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Flavonoid-deposited polymer composite particles and a process for preparation of the same, and cosmetic compositions containing the same

A technology of cosmetic composition and composite particles, which is applied in the direction of medical preparations, cosmetics, and cosmetics containing active ingredients. It can solve the problems of difficult preparation activity value, poor solubility, application restrictions, etc., and achieve excellent cosmetic feeling and improve feeling , improve the effect of coverage

Inactive Publication Date: 2006-12-20
AMOREPACIFIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, EGCg has poor solubility in water or oil used as a cosmetic base, so it is dispersed in its own needle-like crystals, causing a rough feeling
For this reason, the application of EGCg in cosmetic formulations is still limited despite its excellent biological activity.
In addition, EGCg is very unstable to external stimuli such as moisture, oxygen, and light, so EGCg molecules will denature rapidly, and it is difficult to maintain its activity value in formulations

Method used

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  • Flavonoid-deposited polymer composite particles and a process for preparation of the same, and cosmetic compositions containing the same
  • Flavonoid-deposited polymer composite particles and a process for preparation of the same, and cosmetic compositions containing the same
  • Flavonoid-deposited polymer composite particles and a process for preparation of the same, and cosmetic compositions containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Example 1 Porous Polymer Particles and Deposition of EGGg

[0040] Porous polymer particles were prepared as follows.

[0041] Methyl methacrylate / ethylene glycol dimethacrylate (as crosslinker) / toluene were mixed in the reactor in a weight ratio of 18 / 42 / 40 to obtain 100 grams of solution. Add 2,2-azobis(2,4-dimethylvaleronitrile) as an initiator to the solution in an amount of 1% by weight relative to the monomer weight, and stir at room temperature until completely dissolved . The resulting solution was then added to a 1% aqueous solution of polyvinyl alcohol having an average saponification value of 89%, and emulsified with a homogenizer at 6000 rpm for 5 minutes. At this time, the concentration of the methyl methacrylate / crosslinking agent / toluene solution in the aqueous phase was 15% by weight.

[0042] Next, the reactor was heated to 70° C. and polymerized for 10 hours. The porous polymer particles are then collected by filtration. The collect...

Embodiment 2

[0044] Embodiment 2 has the preparation of the porous polymer particle of nitrile group and the deposition of EGCg

[0045] According to the steps described in Example 1, the porous polymer particles with nitrile groups were prepared, except that the weight ratio of methyl methacrylate / acetonitrile / ethylene glycol dimethacrylate / toluene. EGCg deposition was performed following the same procedure as described in Example 1.

Embodiment 3

[0046] Example 3 Porous polymer particles with hydroxyl groups and their EGCg deposition

[0047] Polymerization was carried out following the same procedure as described in Example 1 using methyl methacrylate / vinyl acetate / ethylene glycol dimethacrylate / toluene in a weight ratio of 12 / 6 / 42 / 40. After termination, 0.8% by weight of sodium hydroxide was added to the reactants, and then the acetate was saponified at room temperature for 10 hours to obtain porous polymer particles having hydroxyl groups. EGCg deposition was performed following the same procedure as described in Example 1.

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Abstract

The present invention relates to flavonoid-deposited polymer composite particles and a process for preparation of the same, and to cosmetic compositions containing the same. The present invention, by depositing and fixing flavonoids such as epigallocatechin gallate (EGCg) on the large surface of porous polymer particles, can minimize flavonoid molecular denaturation from external irritants such as oxygen and light and be applied to various cosmetic formulations.

Description

technical field [0001] The invention relates to flavonoid-depositing polymer composite particles, a preparation method thereof, and a cosmetic composition containing the composite particles. The flavonoid-deposited polymer composite particles of the present invention obtained by depositing flavonoids such as epigallocatechin gallate (EGCg) onto the large surface of porous polymer particles are protected from external stimuli such as oxygen and light to Minimizes the denaturation of flavonoid molecules, which can be used in various cosmetic preparations. Background technique [0002] The excellent medicinal effects of green tea come from the flavonoids, especially catechins, which are rich in it. Among these flavonoids, epicatechin [(-)EC], epigallocatechin [(-)EGC], epicatechin gallate [(-)ECg] and epigallocatechin gallate The ester [(-)EGCg] is called "tea catechin". In particular, epigallocatechin gallate (hereinafter referred to as "EGCg") represented by the following ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04A61K8/81A61Q1/00A61K8/04A61K8/49A61Q19/00C08J9/224
CPCA61Q19/00A61K8/8152C08J9/224A61K2800/612A61K8/0279A61K8/498A61K2800/52A61Q1/02
Inventor 李钟硕金真雄金俊吾韩相勋张利燮
Owner AMOREPACIFIC CORP