JPH0631405B2 - Liquid detergent composition - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a liquid detergent composition having excellent cleaning performance and foam stability, which is mild to the skin and has good storage stability.

2. Description of the Related Art In recent years, as performance required for kitchen detergents and shampoos, in addition to excellent cleaning power and super foaming power, it is important that they have low toxicity and are mild to the skin. As a detergent composition satisfying such performances,
For example, a liquid detergent composition comprising alkyl ether sulfate and alkyl amine oxide such as alkyl dimethyl amine oxide (Japanese Patent Publication No. 39-14979).
JP-A-59-1597) is known.

However, when an alkyl ether sulfate and an alkyl amine oxide are used in combination, the low temperature stability and the compatibility are often deteriorated and turbidity occurs, so that the commercial value as a cleaning agent is often significantly impaired.

Therefore, in order to improve such a drawback, it is necessary to change the number of moles of ethylene oxide added to the alkyl ether sulfate or to combine two kinds having different numbers of moles of addition, change the blending ratio, or add a hydrophilic solvent or hydrotrope. However, on the contrary, the thickening effect, which is one of the characteristics of the alkylamine oxide, decreases, and the characteristics of the alkyl ether sulfate and the alkylamine oxide cannot be utilized.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention has excellent storage stability such as low temperature stability in combination with an alkyl ether sulfate and an amine oxide type surfactant, and has excellent detergency and super-foaming power. Another object of the present invention is to provide a cleansing composition that is gentle on the skin.

Means for Solving the Problems The above problems can be solved by selecting a characteristic amido amine oxide as an amine oxide type surfactant, and blending it with an alkyl ether sulfate and an alkanol amide.

That is, the present invention relates to a liquid detergent composition comprising the following three components (A), (B) and (C).

(Wherein R ₁ CO represents a saturated or unsaturated fatty acid residue having 10 to 20 carbon atoms, and R ₂ and R ₃ represent a methyl group, an ethyl group or a hydroxyethyl group). 5 to 15% by weight.

(B) General formula (II) R ₄ O (CH ₂ CH ₂ O) _m SO ₃ M (II) (In the formula, R ₄ is a linear or branched alkyl group having 9 to 15 carbon atoms, and m is An integer of 2 to 7, and M represents at least one selected from alkali metal, alkaline earth metal, ammonium and cation residues of alkanolamines) 1.5 to 30% by weight.

(C) General formula (III) (In the formula, R ₅ CO is a saturated or unsaturated fatty acid residue having 10 to 20 carbon atoms, n1 is an integer of 1 to 20, n2 is
Represents an integer of 0 to 20) 1.0 to 10% by weight.

The first component amidoamine oxide used in the present invention is a compound represented by the above general formula (I), wherein R
_As fatty acid residues that can be ₁ CO groups, lauric acid,
Examples thereof include fatty acid residues such as myristic acid, palmitic acid, oleic acid, stearic acid, isostearic acid, coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, and rapeseed oil fatty acid. Typical examples of the amine oxide represented by the general formula (I) include lauramidopropyldimethylamine oxide, oleamidopropyldimethylamine oxide, and coco (coconut oil fatty acid acyl) amidopropyldimethylamine oxide.

The method for producing the amidoamine oxide of the general formula (I) is not particularly limited, but for example, an amidoamine compound obtained by condensing a fatty acid such as lauric acid or a lower alkyl ester thereof and dimethylaminopropylamine is reacted with hydrogen peroxide. There is a way.

The second component, alkyl ether sulphate, used in the present invention is a compound represented by the general formula (II).
R _{4 in the} general formula (II) is an alcohol derived from a natural oil or fat such as coconut oil as a raw material alcohol, a synthetic alcohol containing a branched chain derived from an olefin by the oxo method, a straight chain derived from ethylene by the Ziegler method. A synthetic alcohol or the like is used. Examples of the salt of alkyl ether sulfate include alkali metal salts such as sodium salt and potassium salt, ammonium salt, and alkanolamine salts such as monoethanolamine salt and triethanolamine salt.

The alkanolamide used as the third component of the present invention is a compound represented by the above general formula (III), and as the fatty acid residue capable of becoming an R ₅ CO group in the formula, lauric acid, myristic acid, palmitic acid, olein Acid, stearic acid, isostearic acid, coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, rapeseed oil fatty acid, and other fatty acid residues can be mentioned. Practically, n1 of the general formula (III) is preferably 1 to 10 and n2 is preferably 0 to 10.

The blending ratio of each component in the present invention is as described above, and if each component exceeds the range of the blending ratio, the following defects occur, which is not preferable.

That is, the first component amidoamine oxide is 1.5
If it is less than 15% by weight, foaming, detergency and storage stability are inferior, and if it exceeds 15% by weight, the viscosity of the detergent is rapidly increased and it becomes difficult to control the viscosity.

If the proportion of the second component, alkyl ether sulphate, is less than 1.5% by weight, foaming and detergency are inferior, and if it exceeds 30% by weight, the viscosity of the cleaning agent suddenly increases and it becomes difficult to control the viscosity and irritation to the skin. It is not preferable because the property is increased, and the storage stability is decreased.

The compounding ratio of the third component alkanolamide is 1.0
If it is less than 10% by weight, the storage stability, thickening and foaming effects cannot be expected, and if it exceeds 10% by weight, the storage stability is lowered, and the viscosity of the detergent is rapidly increased, making it difficult to control the viscosity.

As long as the object of the present invention is not impaired, other anionic surfactants, nonionic surfactants, amphoteric surfactants, and dyes, perfumes, hydrotropes, sequestering agents commonly used in liquid detergent compositions. Auxiliary agents such as antibacterial agents and moisturizers may be added.

