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US 2020/0339820 A1Published application
Effect pigments
AssigneeMerck Patent GmbH
InventorsGerhard PFAFF, Stephanie ANDES, Klaus AMBROSIUS, Ralf PETRY, Michael ROESLER, Sabine SCHOEN
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Abstract
The present invention relates to effect pigments which are based on flake-form substrates having a circular form factor of 1.2-2 and are coated with at least one high-refractive-index layer, and to the use thereof, inter alia in paints, coatings, printing inks, plastics and in cosmetic formulations.
Claims20
An effect pigment comprising a flake-form substrate having a circular form factor of circumference2/area standardized to a circle of 1.2-2 coated with at least one high-refractive-index layer having a refractive index of n≥1.8.
Dependencies are inferred from the claim text.