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US 11,543,750 B2Granted
Lithographic printing plate precursor and method for producing lithographic printing plate
AssigneeFUJIFILM Corporation
InventorsKeisuke Nogoshi, Takeshi Inasaki, Kazuaki Enomoto
Life of this patent
Estimating the term…
Abstract
A lithographic printing plate precursor has an image-recording layer on a hydrophilic support, in which the image-recording layer contains an infrared absorbing dye that decomposes by exposure to an infrared ray and a color developer that develops color due to the exposure to an infrared ray. A method for producing a lithographic printing plate includes image-exposing the lithographic printing plate precursor using an infrared laser.
Claims17
A lithographic printing plate precursor comprising:
- an image-recording layer on a hydrophilic support,
- wherein the image-recording layer contains an infrared absorbing dye that decomposes by exposure to an infrared ray and a color developer that develops color due to the exposure to an infrared ray,
- the infrared absorbing dye is a cyanine dye, and
- the cyanine dye is a cyanine dye represented by the following Formula 2,
- wherein, in the Formula 2, R1 represents a group in which an R1-L bond is cleaved by exposure to an infrared ray, R2 and R3 each independently represent a hydrogen atom or an alkyl group or R2 and R3 may be linked to each other to form a ring, Ar1 and Ar1 each independently represent a group forming a benzene ring or a naphthalene ring, Y1 and Y2 each independently represent an oxygen atom, a sulfur atom, —NR0—, or a dialkyl methylene group, R0 represents a hydrogen atom, an alkyl group, or an aryl group, R4 and R5 each independently represent an alkyl group, a —CON group, or a —PO3M2 group, M represents a hydrogen atom, a Na atom, a K atom, or an onium group, R6 to R9 each independently represent a hydrogen atom or an alkyl group, L represents (a) a sulfur atom, and R1 is a group represented by the following Formula (2-1), or (b) —NR10—, R10 represents a hydrogen atom, an alkyl group, or an aryl group, and R1 that bonds to N is a group represented by the following Formula (3-1), and Za represents a counter ion that neutralizes a charge,
- wherein, in the Formula (2-1), ● represents a bonding site with the sulfur atom represented by L in the Formula 2, R21's each independently represent a hydrogen atom, an alkyl group, or an aryl group, and R22 represents an aryl group, an alkenyl group, an alkoxy group, or an onium group,
- wherein, in the Formula (3-1), ● represents a bonding site with a nitrogen atom included in L in the Formula 2, X1 and X2 each independently represent an oxygen atom or a sulfur atom, and Y represents a group represented by the Formula (2-1).
4 more elements
Dependencies are inferred from the claim text.