Pearlescent film coating systems and substrates coated therewith
US6902609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2004 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Feb 13, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2886
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention is directed to film coating systems for use on oral dosage forms such as compressed tablets and orally-ingestible substrates which have improved pearlescent qualities. The film coating systems can be applied either directly to a substrate or after the substrate has been coated with a subcoat. In preferred aspects, the pearlescent film coating is prepared as a dry powder mixture containing a cellulosic polymer, a detackifier, a gloss enhancer, and a pearlescent pigment. Film coating compositions containing an aqueous suspension of the powder mixtures, methods of applying the coatings to substrates and the coated substrates are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.