The weather resistance of waterborne polyurethane topcoat for wind turbine blades was studied.The effects of hydroxyl content of resin,type of color paste and waterborne light stabilizer on the accelerated aging resistance of the film in artificial climate were investigated.The results showed that:the coatings film's artificial accelerated aging resistance was better when selecting suitable resin and color paste,and addicting light stabilizer.Finally,the optimized formula had excellent weather resistance,which could meet the requirements of DNV GL.
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