| 摘要 |
PURPOSE:To provide the titled paste having excellent transparency, heat resistance, optical characteristics and color tone and suitable for use in the production of optical articles such as color filter, by blending a specified polyamic acid with a dye and/or a pigment. CONSTITUTION:A diamine component (a) composed of at least one member selected from the group consisting of 3,3'-diaminodiphenylmethane, 1,3-bis-(3- aminophenoxy)benzene and bis[4-(3-aminophenoxy)phenyl]sulfone is polymerized with an acid anhydride component (b) composed of 3,3',4,4'- biphenyltetracarboxylic acid dianhydride in a solvent (c) composed of N,N- dimethylformamide and/or N,N-dimethylacetamide to obtain a polyamic acid (A). 100pts.wt. component A is blended with 0.1-10pts.wt. a dye and/or a pigment (B) (e.g., C.I.Direct Red 81).
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