Effect Pigment And The Use Thereof In Cosmetics And In The Foods And Pharmaceuticals Sector
OwnerGerhard Pfaff, Johann Dietz +4inventors
InventorsGerhard Pfaff, Johann Dietz, Cornelia Foerderer, Xenia Petsitis, Doreen Warthe, Veronika Hochstein
Life of this patent
Estimating the term…
Abstract
The present invention relates to intensely coloured and light-stable effect pigments based on transparent, undoped SiO2 flakes, which are distinguished by the fact that they are covered with an iron-oxide layer having a thickness of 30-150 nm, and all SiO2 flakes have an identical thickness, and the thickness of the SiO2 flakes is 250-400 nm, and to the use thereof in pigment mixtures, in cosmetic formulations and for colouring foods and pharmaceutical products.
Claims13
1-13. (canceled)
A pigment mixture containing at least two compounds A and B, wherein component A is effect pigments comprising transparent, undoped SiO2 flakes, covered with an iron-oxide layer having a thickness of 30 - 150 nm, said SiO2 flakes having an identical thickness, said thickness of the SiO2 flakes being 250 - 400 nm, and component B comprises inorganic pigments, organic pigments, dyes and/or fillers, which are flake-form, needle-shaped, spherical or irregularly shaped particles.
Dependencies are inferred from the claim text.