Abstract
In this paper, waterborne ultraviolet (UV)-curing wood coatings were modified by nano MgCO3 puree, and prepared by optimizing the process parameters. The mechanical properties (hardness, adhesion and resistance impact strength) and gloss of waterborne UV-curing wood coatings modified by nano MgCO3 puree were tested. It was found that the mechanical properties of coatings increased when nano MgCO3 content increased from 0 to 3.0%. Waterborne UV-curing wood coatings had good hardness, adhesion and impact strength when the nano MgCO3 content was 3%-4%. The hardness was 3H, the adhesion was grade 1, and impact strength was 40 kg∙cm. However, when nano MgCO3 content was higher than 4%, the mechanical properties of coatings decreased. As the nano MgCO3 content gradually increasing, the gloss of waterborne UV-curing wood coatings modified by nano MgCO3 puree decreased. When the nano MgCO3 content was 4.0%, the gloss of coating was 33%. When the nano MgCO3 content exceeded 4.0%, the gloss of waterborne UV-curing wood coatings displayed matte.
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