申请人:The Plessey Company plc
公开号:US04826977A1
公开(公告)日:1989-05-02
A series of novel photochromic spiropyrans are disclosed in which a spiro-adamantane group is introduced into the 2-position of the benzopyran or naphthopyran ring. The spiropyran compounds of the invention exhibit heliochromic properties, i.e. they color in sunlight and fade rapidly at ambient temperatures in the absence of U.V. light, making them good candidates for use in the manufacture of sunglasses. The invention includes lenses which darken in sunlight and incorporate the novel spiropyrans and a process for the preparation of the spiropyran compounds.
本发明揭示了一系列新型光致变色的螺环吡喃化合物,其中在苯并吡喃或萘并吡喃环的2位引入了螺戊烷基团。本发明的螺环吡喃化合物表现出日光变色性能,即它们在阳光下变色,并在没有紫外光的情况下在常温下迅速褪色,使其成为太阳镜制造中的良好候选材料。该发明包括在阳光下变暗并结合新型螺环吡喃化合物的镜片,以及一种制备螺环吡喃化合物的方法。