Study on Synthesis and Properties of UV-Curable Polyurethane Acrylate
UV-curable nine functional polyurethane acrylate(PUA) prepolymer was synthesized with isophorone diisocyanate(IPDI),pentaerythritol tri-acrylate (PETA) and glycerol.Effects of temperature,time and catalyst on the synthesis of PUA prepolymer were discussed.Its structure was characterized by FI-IR.The UV-curable film properties were tested such as adhesion,glossiness,hardness,etc.The experimental results showed that the PUA prepolymer was synthesized stepwise,the first step was the reaction temperature 65 ℃,reaction time 2.5 hours,and the amount of catalyst 0.02％,the second step was reaction temperature 75 ℃,reaction time 2.5 hours.The film adhesion was 0,the glossiness was 97,the hardness was 5H,the properties were higher than commercial products.
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维普
