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    ALUMINUM-CONTAINING SUPPORT MATERIAL FOR OFFSET PRINTING PLATES
    2.
    发明专利
    ALUMINUM-CONTAINING SUPPORT MATERIAL FOR OFFSET PRINTING PLATES 未知

    公开(公告)号：AU5328086A

    公开(公告)日：1986-08-14

    申请号：AU5328086

    申请日：1986-02-06

    Applicant: HOECHST AG

    Inventor： BRENK MICHAEL ,  ERNST RENATE

    IPC: B41N1/08 ,  B41N3/03 ,  B41N3/08 ,  G03C1/94

    Abstract: 1. A support material in the form of plates, sheets or webs for offset printing plates, composed of aluminum, which may have been pretreated, or its alloys, carrying on at least one side a hydrophilic coating of a phosphonic acid compound, wherein the hydrophilic coating comprises a) a polymer of acrylamidoisobutylenephosphonic acid or b) a copolymer of acrylamide and acrylamidoisobutylenephosphonic acid or c) a salt of a) or b) with an at least divalent metal cation.

    PROCESS FOR ELECTROCHEMICAL ROUGHENING OF ALUNINUM FOR PRINTING PLATE SUPPORTS
    4.
    发明专利
    PROCESS FOR ELECTROCHEMICAL ROUGHENING OF ALUNINUM FOR PRINTING PLATE SUPPORTS 未知

    公开(公告)号：CA2034426A1

    公开(公告)日：1991-07-20

    申请号：CA2034426

    申请日：1991-01-17

    Applicant: HOECHST AG

    Inventor： PLIEFKE ENGELBERT ,  BRENK MICHAEL

    IPC: B41N3/03 ,  C25F3/04 ,  B41N3/04

    Abstract: A process for roughening aluminum or alloys thereof for printing plate supports, wherein an electrochemical roughening is preformed by means of alternating current in an acidic electrolyte including sulfate ions and chloride ions, the chloride ions being in the form of aluminum chloride. In a preceding or subsequent roughening stage, mechanical roughening and/or electrochemical roughening by means of alternating current in an electrolyte is carried out. The electrolyte can include hydrochloric acid and aluminum ions, nitric acid and aluminum ions or sulfuric acid and chloride ions.

    ANODIC OXIDATION OF ALUMINUM IN PHOSPHORIC ACID CONTAINING ALUNINUM IONS FOR PRINTING PLATES
    5.
    发明专利
    ANODIC OXIDATION OF ALUMINUM IN PHOSPHORIC ACID CONTAINING ALUNINUM IONS FOR PRINTING PLATES 未知

    公开(公告)号：CA1236421A

    公开(公告)日：1988-05-10

    申请号：CA478562

    申请日：1985-04-09

    Applicant: HOECHST AG

    Inventor： BRENK MICHAEL

    IPC: G03F7/00 ,  B41N3/00 ,  B41N3/03 ,  C25D11/04 ,  C25D11/08

    Abstract: In the process for the anodic oxidation of mechanically, chemically and/or electrochemically roughened aluminum or of one of its alloys, an aqueous electrolyte, which is free from H2SO4 and contains H3PO4 and Al+3 ions is used. The process parameters are: an electrolyte content of 25 g/l to 500 g/l of H3PO4 and at least 5 g/l of Al+3 ions, a treatment time of 5 seconds to 500 seconds, a current density of 1 A/dm2 to 30 A/dm2 and a temperature of 35.degree.C to 95.degree.C. The Al+3 ion source in particular is a salt of aluminum having a phosphoroxo anion, such as AlPO4. The material prepared in accordance with this invention is preferably employed as a support material for offset printing plates which carry a radiation-sensitive layer.

    7.
    发明专利
    未知

    公开(公告)号：BR9503065A

    公开(公告)日：1996-06-11

    申请号：BR9503065

    申请日：1995-07-03

    Applicant: HOECHST AG

    Inventor： BRENK MICHAEL ,  EICHHORN MATHIAS ,  ELSAESSER ANDREAS

    IPC: G03F7/09 ,  B41N3/03 ,  G03F7/00 ,  G03G5/14

    Abstract: A mechanically and/or electrochemically roughened, and opt. anodically oxidised, carrier is made of aluminium or its alloys. The carrier carries a hydrophilic layer made from at least one polymer with basic and acidic groups. On the layer is a further hydrophilic layer that contains at least one compound with at least one phosphono group. Also claimed a process for the prodn. of the carrier; and a recording material with a radiation sensitive layer on the carrier.

    8.
    发明专利
    未知

    公开(公告)号：BR9100220A

    公开(公告)日：1991-10-22

    申请号：BR9100220

    申请日：1991-01-18

    Applicant: HOECHST AG

    Inventor： PLIEFKE ENGELBERT ,  BRENK MICHAEL

    IPC: B41N3/03 ,  C25F3/04 ,  B41N3/02

    Abstract: Method of roughening the surface of Al(alloys) which are to be used to produce printing plates consists of subjecting the plates before or after the main electrochemical roughening stage to a mechanical dry or wet roughening or an electrochemical roughening using an AC is an electrolyte containing HCl and Al ions as Al chloride; HNO3 and Al ions as Al nitrate; or H2SO4 and chloride ions as Al chloride. Main roughening stage involves using an AC in an electrolyte containing acid sulphate- and chloride-ions.

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