JPS5837358B2 - liquid cleaning composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid detergent composition that is particularly useful as a kitchen detergent and a hair wash, and its purpose is to provide a cleaning agent that is mild to the skin and excellent against oil stains. The purpose of the present invention is to provide a transparent liquid detergent composition that exhibits foaming properties and good rinsability and low-temperature stability.

Sulfate ester type anionic active agents are currently widely used as active ingredients in kitchen detergents for dishes or vegetables, or as active ingredients in hair cleansers such as shampoos.

Although sulfate ester type anionic surfactants do not have poor foaming properties per se, they have the disadvantage that foaming properties are significantly reduced when a large amount of oil stains are present in the object to be cleaned. are doing.

For example, when washing dishes with oils and fats on them, or when washing hair with pomade, etc., the foaming properties of the sulfate ester type anionic activator may be lower than when washing items with less oil stains. becomes extremely worse.

Although the foaming ability and cleaning power of a cleaning agent are not necessarily in a proportional relationship, general consumers tend to judge that cleaning agents with poor foaming ability also have poor cleaning power.

Under these circumstances, research has been conducted to solve the problem of foaming properties of sulfate ester type anionic surfactants caused by oil stains by using amphoteric surfactants in combination, and some results have been achieved in improving foaming properties. It is contained.

However, the combination of an amphoteric surfactant and a sulfuric acid ester type anionic surfactant as proposed in the past cannot produce the liquid detergent intended by the present invention.

For example, U.S. Pat. No. 2,833,722 discloses a combination of an alanine-type amphoteric active agent, but this type of amphoteric active agent does not have very good compatibility with an anionic active agent. The formulation added to the agent has poor low temperature stability.

In addition, Japanese Patent Publication No. 45-18987 teaches that an alkyl betaine is incorporated into an anionic activator, and Japanese Patent Publication No. 45-28905 teaches that an ethoxylated alkyl betaine is incorporated into an anionic activator, but these formulations have poor rinsability. The disadvantage is that it is bad.

Furthermore, the above-mentioned Japanese Patent Publication No. 45-18987 introduces an example in which an imidazoline type amphoteric surfactant is used in combination, but this amphoteric surfactant cannot sufficiently improve the foaming properties of the anionic surfactant. Can not.

As described above, even with the prior art, the deterioration in foaming properties of sulfate ester type anionic surfactants can be improved by the combined use of certain amphoteric surfactants, and at the same time, the detergency can be improved to some extent.

However, depending on the type of amphoteric activator used, some have poor low-temperature stability and others have poor rinsability, so no product that has all the desirable properties as a liquid detergent has been developed. .

Therefore, the present invention provides a new liquid detergent composition that not only exhibits excellent cleaning and foaming properties against oil stains, but also has good rinsability and low-temperature stability, as well as being transparent and mild to the skin. It aims to provide the following, and its features are: Ri (C2H,0)n OSOsH (1,1
(However, R1 is a C9 to C16 linear or branched alkyl group, n = O to 5) An alkali metal salt, ammonium salt, or alkanolamine of a sulfuric acid ester type anionic activator represented by the above general formula [l] The salt (4) and the alkylamide amine type amphoteric surfactant (6) represented by the following general formula CII) were combined into a mixture of (4) and (6).
) in a molar ratio of 1/0.03 to 1/0.3.

? However, R2 is a C7-C21 linear or branched alkyl group, R3 and R4 are each a C2-C3 alkylene group, and M is H or an alkali metal.

) In the present invention, the number of carbon atoms in the alkyl group R of the anionic activator represented by the general formula (1) must be in the range of 9 to 15, and if it is less than 9, the foaming property is poor. insufficient, 16
If the amount exceeds 1, the rinsing properties and low temperature stability will be significantly deteriorated.

In addition, if the number of moles n of ethylene oxide added exceeds 5, the foaming properties and detergency will deteriorate even if an amphoteric activator of the general formula [■] is used in combination, so n should be set to 5 or less. preferable.

Next, regarding the amphoteric activator represented by general formula (n), the number of carbon atoms in the alkyl group R2 is in the range of 7 to 21 from the viewpoint of compatibility between the amphoteric activator and the anionic activator. It is preferable that it be within.

If we discuss the general tendency, when the alkyl group is branched, it has better compatibility with the anionic activator than when it is linear with the same number of carbon atoms.

The mixing ratio of the amphoteric activator of general formula (It) and the anionic activator of general formula [l] is 0.03 to 0.3 mol of the amphoteric activator per 1 mol of the anionic activator. However, if the molar ratio of the amphoteric activator to the anionic activator is less than 0.03, it is not possible to improve foaming properties caused by oil stains; If it exceeds 10%, the low temperature stability will deteriorate, which is not preferable.

