| 摘要 |
The present invention relates to interference pigments based on transparent, low-refractive-index, flake-form substrates which have a high-refractive-index coating consisting of TiO2 having a layer thickness of 20-200 nm and optionally an outer protective layer, and to the use thereof in paints, coatings, printing inks, security printing inks, plastics, button pastes, ceramic materials, glasses, for seed coloring, as dopants in the laser marking of plastics and papers, as additive for the laser welding of plastics, as additive for coloring in the foods and pharmaceuticals sectors, and in cosmetic formulations and for the preparation of pigment compositions and dry preparations. |
| 主权项 |
1. An interference pigment, which consists of a low-refractive-index, transparent, flake substrate having a high-refractive-index coating consisting essentially of TiO2 having a layer thickness of 20-200 nm and optionally further coated with an outer protective layer
wherein the pigment exhibits a color flop from a short wave color at a steep viewing angle to a long wave color at a flat viewing angle, wherein the substrate has an average thickness of 0.1 to 1 μm and a size in the other two dimensions of between 5 and 200 μm, wherein the standard deviation of the thickness of the substrate flakes is ≦15%, based on their average thickness, and wherein the TiO2 is in the rutile modification and optionally contains a small amount of tin oxide for rutilization. |
