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    • 1. 发明授权
    • Encapsulation method
    • 封装方法
    • US06861064B1
    • 2005-03-01
    • US09529442
    • 1998-09-24
    • Timo LaaksoMats Reslow
    • Timo LaaksoMats Reslow
    • A61K9/51A61K9/14A61K9/16A61K9/50A61K31/7064A61K31/7088A61K31/711A61K38/00A61K38/04A61K38/21A61K38/22A61K38/27A61K38/28A61K38/43A61K39/00A61K47/34B01J13/00B01J13/02B01J13/18A01N25/28
    • B01J13/18A61K9/1647A61K9/1694A61K9/5031
    • A novel method of encapsulating an active substance in a biodegradable polymer, which comprises: a) dissolving said biodegradable polymer in an organic solvent therefor; b1) dispersing said active substance in the organic solution obtained in step a) to provide a dispersion with the active substance as the inner phase thereof; or alternatively b2) emulsifying said active substance, dissolved in water or other aqueous solvent therefor, in the organic solution obtained in step a) to provide an emulsion with the active substance as the inner aqueous phase thereof; and c) subjecting the dispersion obtained in step b1), or alternatively the emulsion obtained in step b2), to an encapsulation operation with an aqueous polyethylene glycol solution as a continuous phase to provide micro- or nanoparticles having the active substance encapsulated therein. Sustained release particles obtainable thereby.
    • 一种将活性物质包封在生物可降解聚合物中的新方法,其包括:a)将所述生物可降解聚合物溶解在有机溶剂中; b1)将所述活性物质分散在步骤a)中获得的有机溶液中以提供活性物质作为其内相的分散体; 或者b2)将在步骤a)中获得的有机溶液中乳化所述活性物质溶于水或其它水溶剂中,以提供具有活性物质作为其内部水相的乳液; 和c)使步骤b1)中获得的分散体,或者将步骤b2)中获得的乳液进行包封操作,以聚乙二醇水溶液作为连续相,以提供其中包封活性物质的微粒或纳米颗粒。 可获得的持续释放颗粒。