KR101776175B1 - Sunscreen cosmetic composition having excellent durability - Google Patents

Abstract

More particularly, the present invention relates to a cosmetic composition for protecting ultraviolet rays with excellent persistence, and more particularly, to a cosmetic composition for cosmetics containing ultraviolet shielding which is lightweight and contains an inorganic material such as silica and an inorganic ultraviolet screening agent on the water surface including polymethylsilsesquioxane, The present invention relates to a cosmetic composition for ultraviolet ray shielding which exhibits a pleasant feeling of use and is excellent in durability and does not appear after application of the skin.

Description

[0001] Sunscreen cosmetic composition having excellent durability [0002]

More particularly, the present invention relates to a cosmetic composition for protecting ultraviolet rays with excellent persistence, and more particularly, to a cosmetic composition for cosmetics containing ultraviolet shielding which is lightweight and contains an inorganic material such as silica and an inorganic ultraviolet screening agent on the water surface including polymethylsilsesquioxane, The present invention relates to a cosmetic composition for ultraviolet ray shielding which exhibits a pleasant feeling of use and is excellent in durability and does not appear after application of the skin.

UV rays penetrate deeply into the skin with invisible rays that damage the dermis and cause burns and skin, as well as wrinkles and aging. Ultraviolet rays are classified into UV-C of 240-290 nm wavelength, UV-B of 290-320 nm wavelength and UV-A of 320-400 nm wavelength depending on the wavelength. UVA, UVB and UVC, among which UVA (UVA) accounts for most of the ultraviolet radiation reaching the earth. UVA (UVA) penetrates the skin's dermis and promotes skin cancer, wrinkles and melanin formation, leading to skin aging and skin irritation. Ultraviolet B (UVB) is penetrated to the epidermis of the skin when exposed to a short period of time, resulting in erythema, freckles and edema.

As these risks have been known and outdoor activities have increased, public interest in UV protection products has increased, and various sun protection factor (SPF) and protection grade of UVA, PA ) Have been released.

Formulations of ultraviolet screening products are classified into water in oil (W / O) and water in water (O / W). The underwater type is a hydrophilic type and has a light, moist and soft feeling, which is favored by customers, but has a disadvantage that makeup persistence and water resistance are poor. Oil-in-water type (W / O), which is lipophilic type, is excellent in water resistance, but is not good in skin feel and spreadability and spreadability such as stickiness and oiliness. In addition, if you go out after wearing sunscreen, you may get contact with other people, friction between the sunscreen applied to the skin and the clothes you wear, sweat caused by strong sunlight and increased body temperature caused by external activities, It is often said that the ultraviolet ray shielding function is not performed because the ultraviolet ray shielding components to be applied to the skin due to the watering at the riverside and the like are blocked. This means that the product may be deposited or transferred to clothing, skin, or the like if it is exposed to excessive amounts of product in order to prevent it from being washed away.

In the external activity, there is a continuing need for an ultraviolet screening product that protects the skin from ultraviolet rays while at the same time not being buried or hardly buried, because the ultraviolet screening ingredients are evenly applied to the skin by various external factors.

The inventors of the present invention have conducted intensive studies for the production of a cosmetic composition for protecting ultraviolet rays which is excellent in durability and does not appear on the skin. As a result, the present inventors have found that when polymethylsilsesquioxane is dispersed and contained in the inner aqueous phase, The present inventors have found that when containing a blocking agent, they have a feeling of lightness and freshness, and at the same time, are excellent in durability and are not buried after they are applied to skin.

Accordingly, an object of the present invention is to provide a cosmetic composition for ultraviolet ray shielding which is characterized by being excellent in durability and not being stained, while providing a feeling of lightness and refreshing feeling.

In order to achieve the above object, in the present invention,

An aqueous phase comprising polymethylsilsesquioxane, and

And an oil phase part comprising silica and an inorganic UV blocking agent on the water receiving part.

