It is an object of the present invention to provide an infrared absorption filter which enables a coloring matter having infrared absorptivity to be contained or dispersed uniformly in a high concentration and has excellent durability and an infrared absorption panel comprising this infrared absorption filter.
The infrared absorption filter is composed of a polycarbonate resin which contains 20 to 100 mol% of a recurring unit having a fluorene skeleton represented by the formula (1) and 0 to 80 mol% of a recurring unit represented by the formula (2) and a coloring matter having infrared absorptivity.
本发明的目的是提供一种红外线吸收滤光片,它能使具有红外线吸收能力的着色物质以高浓度均匀地含有或分散,并具有良好的耐久性,以及一种由这种红外线吸收滤光片组成的红外线吸收板。
该红外线吸收滤光片由聚
碳酸酯
树脂和具有红外线吸收性的
着色剂组成,其中聚
碳酸酯
树脂含有 20 至 100 摩尔%的具有式(1)表示的
芴骨架的循环单元和 0 至 80 摩尔%的式(2)表示的循环单元。