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    • 46. 发明授权
    • Encapsulated particle
    • 封装颗粒
    • US08303680B2
    • 2012-11-06
    • US12490771
    • 2009-06-24
    • Donald C. Mente
    • Donald C. Mente
    • C05D9/02A01N25/00B32B5/16B32B9/00B32B15/02B32B17/02B32B19/00B32B21/02B32B23/02B32B27/02
    • C08G18/7664C05G3/0029C08G18/36C08G18/632C09D175/04Y10T428/2998
    • An encapsulated particle comprises a core particle and a polyurethane layer disposed about the core particle. The core particle can be various particles, such as fertilizer, biocides, flame retardants, seeds, etc. The polyurethane layer comprises the reaction product of an isocyanate component and an isocyanate-reactive component. The isocyanate-reactive component comprises a graft polyol having a continuous phase and polymeric particles. A method of forming the encapsulated particle comprises the steps of providing the core particle, applying the isocyanate and isocyanate-reactive components to the core particle, and reacting the isocyanate and isocyanate-reactive components to form the polyurethane layer. The encapsulated particle has excellent physical properties, such as increased water repellency, resiliency and shelf life.
    • 包封的颗粒包括芯颗粒和围绕芯颗粒设置的聚氨酯层。 核心颗粒可以是各种颗粒,例如肥料,杀生物剂,阻燃剂,种子等。聚氨酯层包括异氰酸酯组分和异氰酸酯反应性组分的反应产物。 异氰酸酯反应性组分包括具有连续相和聚合物颗粒的接枝多元醇。 形成包封颗粒的方法包括以下步骤:提供核心颗粒,将异氰酸酯和异氰酸酯反应性组分施用于芯颗粒,并使异氰酸酯和异氰酸酯反应性组分反应形成聚氨酯层。 包封的颗粒具有优异的物理性能,例如增加的防水性,弹性和保质期。