Study on Appearance Performance of Defoamer for Mass Production of Waterborne Coatings
In the mass industrial production,the degree of dispersion of defoamer directly determines the appearance smoothness and physical and chemical properties of water-borne coatings.Based on the waterborne acrylic anticorrosive coatings,the waterborne coatings were produced industrially,and their wetting parallel flow behavior and defoaming system were studied systematically.The compounding mode,feeding speed,dispersing speed and dispersing time of defoamer were investigated respectively,and the appearance and resistance of coating film were taken as evaluation indexes.The results show that the appearance defects caused by industrial production of waterborne steel structural coatings can be solved,and the qualified rate of finished products in batch production can be improved obviously.The properties of the coating are consistent with those of the products produced in small batch,and meet the requirements of water-based anticorrosive coatings for steel structures HG/T 5176-2017.
万方数据
维普