The ultraviolet screening cosmetic composition of the present invention protects the skin from ultraviolet rays by uniformly applying the ultraviolet screening ingredients to the skin, exhibits a feeling of lightness and freshness, and is excellent in durability and is not buried.

The present invention provides an ultraviolet screening cosmetic composition comprising an aqueous phase containing polymethylsilsesquioxane and an oil phase comprising silica and an inorganic ultraviolet screening agent on the aqueous phase.

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

Polymethylsilsesquioxane contained in water as an internal phase in the cosmetic composition for protecting ultraviolet rays of the present invention is a silicone-based spherical powder having an average particle size of 200 nm or less and has lipophilic surface physical properties. In the present invention, the lipophilic polymethylsilsesquioxane, which is a silicone-based powder, strongly fixes the ultraviolet ray blocking components to the skin and prevents the ultraviolet ray blocking component from being easily washed out by various external friction, do.

The polymethylsilsesquioxane of the present invention is contained in an amount of 0.1 to 4.0% by weight, more preferably 0.4 to 3.0% by weight, based on the total weight of the composition. When the content of the polymethylsilsesquioxane is less than 0.4% by weight, a stable water-in-oil type UV-blocking emulsion formulation can not be formed due to lack of lipophilicity of polymethylsilsesquioxane. When the content of the polymethylsilsesquioxane exceeds 4.0% by weight, Formation into a water-in-oil type composition in a male type composition can occur.

The polymethylsilsesquioxane of the present invention is dispersed in at least one selected from the group consisting of glycerin, propylene glycol and butylene glycol before being contained in the water. As a result, polymethylsilsesquioxane, which is an oleophilic spherical powder, can be easily dispersed in water, which is the inner phase. When polymethylsilsesquioxane is dispersed in a dispersion solvent, it is preferable that polymethylsilsesquioxane is mixed in an amount of 50.0 wt% or less, more preferably 40.0 wt% or less, based on the total weight of the dispersion solvent. When the amount is more than 50.0% by weight, a flocculation phenomenon of polymethylsilsesquioxane occurs and the particles are not uniformly dispersed in the dispersion solvent.

In the cosmetic composition for protecting ultraviolet rays according to the present invention, the silica contained in the external phase oil phase is a spherical powder having a particle size of 100 nm or less and is a silica with a hydroxy group and a silanol group and enhances a feeling of lightness and refreshing feeling so as to improve stickiness and abrasion due to a UV- It plays a role.

The silica of the present invention is contained in an amount of 0.01 to 5.0% by weight, more preferably 0.4 to 4.0% by weight based on the total weight of the composition. When the content of the silica is more than 5.0% by weight, a stable composition can not be obtained because the migration of silica to the interface is difficult due to the gelation phenomenon between the silica. When the content is less than 0.01% by weight, It is not possible to form an emulsion formulation for sun-blocking ultraviolet rays.

As the inorganic ultraviolet screening agent contained in the oily portion of the cosmetic composition for protecting ultraviolet rays of the present invention, at least one selected from the group consisting of titanium dioxide, zinc oxide, silicate and talc may be used. Preferably, titanium dioxide and zinc oxide are used do.

The inorganic ultraviolet screening agent used in the present invention is contained in an amount of 0.1 to 15.0% by weight, more preferably 2.0 to 10.0% by weight, based on the total weight of the composition. If the content of titanium dioxide is less than 0.1% by weight, a stable water-in-oil type composition can not be obtained due to a lack of flocculation phenomenon at the interface. If the content of titanium dioxide is more than 15.0% by weight, Not only can it feel stiff when applied, but it also affects the stability of the formulation and can not be maintained for a long period of time.

In addition, the cosmetic composition for protecting ultraviolet rays of the present invention may further comprise an organic sunscreen agent in the oily phase.

Examples of the organic ultraviolet screening agents usable in the present invention include cinnamate derivatives such as octyl methoxycinnamate, isoamyl-p-methoxycinnamate, Salicylic acid derivatives such as butylmethoxy dibenzoylmethane, bis-ethylhexyloxylphenolmethoxy phenyl triazine and octyl salicylate, PABA (p-aminobenzoic acid) derivatives, benzo Benzophenones, anthranilates, and the like.

