| 摘要 |
PROBLEM TO BE SOLVED: To provide a photocurable inkjet ink that has sufficient photocurability, excellent adhesion to a substrate, excellent optical transparency and heat resistance and forms a cured film and a microlens.SOLUTION: The photocurable inkjet ink comprises a (meth) acrylate (A) represented by formula (1) and a photopolymerization initiator (B). The photopolymerization initiator (B) has an absorbance of ≤0.1 in a wavelength region of ≥300 nm by an UV absorption spectrum measurement in an acetonitrile solution having 0.001 wt.% photopolymerization initiator concentration. The light transmittance of a film at a wavelength of 400 nm after heat-treatment at 70°C for 100 hours of the cured film (film thickness of 2.0-3.0 μm) obtained by the ink is ≥98%. |
