Abstract:

In this study fluorine chains were bonded with covalently in epoxy acrylate system via UV light. For this purpose, five different coating samples prepared. Bisphenol-A glycerolate diacrylate (epoxyacrylate) and 1,6-Hexanediol diacrylate were used as main coating solution. The weight ratio of Bisphenol-A glycerolate diacrylate and HDDA was calculated as 7/3. As a long fluorine chain, 1H,1H,2H,2H-perfluorodecyl acrylate (PFOA) was added into the main coating solution in the ratios of 0.25 wt  %, 0.50 wt %, 0.75 wt % and 1 wt  %. All prepared solutions were coated on aluminum plates by 75 µm by wire wound applicator and then cured via UV dryer. Physical properties of coatings were measured by test such as MEK rubbing test for solvent resistance, gloss 60o test for brightness, cross-cut test for adhesion property and pencil hardness test for scratch resistance.  Hydrophobicity was measured as static water contact angle test. The total surface energy was calculated by contact angle measurement software. In terms of mechanical properties, sheen impact test (for coating samples) and Shore - D hardness tests (for free film samples) were carried out. As a result of these tests, cross-cut adhesion and gloss 60o values decrease with the fluorine chains but favorable physical coating results were obtained. On the other hand, by the increasing within the content of the fluorine chains, Taber abrasion resistance and hydrophocity increases significantly but sheen impact resistance and Shore - D hardness values decreases slightly. In terms of cost and overall results, the most proper and multifunctional coating was seemed as 0.25 wt %.

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