JPH1180784A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid detergent composition for hard surfaces such as the surfaces of kitchenware, a compact type liquid detergent composition useful as a detergent composition for bodies and hair, and a liquid detergent composition mild in skin irritativeness and excellent in washability and storage color stability. SOLUTION: This liquid detergent composition containing surfactants in an amount of 30-50 wt.% contains (a) a surfactant containing one or more nitrogen atoms in the molecule and (b) a surfactant containing one or more sulfur atoms in the molecule in amounts of >=15 wt.% and 1-20 wt.%, respectively, based on the total amount of the surfactants, and further contains (c) one or more kinds of compounds selected from hydroxycarboxylic acids such as malic acid, tartaric acid, citric acid and gluconic acid or their salts and dicarboxylic acids such as oxalic acid and succinic acid or their salts in an amount of 0.1-50 wt.% based on the amount of the surfactant of the component (a).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact type liquid cleaning composition which is extremely useful as a cleaning agent for kitchens and other hard surfaces, and a body or hair cleaning agent. Has a very mild and high mildness, and also has excellent detergent power,
In addition, the present invention relates to a liquid detergent composition having excellent stability against discoloration during storage.

[0002]

2. Description of the Related Art In recent years, compact type liquid cleaners for kitchens and the like and liquid cleaners for the body or hair have become mainstream, giving great advantages to consumers and distributors. I have.

[0003] Surfactants incorporated in conventional compact type liquid detergent compositions have been developed mainly with anionic surfactants typified by alkyl ethoxy sulfate because of their excellent detergency. Many things have been done. In general, it has been known that when a liquid detergent composition mainly composed of an anionic surfactant is used as a kitchen detergent, there is a problem in that roughening occurs due to adsorption based on electric charge.

In order to solve this problem, the use of nonionic surfactants typified by alcohol ethoxylates has been studied. However, although such nonionic surfactants alone can satisfy mild properties, they have been used for cleaning. The power was not enough.

[0005] Therefore, the interaction between a surfactant containing a nitrogen atom in the molecule, such as an amine oxide, betaine, alkanolamide, or amino acid-based surfactant, and another surfactant causes mildness and detergency. Use of surfactants capable of realizing improvement of the surface property has been promoted.

However, a surfactant having a nitrogen atom in a molecule has a problem that when stored in an aqueous solution, the surfactant undergoes an oxidation reaction due to active oxygen contained in the water and is colored. Therefore, although it is known that the performance as a cleaning agent is excellent, there is a problem that a surfactant containing a nitrogen atom in a molecule cannot be blended in a large amount at present. In recent years, there has been a strong demand for the development of a liquid detergent composition which is mild in stimulus, has high mildness, has excellent detergency, and has good stability against discoloration during storage.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a liquid detergent composition which has mild mild irritation to the skin, has excellent detergency, and has excellent stability against discoloration during storage. The purpose is to do.

[0008]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a surfactant of 30 to
In a liquid detergent composition containing 50% by weight, a specific amount of a surfactant containing at least one nitrogen atom in a molecule is contained, and discoloration during storage when the surfactant is contained is contained. The present inventors have found that a liquid detergent composition of the above-mentioned purpose can be obtained by including a specific amount of a specific component capable of solving the above-mentioned problem and a specific surfactant, thereby completing the present invention. That is, the liquid detergent composition of the present invention contains 30 to 30 surfactants.
A liquid detergent composition containing 50% by weight, wherein the liquid detergent composition contains (a) at least one nitrogen atom in the molecule based on the total amount of the surfactant contained. At least 15% by weight or more of a surfactant,
(b) 1 to 20% by weight of a surfactant containing at least one sulfur atom in the molecule, and (c) a hydroxycarboxylic acid selected from malic acid, tartaric acid, citric acid and gluconic acid or a hydroxycarboxylic acid thereof. A salt, or a dicarboxylic acid selected from oxalic acid and succinic acid, or at least one compound selected from a salt thereof is contained in an amount of 0.1 to 50% by weight based on the amount of the surfactant (a). It is characterized by the following.

[0009]

Embodiments of the present invention will be described below in more detail. Surfactant containing at least one nitrogen atom in the molecule used in the present invention (component (a))
Is not limited as long as it has at least one nitrogen atom in the molecule, and examples thereof include alkanolamides represented by the following general formula (I). Can be This alkanolamide is a nonionic surfactant having one nitrogen atom in the molecule.

