Patent · US Expired

Preparation of transparent golden yellow, thermally stable two-phase pigments of the general formula xZnO.ZnFe.sub.2 O.sub.4

US4629513A · kind A · utility

1Cited by

4References

3Claims

0Family size

Assignee

BASF SE

Inventors

Werner Ostertag · Havelsee, DE
Roland Bauer · West Milford, US
Gustav Bock

Key dates

Filing date	Mar 27, 1985
Grant date	Dec 16, 1986
Priority date	—
Expiry date	Mar 27, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2004/84
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Transparent, golden yellow, thermally stable two-phase pigments of the general formula xZnO.ZnFe.sub.2 O.sub.4, where x is from 0.5 to 1.5, are prepared by a method in which the pH of an aqueous phase which contains transparent iron oxide yellow in suspension and zinc ions in solution is brought to 7-10, and the product is treated at above 200.degree. C. before or after being isolated from the aqueous phase.

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