HIGH-GLOSS MULTILAYER EFFECT PIGMENTS HAVING A NARROW SIZE DISTRIBUTION, AND METHOD FOR THE PRODUCTION THEREOF

Multilayer pearlescent pigments based on platelet-shaped transparent substrates with an optically active coating, where the optically active coating includes at least a) a nonabsorbing high-index layer A having a refractive index n 1.8, b) a low-index layer B having a refractive index n<1.8 havin...

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Bibliographic Details
Main Authors GRUENER MICHAEL, SCHUMACHER DIRK, KAUPP GUENTER
Format Patent
LanguageEnglish
Published 03.11.2011
Subjects
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
REFRACTORIES
SLAG
SPRAYING OR ATOMISING IN GENERAL
TRANSPORTING
TREATMENT OF NATURAL STONE
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Summary:Multilayer pearlescent pigments based on platelet-shaped transparent substrates with an optically active coating, where the optically active coating includes at least a) a nonabsorbing high-index layer A having a refractive index n 1.8, b) a low-index layer B having a refractive index n<1.8 having an optical layer thickness >150 nm, c) an absorbing high-index layer C having a refractive index n 1.8 and also, d) optionally an outer protective layer D, wherein the multilayer pearlescent pigments have a cumulative frequency distribution of the volume-averaged size distribution function, with the indices D10, D50, D90 and a span D of 0.7-1.4, the span D being calculated in accordance with the formula D=(D90−D10)/D50. The disclosure further relates to a method for producing these multilayer pigments, and to their use.
Bibliography:Application Number: US201013143386