CN116710061A

CN116710061A - Oil-in-water cosmetic composition comprising oleogel and method for preparing the same

Info

Publication number: CN116710061A
Application number: CN202180087655.5A
Authority: CN
Inventors: 严在英; 郑允珠; 金钟根
Original assignee: Cosymanja Cosmetics China Co ltd; Cosmecca Korea Co Ltd
Current assignee: Cosymanja Cosmetics China Co ltd; Cosmecca Korea Co Ltd
Priority date: 2020-12-29
Filing date: 2021-12-14
Publication date: 2023-09-05
Also published as: KR102557085B1; KR20220094711A; WO2022145808A1

Abstract

The present invention provides an oil-in-water cosmetic composition and a method for producing the same, the oil-in-water cosmetic composition comprising: an oil; an oleogel comprising a polyurethane polymer, an amino acid compound, and a wax; and inorganic particles, wherein the oil gelled by the oil gelling agent is adsorbed by the inorganic particles, and the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase. The present invention provides a cosmetic composition, which is capable of improving itching, redness and the like of skin caused by a surfactant, and has excellent skin affinity, skin absorption rate, spreadability, skin moisturizing ability and the like, while having an oil-in-water type feel in use, by finely and stably dispersing an oil phase component in an aqueous phase in the absence of the surfactant.

Description

Oil-in-water cosmetic composition comprising oleogel and method for preparing the same

Technical Field

The present invention relates to an oil-in-water cosmetic composition comprising an oil, an oil gel and inorganic particles, and more particularly, to an oil-in-water cosmetic composition comprising: an oil; an oleogel comprising a polyurethane polymer, an amino acid compound, and a wax; and inorganic particles, wherein the oil gelled by the oil gelling agent is adsorbed by the inorganic particles, and the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase.

Background

Cosmetics have been originally used as means for enhancing or restoring the original defensive functions against external environments such as dust, chemicals, microorganisms, etc., and internal substances such as water, fat, electrolytes, etc. Another purpose of cosmetics, particularly basic cosmetics, is to supplement skin moisture and fat loss induced by daily face washing. In particular, when the self-healing ability of the skin is insufficient, it can play a very important role.

Emulsion refers to a phase comprising a simple microphase surrounded by an emulsifier. For example, if the microphase is water particles, it is a water-in-oil emulsion, and if the microphase is oil particles, it is an oil-in-water emulsion. In general, emulsification requires semi-permanent dispersion of one liquid in another, and thus, surfactants (emulsifiers) are required. The surfactant is a molecule with an amphiphilic structure and has a hydrophilic part and an oleophilic part. In the emulsion, particles finely dispersed in one phase are surrounded by an emulsifier film. The surfactant is located at the interface between the two liquids, acts to reduce interfacial tension, and forms an interfacial film of oil/water at the phase boundary, thereby preventing particles from binding to each other.

While various surfactants are commonly used after safety approval, chemical surfactants may cause irritation or allergy. And, the surfactant plays a detrimental role on the skin. In particular, most surfactants, like detergents, have a tendency to solubilize skin lipids to form micelles, and if the loss of lipids is caused by the continuous use of surfactants, the defensive membrane is weakened and the skin permeability is improved. The defensive membrane with improved permeability is prone to losing moisture, causing the skin to become dry and slow. Furthermore, foreign substances easily penetrate, causing a sensitive skin reaction. Due to the nature of this common surfactant, natural surfactants that can be obtained from nature have been sought, with lecithin being used more. However, pure lecithin has problems of odor and discoloration, and thus cannot be widely used in cosmetics, and hydrogenated lecithin widely used has a chemical structure in which an alignment parameter (packing parameter) is greater than 1/3 and less than 1, and thus has a property of forming a bilayer membrane such as a liposome rather than an emulsion, and thus does not function as a suitable surfactant.

