Synthesis of Hydroxyl Polyurethane Acrylate Emulsion and Its Application in Waterborne Two-component Wood Coatings
Using poly-neopentylene adipate glycol(PNA-1000),hexamethylene diisocyanate(HDI),polyether diol containing sulfonate(SPPG),n-butanol(BO)and 4-hydroxybutyl acrylate(4-HBA)as raw materials,vinyl terminated polyurethane ionomer was synthesized,then a hydroxyl polyurethane acrylate emulsion was prepared via pre-emulsification seed emulsion polymerization,using methyl methacrylate(MMA),n-butyl acrylate(BA),hydroxyethyl acrylate(HEA)and acrylic acid(AA)as monomers.The effects of the type of capping monomer,the weight ratio of polyurethane and hydroxyl content on emulsion stability and performance were studied.The results indicate that when BO and 4-HBA were used as capping monomers,the weight ratio of polyurethane was 30%,and the hydroxyl content was 1.0%(based on solid content),the emulsion polymerization had the best stability and excellent performance.The two-component waterborne wood coatings prepared with it have good adhesion,good block resistance,and excellent water and chemical resistance.
万方数据
维普
