Importance

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Abstract

The present invention aims to provide a UV-curable composition having excellent printability, excellent UV reactivity in the presence of oxygen, and excellent adhesiveness at room temperature and high temperature. Provided is a UV-curable composition containing: a curing component containing a (meth)acrylate monomer and a crosslinking component; and a UV curing agent, the (meth)acrylate monomer including, in 100% by weight of the curing component, 50 to 85% by weight of a monomer that, in a form of a homopolymer, has a glass transition temperature of −70° C. to −30° C., a cured product being obtained by applying the composition to a substrate at a thickness of 150 μm and irradiating the composition, without sealing an upper surface of the applied composition, with UV light having a wavelength of 315 nm to 480 nm at an irradiance of 90 mW/cm² and a dose of 1,350 mJ/cm² in an atmospheric environment, the cured product having a gel fraction of 0.4 to 78%, a glass transition temperature of −35° C. to 10° C., a reaction percentage of 83% or higher, and a reaction progress percentage on a surface facing the atmosphere of 93% or higher relative to a surface facing the substrate.

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First Claim