Epoxy Modified with TDI to Cure Active Hydrogen Groups: Synthesis and Characterization

Abstract:

Study on isocyanate-terminated prepolymer prepared by the reaction of toluene diisocyanate (TDI) with the hydroxy of epoxy resin. By the characteristics that isocyanate-group reacts with active hydrogen groups easily, the prepolymer could be as a curing agent for substance with active hydrogen groups like coal tar. IR spectra showed that the modification was achieved by cross-linking the hydroxy of epoxy resin and the isocyanate of TDI, but epoxy group had no change. In self-made coal tar coatings, the remaining isocyanate-groups played a curing agent role linking coal tar and epoxy resin. Tafel test showed the films with prepolymer was more corrosion resistance, combined the characteristics of the epoxy resin and coal tar.

• Periodical: Advanced Materials Research (Volume 531)
• Pages: 511-515
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.531.511
• Online since: June 2012
• Authors: Zhi Gang Liu, Jing Jing Xu, Yan Lan Qin, Ju Sheng Zhang, Qian Lan Rao
• Keywords: Coal Tar, Corrosion Resistance, Curing Agent, Diisocyanate, Epoxy Resin (ER)

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