JP2011084644A - Liquid detergent composition for kitchen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid detergent composition for a kitchen having good oil stain detergency, ameliorating hand chapping to exhibit excellent hand skin mildness, moisturizing hand skin after cleaning to reduce dryness of the hand skin, and stably securing its transparent appearance. <P>SOLUTION: The liquid detergent composition for a kitchen includes an anionic surfactant (a), a semipolar surfactant (b), a nonionic surfactant (c), a hydroxy acid or its salt (d), and at least one of hydrotrope agent (e) selected from the group consisting of toluene sulfonic acid, toluenesulfonate, cumene sulfonic acid, cumenesulfonate, benzoic acid, benzoate and ethanol. A mass ratio (a)/(b) of the component (a) to the component (b) is 1.5-3; a mass ratio [(a)+(b)]/(c) of a total amount of the components (a) and (b) to the component (c) is 1-4; and a mass ratio (d)/(c) of the component (d) to the component (c) is 0.2-1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a liquid detergent composition for use in hand-washing dishes such as tableware and cooking utensils with a sponge in a kitchen.

In the liquid detergent composition for kitchens, a high detergency is demanded against oil stains adhering to an object to be washed such as tableware or cooking utensils made of glass or ceramics.
In order to improve the detergency against oil stains, components that exhibit a cleaning effect such as anionic surfactants, nonionic surfactants, and amphoteric surfactants have conventionally been appropriately combined with liquid detergent compositions for kitchens. Is blended.

When washing objects to be washed by hand with a sponge coated with a liquid detergent composition, the detergent composition comes into direct contact with the hand, resulting in rough hands, or the detergent composition remains on the skin after washing. And it feels bad.
Therefore, in the cleaning composition for kitchens, the cleaning power against oil stains is improved, hand roughness is reduced (good hand skin mildness), and the feel of the hand skin after washing is the same as before washing. It has been desired to develop a technology that can satisfy any of the above-mentioned conditions.

For example, in order to reduce stickiness after washing, neutral liquid detergent compositions each containing a predetermined amount of an alkyl glycoside, a specific HLB nonionic surfactant, and a specific water-soluble salt have been proposed. (See Patent Document 1).
Moreover, in order to reduce the stickiness (residual feeling) of the fingers after washing, a detergent containing a predetermined amount of alkyl glycoside, α-hydroxy acid, and amphoteric surfactant has been proposed (Patent Literature). 2).
In addition, to reduce hand roughness after washing, and to give a refreshing and smooth hand feel, anionic surfactants, semipolar surfactants, nonionic surfactants, and specific surfactant aqueous solutions There has been proposed a kitchen hand-washing liquid detergent composition containing an organic compound in which the elastic modulus of the stratum corneum soaked is 1.2 or more (see Patent Document 3).

JP-A-3-50299 JP 2000-169880 A JP 2006-182905 A

  However, the cleaning agents described in Patent Documents 1 and 2 do not have the effect of imparting touch to the skin after washing, although the cleaning composition is difficult to remain on the fingers after washing. Therefore, the feel of the hand skin after washing cannot be kept to the same level as before washing.

By the way, dishwashing and the like are often repeated every day, but by washing this dishwashing and the like, when the hands and skin are rubbed together after washing (hereinafter referred to as “dryness of hand skin”). Some people come to feel).
Therefore, not only the high cleaning power but also the reduction of rough hands (improving the mildness of hand skin), and the moisturizing moisturized hand skin after cleaning. Therefore, it is necessary to develop a technique that can satisfy both of the dryness of the hand skin.
The cleaning agent described in Patent Literature 3 increases the elastic modulus of the stratum corneum and imparts a “smooth feel” to the hand skin, and imparts a feeling opposite to “moist moisturizing”. is there. Moreover, the cleaning agent described in Patent Document 3 has a high mass ratio of 4 or more to the anionic surfactant and the semipolar surfactant. Therefore, due to the effect of free anionic surfactant in the composition, the mildness of hand skin is not sufficient, and moreover, it tends to cause white turbidity especially when stored at low temperatures over time, and it is difficult to ensure a stable transparent appearance. It is.

  The present invention has been made in view of the above circumstances, has a good detergency against oil stains, has reduced hand roughness, has excellent hand skin mildness, and moisturizes the hand skin after washing. It is an object of the present invention to provide a liquid detergent composition for kitchen that can be imparted to reduce the dryness of the hand skin and can stably ensure a transparent appearance.

As a result of intensive studies, the present inventors provide the following means in order to solve the above problems.
That is, the liquid detergent composition for kitchen of the present invention comprises an anionic surfactant (a), a semipolar surfactant (b), a nonionic surfactant (c), a hydroxy acid or a salt thereof (d). And at least one hydrotrope agent (e) selected from the group consisting of toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid, benzoic acid salt and ethanol, ) / (B) is a mass ratio of 1.5-3, [(a) + (b)] / (c) is a mass ratio of 1-4, and (d ) / (C), wherein the mass ratio is 0.2 to 1.
In the kitchen liquid detergent composition of the present invention, the component (d) is preferably lactic acid or a salt thereof.

  According to the present invention, the detergency against oil stains is good, the rough hand is reduced, the hand skin is mild, and the moisturized moisture is given to the hand skin after washing, so that the dryness of the hand skin is given. It is possible to provide a liquid detergent composition for kitchens that can be reduced and can further ensure a stable transparent appearance.

≪Liquid detergent composition for kitchen≫
The liquid detergent composition for kitchen of the present invention comprises an anionic surfactant (a), a semipolar surfactant (b), a nonionic surfactant (c), a hydroxy acid or a salt thereof (d), Contains a specific hydrotrope (e).

<(A) component>
In the present invention, the component (a) is an anionic surfactant.
When it divides roughly as a suitable thing in (a) component, a sulfonate type, a sulfate ester type, a carboxylate type, and a phosphate ester type are mentioned.
Examples of the sulfonate type include alkylbenzene sulfonate, alkyl sulfate, alkane sulfonate, α-olefin sulfonate, α-sulfo fatty acid salt, α-sulfo fatty acid alkyl ester salt, sulfosuccinate and the like. Among these, alkane sulfonates are preferable and secondary alkane sulfonates are more preferable because of their good detergency against oil stains and storage stability of the liquid detergent composition (to ensure a transparent appearance).
Examples of the sulfate ester type include alkyl sulfate ester salts, alkenyl sulfate ester salts, polyoxyalkylene alkyl ether sulfate ester salts, polyoxyalkylene alkenyl ether sulfate ester salts, and the like. Of these, polyoxyalkylene alkyl ether sulfates (AES) are preferred because of their good detergency against oil stains and storage stability of the detergent composition (to ensure a transparent appearance). ) Is more preferable.
Examples of the carboxylate type include alkyl ether carboxylates, amide ether carboxylates, sulfosuccinates, amino acid anionic surfactants, and the like.

