| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 693107 | Progress in Organic Coatings | 2013 | 12 Pages |
In the present work fluorinated urethane-acrylate (FUA) monomer was firstly prepared based on isophorone diisocyanate (IPDI), 3,5-bis(perfluorobenzyl)oxy benzyl alcohol (FOH) and 2-hydroxyethyl methacrylate (HEMA) via in situ method. The obtained novel fluorinated urethane-acrylate was characterized by 1H NMR spectroscopy and Fourier Transform Infrared (FT-IR) spectroscopy. The UV-curable polyurethane-acrylate (UV-PUA) formulation was prepared with oligomers, polyurethane-acrylate (PUA) or epoxy acrylate (EA), monomers (FUA, HDDA and TPGDA) and photoinitiator, Darocur 1173. UV-curable clear coatings were applied on plexiglass and teflon substrates. The physical and mechanical properties of UV-cured coatings such as gel content, solvent resistance, hardness, gloss, flexibility and tensile tests were examined. Also thermal degradation behavior of coatings was also evaluated by thermogravimetric (TGA) analysis. Contact angle measurements of water and ethylene glycol on films of coatings have shown that the addition of fluorinated polyurethane-acrylate precursor to the system improved the water repellency and increased the contact angle from 72° to 104°.
► The high char yield may benefit the flame retardancy. ► Fluorinated monomer was introduced into urethane acrylate coating formulations. ► Perfluoropolymeric coatings confer to the surfaces low surface energy. ► Contact angle values of the films increased at least 10°. ► Cured films have higher char yield than unfluorinated analogs.
