KR101773095B1 - Non-separation type sunscreen composition with low viscosity - Google Patents

Abstract

The present invention relates to a low viscosity non-separable ultraviolet screening composition, and more particularly, to an ultraviolet screening composition comprising sodium stearoyl glutamate, a natural anionic surfactant, and Inulin Lauryl Carbamate, a saccharide surfactant, The present invention relates to a non-separable type ultraviolet ray blocking composition having a low viscosity which is stable and has a good feeling on use by being manufactured to have a viscosity of less than 6,000 cPs as an emulsifier.

Description

[0001] The present invention relates to a non-separation type sunscreen composition with low viscosity,

The present invention relates to a low viscosity non-separable ultraviolet screening composition, and more particularly, to an ultraviolet screening composition comprising sodium stearoyl glutamate, a natural anionic surfactant, and Inulin Lauryl Carbamate, a saccharide surfactant, The present invention relates to a non-separable type ultraviolet ray blocking composition having a low viscosity which is stable and has a good feeling on use by being manufactured to have a viscosity of less than 6,000 cPs as an emulsifier.

Skin aging is closely related to increased wrinkles, sagging and relaxation. Continuous exposure to ultraviolet light is a direct cause of skin aging, resulting in deep wrinkles, sagging skin, uneven spots, It is harmful. There have been many researches on ultraviolet (UV) blocking agents as cosmetics that inhibit or retard skin aging, and physical blocking agents for many organic and inorganic UV blocking agents have been developed and used.

Formulations of sunscreen agents include cream, lotion, spray type, solid type and mousse type. Creams and lotions can be used together with organic and inorganic sunscreen agents. They are also suitable for making products with high UV index by containing a high amount of inorganic sunscreen by adjusting the viscosity to a high level. However, However, there is a problem that the spray type is suitable for application to a wide area and has a feeling of light feeling, but it can not contain a large amount of ultraviolet ray blocking agent. In addition, the organic UV screening agent has a high polarity and is difficult to be stabilized by the low viscosity fluid. The inorganic UV screening agent has a high specific gravity and may precipitate at a low viscosity. Due to the difficulty of this shape, the spray type is predominantly a detachable type ultraviolet screening product which is used by re-emulsification by shaking just before use.

As a result of efforts to produce a low-viscosity ultraviolet screening agent, the present inventors have found that when a sunscreen composition is prepared using sodium stearoylglutamate, a natural anionic surfactant, and inulin laurylcarbamate, a saccharide surfactant, viscosity of less than 6,000 cPs Of the present invention can be prepared, and the present invention has been completed.

Accordingly, an object of the present invention is to provide a low-viscosity, non-separable ultraviolet blocking composition which is stable and excellent in feeling of use.

In order to achieve the above object, the present invention provides a low-viscosity non-separating type ultraviolet blocking composition comprising sodium stearoyl glutamate and inulin lauryl carbamate as emulsifiers and having a viscosity of less than 6,000 cPs.

Since the ultraviolet screening composition according to the present invention has a low viscosity and a good flowability, it is suitable to be applied to a wide area, and it is convenient to use it because there is no inconvenience of shaking for uniform mixing while giving a feeling of light feeling.

In order to provide a feeling of light feeling, the present invention is characterized in that the viscosity is adjusted to less than 6,000 cPs, more preferably 3,000 cPs to less than 6,000 cPs, and a low viscosity non-separating ultraviolet ray Blocker composition.

The ultraviolet screening composition according to the present invention may contain 0.1 to 10% by weight of an emulsifier, 0.1 to 5% by weight of an emulsion stabilizer, 0.01 to 5% by weight of a viscosity modifier, 0.1 to 10% by weight of an emollient, % ≪ / RTI > by weight.