  Among the above, as the component (a), since the detergency against oil stains is good, sulfonate type and sulfate ester type are more preferable, alkylbenzene sulfonate, alkyl sulfate, alkane sulfonate. , Α-olefin sulfonates; polyoxyalkylene alkyl ether sulfates are more preferred. Particularly preferred is a combination of AES, AES and a secondary alkane sulfonate, since the cleaning power against oil stains and the storage stability of the cleaning composition (ensuring a transparent appearance) are good, most preferably This is a combination of polyoxyethylene alkyl ether sulfate (NRES), NRES and secondary alkane sulfonate having a narrow rate of 40% by mass or more, which will be described later.

  (A) The salt form of the component includes alkali metal salts such as sodium and potassium; alkaline earth metal salts such as calcium and magnesium; alkanolamine salts such as monoethanolamine, diethanolamine and triethanolamine; ammonium salts And these may be mixed. Of these, alkali metal salts are preferable, and sodium salts are more preferable.

(About NRES)
In the present invention, when NRES is used as the component (a), the cleaning power against oil stains is mainly good. Moreover, the storage stability of the cleaning composition is improved, and a transparent appearance can be secured stably. Excellent storage stability especially at low temperature. Furthermore, the mildness of the hand skin is also improved.

  In the present specification, the “narrow ratio” means that represented by the following formula (S) indicating the distribution ratio of alkylene oxide adducts having different numbers of added moles of alkylene oxide.

［式中、ｎ_ｍａｘは全体のアルキレンオキシド付加体中に最も多く存在するアルキレンオキシド付加体のアルキレンオキシドの付加モル数を示す。ｉはアルキレンオキシドの付加モル数を示す。Ｙｉは全体のアルキレンオキシド付加体中に存在するアルキレンオキシドの付加モル数がｉであるアルキレンオキシド付加体の割合（質量％）を示す。］

[ _Wherein n _max represents the number of moles of alkylene oxide added in the alkylene oxide adduct most abundant in the entire alkylene oxide adduct. i represents the number of added moles of alkylene oxide. Yi represents the proportion (% by mass) of the alkylene oxide adduct having an added mole number of alkylene oxide present in the entire alkylene oxide adduct. ]

In NRES, the narrow ratio is preferably 40% by mass or more, more preferably 55% by mass or more, since the detergency against oil stains is further improved and the sustainability of foam is also improved. And more preferably 65% by mass or more. The upper limit of the narrow ratio is preferably as high as possible, and is substantially 90% by mass or less from the viewpoint of manufacturability.
In the above formula (S), when n _max is zero (mole), the narrow rate is the total ratio (mass%) of Y ₀ , Y ₁ and Y ₂ ; when n _max is 1 (mole) The narrow ratio is the total ratio (mass%) of Y ₀ , Y ₁ , Y ₂ and Y ₃ .

The narrow rate can be controlled by, for example, the NRES manufacturing method.
As a method for producing NRES, for example, a polyoxyethylene alkyl ether (alcohol having a desired molecular weight range, that is, a desired number of moles of added ethylene oxide, is obtained by distillation or the like from a reaction product obtained by synthesizing a higher alcohol and ethylene oxide by a conventional method. The ethoxylate is fractionated and then subjected to sulfation reaction and neutralization.
Further, by the method described in Japanese Patent No. 3312883, that is, a method using a specific catalyst, a polyoxyethylene alkyl ether having a narrow distribution of ethylene oxide addition mole number of 55% by mass or more can be obtained. Therefore, it can also be obtained by subjecting the polyoxyethylene alkyl ether to a sulfation reaction and neutralization. The specific catalyst includes a surface-modified composite metal oxide catalyst, specifically, metal ions (Al ³⁺ , Ga ³⁺ , In ³⁺ , Tl ³⁺ , Co ³⁺ , Sc ³⁺ , La ³⁺ , Mn ^2+, etc.) and a mixed metal oxide catalyst such as magnesium oxide, and surface-modified hydro with metal hydroxide and / or metal alkoxide It is a fired product catalyst of talcite.

  Preferable examples of NRES include polyoxyethylene alkyl ether sulfate salts represented by the following general formula (a-1).

［式中、Ｒ^６は炭素数８〜１８のアルキル基又はアルケニル基であり；ｎはエチレンオキシドの平均付加モル数を示し、１〜６である。Ｍはアルカリ金属原子、アルカリ土類金属原子、アルカノールアミン又はアンモニウムを表す。］

[Wherein, R ⁶ represents an alkyl group or an alkenyl group having 8 to 18 carbon atoms; n represents an average number of added moles of ethylene oxide, and is 1 to 6. M represents an alkali metal atom, an alkaline earth metal atom, an alkanolamine or ammonium. ]

In said formula (a-1), R < ⁶ > is a C8-C18 alkyl group or a C8-C18 alkenyl group, and a C8-C18 alkyl group is preferable. The alkyl group or the alkenyl group may be linear or branched.
In R ⁶ , the carbon number is 8 to 18, preferably 10 to 16, and more preferably 12 to 13. When R ⁶ has 8 or more carbon atoms, the hydrophobicity increases, so that the detergency against oil stains is improved. On the other hand, when the carbon number of R ⁶ is 18 or less, the solubility of NRES itself is improved, so that precipitation during storage over time is suppressed and a transparent appearance is easily obtained.
However, R ⁶ is derived from a higher alcohol that is a raw material of NRES. Therefore, the higher alcohol is preferably selected from the following (i) to (v) which are industrially easily available.
The “branch rate” indicates the ratio (mass%) of the higher alcohol having a branched chain to the total higher alcohol. “Linear ratio” indicates the ratio (% by mass) of linear higher alcohol to the total higher alcohol.
(I) Product name “Neodol 23” manufactured by Shell Chemicals (branch rate: 20 mass%). This is produced from an n-olefin by a modified oxo method and rectified.
(Ii) A C13 alcohol obtained from a butene trimer by an oxo method (branch rate: 100% by mass).
(Iii) A higher alcohol (branch rate: 100% by mass) obtained from a medium chain alcohol by a garvet reaction.
(Iv) Product name “Safol23” (branch rate: 50 mass%) manufactured by Sasol. This is an alcohol obtained from an olefin obtained by gasification of coal by an oxo method and further hydrogenated.
(V) Product name “CO1270” (branching rate: 0% by mass) (straight chain rate: 100% by mass) manufactured by P & G. This is a natural higher alcohol synthesized from natural fats and oils.

