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Polyethylene-oxide based films and drug delivery systems made therefrom

DC
  • US 7,897,080 B2
  • Filed: 11/09/2009
  • Issued: 03/01/2011
  • Est. Priority Date: 10/12/2001
  • Status: Expired due to Fees
First Claim
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1. A process for making a film having a substantially uniform distribution of components, comprising the steps of:

  • (a) forming a masterbatch pre-mix comprising a solvent and a polymer selected from the group consisting of water-soluble polymers, water-swellable polymers and combinations thereof;

    (b) adding an active to a pre-determined amount of said masterbatch pre-mix to form a flowable polymer matrix, said matrix having a substantially uniform distribution of said active;

    (c) casting said flowable polymer matrix;

    (d) evaporating at least a portion of said solvent from said flowable polymer matrix to form a visco-elastic film within about 10 minutes or fewer to maintain said substantially uniform distribution of said active by locking-in or substantially preventing migration of said active within said visco-elastic film; and

    (e) forming a resulting film from said visco-elastic film, wherein said resulting film has a water content of 10% or less and said substantially uniform distribution of active by said locking-in or substantially preventing migration of said active is maintained.

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