KR20130060663A - Double layer cosmetic composition having instant color shift by physical mixing - Google Patents

Abstract

The present invention relates to a cosmetic composition that changes color instantaneously through physical mixing, and more particularly, a layer-separable cosmetic composition consisting of a lower water phase portion and an upper oil phase portion, the water-soluble active material core in the water phase portion; And a capsule comprising a shell surrounding the core and comprising a shell containing an oxygen sensitive indicator and a coating material.
The cosmetic composition effectively stabilizes the active ingredient and at the same time gives sensory differentiation through reversible color change and visually shows the shelf life of the cosmetics, allowing consumers to increase the reliability and preference for cosmetics. have.

Description

Double layer cosmetic composition having instant color shift by physical mixing}

The present invention relates to a cosmetic composition that effectively stabilizes the active ingredient and at the same time gives sensory differentiation through reversible color change and visually shows the shelf life of cosmetics.

In the cosmetics industry, users are encouraged to buy by using natural ingredients and natural ingredients. In the case of cosmetic ingredients, water-soluble ingredients, oil-soluble ingredients, powders and active ingredients are mixed in order to moisturize and protect skin and maintain skin health, and about 10 to 50 kinds of raw materials are used to manufacture a single product.

In particular, the cosmetics industry is a highly competitive industry and is growing fast as there are many competitors. With this growth, suppliers or manufacturers need to express the characteristics of the products clearly.

Recently, the development of cosmetics is a trend that gives a unique appearance or differentiated feeling different from the existing ones, and develops and introduces ingredients that can be immediately felt as soon as applied to the skin. In addition, the sense of fun as well as the look and feel of the product play a decisive role when the consumer selects the product to purchase.

As an example, Korean Patent Publication No. 2006-0113050 proposes a cosmetic composition of a formulation similar to fresh cream, and mentions that such a composition can provide a new and enjoyable consumption experience to consumers.

In addition, the Republic of Korea Patent Publication No. 2007-0106115 proposes a washable cleansing cosmetic composition having elasticity, the composition can be easily washed off with water after use without irritation to the skin and has elasticity to give a sense of fun in appearance It is starting.

In addition, Korean Patent No. 10-0869155 discloses an emulsion type cleanser that combines the advantages of cleansing oil and cleansing water as a distinctive and distinctive formulation and visually has a two-layer structure.

On the other hand, active ingredients such as vitamins have various effects such as skin whitening, collagen synthesis, removal of harmful oxygen has attracted attention in the field of medicine, pharmacy, and cosmetics. However, vitamins are easily oxidized by moisture, oxygen, or light in the air, and thus, such activities are rapidly lowered and deteriorated. Therefore, there have been many attempts in the field of cosmetic formulation to stabilize the active ingredient including vitamins.

Korean Patent No. 10-0417874 discloses a stable non-aqueous oil-in-water polyhydric alcohol emulsion cosmetic containing no water containing L-ascorbic acid at a high concentration of 1 to 8% by weight.

In addition, Korean Patent No. 10-0502646 discloses a high functional powder-like cosmetic composition stabilized by liposome stabilization of functional components and stabilized again in a porous powder.

As can be seen from these examples, skin care cosmetics are currently being studied in the direction of visually differentiating as much as the importance of efficacy and effect. However, there are many difficulties in stabilizing the active ingredient exhibiting efficacy and effect and at the same time implementing visual differentiation.

Republic of Korea Patent Publication No. 2006-0113050 Republic of Korea Patent Publication No. 2007-0106115 Republic of Korea Patent No. 10-0869155 Republic of Korea Patent No. 10-0417874 Republic of Korea Patent No. 10-0502646

Therefore, in the present invention, various studies have been conducted to effectively stabilize the active ingredient and give visual differentiation. As a result, the active ingredient is encapsulated and stabilized. A cosmetic composition was prepared which caused a reversible color change by mixing.

Accordingly, an object of the present invention is to provide a cosmetic composition that can effectively stabilize an active ingredient and impart visual differentiation.

In order to achieve the above object, the present invention is a layer-separated cosmetic composition consisting of a lower water phase and an oil phase of the upper layer,

Water soluble active material core; And a capsule surrounding the core and comprising a shell including an oxygen sensitive indicator and a coating material.

