Espacenet
- EP1443084
(A1)
- Bibliographic data
- Description
- Claims
- Mosaics
- Original document
- Cited documents
- Citing documents
- INPADOC legal status
- INPADOC patent family
Bibliographic data: EP1443084 (A1) ― 2004-08-04
Pearlescent pigments based on fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides
| Page bookmark | EP1443084 (A1) - Pearlescent pigments based on fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides | ||||
|---|---|---|---|---|---|
| Inventor(s): | BERTAUX STEPHANE DR [FR]; REYNDERS PETER DR [DE]; WICHMANN JENS-UWE DR [DE] + | ||||
| Applicant(s): | MERCK PATENT GMBH [DE] + | ||||
| Classification: |
|
||||
| Application number: | EP20040000817 20040116 | ||||
| Priority number(s): | EP20040000817 20040116; EP20030002303 20030203 | ||||
Abstract of
EP1443084
(A1)
|
The present invention relates to novel pigments based on substrates coated with at least one selectively light absorbing layer of fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides. Metal oxides or mixed metal oxides are coated onto a substrate; the resulting precursor is transferred into a furnace and calcined under a fluoridizing and/or sulfurizing gas flow to convert the oxides into fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides depending on the reaction parameters. The conversion to fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides is preferably carried out in a fluidized bed reactor. Angle-dependent optical pigments are thus produced which are especially useful in paints, powder coatings, paper coatings, plastics, cosmetics, inks and security-enhancing features as well as in decorative applications for foods and drugs.