include alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, carbonates such as sodium carbonate, sodium bicarbonate, potassium carbonate, and potassium bicarbonate, sodium orthosilicate, sodium metasilicate, and orthosilicate potassium. And silicates such as potassium metasilicate, and phosphates such as sodium phosphate, sodium hydrogen phosphate, potassium phosphate, potassium hydrogen phosphate, and the like. These may be used alone or in combination of two or more.
The blending amount of the pH adjusting agent is not particularly limited, but it is preferably added so that the pH of the liquid detergent composition is 7.0 or more, more preferably 7.4 or more. Moreover, it is preferable to add so that pH may be 9.0 or less, More preferably, it is 8.0 or less.

The liquid detergent composition of the present invention may further contain water.
Examples of the water include tap water, distilled water, pure water, and ion exchange water. These may be used alone or in combination of two or more. In particular, ion-exchanged water is desirable from the viewpoint of few impurities and economical efficiency.

The water is the sum of water contained in the form of crystal water or aqueous solution derived from each component constituting the liquid detergent composition in the liquid detergent composition of the present invention and water added from the outside. The balance amount is blended so that the whole composition becomes 100% by weight.

The liquid detergent composition of the present invention may further contain a chelating agent.
Although it does not specifically limit as a chelating agent, Aminocarboxylic acid type | system | group, hydroxycarboxylic acid type | system | group, phosphoric acid type | system | group, polyacrylic acid, acrylic acid / maleic acid copolymers, ether carboxylate, and low One or more selected from organic acid salts of molecular weight can be used.
Examples of aminocarboxylic acids include diethylenetriaminepentaacetic acid (DTPA), ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), triethylenetetraminehexaacetic acid (TTHA), dicarboxymethylglutamate. Mick acid (GLDA), hydroxyethyliminodiacetic acid (HIDA), dihydroxyethylglycine (DHEG), 1,3-propanediaminetetraacetic acid (PDTA), 1,3-diamino-2-hydroxypropanehexaacetic acid (DPTA-OH) ) Or a salt thereof.
Examples of the hydroxycarboxylic acid type include malic acid, succinic acid, citric acid, lactic acid, tartaric acid or salts thereof (for example, sodium salt, potassium salt, etc.).
Examples of the phosphoric acid system include hydroxyethylidene diphosphonic acid (HEDP), nitrilotrimethylenephosphonic acid (NTMP), phosphonobutanetricarboxylic acid (PBTC), hexametaphosphoric acid, and salts thereof.
The low molecular weight organic acid salt means one having a molecular weight of 1000 or less. Examples of the organic acid salt having such a molecular weight include malic acid, succinic acid, citric acid, lactic acid, tartaric acid and salts thereof (for example, sodium salt, potassium salt, etc.), and specifically sodium citrate. Citrates such as calcium citrate, malates such as sodium malate and calcium malate, and gluconates such as sodium gluconate and calcium gluconate.
When a chelating agent is included, the blending amount is preferably 0.1 to 1.0% by weight.

The liquid detergent composition of the present invention may further contain a solubilizer.
The solubilizer is not particularly limited, and examples thereof include aromatic acid salts and urea. These may be used alone or in combination of two or more.
Examples of aromatic acid salts include sodium xylene sulfonate, sodium toluene sulfonate, sodium cumene sulfonate, and sodium benzoate.
When a solubilizer is included, the amount is preferably 0.1 to 10.0% by weight.

The liquid detergent composition of the present invention may contain a fragrance, a dye, a preservative, a metal corrosion inhibitor, an antifoaming agent, a polymer compound, or a cloud point improver as an optional component. Good.

Next, an example of the manufacturing method of the liquid cleaning composition of this invention is demonstrated.
The liquid detergent composition of the present invention is selected from the group consisting of (A) a fatty acid N-methylalkanolamide, (B) an anionic surfactant, and (C) an amphoteric surfactant and a nonionic surfactant. It can be produced by adding at least one kind and auxiliary components such as component (D), component (E), and water as necessary, and stirring with a mixer.

