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US 2026/0308384 A1Published application
Mid-shade red effect pigment
AssigneeSun Chemical Corporation
InventorsAron WOSYLUS, Katharina-Verena DORN, Heinrich WÖLK
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Abstract
The present invention is directed to a mid-shade red effect pigment with high chroma and lightness using a metal as flaky substrate which is coated with a colored absorbing layer of iron oxide or iron-oxide hydroxide.
Claims21
A mid-shade red effect pigment having a red-orange color between 25°≤h15≤45° comprising:
- a plate-shaped metal core;
- a silicon containing passivation layer on top of the plate-shaped metal core;
- and an iron oxide and/or iron-oxide hydroxide containing layer on top of the passivation layer;
- wherein the hue angle h15 is in the range of 25°≤h15≤45° the Brilliancy Factor BF is 140-165;
- and the hiding power is ΣdE<110;
- wherein the plate shaped metal core comprises aluminum flakes with the following characteristics:
- a. surface area (BET)≤4 m2/g;
- b. broadness of particle-size curve (Span)≤1.2;
- c. hiding power ΣdE<20;
- d. lightness L*15>153.
7 more elements
Dependencies are inferred from the claim text.