A process for the preparation of a solvent-free suspension of a low-melting point water-insoluble solid agrochemical active ingredient, which comprises suspending 1-40% by weight of a silica-based carrier in 40 to 97% by weight of water in the presence of 1-40% by weight of anionic dispersant, heating the suspension thus obtained to a temperature above that of the active ingredient, and adding, with stirring, 1-25% by weight of a molten active ingredient with a melting point of <80° C. or a mixture of at least two active ingredients each having a melting point of <80° C. The present invention furthermore relates to the preparation of suspension concentrates, water-dispersible powders and water-dispersible granules based on the suspensions prepared via the abovementioned process.
一种低熔点
水不溶性固体农用
化学品活性成分的无溶剂悬浮液的制备方法,包括在 1-40% 重量的阴离子分散剂的存在下,将 1-40% 重量的
二氧化硅基载体悬浮于 40 至 97% 重量的
水中,将由此获得的悬浮液加热至高于活性成分的温度,然后在搅拌下加入 1-25% 重量的熔点小于 80°C 的熔融活性成分,或至少两种活性成分的混合物,每种活性成分的熔点均小于 80°C。本发明还涉及以通过上述工艺制备的悬浮液为基础制备悬浮浓缩液、
水分散粉剂和
水分散粒剂。