화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.15, No.3, 381-387, May, 2009
DOI10.1016/j.jiec.2008.11.002  Export Citation
Effect of water drying conditions on the surface property and morphology of waterborne UV-curable coatings for engineered flooring
Hyeon-Deuk Hwang1, Je-Ik Moon1, Jae-Hoon Choi1, Hyun-Joong Kim1, 2, †, Shin Do Kim3, and Jin Chul Park4
  • 1Lab. of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, South Korea
  • 2Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, South Korea
  • 3School of Environmental Engineering and Science, University of Seoul, Seoul 130-743, South Korea
  • 4School of Architecture & Building Science, Chung-Ang University, Seoul 156-756, South Korea
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UV-curable coatings are widely used on wooden materials such as flooring and furniture, because they have excellent properties, including high hardness, gloss, mar and chemical resistance, and are also environmental friendly, containing no solvents. Recently, waterborne UV-curable coatings have been studied as a viable alternative, since solvents are added to spray applications to lower viscosity. We investigated the effects of water drying conditions on the surface properties and morphology of waterborne UV-curable coatings at the flash-off step. Temperature conditions studied were 22 ℃, 50 ℃, and 80 ℃, with various drying times. We evaluated surface properties such as pendulum hardness, pencil hardness, and adhesion strength. Also observed was surface morphology, comparing surface properties using optical microscopy after drying and UV-curing. Insufficient drying caused cracking, peeling and blistering at the surface of a cured coating. Sufficient drying was very important for the best application and ideal surface morphology of waterborne UV-curable coatings.
Keywords:UV-curing;Waterborne;Flash-off;Morphology;Hardness;Adhesion;Surface
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