Preparation and Corrosion Resistance of Modified Temperature Resistant Silicone Coatings

Abstract

For improving the anti-corrosion performance of methyl phenyl silicone resin coatings, the methods of introducing other organic resins to increase the degree of cross-linking and using nanoparticles to fill internal defects in the coating were employed to improve corrosion resistance. Specially, the silanized epoxy resin was prepared by pre-polymerization of APTES amino silane with epoxy resin E51 or phenolic epoxy resin F51, and then physically mixed with methyl phenyl silicone resin to realize the modification of the organic silicon resin, in which nanometer Mg-Al LDHs or nanometer TiO2/SiO2 were added as fillers. Results showed that the use of silanized epoxy resin and silanized phenolic epoxy resin to modify methyl phenyl silicone resin reduced the heat resistance by 11.4% and 5.6%, respectively. The adhesion increased by 16.3% and 25.3%, respectively, and their corrosion resistance was improved by more than 40%. Besides, the addition of 1.6% nanometer TiO2/SiO2 filler enhanced the heat resistance of the silicone resin coating by 2.8% and the corrosion resistance by about 30%. The addition of 15% Mg-Al LDHs filler reduced the heat resistance of the silicone coating by 16.6% and increased the corrosion resistance by about 20%.

Keywords

• methyl phenyl silicone resin|silanized epoxy resin|modified silicone coating|high temperature resistance and anti-corrosion|nanoparticle filler