Action The reason why the storage stability of the liquid detergent composition of the present invention is improved is considered to be due to the synergistic effect of the three components of amidoamine oxide, alkyl ether sulfate and alkanolamide, but the detailed reason is unknown. .

Examples 1 to 7 and Comparative Examples 1 to 6 Dissolve the surfactant having the composition ratio shown in Table 1 in distilled water,
The pH was adjusted to 6.0 with citric acid, the cleaning agent of the present invention and the cleaning agent of the comparative example were adjusted, and the storage stability thereof was investigated. In addition, the numerical value of each component in a table | surface represents weight%.

The viscosity of the detergent was measured using a B-type viscometer, and the storage stability was subjected to the following low temperature stability test and high temperature stability test.

(Low-temperature stability test) The detergent was put in a test tube, and the appearance when stored in a constant temperature bath at -5 ° C for 3 days was visually observed.

(High temperature stability test) Put the cleaning agent in a 100 cc transparent bottle and put it in a 50 ° C constant temperature bath.
The appearance when stored for a month was visually observed.

(Judgment Criteria) Judgment of low temperature stability and high temperature stability was evaluated according to the following criteria.

○: Transparent liquid △: Opaque liquid ×: White turbid or separated liquid From the results shown in Table 1, the liquid cleaning composition of the present invention has excellent storage stability and is easy to control viscosity, whereas the cleaning agent of Comparative Example has poor storage stability or difficult viscosity control. It is clear that there is.

Example 8 (shampoo) -lauramidopropyldimethyl% amine oxide 5.0-polyoxyethylene cocoyl ether sodium sulfate (EO average addition mole number 2) 10.0-lauric acid monoethanolamide polyethoxylate (EO average addition mole) 10) 3.0-Amount of citric acid to be pH 7.0 -Distilled water balance 100.0 Example 9 (shampoo) -Cocamidopropyldiethyl% amine oxide 7.0-Polyoxyethylene lauryl ether sodium sulfate (EO average) Addition mol number 5) 7.0-Lauric acid diethanolamide 2.0-Sodium α-olefin sulfonate 3.0-Amount of citric acid to be pH 6.0 -Distilled water balance 100.0 Obtained in Examples 8 to 9 above The resulting shampoo has good storage stability Foaming excellent and cleanability, it was observed less irritating to the eye.

Example 10 (Kitchen detergent) -Myristiamidopropyl dimethyl% amine oxide 3.0-Polyoxyethylene lauryl ether sulfate (EO average addition mole number 5) 8.0-Palm oil fatty acid diethanolamide 3.0-Dodecylbenzene sulfone Sodium acid salt 3.0 ・ Sodium xylene sulfonate 3.0 ・ Ethanol 2.0 ・ Distilled water balance 100.0 Example 11 (kitchen detergent) ・ Tallow amidopropyl dimethyl% amine oxide 2.0 ・ Cocamidopropyl bis (2 -Hydroxyethyl) amine oxide 2.0-polyoxyethylene alkyl ether sodium sulfate ¹⁾ (EO average addition mole number 5) 8.5-coconut oil fatty acid monoethanolamide polyethoxylate (EO average addition mole number 5) 2. 0 ・ Etano Le 3.0 Distilled water 65.0 100.0 Note 1) alkyl groups _C 12 _{-C 13,} the ratio is 44
/ 56, and the linear rate is 80%.

It was confirmed that the kitchen detergents obtained in the above Examples 10 and 11 exhibited excellent low temperature stability, had foaming as the kitchen detergent, and had good detergency.

Example 12 (Hand Cleaner)%-Castor oil fatty acid amide propyl dimethylamine oxide 3.0-Polyoxyethylene lauryl ether sulfate (EO equilibrium addition mole number 5) 8.0-lauric acid diethanolamide 2.0-lauryl alcohol sulfate Ester sodium salt 12.0 ・ Citric acid pH 6.5 amount ・ Distilled water balance 100.0 The above hand cleaner is a viscous transparent liquid that exhibits excellent low-temperature stability, and is a foam as a hand cleaner.
It was confirmed that the detergency was excellent and the skin was not irritated.

Effects of the Invention The liquid detergent composition of the present invention has the following excellent features.

(1) Good storage stability at low and high temperatures.

(2) It has excellent detergency and super-foaming power, and is mild to the skin.

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area C11D 1:29 1:75)

Claims (3)

[Claims] 1. A liquid detergent composition comprising the following three components (A), (B) and (C). (A) General formula (I) (Wherein R ₁ CO represents a saturated or unsaturated fatty acid residue having 10 to 20 carbon atoms, and R ₂ and R ₃ represent a methyl group, an ethyl group or a hydroxyethyl group). 5 to 15% by weight. (B) General formula (II) R ₄ O (CH ₂ CH ₂ O) _m SO ₃ M (II) (In the formula, R ₄ is a linear or branched alkyl group having 9 to 15 carbon atoms, and m is An integer of 2 to 7, M represents at least one selected from the cation residues of alkali metal, alkaline earth metal, ammonium and alkanolamine) 1.5 to 30% by weight (C) General Formula (III) (In the formula, R ₅ CO is a saturated or unsaturated fatty acid residue having 10 to 20 carbon atoms, n1 is an integer of 1 to 20, n2 is
Represents an integer of 0 to 20) 1.0 to 10% by weight 2. The composition according to claim 1, wherein R ₂ and R ₃ of the general formula (I) are each a methyl group. 3. The composition according to claim 1, wherein M in the general formula (II) is sodium.