KR102408279B1 - Stability-improved clay-containing cosmetic composition with water-insoluble cellulose - Google Patents

Abstract

The present invention relates to a cosmetic composition, and more particularly, to a cosmetic composition comprising a clay component having improved formulation stability. Since the cosmetic composition according to the present invention has excellent formulation stability, the formulation can be stably maintained even at low and high temperatures, and exhibits the effect of exhibiting a superior feeling of use while maintaining the inherent rough and crude texture of the clay component.

Description

{Stability-improved clay-containing cosmetic composition with water-insoluble cellulose}

The present invention relates to a cosmetic composition, and more particularly, to a cosmetic composition comprising a clay component having improved formulation stability.

Cosmetics containing clay ingredients claim the sebum control and soothing effects of clay ingredients, and are widely applied to packs, creams, or cleansing products. In line with the natural and eco-friendly trend, which is the general trend of the recent society, cosmetics are also being released in which the content or texture of the formulation is naturally manufactured. Cosmetics containing clay ingredients have a unique rough texture and crude feel, and most clay formulations have a visually differentiated appearance from general creams.

Clay component is a generic term for mineral fine particles, and in general, mineral fine particles have a high specific gravity and are difficult to disperse. In general, for the even dispersion of the clay component, in addition to the polymer, wax or fatty alcohol is used to maintain stable viscosity and hardness. Even within the formulation, the stability over time is not good, and in particular, compatibility with conventional cosmetic raw materials such as oil or polyol is not good. Therefore, the sweating phenomenon in which oil, polyol, or traumatic water is separated or cut off at low and high temperatures is prominent, which deteriorates the quality of the clay formulation and causes poor stability.

In order to solve the above problem, there is a method of reducing the content of the clay component or increasing the viscosity and hardness of the formulation, but this method is not preferable. When the content of the clay component is reduced, the efficacy and effect of the product do not meet expectations, and when the viscosity and hardness increase, the feeling of use decreases due to the increase in the viscosity and hardness. In particular, when using a polymer to increase viscosity and hardness, it is difficult to differentiate it from general emulsified cosmetics by offsetting the unique texture of the clay component.

As described above, many studies have been conducted to improve the stability of the clay component-containing formulation, but there is no progress.

The problem to be solved by the present invention is to provide a cosmetic composition comprising a clay component with improved formulation stability.

In order to solve the above problems, the present invention provides a cosmetic composition comprising a clay component, which further comprises water-insoluble cellulose.

The present inventors have been conducting research to solve the problem that it is difficult to secure formulation stability in the case of a cosmetic composition containing a conventional clay component. When water-insoluble cellulose is further included in a cosmetic composition containing a clay component, It was confirmed that formulation stability was maintained, and it was confirmed that the texture of the clay component was maintained and the feeling of use was also significantly excellent when applied to actual skin, thereby completing the present invention.

As used herein, the term "clay" is not limited thereto, but collectively refers to mineral particulates including all of mud, mud, loess, clay, sediment, mud, mud (bee or pearl), and the like. is a term that For example, gasul, which is clay made by metamorphism through volcanic activity, and stone charcoal (volcanic cluster), which is a volcanic stone that is burnt by high heat of clay during a volcanic eruption, are also included.

In the present invention, the clay component is not limited thereto, but for example, montmorillonite, disteadimonium hectorite, quaternium-18 hectorite, bentonite, potassium bentonite, calcium bentonite, sodium bentonite, hectorite, illite, kaolinite, kaolin, smectite, dictite, pyrophyllite, Saponite, nontronite, nacrite, halloysite, endillite, chrysotile, aamesite, beidellite ), saponite, sauconite, glauconite, chlorite, vermiculite, attapulgite, sepiolite, allophane (allophane), imogolite, montmorillonite-smectite, titanium oxide, titanium dioxide, or a mixture of two or more thereof.

The average particle diameter (D50) of the clay component may be 0.0001 to 100 μm, preferably 0.001 to 50 μm.

As used herein, the term “average particle diameter (D50)” refers to the diameter (diameter) of particles whose cumulative volume corresponds to 50% by volume in the particle size distribution.

In the present invention, the clay component is a set of amorphous particles that do not have a specific shape, and in the present specification, numerous clay components having different sizes are shown as average particle diameters.

As used herein, the term “average particle size” refers to a particle size measured using a laser particle size analyzer. For reference, when the particle size distribution is measured, the particle diameter is an imaginary equivalent diameter. When one of the physical properties of a measured particle is similar to that of a fuselage sphere having a specific diameter, this diameter is called the equivalent diameter of the measured particle. The laser particle size analyzer uses the scattering properties to create an equivalent contrast, and the measured diameter is the equivalent scattering diameter. That is, the diameter of the body sphere having the same scattering characteristics as the measured diameter is used to represent the actual particle size.