Physical mixing provides a layered cosmetic composition that changes color instantaneously.

The cosmetic composition according to the present invention can effectively visualize differentiation while simultaneously stabilizing the active ingredient, and can be applied to various cosmetic products to induce consumer interest.

In particular, it is possible to know the reversible color change through the oxygen sensitivity indicator to give a sense of fun, and can predict the shelf life of the active ingredient of the cosmetic according to the degree of the color change can increase the reliability and preference for cosmetics.

1 is a schematic diagram showing a cosmetic composition according to the present invention, (a) shows before mixing, (b) shows after mixing.

Hereinafter, the present invention will be described in more detail.

The present invention proposes a cosmetic composition that can change the color of two phase-separated formulations instantaneously according to physical mixing, and can be reversibly returned through phase separation.

Specifically, the cosmetic composition is a layer-separated composition consisting of a lower water phase part and an oil phase part of an upper layer, and includes a capsule having a core-shell structure in the water phase part. At this time, the capsule is a water-soluble active material core; And a shell surrounding the core and including an oxygen sensitive indicator and a coating material.

Oxygen-sensitive indicator is a substance that causes color change through contact with oxygen.It is present in the water phase and normally mixed with external air through the oil phase and mixed by shaking the cosmetic composition for use. To change color.

1 is a schematic diagram showing a cosmetic composition according to the present invention, (a) shows before mixing, (b) shows after mixing.

Referring to Figure 1, the cosmetic composition blocks the contact between the outside air and the water phase by the oil phase, the water phase has a capsule containing a water-soluble active substance in the inner core. The capsule includes an oxygen sensitive indicator as a coating material surrounding the water-soluble active material. At this time, as shown in (b) of FIG. 1, the oil film of the oil phase part is broken down by physical mixing to be finely granulated and converted into a single phase (emulsion) and externally. As oxygen in the air dissolves in the aqueous phase, the oxygen and the oxygen sensitive indicator come into contact with each other to cause a color change of the composition.

The color change is reversible, and when there is no external stimulus, the oil film of the oil phase part is formed on the upper part of the water phase part to block the contact between the outside air and the capsule, and the oxygen sensitivity indicator by the oxidation reaction of the sugar contained in the water phase part. Reduction occurs, returning to the original color.

In summary, the cosmetic composition presented in the present invention is composed of an aqueous phase and an oil phase, so as to at least satisfy the total 100% by weight,

(a) 1.0 to 20.0% by weight of the capsule,

    (Ii) 1.0-10.0 weight percent of reducing sugar, and

    (Iii) an aqueous phase containing water as the remainder, and

(b) It consists of an oil phase part containing 1.0-30.0 weight% of oil.

In particular, the capsule composition (i) consists of a shell composed of a water-soluble active substance as a core, an oxygen sensitive indicator and a coating material surrounding the core.

 The water-soluble active substance can be any substance known to have a functional effect of antioxidant, skin whitening and wrinkle improvement, and is typically selected from the group consisting of vitamin A, vitamin C, vitamin E, kojic acid and combinations thereof. It includes, in the embodiment of the present invention was used ascorbic acid vitamin C.

Ascorbic acid is one of the essential components of the human body. As a strong reducing agent, collagen is known to be involved in the production of collagen in the skin by activating collagen synthase. As already mentioned, the cosmetic composition according to the present invention causes a reversible color change, which retards or no longer occurs in the presence of oxygen in the composition. In other words, the 'oxygen present' refers to a state in which the oxygen in the composition is saturated, and the oxygen saturation indirectly suggests that yellowing occurs in the case of the active substance, especially ascorbic acid, and thus a cosmetic composition containing ascorbic acid In the case of the expiration date can be seen through the color change.

The content of the water-soluble active substance is to be very sensitive to air, moisture, heat, etc., because it shows a very unstable property in the water phase in the formulation should have an optimal range to stabilize. Preferably it comprises 0.1 to 10.0% by weight in the total cosmetic composition, if less than the above range can not expect the effect that can be obtained by them, on the contrary, if the above range exceeds the problem of stabilization of the composition occurs Therefore, it uses suitably within the said range.

