KR20250083342A - Cosmetic composition for cleaning skin having high-temperature stable and dense form, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a cosmetic composition for skin cleansing, which contains 0.05 to 5.0 wt% of a polymer, 5 to 45 wt% of a surfactant, and 10 to 50 wt% of a moisturizer, thereby improving high-temperature stability and at the same time improving bubble density. The composition contains various natural ingredients, thereby having excellent cleansing power and a stable, excellent feeling of use, and can be widely utilized as a satisfactory cleansing product.

Description

Cosmetic composition for cleansing skin having high-temperature stable and dense foam, and method for manufacturing the same {COSMETIC COMPOSITION FOR CLEANING SKIN HAVING HIGH-TEMPERATURE STABLE AND DENSE FORM, AND MANUFACTURING METHOD THEREOF}

The present invention relates to a skin cleansing cosmetic composition or a method for producing the same, and more specifically, to a cream-type weakly acidic skin cleansing cosmetic composition which improves high-temperature stability and exhibits dense foaming power by dispersing a polymer in a cream-type weakly acidic cleansing cosmetic composition which has poor stability and insufficient foaming density, and a method for producing the same.

Cleansing agents such as cleansing foams require excellent foam performance in terms of not only the cleansing power to clean dirty areas, but also the feeling of use, functionality, and psychological perspectives.

Most of the surfactants currently in use are petroleum-based surfactants made by extracting crude oil and going through several processes. These petroleum-based surfactants are known to cause environmental pollution and human safety problems. In other words, if absorbed into the skin, it can destroy the skin barrier and cause itching and dermatitis, and if exposed repeatedly for a long period of time, it can cause hair loss, allergies, atopy, and decreased immunity.

For this reason, among the numerous surfactants, surfactants widely used in cosmetics are used with greater consideration given to their safety, that is, their effect on the skin, rather than their price or surface chemical properties.

In addition, the so-called 'good consumption' that considers both skin and the environment is on the rise in the global cosmetics industry. This is because the number of consumers who are questioning whether the values pursued by a brand are correct, starting with the ingredients in the product, is increasing. In relation to this, according to a survey, 70% of female consumers in their 20s to 40s responded that they generally always check the ingredients when purchasing cosmetics.

Moreover, it is known that the criteria for consumers to choose cosmetics have recently diversified, and a large portion of this is the use of new textures. Various formulations of cleansers are also being developed to meet these consumer demands.

The first surfactant used in the cosmetics industry was soap. In other words, soap made by neutralizing tallow or vegetable oil with alkali was initially used mainly to wash the skin. However, soap has a strong alkaline pH of about 9-10, which can irritate delicate skin. In addition, most soaps contain little skin-moisturizing ingredients and are made only for clean cleansing power, so if used on dry skin, it can cause skin tightness or roughness.

As an alternative, a detergent with a slightly acidic pH has been developed. It can be said that the ingredients of a detergent are primarily determined by whether or not they irritate the skin, but in most detergents, the surfactant ability tends to decrease as the safety for the skin is secured, so in the end, when creating a desired formulation, the safety aspect must be considered within the scope of meeting the minimum conditions in terms of product stability.

In the case of weakly acidic cleansers made of powder surfactants, there is a problem that the properties become poor over time or that they melt and separate at high temperatures due to excessive content of high-grade alcohol, and it is not easy to improve the stability of the formulation by supplementing this.

In addition, as a technology related to amino acid detergents, a cleansing foam cosmetic composition containing an amino acid surfactant is disclosed in Korean Patent No. 10-2346369, but there is no disclosure regarding the improvement of foaming power and foam stability by including a polymer in the cleansing cosmetic composition, while also having high temperature stability.

Accordingly, the developers of the present invention have completed a weakly acidic, cream-type detergent composition that is stable when reduced at high temperatures and forms a high-density foam by using a price-competitive polymer in a detergent based on a powder surfactant to overcome the above limitations, while expressing a new texture.

Republic of Korea Patent No. 10-2346369

The present invention has been made to solve the above-described problems, and the purpose of the present invention is to provide a cream-type weakly acidic cleansing cosmetic composition which improves high-temperature stability by dispersing a polymer in a weakly acidic cleansing cosmetic composition, and at the same time, exhibits dense foaming power, and a method for producing the same.

In order to achieve the above purpose, the cosmetic composition for skin cleansing according to the present invention,

It is characterized by containing 0.05 to 5.0 wt% of a polymer, 5 to 45 wt% of a surfactant, and 10 to 50 wt% of a moisturizer, thereby improving high temperature stability and at the same time improving bubble density.

Here, the polymer comprises at least one selected from the group consisting of xanthan gum, polyquaternium-7, polyquaternium-10, polyquaternium-67, hydroxypropyl starch phosphate, and mixtures thereof.

In addition, the surfactant comprises at least one selected from the group consisting of sodium cocoyl isethionate, sodium cocoyl glycinate, sodium lauroyl glutamate, potassium cocoyl glycinate, sodium cocoyl glutamate, sodium methyl cocoyl taurate, and mixtures thereof.

