Oil-in-water emulsion type cosmetic composition having water resistance and easy cleaning

Abstract

The present invention relates to an oil-in-water emulsion-type cosmetic composition, and more particularly, to an oil-in-water emulsion-type cosmetic composition, which has water resistance in daily life, is not easily washed off by sweat or water after being applied to the skin, can be maintained, can be easily cleaned with only one wash during cleaning, and does not cause strong irritation to the skin. In addition, compared with single use of one film-forming agent, when two specific film-forming agents are used in a mixed manner, higher water resistance and cleaning degree as well as soft use feeling can be exhibited.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsion cosmetic composition. More specifically, after being applied to the skin, the cosmetic composition has water resistance in daily life and is not easily washed off by sweat or water, and can be maintained. When washing, it can be easily washed with just one wash and will not cause strong irritation to the skin. Background Art

[0002] In order to protect the skin from the increasingly strong ultraviolet rays and to protect the skin from the ultraviolet rays entering from indoor windows, the use of sunscreen has become an indispensable part of daily life. In addition, as people of all ages and genders have recently become more concerned about their appearance, the interest in beauty or cosmetics has been growing for both women and men.

[0003] Sunscreen cosmetics are cosmetics that protect the skin from UV rays. They are easy to wash off when they have low or no water resistance. However, considering the characteristics of products that are often used in summer, they are easily wiped off by sweat or water, which makes it difficult to play the role of sunscreen. In addition, in color cosmetics with sunscreen effects, if the water resistance is low, the ability to maintain skin color is reduced. If the water resistance is too strong, multiple steps of washing are required, which may irritate the skin.

[0004] Therefore, it is necessary to develop a cosmetic composition having an ideal sunscreen effect, which has daily water resistance that is not easily removed by water and sweat, and has easy-to-clean properties.

[0005] In order to solve these problems, the present inventors have studied and completed a cosmetic composition which has water resistance that is not easily removed by sweat and water in daily life and can be easily washed off with only a simple face wash. Summary of the invention

[0006] Technical issues

[0007] In order to solve the above problems, the present invention aims to provide an oil-in-water emulsion type cosmetic composition having both water resistance and easy washing properties which are difficult to satisfy simultaneously.

[0008] Technical Solution

[0009] The present inventors prepared an oil-in-water emulsion cosmetic composition comprising a polymer and a film-forming agent, and confirmed that it is possible to realize a cosmetic composition having both water resistance to sweat and water in daily life and excellent cleansing properties.

[0010] In view of this, the present invention provides an oil-in-water emulsion cosmetic composition, which comprises: a polymer; and a film former.

[0011] In the present invention, the polymer is one or more substances selected from acrylates / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyl taurate / VP copolymer, carbomer, sodium polyacrylate, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium polyacryloyldimethyl taurate, ammonium acryloyldimethyl taurate / VP polymer and ammonium acryloyldimethyl taurate / beheneth-25 methacrylate crosspolymer; and may preferably be acrylates / C10-30 alkyl acrylate crosspolymer.

[0012] In the present invention, the film former is selected from PPG-17 / IPDI / DMPA copolymer, styrene / acrylate copolymer, acrylate copolymer, trimethylsiloxysilicate, maleated soybean oil glyceryl / octyl dodecanol ester (MaleatedSoybeanOilGlyceryl / Octyldodeca nol Esters), VP / hexadecene copolymer, VP / eicosene copolymer and VP / acrylate / lauryl methacrylate copolymer. One or more substances; preferably, it can be PPG-17 / IPDI / DMPA copolymer, styrene / acrylate copolymer, acrylate copolymer, or a combination of PPG-17 / IPDI / DMPA copolymer and acrylate copolymer. In the present invention, when the film former is a combination of two selected from PPG-17 / IPDI / DMPA copolymer, styrene / acrylate copolymer and acrylate copolymer, the composition of the combined film former can be 1:0.5 to 1:2.5.

[0013] In the present invention, the weight ratio of the polymer to the film former may be 1:2.5 to 1:4, preferably, 1:3 to 1:3.5.

