水性聚氨酯防眩光涂料的制备与表征

摘要

In order to obtain ananti-glare coating with excellent properties, the nanoparticle emulsion with diverse shapes and sizes was prepared by controlling the contents of 2-[(2-aminoethyl)amino]ethanesulphonate(A95)and hydrazine hydrate.And then, the low-gloss, high-transmission waterborne polyurethane(WPU)emulsions were fabricatedbyspherical nanoparticlesscattering theory used to guide regulation.FT-IR, UV-Vis, grossmeters, SEM were employed to qualitatively characterize the synthesized WPU anti-glare coating.Meanwhile, the option of reaction condition and the effect of the A95 content on the average particles size and the anti-glare properties were examined.The results showed that when with R value of 1.9 and the A95content of 45%-60wt%, the synthesized WPU emulsion whose transmittancereaches about 88% has the bestanti-glare properties.The diameter of particles ranges from 577.6 to 585 nm and the gloss ranges from 20 to 23° with the incidence angle of 60°.%为了得到一种性能优良的防眩光涂料,通过控制后期乳化剪切时2-[(2-氨乙基)氨基]乙磺酸钠(A95)和水合肼的含量,制得不同形态和粒径大小的纳米颗粒乳液,用球形纳米颗粒的散射理论指导调控出低光泽度、高透光率的防眩光水性聚氨酯(WPU)乳液.采用红外、纳米激光粒度仪、紫外可光光度计、光泽度仪以及扫描电镜对合成的防眩光涂料进行了表征,并考察了反应条件的选择以及A95含量对WPU乳液中微球粒径和防眩光性能的影响.结果表明,当R值为1.9时,A95的含量在45%~60%(质量分数)时,乳液涂膜的防眩光性能优良,此时粒径在577.6~585 nm之间,60°入射角时的光泽度范围为20~23°,透光率可达到88%.