TW201703760A - Oil-in-water type cosmetic composition with excellent application - Google Patents

Abstract

The present invention relates to an oil-in-water type cosmetic composition having excellent spreadability and, more specifically, to an oil-in-water type cosmetic composition in which inorganic pigments are dispersed in an oil phase so as to have excellent initial spreadability and continuous spreadability, thereby improving a stiff feeling during use.

Description

Oil-in-water cosmetic composition excellent in application feeling

The present invention provides an oil-in-water cosmetic composition excellent in application feeling, and more particularly, to provide an oil-in-water cosmetic composition having improved hair feel, wherein the cosmetic composition is dispersed in an oil phase by dispersing an inorganic pigment In addition, it is excellent not only in the initial application feeling but also in the continuous application feeling.

In general, in an oil-in-water type cosmetic, there are two cases in which an inorganic pigment having a hiding power is dispersed. This is a case where an inorganic pigment is dispersed in an aqueous phase and a case where it is dispersed in an oil phase.

When the inorganic pigment is dispersed in the aqueous phase, when it is applied to the skin, the moisture will quickly evaporate, leaving only the pigment, which will highlight the dry feeling and the squeaky feeling. Also, when the composition does not adhere to the skin gently and is applied smearly, the composition may not be uniformly applied to the skin, and thus the hiding power of the skin and the hiding power of the enamel may be lowered.

When the inorganic pigment is dispersed in the oil phase, the water is rapidly volatilized in the same manner. However, since the pigment which is wetted by the oil remains, the feeling of hairiness is less than that of the former. Although there are degrees of difference between the two cases, the moisture is rapidly volatilized, so that it has the disadvantage of feeling a sense of use with respect to the initial application feeling.

In the case of a water-in-oil type cosmetic, although the initial application feeling is slightly inferior to that of the oil-in-water type cosmetic, there is no evaporation of water, and the continuous application feeling is excellent, so that it is easy to apply the product to the skin, and conversely, the oil-in-water type cosmetic. In this case, since the continuous application feeling is small, the tail feeling of the hair is unique. Therefore, the oil-in-water type cosmetic is relatively difficult to apply the product evenly to the skin than the water-in-oil type cosmetic, and if it is difficult to apply evenly, the hiding power which is an important attribute of the cosmetic composition for makeup is lowered. The problem.

In order to solve the above problem, Korean Patent Publication No. 2014-0118592 (published on Apr. 10, 2008) provides an oil-in-water cosmetic composition in which an inorganic pigment is dispersed in an oil phase, and in order to improve the feeling of use, a ruthenium gel is used. However, due to the peculiar characteristics of the gel, when the cosmetic is applied to the skin, there is a problem that the user complains of airtightness.

Conventional technical literature

Patent Document 1: Korean Patent Publication 2014-0118592 (2014.10.08. Disclosure)

Technical problem to be solved

In order to minimize the graininess of the inorganic pigment in the oil-in-water cosmetic, and to carry out repeated studies without feeling awkward, soft and refreshing, it has been found that when the inorganic pigment is dispersed in When the oil phase portion contains a low hydrophilic-lipophilic balance (HLB) surfactant, the graininess is reduced, so that a soft feeling of use can be conveyed, and not only uniform application but also a refreshing feeling can be imparted. Thus, the present invention has been completed.

Therefore, an object of the present invention is to provide a cosmetic composition for an oil-in-water type makeup which is excellent in hiding power while having a soft feeling and a refreshing feeling.

Technical means

In order to achieve the above object, the present invention provides an oil-in-water cosmetic composition comprising a water phase portion and an oil phase portion: an aqueous phase portion comprising an aqueous phase thickener; and an oil phase portion comprising an inorganic pigment And a low HLB surfactant having an HLB value of 1 to 9, and optionally a high HLB surfactant having an HLB value of 10 or more.

Beneficial effect

By dispersing the inorganic pigment in the oil phase, the composition of the present invention is excellent not only in the initial application feeling but also in the continuous application feeling, thereby improving the feeling of use of the hair strand and by using a low HLB surface. The use of an active agent provides a refreshing feeling of use.

