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Synthesis and properties of phosphate-based diacrylate reactive diluent applied to UV-curable flame-retardant wood coating

Abstract

The diacrylate reactive diluent was synthesized by reacting glycidyl methacrylate, piperazine, and cyclic ethylene chlorophosphate. The synthesized reactive diluent was utilized to formulate UV-curable wood coating. The weight fractions of reactive diluent were varied from 0 to 25% in coating formulation with constant photoinitiator concentration. The molecular structure of reactive flame retardant was evaluated by FTIR, mass spectroscopy, 31PNMR, and 1HNMR spectral analysis. The flame retardant behaviors of the cured film were evaluated from limiting oxygen index and UL-94 vertical burning test. Thermal stability was estimated from thermogravimetric analysis and differential scanning calorimetry. The effects of varying concentrations of reactive diluent on the viscosity of the formulation along with optical, mechanical, and chemical resistance properties of coatings were evaluated. The gel content, water absorption behavior, and stain resistance of coatings were also studied.

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Acknowledgments

The authors immensely like to thank UGC SAP-Green Tech Grant for providing the financial support and Institute of chemical technology for allowing us to do our research and Mr. Sunil S. Daddikar (Director, Unique UV & Light PVT. Ltd., Vasai. Mumbai) for providing UV curing facility.

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Correspondence to Ramanand Jagtap.

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Lokhande, G., Chambhare, S. & Jagtap, R. Synthesis and properties of phosphate-based diacrylate reactive diluent applied to UV-curable flame-retardant wood coating. J Coat Technol Res 14, 255–266 (2017). https://doi.org/10.1007/s11998-016-9849-6

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  • DOI: https://doi.org/10.1007/s11998-016-9849-6

Keywords

  • Phosphorus-based flame retardant
  • UV-curable coating