Invention Grant
- Patent Title: Multi-layer effect pigment
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Application No.: US11550952Application Date: 2006-10-19
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Publication No.: US07993444B2Publication Date: 2011-08-09
- Inventor: Daniel S. Fuller , Curtis J. Zimmermann
- Applicant: Daniel S. Fuller , Curtis J. Zimmermann
- Applicant Address: US NJ Florham Park
- Assignee: BASF Catalysts LLC
- Current Assignee: BASF Catalysts LLC
- Current Assignee Address: US NJ Florham Park
- Agency: Frenkel & Assocaites, PC
- Main IPC: C09C1/36
- IPC: C09C1/36 ; C09C1/00 ; C04B14/20

Abstract:
A multilayer effect pigment includes a transparent substrate, a layer of high refractive index material on the substrate, and alternating layers of low refractive index and high refractive index materials on the first layer, the total number of layers being an odd number of at least three, all adjacent layers differing in refractive index by at least about 0.2 and at least one of the layers having an optical thickness which is different from all of the other layers. The resulting multilayer effect pigment is not a quarter-wave stack. The present effect pigments may be used in cosmetic and industrial applications.
Public/Granted literature
- US20070056470A1 Multi-Layer Effect Pigment Public/Granted day:2007-03-15
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