Castor oil-based water-based overspending polyurethane acrylate emulsion

Current work highlights the synthesis, characteristic and coating properties of castor oil (CO)-based water-based overspending polyurethane acrylates (WHPUA) emulsions for UV-cured coatings.
second generation CO-based overspending polyester (C 20) is synthesized by introducing renewable CO as a B 3 core and dehydroxymethylpropanic acid as an AB 2 monomer through a pseudo-pot condensation program. Three types of CO-based WHIPUS emulsions are prepared with different MA/IPDI-IH molar ratios by adding overspending C 20 and Malay acid anhydride (MA) and isocyanate-containing semi-addeds (IPDI-HEA) without adding any emulsion . The prepared lotion is further formulated into a UV-curable coating formula and exposed to medium pressure mercury lamps.
WHPUA emulsion as an environmentally friendly coating
the resulting UV-cured coating shows excellent bonding performance, excellent transparency and acceptable final dual-bond conversion. Due to the relatively low concentration of hydrophotic units and the large number of acrylic functional groups in water-based low-polymers, the resulting film has high crosslink density and low hydrophospheric properties, resulting in increased stretch strength, pencil hardness, water resistance and chemical resistance. These CO-based WHIPUS emulsions offer promising opportunities for environmentally friendly coatings due to their combination of renewable materials, water-based systems and UV curing technologies.
the study was published today: Journal of Coatings Technology and Research March 2019, Volume 16, Issue 2, pp 415-428.