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    • 6. 发明授权
    • Method for improving the dispersion of redispersible polymer powders
    • 改善可再分散聚合物粉末分散性的方法
    • US06169130A
    • 2001-01-02
    • US09316815
    • 1999-05-21
    • Roland BodmeierJames W. McGinity
    • Roland BodmeierJames W. McGinity
    • C08K716
    • A61K9/5161A61K9/2866A61K9/2893C08J3/05C08J2301/08
    • The method according to the present invention includes the step of adding sufficient amounts of an alkalinizing agent to an aqueous solution into which a redispersible polymer powder will be dispersed or to an aqueous dispersion which will be dried to form a redispersible polymer powder. The method of the invention is particularly well suited for nonionic polymers. A surfactant, plasticizer and/or preservative can also be used in addition to the alkalinizing agent. Redispersible polymer powders processed according to the invention form acceptable tablet coatings which are comparable in quality to those coatings formed from aqueous polymer dispersions that have not been dried into redispersible polymer powders.
    • 根据本发明的方法包括向待分散的可再分散聚合物粉末的水溶液中加入足量的碱化剂或将其干燥以形成可再分散聚合物粉末的水分散体的步骤。 本发明的方法特别适用于非离子聚合物。 除了碱化剂之外,还可以使用表面活性剂,增塑剂和/或防腐剂。 根据本发明加工的可再分散聚合物粉末形成可接受的片剂涂层,其质量与由尚未干燥成可再分散聚合物粉末的水性聚合物分散体形成的涂层相当。