Embedded image [R ₁ in the formula (I) represents a linear or branched alkyl group or alkenyl group of 7 to 21 carbon atoms, R ₂
And R ₃ may be the same or different, and represent a hydrogen atom, a hydroxyalkyl group having 1 to 3 carbon atoms or-(C
₂ H ₄ O) mH group (wherein, m represents a represents) an integer of 2-4. ]

Specific preferred examples of the above formula (I) include monoethanolamide decanoate, diethanolamide decanoate, monoethanolamide laurate, diethanolamide laurate, monoisopropanolamide laurate, and monoethanolamide myristate. , Myristic acid diethanolamide, oleic acid monoethanolamide, oleic acid diethanolamide, coconut fatty acid monoethanolamide, coconut fatty acid diethanolamide, coconut fatty acid monoisopropanolamide, and the like, but are not limited thereto.

Further, as the above-mentioned component (a) of the present invention, an alkylmethylglucamide represented by the following general formula (II) can also be suitably used. This alkylmethylglucamide is also a nonionic surfactant having one nitrogen atom in the molecule.

Embedded image [R ₄ in the above formula (II) represents a linear or branched alkyl group or alkenyl group having 7 to 21 carbon atoms, and R ₅ represents
X represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and X represents a reductive aminated reduced sugar residue having at least two or more free hydroxyl groups or an alkoxylated derivative thereof. )

Specific preferred examples of the above formula (II) include decylmethylglucamide, dodecylmethylglucamide, myristylmethylglucamide, and coconut fatty acid methylglucamide, but are not limited thereto. Absent.

Further, as the component (a) of the present invention, betaine represented by the following general formula (III) can also be suitably used. This betaine is an amphoteric surfactant with one or two nitrogen atoms in the molecule.

Embedded image [R ₆ in the above formula (III) represents a linear or branched alkyl group or alkenyl group having 7 to 21 carbon atoms, and n and q may be the same or different, and 1 And p is 0 or 1. )

Further, as the above-mentioned component (a) of the present invention, an amine oxide represented by the following general formula (IV) can also be suitably used. The amine oxide is an amphoteric (zwitter) surfactant having one or two nitrogen atoms in the molecule.

Embedded image [R ₇ in the formula (IV) represents a linear or branched alkyl group or alkenyl group having _{7 to} 21 carbon atoms, and R ₈ and R
₉ may be the same or different and have 1 to 1 carbon atoms.
4 represents a substituted or unsubstituted alkyl group, n is an integer of 1 to 4, and p is 0 or 1. )

The component (a) of the present invention includes alkyl alaninate, alkyl taurate, alkyl sarcosinate and alkyl glycine, alkyl alanine, alkyl amidopropyl amino acid represented by the following general formula (V). And the like can also be suitably used.

Embedded image [R ₁₀ in the above formula (V) represents a linear or branched alkyl group or alkenyl group having 7 to 21 carbon atoms, and R ₁₁ represents a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms. Represents an alkyl group, n and q may be the same or different, is an integer of 1 to 4, p is 0 or 1, and M is
A hydrogen atom, an alkali metal ion such as sodium or potassium, an alkaline earth metal ion equivalent to monovalent such as magnesium or calcium, or a substituted or unsubstituted ammonium cation. )

Further, as the above-mentioned component (a) of the present invention, a cationic surfactant represented by imidazoline or a derivative thereof, alkylamine, ammonium or the like can be preferably used.

In the present invention, the surfactant (component (a)) having at least one nitrogen atom in each of the above-mentioned various molecules can be suitably used alone or as a mixture. In order to express the high performance of the agent, at least 15% by weight or more of the total amount of the surfactant contained in the liquid detergent, preferably
It is desirable that it constitutes at least 40% by weight, more preferably at least 60% by weight. The amount of the component (a) of the present invention is 15% of the total amount of the surfactant contained in the liquid detergent.
If the amount does not exceed the weight%, the desired effect becomes insufficient, and a good cleaning effect and mildness cannot be realized.

The surfactant (component (b)) containing at least one sulfur atom in the molecule used in the present invention may be any surfactant containing at least one sulfur atom in the molecule. The ionicity, structure, production method and the like are not limited, but for example, alkyl benzene sulfonic acid salt, polyoxyethylene alkyl ether sulfate, alkyl sulfate ester salt, α-olefin sulfonate, alkyl sulfonate, α-sulfo fatty acid Salt, sulfosuccinate,
N-fatty acid ester taurine salts may be mentioned. Specifically, linear alkyl (C _10-18 ) benzenesulfonate Na
Salt, lauryl ethoxy (3) sulfate Na salt, alkyl (C _12-18 ) sulfate Na salt, C ₁₄ α-olefin sulfonic acid sodium salt, α-sulfourauric acid methyl ester N
a salt can be used. In the present invention, the surfactants having at least one or more sulfur atoms in the various molecules (component (b)) can be suitably used alone or as a mixture, but these surfactants have In order to exhibit high performance, at least 1 to 20% by weight, preferably 4 to 16% by weight, and more preferably 7 to 12% by weight, based on at least the total amount of the surfactant contained in the liquid detergent. It is desirable that When the amount of the component (b) of the present invention is less than 1% by weight based on the total amount of the surfactant contained in the liquid detergent, the detergency becomes insufficient. Is unfavorable because the irritation to the skin becomes high and the mildness is impaired.

