The catalyst inhibitors of the present invention react with conventional platinum group metal-containing hydrosilation catalysts to form complexes that delay curing of compositions containing these complexes in the absence of oxygen and SiH-reactive hydroxylated compounds. The curable compositions comprise (1) curable compounds containing alkenyl radicals and/or silicon-bonded hydroxyl groups, (2) curing agents containing silicon-bonded hydrogen atoms, and (3) a platinum group metal-containing hydrosilation catalyst. Preferred inhibitors provide long term storage stability.
本发明的催化剂
抑制剂与传统的含
铂族
金属的加氢催化剂反应形成络合物,在没有
氧气和SiH反应性羟基化合物的情况下,可延迟含有这些络合物的组合物的固化。可固化组合物包括:(1)含有烯基和/或
硅键羟基的可固化化合物;(2)含有
硅键氢原子的固化剂;(3)含
铂族
金属的氢化催化剂。首选的
抑制剂具有长期储存稳定性。