Nanoemulsion cosmetic composition containing amphipathic xyloside-based emulsifier for improving formulation stability and moisturizing skin

Abstract

The present invention relates to a water-in-oil type nanoemulsion cosmetic composition containing an amphipathic xyloside-based emulsifier. Specifically, the present invention provides a water-in-oil type nanoemulsion cosmetic composition, which uses an emulsifier having higher affinity for water than a conventional water-in-oil type emulsifier to strongly hold an aqueous phase, thereby implementing a stable formulation and improving moisturizing capacity.

Description

Nanoemulsion cosmetic composition for improving formulation stability and moisturizing the skin containing an amphiphilic xyloid-based emulsifier

[0001] This patent application claims priority to Korean Patent Application No. 10-2024-0174469 filed with the Korean Intellectual Property Office on November 29, 2024, and the disclosures of said patent application are incorporated herein by reference.

[0002] The present invention relates to a water-in-oil cosmetic composition comprising an amphiphilic xyloside-based emulsifier, and more specifically, to a nanoemulsion cosmetic composition that uses an emulsifier with a higher affinity for water than conventional water-in-oil emulsifiers to strongly hold the aqueous phase, thereby improving formulation stability and moisturizing power.

[0003] An emulsion refers to a system in which one of the liquids that do not dissolve in each other, such as water and oil, is dispersed as fine particles in another liquid. Generally, emulsions are classified into microemulsions and nanoemulsions depending on the particle size. In this case, creating an emulsion requires an aqueous component, an oil component, and an appropriate emulsifier according to their composition. In the case of nanoemulsions with a particle size of 500 nm or less, stability over time is significantly limited.

[0004] Emulsions are classified into oil-in-water (O / W) and water-in-oil (W / O) types, in which an oil phase substance is dispersed as small particles within an oil phase substance. The dispersion of each substance depends on the HLB value of the emulsifier. The HLB value of an emulsifier is an indicator representing the balance between hydrophilicity and lipophilicity, ranging from 0 to 20. Generally, a higher HLB value indicates greater hydrophilicity, while a lower HLB value indicates greater lipophilicity; more specifically, an HLB value of 8 to 18 makes it easy for an oil-in-water emulsion to form, while an HLB value of 3 to 6 makes it easy for a water-in-oil emulsion to form.

[0005] In conventional technology, water-in-oil emulsions produced through a general emulsification process have large particle sizes, making it difficult to penetrate the skin's lipid layer and resulting in low skin absorption. Water-in-oil emulsions produced through a nano-emulsification process improve this problem, but the formulation stability decreases. Additionally, as the proportion of the aqueous phase increases, the emulsion state of the water-in-oil emulsion becomes unstable, making it difficult to contain a large amount of aqueous phase; consequently, there is a disadvantage of insufficient skin moisturizing power during use.

[0006] Against this backdrop, the inventors conducted experiments to prepare a cosmetic composition that is stable in formulation and has excellent skin moisturizing power. Accordingly, they developed a water-in-oil nanoemulsion cosmetic composition that uses an emulsifier with a higher affinity for water than conventional water-in-oil emulsifiers to strongly hold the aqueous phase, thereby improving formulation stability and moisturizing power.

[0007] The object of the present invention is to provide a water-in-oil type nanoemulsion cosmetic composition comprising an amphiphilic xyloid-based emulsifier.

[0008] The present invention relates to a water-in-oil type cosmetic composition having a stable formulation and excellent skin moisturizing properties.

[0009] According to the prior art regarding conventional water-in-oil emulsion cosmetic compositions, there is a problem of low formulation stability of the nanoemulsion itself, and furthermore, as the proportion of the aqueous phase of the water-in-oil emulsion increases, the emulsification state becomes unstable, making it difficult to contain a large amount of aqueous phase, resulting in insufficient skin moisturizing power during use. On the other hand, according to the present invention, unlike the prior art, an emulsifier with a higher affinity for water than conventional water-in-oil emulsifiers is used to strongly hold the aqueous phase, thereby improving formulation stability and moisturizing power. Specifically, the present invention uses an amphiphilic xyloside emulsifier with a high affinity for water, which can improve formulation stability that was lacking when only polyglyceryl-based emulsifiers were used.

[0010] The present invention will be described in more detail below.

[0011]

[0012] One aspect of the present invention is a water-in-oil type nanoemulsion cosmetic composition comprising an amphiphilic xyloid-based emulsifier.

