Compositions comprising dye-loaded particles

A technology for cosmetic compositions and dyes, applied in medical preparations containing active ingredients, skin care preparations, pharmaceutical formulations, etc.

Inactive Publication Date: 2010-08-04
NOXELL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, particles known in the art generally show that dyes can leak out of the particles into which they are incorporated, which is clearly undesirable, resulting in the same safety and skin concerns as is the case with unencapsulated organic dyes. staining problem

Method used

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  • Compositions comprising dye-loaded particles
  • Compositions comprising dye-loaded particles
  • Compositions comprising dye-loaded particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] Embodiment 1: preparation absorbs the silica of tartrazine (FD&C Huang No. 5)

[0116] In the first step of the synthesis of sodium tartrate-containing silica, the dye ( Ion exchange was performed commercially available from Sigma under the trade designation T0388-100G (CAS No. 1934-21-0). This was necessary because the use of commercial tartrazine caused flocculation of the tetraethyl orthosilicate / ethanol / hydrochloric acid (TEOS / EtOH / HCl) encapsulant mixture.

[0117] Column preparation

[0118] The column was packed with 317g Dowex 50W x 8 to obtain a 400 mL bed volume.

[0119] Step 1 - Washing: To remove residual sodium cations, the column was eluted with 2.5 L of deionized water at pH 6 for 5 to 10 minutes.

[0120] Step 2 - Reconditioning: To remove bound sodium cations, wash the column with four batches of 400 mL 7% HCl, from one end to the other. The HCl contact time on the column was 45 minutes.

[0121] Step 3 - Washing: Same as Step 1.

[0122] Ste...

Embodiment 2

[0139] Embodiment 2: prepare the silica of adsorption amaranth (acid red No. 27)

[0140] This red dye is soluble in water, but it is insoluble in ethanol. However, since it does not flocculate when blended with the TEOS mixture, it is not necessary to ion-exchange the aqueous solution (as done for the tartrazine in Example 1). Also, although the dye is insoluble in ethanol, it can be used directly by increasing the proportion of water in the aerosol mixture.

[0141] sample preparation

[0142] Two separate batches of colored silica were prepared using 10.4 g TEOS, 5.4 g pH 2 HCl, and 12.0 g ethanol. The components were mixed together and the mixture was left stirring for 30 minutes. Theoretically, the mixture should provide 3 g of silica after atomization. Therefore, the amount of addition of amaranth solution (available from Sigma, catalog number A1016-100G (CAS number: 915-67-3)) was calculated based on this amount of silica. As follows: 0.3g amaranth powder and 1...

Embodiment 3

[0146] Embodiment 3: prepare the silica that adsorbs wool poppy red (FD&C blue No. 1)

[0147] This blue dye is soluble in water and ethanol, and it does not require ion exchange of the solution.

[0148] sample preparation

[0149] Two batches of colored silica were prepared using 10.4 g TEOS, 5.4 g HCl (pH 2) and 8.0 g ethanol, respectively. The components were mixed together and the mixture was left stirring for 30 minutes. Theoretically, the mixture should provide 3 g of silica after atomization. Therefore, the calculation of the addition amount of the wool poppy red solution is based on this amount of silica. It was as follows: 0.3 g of Elephanta powder (available from Sigma / Aldrich, Cat. No. 861146-25G (CAS No. 3844-45-9)) and 2.0 g of HCl (pH 2) in 3 g of ethanol. The two mixtures were mixed together and allowed to stir for 10 minutes. Subsequently, as in Example 1, the mixture was spray-dried, heated, washed, the particles were separated and the particle size ...

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Abstract

According to the invention, a cosmetic composition is provided comprising: (a) amorphous particles, each amorphous particle comprising a homogeneous distribution of one or more dyes encapsulated by an amorphous, siliceous encapsulating agent, wherein the amorphous particle comprises from 3% to 20%, preferably 5% to 15%, more preferably 8% to 12% dye, by weight of the particle; (b) a cosmetically acceptable carrier.

Description

field of invention [0001] The present invention relates to cosmetic preparations comprising encapsulated dyes. Background of the invention [0002] In the field of cosmetics where it is desired to change the color of skin and hair for aesthetic purposes, the supply of dyes is very important. [0003] Currently, cosmetic compositions often contain pigments that do not provide the range of colors desired by professional cosmetic formulators. Organic pigments may offer a solution to this problem, but the use of such substances within the cosmetic field is limited due to reasons such as safety and other adverse effects such as skin staining. One way to alleviate the problems associated with organic dyes is to incorporate them into other materials. [0004] Particles incorporating dyes for use in the field of the invention are described in WO-A-2004 / 081222. This document describes the preparation of encapsulated dyes using the well-known sol-gel method, which refers to an emul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61Q1/02A61Q1/06A61Q1/10A61Q5/02A61Q5/12A61Q19/00A61K8/11A61K8/25
CPCA61Q1/02A61Q5/065A61Q1/10A61K8/11A61K8/25A61Q1/06A61Q5/02A61Q19/00A61K2800/43A61K2800/413A61K2800/412A61K8/0204A61Q5/12A61K8/0287
Inventor P·C·A·阿尔伯利亚斯R·W·科克里A·F·史蒂芬斯
Owner NOXELL CORP
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