Bismuth vanadate pigments

US5958126A · kind A · utility

Assignee

• BASF SE

Inventors

• Jorg Adel · Ludwigshafen, DE
• Boubacar Camara · Auenwald, DE
• Norbert Mronga · Dossenheim, DE

Key dates

• Filing date: Oct 27, 1997
• Grant date: Sep 28, 1999
• Expiry date: Oct 27, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2993
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Bismuth vanadate pigments of the formula (Bi.sub.4 V.sub.2 O.sub.11).sub.1-x.(BiVO.sub.4).sub.x, where 0.ltoreq.x<0.9, further comprising from 0 to 0.5% by weight of phosphorus in the form of bismuth phosphate, are characterized by a CIELAB hue angle of from 64 to 91.degree., a chroma of from 72 to 95 and a lightness.gtoreq.62 (measuring angle 45.degree., standard illuminant D65).