In said formula (a-1), n shows the average addition mole number of ethylene oxide, and is 1-6. Especially, since the detergency with respect to oil dirt improves, 1-5 are preferable and 1-3 are more preferable.
Here, n represents the “average” added mole number of ethylene oxide. Accordingly, the polyoxyethylene alkyl ether sulfate ester salt represented by the formula (a-1) is an aggregate of ethylene oxide adducts having different addition mole numbers of ethylene oxide. The narrow ratio is obtained from the above formula (S) by setting the number of moles of ethylene oxide added to the most abundant ethylene oxide adduct (polyoxyethylene alkyl ether sulfate ester salt) in the aggregate as “n _max ”. It is done.

In the formula (a-1), M represents an alkali metal atom, an alkaline earth metal atom, an alkanolamine or ammonium.
Specific examples include alkali metal atoms such as sodium, potassium and lithium; alkaline earth metal atoms such as calcium and magnesium; alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; ammonium and the like. You may do it. Especially, as M, an alkali metal atom is preferable and sodium is especially preferable.

The NRES represented by the formula (a-1) can be produced, for example, as follows.
A polyoxyethylene alkyl ether (alcohol ethoxylate) is obtained by adding ethylene oxide to a higher alcohol, preferably a higher alcohol selected from the above (i) to (v). As a catalyst used when adding ethylene oxide, for example, a composite metal oxide Lewis acid sintered solid catalyst composed of Al / Mg / Mn described in Japanese Patent No. 3312883 is preferable. Thereby, the thing with a narrow addition mole number distribution of ethylene oxide is obtained.
The obtained polyoxyethylene alkyl ether can be sulfonated or sulfated with sulfone to produce a polyoxyethylene alkyl ether sulfate, and further neutralized to produce a polyoxyethylene alkyl ether sulfate.

(About secondary alkane sulfonate)
In the present invention, when the secondary alkane sulfonate is used as the component (a), the durability of the foam is excellent and the detergency against oil stains is also improved.
Secondary alkane sulfonate is a surfactant, also called “paraffin sulfonate”, and is usually provided in the form of a mixture of secondary alkyl sulfonates having 10 to 21 carbon atoms per molecule.
In the present invention, the mixture preferably contains 80% by mass or more, and more preferably 90% by mass or more of the secondary alkyl sulfonate having 13 to 18 carbon atoms per molecule. Note that this mixture may contain a small amount of a primary alkyl sulfonate, disulfonate, or polysulfonate.

  Suitable examples of the secondary alkane sulfonate include compounds represented by the following general formula (a-2).

［式中、ｐ＋ｑ＝１０〜１４であり；Ｍはアルカリ金属原子、アルカリ土類金属原子、アルカノールアミン又はアンモニウムを表す。］

[Wherein p + q = 10 to 14; M represents an alkali metal atom, an alkaline earth metal atom, an alkanolamine or ammonium. ]

In the formula (a-2), p + q = 10 to 14, that is, the component represented by the formula (a-2) has 13 to 17 carbon atoms (however, in M in the formula (a-2)) Secondary alkyl sulfonate of which the number of carbon atoms is excluded).
When p + q is 10 or more, the detergency against oil stains is improved. On the other hand, when p + q is 14 or less, the solubility of the compound itself represented by formula (a-2) is improved, so that precipitation during storage is suppressed.
In the formula (a-2), M is the same as M in the formula (a-1). Among them, an alkali metal atom is preferable, and sodium is particularly preferable.

  As a commercially available product that can be suitably used as an alkane sulfonate, HOSTAPUR SAS 30 (trade name, manufactured by Clariant Japan KK; the content of secondary alkyl sodium sulfonate having 13 to 17 carbon atoms is 90% by mass or more. ), HOSTAPUR SAS 60 (trade name, manufactured by Clariant Japan Co., Ltd .; content of secondary alkyl sulfonate of 13 to 17 carbon atoms is 90% by mass or more), MERSOL80 (trade name, manufactured by Bayer; average carbon number) 15 (content of secondary alkyl sulfonate having 13 to 17 carbon atoms is 80% by mass or more)), MARLON series (manufactured by SASOL; PS65, PS60, PS60W (above, trade name), 10 to 18 carbon atoms ( The content of sodium secondary alkyl sulfonate having 13 to 17 carbon atoms is 90 Higher amount%)) and the like.

(A) A component can be used individually by 1 type or in mixture of 2 or more types.
The content of the component (a) in the kitchen liquid detergent composition is preferably 1 to 30% by mass, more preferably 5 to 30% by mass, and further preferably 10 to 30% by mass. preferable.
When the content of the component (a) is at least the lower limit value, more preferably at least 5% by mass, the detergency against oil stains is further improved. On the other hand, when the amount is not more than the upper limit value, white turbidity is less likely to occur during storage over time particularly at low temperatures, and storage stability is further improved.

<(B) component>
In the present invention, the component (b) is a semipolar surfactant.
Suitable examples of component (b) include amine alkylene oxide surfactants and amine oxide surfactants. Of these, amine oxide surfactants are preferred because of their good detergency against oil stains and good foaming.
Examples of the amine oxide surfactant include alkylamine oxide and alkylamidopropyldimethylamine oxide, and among them, a compound represented by the following general formula (b-1) is preferable.

