Based on the film forming mechanism of waterborne two-component polyurethane coatings,the blister panel effect of coatings was analyzed.Waterborne polyurethane dispersions were evaluated and tested.The influence of wet film thickness,dry time at room temperature and volatile amount of solvent on the effect and defect of the panel was tested and discussed.A waterborne two-component polyurethane bright wood varnish was prepared through formula design and optimization and its comprehensive properties tested.
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