Title:
PARTICLES WITH OPALESCENT EFFECT
Document Type and Number:
WIPO Patent Application WO2002044301
Kind Code:
A3
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.
Inventors:
FU GUOYI (US)
LEWIS DIANE (US)
LEWIS DIANE (US)
Application Number:
PCT/EP2001/012788
Publication Date:
January 23, 2003
Filing Date:
November 05, 2001
Export Citation:
Assignee:
MERCK PATENT GMBH (DE)
FU GUOYI (US)
LEWIS DIANE (US)
FU GUOYI (US)
LEWIS DIANE (US)
International Classes:
C01B13/14; B01J19/00; C01B33/12; C01G1/02; C09C1/00; C09C1/30; C09D5/36; C09K9/00; (IPC1-7): C09K9/00; C09C1/30; C09C1/36; C09C3/00; C09C3/04
Domestic Patent References:
| WO1993008237A1 | 1993-04-29 |
Foreign References:
| EP0141388A2 | 1985-05-15 | |||
| US3497367A | 1970-02-24 | |||
| US3138475A | 1964-06-23 |
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