In the present invention, sodium stearoyl glutamate, which is a natural anionic surfactant, and inulin surfactant, inulin lauryl carbamate, which is a saccharide surfactant, are used as an emulsifier in order to prepare a low viscosity non-detachable ultraviolet screening composition. Preferably, sodium stearoylglutamate And inulin lauryl carbamate in a weight ratio of 1: 1 to 1: 3. The emulsifier is preferably contained in an amount of 0.1 to 10% by weight based on the total weight of the composition, and the content of the emulsifier serves as a main parameter for forming a low-viscosity ultraviolet screening agent. That is, when the content of the emulsifier is more than 10% by weight, the viscosity is too high because it does not match the blend ratio of the oil phase. When the content of the emulsifier is less than 0.1% by weight, the emulsification force is decreased and the emulsion stability is lowered.

The emulsion stabilizer used in the present invention plays a role of enhancing the stability of the formed emulsion. For example, at least one selected from the group consisting of stearic acid, cetearyl alcohol and behenyl alcohol can be used, It is not. The emulsion stabilizer serves to prevent the oil separation phenomenon by maintaining a stable formulation even if the composition of the present invention has a low viscosity over time, and may be contained in an amount of 0.1 to 5% by weight based on the total weight of the composition. When the content of the emulsion stabilizer is less than 0.1% by weight, the stability of the emulsion is deteriorated. When the content of the emulsion stabilizer is more than 5% by weight, the viscosity is excessively increased.

The emollients used in the present invention can help stabilize formulations by having a lower polarity than organic sunscreens such as hydrocarbons such as hydrogenated polyisobutene, hydrogenated polydecenes and phytosqualanes; And triglycerides such as caprylic / capric triglyceride, meadowfoam seed oil and sunflower seed oil. However, the present invention is not limited thereto. In addition, the emollient may be contained in an amount of 0.1 to 10% by weight based on the total weight of the composition. When the content is less than 0.1% by weight, the emollient can not help stabilize the formulation, It is not preferable because a proportion of the oil phase in the oil phase becomes too large and a sufficient amount of ultraviolet blocking agent can not be used.

The selection of a viscosity modifier is also very important in the preparation of the ultraviolet screening composition according to the present invention. Viscosity modifiers act to keep the particles generated by emulsification from floating in the upper layer while maintaining a low viscosity. In the present invention, as a viscosity modifier, at least one gum selected from the group consisting of xanthan gum, gellan gum, natto gum, guar gum and hydrolyzates thereof is mixed with hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer ( hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer) may be mixed with the mixture of the gums and the polymer at a weight ratio of 1: 0.1 to 1: 0.5. The viscosity controlling agent may be contained in an amount of 0.01 to 5% by weight based on the total weight of the composition. When the content is less than 0.01% by weight, the stability of the formulation is not improved. When the content is more than 5% by weight, It is undesirable because it causes deterioration of the property.

The ultraviolet screening agent to be used in the present invention is not particularly limited and is generally selected from para-aminobenzoic acid (PABA) derivatives, cinnamate derivatives, salicylic acid derivatives, benzophenones and anthranilates organic anthranilates such as anthranilates; And inorganic ultraviolet blocking agents such as zinc oxide, titanium dioxide, iron oxide, and magnesium oxide. More specific examples of the organic UV blocking agent include ethylhexylmethoxycinnamate, isoamylparamethoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyltriazine, and methylenebis-benzotriazolyltetramethylbutylphenol. However, the present invention is not limited thereto. The ultraviolet screening agent may be contained in an amount of 1 to 20% by weight based on the total weight of the composition. When the content of the ultraviolet screening agent is less than 1% by weight, the ultraviolet barrier index is lowered. The stability of the formulation may be deteriorated.

The ultraviolet screening composition according to the present invention comprising the above-mentioned components has low viscosity and good fluidity and long-term stability, so that layer separation or deposition of powder does not occur.

In addition, the ultraviolet screening composition according to the present invention can be appropriately selected and blended with other ingredients other than the above-mentioned essential ingredients without difficulty by those skilled in the art depending on the kind of the external preparation or purpose of use.

Hereinafter, the present invention will be described more specifically with reference to examples and test examples. It is to be understood that the scope of the present invention is not limited to these embodiments and test examples, and that variations, substitutions, and insertions conventionally known in the art And this is also included in the scope of the present invention.