The present invention provides an oil-in-water cosmetic composition in which an inorganic pigment is dispersed in an oil phase and a low HLB surfactant having an HLB value of 1 to 9 is simultaneously used, and the cosmetic not only maintains the advantage as an oil-in-water cosmetic. It has an excellent initial smear, and it also makes it possible to achieve a continuous smear like a water-in-oil cosmetic.

In general, the feeling of application of the oil-in-water cosmetic is drastically lowered (Fig. 1), but as shown in Fig. 2, the present invention is characterized in that the smear feeling gradually decreases over time.

The cosmetic of the present invention consists essentially of an aqueous phase portion comprising an aqueous phase thickener; and an oil phase portion comprising an inorganic pigment and a low HLB surfactant, and optionally a high HLB surfactant.

In the composition of the present invention, the aqueous phase portion accounts for 40% by weight to 70% by weight based on the total weight of the composition, and contains water, a humectant and the like. The humectant is not particularly limited as long as it contains a moisturizing component, and for example, a polyhydric alcohol such as butylene glycol can be used.

The aqueous thickener contained in the aqueous phase portion is a raw material having a certain viscosity to the cosmetic, and is not particularly limited as long as it can enhance the viscosity of the aqueous phase portion. For example, a polyacrylate may be used. One or more raw materials of natural gums, carbopol polymers, and the like. The aqueous phase thickener used in the present invention is used in an amount of a desired cosmetic capable of producing a risk of reducing the total phase, that is, an amount of from 15,000 CPS to 50,000 CPS, and may be between about 0.5% by weight and 2% by weight. Use different amounts. When the viscosity is less than 15000 CPS, the dosage form cannot be stably maintained, and therefore it is not preferable. When the viscosity exceeds 50,000 CPS, the feeling of use of the hair strand exceeds the soft feeling of use of the present invention, which is not preferable.

In the oil phase portion of the present invention, as the oil, an ester such as eucalyptus oil such as cyclopenta-dimethyloxane, phenyl polytrimethyl decane or polydimethyl siloxane or dioctyl carbonate is contained. Oils and the like, and various types and amounts can be used depending on the viscosity and feeling of use of the cosmetics. In the present invention, an oil in the range of 10% by weight to 30% by weight may be used with respect to the total weight of the composition.

The inorganic pigment used in the present invention may be titanium dioxide, zinc oxide, iron oxide, mica, cerium oxide, talc, boron nitride or the like, and may be used depending on the ultraviolet shielding function, hiding power, color and smear of the composition. Different inorganic pigments. The composition of the present invention contains from 0.5% by weight to 15% by weight of the inorganic pigment based on the total weight of the composition. When the content is less than 0.5% by weight, it is difficult to achieve the hiding function of the makeup, and when the content exceeds 15% by weight, it is difficult to disperse the inorganic pigment in the oil phase portion. Further, the present invention is characterized in that it is difficult to disperse in the oil phase portion due to the particle property of the inorganic pigment, but the inorganic pigment can be dispersed in the oil phase portion without undergoing a lipophilic procedure such as coating.

The oil phase portion of the present invention contains a low HLB surfactant in order to have a gentle continuous application feeling. The HLB value of the surfactant used at this time is preferably from 1 to 9. In the composition of the present invention, as the low HLB surfactant, a PEG/PPG-10/1 polydimethyl siloxane (PEG/PPG-10/1 DIMETHICONE), PEG-10 polydimethyl hydrazine may be used. One or more kinds of anthraquinone surfactants such as PEG-10 DIMETHICONE and Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone, but It is not limited to this. From 0.6% to 3% by weight of the low HLB surfactant is used relative to the total weight of the composition. When less than 0.6% by weight of the surfactant is used, the degree of exerting the desired effect is minimal, and when more than 3% by weight of the low HLB surfactant is used, the whole phase is detached, so that the dosage form is destroyed. So not good.

The high HLB surfactant used in the present invention is used for the purpose of stabilizing an oil-in-water cosmetic, and has an HLB value of 10 or more, preferably 10 to 18. As the surfactant, a PEG ester (PEG ESTER) type selected from the group consisting of PEG-100 STEARATE/GLYCERYL STEARATE, including methoxy PEG-114/poly ε, may be used. - one or more surfactants of a PCG-based or PEG-SORBITAN-based surfactant such as caprolactone (METHOXY PEG-114/POLYEPSILON CAPROLACTONE), but is not limited thereto. A high HLB surfactant in the range of 1.5% to 7% by weight is used relative to the total weight of the composition. When less than 1.5% by weight of the surfactant is used, the oil-in-water cosmetic dosage form cannot be formed, so that there is a risk of separation of the oil phase portion and the water phase portion, and when more than 7% by weight of the surfactant is used, it cannot be realized. A refreshing feeling of use as an object of the present invention.

