ALKYLENEBISBENZO-M-DIOXANE COMPOUND AND PREVENTION OF FADING OF ORGANIC COLORED SUBSTANCE WITH LIGHT USING THE SAME COMPOUND

摘要

NEW MATERIAL:The alkylenebisbenzo-m-dioxane compound of formula (R is halogen, alkyl, aryl, acylamino, sulfonamido, alkylthio, arylthio, alkenyl, cycloalkyl, cycloalkenyl, acyl, heterocyclic group, cyano, hydroxyl, alkoxy, cycloalkoxy, aryloxy, heterocyclic-oxy, siloxy, spiro compound residue or organic hydrocarbon compound residue; m and n are 0-7; when m+n is =2, the R groups may be same or different; A is simple bond or a group having 1-6C alkyl as the straight-chain part). USE:Useful as a photo-fading preventive for organic colored substance. It especially improves the light stability of pigment and dye without deteriorating the color purity. There is no staining of the non-colored part when used as a color photographic material. PREPARATION:The compound of formula is produced by forming a benzo-m- dioxane ring using a bisphenol derivative.