Abstract
Five different formulations prepared with epoxy diacrylate oligomer and trimethylol propane triacrylate (TMPTA) monomer of different proportions along with a photoinitiator (Irgacure-369) were taken to produce thin films under UV radiation. Various physical properties like pendulum hardness (PH), gel content, and macroscratch hardness (MSH) of these UV-cured films were studied. On the basis of better properties exhibited by the films, three of the formulations were chosen for base coat and the remaining for top coat on the partex surface. Two formulations, of which one for base coat and the other for top coat, were applied on the partex and then cured by UV radiation. Thereafter, PH, gloss, MSH, abrasion resistance, adhesion, etc., properties of the UV-cured partex surfaces were investigated. The best coating obtained for the base coat is with 48% TMPTA while that for the top coat is 82% TMPTA. The simulated weathering test of the UV-cured partex surface made with this coating was also performed as an extension of further studies of PH, gloss, adhesion, and MSH; this also shows better performance against the weathering treatment.
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