[0013] The term “amphiphilicity” in this specification refers to a property in which hydrophobic and hydrophilic groups coexist and have an affinity for both polar and non-polar substances.

[0014] The term “xyloside” in this specification refers to a type of glycoside extracted from xylose.

[0015] The term “xyloside-based emulsifier” in this specification refers to the use of xyloside, a type of glycoside extracted from xylose, for emulsification purposes.

[0016] In the present invention, the amphiphilic xyloside emulsifier can improve formulation stability, which was lacking when only polyglyceryl-based emulsifiers were used.

[0017] In the present invention, the amphiphilic xyloid emulsifier can improve formulation stability, which was lacking when only a sorbitan-based emulsifier was used.

[0018] In the present invention, the amphiphilic xyloxide-based emulsifier may be one or more selected from the group consisting of octyldodecylxyloxide, caprylyl / caprylxyloxide, and caprylyl / caprylglucoside / xyloxide, but is not limited thereto.

[0019] In the present invention, the HLB value of the amphiphilic xyloside-based emulsifier may be 3.5 to 7.5, 4 to 7, 4.5 to 6.5, 5 to 6, for example 5.5, but is not limited thereto.

[0020] In the present invention, the amphiphilic xyloside-based emulsifier is present in an amount of 0.1 to 3 wt%, 0.1 to 2.5 wt%, 0.1 to 2 wt%, 0.1 to 1.5 wt%, 0.1 to 1 wt%, 0.1 to 0.5 wt%, 0.1 to 0.4 wt%, 0.1 to 0.3 wt%, 0.2 to 3 wt%, 0.2 to 2.5 wt%, 0.2 to 2 wt%, 0.2 to 1.5 wt%, 0.2 to 1 wt%, 0.2 to 0.5 wt%, 0.2 to 0.4 wt%, 0.2 to 0.3 wt%, 0.25 to 3 wt%, 0.25 to 2.5 wt%, 0.25 to 2 wt%, 0.25 to It may be included in 1.5% by weight, 0.25 to 1% by weight, 0.25 to 0.5% by weight, 0.25 to 0.4% by weight, 0.25 to 0.3% by weight, for example, 0.25% by weight, but is not limited thereto. If the amphiphilic xyloside-based emulsifier is less than 0.1% by weight or exceeds 3% by weight relative to the total cosmetic composition, the formulation may become unstable or the skin moisturizing effect may be reduced.

[0021] In the present invention, the cosmetic composition may further include a non-xylloside emulsifier, specifically may further include one or more of a polyglyceryl-based emulsifier and a sorbitan-based emulsifier, and more specifically may further include one or more selected from the group consisting of polyglyceryl-10 pentaisostearate, polyglyceryl-6 polyricinoleate, polyglyceryl-4 isostearate, and sorbitan isostearate, but is not limited thereto. Preferably, a polyglyceryl-based emulsifier and a sorbitan-based emulsifier may be used together.

[0022] In the present invention, the polyglyceryl-based emulsifier may be one or more selected from the group consisting of polyglyceryl-10 pentaisostearate, polyglyceryl-6 polyricinoleate, polyglyceryl-4 isostearate, polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-3 methylglucose distearate and polyglyceryl-10 isostearate, but is not limited thereto.

[0023] In the present invention, the sorbitan-based emulsifier may be one or more selected from the group consisting of sorbitan isostearate, sorbitan stearate, sorbitan laurate, sorbitan sesquioleate, sorbitan oliveate, sorbitan oleate, sorbitan cocoate, sorbitan palmitate, sorbitan caprylate, sorbitan undecylenate, sorbitan fatty acid ester, and derivatives thereof, but is not limited thereto.

[0024] In the present invention, the cosmetic composition may comprise the non-xylloside emulsifier in an amount of 5 to 20 wt%, 5 to 17 wt%, 5 to 16 wt%, 5 to 15 wt%, 10 to 20 wt%, 10 to 17 wt%, 10 to 16 wt%, 10 to 15 wt%, 12 to 20 wt%, 12 to 17 wt%, 12 to 16 wt%, 12 to 15 wt%, 13 to 20 wt%, 13 to 17 wt%, 13 to 16 wt%, 13 to 15 wt%, for example, 14 wt%, but is not limited thereto.