The ultraviolet shielding component may be used by controlling its content according to a desired ultraviolet shielding effect. In the present invention, the ultraviolet shielding ingredient is suitably used in combination with a target of SPF 50 and PA index +++.

In the present invention, in order to prepare a cosmetic composition for protecting against UV rays which is light and refreshing and having excellent durability of use feeling, polymethylsilsesquioxane is pre-dispersed in water with a dispersing solvent such as butylene glycol, and silica and an inorganic UV- And is contained in the oil phase part. That is, the cosmetic composition for UV protection of the present invention can be obtained by mixing silica and an inorganic UV-blocking agent in an oil-in-water portion and uniformly mixing it with an aqueous solution containing polymethylsilsesquioxane.

Hereinafter, the present invention will be described in more detail with reference to examples and test examples. It is to be understood, however, that the following examples and test examples are provided for illustrative purposes only for the understanding of the present invention, and the scope and scope of the present invention are not limited thereto.

[Example 1 and Comparative Examples 1 to 4]

Example 1 and Comparative Examples 1 to 4 were prepared according to the composition shown in Table 1 below (unit: wt%).

division Raw material name Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Floating
One Dicaprylyl carbonate 5 5 5 5 5 Ethyl hexylmethoxycinnamate 7 7 7 7 7 Isoamyl para methoxy cinnamate 2 2 2 2 2 Ethylhexyl salicylate 4 4 4 4 4 Bisethylhexyloxyphenol methoxyphenyltriazine 3 3 3 3 3 Top part 2 Dimethicone 8 8 8 8 8 Cyclomethicone 10 10 10 10 10 Cyclomethicone / dimethicone crosspolymer 5 5 5 5 5 Nylon powder 2 2 2 2 2 Silica One - - One One C12-C15 alkyl benzoate / titanium dioxide / aluminum stearate / polyhydroxy acid / alumina (3.0 wt% based on total weight as titanium dioxide) 7 - 7 7 - Zinc oxide / Cyclopentasiloxane / Phage-9 Polydimethylsiloxyethyl dimethicone / Hydrogen dimethicone (8.0 wt% based on the total weight of zinc oxide) 20 - 20 20 - Polymethylmethacrylate / titanium dioxide / zinc oxide (titanium dioxide, 0.05 weight% based on the total weight of zinc oxide) 0.1 - 0.1 0.1 - Water top Disodium iodide 0.02 0.02 0.02 0.02 0.02 Polymethylsilsesquioxane 2 - 2 - 2 Butylene glycol 5 5 5 5 5 glycerin 5 5 5 5 5 Sodium chloride 0.5 0.5 0.5 0.5 0.5 antiseptic 0.3 0.3 0.3 0.3 0.3 Alcohol 3 3 3 3 3 Purified water Balance Balance Balance Balance Balance

<Manufacturing Method of Example 1 and Comparative Examples 1 to 4>

1) The oil phase 2 is heated to 75 to 80 DEG C to uniformly disperse and dissolve the oil phase 2, and uniformly mixed with the oil phase 1 at normal temperature.

2) All of the water phase parts are mixed, and polymethylsilsesquioxane is preliminarily dispersed in butylene glycol.

3) The solution of 2) is slowly added to the solution of the above 1) and dispersed with a homogenizer to prepare cosmetic composition for ultraviolet ray shielding.

[Test Example 1] Sensory evaluation for lightness and freshness

In order to evaluate the feeling of use in Example 1 and Comparative Examples 1 to 4, a sensory test was conducted on the cosmetic composition for ultraviolet shielding prepared in Example 1 and Comparative Examples 1 to 4.

Twenty women aged 25 to 35 were applied to the skin of the back of each person according to the general usage method, and then the average satisfaction degree of lightness and freshness was evaluated. The sensory evaluation was carried out according to the blotting law standards of excellent (5 points), excellent (3 points), normal (0), poor (-3 points) and very poor (-5 points) The results are shown in Table 2 below.