The shell encapsulating the water-soluble active substance includes a coating material for enveloping the water-soluble active substance and an oxygen sensitive indicator for color change.

First, the oxygen sensitivity indicator includes one selected from the group consisting of methylene blue, indigo carmine, and combinations thereof, and these indicators include reducing sugars and oxygen affinity such as glucose in the water phase. Can cause reversible color change. In other words, in a stationary state, glucose absorbs all of the dissolved oxygen in the container and the oxygen-sensitive indicator blocks the binding to oxygen. When shaking by physical shock, the oxygen-sensitive indicator binds to oxygen and changes its color depending on the oxygen concentration. do. At this time, the amount of oxygen absorbed by the reducing sugar is inversely proportional to the amount of oxygen absorbed by the oxygen sensitive indicator.

The content of the oxygen sensitivity indicator is to take into account the degree of color change so that it can be sufficiently visually distinguished by physical mixing, it is used in 0.1 to 1.0% by weight in the total composition. If the content is less than the above range, the color change is insignificant despite sufficient mixing. On the contrary, if the content exceeds the above range, excessive color change may lead to consumer's antagonism and return to the original color (colorless) after the color change. Since it takes a long time to come, it is suitably used within the above range.

The coating material includes one selected from the group consisting of calcium alginate, sodium carboxymethyl cellulose, agar, chitosan, type A gelatin, type B gelatin, polyphosphate, gum arabic, carrageenan, pectin, and combinations thereof. In particular, alginic acid of calcium alginate is contained in brown algae such as seaweed, kelp, and shellfish and is known to be harmless to human body. It is known to exhibit various skin physiological effects such as effects, and in the embodiment of the present invention, calcium alginate was used to secure not only a function as a capsule but also a skin physiological effect.

Such a coating material contains 0.5 to 15.0% by weight of the content in the total composition so that the oxygen sensitive indicator is sufficiently encapsulated. If the content of the coating material is less than the above range, the color of the oxygen sensitive indicator may be easily changed due to the low or insufficient encapsulation rate of the oxygen sensitive indicator. It is not easy to contact and it is not possible to achieve the desired level of color change.

At this time, the form of the capsule is not limited in the present invention, a variety of forms, such as ordinary spherical, oval, square, etc. are possible, and preferably used to prepare a sphere having a diameter of 1 ~ 2000 ㎛.

In addition, the reducing sugar contained in the water phase part is used for the reaction with the oxygen sensitive indicator, and includes one species consisting of glucose, fructose, maltose and combinations thereof. The content of such reducing sugars is related to the content of the oxygen sensitive indicator, and if the content is less than the above range, it takes a long time for the cosmetic composition turned blue by the oxygen sensitive indicator to return to its original color (for example, colorless), On the contrary, if the range is exceeded, a problem that the color conversion speed is too fast occurs, so it is suitably used within the range.

Water is used as the remainder to satisfy 100% by weight of total weight as distilled water.

On the other hand, the oil phase comprises an oil, wherein the oil is not particularly limited in the present invention, any one that is commonly used in this field. Typically, the oil may be an oil commonly used in the art so as to dissolve the wax sufficiently. Typically, hydrocarbon-based oils including polydecene and paraffin oil; Ester synthetic oils including cetylethylhexanoate, glyceryl trioctanoate, octyldodecyl myristate, isopropyl palmitate, isopropyl myristate and octyl palmitate; Silicone oils including cyclomethicone and dimethicone; Animal oil; Vegetable oils including mango butter, shea butter, copoa seed seed butter, macadamia seed oil; Ethoxylated alkyl ester oils; cholesterol; Cholesteryl sulfate; Phytosphingosine; Sphingoidoid lipids; One selected from the group consisting of C10 to C40 fatty alcohols such as batyl alcohol, behenyl alcohol, cetostearyl alcohol, cetyl alcohol, stearyl alcohol, caprylic / capric triglyceride, ceramide and mixtures thereof can be used. .

The content of the oil phase has a range as described above, and if the content is less than the above range, it is difficult to form a sufficient oil film on the water phase. On the contrary, if the content exceeds the range, the oil phase and the single phase are formed by miniaturization during physical mixing. This difficult problem arises.