As an example of the surfactant-free emulsion, there is an emulsification method using a similar surfactant or using a polymer having amphiphilicity. The former is a method of preparing a stable emulsion by applying high-pressure energy after temporarily forming an emulsified form using a similar surfactant (for example, US 6777450), and the latter is a method of emulsifying by using a hydrophilic portion and an oleophilic portion in a polymer. However, this emulsification method has a disadvantage in that it is difficult to achieve a water-in-oil type emulsion. As another method, pickering (emulsification) using organic particles or inorganic particles instead of surfactants is used. In this emulsification method, particles used in place of the surfactant have a property of being well wetted in the dispersion medium, but not easily wetted in the dispersion phase. The wetting ability of a particle has a direct correlation with the contact angle of the particle at the water-oil interface and is therefore a very important property for arranging the particle at the interface as well as the surfactant. Particles having good wettability to water such as silica stabilize oil-in-water emulsions, and particles having good wettability to oil such as carbon black stabilize water-in-oil emulsions. However, if the hydrophilicity or lipophilicity of the particles is too high, the particles are not present in the interface but dispersed in water or oil, respectively. For example, in korean patent application No. 2003-0069400, an oil-in-water emulsion is prepared by containing hydrophilic silica and lipophilic titanium dioxide in an inner phase (patent document 1), and in korean patent application No. 2002-0054603, a water-in-oil emulsion is prepared by using amphiphilic particles polymethylsilsesquioxane (patent document 2). In addition, pickering emulsions utilizing inorganic particles are also reported in U.S. Pat. nos. 6803049 and 5833951. However, such pickering emulsions have the disadvantage of poor water resistance, although they can improve the skin safety and feel of conventional emulsions using surfactants.

Accordingly, the present inventors have completed the present invention in the course of continuing research to develop a cosmetic that has excellent effects as a cosmetic while having a sense of use such as an oil-in-water type, by improving skin itching, redness, etc. caused by a surfactant without using a surfactant.

Disclosure of Invention

Problems to be solved by the invention

The purpose of the present invention is to provide a cosmetic composition wherein an oil phase component is stably dispersed in an aqueous phase in the absence of a surfactant. The present invention also provides a stable surfactant-free cosmetic composition which has a feel similar to that of an oil-in-water type cosmetic composition, has excellent skin affinity, and has improved skin moisturizing ability.

The present invention also provides a method for producing the above-mentioned cosmetic composition without adding a surfactant.

Solution for solving the problem

The present invention provides an oil-in-water cosmetic composition comprising: an oil; an oleogel comprising a polyurethane polymer, an amino acid compound, and a wax; and inorganic particles, wherein the oil gelled by the oil gelling agent is adsorbed by the inorganic particles.

According to the present invention, the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase, so that an oil-in-water cosmetic composition can be formed without a surfactant.

Effects of the invention

In the oil-in-water cosmetic composition according to the present invention, the oil phase component can be finely and stably dispersed in the aqueous phase without a surfactant. Thus, skin irritation such as skin itching and redness caused by the surfactant can be reduced. Further, it is possible to obtain a cosmetic having excellent skin affinity, high skin absorption rate, excellent spreadability, and improved skin moisturizing ability while having an oil-in-water type feel. Furthermore, it is possible to develop a cosmetic product which is visually transparent and smeared, has excellent moisturizing ability, and can keep the skin soft without a surfactant, and thus can make the skin more moist.

Drawings

Fig. 1 is a picture of comparative tests performed on particles of the cosmetic compositions of example 1 and comparative example 1 according to test example 1.

Detailed Description

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

However, the present invention is not limited to the specific embodiments, and it should be understood that all modifications, equivalents, and alternatives included in the spirit and technical scope of the present invention are included.

The present invention provides an oil-in-water cosmetic composition comprising: an oil; an oleogel comprising a polyurethane polymer, an amino acid compound, and a wax; and inorganic particles. Wherein the oil is gelled by the oil gelling agent, the oil gelled by the oil gelling agent is adsorbed by the inorganic particles, and the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase.

The gelled oil adsorbed by the inorganic particles may be dispersed in the aqueous phase in the absence of a surfactant. That is, the gelled oil is adsorbed by the inorganic particles, whereby the phenomenon of bonding between oils does not occur, thereby improving the stability of the dosage form. And electrostatic repulsive force is generated between the inorganic particles having the gelled oil adsorbed thereto, whereby uniform intervals can be maintained between the inorganic particles having the gelled oil adsorbed thereto, and thus the inorganic particles can be finely dispersed in the aqueous phase. The cosmetic composition can be applied to skin transparently, has burst feeling of water drop on skin surface, and can give deep moisturizing feeling to skin without irritating skin.

