WO2020071643A1 - Stick-type cosmetic composition comprising inorganic ultraviolet blocker for blocking ultraviolet radiation - Google Patents

Abstract

The present invention relates to a stick-type cosmetic composition comprising an inorganic ultraviolet blocker for blocking ultraviolet radiation. A cosmetic composition according to an aspect has an easy-to-use transparent stick form, contains only an inorganic ultraviolet blocker with excellent stability, leaves no white cast, causes no sweating, exhibits excellent spreadability, and is not oily, and therefore, the cosmetic composition provides an excellent texture when used.

Description

Stick type sunscreen cosmetic composition comprising inorganic sunscreen

The present invention relates to a stick-type sunscreen cosmetic composition comprising an inorganic sunscreen, which has no cloudiness and has excellent usability.

Sunlight can be classified into infrared rays, visible rays, and ultraviolet rays. Among them, ultraviolet rays, which can adversely affect the skin, can be generally classified into three types as follows according to the length of the wavelength. Ultraviolet C (hereinafter referred to as UVC), which is a wavelength of 200-290 nm, disappears due to reflection or scattering when it reaches the ozone layer and does not reach the surface, but ultraviolet B (hereinafter referred to as UVB) with a wavelength of 290-320 nm and 320-400 nm Ultraviolet A (hereinafter referred to as UVA) having a wavelength of reaching the surface of the body has various effects on human skin. It is known that UVB penetrates the epidermis of the skin and can cause erythema, freckles, and swelling, and UVA penetrates the dermis of the skin, causing melanin and wrinkle formation and skin cancer, causing skin aging and skin irritation. As the public's interest in sunscreen products increases as the risk of sun exposure becomes known, products with various sun protection factors (SPF) and sun protection A (protection grade of UVA, PA) Is being released.

Sunscreens include chemical sunscreens, organic sunscreens, and physical sunscreens, inorganic sunscreens. The sunscreen cosmetics composed of organic sunscreens may cause a decrease in skin coverage such as stickiness and shine, and may have a skin irritation risk due to a chemical reaction. If an inorganic sunscreen is used to solve this, it has a high sunscreen effect, has no phototoxicity, and is safe from contact dermatitis, but has a problem in that the skin appears white or cloudy when applied.

In recent years, as the perception of frequently applying sunscreen is increasing, there is a growing demand for sunscreen stick-type sunscreens that are easy to apply. However, when the sunscreen composition containing the inorganic sunscreen is manufactured in a stick form, there is a problem in that it is difficult to commercialize due to the poor whiteness and poor softness, thus reducing the feeling of use and becoming stiff.

Therefore, there is a need for the development of a stick-type UV-blocking cosmetic composition having soft irritation and eliminating white turbidity and shine due to this, while being composed only of an inorganic sunscreen having little irritation.

One aspect is a stick-type sunscreen cosmetic composition having only mild irritation, whitening and shine and excellent repellency, including only an inorganic sunscreen, and an inorganic sunscreen is pre-dispersed and contains a glutamide gelling agent It provides a cosmetic composition to do.

One aspect is an inorganic sunscreen and an amino acid-based gelling agent dispersed in Triethoxycaprylylsilane, Coco-Caprylate / Caprate and Polyhydroxystearic Acid It provides a cosmetic composition for sun protection comprising a.

One aspect is an inorganic sunscreen and an amino acid-based gelling agent dispersed in Triethoxycaprylylsilane, Coco-Caprylate / Caprate and Polyhydroxystearic Acid. It provides a sunscreen method comprising the step of applying an effective amount of a cosmetic composition for sunscreen comprising a to the skin of an individual in need thereof.

One aspect, for use in the preparation of a sunscreen cosmetic composition, Triethoxycaprylylsilane, Coco-Caprylate / Caprate and Polyhydroxystearic Acid It provides the use of a composition comprising an inorganic sunscreen and an amino acid-based gelling agent dispersed in).

As used herein, the term "cosmetic composition" means an article used in the human body to clean and beautify the human body to add attractiveness and to change the appearance brightly or to maintain or promote the health of the skin and hair. The cosmetic composition may be for UV protection.

In the cosmetic composition according to one aspect, the inorganic sunscreen is not even in powder form, but is evenly dispersed in the composition because it is a form dispersed in triethoxycaprylylsilane, cococaprylate / caprate, and polyhydroxystearic acid. It does not clump and spreads evenly on the skin without cloudiness and has a high UV blocking effect. In addition, since it contains an amino acid-based gelling agent as a gelling agent, a transparent formulation can be realized and a composition having excellent stability without breaking or sweating can be produced.

