Effect pigments

US9815970B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Steven Jones · Newmarket, CA
• Meaghan C. McGuire · Tarrytown, US
• James A. SIOSS · Beachwood, US
• Christopher Sichmeller · Elmsford, US
• Martin Saltzman · Nelsonville, US

Key dates

• Filing date: May 21, 2015
• Grant date: Nov 14, 2017
• Expiry date: Dec 2, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/403
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A high chroma effect pigment includes a platelet substrate and an optical coating formed on the platelet substrate. The optical coating includes a first high refractive index layer, a second high refractive index layer on the first high refractive index layer, and a diffused third material having a range of diffusion between 100% to partial diffusion in the first high refractive index layer, the second high refractive index layer, or both the first and the second high refractive index layers. The first and second high refractive index layers independently have a refractive index of about >1.65. The diffused third material is SiO2 or a metal oxide is different than the first and second high refractive index layers.