Effect of nano-B4C addition amount on viscosity and solid content of modified waterborne polyurethane coatings
Release time：2021/03/04 Author：
Meiqi
B4C content influence on modification of WPU viscosity as shown in figure 2 as nano B4C content gradually increased, 1% ~ 3%, the modification of WPU coating viscosity is on the decline, it may be that the B4C in the process of gradually add, high hardness and chemical performance is stable, the solid content of coatings increased resulting in a decline in the viscosity of the coating is 3% ~ 5%, the viscosity of WPU modified gradually smooth, probably because as B4C continues to add, its produce the phenomenon of reunion in the WPU coating, not fully dispersed in WPU coating, modified WPU coating viscosity into balanceWhen the B4C content is 3%, the modified coating viscosity of 573 mpa s. at the same time, along with B4C, with the increase of adding amount of modified water-borne coating the solid content of linear growth, the solid content of waterborne polyurethane coating increased from 42.1% to 46.7%, and that adding B4C can increase the solid content of waterborne polyurethane coating, the increase of the modified waterborne polyurethane coating solids can reduce the curing time of waterborne polyurethane coating, to improve the efficiency of its curing.
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