The cosmetic composition according to one embodiment may have a high blocking index, for example, SPF50 +, PA ++++.

The cosmetic composition according to an embodiment may not include an organic sunscreen.

The triethoxycaprylylsilane, cococaprylate / caprate, and polyhydroxystearic acid may serve as a dispersion medium and a dispersant for dispersing the inorganic sunscreen.

In the composition, triethoxycaprylylsilane, cococaprylate / caprate, and polyhydroxystearic acid may be included in the dispersion medium in an amount of about 4, 30, and 6 wt%, respectively, based on the total weight of the cosmetic composition. If the organic sunscreen is dispersed and included in the cosmetic composition to increase dispersibility and maintain a stabilized formulation for a long time, it is not limited thereto.

If the inorganic sunscreen is a physical barrier that prevents skin penetration by scattering and reflecting ultraviolet rays by applying a protective film on the surface of the skin, the type is not limited, but specifically, titanium dioxide (TiO ₂ ), particulate titanium dioxide, aluminum hydroxide (Aluminum) Hydroxide, stearic acid, zinc oxide (ZnO), and iron oxide (FeO).

The inorganic sunscreen may include about 10 to 25% by weight, about 12 to 24% by weight, about 15 to 23% by weight, about 17 to 22% by weight, or about 20% by weight relative to the total weight of the cosmetic composition. When the inorganic sunscreen is less than 10% by weight, the sunscreen effect may not be sufficient. When the inorganic sunscreen is included in excess of 25% by weight, cloudiness may increase and formulation stability may be deteriorated.

The inorganic sunscreen may be included in the cosmetic composition in a form other than a powder form. Instead, the inorganic sunscreen may be in a form dispersed in triethoxycaprylylsilane, cococaprylate / caprate, and polyhydroxystearic acid. As the inorganic sunscreen has a pre-dispersed base form, the formulation stability is increased and the clumping phenomenon is eliminated because it is evenly dispersed in the composition as compared to the case of being included in the composition in a powder form. When the agglomeration phenomenon is eliminated, the cloudiness phenomenon is reduced and the UV blocking effect is excellent. The inorganic sunscreen may be dispersed by bead milling.

The amino acid-based gelling agent is a low-molecular-weight oil gelling agent and is not limited to any kind of low-molecular-weight amino acid-based oil gelling agent, for example, dibutyl ethylhexanoyl glutamide, dibutyl lauroyl Dibutyl Ethylhexanoyl Glutamide, Polyacrylamide, Acrylamide. The amino acid-based gelling agent is a powder at room temperature and is mixed with an oily oil component to be uniformly dissolved at a high temperature of about 130 ° C. or higher to become a transparent liquid, so it can be cooled and formulated into a transparent stick form.

The gelling agent is about 1 to 15% by weight, about 3 to 14% by weight, about 5 to 13% by weight, about 6 to 12% by weight, about 8 to 11% by weight, or about 10% by weight relative to the total weight of the cosmetic composition Can be included. When the gelling agent is contained less than about 1% by weight, the composition may not have sufficient strength, which may easily break. When the gelling agent is contained in excess of about 15% by weight, the strength may be too large, resulting in stiff applicability and deterioration in use.

The composition according to one aspect may further include an oil component or a wax.

The oil component may be at least one selected from the group consisting of ester oil, hydrocarbon oil, vegetable oil and mixtures thereof. For example, octyldodecanol, diphenylsiloxyphenyltrimethicone, dibutyl adipate, etc. may be used, but is not limited thereto.

The oil component may be included about 10 to 50% by weight based on the total weight of the cosmetic composition. When the oil component is less than about 10% by weight, there is a problem in that it is impossible to form a stick formulation because the gelling agent in powder form cannot be dissolved.

The wax may be a mineral wax. For example, a microcrystalline wax (Microcrystalline Wax), ceresin (Ceresin), ozokerite (Ozokerite), polyethylene (Polyethylene), or a combination thereof, but may be included, but is not limited thereto.

The wax comprises about 1 to 5% by weight, about 2 to 4% by weight, about 2.2 to 3.5% by weight, about 2.3 to 3.3% by weight, about 2.5 to 3.0% by weight, or about 2.7% by weight relative to the total weight of the cosmetic composition It can be. When the wax is included in less than about 1% by weight, the gelling effect is insufficient, and thus the cosmetic composition may not be formulated in a stick form. If the wax is contained in excess of about 5% by weight, the formulation may be too hard, resulting in a problem of reduced usability such as spreadability.

