Synthesis of Diphenyl Silanediol Modified Epoxy Resin and Its Salt Spray Resistance
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Hua Li, Zhonghua Yang, Hanhan Yang
In this research, modified epoxy resin was synthesized by using epoxy resin and Dihydroxydiphenylsilane (DHDPS) as raw materials and stannic caprylate (SnOct) as catalyst. The structure of the modified epoxy resin was characterized by fourier transform infrared (FTIR) spectrometer. Results showed that the modified epoxy resin had a hardness of 2H, adhesion of 0 class and good salt spray resistance under the condition of mass ratio of E-51:DHDPS, reaction temperature of 120°C and reaction time of 3 h. At the same time, effect of catalyst on the reaction of modified epoxy resin was studied, results showed that the structure of modified epoxy resin with SnOct as catalyst is similar to that of dibutyltin dilaurate (DBTDL), but SnOct is relatively environment-friendly, with strong catalytic activity and lower cost than that of DBTDL.
Epoxy resin, silicone, modification, salt tolerance resistance