Spherical zinc oxide powder coated with natural substance, method for producing same, and cosmetic composition containing same

A technology of cosmetic composition and zinc oxide powder, which is applied in the field of zinc oxide powder, can solve the problems of reduced sense of use, uneven particle shape, poor sphericity, etc., to improve safety, Improved cost competitiveness and excellent particle dispersibility

Active Publication Date: 2020-05-26
LS KOREA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Wherein, Zinc Oxide uses potato-shaped or rod-shaped particles with a particle size below 100nm, and the above-mentioned potato-shaped or rod-shaped particles have the following disadvantages: during use, the contact surfaces between particles will agglomerate together in the form of faces or lines ( Aggregation) causes a decrease in usability, and in order to obtain the ultraviolet shielding effect through the potato-shaped or rod-shaped particles that have the above-mentioned aggregation phenomenon, a strong dispersion device and a long dispersion time are required.
However, the procedure disclosed in the above-mentioned patent has the following disadvantages: it is not only too complicated and not cost-competitive, but also has poor sphericity and large particle size deviation in terms of the size and particle morphology of the finally produced powder
However, the process disclosed in the above-mentioned patent has the disadvantages of poor safety and non-uniform shape of particles due to the use of hydrochloric acid or sulfuric acid.

Method used

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  • Spherical zinc oxide powder coated with natural substance, method for producing same, and cosmetic composition containing same
  • Spherical zinc oxide powder coated with natural substance, method for producing same, and cosmetic composition containing same
  • Spherical zinc oxide powder coated with natural substance, method for producing same, and cosmetic composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] In a reactor, 1000 g of water, 200 g of amorphous zinc oxide, and 400 g of citric acid were mixed and stirred for dissolution. Into the above reactor such as figure 2 In this way, 350 g of NaOH (700 g of NaOH diluted to 50% by weight) was injected into the reactor along the wall surface of the reactor. When the above-mentioned input of NaOH, the stirring speed of the reactor was slowly accelerated from 100rpm to 400rpm in 10 minutes, and the input speed of sodium hydroxide was slowly reduced from 10ml / s to 5ml / s according to the mode of 0.05ml per second. And, it was further stirred for 10 minutes at 400 rpm as the final stirring speed, so that the total stirring time was 20 minutes. At this time, the stirring temperature was 60°C.

[0072] Next, after decelerating the stirring speed of the reactor to 150 rpm, dehydration reaction was performed at 95 degreeC for 24 hours.

[0073] Next, 40 g of TEOS and 40 g of ethanol were mixed and charged into the reactor, and re...

Embodiment 2

[0076] In said Example 1, except having used cocoa butter instead of lauroyl lysine, the spherical zinc oxide powder coated with cocoa butter was produced by the method similar to said Example 1.

Embodiment 3

[0078] In said Example 1, except having used lecithin instead of lauroyl lysine, the spherical zinc oxide powder coated with lecithin was produced by the method similar to said Example 1.

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PUM

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Abstract

The present invention relates to spherical zinc oxide, a manufacturing method thereof and a cosmetic composition comprising the same. More specifically, the present invention relates to a spherical zinc oxide powder coated with natural materials, comprising a spherical zinc oxide powder having an aspect ratio of 1 to 1.5; a tetraethyl orthosilicate (TEOS) coating layer coated with TEOS on the surface of the spherical zinc oxide powder; and a natural material coating layer coated on the surface of the TEOS coating layer, wherein the TEOS coating layer is a uniform single layer, and the naturalsubstance coating layer is a coating layer formed by coating one or more substances selected from a group consisting of lauroyl lysine, cocoa butter, lecithin and stearic acid. According to the present invention, it is possible to provide the spherical zinc oxide powder coated with natural materials having excellent UV blocking effect as well as excellent usability, dispersibility, stability and safety for the human body; a manufacturing method thereof; and a cosmetic composition comprising the same.

Description

technical field [0001] The present invention relates to a spherical zinc oxide powder coated with a natural substance, a method for producing the zinc oxide powder, and a cosmetic composition containing the zinc oxide powder. Spherical zinc oxide powder coated with a natural substance, a method for producing the zinc oxide powder, and a cosmetic composition containing the zinc oxide powder are provided which are also excellent in feel, dispersibility, stability, and safety to the human body. Background technique [0002] The content described below merely provides background information related to the present invention and does not constitute prior art. [0003] In recent years, with the progress of global industrialization and urbanization, environmental pollution such as increased emission of carbon dioxide gas is rapidly destroying the ozone layer. Due to the rapid destruction of the ozone layer, ultraviolet radiation from the sun to the earth cannot be normally blocked....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/58A61K8/55A61K8/44A61K8/27A61K8/02A61Q17/04
CPCA61K8/022A61K8/27A61K8/44A61K8/553A61K8/585A61K2800/56A61Q17/04A61K8/025A61K2800/413A61K2800/622A61K2800/623A61K2800/63
Inventor 崔美英金德镇金惠兰徐河麟
Owner LS KOREA
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