KR100537266B1 - Solid cosmetic composition in the form of water-in-oil emulsion - Google Patents

Abstract

The present invention relates to a water-in-oil solid cosmetic composition, based on the total weight of the composition, 1 to 40% by weight of volatile silicone oil, 1 to 20% by weight of volatile silicone oil oil-absorbent powder, 1 to 8 of acrylate / dimethicone copolymer 20 to 60 wt% of an oil phase component including 1 wt% to 8 wt% of sorbitan sulfate; 1 to 30 wt% of aqueous phase component; And 10 to 50% by weight of a pigment component. The water-in-oil solid cosmetic composition of the present invention is lightly and gently spread by the oil absorbed silicone oil when the skin is applied, and after the application, the volatile silicone oil is gradually volatilized to finish smoothly, as well as long-term stability and ease of use, and external temperature. There is no sweating due to change.

Description

Solid cosmetic composition in the form of water-in-oil emulsion

The present invention relates to a water-in-oil solid cosmetic composition.

Typically, the emulsion cosmetic composition forms are roughly divided into oil-in-water (O / W) emulsion type and water-in-oil (W / O) emulsion. Oil-in-water (O / W) emulsified type is a hydrophilic type, which is moist and soft in use, but it is inferior in cosmetic persistence and water resistance, and when the contents are exposed to air, shrinkage due to volatilization of water components causes long-term stability. There is this. In order to remedy this drawback, a water-in-oil (W / O) emulsified type has been developed. However, the water-in-oil (W / O) emulsified type has excellent cosmetic persistence and water resistance, but has a disadvantage in that it is a burden on the skin due to stickiness, oiliness, waxy feeling, and poor usability such as spreadability and spreadability.

In order to improve the usability of such water-in-oil solid cosmetics, water-in-oil solid cosmetics containing a large amount of volatile silicone oils have been developed. However, water-in-oil solid cosmetics containing volatile silicone oils, like oil-in-water solid cosmetics, when the contents are exposed to air, the contents shrink due to volatilization of the volatile silicone oil, resulting in poor long-term stability. Although it spreads lightly on the skin, the use of silicone oil makes it difficult to make the makeup even before the makeup is finished. In order to increase the long-term stability of the water-in-oil solid cosmetics containing such volatile silicone oil, Japanese Patent Laid-Open No. 2002-342 discloses a method for preventing volatilization of volatile silicone oil by developing a container having an increased sealability of the container itself. In addition, a method for suppressing volatilization of the volatile silicone oil itself contained in the solid cosmetics has been developed, but the effect is insufficient.

On the other hand, the solid cosmetics due to the change in the external temperature, the oil in the contents elutes to the surface and flows out, or the pigment is eluted with the sweating phenomenon, resulting in poor appearance and has a disadvantage in that a lot of inconvenience in use.

Accordingly, the technical problem to be solved by the present invention is to solve the above problems, lightly and gently spread by the oil absorbed silicone oil during application of the skin, and after application, the volatile silicone oil is gradually volatilized to finish smoothly, and long-term stability The present invention provides a water-in-oil and solid cosmetic composition that has a good feeling of use and does not cause sweating due to external temperature change.

In order to achieve the above object, the present invention, based on the total weight of the composition, 1 to 40% by weight of volatile silicone oil, 1 to 20% by weight of volatile silicone oil oil-absorbent powder, 1 to 8 acrylate / dimethicone copolymer 20 to 60 wt% of an oil phase component including 1 wt% to 8 wt% of sorbitan sulfate; 1 to 30 wt% of aqueous phase component; And it provides a water-in-oil solid cosmetic composition containing 10 to 50% by weight of the pigment component.

In the water-in-oil solid cosmetic composition according to the present invention, it is preferable to use vinyl dimethicone / methicone silsesquioxane crosspolymer as the volatile silicone oil oil absorbent powder.

In the water-in-oil solid cosmetic composition according to the present invention, it is preferable to use cyclomethicone as the volatile silicone oil, but it can be mixed with the nonvolatile silicone oil as necessary.

