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简要分析了超薄型钢结构防火涂料在钢结构防火中的重要作用,介绍了其组成及特点,并阐述了超薄型钢结构防火涂料的研究进展,最后对超薄型防火涂料的发展进行了展望。 相似文献
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选用丙烯酸乳液制备了一种新型的水性超薄防火涂料。首先,用差示扫描量热法和热重分析方法,对水性超薄型防火涂料热分解过程中的热量变化和质量变化进行研究。结果表明:水性超薄型防火涂料的热分解过程主要包括2个阶段,504~616 K,即质量损失阶段;616~723 K,即样品的吸热阶段。随后,选用Achar-Sharp微分和Coats-Redfern积分对照法,对丙烯酸乳液和水性超薄型防火涂料的热失质量曲线进行计算,得到了丙烯酸乳液和水性超薄型防火涂料在成碳膨胀过程中的活化能和指前因子。计算结果表明,丙烯酸乳液和水性超薄型防火涂料的热分解过程应遵循扩散控制中的Zhuravlev三维扩散机理,并获得了相应的动力学方程。 相似文献
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以可膨胀石墨(EG)和绢云母为新的阻燃材料,三聚氰胺(MEL)、聚磷酸铵(APP)、季戊四醇(PER)为膨胀阻燃体系,水性乳液为基体制备水性饰面型防火涂料;采用自制高温电炉装置,研究EG与绢云母配比、膨胀阻燃体系、基体拼合对水性饰面防火涂料性能的影响.结果表明,可膨胀石墨和绢云母的质量比为5∶3,APP/MEL/PER的质量比为4∶3∶3,氯偏乳液与纯丙AC261P乳液质量比为22∶3时,制备的防火涂料涂层受热膨胀效果显著,形成了“窝状”构的膨胀炭质层,炭质层孔洞均匀致密,与基材粘附性好、强度高,耐火性能最好,耐火时间高达22min. 相似文献
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采用聚有机硅氧烷乳液、自交联丙烯酸酯乳液和水溶性三聚氰胺甲醛树脂作为成膜剂,配合P—C—N膨胀阻燃体系,以聚磷酸铵(APP)为脱水催化剂、双季戊四醇(DPER)为碳化剂、三聚氰胺(MEL)为发泡剂,制备了一种水性膨胀型防火涂料。介绍了水性膨胀型防火涂料的阻燃性能、机械性能等。 相似文献
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以溴碳苯丙乳液为基料,配以聚磷酸铵、三聚氰胺、季戊四醇等助剂,配制了超薄型钢结构防火涂料;解决了现有钢结构防火涂料阻燃时效短的弊端,并对基料的阻燃机理进行了简单的探讨。自制超薄型钢结构防火涂料的各项技术指标均达到或超过了《钢结构防火涂料通用技术条件》中规定的指标。 相似文献
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水性隔热保温涂料属于新一代的功能型涂料,广泛应用于外墙保温。本文以苯丙乳液为基料,在颜填料中引入真空玻璃微珠,对比了不同隔热填料及玻璃微珠加入量对隔热效果的影响,制备了一种环保型隔热涂料,该涂料涂于物体表面可降低其内部环境温度,达到节能降耗的目的。 相似文献
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为了研究纳米粒子几何结构对膨胀型防火涂料阻燃和抑烟性能的影响,以聚磷酸铵(APP)-季戊四醇(PER)-三聚氰胺(MEL)-硼酸三聚氰胺(MB)为阻燃体系,硅丙乳液为成膜物质,分别添加球形纳米二氧化硅(Si O2)、经硅烷偶联剂KH560改性的管状碳纳米管(KH560–CNT)和片状水滑石(LDH)制备了3种水性膨胀型防火涂料。采用小室法、隧道法及模拟大板法研究了涂层的防火阻燃性能,再结合热重分析、扫描电镜分析和能谱分析,考察了涂层的热解性能和炭层结构。结果表明,球形Si O2和片状LDH能有效增强防火涂料的阻燃和抑烟性能,表现出较好的协效作用;管状KH560–CNT则会恶化防火涂料的阻燃和抑烟性能,表现出对抗作用。当纳米填料的质量分数为0.5%时,片状LDH表现出最优的协效作用,火焰传播比值为12.5,烟密度等级为14.1%。这是因为它能促进涂层在燃烧过程中形成更多的含磷和含硼交联结构,有效增强了炭层的致密性、连续性和隔热性能。 相似文献
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水性环氧防腐涂料的研制 总被引:6,自引:0,他引:6
在117℃恒温备件下,于丁醇中以BPO为引发剂,引发由E-44环氧树脂、a-甲基丙烯酸、丙烯酸丁酯和苯乙烯组成的反应体系,合成了环氧一丙烯酸多元接技共聚物,并向其中加入W(NH3)=28%的氨水,调节PH值为7~9得水性环氧一丙烯酸乳液,进一步制得水性环氧涂料通过红外光谱表征了该多元接枝共聚物的结构,测定了该涂料的各项性能,探讨了环氧树脂、颜填料、烧烤温度和时间、pH值等因素对涂料性能的影响实验结果表明,苯乙烯单体的引入,可增大涂层的附着力,提高涂层的耐冲击性,且该涂料附着力、耐冲击性、耐腐蚀性等各项性能良好 相似文献
