Properties of UV-Curable Bisphenol-A Glycerolate Diacrylate Coatings Containing 1H,1H,2H,2H-Perfluorodecyl Acrylate Monomer

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 (epoxy acrylate) and 1,6-Hexanediol diacrylate were used as the main coating solution. The weight ratio of Bisphenol-A glycerolate diacrylate and HDDA was determined as 7/3. As a long fluorine chain, 1H,1H,2H,2Hperfluorodecyl 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 tests 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. By examining the results of all these tests; cross-cut adhesion and gloss 60o values decrease with the fluorine
content. On the other hand, by the increasing within the content of the fluorine chains, Taber abrasion resistance and hydrophobicity increase significantly but sheen impact resistance and Shore - D hardness values decrease slightly. In terms of cost and overall results, the most proper and multifunctional coating seemed at 0.25 wt %.

Keywords

• Epoxy acrylate
• 1H
• 2H
• 2H-perfluorodecyl acrylate
• UV-curable coatings
• hydrophobic surface

1H, 1H, 2H, 2H-Perflorodesil Akrilat Monomeri İçeren UV ile Sertleşebilen Bisfenol – A Gliserolat Diakrilat Kaplamalarının Özellikleri

Abstract

Bu çalışmada flor zincirleri, UV ışığı ile sertleşebilen epoksi akrilat sistemine kovalent olarak bağlandı. Bu amaçla beş farklı kaplama örneği hazırlanmıştır. Ana kaplama çözeltisi olarak Bisfenol-A gliserolat diakrilat (epoksiakrilat) ve 1,6-Heksandiol diakrilat kullanıldı. Bisfenol-A gliserolat diakrilat ve HDDA'nın ağırlık oranı 7/3 olarak belirlendi. Uzun bir flor zinciri olarak 1H, 1H, 2H, 2H-perflorodesil akrilat (PFOA) ağırlıkça % 0.25, % 0.50, % 0.75 ve % 1 oranlarında ana kaplama çözeltisi içine ilave edildi. Hazırlanan tüm çözeltiler, alüminyum plakalar üzerinde 75 µm tel sargılı aplikatör ile kaplandı ve daha sonra UV kurutucu ile sertleştirildi. Kaplamaların fiziksel özellikleri; solvent direnci MEK ovma testiyle, parlaklık 60o parlaklık ölçüm testiyle, çizilme direnci kalem sertliği testiyle, yapışma özelliği çapraz-kesme testiyle yapılmıştır. Yüzeylerin hidrofob özelliği statik su temas açısı testiyle ölçüldü. Toplam yüzey enerjisi temas açısı ölçüm yazılımı ile hesaplandı. Mekanik özellikler açısından, Sheen darbe testi (kaplama numuneleri için) ve Shore-D sertlik testleri (serbest film numuneleri için) yapıldı. Bu testlerin sonuçları ele alındığında, çapraz kesme-yapışma ve parlaklık 60o değerleri flor içeriğinin artması ile azaldığı gözlemlendi. Diğer taraftan Taber aşınma direnci ve hidrofobisite önemli ölçüde artmaktadır, ancak darbelere karşı dayanıklılık ve Shore-D sertlik değerleri azalmıştır. Maliyet ve genel sonuçlar açışından bakıldığında en uygun ve çok fonksiyonlu kaplama % 0.25 olduğu bulunmuştur.

Keywords

• Epoksiakrilat
• 1H
• 2H
• 2H-perflorodesil akrilat
• UV ile sertleşebilen kaplamalar
• hidrofobik yüzey

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