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http://dx.doi.org/10.12925/jkocs.2016.33.4.634

Synthesis and performance assessment of modified epoxy resins containing fatty acid  

Lee, Dong-Chan (Department of Chemical, Kwangwoon University)
Kim, Jin-Wook (Department of Chemical, Kwangwoon University)
Choi, Joong-So (Department of Chemical, Kwangwoon University)
Publication Information
Journal of the Korean Applied Science and Technology / v.33, no.4, 2016 , pp. 634-646 More about this Journal
Abstract
In this work, modified epoxy resins which were well melted in mild solvent were synthesized and solubility assessment was carried out for synthesized epoxy resins. Bisphenol-A type, phenol novolac type and ortho-cresol novolac type epoxy resins were used and fatty acid, dodecyl phenol (DP) and toluene diisocyanate (TDI) were added for synthesis of modified epoxy resins containing fatty acid (MEFA). Composition was epoxy resin/fatty acid = 1.0/0.5 and fatty acid/DP = 0.25/0.25 by equivalent weight and twelve MEFAs were synthesized according to epoxy resins. Viscosity and solubility were measured for twelve MEFAs. As a result, solubility of MEFA was excellent for mild solvent according to increasement of contents of benzene ring, glycidyl group and carbon number of alkyl group. And physical properties were measured for each coating of paints after preparing transparent paints of MEFA to melt well in mild solvent among twelve MEFAs. As a result, they showed an optimal performance on conditions of equivalent ratio of bisphenol-A type epoxy resin/fatty acid/DP/TDI; 1.0/0.25/0.25/0.5 and equivalent ratio of phenol novolac type epoxy resin/fatty acid/DP; 1.0/0.25/0.25 for drying time, adhesion, hardness, impact resistance and alkali resistance.
Keywords
Epoxy resin; Solvent solubility; Mild solvent soluble; Benzene ring; Epoxide group;
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