The oil-in-water cosmetic composition of the present invention may further include a preservative, a fragrance, and the like which are used in cosmetics in the art without departing from the object of the present invention, but is not limited thereto.

The oil-in-water cosmetic composition of the present invention can be formulated by a cosmetic for makeup such as sunscreen agents, a makeup foundation, a foundation cream, a composition for whitening, wrinkle improvement, and the like, but It is not limited to this.

detailed description

[Reference Example 1] Preparation of Examples and Comparative Examples

The oil-in-water type cosmetics of Examples 1 to 3 and Comparative Examples 1 and 2 were prepared by the compositions of Table 1 below, and the water-in-oil type cosmetic composition of Comparative Example 3 was prepared using the composition of Table 2. Comparative Example 1 is an example in which the inorganic pigment is dispersed in the aqueous phase portion, and the oil phase does not contain a low HLB surfactant. In Comparative Example 2, the inorganic pigment is dispersed in the oil phase while the silicone elastomers are added. And 0.6% by weight of a low HLB surfactant was used. Examples 1, 2, and 3 are cosmetics in which an inorganic pigment is dispersed in an oil phase, and each contains 0.6% by weight, 1% by weight, and 3% by weight of a low-HLB surfactant. Finally, Comparative Example 3 is a water-in-oil type cosmetic. The low HLB surfactant used at this time was lauryl PEG-9 polydimethyl oxirane polydimethyl siloxane.

Table 1

Table 2

[Test Example 1] Evaluation of feeling of use

In order to understand the degree of feeling of use of each of the cosmetics prepared in Examples 1 to 3 and Comparative Examples 1 to 3, the feeling of use (smear feeling and finishing feeling at the time of initial application) was evaluated by an expert group test, and the results were shown. In Table 3 below. The participating panelists are 9 women in the 20-30 age group. "Excellent initial application" means that it can be applied without difficulty and gentleness when applying makeup on the skin. For this project, the higher the score, the softer and easier to push open, and the lower the score, the more smeared the smear. (1 point: hairpin is difficult to apply; 2 points: slightly smeared; 3 points: normal; 4 points: softly applied; 5 points: very softly applied). "Telesure feeling" means a feeling of use that is felt when it is judged that it has been sufficiently absorbed after applying the cosmetic on the skin. For this project, the higher the score, the more gentle the smear of continuity, and the lower the score, the lower the smear of the scent due to the evaporation of water, and the feeling of squeakiness that is instantaneous. (1 point: very hairy and difficult to evenly close; 2 points: slightly bun; 3 points: normal; 4 points: soft and natural finish; 5 points; soft and continuous closing).

Table 3 <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> </td><td> Comparative Example 1 </td><td> Comparative Example 2 </td><td> Comparative Example 3 </td><td> Example 1 </td><td> Example 2 </td><td> Example 3 </td></tr>< Tr><td> Initial sensation </td><td> 4.8 </td><td> 4.2 </td><td> 3.0 </td><td> 4.1 </td><td> 4.1 </ Td><td> 4.1 </td></tr><tr><td> Finishing </td><td> 2.4 </td><td> 2.6 </td><td> 4.1 </td> <td> 3.6 </td><td> 3.9 </td><td> 4.0 </td></tr></TBODY></TABLE>

As shown in the above Table 3, in all of Comparative Examples 1 to 2 and Examples 1 to 3, it was confirmed that the initial application feeling was easy to push open and gently applied. In Comparative Example 3, the initial application feeling was inferior to that of the oil-in-water type cosmetic, but conversely, the finishing feeling was the softest application. However, in Comparative Example 1 in which the inorganic pigment was dispersed in the aqueous phase and Comparative Example 2 in which the inorganic pigment was dispersed in the oil phase and the ruthenium elastomer was contained, it was confirmed that the hairpin was shorter than the initial easy opening. The finishing touch is more obvious.

