[Introduction]Traditional solvent-based automotive paints have high VOC(volatile organic compounds)content,while the existing automotive paints usually have insufficient resistance to ultraviolet aging and corrosion.[Method]A kind of waterborne automotive paint with high gloss and anticorrosion performance was prepared by using silicone-modified waterborne epoxy resin as binder with some auxiliary materials such as curing agent,functional pigment and filler,and antirust agent.The effects of the amounts of binder and auxiliary materials on various properties of the paint were discussed.[Result]The paint prepared with the optimized composition had the following properties:surface drying time 45 min,0-grade adhesion,pencil hardness HB,neutral salt spray corrosion resistance more than 4 000 hours,light retention rate of 87%after 3 000 hours of aging test,water resistance 240 hours,and VOC content 56.5 g/L.[Conclusion]The coating meets the requirements of the standard HG/T 4570-2013 for waterborne automotive coatings.
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