The oil phase part is present in the upper layer to form an oil film for preventing contact between the outside air and the water phase part, and the oil film varies depending on the content of the oil phase, but has a thickness of at least 0.1 μm to 5.0 mm.

In addition, additives such as water-soluble / usable physiologically active ingredients, moisturizing agents, preservatives, pH adjusting agents, fatty acids, emulsifiers, surfactants, antioxidants, ultraviolet screening agents, pigments, dyes, fragrances and stabilizers May be further added, and the kind and content thereof may be appropriately selected by those skilled in the art.

The oil-soluble physiologically active ingredient is not particularly limited in the present invention, and all active ingredients as known may be used. In one example, as the physiologically active component having a whitening effect, oil soluble components including oil soluble licorice, ethyl ascorbyl ether, α-bisabolol, and the like are possible. In addition, active ingredients having an anti-wrinkle effect may be useful active ingredients such as retinol and derivatives thereof (eg, retinyl palmitate), adenosine and the like. These oil-soluble active ingredients are used in the range of 0 to 10.0% by weight, preferably 0.001 to 10.0% by weight in the total composition.

The manufacturing method of the cosmetic composition according to the present invention is not particularly limited, but preferably

S1) providing a core-shell capsule surrounding the water-soluble active ingredient with an oxygen sensitive indicator and a coating material;

S2) preparing an aqueous phase by mixing the capsule of S1), a water-soluble active substance, and a reducing sugar with water; And

S3) is prepared through the step of adding an oil phase to the water phase.

The capsule of S1) is manufactured according to a conventional capsule manufacturing process. In one example, an oxygen sensitive indicator is added to the aqueous calcium chloride solution, mixed uniformly, and the reaction is carried out by addition of alginic acid, followed by drying the obtained material. This mixing / reaction may be made by various known methods such as bulk process, spraying process.

In addition, the mixing step of S2) is carried out in a mixer capable of temperature control and stirring by a conventional method, and the method of stirring and heating is performed as necessary.

For example, the water phase is carried out by heating to 50 to 80 DEG C, preferably 65 to 75 DEG C, and if necessary, stirring is carried out using a homomixer at a speed of 2000 to 4000 rpm, preferably 3000 rpm for 3 to 10 minutes .

The cosmetic composition prepared through these steps can be used as a cosmetic product having various formulations. Preferably it may be a formulation such as serum, essence, skin, more preferably used as an essence formulation. Massage cosmetic compositions of such formulations can be used in applications such as body skin care, facial skin care, baby care, after-sales care, whitening care, anticellulite care, cleansing and the like.

In addition, the compositions of each formulation may contain various bases and additives necessary and appropriate for the formulation of the formulation, and nonionic surfactants, silicone polymers, extender pigments, fragrances, preservatives, Fungicides, oxidation stabilizers, organic solvents, ionic or nonionic thickeners, softeners, antioxidants, free radical destroyers, opacifiers, stabilizers, emollients, silicones, α-hydroxy acids, antifoams, humectants, And known compounds such as vitamins, insect repellents, fragrances, preservatives, surfactants, anti-inflammatory agents, substance P antagonists, fillers, polymers, propellants, basicizing or acidifying agents, or coloring agents.

[Example]

Hereinafter, the present invention will be described in detail through examples. The examples are intended to illustrate the invention in more detail and the scope of the invention is not limited to these examples.

(1) capsule manufacturing

Methylene blue (0.2 g) was added to an aqueous solution of calcium chloride (0.2 g), and then dissolved in water at a predetermined concentration. Separately, alginic acid (3 g) was dispersed in water, dissolved in water, cooled to 10 to 40 ° C, and cooled to low temperature alginate gel. Prepare a solution, to which ascorbic acid (0.5 g) is added and mixed uniformly.

Capsules were prepared by dropping an ascorbic acid-added alginic acid gel solution into a calcium chloride solution in a drop form. At this time, the smaller the molecular weight of alginic acid, the weaker the strength of the jelly.

