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    • 8. 发明申请
    • Coating solution containing cocrystals and or crystals of a charge-generation pigment or a mixture of charge-generation pigments
    • 含有电荷产生颜料或电荷产生颜料的混合物的共晶体和/或晶体的涂层溶液
    • US20060204885A1
    • 2006-09-14
    • US10836784
    • 2004-04-30
    • Michel MolaireLloyd Lobo
    • Michel MolaireLloyd Lobo
    • G03G5/06
    • G03G5/0664C09B67/0002C09B67/0026C09B67/0035G03G5/0696G03G5/0698
    • A method for preparing a coating solution containing a cocrystallized titanyl phthalocyanine-titanyl fluorophthalocyanine, the method comprising: dry milling a charge-generation pigment or mixtures of charge-generation pigments; increasing the amorphousness of the pigment mixture as determined by X-ray crystallography using X-radiation characteristic of Cu Kα at a wavelength of 1.541 Å of the Bragg angle 2θ to provide an amorphous pigment mixture; contacting the amorphous pigment mixture with a first organic solvent having a gammac hydrogen bonding parameter of less than 9, with or without the presence of a dispersant material, to produce a crystalline pigment of the charge-generation pigment prior to contacting the pigment with a second organic solvent having a gammac hydrogen bonding parameter greater than 9; mixing at least one of a second organic solvent, a dispersant and a binder with the crystalline pigment/first solvent mixture without isolating the crystalline pigment to produce a mixture; and, adjusting the concentrations of the first organic solvent, crystalline pigment, binder, dispersants and second organic solvent as required to produce the coating solution of a selected composition.
    • 一种制备含有共结晶的氧钛酞菁 - 钛氧基酞菁的涂布溶液的方法,该方法包括:将电荷产生颜料或电荷产生颜料的混合物干磨; 通过使用X射线特性的Cu Kalpha在布拉格角2θ的1.541处通过X射线晶体学测定来提高颜料混合物的无定形性,以提供无定形颜料混合物; 使无定形颜料混合物与具有小于9的氢键合参数的第一有机溶剂接触,在或不存在分散剂材料的情况下,产生电荷产生颜料的结晶颜料 在使颜料与具有大于9的氢键合参数的第二有机溶剂接触之前; 将第二有机溶剂,分散剂和粘合剂中的至少一种与结晶颜料/第一溶剂混合物混合,而不分离结晶颜料以产生混合物; 并且根据需要调节第一有机溶剂,结晶颜料,粘合剂,分散剂和第二有机溶剂的浓度以产生所选组合物的涂布溶液。
    • 9. 发明申请
    • Process for producing electrophotographic composition layer having controlled thickness by dip coating on thin substrate
    • US20050158453A1
    • 2005-07-21
    • US11021806
    • 2004-12-21
    • Michel Molaire
    • Michel Molaire
    • B05D1/18G03G5/043G03G5/047G03G5/05
    • G03G5/0525B05D1/18G03G5/043G03G5/047G03G5/051G03G5/0514
    • A method for controlling the thickness and uniformity of a dip coated layer, using a coating apparatus under conditions of controlled temperature and controlled low humidity, includes the following steps: under normal coating conditions of ambient temperature and relative humidity, forming on a metal substrate having a thickness of at least about 500 microns a series of coated layers using variations in coating solution viscosity m, coating substrate withdrawal speed v, capillary number Ca, coating solution surface tension S, and boiling point bp (a correlative of evaporation rate)of the coating solution solvent, a coated layer including at least a portion of uniform thickness T(even) and, optionally, a portion of non-uniform thickness L(uneven); statistically analyzing measurements carried out on the series of coated layers and generating the constants, a, b, c, d, and e for Equations 2, 3, and 4: T(even)=a+b(m*v)   (Equation 2) L(uneven)=c+d*(v*bp)+e*(Ca*bp)   (Equation 3) v(even)=−cfbp*(d+e*m/S)   (Equation 4) using Equation 4, determining the coating speed v(even) producing the maximum thickness of a coated layer having a completely uniform thickness for a given set of coating solution characteristics, the coated layer being formed on a thin substrate under coating conditions of controlled temperature and controlled low humidity; and using Equation 2, determining the thickness T(even) of the portion of the coated layer having uniform thickness for a given set of coating solution characteristics and the coating speed determined in step (c), the coated layer being formed on a thin substrate under coating conditions of controlled temperature and controlled low humidity.