A new type of plant oil-based ultraviolet (UV)-curable oligomer has been synthesized and used in coating formulation. The trimethylolpropane (TMP) oleate was epoxidized and reacted with acrylic acid via ring-opened reaction to produce acrylated TMP oleate. The dwindling acid value and oxirane oxygen content indicated successful acrylation. The degree of acrylation obtained from the acrylated TMP oleate was 50.21%. The acrylated TMP oleate underwent UV-initiated polymerization with monomer, trimethylolpropane triacrylate (TMPTA) and a photoinitiator, 1-hydroxycyclohexyl phenyl ketone (Irgacure 184) in various ratio which resulted in radiation cured coating with acceptable properties, high crosslink density from the gel content and Konig pendulum hardness. The synthesized compound is a promising candidate to increase the biobased content of the existing UV curable compounds.
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Cheong et al. (2024) studied this question.
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