Hereinafter, the water-in-oil solid cosmetic composition of the present invention will be described in detail.

The water-in-oil solid cosmetic composition of the present invention is based on the total weight of the composition, 1 to 40% by weight of volatile silicone oil, 1 to 20% by weight of volatile silicone oil oil absorbent powder, 1 to 8% by weight of acrylate / dimethicone copolymer and 20 to 60 wt% of an oil phase component including 1 to 8 wt% of sorbitan sulfate; 1 to 30 wt% of aqueous phase component; And it provides a water-in-oil solid cosmetic composition containing 10 to 50% by weight of the pigment component.

Volatile silicone oils such as cyclomethicone contained in the water-in-oil solid cosmetic composition of the present invention are used in not only an emulsified solid cosmetic formulation but also an emulsified liquid cosmetic, which is a raw material that greatly improves the feeling of use of the cosmetic. The water-in-oil solid cosmetic composition of the present invention contains 1 to 40% by weight of a volatile silicone oil, and may be further added a nonvolatile silicone oil such as dimethicone as necessary. At this time, the total content of the volatile silicone oil and the nonvolatile silicone oil is preferably added in 10 to 50% by weight based on the total weight of the cosmetic composition.

The contents containing volatile silicone oil provide a light and soft feeling when applied, and after application, the volatile silicone oil is volatilized to provide a smooth, oily finish and a natural makeup finish. However, volatile silicone oils have the disadvantage of lowering long-term stability in water-in-oil solid cosmetics. That is, the contents containing the volatile silicone oil volatilizes the volatile silicone oil on the surface of the contents during storage or when the contents are in contact with air, so that shrinkage of the contents occurs, and the stability is broken over time.

The acrylate / dimethicone copolymer contained in the water-in-oil solid cosmetic composition of the present invention functions to suppress volatilization of the aforementioned volatile silicone oil. Since the acrylate / dimethicone copolymer forms a thin film on the surface of the cosmetic contents, it prevents volatilization of volatile silicone oil from the surface of the contents during cosmetic storage, thereby increasing the long-term stability of the water-in-oil solid cosmetics. In addition, the acrylate / dimethicone copolymer forms a thin cosmetic fixing film that does not disperse easily on sebum or sweat after the solid cosmetic is applied to the skin, thereby increasing the makeup's durability. The content of the acrylate / dimethicone copolymer contained in the water-in-oil solid cosmetic composition of the present invention is 1 to 8% by weight, preferably 2 to 6% by weight of the total weight of the cosmetic composition. If the content of the acrylate / dimethicone copolymer is less than 1% by weight may inhibit the surface volatilization, when the content of more than 8% by weight may reduce the feeling.

In addition, the water-in-oil solid cosmetic composition is spread lightly at first by the volatile silicone oil contained in the makeup, but due to the rapid volatilization of volatile silicone oil, the feeling becomes stiff before the makeup is finished, or the first applied place is a powder. It has the disadvantage that it is difficult to make the makeup evenly on the whole face. The volatile silicone oil oil absorbent powder contained in the water-in-oil solid cosmetic composition of the present invention absorbs the volatile silicone oil and slowly adjusts the volatilization rate of the silicone oil, thereby spreading lightly and uniformly without feeling stiff during makeup. Function to make it possible. After the make-up, the volatile silicone oil contained in the oil-absorbent powder is continuously volatilized and transferred to the powder to give a smooth finish. As the volatile silicone oil oil absorbent powder, silica powder, silicone resin powder, vinyl dimethicone / methicone silsesquioxane crosspolymer, or the like may be used alone or in combination thereof. In particular, the vinyl dimethicone / methicone silsesquioxane crosspolymer is very useful as a volatile silicone oil oil-absorbent powder because it has a very good oil absorption capacity for volatile silicone oil. The oil absorption capacity (g / 100g) of vinyl dimethicone / methicone silsesquioxane crosspolymer with respect to volatile silicone oil was measured, and it is shown in following Table 1 with the oil absorption ability of other powder.

