METALLIC LUSTRE PIGMENTS BASED ON SUBSTRATE FLAKES WITH A THICKNESS OF 1-50 nm Russian patent published in 2018 - IPC C09C1/64 C09C1/00 C09C3/06 B82B3/00 B82Y30/00 A61K8/19 A61K8/26 A61Q1/02 C03C1/04 C04B33/14 C09D11/00 C08K3/08 C08K3/20 

FIELD: technological processes.

SUBSTANCE: invention can be used for coloring paints, printing inks, inks, polymeric materials, glasses, ceramic products and decorative cosmetic preparations. Metallic luster pigment comprises aluminum substrate plates having a thickness of 1 to 50 nm, monolithically constructed and, optionally, passivated and enveloped by at least coating B of metal oxide, having a refractive index of at least 1.9. Coating B has a thickness of at least 50 nm, and comprises a metal oxide, selected from the group consisting of iron (III) oxide, chromium (III) oxide, vanadium (V) oxide, titanium (III) oxide, titanium dioxide and/or zirconium oxide. Between the surface of aluminum substrate plates and the coating B there is at least one coating A, enveloping the substrate plates and consisting of at least one oxide, having a low refractive index of at most 1.8, and selected from the group consisting of SiO₂, B₂O₃, MnO₂, MgO, GeO₂ and Al₂O₃. Substrate plates further comprise coating C, different from the underlying coating B and consisting of silicone dioxide, silicon oxide hydrate, aluminum oxide, zinc oxide, tin oxide, titanium dioxide, zirconium oxide, iron (III) oxide or chromium (III) oxide.

EFFECT: invention provides a metallic lustre pigment having a higher coverage and allows reducing its combustibility and explosion hazard.

7 cl, 4 dwg, 1 tbl, 3 ex