Colored aluminum pigments, process for producing them and their use
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United States of America Patent
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Aug 3, 1999
Grant Date -
N/A
app pub date -
Sep 2, 1997
filing date -
Jan 18, 1995
priority date (Note) -
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Abstract
The invention concerns colored aluminum pigments comprising flake-form aluminum substrates which are coated with a metal oxide layer. The pigments are produced by a process which involves the steps of mixing a ground color pigment with a flake-form aluminum in the presence of a solvent. A metal acid ester is then added to the mixture and is then hydrolyzed to form a metal oxide layer on the aluminum substrate, followed by removal of the solvent and drying of the pigment. The pigments are useful as special-effect pigments in paints, lacquers, coatings, plastic materials, printing inks and cosmetic preparation.
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