阅读说明：本技术 包含胆甾液晶颗粒的化妆料组合物及其制造方法 (Cosmetic composition comprising cholesteric liquid crystal particles and method for producing same ) 是由 李敎勋 金晟恩 韩钟燮 于 2017-12-06 设计创作，主要内容包括：本发明提供包含平均粒径为50μm至500μm的胆甾液晶颗粒的化妆料组合物及其制造方法。根据本发明的化妆料组合物由于包含具有受控的平均粒径和窄的粒度分布的胆甾液晶颗粒,因此提高了颜色或色调随视角而变化的视觉依赖性的表达。(The present invention provides a cosmetic composition comprising cholesteric liquid crystal particles having an average particle diameter of 50 to 500 μm and a method for producing the same. The cosmetic composition according to the present invention improves the expression of visual dependence of color or hue as a function of viewing angle due to the inclusion of cholesteric liquid crystal particles having a controlled average particle diameter and a narrow particle size distribution.)

1. A cosmetic composition comprising cholesteric liquid crystal particles having an average particle diameter of 50 to 500 μm.

2. The cosmetic composition according to claim 1, wherein the cholesteric liquid crystal particles are present in the form of a dispersed phase or a continuous phase of an oil-in-water emulsion or a water-in-oil emulsion.

3. The cosmetic composition according to claim 1, wherein the dispersion degree (α) of the cholesteric liquid crystal particles is 0.35 or less.

4. The cosmetic composition according to claim 1, wherein the cholesteric liquid crystal particles are contained in an amount of 0.1 to 10% by weight, relative to the total weight of the composition.

5. The cosmetic composition according to claim 2, wherein the emulsion is an oil-in-water emulsion, and the aqueous phase portion of the oil-in-water emulsion comprises 10 to 50% by weight of the moisturizing agent, 0.01 to 1.0% by weight of the thickening agent, and the balance purified water, relative to the total weight of the composition.

6. The cosmetic composition according to claim 5, wherein the humectant is one or more selected from the group consisting of glycerin, butylene glycol, propylene glycol, dipropylene glycol, diglycerin, pentanediol, isoprene glycol, and erythritol.

7. The cosmetic composition according to claim 5, wherein the thickener is one or more selected from the group consisting of guar gum, xanthan gum, ethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, sodium polyacrylate, glycerol polyacrylate, and hydroxypropyl cellulose.

8. A method for producing a cosmetic composition, which comprises

A step of preparing a liquid crystal portion containing cholesteric liquid crystal; and

and a step of dispersing the liquid crystal portion into a continuous phase after passing through a porous film, and converting the liquid crystal portion into a liquid crystal particle dispersed phase to obtain an emulsion containing cholesteric liquid crystal particles.

9. The method for producing a cosmetic composition according to claim 8, further comprising the step of cooling the emulsion.

10. The method for producing a cosmetic composition according to claim 8, wherein the porous film is porous alumina, porous zirconia, porous stainless steel or porous glass.

11. The method for producing a cosmetic composition according to claim 8, wherein the average diameter of the pores of the porous membrane is 0.1 μm to 2 mm.

Technical Field

The present invention relates to a cosmetic composition containing cholesteric liquid crystal particles and a method for producing the same, and more particularly, to a cosmetic composition which improves the viewing angle dependence of the unique appearance characteristics of cholesteric liquid crystal particles, i.e., the color changing with the viewing angle, by adjusting the size and particle size distribution of cholesteric liquid crystal particles, and a method for producing the same.

Background

Cholesteric liquid crystals are liquid crystals in which each layer of molecules arranged in a planar shape is spirally rotated, and are used in temperature sensors, display devices, and the like by utilizing their unique optical characteristics. Recently, a cosmetic material that utilizes visual dependency of a cholesteric liquid crystal, which is one of characteristics of the cholesteric liquid crystal, and changes in color tone depending on a viewing angle has been attracting attention.

