| abstract |
PURPOSE: An ultraviolet ray absorber that contains a spiro compound of a specific structure, thus having excellent action of ultraviolet ray absorption, showing high resistance to sublimation and heat and causing no discoloration, even when a large amount of the agent is applied. n CONSTITUTION: The objective ultraviolet ray absorber contains, as an active ingredient, a spiro compound of formula I [Y is formula II; A is formula III, formula IV (R 1 is H, halogen, 1W4C alkyl or alkoxy, carboxy, sulfonic acid); R 2 is H, 1W12C alkyl; R 3 , R 4 are 1W12C alkyl; X is methylene, oxygen, amine, sulfide, sulfoxide, sufone; n is 0W12]. The compound is obtained by reaction between 3,9-bis(1,1-dialkyl-2-hydroxyethyl)-2,4,8,10-tetraoxyaspiro-[5,5] undecene and an acid, ester derivative or halide of benzophenone or benzotriazole. n COPYRIGHT: (C)1986,JPO&Japio |