Cosmetics

A technology for cosmetics and oxide films, applied in cosmetics, cosmetics, cosmetic preparations, etc., can solve problems such as denaturation, discoloration, metal allergic reactions, etc., and achieve the effect of improving surface smoothness, preventing adhesion or agglomeration, and improving feeling

Inactive Publication Date: 2006-03-22
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these powders (pigments) having a metal film have a problem that, when mixed into cosmetics, the organic components in the cosmetics may decompose due to the leaching of metal ions or the performance of a catalytic function since the outermost surface is metal. discoloration or denaturation
In addition, metal ions may cause metal hypersensitivity reactions, and although noble metals such as platinum and gold are not easily ionized, it has been reported that even slight leaching of metals may cause metal hypersensitivity reactions when human skin is in direct contact with, for example, cosmetics in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0036] First, a suitable material selected from Metashine PS series glass flakes with a silver film was used as a base material with a metal thin film, and a silicon dioxide film was formed on its surface by the following method.

[0037] The Metashine PS of 50g is suspended in the pure water of 0.5 liters, and simultaneously water bath is kept under the temperature of 75 ℃, suitably weighs sodium silicate solution (silicon dioxide solid content 37.1%, by Wako Pure Chemical Industries, Ltd .preparation) and then diluted 10 times with pure water to obtain a solution which was added to the above suspension. At the same time the pH of the suspension was maintained at 9.2-9.4 with 3.5% by weight hydrochloric acid. After the addition was complete, stirring was continued at 75°C for 30 minutes. Thereafter, the suspension was filtered with filter paper, and the filtered solid was recovered, and after washing with water and making the pH neutral, dried at 100° C. for 2 hours, thereby...

Embodiment 1-3

[0047] The tests of the above examples were carried out on different types of Metashine PS not formed with a silicon dioxide film. The results are described in Table 2 below.

[0048] Comparative example

1

2

3

Average thickness (μm)

Average particle size (μm)

Silica film wt%

Silver leaching rate1(ppm)

Silver leaching rate2(ppm)

discoloration of organic matter

5.0

90

0

9.2

3.3

slight yellow

1.3

80

0

131.2

1.9

yellow

1.3

15

0

261.1

1.4

yellow

[0049] It can be seen from Table 1 that for all the powders with a silicon dioxide film on it, the leaching rate of silver into water is very low, no more than 3.3ppm, and the leaching rate of silver into organic solvents is also very low, no more than 1.2ppm . In addition, it can be seen that the discoloration effect of organic matter does not occur...

Embodiment 7

[0053]50 g of a silver-coated glass flake (Metashine PS manufactured by Nippon Sheet Glass Go. Ltd.) having an average thickness of 1.3 μm and an average particle diameter of 80 μm was suspended in 0.5 liter of pure water, and kept in a water bath at 75° C. A solution obtained by diluting a sodium silicate solution (silica solid content 37.1%, manufactured by Wako Pure Chemical Industries, Ltd.) 10 times with pure water was added to the above suspension under temperature. This was done while maintaining the pH of the suspension at 9.2-9.4 with 3.5% by weight hydrochloric acid. After the addition, stirring was continued at 75° C. for 30 minutes, whereby a silicon dioxide film was formed on the silver film. The adhesion ratio of the silicon dioxide film was 3% by weight relative to the silver-coated glass flake, which was equivalent to Example 4 above. Subsequently, a solution obtained by diluting 1.8 g of aluminum chloride hexahydrate 20 times with pure water was slowly added ...

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Abstract

A cosmetic is provided that contains a powder that exhibits a shininess characteristic of a metal film and yet is not prone to leaching out of metal ions, whereby the cosmetic is not prone to causing discoloration or degeneration, and is not prone to bringing about a metal allergy. The powder contained in the cosmetic is comprised of a base material, and a metal film and a metal oxide film formed in this order on the base material.

Description

technical field [0001] The present invention relates to a cosmetic for make-up containing a powder covered with a metal thin film and having a shiny appearance. Background technique [0002] Make-up cosmetics are applied to the nails, around the eyes or on the lips, thereby coloring or changing the impression of these body parts. In recent years, there has been a trend in which glitter is desired, and thus the demand for metal flake-containing cosmetics is increasing. Powders containing a metal-coated base material, especially metal-coated particles in the form of platelets (e.g. mica or glass flakes), will have a shimmering high metallic luster and when It has a remarkable effect when blended in cosmetics as a metal flake (laméagent). Japanese Laid-open Patent Publication (Kokai) No. 62-108805 discloses a cosmetic in which a precious metal-containing pigment is mixed, and the pigment is obtained by coating gold, platinum, palladium, silver, etc. on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/19A61K8/02A61Q1/00A61Q1/06A61Q1/10A61Q3/02A61K8/11A61K8/25A61K8/26A61K8/28A61Q1/04
CPCA61Q3/02A61Q1/06A61K2800/412A61K8/28A61K8/26A61K8/02A61K8/25A61K8/19A61K2800/63A61K2800/651A61K8/11A61K8/0266A61Q1/10A61Q1/04A61Q1/00A61Q19/00
Inventor 横川浩司猪野寿一石聪
Owner NIPPON SHEET GLASS CO LTD
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