沥青路面水性聚氨酯丙烯酸热反射涂料制备  

Preparation of waterborne poly(urethane acrylic)heat⁃reflective coatings for asphalt pavement

作　　者：李宁利 王瑞 常紫攀 栗培龙[2] LI Ningli;WANG Rui;CHANG Zipan;LI Peilong(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Key Laboratory of Highway Structure and Materials,Chang’an University,Xi’an 710064,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]长安大学道路结构与材料交通行业重点实验室,西安710064

出　　处：《中国塑料》2024年第1期21-27,共7页China Plastics

摘　　要：以异佛尔酮二异氰酸酯(IPDI)、聚丙二醇(PPG)等原料制备水性聚氨酯(WPU),通过丙烯酸单体和交联剂改性WPU制得水性聚氨酯丙烯酸(WPUA)乳液。利用傅里叶变换红外光谱(FTIR)分析WPUA的官能团,利用铅笔硬度和百格划线法对WPUA膜的硬度、附着力进行测定,利用水接触角试验对WPUA膜的疏水性能进行测试;以降温值、黏度值、光泽度作为评价指标,借助正交试验设计确定WPUA热反射涂料的最佳配方;通过室内太阳辐射模拟装置以及室外太阳照射试验对WPUA热反射涂料的降温效果进行测试。结果表明,WPUA膜的附着力和硬度均得到提高,具有较好的疏水性;WPUA热反射涂料的最佳制备配方为固含量30%的WPUA乳液、16%的金红石型钛白粉、2%的石英砂和4%的中空玻璃微珠。WPUA热反射涂料室内外降温效果显著。Waterborne polyurethane(WPU)was prepared by using isophorone diisocyanate(IPDI),polypropylene gly‐col(PPG)as raw materials,and it was further modified by using an acrylic monomer and a crosslinking agent to prepare the waterborne poly(urethane acrylic acid)(WPUA)lotion.The functional groups of the as‐prepared WPUA were ana‐lyzed by Fourier‐transform infrared spectroscopy.The hardness and adhesion of the WPUA film was measured by using pencil hardness and hundred grid marking methods,respectively,and its hydrophobicity of WPUA film was tested by a water contact angle meter.The optimum formulation of the WPUA heat‐reflective coating was determined through or‐thogonal experimental design by taking cooling value,viscosity value,and gloss as evaluation indexes.The cooling ef‐fect of the WPUA heat‐reflective coating was investigated by using indoor solar radiation simulation devices and outdoor solar irradiation experiments.The results indicated that the WPUA film not only exhibited good hydrophobicity but also obtained an improvement in adhesion and hardness.The optimal preparation formulation of the WPUA heat reflective coating was determined to a WPUA lotion with 30 wt%solid content,16 wt%rutile titanium dioxide,2 wt%quartz sand,and 4%hollow glass beads.The WPUA heat‐reflective coating presents a significant cooling effect both indoors and outdoors.

关 键 词：道路工程 水性聚氨酯丙烯酸热反射涂料 红外光谱 正交试验 降温效果 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]