Further, it was confirmed that the tailing feeling of the hairs of Examples 1 to 3 in which the inorganic pigment was dispersed in the oil phase and the small amount of the low-HLB surfactant was simultaneously used was greatly improved, and with the low HLB surfactant The increase in the content thereof also increases the degree of soft tailing feeling. In particular, it can be judged that the case of Example 3 has the softest continuous spread feeling.

From this result, it can be concluded that the content of the low HLB surfactant and the soft tailing feeling are proportional.

[Test Example 2] Rheological evaluation of the composition

When the composition of the present invention is applied to the skin, in order to observe how the dosage form changes, rheological evaluation is performed by measuring the rate of change of shear rate and viscosity (rheometer, manufacturing company: A. INSTRUMENT. ENGLAND, model: AR2000). The results are shown in Fig. 3.

The case of the conventional oil-in-water type composition (Comparative Example 1; blue diamond shape) can be explained by the fact that since the viscosity according to the shear rate is the largest, the initial feeling of application is excellent, but the inclination is drastically lowered, so that it is fast. There is a feeling of ending in the hair. However, the case of the composition of the present invention (Example 2; green triangle) can be explained by the fact that the viscosity of the shear rate, that is, the inclination is gentle, compared with the oil-in-water type composition (blue diamond). Therefore, it is possible to give a soft finishing touch.

Comparing the late viscosity changes of the composition of the present invention and the water-in-oil type composition (Comparative Example 3; red square), it can be presumed that they have similar characteristics, i.e., have similar inclinations, thereby exhibiting a soft feeling of application.

[Experimental Example 3] Evaluation of the stability of cosmetics

In order to confirm the stability of the composition of the present invention, the composition of Example 2 was observed with an optical microscope (Polorizing Microscope, manufacturing company: NIKON, model: LV100POL), and the results are shown in Fig. 4.

It was confirmed that even if 0.6% of the low-HLB surfactant was contained, the system was stably formed, and the inorganic pigment was uniformly dispersed in the oil phase portion.

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Fig. 1 is a graph showing the degree of application of the oil-in-water composition and the water-in-oil composition as a function of time.

Figure 2 is a graph showing the degree of smear of the composition of the present invention as a function based on time.

Fig. 3 is a graph showing the results of rheological evaluation of how the dosage form changes when the composition is applied to the skin.

Fig. 4 is a view showing the results of observing the composition of Example 2 with an optical microscope.

Claims (13)

An oil-in-water cosmetic composition comprising an aqueous phase portion and an oil phase portion, an aqueous phase portion comprising an aqueous phase thickener; and an oil phase portion comprising an inorganic pigment and a hydrophilic-lipophilic balance ( HLB) is a low HLB surfactant having a value of 1 to 9, and optionally a high HLB surfactant having an HLB value of 10 or more. The cosmetic composition according to claim 1, wherein the aqueous phase portion accounts for 40 to 70% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the aqueous phase tackifier is contained in an amount capable of producing a composition having a viscosity of from 15,000 CPS to 50,000 CPS. The cosmetic composition of claim 1, wherein the inorganic pigment is contained in an amount of from 0.5% by weight to 15% by weight based on the total weight of the composition. The cosmetic composition of claim 1, wherein the low HLB surfactant has an HLB value of 4 to 5. The cosmetic composition of claim 1, wherein the low HLB surfactant is included in an amount of from 0.6% by weight to 3% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the low HLB surfactant is selected from the group consisting of PEG/PPG-10/1 polydimethyl siloxane (PEG/PPG-10/1 DIMETHICONE), PEG One or more of -10 polydimethyl methoxy oxane (PEG-10 DIMETHICONE) and Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone. The cosmetic composition of claim 1, wherein the high HLB surfactant has an HLB value of 10-18. The cosmetic composition of claim 1, wherein the high HLB surfactant is included in an amount of from 1.5% by weight to 7% by weight based on the total weight of the composition. The cosmetic composition of claim 1, wherein the continuous application feeling of the composition is improved. The cosmetic composition according to claim 1, wherein the composition is a makeup composition. The cosmetic composition of claim 11, wherein the composition is formulated in the form of a barrier cream, a foundation or a sunscreen. A barrier cream for preventing ultraviolet rays, which is made of the composition according to any one of claims 1 to 12.