Cosmetic body pigment and process for preparing the same
AssigneeMerck Patent GmbH
InventorYukitaka Watanabe
Life of this patent
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Abstract
A cosmetic body pigment having a good skin feel, no blue color, a high soft focusing effect (low viewing angle dependency of reflected light intensity), a natural color tone against the skin, and a moderate hiding power (wrinkle hiding effect) is provided. The cosmetic body pigment is characterized in that TiO2 fine particles are deposited separately with form of mono layer on the surface of a thin-platelet like substrate.
Claims28
A cosmetic body pigment, comprising a TiO2 particle mono layer on a thin-platelet shaped substrate.
A cosmetic body pigment, comprising TiO2 particles in a platelet-shaped substrate, having a mean center-to-center distance between TiO2 particles among six closest neighboring particles not smaller than one and a half times the mean particle diameter of said TiO2 particles.
A process for preparing a cosmetic body pigment, comprising:
- suspending thin-platelet shaped substrates in water and adding TiO2 particles thereto while stirring;
- depositing said TiO2 fine particles onto the surface of a thin-platelet like substrate by changing the pH value of the suspension containing said thin-platelet shaped substrates and said TiO2 particles;
- and
- collecting solids components of said suspension by filtering, and washing and optionally drying.
A process for preparing a cosmetic body pigment, comprising depositing previously prepared TiO2 particles onto a platelet-shaped substrate.
Dependencies are inferred from the claim text.