The liquid detergent composition of the present invention is preferably used by preparing a diluted liquid detergent by diluting 2 to 4 times with water.
The preferred concentration of each component in the diluted liquid detergent is
(A) Fatty acid N-methylalkanolamide 1 to 3% by weight,
(B) 5-20% by weight of an anionic surfactant,
(C) A total of 1 to 3% by weight of an amphoteric surfactant and a nonionic surfactant,
(F) 73-93% by weight of water
A concentrated liquid detergent composition prepared to have the above concentration by diluting with water is a preferred composition as the liquid detergent composition of the present invention.
Moreover, when (D) component and (E) component are included in the diluted liquid cleaning agent, it is desirable that the concentration of (D) component is 0.5% by weight or more, and the concentration of (E) component is 0.5%. It is desirable that the amount is not less than% by weight.

Next, an example of a cleaning method using the liquid cleaning composition of the present invention will be described.
A method for cleaning an object to be cleaned using the liquid cleaning composition of the present invention includes:
The liquid cleaning composition is diluted with water at a predetermined magnification to obtain a diluted liquid cleaning agent, and the object to be cleaned is cleaned using the diluted liquid cleaning agent.

The object to be cleaned is not particularly limited, and examples thereof include kitchen tools such as tableware and cooking utensils, kitchen tools, vegetables, fruits and the like.
Also, the cleaning method is not particularly limited, and a method such as hand washing, pickling and so on may be determined according to the object to be cleaned.

Examples that more specifically describe the present invention are shown below. In addition, this invention is not limited only to these Examples.

(Examples 1-8)
In the formulation shown in Table 1, components (A) to (E), a solubilizer, a chelating agent, and water were mixed to prepare a liquid detergent composition.
When 1000 g of the liquid detergent composition was stored in a transparent plastic film pouch, the liquid in the pouch showed a transparent and uniform appearance.
In Table 1, as the blending amount of each component, a blending amount display as a solution containing each component and a pure component display of each component are shown together.
Further, in the notations of (B) and (C) in Table 1, (C 1) represents the number of carbon atoms, for example, (C 12) represents 12 carbon atoms.

(Comparative Examples 1-6)
In the formulation shown in Table 2, components (A) to (E), a solubilizer, a chelating agent, and water were mixed to prepare a liquid detergent composition.

(Comparative Examples 7 to 11)
A commercially available liquid detergent composition was prepared.
The liquid detergent composition of Comparative Example 7 is a composition containing linear alkylbenzene sulfonate (LAS) and not containing component (A).
The liquid detergent composition of Comparative Example 8 is a composition containing the component (B) and the component (C) and not containing the LAS and the component (A).
The liquid detergent composition of Comparative Example 9 is a composition containing the component (B) and the component (C) and not containing the LAS and the component (A).
The liquid detergent composition of Comparative Example 10 is a composition containing the component (B) and the component (C) and not containing the LAS and the component (A).
The liquid detergent composition of Comparative Example 11 is a composition containing fatty acid diethanolamide (DEA) represented by the general formula (2) and not containing the component (A).

(PH measurement)
The pH of each liquid detergent composition (stock solution, 25 ° C.) was measured using a pH meter (H-21, D-21 type). The results are shown in Tables 1 to 3.

(Viscosity measurement)
Viscosity was measured for each of the stock solution of the liquid detergent composition and each of the 2-fold diluted solution, 3-fold diluted solution, and 4-fold diluted solution obtained by diluting the undiluted solution with water 2 times, 3 times, and 4 times, respectively. The viscosity was measured by applying a rotation of 20 rpm at 20 ° C. using an E-type viscometer (Toki Sangyo Co., Ltd., VISCOMETER TV-22). The results are shown in Tables 1 to 3.
As a result, it can be seen that the cleaning compositions according to Examples 1 to 8 have an appropriate viscosity before and after dilution, unlike commercial products (Comparative Examples 7 to 10) that do not contain the component (A).
Moreover, it turns out that the viscosity before and behind dilution does not become a moderate viscosity when the density | concentration range of (B) component and (C) component is outside the range prescribed | regulated by this invention (Comparative Examples 1-6).
Since Comparative Example 11 contains fatty acid diethanolamide (DEA), it has an appropriate viscosity before and after dilution, but there is a problem from the possibility of carcinogenic substance generation.