［式中、Ｒ^１は、炭素数８〜１８の直鎖状若しくは分岐鎖状のアルキル基又はアルケニル基であり；Ｒ^２、Ｒ^３は、それぞれ独立して炭素数１〜３のアルキル基又はヒドロキシアルキル基であり；Ｒ^４は炭素数１〜４のアルキレン基である。Ｂは−ＣＯＮＨ−、−ＮＨＣＯ−、−ＣＯＯ−、−ＯＣＯ−又は−Ｏ−であり；ｒは０又は１の数である。］

[Wherein, R ¹ is a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms; R ² and R ³ are each independently an alkyl group having 1 to 3 carbon atoms or A hydroxyalkyl group; R ⁴ is an alkylene group having 1 to ⁴ carbon atoms; B is —CONH—, —NHCO—, —COO—, —OCO— or —O—; r is a number of 0 or 1; ]

In the formula (b-1), R ¹ is a linear or branched alkyl group having 8 to 18 carbon atoms, or a linear or branched alkenyl group having 8 to 18 carbon atoms, A linear or branched alkyl group having 8 to 18 carbon atoms is preferred.
In the alkyl group and alkenyl group of R ^1, the number of carbon atoms is 8 to 18, and the detergency against oil stains is further improved, so that it is preferably 10 to 14.
R ² and R ³ are each independently an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms, and more preferably a methyl group. More preferably, R ² and R ³ are all methyl groups.
R ⁴ is an alkylene group having 1 to 4 carbon atoms.
B is —CONH—, —NHCO—, —COO—, —OCO— or —O—.
r is a number of 0 or 1, and 0 is preferable.

  Specific examples of the amine oxide type surfactant include alkyl dimethyl amine oxides such as lauryl dimethyl amine oxide, coconut alkyl dimethyl amine oxide and lauryl diethyl amine oxide; alkanoyl amide alkyl dimethyl amine oxide such as lauric acid amidopropyl amine oxide. And the like. Especially, since the detergency with respect to an oil stain is especially favorable, the thing of an alkyl dimethylamine oxide type is more preferable.

(B) A component can be used individually by 1 type or in mixture of 2 or more types.
The content of the component (b) in the kitchen liquid detergent composition is preferably 1 to 20% by mass, more preferably 1 to 15% by mass, and further preferably 4 to 10% by mass. preferable.
(B) If content of a component is more than a lower limit, the cleaning power with respect to oil stains will improve more. On the other hand, when it is not more than the upper limit value, the storage stability under low temperature conditions is further improved. Moreover, the viscosity increase of a cleaning composition is suppressed and fluidity | liquidity becomes more favorable.

In the kitchen liquid detergent composition of the present invention, the ratio of the content of the component (a) to the content of the component (b) in the composition, that is, the mass ratio represented by (a) / (b) Is 1.5 to 3, preferably 1.5 to 2.5, and more preferably 2 to 2.5.
When the mass ratio represented by (a) / (b) is greater than or equal to the lower limit value, the detergency against oil stains is improved. In addition, the storage stability under low temperature conditions is improved. On the other hand, if it is less than or equal to the upper limit value, hand roughness is unlikely to occur and hand mildness is improved. In addition, white turbidity is less likely to occur during storage over time particularly at low temperatures, and storage stability is further improved.

<(C) component>
In the present invention, the component (c) is a nonionic surfactant.
Examples of the component (c) include polyoxyalkylene alkyl ethers, alkyl polyglycosides, fatty acid alkanolamides, polyoxyalkylene fatty acid alkanolamides, fatty acid amide derivatives such as alkylmethylglucamide; sorbitan fatty acid esters, polyoxyalkylene fatty acid esters, Long-chain fatty acid ester compounds such as fatty acid glycoside esters and fatty acid methyl glycoside esters are exemplified.
Of these, polyoxyalkylene alkyl ethers, fatty acid alkanolamides, polyoxyalkylene fatty acid alkanolamides, polyoxyalkylene fatty acid esters, and alkyl polyglycosides are preferred because of their mild hand skin properties. Ethers, ester-type polyoxyalkylene alkyl ethers, and fatty acid alkanolamides are particularly preferred.
In addition, in this invention, (c) component shall not contain semipolar surfactants, such as the amine oxide type surfactant mentioned above.

  Among the above, as a suitable polyoxyalkylene alkyl ether, a compound (c1) represented by the following general formula (c-1) can be exemplified.

［式中、Ｒ^１１は炭素数８〜１８のアルキル基又はアルケニル基を表し、Ｒ^１２は水素原子又は炭素数１〜３のアルキル基を表し、ｍ_１は３〜２５の数であり、ＡＯは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ¹¹ represents an alkyl group or alkenyl group having 8 to 18 carbon atoms, R ¹² represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, m ₁ is a number of 3 to 25, and AO Represents an oxyalkylene group having 2 to 4 carbon atoms. ]

In the formula (c-1), R ¹¹ represents an alkyl group having 8 to 18 carbon atoms or an alkenyl group having 8 to 18 carbon atoms, and may be linear or branched. .
In the alkyl group and alkenyl group of R ^11, the number of carbon atoms is 8 to 18, and the detergency against oil stains and storage stability under low temperature conditions are improved, so that the number of carbon atoms is preferably 10 to 14.
R ¹² represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.
m ₁ is a number of 3 to 25 indicating the average number of repetitions of the oxyalkylene group, and 5 to 25 is preferable.
AO represents an oxyalkylene group having 2 to 4 carbon atoms, and one kind may be used alone, or two or more kinds may be mixed. When two or more kinds are mixed, they may be mixed in a random manner or in a block shape.
If AO is the oxyethylene group, _{m 1} is the number of 3 to 25, preferably 5 to 25, 7 to 20 is more preferable.
Specifically as the compound (c1), in the general formula (c-1), R ¹¹ = linear alkyl group having 12 carbon atoms, R ¹² = hydrogen atom, m ₁ = 9, AO = oxyethylene group A compound represented by the formula (polyoxyethylene alkyl ether); R ¹¹ = linear alkyl group having 12 carbon atoms, R ¹² = hydrogen atom, m ₁ = 15, AO = oxyethylene group It is done.

  In addition, among the above, as a suitable ester type polyoxyalkylene alkyl ether, a compound (c2) represented by the following general formula (c-2) can be exemplified.

