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http://dx.doi.org/10.12925/jkocs.2016.33.4.615

Synthesis of Dodecyl Phenol Novolac Epoxy Resin and Physical Properties of Coatings  

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. 615-626 More about this Journal
Abstract
In the paper, mild solvent soluble alkyl group modified epoxy resins were prepared via a three-step method; (1) the condensation reaction of dodecyl phenol (DP) and formaldehyde, (2) the crosslinking reaction of dodecyl phnol novolac compound (DPC) and bisphenol A diglycidyl ether, (3) the dodecyl phenol novolac epoxy resins containing fatty acid (DPFA) was prepared by introducing fatty acid to DPC. Equivalent ratios of DP and formaldehyde were 1.25~1.333/1.0. Equivalent ratio of DPC and bisphenol A diglycidyl ether (YD-128) was 1.0/2.0. Reactivity, viscosity, molecular weight, solvent solubility, and physical properties of DPFA were investigated. The result show that as the number of aromatic ring of DPFA increased, viscosity increased and solvent solubility improved. When we test the properties of coatings by blending the synthesized DPFA with a white pigment, DPFAC-5 using triphenylphosphine (TPP) as a ring-open catalyst showed optical performance for drying time, adhesion, hardness, impact resistance, acid resistance and storage stability.
Keywords
Epoxy resin; Modifided epoxy resin; Mild solvent soluble epoxy resins; Phenol novolac; Dodecyl phenol;
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