The content of the volatile silicone oil oil absorbent powder contained in the water-in-oil solid cosmetic composition of the present invention is 1 to 20% by weight. If the content of the volatile silicone oil oil absorbent powder is less than 1% by weight, the oil absorption of the volatile silicone oil may be lowered. If the content is more than 20% by weight, the amount of volatile silicone oil absorbed becomes too much, and thus the speed of transferring to the powder after makeup Is too slow to cause oily rather than smooth.

Another problem with water-in-oil solid cosmetics is that when the temperature changes in the external environment, oil in the contents elutes to the surface and flows down or the pigments elute together, sweating occurs that results in poor appearance. This is due to the change in the volume expansion rate between the oil itself and the oil-wax, and the oil component in the solid composition flows out from the inside of the solid to the surface due to the volume expansion caused by the temperature rise. In order to prevent such sweating, it is preferable to use a raw material having no volume flatness between oil and wax. However, as a raw material currently used, there is a limit in reducing the difference in volume expansion between oil and wax. In order to solve the sweating, a method of increasing the content of wax or adding powder or low melting point wax having excellent oil absorption ability to the cosmetic, and increasing the hardness by increasing the content of the wax have been proposed. There are disadvantages to getting worse.

The sorbitan oleate contained in the water-in-oil solid cosmetic composition of the present invention serves to prevent sweating without substantially reducing the feeling of use of the cosmetic. This is because sorbitan sulfate, which promotes gelation of oil, effectively gels the oil phase of the emulsion type solid foundation, thereby suppressing the volumetric increase rate of the oil due to temperature change. The content of sorbitan sulfate in the water-in-oil solid cosmetic composition of the present invention is 1 to 8% by weight, preferably 2 to 6% by weight based on the total weight of the cosmetic composition. If the content of sorbitan oleate is less than 1% by weight, the antiperspirant effect is lowered, and if the content exceeds 10% by weight, there is a problem in that the feeling of use of the cosmetic becomes worse.

The aforementioned volatile silicone oil oil absorbent powders, acrylate / dimethicone copolymers, sorbitan oleate and volatile silicone oils form an oily component. In addition, oil phases such as waxes and ester oils, for example, 1 to 10% by weight More ingredients may be added. In the water-in-oil solid cosmetic composition of the present invention, the content of the preferred oil phase component is 20 to 60% by weight based on the total weight of the cosmetic composition.

The water-in-oil solid cosmetic composition of the present invention, depending on the composition of the conventional water-in-oil solid cosmetic composition, known water components such as purified water, betaine, butylene glycol, glycerin, propylene glycol, dipropylene glycol alone or these 1 It contains 1-30 weight% in mixture of 2 or more types. In addition, it contains 10 to 50% by weight of known pigment components such as titanium dioxide, talc, mica, iron oxide, etc. alone or in combination of one or more thereof.

In addition, the water-in-oil solid cosmetic composition of the present invention can be further added to the components that are conventionally added to the water-in-oil solid cosmetic composition within a range that does not impair the object of the present invention.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Examples 1 to 3 and Comparative Examples 1 to 3

To the ingredients and contents as described in Table 2 below were prepared as follows. That is, according to the composition shown in Table 2 below, the raw material of the oily component 1-11 was dissolved by heating to 80-85 ° C, and then the raw material of the pigment 15-19 was added to disperse uniformly, 12-14 and 20 raw materials were added and emulsified. After defoaming, the mixture was filled in a molder and cooled at room temperature to prepare a water-in-oil solid cosmetic.

Hereinafter, sweating phenomenon, volatilization rate, and usability of the water-in-oil solid cosmetics obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated.

<Perspiration evaluation>

In order to determine the degree of sweating of the water-in-oil solid cosmetics of Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated according to the naked eye evaluation criteria described below while increasing to the temperature conditions shown in Table 3.