The above oleogel may be 0.1 to 15 weight percent, 0.1 to 12 weight percent, 0.1 to 10 weight percent, or 0.5 to 5 weight percent, most preferably 0.75 to 4.3 weight percent, relative to the total weight of the cosmetic composition. When the oil-based gelling agent is contained in an amount of less than 0.1 wt%, gelation of the oil cannot be expected, and when the oil-based gelling agent is contained in an amount of more than 15 wt%, the hardness is too high to disperse the oil finely.

The polyurethane polymer may be selected from the group consisting of HDI/trimethylol hexyl lactone crosslinked polymers; and at least one of the group consisting of HDI/PPG/polycaprolactone cross-linked polymer, preferably HDI/trimethylol caprolactone cross-linked polymer.

The amino acid compound may be a glutamine compound.

The amino acid compound may be dibutyl lauroyl glutamine, dibutyl iso Xin Xiangu ammonia amide or their combination, preferably dibutyl lauroyl glutamine and dibutyl iso Xin Xiangu ammonia amide

The wax may be a hydrocarbon wax.

The wax may be selected from mineral waxes including microcrystalline wax (ceresin wax), polyethylene wax, microcrystalline paraffin wax (microcrystalline wax), paraffin wax (Paraffin wax), ozocerite (ozocerite); or one or more of the group consisting of carnauba wax (carnauba wax) and candelilla wax (candelilla wax), preferably microcrystalline paraffin.

The oil may be gelled by a combination of the above polyurethane polymer, amino acid compound, and wax. In the case of using the above-mentioned combination of oleogels, the melting points of the respective raw materials are different, and thus, a wider formulation stability can be achieved.

The inorganic particles may be porous inorganic particles.

The inorganic particles may be at least one selected from the group consisting of silica, mica, sericite, titanium dioxide, iron oxide, zinc oxide, synthetic mica, aluminum oxide, boron nitride, polymethyl methacrylate, polymethyl silsesquioxane, and polypropyl silsesquioxane, and preferably the inorganic particles may be silica. Silica is well wetted in the aqueous phase component, whereby the oil-in-water emulsion can be easily stabilized.

The above inorganic particles may be 1 to 10 weight percent, preferably 3 to 8 weight percent, relative to the total weight of the cosmetic composition.

When the inorganic particles are contained in an amount of less than 1 weight%, the oil is not uniformly adsorbed, and when the inorganic particles are contained in an amount of more than 10 weight%, the moisture retention and softness of the prepared content are remarkably reduced.

The polyurethane-based polymer may be 0.01 to 1, 0.01 to 0.8, 0.03 to 0.6, or 0.03 to 0.4, most preferably 0.05 to 0.3, percent by weight relative to the total weight of the cosmetic composition.

The amino acid compound may be 0.05 to 5, 0.1 to 4.5, 0.1 to 4, or 0.1 to 3.5, most preferably 0.2 to 2, weight percent relative to the total weight of the cosmetic composition. In the case where the above amino acid compound is dibutyl lauroyl glutamine, dibutyl iso Xin Xiangu ammonia amide, or a combination thereof, the above dibutyl lauroyl glutamine may be 0.05 to 3 weight percent, 0.05 to 2 weight percent, or 0.1 to 1 weight percent, and the above dibutyl iso Xin Xiangu ammonia amide may be 0.05 to 3 weight percent, 0.05 to 2 weight percent, or 0.1 to 1 weight percent, relative to the total weight of the cosmetic composition.

The wax may be 0.1 to 5, 0.3 to 4.5, 0.3 to 4 or 0.3 to 3, most preferably 0.5 to 2 weight percent relative to the total weight of the cosmetic composition.

In the case where the polyurethane polymer, the amino acid compound and the wax are in the above weight ranges, the oil phase component can be easily gelled, and the oil phase component can be stably dispersed in the aqueous phase without a surfactant.