［式中、Ｒ^２１は炭素数６〜１８のアルキル基又はアルケニル基を表し、ｍ_２は３〜２５の数であり、ＡＯは炭素数２〜４のオキシアルキレン基を表す。］

[Wherein R ²¹ represents an alkyl group or alkenyl group having 6 to 18 carbon atoms, m ₂ represents a number of 3 to 25, and AO represents an oxyalkylene group having 2 to 4 carbon atoms. ]

In the formula (c-2), R ²¹ represents an alkyl group or alkenyl group having 6 to 18 carbon atoms, and may be linear or branched.
In the alkyl group and alkenyl group of R ²¹ , the carbon number is 6 to 18, and the detergency against oil stains and the storage stability under low temperature conditions are improved, and therefore the number of carbon atoms is preferably 8 to 16.
m ₂ is the number of 3 to 25 showing an average number of repeating oxyalkylene groups, 5 to 25 is preferred.
AO represents an oxyalkylene group having 2 to 4 carbon atoms and is the same as AO in the above formula (c-1).
If AO is the oxyethylene group, _{m 2} is the number of 3 to 25, preferably 5 to 25, 6 to 20 is more preferable.
Specifically, as the compound (c2), in the general formula (c-2), a compound represented by R ²¹ = a linear alkyl group having 10 carbon atoms, m ₂ = 10, AO = oxyethylene group ( Polyoxyethylene lauric acid methyl ester).

  Moreover, among the above, as a suitable fatty acid alkanolamide, the compound (c3) represented by the following general formula (c-3) can be exemplified.

［式中、Ｒ^３１は炭素数７〜１７のアルキル基を表す。Ｘは水素原子又はヒドロキシエチル基を表し、ｍ_３は０〜５の数である。］

[Wherein R ³¹ represents an alkyl group having 7 to 17 carbon atoms. X represents a hydrogen atom or a hydroxyethyl group, m ₃ is a number from 0 to 5. ]

In the formula (c-3), R ³¹ represents an alkyl group having 7 to 17 carbon atoms, and may be linear or branched.
In the alkyl group of R ³¹ , the carbon number is 7 to 17, and the detergency against oil stains and storage stability under low temperature conditions are improved, and therefore, the number of carbon atoms is preferably 11 to 13.
X represents a hydrogen atom or a hydroxyethyl group.
Specifically, as the compound (c3), in the general formula (c-3), R ³¹ = a linear alkyl group having 11 carbon atoms, X = hydroxyethyl group, m ₃ = 0 ( R ³¹ = straight alkyl group having 11 carbon atoms, X = hydrogen atom, compound represented by m ₃ = 0 (lauric acid monoethanolamide); R ³¹ = directly having 11 carbon atoms Examples thereof include a chain alkyl group, a compound represented by X = hydrogen atom, m ₃ = 2 (polyoxyethylene (2) lauric acid monoethanolamide).

(C) A component can be used individually by 1 type or in mixture of 2 or more types.
The content of the component (c) in the kitchen liquid detergent composition is preferably 1 to 25% by mass, more preferably 5 to 25% by mass, and further preferably 5 to 20% by mass. preferable.
When the content of the component (c) is at least the lower limit value, hand roughness is less likely to occur and the hand skin mildness is further improved. On the other hand, when it is less than or equal to the upper limit value, white turbidity is less likely to occur during storage over time particularly at low temperatures. Moreover, the viscosity increase of a cleaning composition is suppressed and fluidity | liquidity becomes more favorable.

In the liquid detergent composition for kitchens of this invention, it represents with the ratio of content of the component (a)-(c) in the said composition, ie, [(a) + (b)] / (c). The mass ratio is 1 to 4, and preferably 1.5 to 3.5.
When the mass ratio represented by [(a) + (b)] / (c) is the lower limit value or more, preferably the mass ratio is 1.5 or more, the detergency against oil stains is improved. On the other hand, when the amount is not more than the upper limit value, moist moisture is easily imparted to the hand skin, and the dryness of the hand skin is reduced. That is, by washing the components (a) to (c) in a well-balanced manner so that the mass ratio represented by [(a) + (b)] / (c) is within a predetermined range, washing against oil stains is performed. In addition to the effect, any effect of reducing the dryness of the hand skin can be obtained.

<(D) component>
In the present invention, the component (d) is a hydroxy acid or a salt thereof.
The component (d) may be any organic compound having a carboxy group (—COOH) and an alcoholic hydroxy group (—OH), such as glycolic acid, lactic acid, hydroxybutyric acid, malic acid, tartaric acid, citric acid, Examples thereof include gluconic acid, glyceric acid, tropic acid, benzylic acid or salts thereof. Especially, since it is excellent in the effect which reduces the dry feeling of a hand skin, lactic acid or its salt is especially preferable.
Examples of the salt form of the component (d) include alkali metal salts such as sodium and potassium; alkaline earth metal salts such as calcium and magnesium, and these may be mixed. Especially, since the effect which reduces the dry feeling of a hand skin is favorable, the salt of an alkali metal is preferable and a sodium salt is more preferable.

(D) A component can be used individually by 1 type or in mixture of 2 or more types.
The content of the component (d) in the kitchen liquid detergent composition is preferably 0.5 to 10% by mass, more preferably 1 to 8% by mass, and 2 to 7.5% by mass. More preferably it is.
When the content of the component (d) is equal to or higher than the lower limit, moist moisture is easily imparted to the hand skin, and the effect of reducing the dryness of the hand skin is further improved. On the other hand, if it is not more than the upper limit value, the detergency against oil stains is further improved.

In the kitchen liquid detergent composition of the present invention, the ratio of the content of the component (d) to the content of the component (c) in the composition, that is, the mass ratio represented by (d) / (c) Is 0.2 to 1, preferably 0.3 to 0.9.
When the mass ratio represented by (d) / (c) is equal to or greater than the lower limit, moist moisture is imparted to the hand skin, and the effect of reducing the dryness of the hand skin is improved. On the other hand, when the amount is not more than the upper limit, precipitation of the component (d) particularly at low temperatures is suppressed, and storage stability under low temperature conditions is improved.

<(E) component>
In the present invention, the component (e) is at least one hydrotrope selected from the group consisting of toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid, benzoic acid salt and ethanol. .
By containing (e) component, the storage stability (especially low temperature stability) of a cleaning composition improves and it becomes easy to ensure a transparent external appearance more stably.

In the component (e), toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid and cumenesulfonic acid salt may be any of the three isomers, o-form, m-form and p-form, and are easily available. P-form is preferable, and p-toluenesulfonic acid and p-toluenesulfonate are more preferable.
Salt forms in toluene sulfonate, cumene sulfonate, and benzoate include alkali metal salts such as sodium and potassium; alkaline earth metal salts such as magnesium and calcium; ammonium salts; monoethanolamine, diethanolamine And alkanolamine salts such as triethanolamine. Of these, alkali metal salts are preferable, and sodium salts are more preferable.

