Titanium-iron complex oxide pigments and processes for...

Details Titanium-iron complex oxide pigments and processes for... Titanium-iron complex oxide pigments and processes for...

C - Chemistry, Metallurgy

01

G

C01G 49/00 (2006.01) C01G 23/00 (2006.01) C01G 23/04 (2006.01) C09C 1/24 (2006.01) C09C 1/36 (2006.01)

Patent

CA 2374489

The present invention provides a yellow pigment which contains a titanium-iron complex oxide of the pseudo-brookite type and produces a stabilized color more yellowish than conventionally and which is universally usable for coloring plastics, ceramics and coating compositions. The pigment of the invention is a titanium-iron complex oxide pigment which contains a pseudo-brookite complex oxide represented by the composition formula (M1-x.cndot.Fe x)O.cndot.2TiO2 or the composition formula (Fe1-y.cndot.Al y)2O3.cndot.TiO2 wherein M is one of the bivalent metals Mg, Sr and Zn, the ratios of Fe, Al and M to Ti are in the respective ranges of 0.3<=Fe/Ti<=4.5, 0<=Al/Ti<=6.5 and 0<=M/Ti<=2.6, and x and y are in the respective ranges of 0<=x < 1 and 0<=y < 1.

L'invention concerne un pigment d'oxyde composite à base de fer et de titane, caractérisé en ce qu'il comprend un oxyde composite de type pseudobrookite représenté par une formule empirique : (M1-x . Fex) O . 2TiO2 ou une formule empirique (Fe1-y . Aly) 2O3 . TiO2, où M indique un des métaux bivalents Mg, Sr et Zn, les rapports de Fe, Al et M à Ti se situant dans les plages : 0,3 </= Fe/Ti </= 4,5, 0 </= Al/Ti </= 6,5 et 0 </= M/Ti </= 2,6, et x et y se situent respectivement dans les plages : 0 </= x < 1 et 0 </= y < 1. Le pigment est amélioré dans le jaune et il montre un développement de couleur plus stable comparé aux pigments d'oxyde composites classiques à base de fer et de titane; ainsi, ledit pigment peut être utilisé d'une manière générale pour la coloration des plastiques, des céramiques, des revêtements et analogue.

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