In the oil-in-water cosmetic composition of the present invention, the above aqueous phase may further comprise an aqueous phase thickener.

The aqueous phase thickener may contain one or more selected from the group consisting of cellulose gum, hydroxyethyl cellulose, gellan gum, hydroxypropyl starch phosphate, sodium polyacrylate grafted starch, xanthan gum, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, polyacrylate-13, acrylate/C10-30 alkyl acrylate cross-linked polymer, carbomer, sodium polyacrylate and sodium acrylate copolymer, preferably xanthan gum or acrylate/C10-30 alkyl acrylate cross-linked polymer, more preferably a combination of xanthan gum and acrylate/C10-30 alkyl acrylate cross-linked polymer.

The aqueous phase thickener may be 0.01 to 2 weight percent, 0.03 to 1.5 weight percent, or 0.05 to 0.5 weight percent relative to the total weight of the cosmetic composition. Preferably, in the case where the aqueous phase thickener comprises xanthan gum, acrylate/C10-30 alkyl acrylate cross-linked polymer, or a combination thereof, the xanthan gum may be 0.01 to 1 or 0.01 to 0.5 weight percent and the acrylate/C10-30 alkyl acrylate cross-linked polymer may be 0.01 to 1 or 0.05 to 0.5 weight percent.

Wherein, in the case of containing less than 0.01 weight percent of the above xanthan gum or acrylic acid ester/C10-30 alkyl acrylate cross-linked polymer, an appropriate thickening effect cannot be expected, and in the case of containing more than 1 weight percent of the above xanthan gum or acrylic acid ester/C10-30 alkyl acrylate cross-linked polymer, the viscosity of the aqueous phase is too high, whereby the feeling of use of the prepared content becomes dry.

In the oil-in-water cosmetic composition of the present invention, the oil gelled by the oil gelling agent comprising the polyurethane polymer, the amino acid compound and the wax is adsorbed by the inorganic particles, and the gelled oil adsorbed by the inorganic particles is dispersed in an aqueous phase, and the aqueous phase forms a network by the aqueous phase thickener.

The network may include a three-dimensional network of chain structures. The water phase thickener is a high molecular component, and the high molecular weight of the high molecular is high, so that a three-dimensional net-shaped long chain structure formed by winding chains can be formed.

The oil-in-water cosmetic composition of the present invention may comprise: an oil phase section containing an oil gelling agent, an oil and inorganic particles; and an aqueous phase section containing an aqueous phase thickener, a humectant, a preservative and a neutralizing agent.

The humectant, preservative, neutralizing agent and perfume mentioned above, which are generally used in cosmetic compositions, may be used without limitation.

The humectant may include one or more of glycerin, butylene glycol and glycerin polyether-26, and humectants known in the art may be used without limitation. The humectant may be 0.1 to 10 weight percent, 1 to 8 weight percent, 1 to 5 weight percent, relative to the total weight of the cosmetic composition.

The preservative may be hydroxyacetophenone, but can be used without limitation as known in the art.

The neutralizing agent may be one or more neutralizing agents selected from the group consisting of potassium hydroxide, sodium hydroxide, magnesium hydroxide, triethanolamine, tromethamine, arginine and aminomethylpropanol, and may be used without limitation as long as the neutralizing agent is known in the art. The above neutralizing agent may be 0.01 to 0.5 weight percent, 0.01 to 0.4 weight percent, or 0.05 to 0.3 weight percent relative to the total weight of the cosmetic composition.

The oil-in-water cosmetic composition may further comprise additives including perfume.

According to an aspect of the present invention, the oil phase part may be included in an amount of 15 to 50 weight percent with respect to the total weight of the cosmetic composition; the aqueous phase may be contained in an amount of 50 to 85 weight percent relative to the total weight of the cosmetic composition.

The oil-in-water cosmetic composition of the present invention can disperse oil gelled by an oil gelling agent in an aqueous phase without a surfactant, and inorganic particles that adsorb the gelled oil can stably and finely disperse the gelled oil in the aqueous phase.

