	US 11,746,240 B2
	Interference pigments
Stephanie Andes, Darmstadt (DE); Ulrich Schoenefeld, Darmstadt (DE); Thomas Krasemann, Darmstadt (DE); Manfred Thon, Darmstadt (DE); Martina Welsch, Darmstadt (DE); Ralf Schweinfurth, Darmstadt (DE); and Melanie Mechthild Breidung, Wilmington, DE (US)
Assigned to Merck Patent GmbH, Darmstadt (DE)
Appl. No. 17/296,790
Filed by Merck Patent GmbH, Darmstadt (DE)
PCT Filed Sep. 25, 2020, PCT No. PCT/EP2020/076874 § 371(c)(1), (2) Date May 25, 2021, PCT Pub. No. WO2021/063823, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 102019006869.6 (DE), filed on Oct. 2, 2019.
Prior Publication US 2022/0356356 A1, Nov. 10, 2022
Int. Cl. C09C 1/00 (2006.01)

CPC C09C 1/0039 (2013.01) [C09C 1/0021 (2013.01); C09C 2200/1004 (2013.01); C09C 2200/301 (2013.01)]

18 Claims

1. Interference pigment based on a substrate mixture, wherein the substrate mixture consists of SiO₂flakes, which SiO₂flakes have at least 4 different thicknesses, and which SiO₂flakes are coated with at least one high-refractive-index layer.