[0014] In the present invention, the content of the polymer may be 0.1 wt% to 0.25 wt%, preferably 0.1 wt% to 0.2 wt%, based on the total weight of the cosmetic composition. If the polymer is less than 0.1 wt%, abnormal emulsification stability may occur with decreased viscosity, and if it exceeds 0.25 wt%, the user's preference may be reduced due to a sticky feeling during use.

[0015] In the present invention, the content of the film former may be 0.4 to 0.6 wt %, preferably 0.45 to 0.55 wt %, based on the total weight of the cosmetic composition. If the film former is less than 0.4 wt %, the film is not formed sufficiently, resulting in easy wiping off, and if it exceeds 0.6 wt %, the film former may clump, fall off, or the feeling of use may be poor.

[0016] In the present invention, the cosmetic composition may further comprise one or more cosmetic ingredients selected from organic sunscreens, oils, emulsifiers, colorants and aqueous phase additives, but is not limited thereto, and any ingredient that can be used to prepare cosmetics using an emulsion cosmetic composition known in the art may be used.

[0017] In the present invention, the cosmetic composition can be used to prepare foundation, primer, concealer powder, contour cream, eye shadow, blush, highlighter powder or sunscreen products. The above disclosed products can be prepared according to known methods.

[0018] Beneficial Effects

[0019] The beneficial effect of the oil-in-water emulsion cosmetic composition according to the present invention is that it is not easily washed away by sweat due to its water resistance and can maintain its efficacy. At the same time, due to its excellent cleansing ability, it can be easily washed with just one wash, which can prevent skin irritation and damage caused by using too much cleaning products or multiple washes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The graph shows the results of in vitro cleanliness tests of Examples of the present invention.

[0021] Figure 2 and 3 The graph shows the results of in vivo water resistance tests of the examples of the present invention.

[0022] Figure 4 The graph shows the results of in vivo cleaning tests of the examples of the present invention. DETAILED DESCRIPTION

[0023] Below, embodiments of the present invention will be described in more detail. However, the present invention is not limited to the embodiments described in this specification, and can be implemented in other forms. It should be understood that the purpose of this specification providing embodiments is to make the disclosure more thorough and complete, and to fully convey the concept of the present invention to those skilled in the art. In the specification, the same reference numerals represent the same features.

[0024] [Preparation Example 1] Comparative Examples and Examples Prepared According to Different Polymer Types

[0025] The oil-in-water sunscreens of Examples 1 to 3 were prepared according to the formulations shown in Table 1 below.

[0026] First, after weighing raw material 1 (purified water) and raw material 2 (water phase additive) in a main beaker, raw material 3 (polymer) was dispersed using an AGI mixer and heated to 70 to 80°C.

[0027] In another beaker 1, raw material 4 (organic sunscreen), raw material 5 (oil), and raw material 6 (emulsifier) ​​were weighed and heated to 80 to 85°C to dissolve.

[0028] While heating, raw material 7 (colorant) is dispersed in another beaker 2 .

[0029] After confirming that the mixture in Beaker 1 is completely dissolved, slowly add it to the main beaker for emulsification.

[0030] After the emulsification is completed, the main beaker is cooled to 45° C., and the raw material 7 (colorant) dispersed in the beaker 2 is added to the main beaker cooled to 45° C. and dispersed.

[0031] When dispersion is complete, cool to 30°C.

[0032]

Table 1

[0033]

[0034] [Preparation Example 2] Comparative Examples and Examples are prepared according to different types of polymers and film-forming agents

[0035] Using the three polymers shown in Table 1 and the three resins functioning as water-soluble film formers, an oil-in-water type sunscreen was prepared according to the formulation shown in Table 2 below to find a combination ratio that is easy to wash off.

[0036] First, after weighing raw material 1 (purified water) and raw material 2 (water phase additive) in a main beaker, raw material 3 (polymer) was dispersed using an AGI mixer and heated to 70 to 80°C.

[0037] In another beaker 1, raw material 4 (organic sunscreen), raw material 5 (oil), and raw material 6 (emulsifier) ​​were weighed and heated to 80 to 85°C to dissolve.

[0038] While heating, raw material 7 (colorant) is dispersed in another beaker 2 .

[0039] After confirming that the mixture in Beaker 1 is completely dissolved, slowly add it to the main beaker for emulsification.