According to an aspect of the present invention, the oil may be included in an amount of 1 to 50 weight percent, 5 to 40 weight percent, or 10 to 30 weight percent, relative to the total weight of the cosmetic composition. In the case of containing less than 1 weight percent of the above oil, a uniform distribution of the oil as a whole cannot be achieved, and in the case of containing more than 50 weight percent of the above oil, the stability of the prepared content becomes unstable.

The oil may include at least one selected from the group consisting of vegetable oil, mineral oil, hydrocarbon oil, ester oil, silicone oil and synthetic oil, but is not limited to the above-mentioned types, and may be used without limitation as long as it is an oil generally used in cosmetics.

According to a specific embodiment of the present invention, the above-mentioned oils may be used selected from hydrocarbon oils, including cetyl ethyl hexanoate or 2-octyldodecanol; ester oils including hydrogenated polyisobutene, glyceryl caprylate, C12-15 benzoate (C12-15 alcohols benzoates), isopropyl palmitate, octyldodecyl myristate, isopropyl myristate or butyl octanol salicylate; vegetable oils including castor oil, olive oil or jojoba oil; animal oils, including horse oil, mink oil, or egg oil; mineral oils, including mineral oil (mineral oil), isododecane, polybutene, or petrolatum; and silicone oils including phenyl-trimethylpolysiloxane, cyclomethicone, or polydimethyl polysiloxane; more than one kind of the group.

The synthetic oil may include an ultraviolet screening agent in addition to the ether or ester oil.

According to a most preferred embodiment of the present invention, there is provided an oil-in-water cosmetic composition wherein an oil gelled by an oleogel comprising an HDI/trimethylol caprolactone cross-linked polymer, dibutyl lauroyl glutamine, dibutyl iso Xin Xiangu amide and microcrystalline wax is adsorbed onto silica.

Furthermore, the present invention provides a method for preparing the oil-in-water cosmetic composition.

Specifically, the preparation method of the invention can comprise the following steps: step (a) of preparing a first aqueous phase portion comprising an aqueous phase thickener; step (B) of preparing an oil phase portion by mixing an oil gelling agent, inorganic particles and oil, wherein the oil gelling agent comprises a polyurethane polymer, an amino acid compound and wax; and (C) stirring and mixing the first water phase part and the oil phase part.

The above step (a) may be a step of mixing an aqueous phase thickener, a humectant and a preservative to prepare the first aqueous phase portion, and more specifically, in the step (a), the aqueous phase thickener, the humectant and the preservative may be mixed and stirred at a speed of 1000rpm to 3000rpm for 3 minutes to 15 minutes at a temperature of 60 ℃ to 90 ℃ to prepare the first aqueous phase portion. More specifically, the first aqueous phase portion may be prepared by dispersing the aqueous phase thickener in purified water, mixing the humectant and the preservative, and uniformly mixing and stirring at a speed of 1000rpm to 3000rpm, preferably at a speed of 1500rpm to 2000rpm, for 3 minutes to 15 minutes, preferably for 5 minutes to 10 minutes, at a temperature of 60 ℃ to 90 ℃, preferably 70 ℃ to 80 ℃.

In the above step (B), an oil-based gel comprising a polyurethane polymer, an amino acid compound and a wax is prepared by mixing an oil-based gel, inorganic particles and an oil and heating and stirring the mixture at a temperature of 60 to 150 ℃, preferably 80 to 120 ℃.

In the above step (C), the first aqueous phase portion prepared in the above step (A) and the oil phase portion prepared in the above step (B) may be stirred and mixed at a speed of 1500rpm to 3000rpm, preferably at a speed of 2000rpm to 2500rpm, for 3 minutes to 15 minutes, preferably for 5 minutes to 10 minutes.

The preparation method of the present invention may further comprise, after the steps (a) to (C), the steps of: a step (D) of adding a second aqueous phase portion containing a neutralizing agent to the stirred mixture of the step (C) and mixing; and (E) adding an additive portion containing a perfume to the mixture prepared in the step (D) and mixing the mixture, and cooling the mixture.

