Study on the effect of reactive diluents on exothermic UV curable and coating films properties

Abstract The influence of reactive diluents on the exothermic effect in the curing of ultraviolet coatings were examined, and their effects on the adhesion, gloss, anti-friction, flexibility, and water contact angle of ultraviolet coating films were analyzed in depth. The results showed that the screening of suitable reactive diluents was beneficial to balance the multiple properties of ultraviolet coatings. Among the reactive diluents examined, the samples prepared with monofunctional reactive diluents had higher curing exothermicity. The Ultraviolet coating films prepared with LuCure645 and HPMA had better adhesion. The ultraviolet-cured films prepared with monofunctional reactive diluents all had better flexibility, while the ultraviolet-cured films prepared with bifunctional reactive diluents had better anti-friction.