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    Electrophotographic recording material having a layered structure of charge generating and charge transport layers
    1.
    发明授权
    Electrophotographic recording material having a layered structure of charge generating and charge transport layers 失效
    具有电荷产生和电荷输送层的分层结构的电子照相记录材料

    公开(公告)号：US3895944A

    公开(公告)日：1975-07-22

    申请号：US35420273

    申请日：1973-04-25

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG ,  ZIMMER HORST

    IPC: G03G5/14 ,  G03G5/04

    CPC classification number: G03G5/14

    Abstract: This invention relates to an electrophotographic recording material consisting of an electroconductive support material and a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer in which the dyestuff corresponds to the following general formula

    wherein: A stands for nitrogen or CR, with R being hydrogen, alkyl with 1 to 4 carbon atoms, phenyl, which may be substituted by alkyl with 1 to 4 carbon atoms, or halogen, and B and B'' may be the same or different and stand for an aromatic or heterocyclic group, which may be substituted and D stands for CH- or N-, and of a transparent top layer of insulating materials containing at least one charge transporting compound.

    Abstract translation: 本发明涉及由导电支撑材料和有机材料的光电双层组成的电子照相记录材料，其由均匀的不透明的电荷载体生产染料层组成，其中染料对应于以下通式A --- B --- AA --- B'--- A其中：

    Electrophotographic recording material with quinacridones
    2.
    发明授权
    Electrophotographic recording material with quinacridones 失效
    电子记录材料与QUINACRIDONES

    公开(公告)号：US3888665A

    公开(公告)日：1975-06-10

    申请号：US35418373

    申请日：1973-04-25

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG

    IPC: G03G5/047 ,  G03G5/06 ,  G03G5/14 ,  G03G5/02

    CPC classification number: G03G5/047 ,  G03G5/06 ,  G03G5/14

    Abstract: This invention relates to an electrophotographic recording material consisting of an electroconductive support material and a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer of a compound corresponding to one of the general formulae

    WHEREIN R and R1 may be the same or different and stand for hydrogen, alkyl or alkoxyl with 1 to 4 carbon atoms, halogen, a nitro group, a hydroxyl group, or together form a fused benzene or naphthalene group, AND OF A TRANSPARENT TOP LAYER OF INSULATING MATERIALS CONTAINING AT LEAST ONE CHARGE TRANSPORTING COMPOUND.

    3.
    发明专利
    未知

    公开(公告)号：BR9502487A

    公开(公告)日：1995-12-19

    申请号：BR9502487

    申请日：1995-05-19

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG

    IPC: B41M7/00 ,  B41N1/08 ,  B41N3/03 ,  C25D11/18 ,  C25D11/20 ,  C25D11/24

    Abstract: Plates which have been chemically, mechanically or electrochemically roughened are anodised and then treated in an aqueous solution of a pure and crystalline alkali metal silicate followed by rinsing in an ion-containing water.

    PROTECTIVE COATING FOR ELECTROPHOTOGRAPHIC MEMBER
    5.
    发明专利
    PROTECTIVE COATING FOR ELECTROPHOTOGRAPHIC MEMBER 未知

    公开(公告)号：AU540031B2

    公开(公告)日：1984-10-25

    申请号：AU7426581

    申请日：1981-08-18

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG

    IPC: G03G5/00 ,  G03G5/14 ,  G03G5/147

    Abstract: An electrophotographic recording material comprising an electrically conductive support, an optional insulating intermediate layer, at least one photoconductive layer comprising a charge carrier generating compound and a charge transporting compound, and a protective transparent cover layer made from a surface abrasion resistant binder composed of a polyurethane resin, polycarbonate resin, phenoxy resin, polyacrylate or polymethacrylate resin, polyurethane formed from a two-component system comprising a polyisocyanate and a hydroxyl group containing polyester or polyether, a polyisocyanate and a hydroxyl group containing acrylic or epoxy resin, polyurethane formed from a one-component system comprising a polyisocyanate prepolymer, or a polyisocyanate having temporarily masked isocyanate groups.

    ELECTROPHOTOGRAPHIC RECORDING MATERIAL
    8.
    发明专利
    ELECTROPHOTOGRAPHIC RECORDING MATERIAL 未知

    公开(公告)号：AU8428682A

    公开(公告)日：1982-12-09

    申请号：AU8428682

    申请日：1982-05-28

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG

    IPC: G03G5/00 ,  G03G5/14 ,  G03G5/147

    Abstract: An electrophotographic recording material comprised of an electrically conductive support, an optional insulating interlayer, a photoconductive system comprised of at least one layer of organic material containing a charge carrier-producing compound and a charge-transporting compound, and a radiation-cured, transparent protective layer, wherein the protective layer has been applied onto the surface of the photoconductive system with the aid of a removable auxiliary support and is comprised of an acrylated binder which is cured by irradiation with ultraviolet light. Also disclosed is a process for the production of the recording material.

    MULTILAYER RECORDING MEDIUM FOR OPTICAL INFORMATION
    9.
    发明专利
    MULTILAYER RECORDING MEDIUM FOR OPTICAL INFORMATION 未知

    公开(公告)号：CA1318024C

    公开(公告)日：1993-05-18

    申请号：CA588943

    申请日：1989-01-24

    Applicant: HOECHST AG

    Inventor： WIEDEMANN WOLFGANG

    IPC: G11B7/24 ,  B41M5/26 ,  G11B7/241 ,  G11B7/244 ,  G11B7/248 ,  G11B7/249 ,  G11B7/2492 ,  G11B7/253 ,  G11B7/2534 ,  G11B7/257 ,  G11B7/2575 ,  G11B7/26

    Abstract: The invention describes a multilayer recording medium for optical information for use in a single recording operation and the process for its production. The multilayer recording medium essentially comprises a support and a layer comprising an unsubstituted naphthalocyanine dye. A binder layer is disposed between the support and the dye layer or the dye layer carries a binder layer which, in turn, is coated with a dye layer. Moreover, the invention describes composite systems, in particular, adhesive-bonded systems constructed from these multilayer recording media. As compared to recording media of the prior art, the media and composite systems according to the present invention exhibit a high reflectivity and require a lower write-pulse energy, while maintaining a particular contrast ratio.

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