Heavy metal salts of 1-hydroxy-2-pyridinethione in the form of crystals having defined shape and size, are useful in shampoos, creme rinses and other hair care compositions to deliver antidandruff benefits while not detracting as much as previous pyridinethione salts from the compositions' aesthetics. Hair care compositions containing such salts are also included.
A process for producing heavy metal 1-hydroxy-2-pyridinethione salts comprises reacting a water soluble salt of the desired metal with 1-hydroxy-2-pyridinethione or with a water-soluble salt of the pyridinethione in an aqueous surfactant medium.
1-hydroxy-2-pyridinethione 的重
金属盐呈晶体状,具有确定的形状和大小,可用于洗发
水、膏状洗发
水和其他护发组合物,具有去屑功效,同时不像以前的
吡啶硫酮盐那样影响组合物的美观。此外,还包括含有此类盐类的护发组合物。
生产重
金属 1-羟基-2-
吡啶硫酮盐的工艺包括:在
水性表面活性剂介质中,将所需
金属的
水溶性盐与 1-羟基-2-
吡啶硫酮或
吡啶硫酮的
水溶性盐反应。