In addition, by including the oil component and the wax in the above range, there is an effect of improving the shine and feel of the cosmetic composition.

The composition may have a transparent stick formulation. The stick shape may be a cylinder or a polygonal column, but is not limited thereto. The stick formulation is characterized by excellent spreadability because of its moderate hardness. The composition includes wax and oily ingredients to formulate a stick formulation, but has excellent characteristics of shine and spreadability compared to a sunscreen cosmetic of a conventional stick formulation.

Since the composition is easy to be formulated as a solid, it can be prepared by molding in various types of containers. Further, the composition may be provided in a product container including a rolling device.

The composition may be one that does not contain an organic sunscreen. In general, the organic sunscreen does not cause skin trouble compared to the inorganic sunscreen, and thus has excellent skin stability.

The makeup cosmetic composition according to one embodiment also includes additional ingredients commonly used in cosmetics, such as fragrances, dyes, fillers, preservatives, thickeners, neutralizing agents, sweeteners, vitamins, free-radical scavengers and metal ion blockers, and Any conventional cosmetic ingredients that can be selected from mixtures of these.

The makeup cosmetic composition according to one embodiment is used in addition to other active agents or colorants, and has functions such as color (tone) expression, brightness, three-dimensional effect, moisturizing effect, whitening improvement, anti-wrinkle, UV protection, anti-aging and pearl feeling It may be a thing.

One skilled in the art can select any additional ingredients and / or amounts thereof so that the advantageous properties of the compositions according to the present specification are not adversely or substantially unaffected by the expected addition.

The composition according to the invention can be produced through known methods commonly used in cosmetics or dermatology. For example, it can be prepared by heating the components in the composition to impart fluidity, and then dispersing the powder in it to mold into various types of containers.

The cosmetic composition according to an aspect has a transparent stick form that is easy to use and contains only an inorganic sunscreen having excellent stability, but does not have a cloudiness, sweating effect, excellent spreading property, and is excellent in use without being shiny.

1 is a result of evaluating the turbidity of the cosmetic composition prepared according to Example 1 and Comparative Examples 1 to 4.

It will be described in more detail through the following examples. However, these examples are intended to illustrate one or more embodiments by way of example, and the scope of the present invention is not limited to these examples.

Example 1. Preparation of the cosmetic composition (Example 1) and Comparative Examples 1 to 4 according to the present invention

The cosmetic compositions of Example 1 and Comparative Examples 1 to 4 having the composition (unit: wt%) as shown in Table 1 below were prepared. A phase is a solvent, B phase is an organic ultraviolet blocking agent and a solvent, and C phase is an inorganic ultraviolet blocking agent and a UV blocking agent and a solvent.

According to the components and compositions shown in Example 1, the A phase was heated to 130 ° C. or higher to completely dissolve, and then the transparency was confirmed, and then the B and C phases were added and stirred. After confirming that it was completely dissolved and dispersed, it was cooled to room temperature to prepare a sunscreen cosmetic. Phase C is an inorganic sunscreen base mixed uniformly according to the composition of Table 1, and treated with a bead mill twice to base it. It is desirable to keep it completely sealed and store at room temperature.

According to the components and compositions shown in Comparative Example 1, the A phase was heated to 130 ° C. or higher to completely dissolve it, and after checking the transparency, the B phase was added and stirred. After confirming that it was completely dissolved and dispersed, it was cooled to room temperature to prepare a sunscreen cosmetic.

According to the components and compositions shown in Comparative Examples 2 to 4, the A phase was heated to 130 ° C. or higher to completely dissolve, and then the B phase and the C phase were added and stirred. After confirming that it was completely dissolved and dispersed, it was cooled to room temperature to prepare a sunscreen cosmetic.

division	Raw material name	Example 1	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
Phase A	Octyldodecanol	30	30	30	30	30
	Dibutyl ethyl hexanoyl glutamide	5	5	5	5	5
	Dibutyl lauroyl glutamide	5	5	5	5	5
Phase B	Diphenylsiloxyphenyltrimethicone	to 100	to 100	to 100	to 100	to 100
	Polyglyceryl-3 polydimethylsiloxyethyldimethicone	One	One	One	One	One
	Dibutyl adipate	10	10	10	10	10
	Ceresin	2.7		2.7	2.7	2.7
	Ethylhexylmethoxycinnamate		7
	Ethylhexyl salicylate		4
	Octocrylene		3
	Diethylaminohydroxybenzoylhexylbenzoate		3
	Bis-ethylhexyloxyphenolmethoxyphenyltriazine		3
Phase C	Titanium dioxide			20	10
	Zinc oxide	20			10	20
	Triethoxycaprylylsilane	1.3
	Coco caprylate / caprate	10
	Polyhydroxystearic acid	2

