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4. 发明公开

EP3137436A1 METHOD OF FORMING AN ENCAPSULATED FERTILIZER 审中-公开
标题翻译： VERFAHREN ZUR HERSTELLUNG EINES EINGEKAPSELTENDÜNGERS
公开(公告)号：EP3137436A1
公开(公告)日：2017-03-08
申请号：EP15723356.0
申请日：2015-04-27
申请人： BASF SE
发明人： PRAW, Michael
IPC分类号： C05G3/00 , C05C9/00 , C05C1/02 , C05C11/00
CPC分类号： C05G3/0029 , C05C1/02 , C05C9/005 , C05C11/00 , C05G3/0082 , C05G3/0094
摘要： A method of forming an encapsulated fertilizer comprises the step of providing a core particle. The core particle comprises a fertilizer and has an outer surface. An example of the fertilizer is urea. The method further comprises the step of applying an isocyanate component directly to the outer surface of the core particle. The isocyanate component has isocyanate functional groups. An example of the isocyanate component is an isocyanate-terminated prepolymer. A specific example of the isocyanate-terminated prepolymer is one comprising the reaction product of a diphenylmethane diisocyanate (MDI) and a polyol. The method further comprises the step of reacting the isocyanate component with ambient moisture to form a layer disposed about the core particle to form the encapsulated fertilizer. The layer comprises polyurea linkages. The layer may further comprise polyurethane linkages. For example, the layer may be in the form of a polyurea/polyurethane layer when the isocyanate-terminated prepolymer is utilized.
摘要翻译：形成包封肥料的方法包括提供核心颗粒的步骤。核心颗粒包括肥料并具有外表面。肥料的一个例子是尿素。该方法还包括将异氰酸酯组分直接施加到核心颗粒的外表面的步骤。异氰酸酯组分具有异氰酸酯官能团。异氰酸酯组分的实例是异氰酸酯封端的预聚物。异氰酸酯封端的预聚物的具体实例是包括二苯基甲烷二异氰酸酯（MDI）和多元醇的反应产物。该方法还包括使异氰酸酯组分与环境水分反应以形成围绕核心颗粒设置的层以形成包封的肥料的步骤。该层包含聚脲键。该层还可以包含聚氨酯键。例如，当使用异氰酸酯封端的预聚物时，该层可以是聚脲/聚氨酯层的形式。

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