KR20200060621A - Composition for sun block - Google Patents

Abstract

The present invention provides a UV-blocking composition capable of maximizing UV-blocking strength while reducing a white cast and preventing skin penetration. According to one aspect of the present invention, the UV-blocking composition comprises zinc oxide and titanium dioxide, wherein the zinc oxide and the titanium dioxide are formed in a non-nano size. Here, the zinc oxide and the titanium dioxide may be formed to have an average particle size of 100-400 nm, and in order to prevent blocking materials from penetrating the skin and to prevent a white cast, more preferably, the zinc oxide may be formed to have an average particle size of 100-200 nm, and the titanium dioxide may be formed to have an average particle size of 100-300 nm.

Description

Sun protection composition {COMPOSITION FOR SUN BLOCK}

The present invention relates to a sunscreen composition, and more particularly, to a sunscreen composition containing a non-nano inorganic powder.

In general, sunscreen materials used in sunscreens are classified into organic sunscreen materials and inorganic sunscreen materials according to the sunscreen principle.

Organic sunscreen raw materials absorb ultraviolet rays by the chemical principle of molecular bonding when irradiated with ultraviolet rays, and have a transparent appearance and soft feeling, but they cause irritation or eye irritation due to the mechanism of chemical blocking on the skin. It tends to be avoided in the current market where hazards are important.

Accordingly, recently, a technology that physically reflects ultraviolet rays irradiated to the skin by using titanium dioxide and zinc oxide, which are inorganic sunscreen raw materials, to block ultraviolet rays meets the needs of consumers.

However, these inorganic sunscreen ingredients are powders on a white plate and also reflect visible light, so there is a disadvantage in that undesirable white color appears when applied to the skin. In order to minimize this phenomenon, if a small amount of sunscreen ingredients is prescribed, a problem that sufficient sunscreen values cannot be obtained occurs.

Thus, the use of a nano-sized inorganic UV-blocking material can produce a relatively soft feeling of use and less sun-blocking sunscreen, but due to the small particle size of the nano-inorganic UV-blocking material, there is a risk of penetrating and penetrating the skin.

Accordingly, there is a need to develop an inorganic barrier material that maximizes UV protection while avoiding the risk of skin penetration and pore depletion by avoiding nano size.

[Advanced technical literature]

Korea Patent Publication 10-2015-0133110 (2015. 11. 27.)

The present invention is to solve the problems of the prior art described above, the object of the present invention is to provide a sunscreen composition that prevents skin penetration while maximizing sunscreen power and reducing cloudiness.

The sunscreen composition according to an aspect of the present invention includes zinc oxide and titanium dioxide, and the zinc oxide and titanium dioxide are formed in a non-nano size.

At this time, the average particle size of the zinc oxide and the titanium dioxide may be formed of 100 to 400nm, more preferably the average particle size of the zinc oxide is 100 to 200nm in order to prevent skin penetration of the blocking raw material and prevent clouding , The average particle size of the titanium dioxide may be formed of 100 to 300nm.

At this time, the content of the zinc oxide is formed to be larger than the content of the titanium dioxide, which is mainly titanium dioxide blocking UVB, zinc oxide mainly responsible for blocking UVA, but UVA blocking due to the stronger penetration of UVA than UVB. The main purpose is to provide even UV blocking by increasing the content of zinc oxide in charge. At this time, the content ratio of the zinc oxide and the titanium dioxide is preferably formed from 2.5: 1 to 3.8: 1.

In addition, the zinc oxide and the titanium dioxide further includes a coating agent, they are preferably formed of 0.65 to 0.75wt% of the sunscreen composition. Such a coating agent further increases the UV blocking power by preventing zinc oxide and titanium dioxide, which are metal oxides, from directly contacting moisture in the formulation to further oxidize or change.

At this time, preferably, the coating agent of zinc oxide contains 0.10 to 0.20wt% of the star aric acid, and the coating agent of titanium dioxide contains at least one of silica 0.10 to 0.14wt% or laurolysine 0.05 to 0.10wt%. Do it.

In addition, it is preferable that the sunscreen composition further comprises 0.25 to 1.65 wt% of the liquid crystal emulsifying raw material, and the liquid crystal has a structure similar to that of the bio-membrane interstitial lipid, as well as a skin protective film forming and moisturizing function, as well as several water-soluble and useful efficacy components. It enhances the preservation and stability of them, and has been applied as an effective delivery medium for these ingredients. Therefore, in the composition, the raw material is formed by emulsifying the liquid crystal of the formulation, so that the UV blocking raw material is effectively preserved on the skin and stably blocking the UV.

At this time, preferably, the liquid crystal emulsifying material may be made of 0.2 to 1.2 wt% of cetearyl oleate or 0.05 to 1.45 wt of sorbitan oleate.

