Photosensitive composition comprising a phenol resin having a urea bond in the main chain
AssigneeKodak Polychrome Graphics LLC
InventorsYasuhiro Ishizuka, Yasuhiko Kojima
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Abstract
Photosensitive compositions comprising a phenol resin having a urea bond in the main chain, planographic printing plate precursors containing the photosensitive compositions, and methods for preparing planographic printing plates using the planographic printing plate precursors are disclosed. Planographic printing plates that exhibit good durability, good exposure visual image property, and good solvent resistance; particularly superior resistance to washing oil used in UV ink printing; and superior baking property are produced.
Claims15
A photosensitive composition comprising a phenol resin having a urea bond in the main chain;
- in which the photosensitive composition is selected from the group consisting of:
- positive-working photosensitive compositions comprising the phenol resin and a quinone diazide compound;
- negative-working photosensitive compositions comprising the phenol resin and a photosensitive diazonium compound;
- negative-working photosensitive compositions comprising the phenol resin, an ethylenically unsaturated compound, and a radical polymerization initiator;
- positive-working photosensitive compositions comprising the phenol resin and a photothermal conversion material;
- and
- negative-working photosensitive compositions comprising the phenol resin, an acid generating agent, an acid crosslinking agent, and the photothermal conversion material.
A photosensitive planographic printing plate precursor comprising a substrate and a photosensitive layer on the surface of the substrate;
- in which:
- the photosensitive layer comprises a photosensitive composition;
- the photosensitive composition comprises a phenol resin having a urea bond in the main chain;
- and
- the photosensitive composition is selected from the group consisting of:
- positive-working photosensitive compositions comprising the phenol resin and a quinone diazide compound;
- negative-working photosensitive compositions comprising the phenol resin and a photosensitive diazonium compound;
- negative-working photosensitive compositions comprising the phenol resin, an ethylenically unsaturated compound, and a radical polymerization initiator;
- positive-working photosensitive compositions comprising the phenol resin and a photothermal conversion material;
- and
- negative-working photosensitive compositions comprising the phenol resin, an acid generating agent, an acid crosslinking agent, and the photothermal conversion material.
A method for manufacturing a planographic printing plate, the method comprising the steps of:
- imaging a photosensitive layer of a photosensitive planographic printing plate precursor and forming an imaged precursor;
- and
- developing the imaged precursor in an aqueous alkaline solution and forming the planographic printing plate;
- in which:
- the photosensitive layer comprises a photosensitive composition;
- the photosensitive composition comprises a phenol resin having a urea bond in the main chain;
- and
- the photosensitive composition is selected from the group consisting of:
- positive-working photosensitive compositions comprising the phenol resin and a quinone diazide compound;
- negative-working photosensitive compositions comprising the phenol resin and a photosensitive diazonium compound;
- negative-working photosensitive compositions comprising the phenol resin, an ethylenically unsaturated compound, and a radical polymerization initiator;
- positive-working photosensitive compositions comprising the phenol resin and a photothermal conversion material;
- and
- negative-working photosensitive compositions comprising the phenol resin, an acid generating agent, an acid crosslinking agent, and the photothermal conversion material.
Dependencies are inferred from the claim text.