高固含水性木器白色底漆的制备

介绍了高固含水性木器白色底漆的制备方法和性能指标,讨论了乳液、颜填料和颜料体积浓度对于涂膜性能影响。经检测,其具有高固含,高硬度、封闭性好、填充性好的特性,可以广泛应用于家装和家具领域。     

J-208厌氧型螺纹锁固密封胶的研制

介绍了J-208厌氧型螺纹锁固密封胶的组成和性能,该胶可用于多种金属表面包括纯铝、不锈钢、锌、镁等非活性表面试件的粘接,耐高低温、耐湿热、耐盐雾老化性能优异。     

有机-无机复合型建筑用封闭底漆的制备

采用硅溶胶、耐碱型苯丙乳液、云母粉、二氧化钛等颜填料制备有机-无机复合型建筑用非透明封闭底漆，以对比测试方法重点对其附着力、耐碱、抗渗透等性能进行验证，同时探讨了乳液、颜填料的选择因素以及硅溶胶对体系的作用和影响。     

有机硅渗透型底漆的制备及性能研究

试验中选用德国Wacker(瓦克)公司有机硅产品作为主要原材料,按照不同的稀释比例(或用量)配制了不同类型的有机硅底漆,测试了不同底漆对基材吸水率比、表面憎水效果、渗透深度、抗泛碱、抗盐析等性能的影响。     

环境友好型底胶的研究进展

在航空工业中的胶接领域,为了降低底胶中含有的大量挥发性有机溶剂（VOC）和铬酸盐,促进了环保型底胶的研发。对于水基底胶、无机底胶以及不合铬酸盐的底胶的胶接耐久性试验表明,一些新型的环保型底胶的性能与传统的溶剂型底胶处于同一水平甚至更好。新型底胶也同样能够提高复合材料的胶接强度和耐久性能,但应该寻找更环保、更简便的方法来获得耐久性的胶接。磷酸阳极化作为铝合金胶接中最好的表面处理方法本身具有很好的耐久性,使用耐久性较好胶粘剂获得耐久胶接是较好的方案之一。     

二步法双环戊二烯改性不饱和聚酯树脂的研究

采用双环戊二烯（80％）作为主要原料合成不饱和聚酯树脂,原料成本低、合成工艺路线简单、副反应少;合成的产品颜色浅、气干性好、综合性能佳。     

EIS evaluation of the filiform corrosion of aluminium coated by a cataphoretic paint

Filiform corrosion is mainly considered as a cosmetic attack and is undesirable in most applications. The initiation and propagation of the filaments are related to different parameters such as the presence of defects, the permeability of the coating to water and oxygen, the adherence of the paint system and the presence of salts.

The aim of this work is to study the behaviour of painted aluminium samples towards filiform corrosion or delamination. The 6082 Aluminium alloy was selected and the samples were covered with a cataphoretic epoxy primer without lead (PPG Industries France). Prior to the application of the electrocoat, the samples were pre-treated by a commercial Zr/Ti or chromate conversion treatment or simply etched with a commercial acid etching product.

Filiform corrosion was studied by the normalized test (ISO/DIS 4623): painted and scratched samples were inoculated in HCl and exposed in a constant humidity chamber at 40 °C and 82% RH for 3 weeks. After exposure the samples were subjected to a visual and optical microscopic examination.

Electrochemical impedance spectroscopy was used to study the sensitivity to filiform corrosion. The operating mode of this test is similar to the normalized one. The samples were scratched before inoculation for 1 h in HCl and then exposed to the humidity chamber for a maximum of 4 days. The samples were tested by EIS in an acidified 0.1 M Na₂SO₄ electrolyte solution. The resulting impedance spectra were analyzed with an appropriate equivalent electrical circuit which allows the evaluation of the exposed metallic surface area, directly related to the extent of filiform corrosion or delamination. Different parameters were varied: the exposure time in the humidity chamber; the immersion time in the electrolyte sulphate solution as well as its pH and the coating thickness.     

预涂金属卷材用水性环氧聚酯底漆的研制

将水性环氧树脂、丙烯酸改性饱和聚酯树脂、氨基树脂、插层改性累托石、各种颜填料和助剂按比例制成预涂金属卷材用水性环氧聚酯底漆。讨论了不同颜基比以及不同用量的环氧树脂、颜填料、插层改性累托石和偶联剂对漆膜性能的影响。获得了水性环氧聚酯底漆最佳配方:环氧树脂用量占树脂总固体分的15%,锶铬黄和插层改性累托石的用量分别占颜填料用量的30%和2%~3%,硅烷偶联剂1%。所得漆膜的附着力0级,硬度2H,T弯0,耐MEK擦试70次,抗流挂性和流平性良好。     

自乳化聚酯树脂汽车中涂漆的合成及性能研究

用逐步聚合法合成了聚酯树脂,用苯偏三酸酐(TMA)在聚酯分子链末端引入羧基以赋予其自乳化性能。讨论了原料,合成工艺条件,TMA用量对聚酯树脂及其水分散体性能的影响。采用GPC分析了封端前后的聚酯树脂的相对分子质量及其分布,以FTIR检测了聚酯树脂及其固化漆膜的结构与变化。结果表明,氮气保护下,当酯化、缩聚反应温度均为240℃,反应时间均为2h并保持反应体系的压力低于2kPa时,可获得高分子质量低酸值的聚酯树脂,在酸值(KOH)>15mg/g的封端树脂中加入三乙胺中和后可获得水分散性优良、储存稳定性高和表观粘度低的水分散体。用酸值(KOH)在10～20mg/g的封端聚酯树脂与六甲醇醚化的三聚氰胺甲醛树脂配制成水性涂料,其固化漆膜具有优良的综合性能,适于用作汽车中涂漆。     

水性环氧铁红底漆的研制

通过对水性环氧树脂实用性的选择,结合防锈颜料的作用机理,再配以各种助剂,成功地开发了水性环氧铁红底漆。漆膜具有较好的物理性能、耐水性、耐盐水性,施工适用期长达6 h,完全可以满足工业上的应用。漆膜具有优异的耐盐雾性,经1 500 h的盐雾试验后,漆膜无起泡、锈蚀、脱落现象。