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有机膨胀型钢结构防火涂料缺点是涂层中有机物易分解,且遇火时释出有毒物质。无机膨胀型钢结构防火涂料采用无机低温发泡层和高温发泡层的复合泡层,解决了火灾中钢结构前期升温快和后期阻火涂层熔问题,综合性能好。文中探讨了无机复合泡层梯次发泡机理,涂料配方与涂层结构对防火涂层的阻火隔热性能的影响。 相似文献
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介绍了膨胀型钢结构防火涂料的发展历史,分类介绍了各类膨胀型钢结构防火涂料的组成、性能以及制备工艺。重点综述了近几年国内在膨胀型钢结构防火涂料研究领域所获得成果。进一步分析了其防火机理并对今后的发展方向进行了展望。 相似文献
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超薄膨胀型钢结构防火涂料防腐性能的研究 总被引:5,自引:0,他引:5
介绍了钢材的腐蚀及防腐机理,采用复合改性丙烯酸树脂作为基料,研制出一种既具有高效防火隔热性能,又具有优异的防腐蚀性能的超薄膨胀型钢结构防火涂料。 相似文献
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Intumescent coatings are among the most efficient ways of fire retarding flammable materials. The coatings swell under the influence of heat and form a thick porous charred layer. The latter perfectly insulates the substrate against an excessive increase of temperature and oxygen access. In order to make intumescent coatings effective, proper selection of the essential components, i.e. carbonizing, foam‐producing and dehydrating materials, is necessary. The choice of components for an intumescent fire retardant composition has an essential effect on the rate of charred mass formation and its structure. The influence of different modifiers added to amino resins during the process of condensation on fire retardant and heat‐insulating efficiency of intumescent coatings for wood is presented. The fireproofing efficiency was studied by determining the heat release rate, the effective heat of combustion, the mass loss rate and the specific extinction area during the combustion of samples was investigated. The most efficient coating, both from the point of view of fire retardancy and heat insulating properties, was found to be that based on amino resin prepared from urea, dicyandiamide and monoammonium phosphate and dextrin. The exposing of wood coated with urea‐dicyandiamide‐phosphate‐formaldehyde resin supplemented by dextrin to a heat flux of 35 kW/m2 for 30 min did not result in ignition and no increase occured in heat release, mass loss rates or in effective heat of combustion. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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用醇酸清漆制备的防火涂料的性能 总被引:4,自引:0,他引:4
介绍了以醇酸清漆为基料的外加填料型膨胀型防火涂料的配方及性能,探讨了脱水成炭催化剂、发泡剂以及不同的成炭剂三者的配合比及其用量对防火涂料性能的影响。 相似文献
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新型外墙外保温隔热体系的研究 总被引:1,自引:0,他引:1
介绍了以聚合物保温砂浆为保温层,以太阳反射隔热涂料为饰面层构成的新型外墙外保温隔热系统的结构及特点,采用简化模糊评价法对聚合物保温砂浆进行了优选,并通过热工性能计算,进行建筑节能优化设计。结果表明,该体系适用于我国夏热冬暖、夏热冬冷地区各种建筑物做外墙外保温工程,具有优良的隔热性、安全稳固性、抗裂防水性、防火阻燃性等特点。 相似文献
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以甲基乙烯基硅橡胶生胶为基胶,添加含氢硅油、铂金催化剂等,采用压延工艺制得1~3 mm厚硅橡胶片材;以硅烷偶联剂改性石墨烯并与胶粘剂混合制得涂料,喷涂在硅橡胶片材表面,制得硅橡胶-石墨烯层结构绝缘电磁屏蔽材料。该材料初始电磁屏蔽效能可达82 d Bm,拉伸强度6.5 MPa,电气强度25.3 k V/mm,经紫外光及热老化后,电磁屏蔽效能、力学性能及绝缘性能虽有不同幅度的下降,但仍能满足10 k V带电作业机器人外绝缘及电磁屏蔽应用需求。 相似文献