Boron-containing UV-curable oligomer-based linseed oil as flame-retardant coatings: synthesis and characterization

Abstract

A boron-containing UV-curable oligomer was derived from linseed oil, phenylboronic acid and glycidyl methacrylate to use in flame-retardant coating applications. The synthesized UV-curable oligomer was characterized for its structural and physicochemical properties by means of Fourier transform infrared (FTIR), 1 H and 11 B-nuclear magnetic resonance (NMR) spectroscopy techniques. The boron-containing UV-curable oligomer (BELO) was added to a conventional polyurethane acrylate (PUA) at varying concentrations ranging from 10 to 40 wt% in the presence of a photoinitiator and a reactive diluent. LOI and UL-94 tests were performed to understand the flame-retardancy behavior of the synthesized BELO oligomer, and the results revealed that the flame retardancy of UV-curable coatings enhanced as the percentage of BELO oligomer in the coating formulations increased. The glass transition temperature (T g ) and thermal stability of cured coatings were analyzed by differential scanning calorimetry and thermogravimetric analysis, respectively. The TGA analysis showed that char yield at 600 °C increased by increasing the BELO oligomer content. The mechanical properties, and stain, solvent, and chemical resistance and thermal behavior of the coatings were investigated. Incorporation of BELO into the PUA coating formulations and the comparison of the properties of BELO-incorporated PUA coatings with those of the conventional PUA coating exhibited interesting results.

Preparation and Properties of Plant-Oil-Based Epoxy Acrylate-Like Resins for UV-Curable Coatings

“…However, most of the raw materials for UV-curable coatings currently available in the global market are from non-renewable, environmentally polluting petroleum-based fossil resources. Therefore, developing UV-curable coatings by introducing biorenewable components such as carbohydrates, plant oils, and rosins related to sustainability and environmental protection is required to match sustainable development strategies [ 8 , 9 ].…”

Vat Photopolymerization 3D-Printing of Dynamic Thiol-Acrylate Photopolymers Using Bio-Derived Building Blocks

“…Along with recyclability and repairability, research in 3D-printing is also geared towards the synthesis of functional and bio-based monomers derived from plant/vegetable oils, rosin, or carbohydrates as feedstocks [30][31][32][33][34]. Plant and vegetable oils have unsaturated triglyceride structures and are abundantly available, biodegradable, and environmentally friendly [30,[35][36][37][38][39][40][41].…”