GLASS FLAKES, AND COSMETIC CONTAINING THE SAME

• US 20100092527A1
• Filed: 04/11/2008
• Published: 04/15/2010
• Est. Priority Date: 04/25/2007
• Status: Abandoned Application

• Current Assignee: Nippon Sheet Glass Company Limited
• Original Assignee: Nippon Sheet Glass Company Limited
• Inventors: Maeda, Takeshi, Otani, Kazuhiro, Yagyu, Tomohiro
• Application Number:
  US12/596,724
• Publication Number:
  US 20100092527A1
• Time in Patent Office: Days
• US Class Current: 424/401
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 2800/624 by macromolecular compounds
• CPC Class Codes: A61K 2800/651 The particulate/core comprising inorganic material
• CPC Class Codes: A61K 8/0262 Characterized by the central layer
• CPC Class Codes: A61K 8/26 Aluminium; Compounds thereof
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: C03B 37/005 Manufacture of flakes
• CPC Class Codes: C03C 17/30 with silicon-containing compounds
• CPC Class Codes: C09C 1/0018 uncoated and unlayered plate-like particles
• CPC Class Codes: C09C 2200/102 the core consisting of glass or silicate material like mica or clays, e.g. kaolin
• CPC Class Codes: C09C 2200/301 Thickness of the core
• CPC Class Codes: C09C 2200/407 Organosilicon materials, e.g. silanes, silicones

Abstract

The glass flakes of the present invention each include a glass flake substrate and a coating layer coating the surface of the glass flake substrate. The glass flake substrates have an average thickness of 0.1 to 1.0 μm, and an average particle size of 1 to 100 μm. The coating layers are formed of methyl hydrogen silicone and the content percentage of the coating layers is 0.05 to 2.50 mass % as determined by ignition loss at 625±20° C.

Claims

1. Glass flakes each comprising:

a glass flake substrate; and

a coating layer coating the surface of the glass flake substrate, wherein;

the glass flake substrates have an average thickness of 0.1 to 1.0 μ

m, and an average particle size of 1 to 100 μ

m;

the coating layers are formed of methyl hydrogen silicone; and

the content percentage of the coating layers is 0.05 to 2.50 mass % as determined by ignition loss at 625±

20°

C.

2. The glass flakes according to claim 1, wherein the content percentage of the coating layers is 0.10 to 1.00 mass % as determined by ignition loss at 625±

20°

C.

3. The glass flakes according to claim 1, wherein the glass flake substrate is free from boron as a component.

4. A cosmetic containing the glass flakes according to claim 1.