Multilayer interference pigment with transparent central layer
AssigneeMerck Patent GmbH
InventorsGerhard Pfaff, Gerd Bauer, Martin Friz, Matthias Kuntz, Christina Schank
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Abstract
Multilayer interference pigment consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of a metal or of a material of high refractive index and of a material of low refractive index either side of the central layer, the material of low refractive index preferably being magnesium fluoride or acrylate and the metal preferably being aluminium or chromium.
Claims15
A multilayer interference pigment in the form of pigment particles consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of:
- (a) a metal or a material of high refractive index and
- (b) a material of low refractive index, on either side of the central layer.
Dependencies are inferred from the claim text.