The content of the sunscreen in the composition was fixed to a total of 20% by weight and the proportion of oil and powder was adjusted. Specifically, Comparative Example 1 includes an organic sunscreen as a sunscreen. Comparative Example 2 contains only titanium dioxide among inorganic sunscreens as a sunscreen, and titanium dioxide is not base with triethoxycaprylylsilane, cococaprylate / caprate, polyhydroxystearic acid, and is included as a powder. Will be. Comparative Example 3 is the same as Comparative Example 2, except that titanium dioxide and zinc oxide are included in the inorganic sunscreen as the sunscreen. Comparative Example 4 is the same as Comparative Example 2, except that it contains only zinc oxide of the inorganic sunscreen as a sunscreen.

Experimental Example 1. Stability evaluation

The stability of the cosmetic composition prepared according to Example 1 and Comparative Examples 1 to 4 was evaluated. The stability evaluation is to evaluate the stability by observing the state of the product after storage at -4 ℃, RT (room temperature), 45 ℃ for 1 to 3 months. During the evaluation, the stability of the stick formulation and the sweating phenomenon on the surface of the sample were observed with the following evaluation criteria, and the observation results are shown in Table 2.

<Evaluation criteria>

◎ Very good, ○ Good, △ Moderate, X bad

		Example	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
Sweating	-4 ℃	◎	○	◎	◎	◎
	RT	◎	△	◎	◎	◎
	45 ℃	◎	X	◎	◎	◎
discoloration	-4 ℃	◎	○	◎	◎	◎
	RT	◎	○	◎	◎	◎
	45 ℃	◎	X	◎	◎	◎

As shown in Table 2, Example 1 and Comparative Examples 2 to 4 except for Comparative Example 1 in which an organic sunscreen was used showed very good results in stability such as sweating and discoloration. Therefore, it was confirmed that when an inorganic sunscreen is used when preparing a solid type sunscreen composition, stability, such as sweating and discoloration, is superior to when using an organic sunscreen.

Experimental Example 2. Evaluation of the performance of blocking the sun light

The sunscreen performance of the cosmetic compositions prepared according to Example 1 and Comparative Examples 1 to 4 was evaluated. Using a UV Transmittance analyzer UV-2000S machine from Labsphere, each composition of ² mg / cm ² was spread on a SPF measuring plate according to the method provided in the manual, and then the UV protection index was measured. Table 3 shows the results.

	Example 1	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
SPF	110	56	37	44	39
PA	++++	++++	+++	+++	+++

As shown in Table 3 above, triethoxycaprylylsilane, cococaprylate / caprate, and polyhydride are compared with Comparative Examples 2 to 4 in which the inorganic sunscreen was included in the composition alone in powder form. The composition of Example 1, which was used as a base with hydroxystearic acid, showed the best sunscreen effect. In particular, in Comparative Example 4, only zinc oxide was used as the inorganic sunscreen, as in Example 1, but the composition was used in powder form. Since it was included, it can be seen that the sunscreen effect was poor compared to Example 1.

Experimental Example 3. Evaluation of preference for feeling of use

The preference for the usability of the cosmetic compositions prepared according to Examples 1 and Comparative Examples 1 to 4 was evaluated. The composition of Example 1 and Comparative Examples 1 to 4 was evaluated for 20 males and females aged 25 to 35 years, and evaluation of application and stickiness, shine, transparency, and overall satisfaction. Table 4 shows the evaluation criteria and the results according to the evaluation criteria.

<Evaluation criteria>

Very bad: 1, Bad: 2, Normal: 3, Good 4, Very good: 5

	Example 1	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
Spreadability	3.8	4.1	2.4	3.3	3.7
Stickiness	4.3	1.3	4.2	4.0	4.0
Shine	3.9	1.9	4	3.9	3.7
Absorbed back transparency	4.1	5	1.4	2.8	3.6
satisfaction	4.0	3.3	2.1	2.9	3.4

As shown in Table 4, Comparative Example 1 using an organic sunscreen had excellent spreadability and high transparency after being applied to the skin, but overall satisfaction was low due to stickiness and heavy shine. In the case of Comparative Examples 2 to 4 including the inorganic sunscreen, since it was composed only of the inorganic sunscreen, there was little stickiness or shine, but the transparency after absorption was low. In other words, the overall satisfaction was low because the cloudiness was severe. On the other hand, in the case of Example 1 according to one aspect, the organic sunscreen in terms of transparency and spreadability after being absorbed while being less sticky or shiny because it is composed of only inorganic sunscreen. It was similar to Comparative Example 1 included, and overall, satisfaction was highest.

