无溶剂纳米SiO2改性环氧涂料的制备及性能评价OA

In order to improve the comprehensive performance of epoxy coatings,solvent-free nano-SiO2 was prepared using colloidal SiO2 as raw material and added as a modifier to epoxy resin E51.Then,a solvent-free nano-SiO2 modified epoxy coating was prepared by combining mixed amine curing agent DPM-1,diluent C-12,and epoxy promoter DMP-30.The preparation conditions of the coating were optimized indoors,and its basic performance and aging resistance were evaluated.The results showed that the optimal preparation conditions for solvent-free nano-SiO2 modified epoxy coatings were as follows:the particle size of nano-SiO2 was 120 nm,and its dosage was 3％,the dosage of diluent aliphatic glycidyl ether C-12 was 35％,and the dosage of epoxy promoter DMP-30 was 3％.At this time,the viscosity of the coating was moderate,the bending performance was excellent,and the adhesion of the coating was high.The solvent-free nano SiO2 modified epoxy coating does not contain volatile organic compounds,and all basic performance parameters can meet the requirements of the chemical industry standard HG/T 5176-2017.The solvent-free nano-SiO2 modified epoxy coating has strong aging resistance.Even under salt spray aging or artificial climate aging conditions for 1000 hours,the adhesion of the coating was still relatively high,which can meet the comprehensive performance requirements of anti-corrosion coatings for pipeline surfaces in the dry and hot environment of the western region.