UV-curable components

Abstract

The object of this invention is to provide a UV-curable composition with excellent printability, UV reactivity in the presence of oxygen, and adhesion at both room temperature and high temperature. The UV-curable composition of this invention contains: a curing component comprising (meth)acrylate monomers and crosslinking components, and a UV curing agent. The (meth)acrylate monomers comprise 50-85% by weight of a homopolymer with a glass transition temperature of -70°C to -30°C per 100% by weight of the curing component. When the composition is coated onto a substrate with a thickness of 150 μm without sealing the coating surface, and irradiated with UV light at an atmospheric irradiance of 90 mW / cm² and an irradiation dose of 1350 mJ / cm² with a wavelength of 315 nm to 480 nm, the resulting cured product has a gel fraction of 0.4-78%, a glass transition temperature of -35°C to 10°C, a reaction rate of 83% or higher, and a reaction rate of 93% or higher on the atmospheric side relative to the substrate side. none

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