Polyvinyl acetate film coatings with controlled release and...

A - Human Necessities – 61 – K

Patent

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A61K 9/50 (2006.01)

Patent

CA 2478407

The invention relates to the combination of polyvinyl acetate and water- insoluble, acid-insoluble, or alkali-insoluble polymers used for producing film coatings for forms of administration in which agents are released in a controlled manner, and methods for the production thereof. The controlled- release properties can be specifically adjusted by means of said combinations, resulting in films having excellent mechanical stability and storage stability. In particular, agents are released independent of the pH by means of the inventive forms of administration.

La présente invention concerne la combinaison de polyacétate de vinyle et de polymères insolubles dans l'eau, insolubles dans un milieu acide ou insolubles dans un milieu alcalin pour produire des films de revêtement destinés à des formes d'administration à libération contrôlée de substances actives, ainsi que des procédés pour produire cette combinaison. Ces combinaisons permettent de régler de manière spécifique les caractéristiques de libération contrôlée et d'obtenir des films présentant une très bonne stabilité mécanique et une très bonne stabilité au stockage. La libération de substances actives des formes d'administration selon cette invention est notamment indépendante du pH.

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