| 摘要 |
PURPOSE: To obtain the subject composition having high heat resistance and excellent transparent colorlessness and useful for an optical filter to effectively cut visible light and near infrared light by compounding a polyimide resin containing perfluoroalkyl groups with a specific coloring matter. CONSTITUTION: This composition is composed of (A) a polyimide resin preferably consisting of a recurring unit of formula I (A is a tetracarboxylic acid residue; B is a diamine residue; X and Y are each a perfluoroalkyl; (l) is an integer of 0-6; (m) is an integer of 0-4: l+m=1-10), e.g. a polyimide resin of formula II and (B) at least one of a coloring matter having an absorption band in a visible region and/or a near infrared region (preferably, a coloring matter selected from anthraquinone pigments, azo pigments, qulnophthalone pigments and phthalocyanine pigments) soluble in the component A. Further, the component B is preferably 1-50wt.% based on the component A. The perfluoroalkyl is preferably trifluoromethyl. |
