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    Method to make a photoconductor drum having an overcoat using a dual curing process
    1.
    发明授权
    Method to make a photoconductor drum having an overcoat using a dual curing process 有权

    公开(公告)号：US10571818B1

    公开(公告)日：2020-02-25

    申请号：US16225362

    申请日：2018-12-19

    申请人： LEXMARK INTERNATIONAL, INC.

    发明人： Weimei Luo ,  Mark Thomas Bellino ,  Rudolph Wayne Hrobsky

    IPC分类号： G03G7/00 ,  G03G5/05 ,  B05D3/06 ,  G03G5/147

    摘要： A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.

    Method to make a photoconductor drum having an overcoat using a dual curing process
    4.
    发明授权
    Method to make a photoconductor drum having an overcoat using a dual curing process 有权

    公开(公告)号：US10684566B1

    公开(公告)日：2020-06-16

    申请号：US16366268

    申请日：2019-03-27

    申请人： LEXMARK INTERNATIONAL, INC.

    发明人： Weimei Luo ,  Mark Thomas Bellino ,  Rudolph Wayne Hrobsky

    IPC分类号： G03G7/00 ,  G03G5/05 ,  G03G5/147 ,  B05D3/06 ,  B05D1/02 ,  B05D1/18

    摘要： A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.

    Overcoat formulation for long-life electrophotographic photoconductors and method for making the same
    7.
    发明授权
    Overcoat formulation for long-life electrophotographic photoconductors and method for making the same 有权
    长寿命电子照相感光体的外涂层配方及其制造方法

    公开(公告)号：US09448497B2

    公开(公告)日：2016-09-20

    申请号：US14145107

    申请日：2013-12-31

    申请人： Lexmark International, Inc.

    发明人： Mark Thomas Bellino ,  Gerald Hugh Ciecior ,  Douglas Jeffrey Harris ,  Weimei Luo ,  Brian David Munson ,  Dat Quoc Nguyen ,  Scott Daniel Reeves ,  Tanya Yvonne Thames

    IPC分类号： G03G5/05 ,  G03G5/147

    CPC分类号： G03G5/14734 ,  G03G5/0525 ,  G03G5/0546 ,  G03G5/147 ,  G03G5/14713 ,  G03G5/14717 ,  G03G5/14721 ,  G03G5/14791 ,  G03G5/14795

    摘要： An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level. The biphasic morphology of the overcoat layer using the method of the present invention gives rise to the good wear rates while allowing rapid transport of the electrical charge and thus fast discharge properties of the photoconductor drum.

    摘要翻译： 提供了使用诸如电子束（EB）或紫外（UV）光等照射的电子照相成像装置的外涂层感光鼓的外涂层和方法。 然后使用10至100千格（kGy），优选20至40kGys之间的EB剂量或0.1至2J / cm 2的曝光的UV照射来固化感光鼓。 本发明的独特外涂层形成为具有由高度固化的交联相和富含未固化材料的第二相组成的双相形态。 在双相结构的第二相中发现的未固化未交联材料的所需量为2-70重量％范围，当以5-50重量％的水平存在时，寿命长和电性能特别好的组合， 最佳性能在15-40重量级。 使用本发明的方法的外涂层的双相形态产生良好的磨损率，同时允许电荷的快速传输并因此感光鼓的快速放电性能。

    Photo Conductor Overcoat Comprising Radical Polymerizable Charge Transport Molecules and Hexa-Functional Urethane Acrylates
    8.
    发明申请
    Photo Conductor Overcoat Comprising Radical Polymerizable Charge Transport Molecules and Hexa-Functional Urethane Acrylates 有权
    光导体覆盖层包含可自由基聚合的电荷传输分子和六官能聚氨酯丙烯酸酯

    公开(公告)号：US20150099225A1

    公开(公告)日：2015-04-09

    申请号：US14569948

    申请日：2014-12-15

    申请人： Lexmark International, Inc.

    发明人： Mark Thomas Bellino ,  David Glen Black ,  Weimei Luo ,  Scott Daniel Reeves

    IPC分类号： G03G5/06

    CPC分类号： G03G5/0618 ,  G03G5/14734 ,  G03G5/14769 ,  G03G5/14786 ,  G03G5/14791

    摘要： A method of preparing a photoconductor drum having an overcoat layer is provided. The photoconductor drum is used in an electrophotographic image forming device. The photoconductor drum is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the photoconductor drum without negatively altering the electrophotographic properties, thus protecting the photoconductor drum from damage and extending its useful life.

    摘要翻译： 提供了制备具有外涂层的感光鼓的方法。 感光鼓用于电子照相成像装置中。 感光鼓由包含具有至少六个可自由基聚合的官能团的聚氨酯树脂和具有至少一个可自由基聚合的官能团的电荷传输分子的可固化组合物制备。 在可固化组合物中具有至少六个可自由基聚合的官能团的聚氨酯树脂的量为约35重量％至约65重量％。 在可固化组合物中具有至少一个可自由基聚合的官能团的电荷传输分子的量为约35重量％至约65重量％。 该外涂层提高了感光鼓的耐磨性，而不会不利地改变电子照相性能，从而保护感光鼓免受损坏并延长其使用寿命。