  Among these, as the component (e), since it is excellent in storage stability even under a low temperature condition, toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid, benzoic acid It is preferably at least two selected from the group consisting of a salt and ethanol, and among them, from the group consisting of toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid and benzoic acid salt It is more preferable to use ethanol in combination with at least one selected (hereinafter, a hydrotrope selected from this group is referred to as “component (e1)”).

(E) A component can be used individually by 1 type or in mixture of 2 or more types.
The content of the component (e) in the kitchen liquid detergent composition is preferably 1 to 15% by mass, more preferably 3 to 15% by mass, and further preferably 5 to 15% by mass. preferable.
When the content of the component (e) is at least the lower limit value, the transparent appearance of the liquid detergent composition can be more stably maintained during storage over time, whether at room temperature or low temperature. On the other hand, if it is not more than the upper limit value, the detergency against oil stains is further improved.

As the component (e), when the component (e1) and ethanol are used in combination, the mixing ratio of the component (e1) and ethanol is (e1) component / ethanol = 0.5 / 10-25 / 10 is preferable, and 0.5 / 8 to 10/10 is more preferable.
When the blending ratio of the component (e1) to ethanol is equal to or higher than the lower limit value, it becomes easier to maintain a transparent appearance particularly under low temperature conditions. On the other hand, when it is at most the upper limit value, the low temperature stability is further improved. Further, the viscosity of the cleaning composition is suppressed and the fluidity is improved.

<Optional component>
In addition to the components (a) to (e) described above, the kitchen liquid detergent composition of the present invention is usually a component that is usually used in a detergent composition for hard surfaces or clothing. Can be appropriately blended within a range not impairing the effects of the present invention.

As an arbitrary component, you may mix | blend surfactant other than (a) component, (b) component, and (c) component, for example. Specific examples include cationic surfactants such as alkyltrimethylammonium salts, dialkyldimethylammonium salts, and alkylpyridinium salts, and amphoteric surfactants.
Examples of amphoteric surfactants include betaine types such as aminoacetic acid betaine and sulfobetaine; amino acid types such as glycine type and aminopropionic acid type.
Specifically, betaine aminoacetates such as lauryldimethylaminoacetic acid betaine, lauric acid amidopropyldimethylaminoacetic acid betaine; N-lauryl-N, N-dimethylammonium-N-propylsulfobetaine, N-lauryl-N, N- Sulfobetaines such as dimethylammonium-N- (2-hydroxypropyl) sulfobetaine; glycine-based compounds such as 2-lauryl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldiaminoethylglycine sodium; laurylamino Examples include aminopropionic acid-based compounds such as sodium propionate and sodium laurylaminodipropionate.

Moreover, you may mix | blend the hydrotrope agent other than (e) component with the liquid cleaning composition for kitchens of this invention.
Examples of hydrotropes other than component (e) include water-soluble solvents such as propylene glycol and polyethylene glycol; aromatic sulfonic acids such as xylene sulfonic acid, substituted or unsubstituted naphthalene sulfonic acid, or salts thereof, aromatic carboxylic acids or And salts thereof (excluding benzoic acid or salts thereof).

  Further, the kitchen liquid detergent composition of the present invention also includes, as optional components, a pH adjuster such as sodium hydroxide and sulfuric acid; an inorganic builder such as magnesium sulfate and zinc sulfate; a fragrance, a dye, and a radical trapping agent. can do.

The pH of the liquid detergent composition for kitchen of the present invention is preferably 6 to 8 at 25 ° C., more preferably 6.5 to 7.5.
When the pH of the liquid cleaning composition for kitchen is 6 or more, the interaction between the component (a) and the component (b) is moderately suppressed and not too strong, and the transparent appearance of the liquid cleaning composition is more stable. Easy to keep. In addition, gelation or solidification of the liquid detergent composition is less likely to occur. On the other hand, when the pH is 8 or less, the interaction between the component (a) and the component (b) does not become too weak, and the detergency against oil stains is further improved.
The pH of the liquid detergent composition for kitchen (controlled at 25 ° C.) is measured by a method based on JIS K3362-1998 using a pH meter (product name: Horiba F-22, manufactured by Horiba, Ltd.). Value.

  As described above, the liquid detergent composition for kitchen of the present invention has good detergency against oil stains due to the synergistic effect of the components (a) to (e), and reduced hand roughness and excellent hand skin mildness. In addition, moisturizing is given to the hand skin after washing, the dryness of the hand skin is reduced, and a transparent appearance can be secured stably.

In conventional kitchen detergent compositions, a nonionic surfactant (c) is generally used in order to reduce chemical irritation to the skin and the like of the surfactant used as a cleaning component.
When component (c) is used as a cleaning component, chemical irritation to the skin and the like is alleviated compared to the case where other surfactants are used, and hand roughness is reduced (the mildness of the hand skin is increased). In the method using the component c), the feel of the hand skin that is felt when the hands are rubbed after washing has not been improved.
In addition, when a feel-imparting component is blended together with a cleaning component in order to improve the feel of the hand skin, there is a problem that the detergency against oil stains tends to decrease. In addition, the cleaning composition tends to become cloudy at that time, and it may be difficult to ensure a stable transparent appearance not only during storage at low temperatures but also during storage at room temperature. .

The liquid detergent composition for kitchen of the present invention contains an anionic surfactant (a) and a semipolar surfactant (b) in addition to the component (c), and is represented by (a) / (b). The mass ratio is 1.5-3.
“The mass ratio represented by (a) / (b) is 1.5 to 3” indicates that the content of the component (b) is larger than that of the conventional component with respect to the component (a). By setting it as this mass ratio, since the interaction of (a) component and (b) component becomes strong, detergency improves. Furthermore, by setting it as this mass ratio, the component (a) which exists free is reduced by interaction of both surfactant. In addition to this, since the component (c) is blended, the present invention is a cleansing composition having a mild hand skin gentleness gentle to the hand skin in which chemical irritation to the skin and the like is alleviated.