[0040] After the emulsification is completed, the main beaker is cooled to 45° C., and the raw material 7 (colorant) dispersed in the beaker 2 is added to the main beaker cooled to 45° C. and dispersed.

[0041] Into the main beaker where dispersion has been completed, raw material 8 (film-forming agent) is added and dispersed.

[0042] When dispersion is complete, cool to 30°C.

[0043]

Table 2

[0044]

[0045]

[0046] [Experimental Example 1] Evaluation of in vitro cleaning degree

[0047] The oil-in-water sunscreens prepared according to the formulations shown in Tables 1 and 2 in Preparation Example 1 and Preparation Example 2 were subjected to a cleaning test. 3 A certain weight is coated on a PMMA plate, and then an in vitro ultraviolet measuring device (290AS) is used to measure and compare the in vitro values ​​before and after cleaning. A certain weight of the dosage form is coated on a PMMA plate and dried for 30 minutes, and then the in vitro (in-vitro) before cleaning is measured. Then, after fixing the plate in a 600ml beaker, 200g of pure water is slowly added, and the AGI mixer is gently operated for 5 minutes. Then, after pouring out the pure water in the beaker, the plate is dried for 30 minutes, and then in vitro measurements are performed to compare the in vitro values ​​before and after cleaning. The measured values ​​of Examples 1 to 3 are shown in Table 3, the measured values ​​of Examples 4 to 15 are shown in Table 4, and the graph of the in vitro (in-vitro) measured values ​​of Examples 1 to 15 is shown in Figure 1 .

[0048] Table 3 shows the in vitro cleanliness results for Examples 1 to 3 (prepared according to the formulations in Table 1).

[0049]

Table 3

[0050]

[0051] Referring to the in vitro values ​​of each example, similar results of a sharp decrease in the values ​​before and after washing were obtained. It can be seen that the formulation with only the polymer added is as easy to wash as the known O / W formulation, and the order of good washing is Example 3, Example 1 and Example 2 (polymer C>polymer A>polymer B).

[0052] Table 4 shows the in vitro cleaning results of the dosage forms (prepared according to the formulations in Table 2) using different types of film-forming agents in Examples 1 to 3.

[0053]

Table 4

[0054]

[0055]

[0056] Compared with Examples 1 to 3 in which the polymer is added alone, the formulations containing the film-forming agent are more difficult to clean. The cleaning degree is in the order of A>C>B according to the film-forming agent.

[0057] When comparing the cleaning degree, Example 3 (formulation containing polymer C) has the highest cleaning degree among the formulations using the polymer alone, but Example 4 (polymer A+film former A) has the highest cleaning degree among the formulations using the combination of the polymer and the film former.

[0058] Considering the feeling of use, stability, cleaning performance, etc. of the dosage form containing polymer A, experiments were conducted with the mixing ratio of film formers A and C, and the experimental examples are Examples 13 to 15. From the experimental results, it can be seen that the cleaning performance varies depending on the combination ratio of the film formers.

[0059] The cleaning performance (SPF) of Examples 1 to 3 in Table 3 was used as a reference (control), and the cleaning performance results of the formulations in which the polymer and the film-forming agent were combined were compared and shown in Table 5.

[0060]

Table 5

[0061]

[0062]

[0063] [Experimental Example 2] Water resistance evaluation for human application

[0064] Referring to the experimental results in Table 5, among the examples with high cleaning degree in each group, when the feel of use, stability, etc. are taken into consideration together, Examples 4, 10 and 13 show the best results. Three panelists were used as subjects to conduct a water resistance test on Examples 4, 10 and 13 and Examples 1 to 3 to confirm the influence of the presence or absence of the film-forming agent on the water resistance. The water resistance test method is as follows. After applying a certain amount of product to the lower limbs of the arms, use a facial measurement instrument (JANUS) to take pictures in ultraviolet mode. After immersion in water for 20 minutes and natural drying for 20 minutes, take the first picture. Repeat the immersion and natural drying once, and then take the second picture. Use the Image-Pro v.10 program to analyze the results of the images taken in ultraviolet mode. The water resistance results are shown in Tables 6 and Figure 2 and Figure 3 .

