Claims
- 1. A planographic printing plate precursor comprising a support having disposed thereon a recording layer including:
a lower layer containing a water-insoluble and alkali-soluble polyurethane resin; and an upper layer containing a water-insoluble and alkali-soluble resin and a development inhibitor and exhibiting enhanced solubility in an aqueous alkali solution through light exposure, wherein at least one of the lower layer and the upper layer of the recording layer contains an infrared absorber.
- 2. The photographic printing plate precursor according to claim 1, wherein the polyurethane resin has a weight average molecular weight of from 5,000 to 100,000.
- 3. A planographic printing plate precursor comprising a support having disposed thereon a recording layer that contains a polyimide precursor resin containing a structural unit represented by the following formula (1) and exerting water-insolubility and alkali-solubility, a development inhibitor and an infrared absorber, and exhibits enhanced solubility in an aqueous alkali solution through light exposure:
- 4. The planographic printing plate precursor according to claim 3, wherein the polyimide precursor resin has a weight average molecular weight of from 3,000 to 100,000.
- 5. The planographic printing plate precursor according to claim 3, wherein the polyimide precursor resin is contained in an amount of from 20 to 90% by mass based on the total solid content of the recording layer.
- 6. A planographic printing plate precursor comprising a support having disposed thereon a recording layer including:
a lower layer containing a polyimide precursor resin having a structural unit represented by the following formula (1) and exerting water-insolubility and alkali-solubility; and an upper layer containing a water-insoluble and alkali-soluble resin and a development inhibitor and exhibiting enhanced solubility in an aqueous alkali solution through light exposure, wherein at least one of the lower layer and the upper layer of the recording layer contains an infrared absorber, 111wherein R1 represents a linking group containing at least one aromatic ring to which a —COOH group directly bonds; and R2 represents an alkylene group, an arylene group or an aralkylene group.
- 7. The planographic printing plate precursor according to claim 6, wherein the polyimide precursor resin has a weight average molecular weight of from 3,000 to 100,000.
- 8. The planographic printing plate precursor according to claim 6, wherein the polyimide precursor resin is contained in an amount of from 40 to 90% by mass based on the total solid content of the lower layer.
- 9. A planographic printing plate precursor comprising a support having disposed thereon a recording layer that contains a water-insoluble and alkali-soluble resin having a urea bond in a polymer main chain, a development inhibitor and an infrared absorber, and exhibits enhanced solubility in an aqueous alkali solution through light exposure.
- 10. The planographic printing plate precursor according to claim 9, wherein the resin having a urea bond in a polymer main chain has a weight average molecular weight of from 3,000 to 200,000.
- 11. The planographic printing plate precursor according to claim 9, wherein the resin having a urea bond in a polymer main chain is contained in an amount of 10% by mass or more relative to a total alkali-soluble resin in the recording layer.
- 12. A planographic printing plate precursor comprising a support having disposed thereon a recording layer including:
a lower layer containing a water-insoluble and alkali-soluble resin having a urea bond in a polymer main chain; and an upper layer containing a water-insoluble and alkali-soluble resin and a development inhibitor and exhibiting enhanced solubility in an aqueous alkali solution through light exposure, wherein at least one of the lower layer and the upper layer of the recording layer contains an infrared absorber.
- 13. The planographic printing plate precursor according to claim 12, wherein the resin having a urea bond in a polymer main chain has a weight average molecular weight of from 3,000 to 200,000.
- 14. The planographic printing plate precursor according to claim 12, wherein the resin having a urea bond in a polymer main chain is contained in an amount of 10% by mass or more relative to a total alkali-soluble resin in the lower layer of the recording layer.
- 15. A planographic printing plate precursor comprising a support having disposed thereon a recording layer that contains a water-insoluble and alkali-soluble resin having an amide bond in a polymer main chain, a development inhibitor and an infrared absorber, and exhibits enhanced solubility in an aqueous alkali solution through light exposure.
- 16. The planographic printing plate precursor according to claim 15, wherein the resin having an amide bond in a polymer main chain has a weight average molecular weight of from 5,000 to 200,000.
- 17. The planographic printing plate precursor according to claim 15, wherein the resin having an amide bond in a polymer main chain is used in combination with a novolak resin.
- 18. A planographic printing plate precursor comprising a support having disposed thereon a recording layer including:
a lower layer containing a water-insoluble and alkali-soluble resin having an amide bond in a polymer main chain; and an upper layer containing a water-insoluble and alkali-soluble resin and a development inhibitor and exhibiting enhanced solubility in an aqueous alkali solution through light exposure, wherein at least one of the lower layer and the upper layer of the recording layer contains an infrared absorber.
- 19. The planographic printing plate precursor according to claim 18, wherein the resin having an amide bond in a polymer main chain has a weight average molecular weight of from 5,000 to 200,000.
- 20. The planographic printing plate precursor according to claim 18, wherein the resin having an amide bond in a polymer main chain is used in combination with a resin selected from the group consisting of a polyamide resin, an epoxy resin, a polyacetal resin, an acrylic resin, a methacrylic resin, a polystyrene resin, a novolak type phenol resin and a polyurethane resin.
Priority Claims (4)
Number |
Date |
Country |
Kind |
2002-325280 |
Nov 2002 |
JP |
|
2002-325282 |
Nov 2002 |
JP |
|
2002-333942 |
Nov 2002 |
JP |
|
2003-25929 |
Feb 2003 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority under 35 USC 119 from Japanese Patent Application Nos. 2002-325280, 2002-325282, 2002-333942 and 2003-25929, the disclosures of which are incorporated herein by reference.