# US 2013/0152809 A1 · Resin composition for laser engraving, flexographic printing plate precursor and process for producing same, and flexographic printing plate and process for making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152809 A1 - Document ID: US20130152809A1 - Status: Published application - Kind: A1 - Application number: 13/711,264 - Filed: 2012-12-11 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: FUJIFILM Corporation - Inventors: Kenta USHIJIMA - Web page: https://patentgrep.com/patent/US20130152809A1 ## CPC - B41N 1/06: for relief printing or intaglio printing - B41C 1/05: Heat-generating engraving heads, e.g. laser beam, electron beam - B41N 1/12: non-metallic other than stone {, e.g. printing plates or foils comprising inorganic materials in an organic matrix (B41N1/003, B41N1/006 take precedence)} - B41N 1/22: made of other substances - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - Y10S 977/773: Nanoparticle, i.e. structure having three dimensions of 100 nm or less - B41N: PRINTING PLATES OR FOILS (photosensitive material G03); MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM - B41C: PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES (photomechanical processes for producing printing surfaces G03F; photoelectrical processes for producing printing surfaces G03G) - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A resin composition for laser engraving that comprises (Component A) an epoxy resin; (Component B) an epoxy resin curing agent; and (Component C) a silica, Component B comprising an amine curing agent having an amine value of no greater than 0.01 eq/g or an acid anhydride curing agent having an acid anhydride value of no greater than 0.0050 eq/g. ## Claims ### Claim 1 A resin composition for laser engraving, comprising: (Component A) an epoxy resin; (Component B) an epoxy resin curing agent; and (Component C) a silica, Component B comprising an amine curing agent having an amine value of no greater than 0.01 eq/g or an acid anhydride curing agent having an acid anhydride value of no greater than 0.0050 eq/g. ### Claim 2 (depends on 1) The resin composition for laser engraving according to claim 1, wherein the amine curing agent is a diamine compound having a polyalkyleneoxy chain. ### Claim 3 (depends on 1) The resin composition for laser engraving according to claim 1, wherein the acid anhydride curing agent is an alkylsuccinic anhydride, an alkenylsuccinic anhydride, or an aliphatic dibasic acid polyanhydride. ### Claim 4 (depends on 2) The resin composition for laser engraving according to claim 2, wherein the acid anhydride curing agent is an alkylsuccinic anhydride, an alkenylsuccinic anhydride, or an aliphatic dibasic acid polyanhydride. ### Claim 5 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component B is a diamine represented by Formula (1), H2N—R1R2—OnR3—NH2 (1) wherein in Formula (1), R1 denotes a single bond or a divalent hydrocarbon group having 1 to 20 carbons, the R2s independently denote a divalent hydrocarbon group having 2 to 20 carbons, R3 denotes a divalent hydrocarbon group having 2 to 20 carbons, and n denotes an integer of 1 or greater, the diamine represented by Formula (1) having an amine value of no greater than 0.01 eq/g due to the structures of R1 to R3 and the number denoted by n. ### Claim 6 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component B is an alkenylsuccinic anhydride or an aliphatic dibasic acid polyanhydride. ### Claim 7 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component B is an anhydride represented by Formula (2), wherein in Formula (2), R4 denotes a hydrocarbon group having 8 to 30 carbons. ### Claim 8 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component B is an aliphatic dibasic acid polyanhydride represented by Formula (3), wherein in Formula (3), R5 denotes a divalent hydrocarbon group having 9 to 30 carbons and m denotes an integer of 2 or greater. ### Claim 9 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component B is a diamine represented by Formula (1), an anhydride represented by Formula (2), or an aliphatic dibasic acid polyanhydride represented by Formula (3), wherein in Formulae (1) to (3), R1 denotes a single bond or a divalent hydrocarbon group having 1 to 20 carbons, the R2s independently denote a divalent hydrocarbon group having 2 to 20 carbons, R3 denotes a divalent hydrocarbon group having 2 to 20 carbons, n denotes an integer of 1 or greater, the diamine represented by Formula (1) having an amine value of no greater than 0.01 eq/g due to the structures of R1 to R3 and the number denoted by n, R4 denotes a hydrocarbon group having 8 to 30 carbons, R5 denotes a divalent hydrocarbon group having 9 to 30 carbons, and m is an integer of 2 or greater. ### Claim 10 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component C has an average particle size of no greater than 100 nm. ### Claim 11 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component C has an average particle size of 3 to 60 nm. ### Claim 12 (depends on 1) The resin composition for laser engraving according to claim 1, wherein it further comprises (Component D) a photothermal conversion agent. ### Claim 13 (depends on 1) The resin composition for laser engraving according to claim 1, wherein Component A is a plastomer at 25° C. ### Claim 14 (depends on 1) The resin composition for laser engraving according to claim 1, wherein the content of Component B is higher than the content of Component A. ### Claim 15 (depends on 1) A flexographic printing plate precursor comprising a relief-forming layer comprising the resin composition for laser engraving according to claim 1. ### Claim 16 (depends on 1) A flexographic printing plate precursor comprising a crosslinked relief-forming layer formed by crosslinking by means of heat a relief-forming layer comprising the resin composition for laser engraving according to claim 1. ### Claim 17 (depends on 1) A process for producing a flexographic printing plate precursor, comprising: a layer formation step of forming a relief-forming layer comprising the resin composition for laser engraving according to claim 1; and a crosslinking step of crosslinking the relief-forming layer by means of heat to thus obtain a flexographic printing plate precursor comprising a crosslinked relief-forming layer. ### Claim 18 (depends on 16) A process for making a flexographic printing plate, comprising: an engraving step of laser-engraving the crosslinked relief-forming layer of the flexographic printing plate precursor according to claim 16. ### Claim 19 (depends on 18) A flexographic printing plate comprising a relief layer made by the process for making a flexographic printing plate according to claim 18.