申请人:Phibro-Tech, Inc.
公开号:EP1649749A1
公开(公告)日:2006-04-26
A method of milling chlorothalonil to form a sub-micron product having a narrow particle size distribution is presented. The milling involves wet milling of the chlorothalonil with high density milling media having a diameter between 0.1 mm and 0.8 mm, preferably between 0.2 mm and 0.7 mm, and a density equal to or greater than 3.8 g/cc, preferably greater than 5.5 g/cc, in a ball mill using between about 40% and 80% loading of the mill volume with milling media, and having the chlorothalonil suspended in an aqueous milling liquid which comprises one or more surface active agents. The milling speed is preferably high, for example from about 1000 rpm to about 4000 rpm. The milled product can be used in foliar applications at a lower effective dosage than prior art formulations, can be used in improved antifouling paint formulations, and can be used in new applications such as the direct injection of solid chlorothalonil particulates in wood to act as a long lasting wood preservative.
本文介绍了一种研磨百菌清以形成粒度分布窄的亚微米产品的方法。这种研磨方法是在球磨机中用高密度研磨介质对百菌清进行湿法研磨,研磨介质的直径在 0.1 毫米至 0.8 毫米之间,最好在 0.2 毫米至 0.7 毫米之间,密度等于或大于 3.8 克/立方厘米,最好大于 5.5 克/立方厘米,研磨介质的用量占研磨机容积的 40%至 80%,百菌清悬浮在含水研磨液中,研磨液中含有一种或多种表面活性剂。研磨速度最好较高,例如从大约 1000 转/分钟到大约 4000 转/分钟。研磨后的产品可用于叶面喷洒,有效剂量低于现有技术配方,可用于改良的防污漆配方,也可用于新的应用领域,如将固态百菌清颗粒直接注入木材中,作为长效木材防腐剂。