To improve the flame retardancy of acrylate coating and maintain its transparency， the phosphate monomer containing nitrogen and hydroxyl（PAEA） was synthesized based on phosphoric acid， epichlorohydrin and acrylamide as raw materials. Then a PAEA／EA coating was prepared by UV-curing method by means of combination of PAEA and epoxy acrylate（EA）. The effect of PAEA content on the mechanical properties， thermal stability， flame retardancy and thermal degradation of the coatings was investigated. The results showed the conversion of CC bond and the visible light transmittance of UV-curing coating decreased， but its thermal stability， limiting oxygen index， carbon residue rate and the high temperature stability increased with the increase of PAEA content. When the PAEA content was 60％， the comprehensive properties of the UV-curable EA coating were better， and its pencil hardness， impact strength， adhesion， limiting oxygen index， vertical combustion grade and carbon residue rate at 700 ℃ were 4 H， 50 kg·cm， 1 grade， 39.0， V-0 grade and 27.1％ respectively. The analysis of residual carbon morphology and real-time infrared spectrum of the coating showed that PAEA could enable the coating to carbonize and form the expanding structure， which improved the flame retardancy.
YANG Lei
. Preparation of Polyhydroxyphosphate / Acrylate Light-cured Flame Retardant Coating[J]. Paint & Coatings Industry, 2019
, 49(2)
: 14
-21
.
DOI: 10.12020/j.issn.0253-4312.2019.2.14
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