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发明公开
CN110357708A 一种缓释尿素的制备方法 无效 - 驳回

一种缓释尿素的制备方法
摘要：
本发明涉及一种缓释尿素的制备方法，其包括如下步骤：（1）尿素颗粒的预热；（2）内层憎水层的涂布；（3）外层聚氨酯层的涂布。本发明的方法易于操作、易于控制，且经该方法制备的缓释尿素的缓释周期更长、且包覆材料可降解。
摘要（英）：

The invention relates to a preparation method of slow release urea. The preparation method comprises the following steps: (1) preheating of urea particles; (2) coating of an inner hydrophobic layer; and (3) coating of an outer polyurethane layer. The method of the invention has the advantages of easiness in operation, and easiness in control, and the slow release urea prepared by the method has the advantages of long slow release period, and degradability of coating materials.

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