Patent · US Active

High-gloss multilayer effect pigments having a silver interference color and a narrow size distribution, and method for the production thereof

US8728227B2 · kind B2 · utility

13Cited by

19References

13Claims

0Family size

Assignee

ECKART GmbH · DE

Inventors

Dirk Schumacher · Pegnitz, DE
Michael Grüner · Zwingenberg, DE
Günter Kaupp · Jessenitz Siedlung, DE

Key dates

Filing date	Aug 9, 2010
Grant date	May 20, 2014
Priority date	—
Expiry date	Aug 9, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09C2200/408
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Multilayer pearlescent pigments with a silver interference color, based on platelet-shaped transparent substrates with an optically active coating, where the optically active coating includes at least The multilayer pearlescent pigments have the indices D10, D50, D90 from the cumulative frequency distribution of the volume-averaged size distribution function, with a span ΔD of 0.7 -1.4, the span ΔD being calculated in accordance with the formula ΔD =(D90 - D10)/D50. The invention further relates to a method for producing these multilayer pearlescent pigments, and also to their use.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.