[Example 1 and Comparative Examples 1 to 7]

The liquid compositions of Example 1 and Comparative Examples 1 to 7 were prepared according to the compositions shown in Tables 1 and 2 (unit: wt%).

Classification ingredient Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Emollient C12-15 alkyl benzoate 6 6 9 6 Squalane 3 3 0 3 Emulsion stabilizer Stearic acid One One One 0 Emulsifier Sodium stearoyl glutamate 0.3 - 0.3 0.3 Inulin lauryl carbamate 0.5 - 0.5 0.5 Glyceryl stearate / phage-100 stearate - 1.5 - - Viscosity modifier Hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer 0.7 0.7 0.7 0.7 Xanthan gum 0.1 0.1 0.1 0.1 Preservative Phenoxyethanol Suitable amount Suitable amount Suitable amount Suitable amount Chelating agent EDTA 2 sodium salt Suitable amount Suitable amount Suitable amount Suitable amount Moisturizer glycerin Suitable amount Suitable amount Suitable amount Suitable amount Sunscreen Ethyl hexylmethoxycinnamate 7 7 7 7 Ethylhexyl salicylate 4 4 4 4 Bis-ethylhexyloxyphenol methoxyphenyltriazine 3 3 3 3 Other incense Suitable amount Suitable amount Suitable amount Suitable amount menstruum Purified water Balance Balance Balance Balance

Classification ingredient Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Emollient C12-15 alkyl benzoate 6 6 6 6 Squalane 3 3 3 3 Emulsion stabilizer Stearic acid One One One One Emulsifier Sodium stearoyl glutamate - 0.8 0.3 - Inulin lauryl carbamate 0.8 - - 0.5 Glyceryl stearate / phage-100 stearate - - One One Viscosity modifier Hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer 0.7 0.7 0.7 0.7 Xanthan gum 0.1 0.1 0.1 0.1 Preservative Phenoxyethanol Suitable amount Suitable amount Suitable amount Suitable amount Chelating agent EDTA 2 sodium salt Suitable amount Suitable amount Suitable amount Suitable amount Moisturizer glycerin Suitable amount Suitable amount Suitable amount Suitable amount Sunscreen Ethyl hexylmethoxycinnamate 7 7 7 7 Ethylhexyl salicylate 4 4 4 4 Bis-ethylhexyloxyphenol methoxyphenyltriazine 3 3 3 3 Other incense Suitable amount Suitable amount Suitable amount Suitable amount menstruum Purified water Balance Balance Balance Balance

The process for preparing the above-mentioned emulsion composition is as follows. The emollients, emulsification stabilizers, emulsifiers and sunscreen agents were classified as oil phase and the remainder as water phase.

First, the oil phase was weighed in a beaker and completely dissolved by heating to 75 ° C. At this time, the water phase was also completely melted by heating to 70 ° C. Afterwards, the water phase was shifted to the homogenizer and the riser, and the rpm was gradually increased while the oil phase was introduced. After mixing for 5 minutes at 10,000 rpm, viscosity regulator and preservative were added and mixed for 3 minutes at 7,200 rpm.

[Test Example 1] Evaluation of viscosity and long-term stability

The viscosities of the emulsion compositions prepared in Example 1 and Comparative Examples 1 to 7 were respectively measured and after storage for 4 weeks at 45 캜, the stability of the composition was visually observed to determine the presence of layer separation and precipitation phenomenon. The viscosity was measured using a Brookfield LVDV-II + P and a spindle No. 3 was used. The measurement results are shown in Table 3 below.

Evaluation items Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Viscosity (cPs) 4,700 11,000 3,900 720 4,000 3,500 4,200 3,200 Stability Layer separation none none Layer separation Layer separation Layer separation Layer separation Layer separation Layer separation Precipitation phenomenon none none none none none none none none Overall stability Good Good oil
detach oil
detach oil
detach oil
detach oil
detach oil
detach

From the results of Table 3, it was confirmed that the liquid composition of Comparative Example 1 retained its stability even after storage at 45 캜 for 4 weeks as a high viscosity liquid having a viscosity of 10,000 cPs or more.

