KR20230172322A - Sunscreen cosmetic compositions in aerosol form - Google Patents

Abstract

The present invention relates to an aerosol-type sunscreen cosmetic composition with excellent foaming ability and excellent feeling of use. According to the present invention, an aerosol-type cosmetic composition containing a sunscreen emulsion and liquefied petroleum gas (LPG) as a propellant is used. A cosmetic composition for sunscreen is provided. The aerosol-type sunscreen cosmetic composition of the present invention creates a dense and abundant foam when used, has a long foam retention time, provides an excellent feeling of use, and has an excellent skin cooling effect, so it can be usefully used as a sunscreen.

Description

Cosmetic compositions for aerosol sunscreen {Sunscreen cosmetic compositions in aerosol form}

The present invention relates to an aerosol cosmetic composition for blocking ultraviolet rays, and more specifically, to an aerosol-type cosmetic composition for blocking ultraviolet rays that does not cause white clouding and has excellent feeling of use and excellent ultraviolet ray blocking function.

Ultraviolet rays are classified according to their wavelength into UVA (320 - 400 nm), UVB (290 - 320 nm), and UVC (200 - 290 nm). These ultraviolet rays can accelerate skin aging by damaging skin cells and tissues after being absorbed into human skin. UVB, which is shorter wavelength ultraviolet rays, is absorbed by the epidermis and causes oxidative damage to the components of the epidermis. On the other hand, unlike UVB, long-wavelength UVA can penetrate into the dermis of the skin. In the dermis, UVA directly cuts the chains of biopolymers such as collagen, elastin, hyaluronic acid, and glycosaminoglycan, which are components of the extracellular matrix (ECM), through a photochemical reaction that generates reactive oxygen species. Skin aging can be accelerated by destroying collagen or increasing the expression of matrix metalloproteases (MMPs).

In addition, reactive oxygen species induced by ultraviolet rays also participate in the melanin production process, causing pigmentation such as spots and freckles due to excessive melanin production. Accordingly, the use of sunscreens that can block/absorb ultraviolet rays is increasing. Sunscreens are divided into organic sunscreens and inorganic sunscreens.

Inorganic sunscreens, such as zinc oxide and titanium dioxide, protect the skin from ultraviolet rays by physically scattering ultraviolet rays. In contrast, organic sunscreen is a sunscreen that mainly consists of benzene-based organic chemicals such as oxybenzone and avobenzone, and these ingredients absorb ultraviolet rays and prevent them from penetrating the skin.

Inorganic sunscreens have the advantage of being highly safe for the skin, but have the disadvantage of causing a white cast phenomenon. In contrast, organic sunscreens have the problem of deteriorating the feeling of use, such as being heavy and shiny, and may cause contact allergic dermatitis.

Conventionally, sunscreens have been manufactured in the form of emulsions such as creams and lotions, or in the form of mousse or spray-type aerosols. Cream and lotion formulations are advantageous for using organic and inorganic sunscreens in combination, and have the advantage of excellent UV blocking effect, but they have the problem of feeling heavy or sticky and causing a white cast, while spray types have a light feeling when used. Despite this feature, there was a problem in that it did not contain a lot of sunscreen.

Mousse-type aerosol products have the advantage that the contents are sprayed in the form of a foam, so they can be easily spread not only on the face but also on a large area of skin, and they have a good feeling of use. However, it is difficult to create foam and the foam flows off easily, making it difficult to secure retention time. There was.

Accordingly, the present inventors tried to prepare an aerosol-type sunscreen cosmetic composition that forms a dense and abundant foam, maintains the foam for a long time, provides an excellent feeling of use, and has excellent ultraviolet ray blocking activity, and thus completed the present invention.

(0001) Republic of Korea Patent Registration No. 10-2394637 (2022.05.02.) (0002) Republic of Korea Patent Registration No. 10-1408631 (2014.06.10.) (0003) Republic of Korea Patent Registration No. 10-1684909 (2016.12.05.)

The purpose of the present invention is to provide an aerosol type cosmetic composition for sunscreen with excellent foaming ability and excellent feeling of use.

In order to achieve the above object, according to the present invention, an aerosol type sunscreen cosmetic composition is provided including a sunscreen emulsion and liquefied petroleum gas (LPG) as a propellant.

At this time, the sunscreen emulsion and liquefied petroleum gas (LPG) are characterized in that they are contained in a ratio of 80 to 85% by weight and 15 to 20% by weight, respectively.