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To further improve fire resistance of waterborne polyurethane, the macromolecular intumescent flame retardant (APBDH) was designed and prepared from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), 4-aminothiophenol, benzaldehyde, and hydroxyl-terminated polybutadiene acrylonitrile (HTBN). Then, it was incorporated into waterborne polyurethane (WPU) to preparing flame retarded WPU (FR-WPU). TGA results suggested that the incorporation of APBDH into WPU increased thermal stability of FR-WPU. The fire resistance of FR-WPU were investigated by limiting oxygen index (LOI) test, the vertical burning test (UL-94), SEM-EDS analysis, the Laser Raman test, and cone calorimeter test. An LOI value of 28.82% and a UL-94 V-0 rating can be achieved when the WPU sample conjugated with 7.5 wt% APBDH. It indicated that the fire resistance of FR-WPU remarkably improved and displayed both gas and condensed phase mechanism. As the content of APBDH increased, the tensile strength and the elongation at break of FR-WPU increased firstly and then decreased. The thermo-mechanical behaviors indicated that the storage modulus increase at first and then descend with the addition of APBDH, while the Tgs firstly decreased and then increased. Additionally, the Tgh increased with the addition of APBDH. 相似文献
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The design of environment-friendly fireproof rigid polyurethane foams (RPUFs) that completely prevent ignition or the spread of fires is important for energy conservation and emission reductions. In this paper, an intumescent flame-retardant coating was prepared and coated onto the surface of a RPUF to improve its flame retardancy. Vertical combustion experiments (UL-94) showed that, compared with the pure RPUF, a RPUF coated with the expansion coating successfully self-extinguished without a droplet formed after ignitor removal. Thermogravimetric analyses showed that the expanded coating effectively increased the rate of carbon residue formation. Cone calorimetry showed that when the pigment-to-binder ratio was 3.5:1, with 5% modified montmorillonite, 6% aluminum hydroxide, and 4% titanium dioxide, the intumescent coating effectively reduced the heat release rate and total heat release of the RPUF. Remarkably, the smoke release rate and total exhaust gas volume showed that the expanded coating provided obviously enhanced smoke suppression. Therefore, the flame retardancy and toxic smoke suppression provided by the RPUF thermal insulation material is essential and very useful for healthy development of human society and the environment. 相似文献
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环氧树脂改性水性聚氨酯阻燃涂料的研究 总被引:3,自引:0,他引:3
以E-44环氧树脂改性水性聚氨酯为基料,三聚氰胺、季戊四醇为阻燃剂,制备了一种阻燃涂料.测试了该涂料的附着力、耐水性、吸水率、阻燃性及热失重.结果表明,改性后涂料的涂膜附着力达到1级,耐水时间为240 h,吸水率16.5%,阻燃时间可达10 min以上,耐高温及阻燃性能明显提高. 相似文献