Abstract: 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.

Key words: Active monomer containing P and N, Acrylic coating, Flame retardant, Thermostability

摘要： 为改善丙烯酸酯涂层阻燃性并保持其透明性，以磷酸、环氧氯丙烷及丙烯酰胺为原料合成了含氮和羟基的磷酸酯单体（PAEA），将其与环氧丙烯酸酯（EA）复配，UV固化制备PAEA／EA涂层。考察了PAEA添加量对涂层力学、热稳定性、阻燃及热降解等性能的影响。结果表明：随着PAEA含量增加，UV固化涂膜双键转化率、可见光透过率均下降，而热稳定性、极限氧指数、残炭率及高温热稳定性均增加。当PAEA的添加量为60％时，UV固化EA涂层的综合性能较佳，其硬度、耐冲击性、附着力、极限氧指数、垂直燃烧级别及700 ℃残炭率分别为4H、50 cm、1级、39.0、V-0级及27.1％。对涂层进行残炭形貌及实时红外分析表明，PAEA能促进涂层炭化并形成膨胀结构，从而达到改善阻燃的目的。

关键词: 含P、N活性单体, 丙烯酸酯涂层, 阻燃, 热稳定

CLC Number: 

• TB34