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US 5,958,126 AGranted
Bismuth vanadate pigments
AssigneeBASF SE
InventorsJorg Adel, Boubacar Camara, Norbert Mronga
Life of this patent
Estimating the term…
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).
Claims17
A bismuth vanadate pigment of the formula:
- (Bi.sub.4 V.sub.2 O.sub.11).sub.1-x.(BiVO.sub.4).sub.x,
- wherein 0.2.ltoreq.x<0.9, further comprising from 0-0.5% by weight of phosphorous in the form of bismuth phosphate, the pigment having a CIELAB hue angle ranging from 64-91.degree., a chroma of from 72-95 and a lightness.gtoreq.62 as determined at a measuring angle of 45.degree. and standard illuminant D65.
Dependencies are inferred from the claim text.