# US 8,785,107 B2 · Lithographic printing plate precursor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,107 B2 - Document ID: US8785107B2 - Status: Granted - Kind: B2 - Application number: 13/825,136 - Filed: 2011-08-19 - Published: 2013-08-01 - Granted: 2014-07-22 - Earliest claimed: 2010-09-22 - Assignees: Eastman Kodak Company - Applicants: Koji Hayashi - Inventors: Koji Hayashi - Web page: https://patentgrep.com/patent/US8785107B2 ## CPC - G03F 7/0046: {with perfluoro compounds, e.g. for dry lithography (G03F7/0048 takes precedence)} - B41C 1/1008: {by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials} - G03F 7/029: Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur - G03F 7/033: the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers - G03F 7/0388: {with ethylenic or acetylenic bands in the side chains of the photopolymer} - G03F 7/3035: {from printing plates fixed on a cylinder or on a curved surface; from printing cylinders} - B41C 2210/04: Negative working, i.e. the non-exposed (non-imaged) areas are removed - B41C 2210/06: Developable by an alkaline solution - B41C 2210/08: Developable by water or the fountain solution - B41C 2210/24: characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers - G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G) - B41C: PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES (photomechanical processes for producing printing surfaces G03F; photoelectrical processes for producing printing surfaces G03G) ## Abstract A lithographic printing plate precursor is provided that exhibits less blooming without using a specific polymerization initiator, infrared radiation absorbing agent and the like. The lithographic printing plate precursor comprises a substrate having thereon an image forming layer comprising a radiation-sensitive composition which comprises a radical polymerizable component, an infrared radiation absorbing agent and a radical polymerization initiator, wherein the radiation-sensitive composition comprises a fluorinated copolymer substantially having no hydrophilic moiety. ## Claims ### Claim 1 A lithographic printing plate precursor comprising a substrate having thereon an image forming layer comprising a radiation-sensitive composition which comprises a radical polymerizable component, an infrared radiation absorbing agent and a radical polymerization initiator, wherein the radiation-sensitive composition comprises a fluorinated copolymer having no hydrophilic moiety selected from cationic, anionic, acidic and polyoxyethylene groups. ### Claim 2 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the fluorinated copolymer is represented by the following Formula (A) and comprises at least two monomer units represented by the following formulas (I) and (II): wherein R1 and R2 are hydrogens or methyl groups, Rf represents an aliphatic group substituted with a fluorine atom, Z represents a divalent organic group, and X represents an optional organic group which does not contain a hydrophilic moiety selected from a cationic group, an anionic group, an acidic group and polyoxyethylene group. ### Claim 3 (depends on 2) The lithographic printing plate precursor according to claim 2, wherein the fluorinated copolymer comprises 10 to 97 mol % of a monomer unit of the formula (I) and 3 to 90 mol % of a monomer unit of the formula (II). ### Claim 4 (depends on 2) The lithographic printing plate precursor according to claim 2, wherein Rf of the formula (A) is an aliphatic group having 1 to 20 carbon atoms in which at least two hydrogen atoms of the terminal carbon are substituted with a fluorine atom. ### Claim 5 (depends on 2) The lithographic printing plate precursor according to claim 2, wherein X of the formula (A) represents a —CO-A-Y group, A represents an oxygen atom or NR4—, in which R4 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms, and Y is selected from the group consisting of an alkyl group which may have a substituent, an aryl group which may have a substituent, and a monovalent organic group having an unsaturated group. ### Claim 6 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the fluorinated copolymer having no hydrophilic moiety selected from cationic, anionic, acidic and polyoxyethylene groups further comprises a monomer unit having a maleimide structure represented by the following formula (1): wherein R represents a hydrogen atom or a hydrocarbon group selected from the group consisting of an alkyl group, an alkenyl group and an aryl group. ### Claim 7 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the radical polymerization initiator is selected from the group consisting of a sulfonium salt, an iodonium salt, a diazonium salt, and a triazine compound comprising a halomethyl moiety. ### Claim 8 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the radiation-sensitive composition further comprises at least one boron salt compound comprising a boron anion represented by the formula (III): wherein R1, R2, R3 and R4 each independently represents an alkyl, aryl, alkenyl, alkynyl, cycloalkyl or heterocyclic group, or two or more of R1, R2, R3 and R4 are combined together to form a heterocyclic ring having the boron atom. ### Claim 9 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the radiation-sensitive composition further comprises a binder resin. ### Claim 10 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the image forming layer can be developed with an aqueous alkali solution. ### Claim 11 (depends on 1) The lithographic printing plate precursor according to claim 1, wherein the image forming layer can be developed with a fountain solution or a printing ink, or both a fountain solution and a printing ink. ### Claim 12 (depends on 1) A method for providing a lithographic printing plate, comprising: imagewise exposing the lithographic printing plate precursor of claim 1 to provide an exposed precursor, and developing the exposed precursor to provide a lithographic printing plate.