Specifically, in the above step (D), the second aqueous phase portion containing the neutralizing agent may be put into the stirred mixture of step (C) and stirred and mixed at a speed of 1500rpm to 3000rpm, preferably at a speed of 2000rpm to 2500rpm, for 3 minutes to 15 minutes, preferably for 5 minutes to 10 minutes, and then cooled to a temperature of 30 ℃ to 50 ℃, preferably cooled to a temperature of 40 ℃ to 45 ℃.

Specifically, the above step (E) may be a step of adding an additive portion containing a perfume to the mixture prepared in the above step (D) and mixing, and then cooling to a temperature of 20 ℃ to 40 ℃, preferably 30 ℃ to 35 ℃. More specifically, in the above step (E), the additive part containing the perfume may be added to the mixture prepared in the above step (D) and uniformly mixed, then added to the vacuum emulsification tank, stirred with a paddle mixer (paddle mixer) at a speed of 20rpm to 40rpm, preferably at a speed of 25rpm to 30rpm, for 3 minutes to 15 minutes, preferably 5 minutes to 10 minutes, and then cooled to 30 ℃ to 35 ℃.

The solvent, preservative, humectant, fatty acid, nonionic surfactant, hydrogenated butene, pH adjustor, metal chelating agent and amphoteric surfactant used in the production process of the present invention are the same as those described above in the oil-in-water cosmetic composition of the present invention.

Furthermore, the oil-in-water cosmetic composition of the present invention may be in the form of a base cosmetic such as a lotion, an emulsion, an essence, a cream, a sun cream, etc., and a make-up cosmetic such as lipstick, lip gloss, pre-make-up cream, foundation, barrier cream, etc.

Hereinafter, the present invention will be described in more detail by way of examples and the like according to the present invention, but the scope of the present invention is not limited to the following examples.

Examples

< examples 1 to 3>

According to the components shown in the following table 1, the aqueous phase portions (a) and (C), the oil phase portion (B), and the additive portion (D) were mixed, and the preparation method thereof was as follows.

(1) The aqueous phase portion (a) was put into a vacuum emulsification tank capable of temperature adjustment and stirring, and stirred with a high-speed stirrer at a speed of 1500rpm to 2000rpm for 5 minutes to 10 minutes while maintaining a temperature of 70 ℃ to 80 ℃ to be uniformly mixed.

(2) The oil phase part (B) is put into an oil phase dissolving tank capable of stirring, and heated and stirred at a temperature of 80 ℃ to 120 ℃ so as to be uniformly mixed.

(3) The prepared oil phase portion of the oil phase dissolution tank was put into the water phase portion of the vacuum emulsification tank, and stirred and mixed at a speed of 2000rpm to 2500rpm for 5 minutes to 10 minutes by a high-speed stirrer.

(4) The aqueous phase (C) was poured into a vacuum emulsification tank, stirred and mixed at a speed of 2000rpm to 2500rpm by a high-speed stirrer for 5 minutes to 10 minutes, and then cooled to 40℃to 45 ℃.

(5) The additive part (D) was charged into a vacuum emulsification tank, and after being uniformly mixed, the mixture was added to the vacuum emulsification tank, and after stirring at a speed of 25 to 30rpm for 5 to 10 minutes by a paddle stirrer, the mixture was cooled to 30 to 35℃to prepare oil-in-water type cosmetic compositions of examples 1 to 3.

TABLE 1

Comparative examples 1 and 2 ]

As shown in table 2 below, the cosmetic compositions of comparative examples 1 and 2 were prepared by the same method as the cosmetic compositions of examples 1 to 3 above, except that 4 kinds of oil gels (HDI/trimethylol hexyl lactone crosslinked polymer, dibutyl lauroyl glutamine, dibutyl iso Xin Xiangu amide, and microcrystalline wax) and silica in the oil phase part (B) of < examples 1 to 3> above were not used, but polysorbate 60 was used as a surfactant.

TABLE 2

Test example 1 particle comparative test

The shape and size of particles of the cosmetic composition of the present invention prepared in example 1 and the cosmetic composition of comparative example 1 were compared and evaluated by an optical microscope (Optical microscope) (olympus, BX53F2, japan). The results are shown in fig. 1 and table 3 below.

