Titanium-iron based composite oxide pigment and method for production thereof
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United States of America Patent
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Apr 1, 2003
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N/A
app pub date -
Feb 7, 2002
filing date -
Mar 24, 2000
priority date (Note) -
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Abstract
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 (M.sub.1-x.cndot.Fe.sub.x)O.cndot.2TiO.sub.2 or the composition formula (Fe.sub.1-y.cndot.Al.sub.y).sub.2 O.sub.3.cndot.TiO.sub.2 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.ltoreq.Fe/Ti.ltoreq.4.5, 0.ltoreq.Al/Ti.ltoreq.6.5 and 0.ltoreq.M/Ti.ltoreq.2.6, and x and y are in the respective ranges of 0.ltoreq.x<1 and 0.ltoreq.y<1.
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