NAPHTHOPYRANS HAVING A PERFLUOROALKYL SUBSTITUENT IN POSITION 5, PREPARATION AND COMPOSITIONS AND MATRICES CONTAINING THEM

摘要

The invention relates to novel compounds of the naphthopyran type which have a perfluoroalkyl group (X) in position 5. These compounds are of formula (I) given below. These compounds (I) possess interesting photochromic properties. The invention also relates to their preparation, their applications as photochromes as well as the compositions and matrices containing them.