共查询到19条相似文献,搜索用时 171 毫秒
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使用三聚氰胺聚磷酸盐(MPP)-双季戊四醇(DPER)发泡体系(M-D体系)取代聚磷酸铵(APP)-三聚氰胺(MEL)-季戊四醇(PER)体系(A-M-P体系)制备了水性钢构防火涂料。讨论了MPP/DPER质量比、基料用量、基料配比对涂层初期耐火性及耐浸出性能的影响,对比了M-D体系水性防火涂料与A-M-P体系水性及溶剂型防火涂料的耐浸出性及浸泡后耐火性能可持续性。结果表明:M-D体系展现出与聚合物较好的相容性和较强的疏水性,由其所制备的涂层具有较好的抗溶失性,长期浸泡后涂层仍具备优异的耐火性能可持续性,适宜在户外或较为潮湿的地下结构和隧道等有长期耐水需求的钢结构保护场合中使用。 相似文献
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分析了不同基料树脂对超薄型钢结构防火涂料性能如发泡能力、涂层的质量损失百分比、发泡层的硬度和致密性的影响,介绍了不同基料树脂的优缺点,指出选择合适的成膜物质,对提高超薄型钢结构防火涂料的性能是至关重要的环节。 相似文献
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水性超薄型钢结构防火涂料的研制与性能研究 总被引:2,自引:0,他引:2
以丙烯酸类乳液为成膜物质,以季戊四醇、三聚氰胺、聚磷酸铵与无机增强填料作为阻燃体系,制备了水性超薄型钢结构防火涂料.采用模拟大板燃烧法对防火涂料的耐火性能进行了研究,系统考察了乳液种类、颜基比以及无机填料对防火性能的影响,确定了无机填料的最佳用量.研究结果表明:以硅丙乳液作为基料树脂,当体系颜基比为3.5以及珍珠岩的添加量为7%时,防火涂料的耐火时间能达到128.7 min;珍珠岩与炭质层的生成具有明显的协同效应,这大大提高了炭质层的强度,而且还表现出显著的隔热效果. 相似文献
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Legal restrictions have impelled the replacement of solvent-borne resins and of toxic chromates and lead-bearing pigments in the elaboration of paints. Water-based anticorrosive paints have come a long way to improve their efficiency but their behaviour is said to be poorer than that of solvent-based paints. Nevertheless, recent advances in water-borne technologies have now resulted in improved resin systems that may be employed to produce heavy-duty coatings.
The objective of this paper is to formulate high performance water-borne paints pigmented with non-toxic phosphate inhibitors. The anticorrosive properties of the paints were evaluated by accelerated tests (salt spray and humidity cabinets) and electrochemical tests (electrochemical impedance spectroscopy, EIS). The anticorrosive properties of the pigments were also evaluated by electrochemical tests.
It was found that it is possible to formulate high performance anticorrosive paints by selecting adequate water-borne resins and ecological pigments. 相似文献
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钢结构用超薄型水性环氧防火防腐涂料的研制 总被引:2,自引:0,他引:2
以液体环氧树脂为基料树脂,以水性胺为固化剂;以聚磷酸铵、三聚氰胺、季戊四醇、氯化石蜡为膨胀阻燃体系;以纳米TiO2、可膨胀石墨为增效剂;以复合铁钛粉为防锈颜料,制备了钢结构用超薄型防火防腐涂料。当环氧涂层的交联度达到理论交联度的50%~70%时,涂层既有优良的防火隔热性能,又有优良的防腐蚀性及机械性能。 相似文献
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Increased awareness of the environmental impact of solvent-based anticorrosive marine coatings has urged to predict long-term performance of a coating in order to make dry-docking less frequent. Each coating system was composed by three layers: topcoat, \ and primer. All samples were exposed to four different standard artificial weathering tests: a neutral salt spray test (NSS ISO 9227) and three cycles (QUV ASTM G53, ASTM D5894 and ISO 20340). Besides, the same samples were exposed to a natural weathering during 4 years in three different locations: Pipady (south of France), Kure Beach (North Caroline, USA) and Bandol (south of France). This research project focused exclusively on the degradation of the basecoat and primer by FTIR spectroscopy, PyGC/MS and dynamical mechanical analysis. Basecoat and primer binders formulated with dibutylphtalate as a plasticizer were found to strongly evolve during artificial cycle tests. An extensive diffusion of plasticizer was observed with a rise in Tg of the epoxy binder as high as 40 °C. The impact of these physico-chemical changes on the corrosion protection properties of the whole system were discussed based on electrochemical impedance spectroscopy (EIS) in 3 wt% NaCl solution, SEM observations, pull-off test and measurements of delaminated areas. 相似文献