Claims
- 1. An imaging element for making a lithographic printing plate comprising a lithographic support and an imaging layer comprising(i) a polymer having aryldiazosulfonate units and/or aryltriazenylsulfonate units and (ii) a compound capable of generating a radical and/or an acid upon exposure to UV light.
- 2. Imaging element according to claim 1 wherein said polymer having aryldiazosulfonate units corresponds to the following formula (I): wherein R0,1,2 each independently represent hydrogen, an alkyl group, a nitrile group or a halogen group, L represents a divalent linking group, n represents 0 or 1, A represents an aryl group and M represents a cation.
- 3. Imaging element according to claim 1 wherein said polymer having aryltriazenylsulfonate units corresponds to the following formula (II): wherein R0,1,2 each independently represent hydrogen, an alkyl group, a nitrile group or a halogen group, L represents a divalent linking group, n represents 0 or 1, and A represents an aryl group and wherein R4 and R5 are independent and represent a hydrogen, a heterocyclic group, an aliphatic group, an aromatic group or an alicyclic group; and at least one of R4 and R5 is substituted with a sulfonate group.
- 4. Imaging element according to claim 1 wherein said compound capable of generating a radical upon exposure to UV-light is selected from the group consisting of triazines, thioxanthones, imidazoles or mercaptobenzoxazoles.
- 5. Method for making a lithographic printing plate comprising the steps of:1. providing an imaging element comprising an imaging layer comprising (i) a polymer having aryldiazosulfonate units and/or aryltriazenylsulfonate units and (ii) a compound capable of generating a radical and/or an acid upon exposure to UV light; 2. image-wise exposing said imaging element to UV-light; 3. mounting the imaging element on a press; and 4. developing the imaging element by applying water or an aqueous solution.
- 6. Method according to claim 5, wherein the aqueous solution is a fountain solution.
- 7. Method according to claim 5, wherein during the developing step also ink is provided.
- 8. Method according to claim 5, wherein first fountain and subsequently ink is applied.
- 9. Method according to claim 5, comprising an additional step of overall UV-exposing the developed imaging element.
Priority Claims (1)
Number |
Date |
Country |
Kind |
01000211 |
Jun 2001 |
EP |
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Parent Case Info
This application claims the benefit of U.S. Provisional Patent Application No. 60/307,462, filed Jul. 24, 2001, which is incorporated by reference.
US Referenced Citations (9)
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Provisional Applications (1)
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Number |
Date |
Country |
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60/307462 |
Jul 2001 |
US |