Polymerizable composition for making thio containing resins including a salt catalyst.
The composition comprises at least one episulfide compound and a catalyst comprising a salt of formula Mp+mY-n, wherein MP+ is an alkaline metal, alkaline earth metal, a transition metal or ammonium group cation, Y- is an anion such as the pKa of the corresponding YH acid is 0.5 ≤ pKa ≤ 14 with the proviso that when MP+ is an ammonium group, the composition further comprises an electro-donor compound, p is the valency of the cation and n = m x p.
Application for making ophthalmic lenses.
用于制造含
硫树脂的可聚合组合物,包括一种盐催化剂。
该组合物包括至少一种环
硫化物化合物和一种由式 Mp+mY-n 的盐组成的催化剂,其中 MP+ 是碱
金属、碱土
金属、过渡
金属或
铵基阳离子,Y- 是阴离子,如相应的 YH 酸的 pKa 为 0.5 ≤ pKa ≤ 14,但当 MP+ 是
铵基时,该组合物还包括一种电致质化合物,p 是阳离子的化合价,n = m x p。
适用于制造眼科镜片。