Colored interference pigments
AssigneeMerck Patent GmbH
InventorsLilia Heider, Manuela Loch, Nicole Schupp, Helge Kniess
Life of this patent
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Abstract
The present invention relates to colored interference pigments based on multicoated, platelet-shaped substrates, which are distinguished in that they comprise (A) a colored coating having a refractive index of n>1.8, (B) a colorless coating having a refractive index of n>1.8, (C) a colorless coating having a refractive index of n≦1.8, (D) a colorless coating having a refractive index of n>1.8, and optionally (E) an outer protective layer, and to their use in paints, surface coatings, printing inks, plastics, ceramic materials, glasses, for laser marking, in cosmetic formulations and for the production of pigment preparations and dry preparations.
Claims34
A coloured interference pigment comprising platelet-shaped substrates having:
- (A) a coloured coating having a refractive index of n>1.8,
- (B) a colourless coating having a refractive index of n>1.8,
- (C) a colourless coating having a refractive index of n≦1.8,
- (D) a colourless coating having a refractive index of n>1.8, and optionally
- (E) an outer protective layer,
- wherein coating (A) is on top of said substrate, coating (B) is between coating (A) and coating (C), and, if layer (B) is present, coating (D) is between coating (C) and layer (E).
A coloured interference pigment comprising platelet-shaped substrates having:
- (A) a coloured coating having a refractive index of n>1.8,
- (B) a colourless coating having a refractive index of n>1.8,
- (C) a colourless coating having a refractive index of n≦1.8,
- (D) a colourless coating having a refractive index of n>1.8, and optionally
- (E) an outer protective layer,
- wherein the pigment is selected from the following:
- substrate+Fe2O3 (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Fe3O4 (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Fe2O3 (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+Fe3O4 (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+V2O5 (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+MnO2 (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+MnO2 (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+Ag2O (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Ag2O (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+CoO (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Cr2O3 (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Cr2O3 (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+Ti suboxides (A)+TiO2 (B)+SiO2 (C)+TiO2 (D);
- substrate+Ti suboxides (A)+TiO2 (B)+Al2O3 (C)+TiO2 (D);
- substrate+Fe2O3 (A)+ZrO2 (B)+SiO2 (C)+ZrO2 (D);
- substrate+Fe2O3 (A)+ZnO (B)+SiO2 (C)+ZrO2 (D);
- substrate+Fe3O4 (A)+ZrO2 (B)+SiO2 (C)+ZrO2 (D);
- substrate+Fe3O4 (A)+ZrO2 (B)+SiO2 (C)+TiO2 (D);
- and
- substrate+Fe2O3 (A)+TiO2 (B)+SiO2 (C)+ZrO2 (D), and
- in each case is optionally provided an outer protective layer (E).
Dependencies are inferred from the claim text.