In the present invention, the clay component may be included in an amount of 0.1 to 50% by weight, preferably 1 to 30% by weight, based on the total weight of the cosmetic composition. When the clay component is included in less than 0.1% by weight relative to the total weight of the cosmetic composition, there is no problem of formulation stability, but it is difficult to commercialize it because the sebum control and soothing effects of the clay component are not sufficient, and when it contains more than 50% by weight Formulation stability is unstable, and viscosity and hardness are too high, which may cause problems in usability and usability.

In addition, the cosmetic composition according to the present invention further includes water-insoluble cellulose in the cosmetic composition including the clay component.

In the present invention, the water-insoluble cellulose refers to a cellulose aggregate that does not dissolve in water. The term "insoluble" is a term that includes not only all insoluble but also partially dissolved, for example, 10% by weight, 9% by weight, 8% by weight, 7% by weight, based on the total weight of water-insoluble cellulose, 6 wt%, 5 wt%, 4 wt%, 3 wt%, 2 wt%, 1 wt% or less of water-insoluble cellulose is dissolved in water.

In addition, the water-insoluble cellulose is a term that includes both water-insoluble cellulose and water-insoluble cellulose derivatives. The water-insoluble cellulose derivative is, but is not limited thereto, for example, cellulose, cellulose powder, microcrystalline cellulose, ethyl cellulose, methyl cellulose, nitrocellulose, cellulose acetate, cellulose gum, hydroxyethyl cellulose, hydroxyethyl ethyl cellulose, rayon, and the like.

In the present invention, the water-insoluble cellulose may be crystalline cellulose from which amorphous cellulose is removed. The crystalline cellulose includes, but is not limited to, for example, microcrystalline cellulose and the like. Accordingly, the water-insoluble cellulose is characterized in that substantially no amorphous cellulose is included, and in the present specification, the term "substantially not included" is a term that includes not only nothing but also a small portion. For example, 10 wt%, 9 wt%, 8 wt%, 7 wt%, 6 wt%, 5 wt%, 4 wt%, 3 wt%, 2 wt%, 1 Including those included in weight % or less.

The water-insoluble cellulose included in the cosmetic composition according to the present invention may be added in the form of an aggregate of amorphous particles that do not have a specific shape, and the average particle diameter (D50) of the numerous water-insoluble celluloses of different sizes is It may be 1 to 500 μm. The present inventors tested the formulation stability of a cosmetic composition containing a clay component added with crystalline cellulose having an average particle diameter of 20 and 100 μm, and confirmed that formulation stability was improved at various temperatures.

In the present invention, the water-insoluble cellulose may be included in an amount of 0.01 to 10% by weight, preferably 0.1 to 5% by weight, based on the total weight of the cosmetic composition.

In the cosmetic composition according to the present invention, the weight ratio of the clay component to the water-insoluble cellulose may be 0.1-50:1 (clay component: water-insoluble cellulose), preferably 1-30:1. More preferably, it may be 1-20:1, 10-20:1, 10-16:1. When the weight ratio of the clay component and the water-insoluble cellulose is 0.1-50:1, it is excellent in terms of formulation stability of the cosmetic composition.

The cosmetic composition according to the present invention is characterized in that formulation stability is improved by further including water-insoluble cellulose in the cosmetic composition comprising a clay component, and in particular, formulation stability is improved in various temperatures. In addition, the formulation stability is improved, and the texture of the clay component is maintained and the feeling of use is improved.

That is, in the present invention, the water-insoluble cellulose may be used for i) improving the stability of the clay component, ii) maintaining the texture of the clay component, and/or iii) improving the feeling of use of the cosmetic composition.

In order to confirm this, the present inventors prepared the cosmetic composition according to the present invention under temperature conditions of 50 °C, 45 °C, 40 °C, and 4 °C, conditions for changing the temperature with a certain period at a temperature in the range of -15 °C to 45 °C, and Improved formulation stability was confirmed in both freezing and thawing conditions at sub-zero temperatures, and it was experimentally confirmed that not only formulation stability but also the texture of the clay component was maintained and excellent feeling of use was obtained.

In the preparation of the cosmetic composition according to the present invention, in addition to the above components, ingredients such as moisturizers, additives, excipients, emulsifiers, stabilizers, dispersants, viscosity modifiers, antioxidants, oils, fragrances, and moisture used in conventional cosmetics A person skilled in the art may appropriately select and add in a range that does not impair the effects of the invention.

In addition, the cosmetic composition according to the present invention can be prepared in various formulations, but is not limited thereto, for example, wash-off pack, peel-off pack, sheet mask pack, cleansing cream, cleansing lotion, cleansing gel, cleansing It is prepared in a formulation selected from the group consisting of foam, massage cream, and body cleanser, and can be used in various cosmetic formulations.

Since the cosmetic composition according to the present invention has excellent formulation stability, the formulation can be stably maintained even at low and high temperatures, and exhibits the effect of exhibiting a superior feeling of use while maintaining the inherent rough and crude texture of the clay component.