The sunscreen emulsion is characterized by comprising an oil phase composed of a sunscreen and an emulsifier and an aqueous phase composed of a solvent, thickener, and skin conditioning ingredient. The sunscreen consists of butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine, homosalate, ethylhexyl salicylate, ethylhexyl methoxycinnamate, octocrylene, titanium dioxide and zinc oxide. It is characterized in that it is at least one selected from the group. The skin conditioning ingredient is characterized in that it is at least one selected from the group consisting of glycerin, ceramide, hyaluronic acid, peptide, and Korean thistle leaf extract.

The aerosol type cosmetic composition for sunscreen is characterized in that it is mousse type.

The aerosol-type sunscreen cosmetic composition of the present invention creates a dense and abundant foam when used, has a long foam retention time, provides an excellent feeling of use, and has an excellent skin cooling effect, so it can be usefully used as a sunscreen.

Figure 1 is a photograph showing the mousse foam test results of the aerosol sunscreen cosmetic compositions of Examples and Comparative Examples of the present invention.

Hereinafter, the present invention will be described in more detail.

According to the present invention, an aerosol type sunscreen cosmetic composition containing a sunscreen emulsion and liquefied petroleum gas (LPG) as a propellant is provided.

At this time, the sunscreen emulsion and liquefied petroleum gas (LPG) are contained in ratios of 80 to 85% by weight and 15 to 20% by weight, respectively. It is more preferable that the sunscreen emulsion and liquefied petroleum gas (LPG) are used in a ratio of 80:20% by weight, as they exhibit better foam generation ability and retention time.

The sunscreen emulsion includes an oil phase composed of a sunscreen and an emulsifier, and an aqueous phase comprised of a solvent, thickener, and skin conditioning ingredient.

The sunscreen is contained in a ratio of 20 to 40% by weight based on the total weight of the emulsion, and includes butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine, homosalate, ethylhexyl salicylate, and ethylhexyl. At least one selected from the group consisting of silmethoxycinnamate, octocrylene, titanium dioxide, and zinc oxide may be used.

Polysorbate may be used as the emulsifier, preferably polysorbate 20.

The skin conditioning ingredient is contained in an amount of 0.1 to 20% by weight based on the total weight of the emulsion, and at least one selected from the group consisting of glycerin, ceramide, hyaluronic acid, peptide, and Korean thistle leaf extract may be used.

According to one embodiment of the present invention, xanthan gum, acrylate/C10-30 alkyl acrylate crosspolymer, etc. may be used as the thickener, and water is preferably used as the solvent.

In addition to the above ingredients, the sunscreen emulsion may contain conventional cosmetics such as pH adjusters, thickeners, preservatives, pigments, and fragrances, as needed.

The sunscreen emulsion is manufactured according to a conventional manufacturing method. According to one embodiment of the present invention, the water phase and oil phase components are respectively dissolved and dispersed at 75°C. Next, the oil phase is slowly added to the water phase and stirred to prepare an oil-in-water (O/W) emulsion.

In the production of the aerosol cosmetic composition of the present invention, liquefied petroleum gas (LPG) is used as a propellant. According to one embodiment of the present invention, the LPG is used in a composition of 30 wt% and 70 wt% of propane (C3) and butane (C4), respectively.

The prepared sunscreen emulsion is placed in a pressure-resistant container, and a propellant is injected to prepare a mousse-type aerosol-type sunscreen cosmetic composition.

The aerosol-type sunscreen cosmetic composition prepared in this way had excellent mousse foam generation ability, maintained for a long time (Test Example 1), and had an excellent feeling of use (Test Example 2). In addition, it showed a skin cooling effect and was excellent at soothing the skin (Test Example 3), and also had an excellent UV blocking effect (Test Example 4).

[Example]

Hereinafter, the present invention will be described in more detail through examples and test examples.

Preparation Example 1: Preparation of sunscreen emulsion

A sunscreen emulsion was prepared according to the composition in Table 1 below.

The aqueous phase ingredients were placed in a stirring tank, heated to 75°C, homomixed to homogenize, and an aqueous phase stirring tank was prepared. The oil phase ingredients were placed in another stirring tank, heated to 75°C, and completely dissolved to prepare an oil phase stirring tank. The oil phase raw material mixture in the oil phase stirring tank was added to the prepared water phase stirring tank and uniformly emulsified for 5 minutes. After cooling the obtained emulsion to 45°C, other raw materials were added and uniformly dispersed for 3 minutes. After cooling the obtained result to 30°C, a milky white lotion-like (O/W) composition was obtained.

