The purpose of this work was to develop a new trispiperazido phosphate-based reactive diluent (diphosphate-piperazine hydroxyl acrylate [DPHA]) and used as a flame retardant with an epoxy acrylate (EA) in ultraviolet (UV)-curable wood coating.
The concentration of reactive diluent was varied from 0% to 20% in the UV-curable formulation with constant photoinitiator concentration. The effect of DPHA concentration on film properties was studied by differential scanning calorimetry and thermogravimetric analysis, gel content, water absorption and limiting oxygen index.
The results showed that the viscosity of the prepared formulation decreased by increasing reactive diluent (DPHA) concentration which leads to improving the coating efficiency. A high concentration of reactive diluent (DPHA) of the cured films shows good resistance against stain, mechanical and thermal properties, which results in an increased glass transition temperature (Tg) and cross-linking density of the films.
The new trispiperazido phosphate-based reactive diluent was used in wood coating formulation, which resulted in excellent flame-retardant properties with higher cross-linked density with good stain resistance. This material can provide a wide range of application for coating industries to produce a glossy finish.
The authors wish to thank the Department of Chemistry Pratap College Amalner, for providing them the laboratory for research work, and Mr Mustapha Kapdia (Director, Color Tech PVT. Ltd., Mahape Navi Mumbai) for providing the UV-curing facility. The authors also wish to thank the principal of B.S.S.P. Mandal’s Arts, Commerce & Science College Songir, Dhule for general support of their research work.
Mali, P.P., Pawar, N.S., Sonawane, N.S., Patil, V. and Patil, R. (2021), "UV curable flame retardant coating: a novel synthetic approach of trispiperazido phosphate based reactive diluent", Pigment & Resin Technology, Vol. 50 No. 3, pp. 271-283. https://doi.org/10.1108/PRT-06-2020-0058
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