[0065] From the evaluation results of the water resistance effect, it can be seen that compared with Examples 1 to 3 in which the polymer is added alone, the formulation that also contains a film-forming agent has higher water resistance, and even after immersion in water, the coating of Example 4 maintains more than about 87.5%, the coating of Example 10 maintains more than 93.1%, and the coating of Example 13 maintains more than 88.3%.

[0066]

Table 6

[0067] Before immersion First dip Second immersion Example 1 100％ 69.5％ 68.2％ Example 2 100％ 71％ 64.7％ Example 3 100％ 75.3％ 68.1％ Example 4 100％ 89.5％ 87.5％ Example 10 100％ 94.7％ 93.1％ Embodiment 13 100％ 88.4％ 88.3％

[0068] [Experimental Example 3] Evaluation of cleanliness for human application

[0069] The cleanliness test was conducted on three panelists who had evaluated the water resistance of Examples 4, 10, and 13 in Experimental Example 2. For the cleanliness test, a certain amount of the product was applied to the lower limbs of the arm, and then photographed using a facial measurement device (JANUS) in ultraviolet mode.

[0070] After applying a certain amount of cleaning agent and rubbing 10 times, the surface was washed with water, dried naturally, and then photographed. The images taken under UV mode were analyzed using the Image-Pro v.10 program and are shown in Tables 7 and Figure 4 middle.

[0071] The evaluation results of the cleaning degree in Table 7 are as follows: Example 4 was cleaned by about 73.7%, Example 10 was cleaned by about 82.2%, and Example 13 was cleaned by about 72.3%.

[0072]

Table 7

[0073] Cleanliness(%) Example 4 73.7 Example 10 82.2 Embodiment 13 72.3

[0074] From the evaluation results, it can be seen that Example 10 is excellent in terms of cleaning, but when considering water resistance, feel in use, stability, etc., Example 10, which has too strong adhesion and high astringency in the final feel in use, is not preferred, while in Examples 4 and 13, Example 13 has a soft feel in use and water resistance, and has good adhesion and no resistance in the final feel in use, so it is a preferred combination. As described above, the water-in-oil emulsion type cosmetic composition according to the embodiment of the present invention is water-resistant and easy to clean, and compared with the existing water-in-oil emulsion type formulation, the formulation of the present invention having a combination of a polymer and a film-forming agent has higher water resistance, and the cleaning level is similar to that of the existing water-in-oil emulsion.

[0075] Although the above description is made with reference to the embodiments of the present invention, those skilled in the art can make various modifications and changes to the present invention without exceeding the concept and scope of the present invention as described in the claims of this application. Therefore, if the modified implementation substantially includes the technical features of the claims of the present invention, they should all be deemed to belong to the technical scope of the present invention.

Claims

1. An oil-in-water emulsion cosmetic composition comprising: a polymer; and a film-forming agent.

2. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The polymer is one or more substances selected from acrylate / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyl taurate / VP copolymer, carbomer, sodium polyacrylate, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium polyacryloyldimethyl taurate, ammonium acryloyldimethyl taurate / VP polymer and ammonium acryloyldimethyl taurate / beheneth-25 methacrylate crosspolymer.

3. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The film former is one or more substances selected from PPG-17 / IPDI / DMPA copolymer, styrene / acrylate copolymer, acrylate copolymer, trimethylsiloxysilicate, maleated soybean oil glycerol / octyl dodecanol ester, VP / hexadecene copolymer, VP / eicosene copolymer and VP / acrylate / lauryl methacrylate copolymer.

4. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The weight ratio of the polymer to the film former is 1:2.5 to 1:

4.

5. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The polymer may be included in an amount of 0.1 to 0.25 wt % based on the total weight of the cosmetic composition.

6. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The film former is included in an amount of 0.4 wt % to 0.6 wt % based on the total weight of the cosmetic composition.

7. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The cosmetic composition further comprises one or more cosmetic ingredients selected from organic sunscreens, oils, emulsifiers, colorants and water phase additives.

8. The oil-in-water emulsion cosmetic composition according to claim 1, characterized in that: The cosmetic composition is used for preparing foundation, primer, concealer powder, contour cream, eye shadow, blush, highlighter powder or sunscreen product.

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