In addition, the sunscreen composition preferably further comprises 0.15 to 1.20 wt% of a thickener, and in this case, more preferably, the thickener is formed of ammonium acryloyl dimethyl taurate / behenes-25 methacrylate cross polymer. Can be. The thickener is a plate powder with strong cohesive properties such as zinc oxide and titanium dioxide, which are cohesive when powdered on the skin.

Furthermore, it is preferable that the sunscreen composition further includes butylene glycol, dipropylene glycol, and glycerin, which helps moisturize the formulation, prevents the skin from falling off of the sunscreen raw material and maintains the sunscreen power for a long time. It is to do so.

The sunscreen composition according to the present invention is chemically safe using a non-nano sized inorganic barrier material and further eliminates the risk of pore decay and skin penetration.

Furthermore, the present invention derives an optimized composition and significantly increases the UV blocking power that may be lacking in this case.

In addition, the present invention is safe for the skin without having an unpleasant white appearance and has a sufficient UV protection level.

1 is a photograph showing the cloudiness when the sunscreen composition according to an embodiment of the present invention is applied to the skin.
2A to 2C are photographs showing the cloudiness when the sunscreen composition according to Comparative Examples 1 to 3 is applied to the skin.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be described in detail with reference to the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and / or includes a combination of a plurality of related described items or any one of a plurality of related described items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, a sunscreen composition according to an embodiment of the present invention will be described. In this embodiment, zinc oxide is coated with stearic acid as the main UV-blocking material, and titanium dioxide is coated with silica and laurolysine. Here, cetearyl oleate and sorbitanol are used as liquid crystal emulsifiers. Rebates were used. In addition, ammonium acryloyl dimethyl taurate / behenes-25 methacrylate cross polymer was used as a thickener. Butylene glycol, dipropylene glycol, and glycerin were further mixed to prevent dropping of the raw materials. On the other hand, in order to prevent clouding and skin penetration, the average particle size of zinc oxide was used between 100 and 200 nm, and the average particle size of titanium dioxide was used between 100 and 300 nm.

Experimental Example 1

The compositions of Examples and Comparative Examples 1 to 7 were prepared as shown in [Table 1], and the UV blocking index and UV A blocking grade were measured as shown in [Table 2]. In Experimental Example 1, the sunscreen index (SPF) for the compositions of Examples and Comparative Examples 1 to 7 was measured according to the 'UV Protection Functional Test Method' among the 'Functional Cosmetic Standards and Test Methods' announced by the Ministry of Food and Drug Safety. The sample was applied to VitroSkin so that it was at the level of 2 mg / cm2, dried for 15 minutes, and measured with an SPF 290 S meter. The UV protection index was summarized as the average value of three experiments, and the results are shown in [Table 2] below.

ingredient Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Zinc oxide 2.85000 0.00000 0.95000 2.85000 2.85000 2.85000 2.85000 2.85000 Stearic Acid 0.15000 0.00000 0.05000 0.15000 0.15000 0.15000 0.15000 0.15000 Titanium dioxide 0.78500 0.78500 0.78500 0.00000 0.39250 0.78500 0.78500 0.78500 Silica 0.13500 0.13500 0.13500 0.00000 0.06750 0.13500 0.13500 0.13500 Laurolysine 0.08000 0.08000 0.08000 0.00000 0.04000 0.08000 0.08000 0.08000 Cetearyl Olivet 0.48000 0.48000 0.48000 0.48000 0.48000 0.00000 0.24000 0.48000 Sorbitan olive 0.32000 0.32000 0.32000 0.32000 0.32000 0.00000 0.16000 0.32000 Ammonium acryloyl dimethyl taurate / behenes-25 methacrylate crosspolymer 0.70000 0.70000 0.70000 0.70000 0.70000 0.70000 0.70000 0.30000 Purified water 75.49510 78.49510 77.49510 76.49510 75.99510 76.29510 75.95100 75.89510 Cetylethylhexanoate 7.00000 7.00000 7.00000 7.00000 7.00000 7.00000 7.00000 7.00000 Butylene Glycol 6.00440 6.00440 6.00440 6.00440 6.00440 6.00440 6.00440 6.00440 glycerin 3.00050 3.00050 3.00050 3.00050 3.00050 3.00050 3.00050 3.00050 Dipropylene glycol 3.00000 3.00000 3.00000 3.00000 3.00000 3.00000 3.00000 3.00000

ingredient Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 SPF in-vitro 78.3 69.2 72.11 18.61 34.2 58.24 68.56 64.35 PFA in-vitro 19.33 4.54 9.24 13.25 15.31 13.25 15.44 13.6

First, Comparative Examples 1 and 2 can be confirmed that the zinc oxide is not included or the content is small, the PFA grade is significantly reduced. Further, in Comparative Examples 3 and 4, the titanium dioxide was not included or the content was small, so there was no significant decrease in PFA, but the SFC index was significantly lower than in the Examples.

