| 摘要 |
NEW MATERIAL:Compds. of formula I wherein X and Y are each nitro, hydroxyl or amino; R<1> is halogen; R<2> is an alkyl, an alkoxy or an ester group; R<3> is an alkyl, an alkoxy or halogen. USE:Blue dyes which dye thermoplastic resins, thermosetting resins, alumina film, silica film, etc. When the dyes are used, filters having excellent colorability can be obtd. and colored filters having excellent resistance to heat and light, sublimation and very excellent spectral properties can be obtd. The coloring can be made by kneading, transferring, dyeing, sublimation and deposition, etc. PREPARATION:Dinitrodihydroxyanthraquinone or tetrahydroxyanthraquinone and its leuco compd. are reacted with an aniline derivative. Par of the dye is then reduced with sodium sulfide to obtain the desired compd.
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