Resin composition for laser engraving, relief printing plate precursor for laser engraving and process for producing same, and relief printing plate and process for making same
A resin composition for laser engraving is provided that includes (Component A) a compound having a hydrolyzable silyl group and/or a silanol group, (Component B) a depolymerization catalyst and/or a depolymerization catalyst precursor, and (Component C) a depolymerizable binder polymer. There are also provided a relief printing plate precursor for laser engraving that includes a relief-forming layer containing the resin composition for laser engraving, a relief printing plate precursor for laser engraving having a crosslinked relief-forming layer formed by crosslinking by means of light and/or heat a relief-forming layer that includes the resin composition for laser engraving, a process for producing a relief printing plate precursor for laser engraving that includes a layer formation step of forming a relief-forming layer from the resin composition for laser engraving and a crosslinking step of crosslinking the relief-forming layer by light and/or heat to thus obtain a relief printing plate precursor having a crosslinked relief-forming layer, a process for making a relief printing plate that includes a layer formation step of forming a relief-forming layer from the resin composition for laser engraving, a crosslinking step of crosslinking the relief-forming layer by light and/or heat to thus obtain a relief printing plate precursor having a crosslinked relief-forming layer, and an engraving step of laser-engraving the relief printing plate precursor having a crosslinked relief-forming layer to thus form a relief layer, and a relief printing plate having a relief layer made by the process for making a relief printing plate.
1. A resin composition for laser engraving, comprising:
(Component A) a compound having a hydrolyzable silyl group and/or a silanol group;
(Component B) a depolymerization catalyst and/or a depolymerization catalyst precursor;
(Component C) a depolymerizable binder polymer, and
(Component E) a polymerizable compound,
wherein Component C is a polymer having at least a monomer unit represented by Formula (C-1) or a constituent unit represented by Formulae (C-2) to (C-4) below,
wherein R denotes an alkyl group having 1 to 20 carbons or an alkoxyalkyl group having 1 to 20 carbons, R 1 denotes an alkyl group having 1 to 30 carbons, the R 2 s independently denote an alkyl group having 1 to 10 carbons, and R 3 denotes an alkyl group having 1 to 30 carbons.
2. The resin composition for laser engraving according to claim 1 , wherein Component A is a compound having two or more hydrolyzable silyl groups.
3. The resin composition for laser engraving according to claim 1 , wherein the hydrolyzable silyl group is a hydrolyzable silyl group in which at least one of an alkoxy group and a halogen atom is directly bonded to the Si atom.
4. The resin composition for laser engraving according to claim 1 , wherein Component A is a compound further having in the molecule at least one type of atom or bond selected from the group consisting of a sulfur atom, an ester bond, a urethane bond, and an ether bond.
5. The resin composition for laser engraving according to claim 1 , wherein Component C is a polycyanoacrylate that forms a cyanoacrylate as a main component of a decomposition product when thermally decomposed or a polycarbonate that forms a cyclic carbonate as a main component of a decomposition product when thermally decomposed.
6. The resin composition for laser engraving according to claim 1 , wherein the depolymerization catalyst is a Lewis acid or an organic metal catalyst.
7. The resin composition for laser engraving according to claim 1 , wherein the depolymerization catalyst precursor is an acid generator or a base generator.
8. The resin composition for laser engraving according to claim 1 , wherein Component B is a Group 3 to 15 metal Lewis acid compound, or organic cationic compound.
9. The resin composition for laser engraving according to claim 1 , wherein the resin composition further comprises (Component D) a catalyst for promoting a hydrolysis reaction and/or condensation reaction of Component A.
10. The resin composition for laser engraving according to claim 1 , wherein the resin composition further comprises (Component F) a polymerization initiator.
11. The resin composition for laser engraving according to claim 1 , wherein the resin composition further comprises (Component G) a photothermal conversion agent that can absorb light having a wavelength of 700 to 1,300 nm.
12. A relief printing plate precursor for laser engraving, comprising a crosslinked relief-forming layer comprising the resin composition for laser engraving according to claim 1 .
13. A relief printing plate precursor for laser engraving, comprising a crosslinked relief-forming layer formed by crosslinking by means of light and/or heat a relief-forming layer comprising the resin composition for laser engraving according to claim 1 .
14. A process for producing a relief printing plate precursor for laser engraving, comprising:
a layer formation step of forming a relief-forming layer from the resin composition for laser engraving according to claim 1 ; and
a crosslinking step of crosslinking the relief-forming layer by light and/or heat to thus obtain a relief printing plate precursor having a crosslinked relief-forming layer.
15. The process for producing a relief printing plate precursor for laser engraving according to claim 14 , wherein the crosslinking step is a step of crosslinking the resin composition for laser engraving layer by means of heat to thus obtain a relief printing plate precursor having a relief-forming layer.
16. A process for making a relief printing plate, comprising:
a layer formation step of forming a relief-forming layer from the resin composition for laser engraving according to claim 1 ;
a crosslinking step of crosslinking the relief-forming layer by light and/or heat to thus obtain a relief printing plate precursor having a crosslinked relief-forming layer; and
an engraving step of laser-engraving the relief printing plate precursor having a crosslinked relief-forming layer to thus form a relief layer.
17. The resin composition for laser engraving according to claim 1 , wherein Component B is a compound selected from the group consisting of an aluminum compound, a zinc compound, a tin compound, a bis(phosphine)iminium compound, and an organic metal catalyst.
18. The resin composition for laser engraving according to claim 1 , wherein Component B is a compound selected from the group consisting of aluminum chloride, zinc chloride, tin chloride, and the compounds shown below:
19. The resin composition for laser engraving according to claim 1 , wherein Component B is a compound selected from the group consisting of the compounds shown below:
20. The resin composition for laser engraving according to claim 1 , wherein the resin composition further comprises (Component D) a catalyst for promoting a hydrolysis reaction and/or condensation reaction of Component A and (Component F) a polymerization initiator.
21. The resin composition for laser engraving according to claim 1 , wherein Component C is a polymer having at least a monomer unit represented by Formulae (C-1) below:
wherein R denotes an alkyl group having 1 to 20 carbons or an alkoxyalkyl group having 1 to 20 carbons.
22. The resin composition for laser engraving according to claim 1 , wherein Component C is a polymer having at least a constituent unit represented by Formula (C-2) or Formula (C-3) below:
wherein R 1 denotes an alkyl group having 1 to 30 carbons, and the R 2 s independently denote an alkyl group having 1 to 10 carbons.
23. The resin composition for laser engraving according to claim 1 , wherein Component C is a polymer having at least a constituent unit represented by Formula (C-4) below:
wherein R 3 denotes an alkyl group having 1 to 30 carbons.