Additionally, the moisturizer is made of glycerin.

In addition, the method for manufacturing a skin cleansing cosmetic composition according to the present invention,

Step 1: heating the surfactant and glycerin until they are completely dissolved, then stirring while maintaining the temperature; and

It is composed of a second step of adding a polymer to the stirred material of the first step, stirring for a predetermined time, and then cooling; and is characterized by improving high-temperature stability and increasing bubble density at the same time.

At this time, the heating temperature and maintenance temperature of the first stage are 75°C,

The cooling temperature of the second step is 35°C.

The cosmetic composition provided by the present invention exhibits an excellent effect of providing a cream-type weakly acidic skin cleansing cosmetic composition that improves high-temperature stability and exhibits dense foaming power by dispersing a polymer in a weakly acidic cleansing cosmetic composition.

In addition, it can be widely used as a satisfactory cleansing product because it contains various natural ingredients, has excellent cleansing power, and has a stable and excellent feeling of use.

Figure 1 shows the high-temperature stability of Examples 1 to 5 and Comparative Example 1 according to the present invention.
Figure 2 is a photograph of the high-temperature stability properties of Examples 1 to 5 and Comparative Example 1 according to the present invention.
Figure 3 shows images of bubbles of Examples 1 to 4 and Comparative Examples 1 to 3 according to the present invention, taken over time.
Figure 4 is a graph showing the initial and final bubble counts of Examples 1 to 4 and Comparative Examples 1 to 3 according to the present invention.
Figure 5 is a graph showing the initial and final average bubble radii of Examples 1 to 4 and Comparative Examples 1 to 3 according to the present invention.

Hereinafter, the cosmetic composition according to the present invention will be described in detail with reference to test examples and examples, but the present invention is not limited to these test examples and examples. These examples are provided to explain the present invention in more detail to a person having ordinary knowledge in the technical field to which the present invention belongs.

A cosmetic composition was prepared using the ingredients and content ratios shown in Table 1 below.

[Manufacturing example]

The mixture of surfactants and glycerin was heated to 75°C to completely dissolve them, then the polymer was slowly added while stirring using a disper mixer while maintaining the temperature at 75°C, stirred for 10 minutes, and then cooled to 35°C.

　 Ingredient name (weight%) Example 1 Comparative Example 1 Example 2 Example 3 Example 4 Example 5 1 Purified water (WATER) titration titration titration titration titration titration 2 Sodium cocoyl isethionate
(Sodium Cocoyl Isethionate) 0 0 0 0 0 0 3 Sodium Cocoyl Glycinate
(Sodium Cocoyl Glycinate) 20 20 20 20 20 20 4 Sodium Lauroyl Glutamate
(Sodium Lauroyl Glutamate) 10 10 10 10 10 10 5 Potassium Cocoyl Glycinate
(Sodium Cocoyl Glycinate) 0 0 0 0 0 0 6 Sodium Cocoyl Glutamate
(Sodium Cocoyl Glutamate) 5 5 5 5 5 5 7 Sodium methyl cocoyl taurate
(Sodium Methyl Cocoyl Taurate) 0 0 0 0 0 0 8 Glycerin 35 35 35 35 35 35 9 Polyquaternium-7 0 0 0 0 0 4 10 Polyquaternium-10 0.5 0 2 4 0 0 11 Polyquaternium-67 0 0 0 0 4 0 12 Xanthan Gum 0 0 0 0 0 0 13 Hydroxypropyl starch phosphate
(Hydroxypropyl Starch Phosphate) 0.5 0 0.5 0.5 0.5 0.5

<Experimental Example 1. High Temperature Stability>

Stability was determined by the extent to which the creamy texture was maintained at 4℃, 25℃, and 50℃. Stability at 4℃ was defined as low-temperature stability, stability at 25℃ as room-temperature stability, and stability at 50℃ as high-temperature stability. The temperature cycling test was performed three times, with one cycle being 4℃ to 44℃.

The composition was observed visually after 30 days, and the results are shown in Table 2.

division Example 1 Comparative Example 1 Example 2 Example 3 Example 4 Example 5 Low temperature stability ◎ ◎ ◎ ◎ ◎ ◎ Room temperature stability ◎ ◎ ◎ ◎ ○ ◎ High temperature stability ◎ X ◎ ◎ ◎ ◎ Cycling Test ◎ X ◎ ◎ ◎ ◎ hardness 54 49 81 158 230 123

As shown in Table 2 above, Examples 1 to 5 were all good in low-temperature stability, room-temperature stability, high-temperature stability, and Cycling Test.

On the other hand, Comparative Example 1, to which no polymer was applied, showed a phenomenon of layer separation at high temperature stability, which is shown in Figure 1.

In addition, as shown in Fig. 2, Comparative Example 1 had poorer properties than Examples 1 to 5.

