Pigment powders
AssigneeMerck Patent GmbH
InventorsPadma KAVIRATNA, Mark TELLEFSEN, Qingmin CHENG, Matthew EDDENS, Qinyun PENG
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Abstract
Disclosed are pigment powders containing only coated BiOCl flakes, which flakes area) BiOCl flakes having a coating containing yellow iron oxide Fe2O3*xH2O, optionally a colorant, optionally an adjuvant, and optionally SiO2, b) BiOCl flakes having a coating containing SiO2, optionally a colorant, and optionally an adjuvant, c) BiOCl flakes having a coating containing a colorant, SiO2, optionally yellow iron oxide Fe2O3*xH2O, and optionally an adjuvant, or d) BiOCl flakes having a coating containing Fe3O4 and optionally SiO2, to a process for the preparation of the pigment powders, and to the use thereof especially in cosmetic formulations.
Claims19
A pigment powder consisting of coated BiOCl flakes, which flakes are selected from the group consisting of
- a) BiOCl flakes having a coating comprising yellow iron oxide Fe2O3*xH2O, optionally a colorant, optionally an adjuvant, and optionally SiO2,
- b) BiOCl flakes having a coating comprising SiO2, optionally a colorant, and optionally an adjuvant,
- c) BiOCl flakes having a coating comprising a colorant, SiO2, optionally yellow iron oxide Fe2O3*xH2O, and optionally an adjuvant, and
- d) BiOCl flakes having a coating comprising Fe3O4 and optionally SiO2.
Dependencies are inferred from the claim text.