Influence of isocyanate type of acrylated urethane oligomer and of additives on weathering of UV-cured films

The weathering of UV-cured films containing the isocyanate type of acrylated urethane oligomer, and the influence of different additives (HALS, UVA and TiO2), was investigated by various methods. The UV-cured film containing the acrylated aromatic urethane oligomer showed worse photodegradation than that containing the acrylated aliphatic urethane oligomer. In the case of the UV-cured films containing the acrylated aromatic urethane oligomer, those stabilized using both HALS and UVA showed the highest photostability.