DIRECTLY IMAGEABLE WATERLESS PLANOGRAPHIC PRINTING PLATE PRECURSOR AND METHOD FOR PRODUCING SAME

    公开(公告)号:CA2753841A1

    公开(公告)日:2010-10-07

    申请号:CA2753841

    申请日:2010-03-31

    Abstract: Provided is a precursor for a direct printing-type waterless lithographic printing plate which shows high sensitivity not only immediately after the production of the precursor but also after the passage of time. A precursor for a direct printing-type waterless lithographic printing plate, which at least comprises a heat-sensitive layer and a silicone rubber layer that are laminated on a substrate in this order, wherein said heat-sensitive layer comprises a liquid foam which contains a liquid having a boiling point within a range of 210-270oC. A method for producing a precursor for a direct printing-type waterless lithographic printing plate, at least comprising: a step for applying a heat-sensitive layer composition solution, which contains a solvent having a solubility parameter of 17.0 (MPa)1/2 or less and a boiling point within a range of 210-270oC and a solvent having a solubility parameter exceeding 17.0 (MPa)1/2, onto a substrate optionally provided with a resin layer laminated thereon; a step for drying said heat-sensitive layer composition solution to form a heat-sensitive layer; and a step for applying a silicone rubber layer composition onto said heat-sensitive layer to form a silicone rubber layer.

    WATERLESS LITHOGRAPHIC PRINTING PLATE

    公开(公告)号:JPH10301274A

    公开(公告)日:1998-11-13

    申请号:JP10938397

    申请日:1997-04-25

    Abstract: PROBLEM TO BE SOLVED: To obtain a waterless lithographic printing plate superior in image reproducibility and storage stability and good in printing durability by incorporating an acetone-pyrogallol resin having quinonediazido groups and a polyurethane resin having hydroxy groups and by forming a cross-linked structure with an isocyanat compound in a photosensitive layer. SOLUTION: This waterless lithographic printing plate is formed by laminating a primer layer, photosensitive layer and a silicone rubber layer in this order on a substrate. The photosensitive layer contains an acetone-pyrogallol resin having quinonediazido groups and a polyurethane resin having hydroxy groups whose the glass transition temp. is

    WATERLESS LITHOGRAPHIC PRINTING MASTER PLATE

    公开(公告)号:JPH10246953A

    公开(公告)日:1998-09-14

    申请号:JP4924697

    申请日:1997-03-04

    Abstract: PROBLEM TO BE SOLVED: To obtain good reproducibility of image and excellent storage stability, by forming such a photosensitive layer that contains a specified acetone pyrogallol resin having quinonediazido groups and an org. acid and that the acetone pyrogallol resin forms a crosslinked structure. SOLUTION: This waterless lithographic printing master plate consists of at least a primer layer, photosensitive layer and silicone rubber layer formed in this order on a substrate, and the photosensitive layer contains an acetone pyrogallol resin having a structure expressed by the formula and having quinonediazido groups, and org. acid. The acetone pyrogallol resin forms a crosslinked structure. The acetone pyrogallol resin is esterified with 1,2- naphthoquinone-2-diazide-5-sulfonic chloride and the like. In the formula, X, Y and Z are independently hydroxyl groups or ester groups of sulfonic acid of quinonediazide, and n is an integer 5 to 12.

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