JPS6220597A - Liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid detergent composition that has excellent cleaning performance and foam stability, is mild to the skin, and has good storage stability. .

[1 Tragedy 11] In recent years, in addition to excellent detergency and foaming power, it is important that kitchen detergents and shampoos have low toxicity and are gentle on the skin. As a cleaning composition that satisfies these various performances, for example, a liquid cleaning composition comprising an alkyl ether sulfate and an alkyl amine oxide such as an alkyldimethylamine oxide (Japanese Patent Publication No. 39-14979, Japanese Patent Application Laid-Open No. 59-1597) )It has been known.

However, when alkyl ether sulfates and alkyl amine oxides are combined, low-temperature stability and compatibility often deteriorate and turbidity occurs, which often significantly impairs commercial value as a cleaning agent.

Therefore, in order to improve such drawbacks, the number of moles of ethylene oxide added to the alkyl ether sulfate was changed, or two types with different numbers of moles of added ethylene oxide were combined,
It is not possible to take advantage of the properties of alkyl ether sulfates and alkyl amine oxides, as it requires changing the blending ratio or adding hydrophilic solvents or hydrotropes, and conversely, the thickening effect, which is one of the properties of alkyl amine oxides, decreases. I can't.

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In combination with alkyl ether sulfate and amine oxide type surfactants, the present invention has good storage stability such as low temperature stability, excellent detergency and foaming power, and is gentle on the skin. An object of the present invention is to provide a cleaning composition.

The aforementioned problems can be solved by selecting a specific amidoamine oxide as the amine oxide type surfactant and blending it with an alkyl ether sulfate and an alkanolamide.

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

R1CON H(CR2) 3 N→0 (■> (However, in the formula, R and CO are saturated or unsaturated fatty acid residues having 10 to 20 carbon atoms, R2 and R3 are methyl groups,
1.5 to 15% by weight of amidoamine oxide (representing an ethyl group or a hydroxyethyl group).

(B) General formula (II) R40(CH2CR20)-303M (II>(
In the formula, R4 is a linear or branched alkyl group having 9 to 15 carbon atoms, m is an integer of 2 to 7, and M is selected from cationic residues of alkali metals, alkaline earth metals, ammonium, and alkanolamines. 1.5 to 30% by weight of at least one alkyl ether sulfate.

(C) General formula (I [I) (in the formula, R5CO is a saturated or unsaturated fatty acid residue having 10 to 2 carbon atoms, nl is an integer of 1 to 20, R2
represents an integer from 0 to 20) from 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), in which R
, fatty acid residues that can become CO groups include lauric acid,
Examples include residues of fatty acids 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.

Representative compounds of the amine oxide of general formula (I) include lauramidopropyldimethylamine oxide, oleamidopropyldimethylamine oxide, and coco (coconut oil fatty acid acyl)amidopropyl dimethylamine oxide. It will be done.

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

The second component alkyl ether sulfate used in the present invention is a compound represented by the general formula (II). R4 in general formula (II) is an alcohol derived from natural fats and oils such as coconut oil as a raw material alcohol, a synthetic alcohol containing a branched chain derived from an olefin by the oxo method, and a linear alcohol derived from ethylene by the Ziegler method. Synthetic alcohol etc. are used. Examples of the salts of alkyl ether sulfates include alkali metal salts such as sodium salts and potassium salts, ammonium salts, and alkanolamine salts such as monoethanolamine salts and triethanolamine salts.

The alkanolamide used as the third component of the present invention is a compound represented by the general formula (I , oleic acid, stearic acid, isostearic acid, coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, and rapeseed oil fatty acid residues.

Practically, nl in general formula (III) is 1 to 10. 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 disadvantages occur, which is not preferable.

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

If the proportion of the second component, alkyl ether sulfate, is less than 1.5% by weight, foaming and cleaning power will be poor; if it exceeds 30% by weight, the viscosity of the detergent will increase rapidly, making it difficult to control the viscosity and causing irritation to the skin. This is undesirable because the properties become stronger, and the storage stability also decreases.

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

Other anionic surfactants, nonionic surfactants, amphoteric surfactants, dyes, fragrances, hydrotropes, sequestering agents commonly used in liquid detergent compositions, as long as they do not impair the purpose of the invention. , antibacterial agents, humectants, and other auxiliary agents may be added.

The improved storage stability of the liquid detergent composition of the present invention is believed to be due to the synergistic effect of the three components: amidoamine oxide, alkyl ether sulfate, and alkanolamide.

The reason is unknown.

E1 Takumi LヱL, Comparative Examples 1 to 6 A surfactant having the composition ratio shown in Table 1 was dissolved in distilled water,
A cleaning agent of the present invention and a cleaning agent of a comparative example were prepared by adjusting the pH to 6.0 with citric acid, and their storage stability was investigated. In addition, the numerical value of each component in a table|surface represents weight%.

