Interference pigments
AssigneeMerck Patent GmbH
InventorsMichael Termer, Jutta Zur Lage, Anett Moschner, Lilia Heider
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Abstract
The present invention relates to interference pigments based on platelet-shaped substrates which are coated with at least four high refractive layers and to the use thereof, inter alia in paints, coatings, printings inks, plastics and in particular in cosmetic formulations. The interference pigments show a moderate chroma and can be used as effect pigments, as filler pigments and as protection agent against near infrared radiation, VIS and high energy light.
Claims14
An interference pigment based on a platelet shaped substrate with a particle diameter in the range 1-100 μm characterized in that the substrate is coated on the surface with at least four layers (A) to (D),
- (A) is a refractive index layer which consist of SnO2
- (B) is a refractive index layer which consist of undoped TiO2
- (C) is a refractive index layer which consist of SnO2
- (D) is a refractive index layer which consist of undoped TiO2
- and optionally
- (E) an outer protective layer.
Dependencies are inferred from the claim text.