申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0373643A2
公开(公告)日:1990-06-20
Near infrared absorbers which have a molecular extinction coefficient of 200,000 or more and are represented by the formula (I)
wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is hydrogen, an alkyl group, alkoxyl group or alkylthio group; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is hydrogen, halogen, a nitro group, alkyl group, aralkyl group, alkenyl group, alkynyl group, alkoxyl group, aryloxy group, alkylthio group or arylthio group; and Met represents two hydrogen atoms or a metal, are useful for the production of optical display and recording materials.
分子消光系数大于或等于 200,000 且由式 (I) 表示的近红外吸收剂
其中 Y¹、Y²、Y³、Y⁴、Y⁵、Y⁶、Y⁷ 和 Y⁸ 各为氢、烷基、烷氧基或烷硫基;A¹、A²、A³、A⁴、A⁵、A⁶、A⁷ 和 A⁸ 中的每一个都是氢、卤素、硝基、烷基、芳烷基、烯基、炔基、烷氧基、芳氧基、烷硫基或芳硫基;以及 Met 代表两个氢原子或一种金属。