The viscosity of the cleaning agent was measured using a B-type viscometer, and the following low-temperature stability test and high-temperature stability test were conducted to check storage stability.

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

(High-temperature stability test) The detergent was placed in a 100 cc transparent bottle and stored in a constant water tank at 50° C. for one month, and its appearance was visually observed.

(Judgment Criteria) Low-temperature stability and high-temperature stability were evaluated based on the following criteria.

○: Transparent liquid Δ: Opaque liquid ×: Cloudy or separated liquid From the results in Table 1, the liquid cleaning composition of the present invention has storage stability. In contrast, it is clear that the detergents of Comparative Examples either have poor storage stability or are difficult to control viscosity.

Example 8 (Shampoo) Laudemidoprobyl dimethyl % Amine oxide 5.0 Sodium polyoxyethylene cocoyl ether sulfate (EO average added mole number 2) 10.0 Lauric acid monoethanolamide polyethoxylate (EO average Number of moles added 10) 3.0 Citric acid Amount to make pH 7.0
Burns 100.0 Example 9 (Shampoo) - Cocoamidopropyl diethyl % Amine oxide 7.0 - Sodium polyoxyethylene lauryl ether sulfate (EO average added mole number 5) 7.0 - Lauric acid jetanolamide 2.0 Sodium α-olefin sulfonate 3.0 Citric acid
Amount to make pH 6.0
Burns: 100.0 The shampoos obtained in Examples 8 and 9 above had good storage stability, excellent lathering and cleansing properties, and were found to be less irritating to the eyes.

Example 10 (Dish detergent) - Myristiamidopropyl dimethyl % Amine oxide 3.0 - Polyoxyethylene lauryl ether sulfate (EO average added mole number 5) 8.0 - Coconut oil fatty acid jetanolamide 3.0 - Dodecylbenzene Sodium sulfonate 3.0, Sodium xylene sulfonate 3.0, Ethanol
2.0・
Burns 100.0 Example 11 (Dish detergent) - Beef tallow amidopropyl dimethyl % Amine oxide 2.0 - Cocoamidopropyl bis(2-hydroxyethyl) amine oxide 2.0 - Sodium polyoxyethylene alkyl ether sulfate 1) (EO Average number of added moles 5) 8.5 Coconut oil fatty acid monoethanolamide polyethoxylate (EO average number of added moles 5) 2.0 Ethanol 3.0
65.0100.0 Note 1) The alkyl group is CI2 to C13, and the ratio is 44
156, and the linearity rate is 80%.

The kitchen detergents obtained in Examples 10 and 11 were found to exhibit excellent low-temperature stability and to have good foaming and detergency as kitchen detergents.

Example 12 (Hand cleaner) % Castor oil fatty acid amidopropyl dimethylamine oxide 3.0 Polyoxyethylene lauryl ether sulfate (EO average added mole number 5 > 8.0 Lauric acid jetanolamide 2.0 Lauryl alcohol Sulfate ester sodium salt 12.0/citric acid Amount to make pH 6.5,
Burns ioo.

The above hand cleaner is a viscous, transparent liquid that exhibits excellent low-temperature stability.
It was found to have excellent cleaning power and less irritation to the skin.

The liquid cleaning composition of the present invention has the following excellent characteristics.

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

(2) It has excellent detergency and foaming power, and is gentle on the skin.

Claims (1)

[Scope of Claims] 1. A liquid detergent composition comprising the following three components (A), (B) and (C). (A) General formula (I) ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (However, in the formula, R_1CO is a saturated or unsaturated fatty acid residue having 10 to 20 carbon atoms, and R_2 and R_3 are methyl groups. , ethyl group or hydroxyethyl group) from 1.5 to 15% by weight of amidoamine oxide. (B) General formula (II) R_4O(CH_2CH_2O)_mSO_3M (I
I) (wherein R_4 is a linear or branched alkyl group having 9 to 15 carbon atoms, m is an integer of 2 to 7, M is a cationic residue of an alkali metal, alkaline earth metal, ammonium, or alkanolamine) 1.5 to 30% by weight of alkyl ether sulfate represented by (C) General formula (III) ▲Mathematical formula, chemical formula, table, etc.▼(III) 10 to 20 saturated or unsaturated fatty acid residues, n1 is an integer of 1 to 20, n
2 represents an integer of 0 to 20) 1.0 to 10% by weight of alkanolamide 2. The composition according to claim 1, wherein R_2 and R_3 of general formula (I) are each a methyl group. thing. 3. The composition according to claim 1, wherein M in general formula (II) is sodium.