Synthesis and Applications of UV-Curable Epoxy Acrylate Modified by Isophorone Diisocyanate

Abstract: UV-curable coatings (UVCC) in recent years received more and more attention. UVCC has many advantages such as curing speed, environmentally friendly, energy conservation, painting a variety of substrates. Epoxy acrylate(EA)and Polyurethane acrylate (PUA) are currently the most widely used oligomers. EA has many advantages such as high hardness, good adhesion and fast curing speed and so on. PUA has good wear resistance and flexibility advantages. This issue based on two characteristics of oligomers, and hopes that modified epoxy acrylate by isocyanate to improve the high-viscosity and low-flexibility, in order to improve its performance and expand the scope of application.In this thesis, the modified tetrahydrocannabinol phthalate glycidyl acrylate was prepared from tetrahydrocannabinol phthalate glycidyl, acrylic acid and isophorone diisocyanate (IPDI) using two-stage polymerization. The UV-curing coating was prepared by the modified tetrahydrocannabinol phthalate glycidyl acrylate, reactive diluents and photo-initiator in different formulate, and the optimized formulate was obtained.The UV-curing oligomer was characterized by infrared analyzer (IR), viscometer and differential scanning calorimetry analyzer (DSC). The UV-curing film was characterized by thermo gravimetric analyzer (TGA), mechanical and tensile test. Some conclusions have been obtained: The conditions of synthesis of tetrahydrocannabinol phthalate glycidyl acrylate and modified by IPDI were identified. The result shows that the UV-curing film shows good flexibility, after modified by IPDI. The tensile strength of UV-curing film can reach 20 MPa. The elongation at break can reach 7%. The UV- curing coating with modified tetrahydrocannabinol phthalate glycidyl acrylate has good properties such as curing rate, high hardness and chemical resistant etc, besides improving the properties of flexibility…
Key words: UV-curing; isophorone diisocyanate; tetrahydrocannabinol phthalate glycidyl acrylate; flexibility

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