TABLE 3 Table 3

As a result of comparing the shape and size of the particles, it was confirmed that the particles of comparative example 1 containing the surfactant were small and dense, but the particles of example 1 containing no surfactant were large and the density was lower than that of comparative example 1. The results of example 1 were analyzed as a phenomenon caused by the absence of a surfactant, and when the cosmetic was applied to the skin, a visually transparent spreading effect, a fresh and moist feeling of use, and an immediate supply of moisture to the skin were achieved because of the large and stable particles.

Test example 2 skin moisturizing test

In order to understand the skin moisturizing effect improvement effect of the cosmetic of the present invention, the following experiment was conducted. The cosmetic composition of the present invention prepared in example 1 and the cosmetic composition of comparative example 1 were applied to the face and forearm portions 2 times daily for 1 month in groups of 2 groups of 20 subjects each, each group of subjects of 40 persons aged 20 to 50 years without skin diseases. The skin conductivity was measured in advance by a skin moisture tester (Corneometer) (germany, courage, khazaka electronic GmbH, CM 820) under constant temperature and humidity conditions (24 degrees, humidity 40%) before application, and the skin conductivity after 1 week, after 2 weeks, and after 4 weeks was measured as a reference value, and the increase rate was evaluated. The results are shown in table 4 below.

TABLE 4 Table 4

Sample of	After 1 week	After 2 weeks	After 4 weeks
				Example 1	57	60	58
Comparative example 1	23	21	22

As shown in the results of table 4, the rate of increase in skin conductivity was very excellent in example 1, which is a cosmetic of the present invention, compared to comparative example 1. That is, it is found that the cosmetic of the present invention has a remarkable effect of improving skin moisturizing ability.

< test example 3> sensory evaluation

In order to understand the skin condition improving effect of the cosmetic composition of the present invention, the following experiment was conducted. The cosmetic compositions of the present invention and the cosmetic compositions of comparative examples 1 and 2 prepared in examples 1 to 3 above were applied to the face and forearm portions 2 times per day for 1 month in groups of 5 groups of 10 subjects each, with 50 persons aged 20 to 50 years without skin diseases being treated. In the evaluation, the satisfaction of the product effect was expressed by using 1 to 5 minutes (the greater the number, the higher the satisfaction) for each item such as itching, redness, skin tightness, and dryness change, and the results are shown in table 5 below.

TABLE 5

As shown in the results of table 5 above, the cosmetic compositions of examples 1 to 3, which are the cosmetic compositions of the present invention, were significantly improved in terms of itching, redness, skin tightness and dryness, compared to the cosmetic compositions of comparative examples 1 and 2.

Further, the ending feel of examples 1 to 3 is almost similar, but example 2 shows the best results for improving redness, improving skin tightness, and improving dryness, and therefore example 2 is most excellent in terms of visually transparent smear-like effect and moist feel in use.

However, in comparative examples 1 and 2, although both of the emulsifying forces were good, the feel dry and dry in use and the phenomenon of visually transparent smearing was not observed.

Claims

1. An oil-in-water cosmetic composition comprising:

an oil;

an oleogel comprising a polyurethane polymer, an amino acid compound, and a wax; and

the inorganic particles are used as the material of the composite material,

the oil gelled by the oil gelling agent is adsorbed by the inorganic particles, and the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase.

2. The oil-in-water cosmetic composition according to claim 1, wherein,

the polyurethane polymer is selected from HDI/trimethylol hexyl lactone cross-linked polymer; and one or more of the group consisting of HDI/PPG/polycaprolactone cross-linked polymers.

3. The oil-in-water cosmetic composition according to claim 1, wherein,

the amino acid compound is dibutyl lauroyl glutamine, dibutyl iso Xin Xiangu ammonia amide or a combination thereof.

4. The oil-in-water cosmetic composition according to claim 1, wherein,

the wax is selected from more than one of mineral wax including microcrystalline wax, polyethylene wax, microcrystalline paraffin, ceresin, or vegetable wax including carnauba wax and candelilla wax.