(2) Cosmetic Composition Preparation

First, purified water was added to a mixer and warmed to 70 ° C., and the remaining aqueous phase composition was added thereto, followed by stirring at 70 ° C. to completely dissolve the aqueous phase. Subsequently, the oil phase part was put in the prepared water phase part to prepare a cosmetic composition having a two-layer structure.

(3) Confirmation of appearance and color change

After confirming the appearance and the color change of the cosmetic compositions of the prepared examples and comparative examples visually, the results obtained are shown in Table 1 below.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Water top
capsule 1.0 1.0 0.5 1.0 1.0 Methylene blue - 0.1 - - - glucose 1.0 1.0 1.0 - 1.0 glycerin 3.0 3.0 3.0 3.0 3.0 water To 100 To 100 To 100 To 100 To 100 Floating Silicone oil 5.0 5.0 5.0 5.0 0.05 Appearance Water layer and oil film containing blue capsule Blue and water layer and oil layer Water and oil layers with poor appearance (lack of capsule) Water layer and oil layer containing blue capsules Water layer and thin oil film containing blue capsule Color change Reversible reaction over a week Very fast recovery, but short duration Reversible reaction over a week No reversible reaction Recovery is very fast

Cosmetic compositions according to the invention can be prepared in various formulations and marketed as a cosmetic.

Claims (18)

A layer-separable cosmetic composition comprising a lower water phase part and an upper oil phase part, wherein
Water soluble active material core; And a capsule surrounding the core and comprising a shell including an oxygen sensitive indicator and a coating material.
A layered cosmetic composition that changes color instantaneously through physical mixing. The method of claim 1, wherein the water-soluble active substance is a layer separated cosmetic composition comprising one selected from the group consisting of vitamin A, vitamin C, vitamin E, koji acid, and combinations thereof. The composition of claim 1, wherein the water-soluble active substance is contained in an amount of 0.01 to 10.0 wt% in the total composition. The composition of claim 1, wherein the oxygen sensitive indicator comprises one selected from the group consisting of methylene blue, indigo carmine, and combinations thereof. The layered cosmetic composition of claim 1, wherein the oxygen sensitive indicator is contained in an amount of 0.1 to 1.0% by weight in the total composition. The method of claim 1, wherein the coating material is selected from the group consisting of calcium alginate, sodium carboxymethyl cellulose, agar, chitosan, type A gelatin, type B gelatin, polyphosphate, gum arabic, carrageenan, pectin, and combinations thereof. Layered cosmetic composition comprising the material of the species. The layered cosmetic composition according to claim 1, wherein the coating material is contained in an amount of 0.5 to 15.0 wt% in the total composition. The composition of claim 1, wherein the capsule is contained in an amount of 1.0 to 20.0% by weight in the total composition. The layered cosmetic composition of claim 1, wherein the capsule has a spherical, oval, or square shape. The cosmetic composition according to claim 1, wherein the capsule has a spherical diameter of 1 to 2000 µm. The cosmetic composition according to claim 1, wherein the water phase part comprises one reducing sugar consisting of glucose, fructose, maltose and a combination thereof. 12. The layered cosmetic composition according to claim 11, wherein the reducing sugar is contained in an amount of 1.0 to 10.0 wt% in the total composition. The layered cosmetic composition of claim 1, wherein the oil phase portion comprises an oil. The layered cosmetic composition of claim 1, wherein the oil phase part is contained in an amount of 1.0 to 30.0% by weight in the total composition. The cosmetic composition of claim 1, wherein the oil phase part forms an oil film having a thickness of 0.1 µm to 5.0 mm. The layered cosmetic composition of claim 1, wherein the cosmetic composition is formulated in a serum, essence, or skin formulation. The layered cosmetic composition of claim 1, wherein the cosmetic composition has a reversible original color through separation of the aqueous phase and the oil phase over time after the color is changed through physical mixing. S1) providing a core-shell capsule surrounding the water-soluble active ingredient with an oxygen sensitive indicator and a coating material;
S2) preparing an aqueous phase by mixing the capsule of S1), a water-soluble active substance, and a reducing sugar with water; And
S3) The method of preparing a layered cosmetic composition of claim 1, which is prepared by adding an oil phase portion to the water phase portion.

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