Synthesis Of Bisphenol Z And Preparation Of Organic Photocoductor Conductive Coating

The paper aim at prepare a kind of conductive coating use on aluminium-base of organic photoconductor of laser printer. The technology will take place mirror process and anode oxidation use on this aspect in our country. It will reduce produce coast when it avoid a lot of waste acid and waste alkali. The prepare process include four part:(1) Composite conductive powder with Titanium dioxide powder covered by SnO₂ and Sb₂O₃ was prepared by the chemical coprecipitation technology. The results showed that when the ratio of TiO₂ to SnCl4 to SbCl3(by weight) is 25.0:15.0:1.0, pH value of hydrolysis solution is 1.5, hydrolysis temperature is 60.0℃and calcinations temperature is 7.0×102℃, the powder's volumetric electric resistivity is 0.077×103??cm and the diameter of conductive powder is below 200nm. At the same time, the paper disclose the effect of process factors on volume resistivity of conductive powder.(2) An improved process of synthesis of 1,1-bis-(4′-hydroxyphenyl)–cyclo hexane,1,1-bis-(3′-methyl-4′-hydroxyphenyl)–cyclohexane,1,1-bis- (4′- hydroxyl phenyl)–cyclophentane,1,1-bis-(3′-methyl-4′- hydroxyphenyl)–cyclo phentane through condensation reaction of phenol or o-methylphenol and cyclohexanone or cyclophentanone using chlorine hydride as catalyst and thioglycol as co-catalyst was developed. At the optimum synthesis conditions: the ratio of phenol to cyclic ketone to thioglycol (by mole) is 20:5:1, their HPLC purities were high than 98.1251%,and their yields are 97.28%,75.9%,67.09% and 74.15% respectively. IR,UV and MS were used to determine the structure and purity of the products.(3) An process of synthesis of phenolic resin through condensation reaction of 1,1-bis-(4′-hydroxyphenyl)–cyclohexane and paraformaldehyde using sodium hydroxide as catalyst. At the optimum synthesis conditions: the ratio of 1,1-bis- (4′-hydroxyphenyl)–cyclohexane to paraformaldehyde to sodium hydroxide is 5:20:1. The phenolic resin molecular weight is 4750 and solid content is 79%.(4) Conductive coating was then prepared on aluminum alloy substrate with phenolic resin as the binder. The results of the experiments show that the coating of most excellent fluiding and solvent resistance under the preparation conditions: m(glass bead):m(phenolic resin):m(composite conductive powder): m(titanium tetra-n-butoxide)=150:30:15:1,m(glass bead):m(anhydrous alcohol) =1:1,ball milling2h(300r/min).The performance of the conductive coating such as volume resistivity and the thickness of the coating has met the demand of application in OPC of laser printer.