Preparation and use of photopolymerized microparticles
    9.
    发明申请
    Preparation and use of photopolymerized microparticles 审中-公开
    光聚合微粒的制备和应用

    公开(公告)号:US20050192371A1

    公开(公告)日:2005-09-01

    申请号:US11070506

    申请日:2005-03-02

    摘要: Methods of forming crosslinked polymer particles in situ from polymer precursors such as monomers or oligomers, comprising exposing a composition comprising at least one polymer precursor, a solvent or solvent mixture, and an antisolvent or antisolvent mixture to photoradiation under conditions whereby particles are formed are provided. The polymer precursor may be photosensitive, or a separate polymerization initiator may be used. In a preferred embodiment, the polymer precursor is insoluble in the antisolvent or antisolvent mixture and the solvent or solvent mixture is soluble in the antisolvent or antisolvent mixture at the concentrations used. Crosslinked polymer particles and crosslinked polymer particles comprising a polymer and a bioactive material are also provided. The polymer may be erodable, and the polymer particles formed may be used in a variety of applications, including controlled release of bioactive materials such as drugs. Polymer particles formed using the methods of the invention have low residual solvent levels and high additive encapsulation efficiencies. The processes of the invention allow control of particle size and morphology, use low operating temperatures and are useful for efficient bulk production.

    摘要翻译: 提供从聚合物前体如单体或低聚物原位形成交联聚合物颗粒的方法,包括将包含至少一种聚合物前体,溶剂或溶剂混合物的组合物以及抗溶剂或抗溶剂混合物暴露于形成颗粒的条件下进行光引发 。 聚合物前体可以是光敏的,或者可以使用单独的聚合引发剂。 在优选的实施方案中,聚合物前体不溶于抗溶剂或抗溶剂混合物,溶剂或溶剂混合物可以以所使用的浓度溶于抗溶剂或抗溶剂混合物。 还提供了交联聚合物颗粒和包含聚合物和生物活性材料的交联聚合物颗粒。 聚合物可能是可侵蚀的,并且形成的聚合物颗粒可以用于各种应用中,包括诸如药物的生物活性材料的控制释放。 使用本发明方法形成的聚合物颗粒具有低的残留溶剂水平和高的添加剂包封效率。 本发明的方法允许控制颗粒尺寸和形态,使用低的操作温度,并且可用于高效批量生产。

    Preparation and use of photopolymerized microparticles
    10.
    发明授权
    Preparation and use of photopolymerized microparticles 失效
    光聚合微粒的制备和应用

    公开(公告)号:US06403672B1

    公开(公告)日:2002-06-11

    申请号:US09451481

    申请日:1999-11-30

    IPC分类号: C08F246

    摘要: Methods of forming polymer particles in situ from polymer precursors such as monomers or oligomers, comprising exposing a composition comprising at least one polymer precursor, a solvent or solvent mixture, and an antisolvent or antisolvent mixture to photoradiation under conditions whereby particles are formed are provided. The polymer precursor may be photosensitive, or a separate polymerization initiator may be used. In a preferred embodiment, the polymer precursor is insoluble in the antisolvent or antisolvent mixture and the solvent or solvent mixture is soluble in the antisolvent or antisolvent mixture at the concentrations used. Polymer particles comprising a polymer and a bioactive material are also provided. The polymer may be erodable, and the polymer particles formed may be used in a variety of applications, including controlled release of bioactive materials such as drugs. Polymer particles formed using the methods of the invention have low residual solvent levels and high additive encapsulation efficiencies. The processes of the invention allow control of particle size and morphology, use low operating temperatures and are useful for efficient bulk production.

    摘要翻译: 提供从聚合物前体例如单体或低聚物原位形成聚合物颗粒的方法,其包括将包含至少一种聚合物前体,溶剂或溶剂混合物的组合物以及抗溶剂或抗溶剂混合物暴露于形成颗粒的条件下进行光引发。 聚合物前体可以是光敏的,或者可以使用单独的聚合引发剂。 在优选的实施方案中,聚合物前体不溶于抗溶剂或抗溶剂混合物,溶剂或溶剂混合物可以以所使用的浓度溶于抗溶剂或抗溶剂混合物。 还提供了包含聚合物和生物活性材料的聚合物颗粒。 聚合物可能是可侵蚀的,并且形成的聚合物颗粒可以用于各种应用中,包括诸如药物的生物活性材料的控制释放。 使用本发明方法形成的聚合物颗粒具有低的残留溶剂水平和高的添加剂包封效率。 本发明的方法允许控制颗粒尺寸和形态,使用低的操作温度,并且可用于高效批量生产。