Thermally crosslinkable resin composition for laser engraving, relief printing starting plate for laser engraving and process for producing the same, and relief printing plate and process for making same

摘要

A process for making a relief printing plate is provided, the process including a layer formation step of forming a relief-forming layer from a resin composition containing (Component A) a compound having a hydrolyzable silyl group and/or a silanol group and (Component B) a conjugated diene monomer unit-containing polymer, and at least either further containing (Component C) a vulcanizing agent having a sulfur atom or Component A above being a compound further having a sulfur atom, a crosslinking step of thermally crosslinking the relief-forming layer to thus obtain a relief printing starting plate having a crosslinked relief-forming layer, and an engraving step of laser-engraving the relief printing starting plate having a crosslinked relief-forming layer to thus form a relief layer.