<Experimental Example 2. Bubble Image Measurement>

Foam evaluation was performed using a dynamic foam analyzer (DFA-100, KRUSS) at 25°C for about 5 minutes. At this time, a solution (50 mL) diluted to 1% of Examples 1 to 5 and Comparative Example 1 was placed in a glass column at the bottom, and air was injected through the glass column at a rate of about 0.3 L/min for 20 seconds to generate foam in the solution. Thereafter, the air injection was stopped, and the light transmission intensity was measured over time to measure changes over time in the shape of the foam, the height of the foam in the container, etc., to evaluate the behavior of the bubbles.

Images of changes in the bubble shape over time in Examples 1 to 5 and Comparative Example 1 shown in Table 1 were taken and shown in Fig. 3.

As shown in Fig. 3, in Comparative Example 1, where no polymer was added, the bubble size increased over time, but in the sample to which the polymer was applied, the rate of change in bubble size was not large. As shown in the bubble force images of Examples 1 to 5, it was confirmed that as the polymer content increased, the bubble density also improved.

<Experimental Example 3. Number of Bubbles>

The number of bubbles generated in Examples 1 to 5 and Comparative Example 1 shown in Table 1 was photographed over time, and this is shown in Fig. 4.

As shown in Fig. 4, the initial bubble count of Comparative Example 1, which does not include a polymer, was 31.302 mm², which was lower than that of Examples 1 to 5, which included a polymer. After about 320 seconds, the bubble reduction rate was the largest in Comparative Example 1, at 72%, followed by Example 1, at 56%, Example 2, at 57%, Example 3, at 55%, Example 4, at 44%, and Example 5, at 71.56%.

Through this, it was confirmed that when the polymer was applied, the bubble retention ability was improved compared to when the polymer was not applied.

<Experimental Example 4. Maximum Foam Capacity>

A graph showing the average foam volume generated in Examples 1 to 5 and Comparative Example 1 shown in Table 1 over time is shown in Fig. 5.

As shown in FIG. 5, after about 320 seconds, the maximum foam capacity of Comparative Example 1 was 120.9 mL, while the maximum foam capacities of Examples 1 to 5 were 132.5, 139.6, 143.1, 147.8, and 134.8 mL, indicating that the polymer also affects foaming power.

This is because the foam becomes more stable because the polymer is adsorbed at the interface between the gas and the liquid, and the drainage of the liquid is prevented due to the steric repulsion effect and the entropic repulsion effect. Therefore, it was confirmed that the bubbles become richer as the polymer is added.

The embodiments of the present invention described above should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those with ordinary knowledge in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Accordingly, such improvements and changes will fall within the protection scope of the present invention as long as they are obvious to those with ordinary knowledge.

Claims (8)

A cosmetic composition for skin cleansing, characterized in that it contains 0.05 to 5.0 wt% of a polymer, 5 to 45 wt% of a surfactant, and 10 to 50 wt% of a moisturizer, thereby improving high temperature stability and improving bubble density.
In paragraph 1,
A cosmetic composition for cleansing the skin, characterized in that the polymer comprises at least one selected from the group consisting of xanthan gum, polyquaternium-7, polyquaternium-10, polyquaternium-67, hydroxypropyl starch phosphate, and mixtures thereof.
In paragraph 1,
A cosmetic composition for cleansing the skin, characterized in that the surfactant comprises at least one selected from the group consisting of sodium cocoyl isethionate, sodium cocoyl glycinate, sodium lauroyl glutamate, potassium cocoyl glycinate, sodium cocoyl glutamate, sodium methyl cocoyl taurate, and mixtures thereof.
In paragraph 1,
A cosmetic composition for skin cleansing, characterized in that the above-mentioned moisturizer is glycerin.
Step 1: heating the surfactant and glycerin until they are completely dissolved, then stirring while maintaining the temperature; and
A method for manufacturing a skin cleansing cosmetic composition, comprising: a second step of adding a polymer to the stirred material of the first step, stirring for a predetermined period of time, and then cooling; and characterized by improving high-temperature stability and increasing bubble density at the same time.
In paragraph 5,
The heating temperature and maintenance temperature of the first step above are 75°C,
A method for manufacturing a skin cleansing cosmetic composition, characterized in that the cooling temperature of the second step is 35°C.
In paragraph 5,
A method for producing a cosmetic composition for skin cleansing, characterized in that the polymer contains 0.05 to 5.0 wt% of the total weight of the cosmetic composition, the surfactant contains 5 to 45 wt% of the total weight of the cosmetic composition, and the moisturizer contains 10 to 50 wt% of the total weight of the cosmetic composition.
In paragraph 5,
The above polymer comprises at least one selected from the group consisting of xanthan gum, polyquaternium-7, polyquaternium-10, polyquaternium-67, hydroxypropyl starch phosphate and mixtures thereof.
The above surfactant comprises at least one selected from the group consisting of sodium cocoyl isethionate, sodium cocoyl glycinate, sodium lauroyl glutamate, potassium cocoyl glycinate, sodium cocoyl glutamate, sodium methyl cocoyl taurate, and mixtures thereof.
A method for producing a cosmetic composition for skin cleansing, characterized in that the above-mentioned moisturizer is glycerin.