For example, JP2015-063477a discloses an emulsified cosmetic composition containing cholesteric liquid crystal particles obtained by pulverizing a light reflecting layer formed by fixing at least one of a dextrorotatory cholesteric liquid crystal phase and a levorotatory cholesteric liquid crystal phase, and an alcohol having an alkyl group of 2 to 5 carbon atoms, and an oil agent and an emulsifier, and JP2010-90206A discloses a liquid crystal composition having a cholesteric phase at room temperature or around body temperature by using a plant material and exhibiting an aesthetic decorative effect when applied to human lips or skin, and a cosmetic composition containing the same.

However, when cholesteric liquid crystal is used in a dosage form by the conventional method disclosed in the above patent, there are problems in that it is difficult to manufacture a certain form of appearance, and aesthetic characteristics of appearance may be lost due to stability problems such as structural destruction of cholesteric liquid crystal during the manufacturing process.

Disclosure of Invention

Technical subject

Accordingly, the present inventors have made an effort to include cholesteric liquid crystals in a liquid phase formulation in a certain form, and as a result, have confirmed that when cholesteric liquid crystal particles having a uniform particle size distribution are dispersed in an aqueous phase part while adjusting the particle size by a film emulsification method to manufacture an emulsion, the stability of the particles can be secured, and in addition, the unique appearance of the cholesteric liquid crystal particles, i.e., the characteristic that the color changes depending on the viewing angle, can be improved, thereby completing the present invention.

Means for solving the problems

An object of the present invention is to provide a cosmetic composition which improves the expression of the unique appearance characteristic of cholesteric liquid crystal particles, i.e., the viewing angle dependence of color as a function of viewing angle.

Another object of the present invention is to provide a method for manufacturing a cosmetic composition comprising the above cholesteric liquid crystal particles.

Effects of the invention

According to the cosmetic composition containing cholesteric liquid crystal particles of the present invention, since cholesteric liquid crystal particles having an average particle diameter of particles adjusted to a range of 50 μm to 500 μm and having a narrow particle size distribution are contained, visual dependence of color or hue depending on viewing angle is greatly improved.

Drawings

Fig. 1 is a schematic view illustrating an apparatus to which a manufacturing method of cosmetic according to the present invention is applied.

Fig. 2 is a photograph of a cosmetic composition including cholesteric liquid crystal particles manufactured according to the manufacturing method of the present invention.

Fig. 3 is a photograph of a cosmetic composition containing cholesteric liquid crystal particles manufactured using a stirrer-type emulsification tank.

Fig. 4 is a photograph of a cosmetic composition containing cholesteric liquid crystal particles manufactured using a homomixer.

Fig. 5 is a graph comparing particle distributions of the composition manufactured according to the manufacturing method of the present invention and the composition manufactured using the stirrer type and the homomixer.

Detailed Description

The cosmetic composition of the present invention for achieving the above object comprises cholesteric liquid crystal particles having an average particle diameter of 50 to 500 μm.

The cholesteric liquid crystal particles may be present in the form of a dispersed phase of an oil-in-water emulsion or a water-in-oil emulsion.

The value of the degree of dispersion (α) of the cholesteric liquid crystal particles may be 0.35 or less.

The content of the cholesteric liquid crystal particles may be 0.1 to 10% by weight.

The emulsion is an oil-in-water type emulsion, and the water phase portion of the oil-in-water type emulsion may contain 10 to 50% by weight of a humectant, 0.01 to 1.0% by weight of a thickener, and purified water.

The method for producing the cosmetic composition according to the present invention comprises: preparing liquid crystal portions containing cholesteric liquid crystals, respectively; and a step of dispersing the liquid crystal portion into a continuous phase after passing through the porous film, and converting the liquid crystal portion into a liquid crystal particle dispersed phase to obtain an emulsion.

The above manufacturing method may further comprise the step of cooling the emulsion.

The porous film may be porous alumina, porous zirconia, porous stainless steel or porous glass.

The average diameter of the pores of the porous membrane may be 0.1 μm to 2 mm.