Coated metal effect pigments, method of production and use thereof

A coated flaky metal effect pigment comprising a metal effect flake as substrate, wherein the substrate is selected from aluminum or aluminum alloys and including the following consecutive coating layers:

• a) optionally a discontinuous or a continuous layer of Mo-oxide,
• b1) an inorganic metal oxide layer comprising over 50% SiO2,
• c1) a hybrid layer comprising SiO2 modified by a diphenyl silane, a phenyl silane or mixtures thereof,
• or
• c2) a hybrid layer comprising SiO2 modified by a diphenyl silane, a phenyl silane or mixtures thereof, and
• b2) an inorganic metal oxide layer comprising over 50% SiO2, wherein the characterization with 13C-NMR-MAS spectroscopy yields signals attributable to diphenyl moieties of the D-silanes and optionally 13C-NMR-MAS signals attributable to organic moieties connected with T-silanes and wherein the total amount of these 13C-NMR signals is in a range of 80% to 100% of all 13C-signals observed.

A coated flaky metal effect pigment comprising a metal effect flake as substrate, wherein the substrate is selected from aluminum or aluminum alloys and including the following consecutive coating layers:

• a) optionally a discontinuous or a continuous layer of Mo-oxide,
• b1) an inorganic metal oxide layer comprising over 50% SiO2,
• c1) a hybrid layer comprising SiO2 modified by a diphenyl silane, a phenyl silane or mixtures thereof,
• or
• c2) a hybrid layer comprising SiO2 modified by a diphenyl silane, a phenyl silane or mixtures thereof, and
• b2) an inorganic metal oxide layer comprising over 50% SiO2, wherein the total thickness of the coatings a), b) and c) is in a range of 30 to 60 nm.