Patent · US Active

Pearlescent pigments on the basis of fine and thin synthetic substrates

US10125261B2 · kind B2 · utility

0Cited by

8References

18Claims

0Family size

Assignee

ECKART GmbH · DE

Inventors

Ulrich Schmidt · Flörsheim, DE
Michael Grüner · Zwingenberg, DE
Dirk Schumacher · Pegnitz, DE
Günter Kaupp · Jessenitz Siedlung, DE
Barbara Mendler · Meersburg, DE

Key dates

Filing date	Oct 10, 2010
Grant date	Nov 13, 2018
Priority date	—
Expiry date	Jan 18, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09C2220/106
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to pearlescent pigments comprising a largely transparent platelet-shaped synthetic substrate having a density ρS and at least one optically active coating having a density ρM, the substrate having an average size d50 from a range from 2.0 μm to 8.0 μm and an average height hS from a range from 40 nm to 110 nm and the total lead content of the pearlescent pigments is ≤10 ppm. The invention further relates to a method for producing the pearlescent pigments, and also to the use thereof.

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