| 摘要 |
PURPOSE:To improve the spectral sensitivity in the wide range of the visible region to the near infrared region and to also improve the wear resistance and mechanical strength by using specified squarelium pigments as a photoconductive material contained in the photosensitive layer. CONSTITUTION:A squarelium pigment represented by formula I (where R is hydroxyethyl, 2-6C chain alkyl, aryl or benzyl) and a squarelium pigment represented by formula II are incorporated into a photosensitive layer as a photoconductive material to obtain the desired electrophotographic sensitive body. The pigment represented by the formula I is produced by reacting 3,4-dihydroxy-3-cyclobutene-1,2-dione represented by formula III with an aniline deriv. represented by formula IV. The pigment represented by the formula II is produced by reacting 3,4-dihydroxy-3-cyclobutene-1,2-dione represented by the formula III with 4-phenylmorpholine represented by formula V. |