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Light, fresh feeling 4.1 3.7 2.8 2.4 4.3

As can be seen from the above Table 2, the cosmetic composition for in-water type ultraviolet shielding according to the present invention (Example 1) contains silica in the upper part and polymethylsilsesquioxane in the upper part of the water, And the satisfaction level was high in items about lightness and feeling of fresh feeling.

On the other hand, Comparative Example 1 and Comparative Example 4 did not contain an inorganic UV-blocking component, so that they were satisfied with the feeling of use because they did not feel tacky or rubbed by the inorganic UV-blocking component. However, Not satisfied. In Comparative Examples 2 and 3, it was confirmed that silica and polymethylsilsesquioxane, which are spherical powders which serve to reduce tackiness caused by the ultraviolet shielding raw material, are not contained at the same time, so that satisfaction with a light and pleasant feeling is low.

[Test Example 2] Bleaching and persistence evaluation

The properties and persistence of the compositions prepared in Example 1 and Comparative Examples 1 to 4 were evaluated.

First, 0.05 g of the above test substance was applied to a width of 50 cm ^{2 on} the surface of the foil in order to evaluate the non-fouling property, and the composition was allowed to stand for 10 minutes and dried. The strip of polyester fabric was then contacted with a full-bodied, processed using a machine, to effect vertical movement. After the fabric was held in tension, friction of the fabric occurred on the move. Around 10 times of friction was performed. The pigmented traces deposited on the fabric were divided into five grades and evaluated. The results are shown in Table 3 below.

<Evaluation Criteria for Uncharacteristic Properties>

1 level: very rough, 2 grade: rough, 3 grade: a little rough, 4 grade: almost no stain, 5 grade: no stain

Next, sensory evaluation was carried out to examine persistence. The panels were placed in a constant temperature and humidity room (25 ° C, 70% relative humidity) for about 15 minutes, and the cosmetic compositions were divided into four parts in the arms of the panels, ) And allowed to stand for about 15 minutes. Subsequently, saline solution at 35 캜 was flown thereon for 30 minutes, and color change before and after application was evaluated. The color change was evaluated by sensory evaluation on a 5-point scale, and the average value was obtained. The results are shown in Table 3 below.

<Evaluation Criteria for Persistence>

5 points: Very yes, 4 points: Yes, 3 points: Average, 2 points: Not so, 1 point: Not so much

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Not buried 4.4 4.6 2.9 2.4 4.5 Persistence 4.2 1.2 3.1 2.1 1.6

As can be seen from the above Table 3, it was confirmed that the cosmetic composition for in-water type UV blocking (Example 1) according to the present invention is excellent in both characteristics and durability that do not remain on the fabric. This is because the silicone-based polymethylsilsesquioxane, which is a silicone-based powder, strongly fixes the ultraviolet ray blocking components on the skin and can not easily be washed away by various friction of the external side, so that the ultraviolet ray blocking ability can be maintained. This is because it plays a role of not giving birth.

On the other hand, Comparative Examples 1 and 4 showed a high score in the case where zinc oxide and titanium dioxide, which are inorganic UV blocking ingredients, stained on fabrics were not contained, and Comparative Example 2 showed a high score in the case where no organic UV- Oxane, the scores of persistence items were superior to those of Comparative Examples 1 and 3 to 4.

[Test Example 3] Evaluation of ultraviolet shielding ability

In order to compare the ultraviolet blocking power of Example 1 and Comparative Examples 1 to 4, ultraviolet blocking power was tested as follows.

