UV curable flame retardant coating: a novel synthetic approach of trispiperazido phosphate based reactive diluent

Abstract

Purpose 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. Design/methodology/approach 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. Findings 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. Originality/value 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.

“UV-curing of novel tri-functional melamine-phosphate oligomer: An effect of coating with polyurethane acrylate toward mechanical, thermal, and flame retardant properties”

“…The amorphous nature in cured PU-MPTO was due to a hyperbranched and cross-linking polymer network. 42,43 This indicates that PU-MPTO has been chemically incorporated into the hybrid materials and formed a cross-linked network between PU and MPTO consistent with the results of FTIR analysis.…”

Nano-dispersible azo pigments from lignin: a new synthetic approach and epoxy-polyamine composite coating

“…The composite coatings have moderate resistivity towards the chemicals while exposed to it for seven days (Figure 10) (Patil et al , 2014; Mali et al , 2020). Aniline-azo-lignin and m-nitroaniline-azo-lignin pigment coatings had excellent glossy surface as compared to p-nitroaniline-azo-lignin and p-anisidine-azo-lignin pigment coatings.…”

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

“…While they can be improved with additives, a popular approach found in the latest literature to enhance the properties of film-forming organic coatings was to use strategic reactives to change key properties of the resin itself. Different fire-retardant coatings were reported using phosphorus containing monomers or reactive diluents [30][31][32][33]. Lokhande et al used glycidyl methacrylate, piperazine, and cyclic ethylene chlorophosphite to develop a diacrylate reactive diluent yielding UV-cured coatings with increased thermal resistance, hardness, hydrophobicity and stain resistance [34].…”

“…Organic coatings were particularly studied for this subject, either by the inclusion of phosphorous reactives [30][31][32][33][34][35] or additives [63,85,89,[97][98][99][100]. Different mechanisms were tested to promote the fire safety of wood such as an increased char formation, a delayed time to ignition, an increased limiting of the oxygen index (LOI), and a lower smoke release.…”