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Cationic polymer nanoparticles encapsulating an active ingredients, and the cosmetic composition containing the same

A cationic polymer and nanocapsule technology, applied in cosmetic preparations, nanotechnology for materials and surface science, nanotechnology, etc., can solve human safety problems, reduce the stability of oil-soluble active components, increase the oil content Problems such as the relative surface area of ​​the soluble component capsules, etc., to achieve the effect of a simple method

Active Publication Date: 2013-01-02
AMOREPACIFIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when polymer capsules with a particle size below 50 nm are applied to the skin together with cosmetics, they pose problems in terms of human safety and increase the relative surface area of ​​capsules containing oil-soluble ingredients, resulting in the stability of oil-soluble active ingredients reduce

Method used

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  • Cationic polymer nanoparticles encapsulating an active ingredients, and the cosmetic composition containing the same
  • Cationic polymer nanoparticles encapsulating an active ingredients, and the cosmetic composition containing the same
  • Cationic polymer nanoparticles encapsulating an active ingredients, and the cosmetic composition containing the same

Examples

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preparation example Construction

[0025] Hereinafter, each step of an example of the preparation method of the cationic polymer nanocapsules with surface potential of the present invention will be described in detail.

[0026] 1) The step of preparing a hydrophobic functional polymer with a cationic functional group capable of absorbing active components:

[0027] In the present invention, the preparation of the polymer having cationic functional groups is carried out using an emulsifier-free emulsion polymerization method.

[0028]In the present invention, in order to impart cationic properties to the polymer, it is preferable to use a radical polymerizable cationic monomer, or a low molecular weight polymer having a molecular weight of 400-800. Specific examples of such monomers and polymers may include 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine, acrylamide, (meth)acrylamide, vinylpyrrolidone, vinyl-N-methyl Pyridine chloride, 3-methacryloyl-2-ethyl-tetraalkylammonium chloride (3-methacryloyl-2-ethyl...

Embodiment 1

[0051] A butyl methacrylate random copolymer was prepared in the following manner. Based on the weight of the polymer, 75% by weight of butyl methacrylate was mixed with 25% by weight of (methacryloyl)ethyl diethylamine. The mixture was added to 0.5% 2,2′-azobis(2-methylpropylamidine) dihydrochloride aqueous solution, and polymerized at 70° C. under a nitrogen atmosphere for 4 hours under stirring at 250 rpm, Thus, a polymer latex was obtained. The prepared polymer was precipitated with sodium chloride to obtain a powder. The powder was recrystallized from acetone / water to remove unreacted monomer and reprecipitated with sodium chloride to give a powder. The powder was filtered and washed with water, and this filtering and washing process was repeated several times. The resulting material was dried in a vacuum oven, whereby powdered capsules were obtained.

[0052] To prepare nanocapsules encapsulating Coenzyme Q-10, 2 g of the polymer having cationic functional groups pre...

Embodiment 2

[0054] Polymers and capsules were prepared according to the method of Example 1, except that methyl methacrylate was used to prepare a random copolymer of methyl methacrylate with cationic functional groups.

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Abstract

Disclosed herein are cationic polymer nanocapsules encapsulating an oil-soluble active ingredient, and a cosmetic composition containing the same. The cationic polymer nanocapsules have a molecular weight of 5,000-100,000, a surface potential of 5-100 mV and a particle size of 50-500 nm. Also, disclosed is a cosmetic composition containing the cationic polymer nanocapsules.

Description

technical field [0001] The present invention relates to a cationic polymer nanocapsule for encapsulating an oil-soluble active component, and a cosmetic composition containing the capsule, in particular to a cationic polymer with a molecular weight of 5,000-100,000, a surface potential of 5-100mV, and a particle size of 50-500nm Nanocapsules, and a cosmetic composition containing the cationic nanocapsules. Background technique [0002] The skin is composed of three main layers: stratum corneum, epidermis and dermis. The skin is the main protective barrier of the human body. Its function is to protect various organs in the body from the influence of temperature and humidity, and from external environmental stimuli such as UV and pollutants. This protective function of the skin depends on the presence of The physical and chemical properties of the stratum corneum, the outermost layer of the skin. The stratum corneum is composed of corneocytes containing keratin as a main com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/11
CPCA61K8/11B01J13/02B01J13/14B82Y30/00
Inventor 金容震金真雄柳珠熙沈钟沅金俊吾张利燮
Owner AMOREPACIFIC CORP
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