Subjects: 12 (6 male, 6 female)

Test site: the left and right parts except the spine part of the back

Light source: ORIEL Solar Simulator 81293 (Xenon UV Lamp 1KW, unfiltered)

Photometer: IL1733 Radiometer, SED 240 probe

&Lt; Measuring method of SPF >

The amount of ultraviolet light radiated from the solar simulator lamp to the test site was adjusted to 20 to 100 mj / cm 2 and irradiated to the back region of the subject. Minimal Erythema Dosa (MED) was confirmed after 24 hours of UV irradiation. In order to confirm the ultraviolet blocking effect of the sample, the sample was uniformly coated on the back surface of the subject at a thickness of 2 μl / cm 2, left to stand for 15 minutes, and dried. The ultraviolet ray irradiation window was attached and fixed to the sample application areas of Example 1 and Comparative Examples 1 to 4, and ultraviolet rays were irradiated to other portions except the irradiation windows by cutting off ultraviolet rays using leather and a towel. SPF 50 based on the subject's MED, and the expected sample starting from the SPF 15-40, dose, and gradually increasing the ultraviolet dose. The minimum erythema was determined after 24 hours of ultraviolet irradiation, and the ultraviolet blocking effect was calculated according to the following equation (1). The results are shown in Table 4 below.

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 SPF (average) 55.2 26.7 54.2 53.9 27.1

As can be seen from the results of Table 4, it was confirmed that the cosmetic composition for UV screening according to the present invention (Example 1) has excellent effect of protecting the skin from ultraviolet rays because the UV screening components are applied evenly on the skin.

Claims (14)

An aqueous phase comprising polymethylsilsesquioxane; And a water-in-oil portion containing silica, an organic ultraviolet screening agent and an inorganic ultraviolet screening agent on the water receiving layer as an active ingredient.
The cosmetic composition according to claim 1, wherein the polymethylsilsesquioxane is dispersed in at least one member selected from the group consisting of glycerin, propylene glycol and butylene glycol before being contained in water.
The cosmetic composition according to claim 1, wherein the polymethylsilsesquioxane is contained in an amount of 0.1 to 4.0% by weight based on the total weight of the cosmetic composition.
The cosmetic composition according to claim 1, wherein the silica is contained in an amount of 0.01 to 5.0% by weight based on the total weight of the cosmetic composition.
The cosmetic composition according to claim 1, wherein the inorganic UV-blocking agent is at least one selected from the group consisting of titanium dioxide, zinc oxide, silicate and talc.
The cosmetic composition according to any one of claims 1 to 5, wherein the inorganic UV-blocking agent is contained in an amount of 0.1 to 15.0% by weight based on the total weight of the cosmetic composition.
The cosmetic composition of claim 1, wherein the composition comprises polymethylsilsesquioxane, silica, an organic sunscreen agent and an inorganic sunscreen agent in a weight ratio of 2: 1: 16: 11.
The organic UV curing agent according to claim 1, wherein the organic UV blocking agent is selected from the group consisting of octyl methoxycinnamate, cinnamate derivatives of isoamyl-p-methoxy cinnamate, butyl methoxydibenzoyl methane, bisethylhexyloxyphenol methoxyphenyltriazine, Salicylic acid derivatives of salicylic acid, PABA derivatives, benzophenone, and anthranilate.
6. The cosmetic composition according to claim 1, wherein the composition contains 25.9 wt.% Water based on the total weight of the cosmetic composition and 74.1 wt.% Oily part.
The cosmetic composition according to claim 3, wherein the polymethylsilsesquioxane is contained in an amount of 0.4 to 3.0% by weight based on the total weight of the cosmetic composition.
5. The cosmetic composition according to claim 4, wherein the silica is contained in an amount of 0.4 to 4.0% by weight based on the total weight of the cosmetic composition.
The cosmetic composition according to claim 6, wherein the inorganic UV-blocking agent is contained in an amount of 2.0 to 11.05% by weight based on the total weight of the cosmetic composition.
The cosmetic composition according to claim 1 or 8, wherein the organic sunscreen agent is present in an amount of 16% by weight based on the total weight of the cosmetic composition.
The cosmetic composition according to claim 1, wherein the composition has a Sun protection factor (SPF) of 50 or more and an ultraviolet A blocking degree of PA +++,
UV blocking index = (minimum erythema amount of the skin portion applied with cosmetic composition for ultraviolet screening) / (minimum erythema amount of skin portion not coated with cosmetic composition for ultraviolet screening)