5. The oil-in-water cosmetic composition according to claim 1, wherein,

the inorganic particles are one or more selected from the group consisting of silica, mica, sericite, titanium dioxide, iron oxide, zinc oxide, synthetic mica, aluminum oxide, boron nitride, polymethyl methacrylate, polymethyl silsesquioxane, and polypropyl silsesquioxane.

6. The oil-in-water cosmetic composition according to claim 1, wherein,

the oleogel is 0.1 to 15 weight percent relative to the total weight of the cosmetic composition.

7. The oil-in-water cosmetic composition according to claim 1, wherein,

the polyurethane polymer is 0.01 to 1 weight percent relative to the total weight of the cosmetic composition, the amino acid compound is 0.05 to 5 weight percent relative to the total weight of the cosmetic composition, and the wax is 0.1 to 5 weight percent relative to the total weight of the cosmetic composition.

8. The oil-in-water cosmetic composition according to claim 1, wherein,

the inorganic particles are present in an amount of 1 to 10 weight percent relative to the total weight of the cosmetic composition.

9. The oil-in-water cosmetic composition according to claim 1, wherein,

the gelled oil adsorbed by the inorganic particles is dispersed in the aqueous phase in the absence of a surfactant.

10. The oil-in-water cosmetic composition according to claim 1, wherein,

the aqueous phase further comprises an aqueous phase thickener.

11. The oil-in-water cosmetic composition according to claim 10, wherein,

the aqueous phase thickener comprises more than one selected from the group consisting of cellulose gum, hydroxyethyl cellulose, gellan gum, hydroxypropyl starch phosphate, sodium polyacrylate grafted starch, xanthan gum, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, polyacrylate-13, acrylic ester/C10-30 alkyl acrylate cross-linked polymer, carbomer, sodium polyacrylate and sodium acrylate copolymer.

12. The oil-in-water cosmetic composition according to claim 10, wherein,

the gelled oil adsorbed by the inorganic particles is dispersed in an aqueous phase, which is formed with a network including a three-dimensional network of chain structures by an aqueous phase thickener.

13. The oil-in-water cosmetic composition according to claim 1, wherein,

the polyurethane polymer is an HDI/trimethylol hexyl lactone cross-linked polymer, the amino acid compound is dibutyl lauroyl glutamine and dibutyl iso Xin Xiangu ammonia amide, the wax is microcrystalline paraffin, and the inorganic particles are silicon dioxide.

14. The oil-in-water cosmetic composition according to claim 1, wherein,

the oil includes at least one selected from the group consisting of vegetable oil, mineral oil, hydrocarbon oil, ester oil, silicone oil, and synthetic oil.

15. A method for preparing an oil-in-water cosmetic composition, comprising:

step (a) of preparing a first aqueous phase portion comprising an aqueous phase thickener;

step (B) of preparing an oil phase portion by mixing an oil gelling agent, inorganic particles and oil with stirring, the oil gelling agent comprising a polyurethane polymer, an amino acid compound and a wax; and

and (C) stirring and mixing the first water phase part and the oil phase part.

16. The method for preparing an oil-in-water cosmetic composition according to claim 15, further comprising, after the steps (a) to (C):

a step (D) of adding a second aqueous phase portion containing a neutralizing agent to the stirred mixture of the step (C) and mixing; and

and (E) adding an additive part containing a perfume to the mixture prepared in the step (D) and mixing the mixture, and cooling the mixture.

17. The method for preparing an oil-in-water cosmetic composition according to claim 15, comprising:

step (A), mixing an aqueous phase thickener, a humectant and a preservative, and mixing and stirring at a speed of 1000rpm to 3000rpm for 3 minutes to 15 minutes at a temperature of 60 ℃ to 90 ℃ to prepare a first aqueous phase part;

mixing an oil gel, inorganic particles and oil, and heating, stirring and mixing at a temperature of 60-150 ℃ to prepare an oil phase part, wherein the oil gel comprises a polyurethane polymer, an amino acid compound and wax; and

and (C) mixing the first aqueous phase part and the oil phase part with stirring at a speed of 1500rpm to 3000rpm for 3 minutes to 15 minutes.