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公开(公告)号:US6152981A
公开(公告)日:2000-11-28
申请号:US255285
申请日:1999-02-22
CPC分类号: C05G3/0023 , C05G3/0029 , C08G18/3206 , C08G18/7664 , C08K3/06 , C08G2230/00
摘要: This invention relates to an isocyanate composition comprising a) at least one isocyanate and b) from 1 to 50% by weight, based on the total weight of component a), of sulfur. These isocyanate compositions are suitable for the preparation of polyurethane/polyurea encapsulated fertilizers. Accordingly, the present invention also relates to an improved process for the production of a polyurea/polyurethane encapsulated fertilizer comprising applying at least one isocyanate-reactive component to the fertilizer particles and applying the isocyanate compositions of the present invention to the fertilizer particles, to form these polyurea/polyurethane encapsulated fertilizers.
摘要翻译: 本发明涉及异氰酸酯组合物,其包含a)至少一种异氰酸酯和b)基于组分a)的总重量为1至50重量%的硫。 这些异氰酸酯组合物适用于制备聚氨酯/聚脲包封肥料。 因此,本发明还涉及用于生产聚脲/聚氨酯包封的肥料的改进方法,包括将至少一种异氰酸酯反应性组分施用于肥料颗粒并将本发明的异氰酸酯组合物施用于肥料颗粒,以形成 这些聚脲/聚氨酯包封肥料。