A process for the preparation of a stable dispersion of solid particles, in an aqueous medium comprising combining (a) a first solution comprising a substantially water-insoluble substance which is a pyrazine compound of Formula I, a water-miscible organic solvent and an inhibitor with (b) an aqueous phase comprising water and optionally a stabiliser, thereby precipitating solid particles comprising the inhibitor and the substantially water-insoluble substance; and optionally removing the water-miscible organic solvent; wherein the inhibitor is a non-polymeric hydrophobic organic compound as defined in the description.
Also claimed are stable dispersions prepared by the process, solid particles prepared by the process and use of such particles.
一种制备稳定固体颗粒分散液的方法,其中包括将(a)第一溶液与(b)
水相结合,从而沉淀出包含
抑制剂和基本上不溶于
水的Formula I
吡嗪化合物的固体颗粒,所述第一溶液包括基本上不溶于
水的物质、
水相溶的有机溶剂和
抑制剂,可选地还包括稳定剂;并可选地去除
水相溶的有机溶剂;其中所述
抑制剂是描述中定义的非聚合疏
水有机化合物。此外,还声明了通过该方法制备的稳定分散液、通过该方法制备的固体颗粒以及使用这些颗粒的用途。