| 摘要 |
PURPOSE:To form a surface protective layer which does not get cloudy and has satisfactory hardness only by drying after a conventional coating stage by adding a specified amount of an organotin compound to a coating liq. for forming a surface protective layer. CONSTITUTION:A surface protective layer contg. an electric resistance regulator, a thermosetting resin and 0.01-10wt% organotin compound basing on the amount of the thermosetting resin is formed on an org. photoconductive layer contg. an org. photoconductor such as a dispersible photoconductor or a separated function type photoconductor. Polyurethane resin, thermosetting acrylic resin, silicone resin or the like is used as the thermosetting resin. Stannous octoate, dibutyltin-2-ethyl hexoate, triethyltin acetate or the like is used as the organotin compound. The electric resistance regulator is a metal or a metallic oxide with <=10<9>OMEGA.cm resistivity, and the preferred regulator is a solid soln. of tin oxide or titanium oxide having <=0.3mum average particle size or a mixture of two kinds of such solid solns. The regulator is contained in the protective layer by 10- 50wt%. Drying is carried out at 100-140 deg.C for 3-5min after coating. |