The hydroxycarboxylic acid selected from malic acid, tartaric acid, citric acid and gluconic acid or a salt thereof, or at least one compound selected from oxalic acid and succinic acid or a dicarboxylic acid selected from succinic acid used in the present invention. The component (c) has an effect of preventing discoloration during storage when used together with the components (a) and (b).

The amount of component (c) used in the present invention is as described above.
(a) 0.1 to 50% by weight based on the surfactant of the component,
Preferably, it is 0.5 to 15% by weight. When the amount of this component (c) is also less than 0.1% by weight,
The effect of preventing discoloration is insufficient, and discoloration occurs when stored for a long time or under high temperature conditions. On the other hand, if it exceeds 50% by weight, no further effect can be obtained, but the cost is increased, and adverse effects such as a decrease in detergency may occur.

In addition, the detergent composition of the present invention may further contain a surfactant and other additives other than the above-mentioned components (a) and (b), which impair the effects of the present invention. Any combination may be used within a range that does not exist. Specifically, a nonionic surfactant containing no nitrogen atom in the molecule can be used as long as the effect of the present invention is not impaired.

In the present invention, the nonionic surfactant containing no nitrogen atom in the molecule is not particularly limited by its structure and the like. For example, polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, A nonionic surfactant having a cyclic or acyclic polyol having two or more free hydroxyl groups in a molecule as a hydrophilic group is exemplified.

It is preferable that the polyoxyethylene alkyl ether has an alkyl hydrophobic group having 8 to 18 carbon atoms and a hydrophilic oxyethylene group having an average degree of polymerization of 1 to 50. More preferably, the number of carbon atoms in the hydrophobic group is preferably 10 to 14, and the average degree of polymerization of the hydrophilic group is preferably 12 or more. Specifically, polyoxyethylene (12) lauryl ether, polyoxyethylene (12) decyl ether, polyoxyethylene (15) lauryl ether, polyoxyethylene (15) myristyl ether, polyoxyethylene (20) lauryl ether, Polyoxyethylene (20) myristyl ether, polyoxyethylene (3
0) Lauryl ether and the like, and these can be used alone or in combination. The blending of these high EO addition type alcohol ethoxylates particularly contributes to mildness. However, since this high EO addition type alcohol ethoxylate has low detergency, it is not preferable that the mixing amount is too large. It is desirable that this amount is not more than 50% by weight based on the nonionic surfactant used. Also, polyoxyethylene alkyl ester,
It can be used in the same manner as the above polyoxyethylene alkyl ether.

Nonionic surfactants having a cyclic or acyclic polyol having two or more free hydroxyl groups in the molecule as a hydrophilic group include, for example, alkyl polyglucoside, methyl glucoside fatty acid ester, and ethyl glucoside fatty acid ester. Sucrose fatty acid esters, alkyl mannosides, alkyl fructosides, methylglucamine fatty acid amides, alkyl polyglycerides, and the like, but are not limited thereto.

Further, an anionic surfactant can be preferably added to the liquid detergent composition of the present invention as long as the effect of the present invention is not impaired. The anionic surfactant that can be used is not particularly limited depending on the type and structure thereof, but specifically, polyoxyethylene alkyl ether sulfate, α-olefin sulfonate, α-sulfo fatty acid salt, alkylbenzene sulfonic acid Salt, fatty acid soap,
Examples include, but are not limited to, sulfosuccinates and alkyl ether carboxylates.

These surfactants may be used alone or as appropriate.
It can be blended in combination of more than one kind. In the present invention, the above-mentioned various surfactants and the above-mentioned component (a), (b)
The total weight of the components is 30 to 50 relative to the total amount of the detergent composition.
It must be contained in the range of% by weight, so that the intended compact type liquid detergent composition is provided. If the total weight is more than 50% by weight, skin irritation increases, which is not preferable. Also,
If the amount is less than 30% by weight, the detergency as a compact type liquid detergent is reduced, which is not preferable.

Furthermore, the liquid detergent composition of the present invention includes alcoholic hydrotropes represented by lower alcohols, polyalkylene glycols, water-soluble polyols, etc .; benzoic acid, toluenesulfonic acid, xylenesulfonic acid, Aromatic hydrotropes represented by cumenesulfonic acid and the like can also be suitably used alone or in combination.

