Spherical color pigments, process for their production and use thereof
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Nov 14, 1997
filing date -
Nov 14, 1996
priority date (Note) -
Expired
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Abstract
The invention relates to spherical colored pigments having an average particle diameter of less than 10 .mu.m on the basis of an oxide, a mixed oxide or a silicate. The pigments are obtainable by means of spray-pyrolysis technology: a solution containing oxide-forming or silicate-forming metal compounds is converted into an aerosol and the latter is fed, preferably after predrying, to a pyrolysis reactor; the pigment is separated from the pyrolysis gas. The colored pigments according to the invention are suitable for the production of ceramic decorations and for the coloring of plastics, synthetic foils, fibers and also lacquers. By reason of the spherical shape, unusual technical application properties are achieved.
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