| abstract |
The present invention relates to an effect pigment comprising as a substrate a glass flake with a coating, wherein the coating comprises at least one layer of at least one high refractive material (the material has a refractive index of at least 1.8), and / or at least one translucent metal material. At least one layer, wherein the glass flakes comprise the following composition based on the weight of the glass flakes:n n n 65-75 wt .-% silicon oxide, preferably SiO 2 n n n 2-9 wt .-% aluminum oxide, preferably Al 2 O 3 n n n 0.0-5 wt .-% calcium oxide, preferably CaOn n n 5-12 wt .-% sodium oxide, preferably Na 2 On n n 8-15 wt .-% boron oxide, preferably B 2 O 3 n n n 0.1-5 wt .-% titanium oxide, preferably TiO 2 n n n 0.0-5 wt .-% zirconium oxide, preferably ZrO 2 .n n n The invention also relates to a process for the preparation of said effect pigments and to the use of said effect pigments. The invention also relates to a coating formulation based on said effect pigment. |