The liquid detergent composition according to the present invention is required to contain an anionic active agent of general formula (1) and an amphoteric active agent of general formula [ll] in a specific ratio. Similarly to conventional liquid cleaning compositions, adjuvants such as solvents, solubilizers, thickeners, sequestrants, colorants, preservatives, fragrances, etc. can be added as necessary.

Incidentally, the solvents that can be used in the present invention include lower alcohols such as ethanol and lower glycols such as propylene glycol, and the solubilizers include lower alkylbenzenesulfonates such as p-toluenesulfonates, urea, etc. can be exemplified.

The amount of the active agent component to be incorporated into the composition depends on the amount of other additives, but up to about 50 wt% can be used without impairing performance.

As is clear from the above detailed description, the liquid detergent composition of the present invention uses a sulfate ester type anionic surfactant and an alkylamide amine type amphoteric surfactant in combination, so even if the object to be cleaned is severely oily. Even if the detergent composition is dirty, the foaming properties do not deteriorate, and therefore, there is an advantage that excessive use of the detergent composition is naturally suppressed.

In addition, since the liquid detergent composition of the present invention has good rinsability, the amount of water required for rinsing is about half that of conventional ones.
The effect of saving water resources can also be expected.

Furthermore, since the cleaning composition of the present invention has good compatibility between the anionic active agent component and the amphoteric active agent component, it not only has excellent low temperature stability but also is said to be mild to the skin. It has advantages.

Therefore, the liquid detergent composition of the present invention can be used in all fields, but is particularly suitable for use in kitchen detergents and hair washes.

Next, the configuration and effects of the present invention will be explained in more detail by showing examples.

Examples Activator components 30wt% Ethanol 7wt% Urea 3wt% Fragrance 0.2wt% Colorant Trace amount of water Balance A total of 15 types of liquid detergent compositions having the above compositions were prepared.

Table 1 shows the breakdown of the active agent used in each liquid cleaning composition.

Next, the performance of each liquid cleaning composition was evaluated using the following test methods using Samples A1 to 15.

The results are shown in Table 2.

Cleaning Power Test In a vat containing washing liquid with a capacity of 3 A, a concentration of 0.15%, and a liquid temperature of 25°C, the front surface of dishes (0.5 g, 71 pieces) contaminated with butter was rubbed 5 times and the back surface 3 times with a sponge. After washing, the presence or absence of residual oil on the dishes was examined by staining with oil red.

The evaluation was based on the number of dishes that could be cleaned with the same washing solution.

Foaming test: Evaluation was made by measuring the foam height (mm) of the washing liquid after washing five dishes with the same formulation as in the above detergency test.

In this test, a cylindrical vat with a diameter of 30 cIIL was used as a washing liquid container.

Rinseability Test After shaking 300 g of spinach 10 times in a washing solution with a capacity of 37, concentration 0.15%, and a liquid temperature of 25°C, the spinach was shaken and rinsed five times in 34 ml of distilled water. The test was repeated by changing the stored water until no bubbles were observed at all, and evaluation was made by the number of times the stored water was replaced.

Low-temperature stability test Place approximately 50 samples into a glass sample pin with a volume of approximately 100 ml.
The samples were placed in a thermostat at -5° C. for 7 days, and the presence or absence of any abnormality was observed.

Samples with no abnormalities were marked with a circle, and samples with turbidity or precipitation were marked with an x.

Skin mildness test An adult's hand was immersed in a washing liquid with a concentration of 1% and a temperature of 35°C for 1 minute and then dried for 1 minute, which was repeated 30 times per day. The child's skin was observed for rough skin for 3 consecutive days. .

This test was conducted on 10 adults by comparing the washing liquid of sample 1 with the washing liquid of other samples, and the skin roughness was evaluated as follows based on the rough skin caused by the washing liquid of sample A1. .

＋2・・・・・・・・・ Significantly less +1 ・・・・・・ Less O ・・・・・・ No difference 1 ・・・・・・ Terrible 1 ・・・・・・ Extremely worse, The numerical values in the table are the sum of the above scores for 10 adults.

Claims (1)

[Claims] 1 General formula Rl - (C2H40) n-0803H (wherein R1 is a C9 to C16 straight or branched alkyl group,
an alkali metal salt, ammonium salt or alkanolamine salt (4) of a sulfate ester type anionic activator represented by n = O~5)
(However, R2 is a C7-C21 linear or branched alkyl group, R3t R, is each a C2-C3 alkylene group, and M is H or an alkali metal.) 1. A liquid cleaning composition comprising (4) to (2) in a molar ratio of 1/0.03 to 1/0.3.