In Comparative Examples 5 and 6, when the liquid crystal emulsifying material is not included or the content is small, the SPF index and PFA grade were higher than those in Comparative Examples 1 to 4, but the liquid crystal emulsification of the inorganic blocking raw material formulation was not effective, and the UV blocking raw material was It is due to the inability to be effectively preserved on the skin. However, in the case of Comparative Example 6, it is noteworthy that the UV-blocking effect is greater than that of the prior art due to the use of a non-nano-size UV-blocking raw material.

Comparative Example 7 is a case where the content of the thickening agent ammonium acryloyl dimethyl taurate / behenes-25 methacrylate cross polymer is set small, considering that the raw material zinc oxide and titanium dioxide are plate-like powders with strong cohesiveness. , When the composition of Comparative Example 7 is applied on the skin, it is interpreted that the powders are aggregated with each other and the specific surface area is reduced, so that the degree of maintaining the dispersed state is not lowered so that the UV-blocking effect is not reduced.

In addition, Comparative Examples 3 to 7 all contain butylene glycol, dipropylene glycol, and glycerin, which help moisturize the formulation to prevent the skin from falling off of the sunscreen raw material and maintain the sunscreen for a long time Because it was intended to perform the role of helping to do so, it is judged that all of them have excellent UV protection ability.

Experimental Example 2

Sensory evaluation was performed for the turbidity by applying 0.5 g of the sunscreen composition prepared in Examples 1 and 3 of Experimental Example 1 to the skin. 1 is a photograph showing the turbidity when the sunscreen composition according to an embodiment of the present invention is applied to the skin, and FIGS. It is a picture showing turbidity.

According to the embodiment of the present invention, it shows excellent turbidity suppression effect. However, in the comparative example, it can be seen that the cloudiness phenomenon is prominently seen. Furthermore, it can be seen that in the case of Comparative Example 3, the whitening phenomenon was more pronounced than that of the composition according to the Example despite having a smaller UV blocking value. This demonstrates that even if the composition according to the embodiment contains less inorganic blocking agent, it has an efficiency with higher UV blocking power.

As described above, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms have been used, they are merely used in a general sense to easily describe the technical contents of the present invention and to help understand the invention. , It is not intended to limit the scope of the present invention. It is obvious to those skilled in the art to which the present invention pertains that other modified examples based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

Claims (12)

A sunscreen composition comprising zinc oxide and titanium dioxide, wherein the zinc oxide and titanium oxide are formed in a non-nano size.
According to claim 1,
The average particle size of the zinc oxide and the titanium dioxide is a sunscreen composition, characterized in that formed in 100 to 400nm.
According to claim 2,
The zinc oxide has an average particle size of 100 to 200 nm, and the titanium dioxide has an average particle size of 100 to 300 nm.
According to claim 1,
The content of the zinc oxide is a sunscreen composition, characterized in that formed larger than the content of the titanium dioxide.
The method of claim 4,
The content of the zinc oxide and the titanium dioxide is a sunscreen composition, characterized in that formed from 2.5: 1 to 3.8: 1.
The method of claim 5,
The zinc oxide and the titanium dioxide further comprises a coating agent, the sunscreen composition, characterized in that formed from 0.65 to 0.75wt% of the sunscreen composition.
The method of claim 6,
The sunscreen composition comprises 0.10 to 0.20wt% of star aric acid as a coating agent of zinc oxide, and 0.10 to 0.14wt% of silica as a coating agent of titanium dioxide or 0.05 to 0.10wt% of laurolysine It characterized in that it comprises a sunscreen composition.
According to claim 1,
The sunscreen composition is a sunscreen composition characterized in that it further comprises a liquid crystal emulsifying raw material 0.25 to 1.65wt%.
The method of claim 8,
The liquid crystal emulsifying raw material is a sunscreen composition, characterized in that 0.2 to 1.2wt% of cetearyl oleate or 0.05 to 1.45 wt of sorbitan oleate.
According to claim 1,
The sunscreen composition is a sunscreen composition characterized in that it further comprises 0.5 to 1.2wt% of a thickener.
The method of claim 10,
The thickener is an ammonium acryloyl dimethyl taurate / behenes-25 methacrylate cross-polymer, characterized in that the sunscreen composition.
According to claim 1,
A sunscreen composition comprising at least one of butylene glycol, dipropylene glycol, and glycerin in the sunscreen composition.

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