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INORGANIC EFFECT PIGMENTS
专利权人:
BASF COLORS &; EFFECTS GMBH
发明人:
Benjamin MOHR,Christopher SICHMELLER
申请号:
US16500668
公开号:
US20200115558A1
申请日:
2017.04.04
申请国别(地区):
US
年份:
2020
代理人:
摘要:
An inorganic, non-quarter wave, heterogeneous multilayer effect pigment includes a platy substrate comprising an absorbing optically active metal oxide layer thereon, having an optical thickness from about 20 nm to about 400 nm; a layer of low refractive index material on the absorbing optically active metal oxide layer and having an optical thickness from about 10 nm to about 500 nm; and an outermost optically active layer of a non-absorbing high refractive index material on the low refractive index material and having an optical thickness from about 50 nm to about 1000 nm. The multilayer effect pigment exhibits a blue reflectance ratio (BRR) of at least 3, according to the equation: BRR=(Blue Max)/(Green Min); where Blue Max is the maximum reflectance exhibited over wavelengths 380 nm to 450 nm; and Green Min is the minimum reflectance exhibited over wavelengths 450 nm to 600 nm.
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