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Cosmetic composition comprising cholesteric liquid crystal particles, and preparation method therefor

A technology of cholesteric liquid crystal and a manufacturing method, which is applied to cosmetic preparations, medical preparations containing active ingredients, cosmetics, etc., can solve the problems of loss of aesthetic features of appearance, difficulty in manufacturing appearance, destruction of cholesteric liquid crystal structure, and the like. Improve the effect of visual dependence

Active Publication Date: 2020-09-18
LG HOUSEHOLD & HEALTH CARE LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, by using cholesteric liquid crystals in dosage forms by the conventional methods disclosed in the above-mentioned patents, it is difficult to manufacture a certain form of appearance, and the aesthetics of the appearance may be lost due to stability problems such as structural damage of cholesteric liquid crystals during the manufacturing process. characteristic problem

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  • Cosmetic composition comprising cholesteric liquid crystal particles, and preparation method therefor
  • Cosmetic composition comprising cholesteric liquid crystal particles, and preparation method therefor
  • Cosmetic composition comprising cholesteric liquid crystal particles, and preparation method therefor

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specific Embodiment approach

[0026] The cosmetic composition according to the invention comprises cholesteric liquid crystal particles as the dispersed or continuous phase of an oil-in-water or water-in-oil emulsion.

[0027] In the present invention, a cholesteric liquid crystal refers to a compound whose molecular structure has a helical structure in a liquid crystal state. These are layered substances, and have a structure in which the orientation axis changes with each layer. Therefore, when light is irradiated onto the cholesteric liquid crystal, circularly polarized light in a specific wavelength region corresponding to the direction of the rotation direction of the helix of the liquid crystal molecules and the length of the pitch is reflected. For example, when visible light is irradiated, light of a specific wavelength corresponding to the length of the pitch of the liquid crystal is selectively reflected. Additionally, cholesteric liquid crystals have optical properties that, unlike pigments or ...

Embodiment 1

[0070] Example 1: Production of a cosmetic composition according to the production method of the present invention

[0071] For the compositions mentioned in Table 1 below, part of the aqueous phase was put into a tank capable of temperature regulation and stirring. figure 1 In the continuous phase tank (6), heat and dissolve at 40 to 60° C. and stir at 100 to 500 rpm. Then, the cholesteric liquid crystal substrate (UC10, LCR Hallcrest, USA) was put into the dispersed phase tank (3), and a pressure of 5 to 40 kPa was applied to perform membrane emulsification through the module (5) provided with the membrane in the water phase part , thereby dispersing the cholesteric liquid crystal particles in the aqueous phase.

[0072] After that, the composition obtained above was cooled to 30° C. to finally manufacture a cosmetic composition whose color changes with viewing angle through cholesteric liquid crystal particles.

[0073] [Table 1]

[0074]

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Abstract

The present invention provides: a cosmetic composition comprising cholesteric liquid crystal particles having an average diameter of 50-500 [mu]m; and a preparation method therefor. The cosmetic composition according to the present invention comprises cholesteric liquid crystal particles having a controlled average diameter and a narrow particle size distribution, and thus the expression of viewing angle dependence in which a color or a color tone changes according to the viewing angle is improved.

Description

technical field [0001] The present invention relates to a cosmetic composition containing cholesteric liquid crystal particles and a method for producing the same, and in more detail, to improving the unique appearance characteristic of cholesteric liquid crystal particles, that is, color change with viewing angle, by adjusting the size and particle size distribution of cholesteric liquid crystal particles Viewing angle dependent cosmetic composition and method for its manufacture. Background technique [0002] Cholesteric liquid crystals are liquid crystals in which molecules are arranged in a planar arrangement and each layer of molecules rotates helically, and are used in temperature sensors, display devices, and the like by utilizing their unique optical properties. Recently, attention has been drawn to cosmetics that utilize the visual dependence of color tone changes depending on the viewing angle, which is one of the characteristics of cholesteric liquid crystals. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/02A61K8/06A61K8/34A61K8/73A61K8/19A61Q19/00
CPCA61Q19/00A61K8/63A61K2800/412A61K8/0295A61K8/062A61K8/064A61K8/345A61K8/731A61K8/737A61K2800/10A61K2800/48A61K2800/805
Inventor 李敎勋金晟恩韩钟燮
Owner LG HOUSEHOLD & HEALTH CARE LTD
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