(Foamability test)
For the foamability test, each liquid detergent composition (dilution obtained by diluting the detergent composition with water to adjust the detergent composition concentration to 0.38 g / l) using the Ross Miles method (based on JIS K3362). (Liquid) was evaluated by evaluating the foaming property after 0 minutes and after 5 minutes. The results are shown in Tables 1 to 3.
It can be said that the lower the foam height, the less foaming occurs. In addition, it can be said that the lower the foam height after 5 minutes, the sooner the foam breaks and the shorter the foam retention.

(Dilution and washing)
All of the liquid detergent composition (1000 g) was put in a dilution container, and 3000 g of water was added and stirred to obtain a diluted liquid detergent. The dilution factor was 4 times.
The detergency test was performed according to the following procedure.
First, as a soil to be cleaned, a soil mixed with soybean white squeezed oil: beef tallow = 1: 1 was prepared, and 2 ml of the soil was spread on a test dish and allowed to stand overnight at room temperature.
3 l of a cleaning solution containing 1 g of the diluted liquid detergent was prepared, the temperature of the cleaning solution was set to 30 ° C., the test dish was sufficiently warmed, and then the dirt was wiped off with a sponge containing the cleaning solution.
And the stain | pollution | contamination adhering to sponge was blotted in the washing | cleaning liquid.
This operation was repeated, and the detergency was evaluated by counting the number of dishes until the dirt adhering to the test dish could not be wiped off with a sponge. The results are shown in Tables 1 to 3.
The number of dishwashing in the cleaning power test of each example was 2-4.

(Low temperature stability (cloud point) test)
The liquid detergent composition (stock solution) was placed in a test tube, gradually cooled, and the temperature at which clouding started was taken as the cloud point. It can be said that the lower the cloud point, the better the low-temperature stability. The results are shown in Tables 1 to 3.

Claims (4)

A concentrated liquid detergent composition that is diluted during cleaning and used.
(A) 1-30% by weight of fatty acid N-methylalkanolamide,
(B) 10-60% by weight of an anionic surfactant;
(C) containing at least one selected from the group consisting of amphoteric surfactants and nonionic surfactants as an essential component in total of 1 to 20% by weight, and
A liquid detergent composition comprising no fatty acid monoethanolamide represented by the following general formula (1), fatty acid diethanolamide represented by the following general formula (2), and linear alkylbenzene sulfonate .

In the formula, R ¹ —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group.

In the formula, R ² —CO— represents a saturated or unsaturated acyl group which may have a hydroxyl group. The liquid detergent composition according to claim 1, wherein the pH is 7.0 or more. The (B) anionic surfactant is an alkane sulfonate, an α-olefin sulfonate, an alkyl sulfate, an alkyl sulfosuccinate, a polyoxyalkylene alkyl ether sulfate, a polyoxyalkylene alkenyl ether sulfate, The liquid detergent composition according to claim 1 or 2, which is at least one selected from the group consisting of a polyoxyalkylene alkyl ether carboxylic acid ester salt and a polyoxyalkylene alkenyl ether carboxylic acid ester salt. The (B) anionic surfactant is an alkane sulfonate, an α-olefin sulfonate, an alkyl sulfate, an alkyl sulfosuccinate, a polyoxyalkylene alkyl ether sulfate, a polyoxyalkylene alkenyl ether sulfate, At least one selected from the group consisting of a polyoxyalkylene alkyl ether carboxylic acid ester salt and a polyoxyalkylene alkenyl ether carboxylic acid ester salt,
The liquid detergent composition according to claim 1 or 2, wherein the total content of polyoxyalkylene alkyl ether sulfate and polyoxyalkylene alkenyl ether sulfate is less than 15% by weight.