(Visual evaluation criteria)

Very bad (very severe sweating): 1

Bad (severe sweating): 2

Good (fine sweating): 3

Excellent (no sweating at all): 4

Volatilization Rate Evaluation

In order to determine the degree of volatilization of the water-in-oil solid cosmetics of Examples 1 to 3 and Comparative Examples 1 to 3, each of the contents was put in a FLACONE DISH (3001), and the cover was removed and stored in a 37 degree incubation. While measuring the volatilization (%) according to the time shown in Table 4 below.

Volatilization Rate (%) = (Volatility of Contents / Initial Content Weight) ⅹ100

<Evaluation of feeling>

50 females aged 25 to 45 years were divided into four groups, and the Examples and Comparative Examples were appropriately adjusted to each group to be used on both sides of the face, and according to the following evaluation criteria, application properties, uniformity of application, makeup persistence, and fit , And the results are shown in Table 5.

<Evaluation Criteria>

Very bad: 1, Bad: 2, Fair: 3 Good: 4, Very good: 5

Referring to the above results, it can be seen that the cosmetic composition of Examples 1 to 3 containing sorbitan olivate according to the present invention is stable because the sweating phenomenon is greatly suppressed by the oily gelling effect, but sorbitan oleate is not contained. In the cosmetics of Comparative Examples 1 and 3 it can be seen that sweating occurs greatly. In addition, the cosmetics (Comparative Examples 1 and 2) containing no acrylate / dimethicone copolymer as a film forming agent exhibit high volatilization ratio, but the cosmetics of Examples 1 to 3 containing acrylate / dimethicone copolymer are It can be seen that the volatilization rate is greatly reduced. It is determined that the surface volatilization is suppressed by forming an effective film on the surface of the contents, from which the shrinkage of the contents is reduced, thereby increasing long-term stability.

On the other hand, referring to Table 5, the cosmetics of Examples 1 to 3 according to the present invention appeared to have a better feeling than Comparative Examples 1 to 3. Among the items, the applicability and coating uniformity of Examples 1 to 3 were excellent. The vinyl dimethicone / methicone silsesquioxane crosspolymer or silica powder contained a large amount of volatile silicone oil until the end of the cosmetic coating on the face. Since it does not volatilize the oil, it maintains a light and soft application and gives a uniform makeup. In addition, the cosmetics of Examples 1 to 3 were excellent not only cosmetic persistence by the film forming agent but also excellent overall feeling of use such as adhesion.

As described above, the water-in-oil solid cosmetic composition according to the present invention greatly improved the application and uniformity of makeup by controlling the volatilization rate of the silicone oil. In addition, the sweating phenomenon due to the external temperature change was almost completely improved, and the long-term stability of the contents was increased by greatly suppressing the surface volatilization of the contents, and the overall feeling of application such as application properties, coating uniformity, adhesion, and makeup persistence was also very excellent. appear.

Claims (5)

Based on the total weight of the composition, 20 to 60 oil phase components comprising 1 to 40% by weight of volatile silicone oil, 1 to 20% by weight of volatile silicone oil oil absorbent powder, 1 to 8% by weight of acrylate / dimethicone copolymer, and 1 to 8% by weight of sorbitan oleate weight%; 1 to 30 wt% of aqueous phase component; And 10 to 50% by weight of the pigment component; water-in-oil solid cosmetic composition comprising a. The water-in-oil solid cosmetic composition according to claim 1, wherein the volatile silicone oil is cyclomethicone. The water-in-oil solid cosmetic composition according to claim 1, wherein the volatile silicone oil oil absorbent powder is vinyl dimethicone / methicone silsesquioxane crosspolymer. The water-in-oil solid cosmetic composition according to claim 1, wherein the oil phase component further includes a nonvolatile silicone oil, and the total content of the volatile silicone oil and the nonvolatile silicone oil is 10 to 50 wt%. The water-in-oil solid cosmetic composition according to claim 1, wherein the oily component further comprises 1 to 10% by weight of a wax.