The solvent of the detergent composition of the present invention is not particularly limited, but is preferably water (purified water).
Can be used. Further, as other preferably compoundable additive components, for example, builders such as inorganic salts,
Commonly used substances such as viscosity modifiers, colorants, antioxidants, preservatives, bactericides, anti-inflammatory agents, medicinal ingredients and fragrances may be added.

[0029]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. Note that the present invention is not limited to these examples.

(Examples 1 to 7, Comparative Examples 1 to 15) Liquid detergent compositions were prepared according to the formulations shown in Table 1 below, and the skin irritation (sensory evaluation), detergency, The color stability during storage was evaluated. The results are shown in Table 1 below. In addition, the compounding quantity in a table | surface is "weight%", and pH adjusted the composition to 6.5.

(Evaluation of skin irritation) Surfactant composition 1
% Aqueous solution (35 ° C.) was evaluated by an immersion test by hand of 10 testers. That is, the immersion-drying operation was performed 15 times every minute, and the degree of skin roughness of the hand after 24 hours was visually judged according to the following evaluation criteria. Evaluation Criteria: ○: Almost no skin roughness △: Signs of rough skin such as dry desquamation and red spot change are observed on part of the keratinous surface of the skin ×: Hand rough symptoms such as dry desquamation and red spot change Clearly acknowledged

(Evaluation of detergency) 1 g of beef tallow is 10 cm × 1
The solution was evenly applied to a 5 cm tapper container to obtain a severely soiled hydrophobic surface stain. 11.5cm × 7.5cm
Take 36 g of water and 4 g of various cleaning compositions of Table 1 in a × 3 cm dishwashing sponge, rub them by hand several times, and remove the contaminated tapper container at 25 ° C. in the same manner as usual at home. And washed. After the washing, the well was rinsed with water, and the contaminated surface of the tapper container at that time was evaluated by the touch when touched by hand according to the following evaluation criteria. Evaluation criteria: ：: Touching any part of the tapper container gives a squeaky and frictional feeling, and no sliminess due to residual oil is felt. Δ: There is a feeling of friction when touching the smooth surface of the tapper container, and no oil remains, but lubricity remains at edges and corners. ×: The entire tapper container is felt slimy, and it is apparent that oil remains.

(Color tone stability during storage)
l Filled into glass bottles, stored in a 50 ° C constant temperature bath for one month,
The change in color tone before and after storage was measured with a spectrophotometer (10 mm cell, wavelength 420 nm), and the degree of the change was evaluated based on the following evaluation criteria. Evaluation criteria: ○: 0 to less than 0.2 ×: 0.2 or more

[0034]

[Table 1]

(Consideration of Table 1) Example 1 within the scope of the present invention
Nos. 7 to 7 were found to be less irritating to the skin and more excellent in detergency and color tone stability during storage as compared with Comparative Examples 1 to 15, which were outside the scope of the present invention. Specifically, in Examples 1 to 7, the components (a), (b), and (c) have the content of the components, and the components (a) to (c) have the respective compounding amounts. Is within the scope of the present invention, for the first time, there is no skin irritation, and further, the washing power and the color stability during storage are excellent. On the other hand, in Comparative Examples 1 to 15,
If any one or more of the components (a), (b) and (c) is out of the scope of the present invention, the skin irritation, detergency and color tone during storage are reduced. It turned out that not all the stability could be satisfied.

[0036]

According to the present invention, there is provided a detergent composition which has mild mild irritation to the skin, high detergency, and excellent color stability during storage.
In particular, there is provided a liquid detergent composition suitable as a hard surface detergent such as a kitchen detergent, a body detergent, and a hair detergent.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C11D 1/52 C11D 1/52 1/835 1/835 1/94 1/94 3/20 3/20 // A61K 7/075 A61K 7/075 (72) Inventor Masao Nishida 1-7-3 Honjo, Sumida-ku, Tokyo Inside Lion Corporation

Claims (1)

[Claims] 1. A liquid detergent composition containing a surfactant in an amount of 30 to 50% by weight, wherein the liquid detergent composition contains (a) based on the total amount of the surfactant contained therein. A) at least 15% by weight or more of a surfactant containing at least one nitrogen atom in the molecule, and (b) 1 to 20% by weight of a surfactant containing at least one sulfur atom in the molecule; Further, (c) malic acid, tartaric acid, citric acid, hydroxycarboxylic acid selected from gluconic acid or a salt thereof, or oxalic acid, at least one compound selected from dicarboxylic acid selected from succinic acid or a salt thereof, A liquid detergent composition comprising 0.1 to 50% by weight based on the amount of the surfactant (a).