Ultraviolet light shielding agent composition comprising cerium oxide particles having surface modified with polyhydroxystearic acidand method for preparation of same

A technology of polyhydroxystearic acid and surface modification, which is applied in the field of preparation of ultraviolet shielding agent compositions, can solve the problems of heavy powder texture, unsmooth smearing, stiff use feeling, etc., and achieves low optical refractive index and shielding effect. Outstanding, excellent spreadability

Pending Publication Date: 2021-07-23
SOULBRAIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, titanium dioxide and zinc oxide have a strong photocatalytic ability to decompose or denature organic matter, especially pigments, under light energy, so they may induce component denaturation and pigmentation of dosage forms
However, when the surface is coated with alumina and silica, the powder has a thick texture, which makes it difficult to apply smoothly and has the disadvantage of being stiff in use

Method used

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  • Ultraviolet light shielding agent composition comprising cerium oxide particles having surface modified with polyhydroxystearic acidand method for preparation of same
  • Ultraviolet light shielding agent composition comprising cerium oxide particles having surface modified with polyhydroxystearic acidand method for preparation of same
  • Ultraviolet light shielding agent composition comprising cerium oxide particles having surface modified with polyhydroxystearic acidand method for preparation of same

Examples

Experimental program
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preparation example Construction

[0077] The second aspect of the present application provides a method for preparing cerium oxide particles surface-modified by polyhydroxystearic acid, which includes the following steps: mixing polyhydroxystearic acid with a solvent to prepare a mixed solution; The cerium oxide particles are mixed in the mixed solution and milled to prepare cerium oxide particles surface-modified with polyhydroxystearic acid.

[0078] The detailed description of the part that overlaps with the first aspect of the present application is omitted, but even if the description is omitted, the description of the first aspect of the present application can also be applied to the second aspect.

[0079] Below, refer to figure 1 The preparation method of the cerium oxide particles surface-modified with polyhydroxystearic acid in the second aspect of the present application will be described in detail.

[0080] First, in an implementation example of the present application, the preparation method of t...

preparation example

[0096] Preparation Example: Preparation of Cerium Oxide Particles

[0097] To prepare the ultraviolet screener composition of the present invention, cerium oxide particles are prepared.

[0098] After mixing and blending cerium hydroxide, cerium carbonate, cerium nitrate, cerium chloride, and cerium ammonium nitrate, cerium oxide particles are obtained by heat treatment at 400 to 1200°C.

Embodiment

[0099] Example: Preparation of UV Screening Composition Comprising Cerium Oxide Particles Surface-Modified with Polyhydroxystearic Acid

[0100] Step 1: Preparation of cerium oxide particles surface-modified with polyhydroxystearic acid

[0101] After adding 50 g of polyhydroxystearic acid (polyhydroxystearic acid) to 2,500 g of alkyl benzoate, it stirred. After adding 2,500 g of cerium oxide particles to the solution prepared above, it was milled in a bead mill, followed by dilution to obtain a polyhydroxystearic acid surface-modified cerium oxide dispersion.

[0102] Step 2: Prepare UV Screener Composition

[0103] 200 g of the surface-modified cerium oxide dispersion obtained in the above-mentioned step 1 was dispersed in 800 g of 20% by weight of dibasic alcohol, behenyl alcohol, ethanol and purified water in a ratio of 1:1:2:8 The ratio of the composition of the mixed alcohol solvent to prepare the cerium oxide solution. After that, the above prepared solution (5...

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Abstract

Disclosed are an ultraviolet light shielding agent composition comprising cerium oxide (CeO2) particles having surfaces modified with polyhydroxystearic acid and a method for preparation of the ultraviolet light shielding agent composition. The ultraviolet light shielding agent composition comprising cerium oxide particles having surfaces modified with polyhydroxystearic acid can exhibit excellent dispersion stability even after the lapse of a long period of time.

Description

technical field [0001] The present invention relates to a kind of cerium oxide (CeO 2 ) particle ultraviolet shielding agent composition and the preparation method of said ultraviolet shielding agent composition. Background technique [0002] Since 1928, when cosmetics containing UV-shielding agents were first developed in the United States, the demand for UV-shielding agents has shown a steady growth trend. Ultraviolet shielding agents are used to prevent skin cancer, sunburn, photoaging, etc. caused by ultraviolet rays. Recently, for cosmetic purposes, attention is being paid to preventing photoaging by shielding ultraviolet rays corresponding to UVA1 and UVA2 wavelengths. In addition to sunscreen, most dosage forms such as BB cream, CC cream, air cushion, sunscreen spray, and sunscreen stick are also being endowed with UV shielding function. [0003] The ultraviolet shielding agent added for shielding ultraviolet rays can be classified into organic ultraviolet shielding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/19A61K8/29A61K8/27A61Q17/04
CPCA61K8/19A61Q17/04A61K8/0275A61K8/85A61K2800/614A61K2800/412A61K8/29A61K8/27A61K2800/413A61K8/365
Inventor 李正浩金锡主
Owner SOULBRAIN CO LTD
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