[0025] In the present invention, the cosmetic composition may comprise a total emulsifier in an amount of 5 to 20 wt%, 5 to 17 wt%, 5 to 16 wt%, 5 to 15 wt%, 10 to 20 wt%, 10 to 17 wt%, 10 to 16 wt%, 10 to 15 wt%, 12 to 20 wt%, 12 to 17 wt%, 12 to 16 wt%, 12 to 15 wt%, 13 to 20 wt%, 13 to 17 wt%, 13 to 16 wt%, 13 to 15 wt%, for example, 14.25 wt%, but is not limited thereto.

[0026] In the present invention, the total HLB value of the entire emulsifier may be 3.5 to 7.5, 4 to 7, 4.5 to 6.5, or 5 to 6, but is not limited thereto.

[0027] In the present invention, the cosmetic composition may additionally include one or more selected from the group consisting of moisturizers, preservatives, emulsifying aids, thickeners, and chelating agents, but is not limited thereto.

[0028] In the present invention, the humectant may include a polyol, specifically one or more selected from the group consisting of glycerin, butylene glycol, and propanediol, but is not limited thereto.

[0029] In the present invention, the humectant may be included in an amount of 5 to 30 weight%, 5 to 25 weight%, 5 to 20 weight%, 5 to 15 weight%, for example, 10 weight%, but is not limited thereto.

[0030] In the present invention, the preservative may be one or more selected from the group consisting of 1,2-hexanediol, pentylene glycol, ethylhexylglycerin, and caprylyl glycol, but is not limited thereto.

[0031] In the present invention, the preservative may be included in an amount of 0.1 to 2 weight%, 0.1 to 1.5 weight%, 0.5 to 2 weight%, 0.5 to 1.5 weight%, for example, 1 weight% relative to the total cosmetic composition, but is not limited thereto.

[0032] In the present invention, the cosmetic composition is a water-in-oil (W / O) cosmetic composition and may include an oil phase as the outer phase and an aqueous phase as the inner phase.

[0033] In the present invention, the oil phase may include one or more selected from the group consisting of oil, emulsifiers, and emulsification aids, but is not limited thereto.

[0034] In the present invention, the oil phase may be 30 to 50 weight%, 30 to 45 weight%, 30 to 40 weight%, 35 to 50 weight%, 35 to 45 weight%, 35 to 40 weight%, for example, 39 weight%, but is not limited thereto. If the oil phase is less than 30 weight%, the viscosity of the composition decreases, which may accelerate the phenomenon of separation of the emulsion formulation, and if it exceeds 50 weight%, the viscosity of the composition increases, which may make it difficult to nano-size the particles.

[0035] In the present invention, the oil may include one or more of hydrocarbon oils, ester oils, and aliphatic oils, and specifically, may be one or more selected from the group consisting of isohexadecane, hydrogenated polydecene, isononyl isononanoate, caprylic / capric triglyceride, ethylhexyl stearate, and octyldodecanol, but is not limited thereto. Specifically, hydrocarbon oils, ester oils, and aliphatic oils may be used together.

[0036] In the present invention, the oil comprises 10 to 50 wt%, 10 to 45 wt%, 10 to 40 wt%, 10 to 35 wt%, 10 to 30 wt%, 10 to 28 wt%, 10 to 26 wt%, 10 to 25 wt%, 15 to 50 wt%, 15 to 45 wt%, 15 to 40 wt%, 15 to 35 wt%, 15 to 30 wt%, 15 to 28 wt%, 15 to 26 wt%, 15 to 25 wt%, 20 to 50 wt%, 20 to 45 wt%, 20 to 40 wt%, 20 to 35 wt%, 20 to 30 wt%, 20 to 28 wt%, 20 to 26 wt%, 20 to It may be 25 weight%, 22 to 30 weight%, 22 to 28 weight%, 22 to 26 weight%, 22 to 25 weight%, for example, 24 weight%, but is not limited thereto.

[0037] In the present invention, the aqueous phase may comprise one or more selected from the group consisting of purified water and a moisturizer, but is not limited thereto.

[0038] In the present invention, the aqueous phase may be 50 to 70 weight%, 50 to 65 weight%, 55 to 70 weight%, 55 to 65 weight%, 60 to 70 weight%, 60 to 65 weight%, for example, 61 weight%, but is not limited thereto. If the aqueous phase is less than 50 weight%, the viscosity of the composition increases, making it difficult to nano-size the particles, and if the aqueous phase exceeds 70 weight%, the viscosity of the composition decreases, which may accelerate the phenomenon of separation of the emulsion formulation.

