Naphthopyrans and phenanthropyrans annelated in c5-c6 with a bicyclic group, andcompositions and (co)polymer matrices containing them

摘要

The invention relates to novel naphthopyran- and phenanthropyran-type compounds having a carbobicycle annelated in 5,6-position. These compounds have formula (I) given below:These compounds (I) have interesting photochromic properties. The invention also relates to their preparation, to their applications as photochromes, as well as to the compositions and (co)polymer matrices containing them.