Reactive microgel and photosensitive resin composition containing the reactive microgel for flexographic printing plate

摘要

A reactive microgel suitable for a photosensitive resin composition for a water-developable flexographic printing plate comprises microgel particles as a core, having attached to a surface thereof a compound having an epoxy group and an α, β-unsaturated double bond. The particles are obtainable by synthesizing from an acrylic monomer in an aqueous medium in the presence of an oil-soluble initiator and in the presence of a reactive polymer emulsifier which is an adduct of a neutralized product of an acrylic copolymer having a tertiary amino group with a compound having an epoxy group and an α, β-unsaturated double bond, and a nonionic emulsifier having an HLB of 12 to 16.