Patent · US Active

Process for producing haematite pigments

US12187623B2 · kind B2 · utility

0Cited by

2References

13Claims

0Family size

Assignee

LANXESS Deutschland GmbH · DE

Inventors

Larissa Schaufler · Essen, DE
Anna Weber-Czaplik · Dressendorf, DE
Carsten Rosenhahn · Kempen, DE
Christine Kathrein · Dressendorf, DE

Key dates

Filing date	Jan 15, 2020
Grant date	Jan 7, 2025
Priority date	—
Expiry date	Dec 13, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/80
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Process for producing a haematite pigment having an a* value greater than 20, especially greater than 25, CIELAB units measured as a full shade in alkyd resin to DIN EN ISO 787-25:2007, by reacting iron sulfate with oxygen in the presence of a pigment seed, characterized in that

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