Hereinafter, examples and the like will be described in detail to help the understanding of the present invention. However, the embodiments according to the present invention may be modified in various other forms, and the scope of the present invention should not be construed as being limited to the following examples. The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art.

Preparation of Examples and Comparative Examples

The present inventors prepared the compositions of Examples 1 and 2 and Comparative Examples 1 and 2 by mixing the raw materials as shown in Table 1 below. In more detail, after heating the aqueous phase component and the oil phase component to 80°C, respectively, insoluble cellulose was slowly mixed with the aqueous phase component. After that, the composition of Examples 1 and 2 and Comparative Examples 1 and 2 was prepared by slowly adding the oil phase component to the aqueous phase component.

ingredient Example One Example 2 comparative example One comparative example 2 Purified water Up to 100 Up to 100 Up to 100 Up to 100 bentonite(1) 5 5 5 5 Kaolin(2) 10 10 10 10 glycerin 10 10 10 10 1,3-butylene glycol 5 5 5 5 Titanium Dioxide (3) One One One One EDTA 3Na 0.02 0.02 0.02 0.02 panthenol One One One One Glyceryl Stearate One One One One Caprylic/Capric Triglycerides 3 3 3 3 C14-22 alcohol One One One One C12-20 alkyl glucoside One One One One antiseptic appropriate amount appropriate amount appropriate amount appropriate amount incense appropriate amount appropriate amount appropriate amount appropriate amount carnauba wax One One 3 One Stearic Acid 8 8 10 8 behenyl alcohol 3 3 4 3 Crystalline Cellulose 1 (4) One - - - Crystalline Cellulose 2(5) - One - -

⁽¹⁾ ELEMENTIS brand name BENTONE with an average particle diameter of 0.8 μm

⁽²⁾ Brand name COLLOIDAL KAOLIN 2457 by BRENNTAG with an average particle diameter of 0.6 μm

⁽³⁾ Trade name TIO2 3328 by BRENNTAG with an average particle diameter of 0.3 μm

⁽⁴⁾ JRS Corporation's trade name VITACEL CS 20FC with an average particle diameter of 20 µm

⁽⁵⁾ JRS Corporation's trade name VITACEL CS 150F with an average particle diameter of 100 µm

The present inventors performed the following formulation stability evaluation experiment using the compositions of Examples 1-2 and Comparative Examples 1-2.

Experimental Example 1. Formulation stability evaluation

In order to evaluate the formulation stability of Examples 1-2 and Comparative Examples 1-2, aging conditions according to temperature were evaluated. Accelerated evaluation over time was performed for 4 weeks after preparation at a temperature condition of 50° C./45° C./40° C./Cycle/4° C./FT. The above conditions are accelerated evaluation conditions over time to see the formulation stability of conventional cosmetics, and the cycle condition means to change with a certain cycle from -15°C to 45°C. The FT condition refers to freeze-thaw.

Example One Example 2 comparative example One comparative example 2 50℃ O O X X 45℃ O O O X 40℃ O O O O Cycle O O O X 4℃ O O O X FT O O X X room temperature stability O O O O room temperature feeling Good Good
Crude texture Bad
stiff Good

[Assessment Methods]

O: good

X : Liquid leaks out (separated)

As a result, as shown in Table 2, it can be confirmed that Examples 1 and 2 including crystalline cellulose have improved stability under all temperature-dependent aging conditions of high temperature and low temperature and cycle conditions than Comparative Examples 1 and 2. Comparative Example 1, in which the viscosity was increased with wax and fatty alcohol, had better stability than Comparative Example 2, but it was confirmed that the stability was unstable at high temperature and FT. In particular, it was observed that the applicability deteriorated due to the increase in hardness, making it inconvenient to use.

Therefore, it was confirmed that the cosmetic composition including the clay component had excellent formulation stability when it further contained insoluble cellulose.

Claims (11)

A cosmetic composition comprising a clay component, comprising:
Further comprising water-insoluble cellulose,
The content of water-insoluble cellulose is 1 to 5% by weight based on the total weight of the cosmetic composition,
The weight ratio of the clay component and the water-insoluble cellulose is 10-20:1,
The clay component includes bentonite, kaolin, or titanium dioxide, and their average particle diameter (D50) is 0.0001 to 100 μm,
The water-insoluble cellulose is crystalline cellulose, and the average particle diameter (D50) of the water-insoluble cellulose is 1 to 500 µm. delete delete delete delete delete delete delete delete The cosmetic composition according to claim 1, wherein the water-insoluble cellulose is used for i) improving the stability of the clay component, ii) maintaining the texture of the clay component, or iii) improving the feeling of use of the cosmetic composition. According to claim 1, wherein the cosmetic composition is prepared in a formulation selected from the group consisting of wash-off pack, peel-off pack, sheet mask pack, cleansing cream, cleansing lotion, cleansing gel, cleansing foam, massage cream and body cleanser. A cosmetic composition, characterized in that