Raw material name 　Content (% by weight) Water Ingredients Purified water to 100 Disodium EDTA 0.020 glycerin 1.000 xanthan gum 0.100 Acrylate/C10-30 Alkyl Acrylate Crosspolymer 0.100 Niacinamide 2.000 Adenosine 0.040 Oily ingredients Butylmethoxydibenzoylmethane 3.000 Bis-Ethylhexyloxyphenolmethoxyphenyltriazine 3.000 homosalate 8.000 Ethylhexyl Salicylate 4.500 Ethylhexylmethoxycinnamate 7.400 octocrylene 2.000 Polysorbate 20 1.000 etc Tromethamine Appropriate amount Phenoxyethanol Appropriate amount Spices Appropriate amount

Examples, Comparative Examples 1 to 5: Preparation of aerosol cosmetic composition for sunscreen

An aerosol-type sunscreen cosmetic composition was prepared according to the composition in Table 2 below.

The sunscreen emulsion prepared above was placed in a pressure-resistant container, and LPG (C3:C4=30:70wt%) as a propellant was injected according to the composition in Table 2 below to prepare a mousse-type sunscreen cosmetic composition. As a comparative example, products manufactured using different ratios of LPG as a propellant and those manufactured using Dimethyl Ether as a propellant were used.

(weight%) Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 emulsion
(Production Example 1) 80 90 70 80 90 70 LPG 20 10 30 0 0 0 Dimethyl Ether 0 0 0 20 10 30

Test Example 1: Mousse Foam Test

The creation and retention time of mousse foam of the aerosol sunscreen cosmetic compositions of the above Examples and Comparative Examples were measured.

This study was conducted on three voluntarily recruited women with an average age of over 30 years. After the subject washed his face with the same face wash (Piontech Co., Ltd.) and rested in a constant temperature and humidity room (temperature: 22 ± 1°C, humidity: 40 ± 5%) for 30 minutes, the aerosol of Examples and Comparative Examples 1 to 5 An appropriate amount of the cosmetic composition for sunscreen was applied to the subject's left facial area. The formation of mousse foam was observed and the retention time of the mousse foam was measured, and the results are shown in Table 3 and Figure 1 below.

Whether mousse foam is formed Mousse foam holding time Example Creates dense and abundant foam simultaneously with pumping. 300 seconds Comparative Example 1 Forms a dense foam but flows like porridge. 300 seconds or more Comparative Example 2 Bubbles are created as soon as pumped and then burst immediately. 20 seconds Comparative Example 3 Bubbles are created as soon as pumped and then burst immediately. 10 seconds Comparative Example 4 Bubbles are created as soon as pumped and then burst immediately. 20 seconds Comparative Example 5 Bubbles are created as soon as pumped and then burst immediately. 5 seconds

As seen in Table 3 and Figure 1, the aerosol composition of the example has excellent foaming ability, and the functional ingredients showing useful effects maintain the mousse foam for a sufficient period of time to provide skin absorption and/or skin cooling effect. .

Test Example 2: Usability test

The feeling of use of the aerosol cosmetic compositions prepared in Examples 1 to 5 was evaluated. This test was conducted on 10 women aged 30 to 40 using the following method.

After washing the face and adjusting the skin texture using toner, the compositions of Examples and Comparative Examples 1 to 5 were applied in two pump amounts and applied to the entire face according to the skin texture and allowed to be absorbed. For the usability test, seven items of absorption, stickiness, moisture, spreadability, skin irritation, and overall satisfaction were evaluated. Each item was evaluated from a maximum of 5 to a minimum of 0 (items excluding skin irritation: the higher the score, the better the satisfaction; skin irritation: the lower the score, the lower the skin irritation).

The results are shown in Table 4 below.

Evaluation items Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 absorptivity 5.0 4.0 4.5 3.0 3.2 2.8 stickiness 4.9 3.5 4.0 3.1 2.8 3.2 Moist 4.9 4.0 3.0 2.5 2.8 2.5 Spreadability 5.0 3.0 3.0 2.4 2.5 2.4 Skin irritation 0.0 0.0 1.0 2.5 2.0 3.5 overall satisfaction 5.0 3.8 3.9 2.8 3.0 2.5

As confirmed in Table 4, compared to Comparative Examples 1 to 5, the aerosol composition of the example showed excellent absorption, moisture, and spreadability, less stickiness and less skin irritation, and excellent overall satisfaction.

Test Example 3: Skin cooling sensation test

In order to test the effect of the aerosol sunscreen cosmetic composition on skin temperature, the change in skin temperature when applying the aerosol sunscreen composition was measured using a skin infrared thermometer for one day using the following method.

This study was conducted on three voluntarily recruited women with an average age of over 30 years. After the subject washed his face with the same face wash (Piontech Co., Ltd.) and rested in a constant temperature and humidity room (temperature: 22 ± 1°C, humidity: 40 ± 5%) for 30 minutes, the aerosol of Examples and Comparative Examples 1 to 5 An appropriate amount of the composition was applied to the subject's left facial area.

