Delayed release film coatings containing calcium silicate and substrates coated therewith
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United States of America Patent
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Jan 12, 2016
Grant Date -
Sep 4, 2014
app pub date -
Feb 25, 2014
filing date -
Mar 1, 2013
priority date (Note) -
In Force
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Abstract
The present invention includes pH dependent, dry film coating compositions containing calcium silicate for use on orally-ingestible substrates such as tablets and the like. The film coating compositions can be applied as an aqueous suspension either directly to a substrate or after the substrate has been coated with a subcoat. In preferred aspects, the polymer is either an enteric or reverse-enteric polymer. Methods of preparing the dry film coatings, methods of preparing corresponding aqueous suspensions, methods of applying the coatings to substrates and the coated substrates themselves are also disclosed.
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