Moreover, in this invention, the mass ratio represented by (a) / (b) is 1.5-3, and also added (c) component [(a) + (b)] / (c) The mass ratio represented by (d) / (c) with addition of a hydroxy acid or a salt thereof (d) is 0.2 to 1.
As described above, the liquid detergent composition for kitchen of the present invention contains the component (d) and has a cleaning power against oil stains, mildness of hand skin, reduction of dryness of hand skin and storage stability (transparent appearance). The optimum surfactant composition has been found to satisfy all the characteristics of
Furthermore, in this invention, (e) component which is a hydrotrope agent is contained. Thereby, it is possible to stably ensure a transparent appearance when stored over time, both at room temperature and at low temperature.

  According to the present invention, there is provided a liquid detergent composition suitable for kitchen use, which has high detergency against oil stains, has little hand roughness, and meets consumer needs for a good feel on the skin after washing. it can.

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

≪Manufacture of liquid detergent composition≫
According to the blending composition shown in Tables 1 to 3, the liquid cleaning composition of each example was prepared by the following production method (when there is an unblended component, the component is not blended). The unit of the compounding amount in Tables 1 to 3 is mass%, and any component indicates a pure equivalent amount.
In addition, the liquid cleaning composition of each example was prepared so that the sum total of each component as described in a table | surface might be 100 mass%. Each component used was kept at 50 ° C.

[Method for producing liquid detergent composition]
First, (a) component, (c) component, (d) component, (e) component, and a common component were put into a 200 mL beaker, and it stirred with the magnetic stirrer. Next, the component (b) was added and stirred.
Thereafter, purified water is added and balanced so that the total amount (the total amount is 100 parts by mass) is 93 parts by mass, and after stirring, the pH is adjusted so that the total amount becomes 100% by mass. The remaining ethanol was added to produce a liquid detergent composition.
The pH is adjusted by adjusting the pH adjusting agent (0.1N sodium hydroxide or 0.1N sulfuric acid) in an appropriate amount so that the pH at 25 ° C. of the liquid detergent composition (stock solution) of each example becomes the value shown in the table. This was done by adding.
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.

In the table, (a) / (b), [(a) + (b)] / (c), and (d) / (c) all mean the proportion (mass ratio) of the amounts of each component.
Below, the component shown in the table | surface is demonstrated.

(A) Component NRES: Sodium polyoxyethylene alkyl ether sulfate (carbon atoms 12 and 14, alkyl group having an average addition mole number of 2, 2 narrow ratio, n _max = 2 in the above formula (S), ethylene oxide Of the adduct of ethylene oxide in which the number of added moles of n is n _max Y _nmax = Y ₂ = 25 (mass%), the ratio of the adduct of ethylene oxide in which the number of added moles of ethylene oxide is zero Y ₀ = 13 (mass%) ); Raw material alcohol: CO1270 [made by P & G, C12 / C14 = 7/3 by mass ratio of C12 alcohol (C12) and C14 alcohol (C14), linearity 100% by mass ( Branching rate 0% by mass)].

[NRES synthesis method]
The above CO1270 was used as a raw material alcohol.
In a 4 L autoclave, 400 g of the raw material alcohol and 0.4 g of a composite metal oxide Lewis acid sintered solid catalyst composed of Al / Mg / Mn were charged, and the autoclave was purged with nitrogen and stirred. The temperature rose. Thereafter, 54 g of ethylene oxide was introduced while maintaining the temperature at 180 ° C. and the pressure at 0.3 mPa, to obtain a reaction product (alcohol ethoxylate).
Next, 274 g of the alcohol ethoxylate obtained above was placed in a 500 mL flask equipped with a stirrer, and after nitrogen substitution, 81 g of liquid anhydrous sulfuric acid (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 to obtain the desired polyoxyethylene alkyl ether sulfuric acid. Further, this was neutralized with an aqueous sodium hydroxide solution to obtain NRES.

[Narrow rate measurement method]
For NRES, the distribution of ethylene oxide adducts with different numbers of moles of ethylene oxide was measured under the following measurement conditions. And the narrow rate (mass%) of NRES was computed based on the said Numerical formula (S).
(Measurement conditions for 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 Du Pont)
Mobile phase: acetonitrile / water = 60/40 (volume ratio)
Flow rate: 1 mL / min
Temperature: 20 ° C

SAS: Secondary sodium alkane sulfonate, manufactured by Clariant Japan, trade name “HOSTAPUR SAS 60”.
AOS: sodium α-olefin sulfonate, manufactured by Lion Corporation, trade name “Lipolane LB-440”.

-(B) component AX agent: Alkyl dimethyl amine oxide (carbon number 12 of an alkyl group), the product made from Lion Akzo, brand name "Aromox DM12D-W".

-Component (c) AE (15): polyoxyethylene lauryl ether (average number of moles of ethylene oxide added 15), manufactured by Lion Corporation, trade name "Rheox LC-150"; R in the above general formula (c-1) ¹¹ = straight-chain alkyl group of 12 carbon ^{atoms, R 12} = hydrogen _atom, m 1 = _15, AO = oxyethylene group.
LME (2): polyoxyethylene lauric acid monoethanolamide (average added mole number of ethylene oxide 2), Kawaken Fine Chemical Co., Ltd., trade name “Amidette 2L-Y”; R ³¹ in the above general formula (c-3) = C11 linear alkyl group, X = hydrogen atom, m ₃ = 2).

-(D) component Lactic acid Na: Sodium lactate, the Pulac Japan Co., Ltd. make, brand name "fermented sodium lactate 60% (S / HQ60)".
Malate Na: sodium malate, manufactured by Fuso Chemical Industry Co., Ltd., trade name “DL-sodium malate”.

-(E) component PTS-H: Paratoluenesulfonic acid, the Teica Co., Ltd. make, brand name "Taikatox 300".
Cumene sulfonate Na: manufactured by Teika Tox Co., Ltd., trade name “Taika Tox N5040”.
Benzoic acid: trade name “RKG-27 sodium benzoate” manufactured by Fushimi Pharmaceutical Co., Ltd.
Ethanol: Made by Pure Chemical Co., Ltd., reagent grade.

・ Optional components (common components)
Fragrance: Fragrance composition A described in JP-A No. 2002-327194.
Na hydroxide: sodium hydroxide, manufactured by Tsurumi Soda Co., Ltd.
Sulfuric acid: Toho Zinc Co., Ltd.