Skin temperature was measured before and immediately after using the aerosol composition. Specifically, the skin temperature of the left facial area was measured from a distance of 2 to 3 cm using an infrared thermometer with a bare face. One minute after measuring the skin temperature of the bare face, the aerosol compositions of Examples and Comparative Examples 1 to 5 were evenly applied to the left facial area of the subject in a dose of 1 g, and after 10 seconds, the aerosol composition was applied at a distance of 2 to 3 cm using an infrared thermometer. The temperature of the application area on the left face was measured. The results are shown in Table 5 below.

Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Before application 34℃ 34℃ 34℃ 34℃ 34℃ 34℃ After application 30℃ 33℃ 24℃ 14℃ 20℃ 7℃ temperature change -4℃ -1℃ -10℃ -20℃ -14℃ -27℃

In Comparative Example 1, there was little change in skin temperature compared to before application, so a skin cooling effect could not be expected, and in Comparative Examples 2 to 5, it was confirmed that the skin temperature rapidly decreased by about 10°C or more compared to before application. On the other hand, in the example, the skin temperature decreased by about 4°C.

Lowering skin temperature is a fundamental skin care method that prevents phenomena such as loss of skin elasticity or sagging pores. This cosmetic product has a skin cooling effect and is very effective in soothing the skin and relieving inflammation in the skin by lowering the skin temperature. However, if the skin temperature drops too low, blood circulation and skin activity slows down, so it is not best to lower the skin temperature unconditionally. In light of the importance of an appropriate level of skin cooling effect, it can be confirmed that the composition of the example where the skin temperature is lowered by about 4°C can bring about the best effect on the skin.

Test Example 4: PA, SPF index measurement

A human application test was conducted to evaluate the UV protection index of the UV blocking composition prepared above.

The UVA protection grade (PA) indicates the degree of UVA blocking effect. A certain area of human skin is divided into two parts, and a certain amount of UV blocking composition is applied to one part, and no UV blocking composition is applied to one part. After irradiating a certain amount of ultraviolet rays at regular intervals to the area where the ultraviolet ray blocking composition has been applied and to the area where the composition has not been applied, the Minimum Persistent Pigment darkening Dose is the minimum amount of ultraviolet irradiation at which faint darkening is recognized in the entire irradiated area. , MPPD) is measured and compared to evaluate the degree of UV protection.

The sun protection factor (SPF) is an index indicating the blocking effect of a product that blocks UVB, and is calculated by dividing the minimum amount of erythema obtained by applying a sunscreen composition by the minimum amount of erythema obtained without applying a sunscreen composition. Minimum Erythema Dose (MED) refers to the minimum amount of UV radiation that can cause erythema to appear in the entire irradiated area within 16 to 24 hours after UVB is irradiated to human skin.

The specific test method was in accordance with the Ministry of Food and Drug Safety Notice No. 2021-55, ‘Method and Standard for Measurement of UV Blocking Effect’. A human application test was conducted on 10 test subjects with skin types II and III in accordance with the regulations on the screening of functional cosmetics in the Ministry of Food and Drug Safety Notice No. 2021-55 [Appendix 1] UV blocking effect measurement methods and standards. The results are shown in Table 6 below.

Example PA PA++++ SPF 51.014(50+)

Claims (6)

An aerosol-type sunscreen cosmetic composition containing a sunscreen emulsion and liquefied petroleum gas (LPG) as a propellant. The aerosol type sunscreen cosmetic composition according to claim 1, wherein the sunscreen emulsion and liquefied petroleum gas (LPG) are contained in a ratio of 80 to 85% by weight and 15 to 20% by weight, respectively. . The aerosol-type sunscreen cosmetic composition according to claim 1, wherein the sunscreen emulsion comprises an oil phase consisting of a sunscreen and an emulsifier and an aqueous phase consisting of a solvent, a thickener, and a skin conditioning ingredient. The method of claim 3, wherein the sunscreen is butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine, homosalate, ethylhexyl salicylate, ethylhexyl methoxycinnamate, octocrylene, titanium. An aerosol type cosmetic composition for sunscreen, characterized in that it is at least one selected from the group consisting of dioxide and zinc oxide. The aerosol type sunscreen cosmetic composition according to claim 3, wherein the skin conditioning ingredient is at least one selected from the group consisting of glycerin, ceramide, hyaluronic acid, peptide, and Korean thistle leaf extract. The aerosol type cosmetic composition for sunscreening according to claim 1, wherein the aerosol type cosmetic composition for sunscreening is in a mousse type.