An improved method for forming a protective coating on a plastic substrate is disclosed, comprising the application of a curable coating composition which contains at least one alkyltrialkoxysilane in a water/organic solvent dispersion of the colloidal silica onto the substrate, and then curing the composition at elevated temperatures with an effective amount of a tetrabutylammonium carboxylate catalyst such as tetra-n-butylammonium acetate. This invention also includes improved curable silicone coating compositions containing such a catalyst.
本发明公开了一种在塑料基材上形成保护涂层的改进方法,包括在基材上涂敷一种可固化涂层组合物,该组合物在胶体
二氧化硅的
水/有机溶剂分散液中含有至少一种烷基三烷氧基
硅烷,然后用有效量的
羧酸四丁基
铵催化剂(如
醋酸四正丁基
铵)在高温下固化该组合物。本发明还包括含有这种催化剂的改进型可固化
硅涂层组合物。