Pearlescent film coating systems and substrates coated therewith
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United States of America Patent
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Jun 7, 2005
Grant Date -
Sep 23, 2004
app pub date -
Feb 13, 2004
filing date -
Feb 20, 2003
priority date (Note) -
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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.
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