Experimental Example 4. Skin irritation test

Skin irritation properties of the cosmetic compositions prepared according to Examples 1 and 4 were evaluated. After applying each cosmetic composition to the skin of 20 general people, a skin patch test was conducted. The evaluation criteria and results according to the evaluation criteria are shown in Table 5 below.

<Evaluation criteria>

++: strong trouble, +: weak trouble, ±: normal,-: negative

	Example 1	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
++		2
+		4	One	2	One
±	6	12	6	6	6
-	14	2	13	12	13

As shown in Table 5, Comparative Example 1 containing an organic sunscreen was confirmed to be dangerous because of high skin irritation compared to Examples 1 and 2 to 4 containing an inorganic sunscreen. Even when Example 1 and Comparative Examples 2 to 4 including the inorganic sunscreen were compared, Example 1 was found to have no irritation to the human skin than Comparative Examples 2 to 4 because even a weak trouble was not found. Therefore, it can be seen that the sunscreen composition according to one aspect has excellent skin stability.

Experimental Example 5. Confirmation of turbidity

The turbidity of the cosmetic composition prepared according to Example 1 and Comparative Example 2 was evaluated. After applying each composition to 8µl / 4cm ² of artificial leather, the L value of the product was measured three times, and the White Cast Index was calculated using Equation 1 as follows:

[Equation 1]

White Cast Index = ((Sample measurement value-Base value) * 100)) / (Saturation value-Base value)

As a measuring instrument, a spectrophotometer (CM-2600d) (KONICA MINOLTA, Japan) and a Sony A7R Camera (Sony, Japan) were used.

1 is a result of evaluating the turbidity of the cosmetic composition prepared according to Example 1 and Comparative Example 3 by repeating three times.

As shown in FIG. 1, Example 1 does not have a cloudiness phenomenon, whereas Comparative Example 2 confirms that the cloudiness phenomenon is much worse than Example 1.

Claims (12)

1. Triethoxycaprylylsilane, coco-caprylate / caprate, and inorganic sunscreen dispersed in polyhydroxystearic acid and amino acid-based gelling agent Cosmetic composition for UV protection.
2. The method according to claim 1, The inorganic sunscreen is titanium dioxide (TiO ₂ ), zinc oxide (ZnO) or a cosmetic composition of the combination thereof.
3. The method according to claim 1, wherein the amino acid-based gelling agent is dibutyl ethyl hexanoyl glutamide (Dibutyl Ethylhexanoyl Glutamide), dibutyl lauroyl glutamide (Dibutyl Ethylhexanoyl Glutamide) or a cosmetic composition thereof.
4. The method according to claim 1, The amino acid-based gelling agent is a cosmetic composition that is contained in 1 to 15% by weight relative to the total weight of the cosmetic composition.
5. The method according to claim 1, Cosmetic composition that further comprises an oil component or a wax.
6. The method according to claim 5, The oil component is a cosmetic composition that is included in 10 to 50% by weight relative to the total weight of the cosmetic composition.
7. The method according to claim 5, The wax comprises a mineral wax, the cosmetic composition is contained in 1 to 5% by weight relative to the total weight of the cosmetic composition.
8. The method according to claim 1, The inorganic sunscreen is a cosmetic composition that is included in 10 to 25% by weight relative to the total weight of the cosmetic composition.
9. The method according to claim 1, cosmetic composition having a transparent stick formulation.
10. The method according to claim 1, Cosmetic composition that does not contain an organic sunscreen.
11. Triethoxycaprylylsilane, coco-caprylate / caprate, and inorganic sunscreen dispersed in polyhydroxystearic acid and amino acid-based gelling agent A method of blocking sunblock, comprising applying an effective amount of a sunscreen cosmetic composition to the skin of an individual in need thereof.
12. Dispersed in triethoxycaprylylsilane, coco-caprylate / caprate and polyhydroxystearic acid for use in the preparation of sunscreen cosmetic compositions Of a composition comprising an inorganic inorganic sunscreen and an amino acid-based gelling agent.

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