Described herein are dimethyl acetal-containing UV-absorbing compounds and their uses in preparing UV-absorbing polyvinyl alcohol prepolymers suitable for producing UV- absorbing contact lenses capable of blocking ultra-violet ("UV") radiation and optionally (but preferably) violet radiation with wavelengths from 380 nm to 440 nm, thereby protecting eyes to some extent from damages caused by UV radiation and potentially from violet radiation. This invention also provides a UV-absorbing polyvinyl alcohol prepolymer.
本文描述了含有二甲基
缩醛的吸收紫外线化合物及其在制备适用于生产能够阻挡紫外线("UV")辐射和可选地(但最好)波长为380纳米至440纳米的紫外线吸收聚
乙烯醇预聚合物的紫外线吸收接触镜中的用途,从而在一定程度上保护眼睛免受紫外线辐射和潜在的紫外辐射造成的损害。本发明还提供了一种吸收紫外线的聚
乙烯醇预聚合物。