Heat-treated (HT) wood is now a popular building material, which has been welcome by consumers due to its dark brown color, dimensional stability and bioresistance. This wood has many advantages. However, its color is susceptible to changes due to weathering. Therefore, for any outdoor application, protection of the wood with proper coatings is obligatory. In the current research work, olive leaf extract has been added to polyacrylate coating to study any resistance against natural or accelerated weathering. The polyacrylate polymer blended with additives of nanoparticles of TiO₂ or ZnO as well as 2-(2-hydroxyphenel)-benzotriazole (BTZ) type UV-absorber in combination with olive leaf extract or hindered amine light stabilizer (HALS) was investigated. For this purpose, HT wood samples were coated with a polyacrylate coating containing the mentioned additives. Afterwards, they were exposed to natural weathering for one year. The best samples, such as polyacrylate coated thermally treated wood with TiO₂-olive leaf extract 20%, BTZ-olive leaf extract 10% and 20% were selected after one year and exposed to accelerated weathering. The results showed olive leaf extract in combination with TiO₂, BTZ had less discoloration compared to other coatings during natural and accelerated weathering. Moreover, these compositions exhibited the best resistance to mold growth and development of cracks.

热处理（HT）木材现在是一种流行的建筑材料，由于其深棕色，尺寸稳定性和生物抗性而受到消费者的欢迎。这种木材有很多优点。但是，其颜色容易因风化而变化。因此，对于任何户外应用，必须使用适当的涂料保护木材。在当前的研究工作中，橄榄叶提取物已被添加到聚丙烯酸酯涂层中，以研究对自然或加速风化的任何抵抗力。与TiO ₂纳米粒子添加剂共混的聚丙烯酸酯聚合物研究了ZnO或ZnO以及2-（2-羟苯）-苯并三唑（BTZ）型紫外线吸收剂与橄榄叶提取物或受阻胺光稳定剂（HALS）的组合。为此，在HT木材样品上涂上含有上述添加剂的聚丙烯酸酯涂层。之后，他们被暴露在自然风化下一年。一年后选择最佳样品，例如用TiO _2-橄榄叶提取物20％，BTZ橄榄叶提取物10％和20％的聚丙烯酸酯涂覆的热处理木材，并使其暴露在加速风化下。结果显示橄榄叶提取物与TiO ₂结合，在自然和加速风化期间，BTZ的变色程度少于其他涂层。而且，这些组合物表现出对霉菌生长和裂纹发展的最佳抵抗力。