Iron oxide pigment for cosmetic compositions and cosmetic composition containing iron oxide pigment
The use of a specifically formulated iron oxide pigment with controlled Fe, FeO, and Fe2O3 content, along with a spinel and corundum structure, addresses the challenge of low saturation in dark-colored skin cosmetics, ensuring high coloring power and a natural appearance without color separation.
Patent Information
- Application Number
- KR1020237039544
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-05-18
- Filing Date
- 2022-03-25
- Publication Date
- 2026-08-05
- Estimated Expiration
- 2042-03-25
AI Technical Summary
Existing cosmetic compositions with iron oxide pigments struggle to achieve high saturation and coloring power in low lightness areas, particularly for dark-colored skin, leading to issues like color separation, powdery texture, and difficulty in achieving a natural appearance.
An iron oxide pigment with a specific composition and structure, including a spinel and corundum structure, Fe content between 680-702 g/kg, FeO content of 30 g/kg or less, Fe2O3 content of 939 g/kg or more, and total FeO and Fe2O3 content of 968 g/kg or more, along with controlled particle size and heavy metal content, is used to enhance saturation and coloring power.
The pigment exhibits high saturation and coloring power even in low lightness areas, providing a smooth texture and ease of application, while minimizing health risks and preventing color separation, suitable for dark-colored skin cosmetics.