3D structural siliceous color pigments
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United States of America Patent
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Jun 29, 2004
Grant Date -
Jan 9, 2003
app pub date -
Nov 30, 2001
filing date -
Nov 30, 2000
priority date (Note) -
Expired
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Abstract
The invention relates to particles with opalescent effect--especially 3-D structural color pigments-based on solid colloidal crystals of monodispersed spheres and the manufacturing processes suitable for large-scale production of such solid colloidal crystal products. The particles with opalescent effect contain a sphere based crystal structure (or super-lattice) built up by monodisperse spheres and one or more secondary types of much smaller colloidal particles occupying partially or completely the empty spaces between the monodisperse spheres.
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