Pharmaceutical Coating Technology (Part 2)

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Pharmaceutical Coating Technology (Part 2)

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The chapter commences by reviewing the properties of the broad classes of materials used in film coating, polymers, plasticizers, pigments and solvents (or vehicles). An initial consideration of the polymers shows that while processing is most commonly performed using these materials in solution, there are systems which utilize polymers in suspension in water. The mechanism of coalescence and film formation for these types of materials are discussed. The individual polymers are dealt with in some detail and an attempt is made to divide them into functional and non-functional coating polymers. Functional polymers being defined as those which modify the...

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