Composition of common ingredients:
The content (blending amount) in the liquid detergent composition is shown. The unit of the blending amount is% by mass, and all the components indicate the amount equivalent to pure content.
Fragrance: 0.3% by mass
Sodium hydroxide or sulfuric acid: appropriate amount (amount used to adjust to the pH shown in the table)
Purified water: Balance

≪Evaluation of liquid detergent composition≫
About each liquid detergent composition of each example, each evaluation was performed with the evaluation method shown below, and the result was written together in Tables 1-3.

[Evaluation of detergency against oil stains]
1 g of beef tallow (trade name: beef tallow, manufactured by Wako Pure Chemical Industries, Ltd.) was applied uniformly over the entire inner surface of a tapper container having a length of 10 cm, a width of 15 cm and a height of 5 cm. .
Next, 38 g of tap water and 2 g of the liquid detergent composition of each example were placed in a dishwashing sponge measuring 11.5 cm long x 7.5 cm wide x 3 cm high, and after being rubbed by hand several times, beef tallow was applied. The tapper container was washed with tap water at 25 ° C. in the same manner as that usually performed at home. After washing, it was rinsed well with tap water, and the tactile sensation when the part (contaminated part) to which the beef tallow was applied was touched by hand was evaluated.
This evaluation was performed based on the following evaluation criteria (（to ○ are acceptable ranges), and was used to evaluate the cleaning power against oil stains.
(Evaluation criteria)
A: When any part of the contaminated part inside the tapper container was touched, the presence of the oil film was not felt, and the oily residue was not felt at all.
○: Even if the bottom and side surfaces inside the tapper container are touched, the presence of a film due to oil is not felt, and no sliminess due to residual oil is felt, and a slight moisture remains in the corner portion inside the tapper container. It was about.
Δ: Touching the bottom surface inside the tappa container does not feel the presence of a film due to oil and does not feel any sliminess due to residual oil, but it remains on the sides or corners inside the tappa container. It was.
X: It was found that the whole tapper container was slippery and oil remained clearly.

[Evaluation of mildness of hand skin]
Prepare an aqueous solution (concentration of 1% by weight of the liquid detergent composition) in which the liquid detergent composition of each example was dissolved in tap water, and immerse your hands to the wrist for 30 minutes a day in a bowl containing 3 liters of the aqueous solution. I let you. The next day after repeating this operation for 3 days, the state of rough hands (erythema and desquamation of the hands) was visually observed and evaluated based on the following evaluation criteria.
(Erythema on the hands)
The hand erythema was visually observed to evaluate the degree of redness.
4 points: Not red at all. 3 points: Almost no red. 2 points: It was a little red. 1 point: It was very red.
(Desquamation)
The desquamation means that the keratinocytes peel off from the healthy skin surface, and the peeled keratinocytes look white. Therefore, the hand was observed visually, and the state of wiping the white powder was evaluated.
4 points: No white powder was visible. 3 points: Almost no white powder was visible. 2 points: A little white powder was seen. 1 point: Many white powders were visible.

Subsequently, the score of the hand erythema and the score of desquamation were calculated, and the mildness of the hand skin was evaluated based on the evaluation criteria described later. ○ indicates that there is no problem, and Δ and × indicate that there is a problem.
(Evaluation criteria) ○: 5 to 8 points Δ: 3 to 4 points ×: 1 to 2 points

[Evaluation of dryness of hand skin]
The liquid detergent composition of each example was transferred to 30 households and used for 2 weeks, and then the dry feeling of the hand skin after use (after towel drying) was evaluated.
This evaluation is based on the following feeling that the hands feel dry and the skin feels dry and `` feels dry on the hands '', and the moist and moist when it feels dry The evaluation was performed based on the evaluation criteria, and the average value of the evaluation scores of 30 homes was obtained.
(Evaluation criteria)
5 points: No dryness was felt on the hand skin.
4 points: Dried feeling was not felt to the skin.
3 points: The hand skin did not feel very dry.
2 points: Some dryness was felt on the hand skin.
1 point: A dry feeling was clearly felt on the hand skin.

[Evaluation of storage stability (25 ° C)]
150 mL of the liquid detergent composition of each example was accommodated in a cylindrical glass bottle with a diameter of 50 mm and a height of 100 mm, and the lid was closed and sealed. In this state, the appearance of the liquid detergent composition after being stored in a thermostatic chamber at 25 ° C. (room temperature condition) for 1 month is visually observed, and based on the following evaluation criteria, the storage stability of the liquid detergent composition is stable. The property (appearance) was evaluated.
(Evaluation criteria) ○: Transparent appearance and no problem ×: Opaque appearance and no problem

[Evaluation of storage stability (−5 ° C.)]
100 mL of the liquid detergent composition of each example was placed in a cylindrical glass bottle with a diameter of 50 mm and a height of 100 mm, and the lid was closed and sealed. In this state, the appearance of the liquid detergent composition after being stored for 1 month in a thermostatic bath at −5 ° C. (low temperature condition) was visually observed and based on the following evaluation criteria (◎ to ○ are acceptable ranges). The storage stability (appearance) of the liquid detergent composition was evaluated.
(Evaluation criteria)
A: Uniform and transparent.
○: A level that seems to be due to the concentration gradient, but has no problem, but has no problem.
Δ: Some cloudiness or precipitation is observed, but when it is left at room temperature, it becomes uniform and transparent immediately.
X: The whole is cloudy or precipitated.

  As is clear from the results of Tables 1 to 3, the liquid detergent compositions of Examples 1 to 27 according to the present invention were more oily than the liquid detergent compositions of Comparative Examples 1 to 11 different from the present invention. It was confirmed that the cleansing power against the skin was excellent, the mildness of the hand skin was excellent, the effect of reducing the dryness of the hand skin was excellent, and the transparent appearance could be secured stably.

Claims (2)

An anionic surfactant (a);
A semipolar surfactant (b);
A nonionic surfactant (c);
Hydroxy acid or a salt thereof (d);
Containing at least one hydrotrope (e) selected from the group consisting of toluenesulfonic acid, toluenesulfonic acid salt, cumenesulfonic acid, cumenesulfonic acid salt, benzoic acid, benzoic acid salt and ethanol,
The mass ratio represented by (a) / (b) is 1.5-3,
The mass ratio represented by [(a) + (b)] / (c) is 1 to 4,
And the mass ratio represented by (d) / (c) is 0.2-1, The liquid cleaning composition for kitchens characterized by the above-mentioned.   The kitchen detergent composition according to claim 1, wherein the component (d) is lactic acid or a salt thereof.