[0039] In the present invention, the purified water may be 20 to 60 wt%, 20 to 50 wt%, 30 to 60 wt%, 30 to 55 wt%, 30 to 50 wt%, 35 to 60 wt%, 35 to 55 wt%, 35 to 50 wt%, 40 to 60 wt%, 40 to 55 wt%, 40 to 50 wt%, for example, 49 wt%, but is not limited thereto.

[0040] In the present invention, the particle size of the nanoemulsion may be 10 to 500 nm, but is not limited thereto.

[0041] In the present invention, the nanoemulsion may be prepared through a high-pressure emulsification process, but is not limited thereto.

[0042] In the present invention, the high-pressure emulsification process may be performed under a pressure of 100 to 1,000 Bar, for example, 500 Bar, but is not limited thereto.

[0043] In the present invention, the high-pressure emulsification process may be performed 1 to 5 times, for example 3 times, but is not limited thereto.

[0044] In the present invention, the cosmetic composition can be prepared in any formulation conventionally manufactured in the art. For example, it may be an emulsion, skin, moisturizing gel, moisturizing cream, essence, two-step essence, serum, lotion, cream, liquid foundation, or solid foundation formulation, but is not limited thereto. Preferably, it may be an emulsion, moisturizing cream, serum, lotion, cream, or liquid foundation.

[0045] The present invention relates to a water-in-oil type nanoemulsion cosmetic composition comprising an amphiphilic xyloside-based emulsifier, and more specifically, by using an emulsifier with a higher affinity for water than a conventional water-in-oil type emulsifier, it strongly holds the aqueous phase to provide formulation stability and improved moisturizing effect.

[0046] FIG. 1a shows a cosmetic composition with a stable formulation according to one embodiment of the present invention.

[0047] FIG. 1b shows the results of comparing formulation stability according to one embodiment of the present invention.

[0048] Figure 2 shows the results of comparing internal moisturizing power according to one embodiment of the present invention.

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily implement the present invention. Unless otherwise defined, terms used in this specification should be interpreted as generally understood by those skilled in the art.

[0050] The drawings and embodiments of this specification are intended to enable a person skilled in the art to easily understand and practice the invention. Content that may obscure the essence of the invention may be omitted from the drawings and embodiments, and the invention is not limited to the drawings and embodiments.

[0051] Throughout this specification, “%” used to indicate the concentration of a particular substance is (weight / weight)% for solid / solid, (weight / volume)% for solid / liquid, and (volume / volume)% for liquid / liquid, unless otherwise noted.

[0052]

[0053] Preparation Example. Preparation of Examples and Comparative Examples

[0054] Examples 1 to 3 and Comparative Examples 1 and 2 were prepared by varying the content of the amphiphilic xyloside-based emulsifier as shown in Table 1 below. Octyldodecylxylloside was used as the amphiphilic xyloside-based emulsifier.

[0055] Comparative Example 1 Example 1 Example 2 Example 3 Comparative Example 2. Oil Phase Emulsifier Polyglyceryl-10 Penta-isostearate 8.0 8.0 8.0 8.0 8.0 Polyglyceryl-6 Polyricinoleate 4.0 4.0 4.0 4.0 4.0 Sorbitan Isostearate 2.0 2.0 2.0 2.0 2.0 Octyldodecyl Xylloside 0.25 0.5 2.0 5.0 Oil Caprylic / Capric Triglyceride 12.0 12.0 12.0 12.0 12.0 Isononyl Isononanoate 12.0 12.0 12.0 12.0 12.0 Octyldodecanol 0.75 0.75 0.75 0.75 0.75 Aqueous Water Remaining Amount Remaining Amount Remaining Amount Remaining Amount Glycerin 10.0 10.0 10.0 10.0 10.0 Other Additives 2.0 2.0 2.0 2.0 2.0 Total (Unit: Weight%) 100.0 100.0 100.0 100.0 100.0 Average Particle Size (nm) 300 280 280 270 300

[0056] Specifically, the oil phase and water phase components were mixed and heated to 80°C to dissolve the oil phase and water phase, respectively. After slowly adding the water phase to the oil phase, the mixture was stirred at 2500 rpm for 10 minutes using a homogenizer to prepare a water-in-oil general emulsion composition. Subsequently, a water-in-oil nanoemulsion composition was prepared by performing an emulsification process three times using a microfluidizer at a temperature of 30°C and a pressure of 500 bar.

[0057] In Table 1 above, other additives are preservatives, chelating agents, and functional ingredients (niacinamide, adenosine, etc.).

