ELECTROSTATIC THICKNESS MEASUREMENT OF CONTINUOUS SHEETS

    公开(公告)号:AU590732B2

    公开(公告)日:1989-11-16

    申请号:AU4937985

    申请日:1985-11-04

    Applicant: HOECHST AG

    Abstract: Disclosed is a process and apparatus for measuring, in a continuous and contact-free manner, the thickness of a layer applied to a support. The apparatus includes a measuring apparatus which comprises a corona and a first electrostatic voltmeter positioned downstream of the corona in the direction of travel of the layer being measured. The process includes the steps of passing the layer under the apparatus, charging the layer in a contact-free manner, and measuring the level of the charging voltage.

    ELECTROPHOTOGRAPHIC RECORDING MATERIAL

    公开(公告)号:AU3195884A

    公开(公告)日:1985-02-21

    申请号:AU3195884

    申请日:1984-08-15

    Applicant: HOECHST AG

    Abstract: Disclosed is an electrophotographic recording material comprising a photoconductive double layer disposed on an electrically conductive support, which double layer comprises a charge carrier-generating layer and a charge transport layer. The interface region of the charge carrier-generating and charge transport layers defines a mixing zone into which one or more of the constituents of the separate layers have diffused. A process for producing the electrophotographic recording material is also disclosed.

    MEASURING THICKNESS
    5.
    发明专利

    公开(公告)号:AU4937985A

    公开(公告)日:1986-05-08

    申请号:AU4937985

    申请日:1985-11-04

    Applicant: HOECHST AG

    Abstract: Disclosed is a process and apparatus for measuring, in a continuous and contact-free manner, the thickness of a layer applied to a support. The apparatus includes a measuring apparatus which comprises a corona and a first electrostatic voltmeter positioned downstream of the corona in the direction of travel of the layer being measured. The process includes the steps of passing the layer under the apparatus, charging the layer in a contact-free manner, and measuring the level of the charging voltage.

    LOW CONCENTRATION PHOTOCONDUCTIVE PIGMENT IN ELECTROPHOTOGRAPHIC PLATE

    公开(公告)号:AU4251385A

    公开(公告)日:1985-11-21

    申请号:AU4251385

    申请日:1985-05-15

    Applicant: HOECHST AG

    Inventor: LINGNAU JURGEN

    Abstract: An electrophotographic recording material is disclosed comprising an electrically conductive support, a photoconductive layer and, optionally, an insulating barrier layer between the substrate and photoconductive layer. The photoconductive layer comprises at least one organic, n-type conducting pigment in a concentration between 10 and 50, preferably between 15 and 30, percent by weight, relative to the photoconductive layer weight, at least one electronically inert, carbonyl group-containing binder and an organic, p-type conducting photoconductor in a concentration from 0 to 20, preferably from 2 to 8 percent by weight, relative to the photoconductive layer weight. The n-type conducting pigment preferably comprises a compound selected from the trans-perinones, the perylene-tetracarboxylic acid diimides, and the condensed quinones.

    7.
    发明专利
    未知

    公开(公告)号:FI901179A0

    公开(公告)日:1990-03-08

    申请号:FI901179

    申请日:1990-03-08

    Applicant: HOECHST AG

    Abstract: A radiation-curable mixture is proposed which contains a compound which forms an acid when exposed to high-energy radiation and a compound which is acid-cleavable, and which is characterised in that the compound which forms an acid contains aliphatically bound halogen (chlorine or bromine) and has a pKa of less than 12 or is a derivative of a compound having such a pKa, which derivative can be converted into the free compound by acid catalysis. The composition claimed, and in particular the recording material prepared therefrom, has a higher sensitivity and an improved resolution, and in addition exhibits no image haze after development.

    8.
    发明专利
    未知

    公开(公告)号:FI901178A0

    公开(公告)日:1990-03-08

    申请号:FI901178

    申请日:1990-03-08

    Applicant: HOECHST AG

    Abstract: A positive radiation-sensitive mixture is disclosed which contains a compound which forms an acid under the action of high-energy radiation, and an acid-cleavable compound, wherein the compound which forms an acid contains aliphatically bound halogen (chlorine or bromine) and has a pKa value of less than about 12 or is a derivative of a compound having such a pKa value which can be converted into the free compound by acid catalysis. A positive recording material and a process for recording high-energy radiation using the material are also disclosed. The mixture, and in particular the recording material produced therefrom, has relatively high sensitivity and improved resolution and, in addition, does not exhibit image fogging after development.

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