The emulsion compositions of Comparative Examples 2 to 7 had a low viscosity formulation of less than 6,000 cPs, but the emulsion emulsion particles became more likely to coalesce. After storage for 4 weeks at 45 ° C, oil separation occurred, .

On the other hand, in the liquid composition of Example 1 of the present invention, the use of sodium stearoylglutamate, which is an anionic surfactant, increased the repulsive force between the particles to reduce the possibility of coalescence, and when the inulin lauryl carbamate was used in combination, And the long-term stability was excellent as a low-viscosity formulation for raising the emulsifying power of the particles.

Therefore, the composition using sodium stearoylglutamate and inulin lauryl carbamate together as a surfactant as in Example 1 according to the present invention can maintain long-term stability even at a low viscosity, and is most suitable as a low-viscosity, non-separation type ultraviolet screening composition Respectively.

[Test Example 2] Measurement of ultraviolet shielding index

The ultraviolet barrier index of the emulsion composition prepared in Example 1 was measured by the following method.

A solar simulator Multi-port 601 (Solarlight co., USA) was used as a device for irradiating ultraviolet rays. PMA 2100 UV meter (Solarlight co., US) The method of measuring the index was carried out in a manner generally known in the art.

As a result, the ultraviolet barrier index of the liquid composition of Example 1 according to the present invention was in the range of vivo measurements showed SPF 15.3 / PA +.

It is generally known that the ultraviolet barrier index capable of sufficiently blocking living UV rays is about SPF 15 / PA +. Therefore, it was confirmed that the liquid composition of Example 1 according to the present invention has a UV blocking index that can sufficiently block the life UV rays, thereby protecting the skin from the effects of ultraviolet rays exposed in daily life.

Claims (10)

A mixture of sodium stearoyl glutamate and inulin lauryl carbamate as emulsifying agents;
Stearic acid as an emulsion stabilizer;
Viscosity modifiers;
A mixture of squalane and a hydrocarbon-based compound as an emollient; And
An ultraviolet screening composition comprising an ultraviolet screening agent,
The content of the emulsifier is 0.1 to 10.0% by weight based on the total weight of the composition,
The content of the emulsion stabilizer is 0.1 to 5% by weight based on the total weight of the composition,
The content of the viscosity modifier is 0.01 to 5% by weight based on the total weight of the composition,
The emollient content is 0.1 to 10% by weight based on the total weight of the composition,
The content of the ultraviolet screening agent is 1 to 20% by weight based on the total weight of the composition,
Wherein the viscosity modifier is at least two selected from the group consisting of xanthan gum, gellan gum, natto gum, guar gum, and hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer,
Wherein the hydrocarbon compound is at least one selected from the group consisting of C12-15 alkyl benzoate, hydrogenated polyisobutene, hydrogenated polydecene, and phytosqualane,
Having a low viscosity of from 3,000 cPs to 4,700 cPs. The method according to claim 1,
Wherein the content of the emulsifier is 0.8% by weight based on the total weight of the composition. The method according to claim 1,
Wherein the content of the emulsion stabilizer is 1% by weight based on the total weight of the composition. The method according to claim 1,
Wherein the content of the viscosity modifier is 0.8% by weight based on the total weight of the composition. The method according to claim 1,
Wherein the content of the sunscreen agent is 14% by weight based on the total weight of the composition. delete The method according to claim 1,
Wherein the viscosity modifier is a mixture of hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer and xanthan gum in a weight ratio of 7: 1. The method according to claim 1,
Wherein the emollient is a mixture of C12-15 alkyl benzoate and squalane in a 2: 1 weight ratio. The method according to claim 1,
The ultraviolet screening agent is at least one organic ultraviolet screening agent selected from the group consisting of ethylhexylmethoxycinnamate, ethylhexylsalicylate, bis-ethylhexyloxyphenol methoxyphenyltriazine, benzophenone, and anthranilic acid salts ≪ / RTI > wherein the composition further comprises at least one additive. The method according to claim 1,
Wherein the mixing ratio of emulsifier: emulsion stabilizer: viscosity modifier: emollient: ultraviolet screening agent in the composition is 0.8: 1: 0.8: 9: 14 by weight.