[0058] At this time, when an amphiphilic xyloside-based emulsifier was used alone as an emulsifier, or when only one type from the group consisting of polyglyceryl-based emulsifiers and sorbitan-based emulsifiers was used together with an amphiphilic xyloside-based emulsifier, the degree of stability maintenance or improvement was insufficient compared to when three types of emulsifiers were used together, so it was excluded from the following 'Experimental Example 1. Formulation Stability Evaluation'.

[0059] In addition, if the oil phase exceeds 50% by weight or the aqueous phase is less than 50% by weight, it is difficult to nanoscale the particles even when using a microfluidizer due to the increased viscosity of the composition, and if the oil phase is less than 30% by weight or the aqueous phase exceeds 70% by weight, although the particles can be nanoscaled, the viscosity decreases, which may accelerate the separation of the emulsion formulation.

[0060]

[0061] Experimental Example 1. Evaluation of Formulation Stability

[0062] The formulation stability of Examples 1 to 3 and Comparative Examples 1 and 2 was evaluated. Each water-in-oil nanoemulsion composition was placed under conditions of 4°C, room temperature, 37°C, 45°C, and a cycle (changing the storage temperature to -10°C, 15°C, and 40°C every 8 hours for 3 cycles) for 1 day, 1 week, 2 weeks, and 4 weeks to evaluate the formulation stability, and the results are shown in Table 2, Figures 1a and 1b below. Figures 1a and 1b are photographs taken after the 4-week formulation stability evaluation was completed. In addition, the evaluation criteria are as follows.

[0063] [Evaluation Criteria]

[0064] ◎: The formulation is stable

[0065] △: Formulation is slightly unstable

[0066] X: Formulation is unstable

[0067] Comparative Example 1 Example 1 Example 2 Example 3 Comparative Example 21 Day 4 ℃◎◎◎◎◎ Room Temperature◎◎◎◎◎ 37 ℃◎◎◎◎◎ 45 ℃◎◎◎◎◎ Cycle◎◎◎◎◎ Week 1 4 ℃◎◎◎◎◎ Room Temperature◎◎◎◎◎ 37 ℃△◎◎◎◎ 45 ℃△◎◎◎◎ Cycle△◎◎◎◎ Week 2 4 ℃◎◎◎◎◎ Room Temperature◎◎◎◎◎ 37 ℃△◎◎◎◎ 45 ℃ X◎◎◎ △ Cycle X◎◎◎ △ Week 4 ℃◎◎◎◎◎ Room Temperature◎◎◎◎ 37 ℃ X◎◎◎ △ 45 ℃ X◎◎◎ X Cycle X◎◎◎ X

[0068] As can be seen in Table 2 above, Examples 1 to 3 showed good stability of the formulation even after 4 weeks had passed since preparation. On the other hand, Comparative Example 1 showed unstable formulation after 1 week had passed since preparation, and Comparative Example 2 showed unstable formulation after 2 weeks had passed.

[0069] Through this, it was confirmed that Comparative Example 1, which does not contain an amphiphilic xyloside-based emulsifier, and Comparative Example 2, which contains 5 wt% of an amphiphilic xyloside-based emulsifier, have unstable formulations, while Examples 1 to 3, which contain 0.25 wt%, 0.5 wt%, and 2 wt% of an amphiphilic xyloside-based emulsifier, respectively, have stable formulations for more than 4 weeks (Fig. 1).

[0070]

[0071] Experimental Example 2. Sensory Evaluation

[0072] Examples 1 to 3 and Comparative Examples 1 and 2 were applied to the skin of 20 male and female panelists aged 20 to 40, and the user experience, including spreadability, absorption, moisturizing effect, and overall satisfaction, was evaluated according to the following evaluation criteria, and the results are shown in Table 3 below.

[0073] Among the above criteria, spreadability refers to the sensation of spreading on the skin, indicating the degree to which it applies flexibly without any hedging sensation upon application. Absorption capacity refers to the degree to which the composition has been absorbed into the skin 10 minutes after application. Moisturizing sensation refers to the feeling that the composition is moist on the skin without stickiness, greasiness, or greasiness 10 minutes after application. These three criteria enhance the value of the product as a cosmetic, and in particular, spreadability and moisturizing sensation can be important characteristics of an oil-in-water nanoemulsion cosmetic composition.

