4.
    发明专利
    未知

    公开(公告)号:DE4401940A1

    公开(公告)日:1995-07-27

    申请号:DE4401940

    申请日:1994-01-24

    Applicant: HOECHST AG

    Abstract: Positive copying material has an Al base and a matted radiation-sensitive layer contg. a 1,2-naphthoquinone-2-diazide as radiation-sensitive cpd. and a water-insol. binder which dissolved or swells in aq. alkali. The novel features are that: (a) the diazide is an ester (I) of 1,2-naphthoquinone-2-diazide 4- or 5-sulphonic acid and a phenolic cpd. with at least 2 phenolic OH gps., which contains at least 0.5 mmole/g of phenolic OH gps. and at least 1.5 mmole/g of diazo units; (b) the binder is a phenol/formaldehyde-novolak (II), which contains at least 5 mmole/g of phenolic OH gps. and at least 30 mole % m-cresol and at least 10 mole % xylenol as phenol component and has a Mw of 2000-12000; and (c) the layer also contains phenolic additive(s) (III) having a Mw of max. 600 and contg. 2-4 uncondensed phenyl rings and at least 6 mmole/g of phenolic OH gps.

    6.
    发明专利
    未知

    公开(公告)号:DE19510526A1

    公开(公告)日:1996-09-26

    申请号:DE19510526

    申请日:1995-03-23

    Applicant: HOECHST AG

    Abstract: The binder used in an electrophotographic recording material comprising an electrically conductive carrier and an aq. alkali soln.-delaminable photosensitive layer comprising an organic photoconductor, a sensitiser and a binder is a mixt. of (a) a copolymer with vinyl aromatic units and maleic anhydride (and/or partial ester) units; and (b) a copolymer with vinyl aromatic and (meth)acrylic acid units.

    8.
    发明专利
    未知

    公开(公告)号:DE4423140A1

    公开(公告)日:1996-01-04

    申请号:DE4423140

    申请日:1994-07-01

    Applicant: HOECHST AG

    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.

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