[0074] [Evaluation Criteria]

[0075] ◎: Judged as excellent by 15 or more users

[0076] ○: Judged as excellent by 10 to 14 users

[0077] △: Judged as excellent by 9 or fewer users

[0078] Spreadability Absorption Moisturizing Effect Overall Satisfaction Comparison Example 1 ◎◎◎◎ Example 1 ◎◎◎◎ Example 2 ◎◎◎◎ Example 3 ○○◎○ Comparative Example 2 △△◎△

[0079] As can be seen in Table 3 above, Examples 1 to 3 and Comparative Examples 1 and 2 were all evaluated as having excellent moisturizing properties; however, regarding spreadability and absorption, Examples 1, 2 and Comparative Example 1 were judged as excellent by more than 15 users, and Example 2 was also judged as excellent by a majority of users. As a result, Examples 1, 2 and Comparative Example 1 received the highest evaluation in terms of overall satisfaction, followed by Example 3, which also received an excellent evaluation.

[0080]

[0081] Experimental Example 3. Skin Moisture Evaluation

[0082] To evaluate the skin moisturizing effects of Comparative Example 1 and Examples 1 and 2, skin moisturization was evaluated on 5 subjects (aged 26 to 32). A positive control group was used to compare the effects with a water-in-oil type general emulsion (ABC EYE SERUM, Cosmax). To measure the amount of moisture present in the skin epidermis, a corneometer sensor (CK electronic, Germany), which is a machine capable of verifying skin moisturizing power by measuring and quantifying the ionic level of water, was used. Skin moisture content was expressed as skin moisture content %. The test was conducted under conditions of a constant temperature of 22±2 ℃ and a constant humidity (relative humidity) of 40–60%, and the results are shown in Table 4 below.

[0083] (Unit: Skin moisture %) Positive control Comparative Example 1 Example 1 Example 20 hr100.0100.0100.0100.00.5 hrs152.7192.4219.7194.42 hrs114.6156.8174.9153.64 hrs104.9145.6155.4144.78 hrs104.6132.8141.5129.5

[0084] As can be seen in Table 4 above, after 8 hours of application, the skin moisture level of Example 1 increased significantly compared to the positive control, Comparative Example 1, and Example 2. Through this, it was confirmed that the skin moisturizing effect of Examples 1 and 2, which contain amphiphilic xyloside-based emulsifiers, is excellent.

[0085]

[0086] Experimental Example 4. Evaluation of Internal Skin Moisture

[0087] To evaluate the skin moisturizing effect of Example 1, skin moisturization was evaluated against non-application on 5 subjects (aged 26 to 32). To measure the moisture content present in N layers of the skin stratum corneum, an Epsilon (BiOX, UK) device was used, which is capable of verifying skin moisture content by performing tape stripping using a stratum corneum tape (B-SQUAM). At this time, the unit of skin moisture content was expressed in arbitrary units (AU), and the results of the skin moisture content measurement are shown in Table 5 and Figure 2 below.

[0088] Skin layer count 1 2 3 4 5 6 Skin moisture (AU) Unapplied 5.2 5.9 7.4 9.1 10.1 10.6 Example 1 2 5.9 2 4.5 19.4 19.3 17.6 14.9

[0089] As can be seen in Table 5 above and Figure 2 below, it was confirmed that the skin moisture level was higher compared to the unapplied stratum corneum up to 6 layers.

[0090] Through this, it was confirmed that the skin moisturizing effect of Example 1, which contains an amphiphilic xyloid-based emulsifier, was significantly excellent.

Claims

1. A water-in-oil type nanoemulsion cosmetic composition comprising an amphiphilic xyloside-based emulsifier.

2. A cosmetic composition according to claim 1, wherein the amphiphilic xyloside-based emulsifier comprises octyldodecylxyloside.

3. A cosmetic composition according to claim 1, wherein the amphiphilic xyloside-based emulsifier is included in an amount of 0.1 to 3 weight percent relative to the total cosmetic composition.

4. The cosmetic composition of claim 1, wherein the cosmetic composition further comprises one or more selected from the group consisting of polyglyceryl-based emulsifiers and sorbitan-based emulsifiers.

5. A cosmetic composition according to claim 1, wherein the cosmetic composition further comprises one or more selected from the group consisting of polyglyceryl-10 pentaisostearate, polyglyceryl-6 polyricinoleate, polyglyceryl-4 isostearate, and sorbitan isostearate.

6. A cosmetic composition according to claim 1, wherein the particle size of the nanoemulsion is 10 to 500 nm.

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