共查询到18条相似文献,搜索用时 875 毫秒
1.
2.
3.
4.
5.
6.
7.
水性聚氨酯阻燃涂料燃烧试验研究 总被引:3,自引:0,他引:3
对水性聚氨酯涂料的阻燃性能进行了研究。选用不同的阻燃体系对水性聚氨酯涂料进行改性,得到不同类型的水性聚氨酯阻燃涂料,使其防火隔热的效果大大增强,对不同阻燃体系的性能进行比较分析,得出最佳的体系和最好的配比。 相似文献
8.
从防火涂料阻燃原理着手,介绍了水性防火涂料的发展概况,并分类进行了详细阐述,提出水性防火涂料存在问题的解决途径,并对水性防火涂料的发展趋势作了预测。 相似文献
9.
从防火涂料阻燃原理着手,介绍了水性防火涂料的发展概况,并分类进行了阐述,针对水性防火涂料存在的问题提出了解决途径,并就水性防火涂料的发展趋势做了展望。 相似文献
10.
介绍了膨胀型阻燃涂料的组成和阻燃机理,以及膨胀石墨协效剂在膨胀型阻燃涂料中的应用,并对阻燃技术的发展前景进行了展望。 相似文献
11.
软质聚氨酯泡沫(FPUF)是聚氨酯材料的主要产品之一,由于其较低的密度和热传导率而易燃,在燃烧过程中会放出大量烟雾和有毒气体,对FPUF进行阻燃处理尤为重要。卤系阻燃剂由于存在潜在的毒性和环境问题而受到限制,因此FPUF的无卤阻燃技术是今后主要的研究方向。本文综述了近年有关软质聚氨酯泡沫无卤阻燃技术的研究进展,包括添加型无卤阻燃剂法、反应型无卤阻燃剂法、层层组装涂层法。指出开发高相对分子质量、含多种阻燃元素的有机添加型阻燃剂和膨胀型阻燃剂以及复配型阻燃剂,解决层层组装涂层法的组装慢等问题将是FPUF无卤阻燃技术的发展趋势。 相似文献
12.
Chang-Hwan Park Jong-Pyo Wu Hong-Soo Park Seong-Kil Kim 《Journal of Coatings Technology》1997,69(875):41-47
Polyurethane flame retardant coatings are composed of polyols and polyisocyanates. Flame retardant groups are usually introduced
to the polyol structure. In this research intermediates were obtained by esterification of 2,4-dichlorobenzoic acid and trimethylolpropane
for the purpose of introducing a flame retardant group to the polyol structure. Then chlorine-containing modified polyesters
were synthesized by polycondensation of trimethylolpropane, adipic acid, 1,4-butanediol, and the intermediate. The content
of 2,4-dichlorobenzoic acid in the intermediate was varied with 10, 20, and 30 wt%. Two-component polyurethane flame retardant
coatings were prepared by blending the products with polyisocyanate. Various physical properties of these new flame retardant
coatings were comparable to non-flame retardant coatings. They showed drying times of four to seven hours and pot life times
of 14–20 hr, which could belong to the flame retardant coatings with long pot life time. The coating with 30 wt% 2,4-dichlorobenzoic
acid showed a self-extinguishing property in the vertical burning test.
Dept. of Chemical Engineering, Yongin 449-728, Korea.
Ansan 425-110, Korea. 相似文献
13.
Polyurethane coatings are highly flammable, and because of their widespread applications on different substrates (wood, steel, and building materials), there is a need to increase their fire‐safety properties. Intumescent additives sharply suppress the flammability properties of polyurethane coatings. Two problems accompany intumescent additives: their high loading percentage and incompatibility with polyurethane coatings. In this research, we succeeded in increasing the compatibility by mixing intumescent additives with a butyl acrylate polymer and in lowering the flame‐retardant additive loading (up to 20%) by incorporating newly modified montmorillonite. The flammability properties of the new intumescent coatings were characterized with a cone calorimeter. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
14.
15.
水性超薄膨胀型钢结构防火涂料的制备 总被引:2,自引:1,他引:1
以有机硅改性的丙烯酸酯乳液为基料,多聚磷酸铵(APP)、季戊四醇(PER)、三聚氰胺(MEL)为膨胀阻燃体系,制备水性超薄膨胀型钢结构防火涂料;采用硼酸和可膨胀石墨(EG)改性防火涂料。研究表明,同时用w(硼酸)=4%,w(EG)=5%改性防火涂料,涂层的耐火极限达到93 min,热失质量分析(TGA)测试表明w(硼酸)=4%,w(EG)=5%共同改性的防火涂料在700℃时最终残炭量是44%。扫描电镜(SEM)分析结果表明硼酸/EG改性的残炭层形成了致密的"蜂窝"状结构。 相似文献
16.
17.
18.
以水性乳液为基体,化学膨胀与物理膨胀相结合的阻燃膨胀体系,其中聚磷酸铵(APP)、
三聚氰胺( MEL)、双季戊四醇( DPE)为化学膨胀体系,可膨胀石墨( EG)、石英纤维为物理膨胀体系,制备水性超薄膨胀型防火涂料。考察了基体类型、膨胀阻燃体系配比对水性防火涂料防火性能的影响。结果表明,聚醋酸乙烯酯乳液与纯丙乳液质量为比 1∶1时, APP/MEL/DPE的质量比为 10∶6∶5,EG与石英纤维的用量均为 3%时,制备的防火涂料涂层受热膨胀效果显著,与基材附着力好,强度高,机车地板结构耐火时间达到 60 min,满足 HG/T5367. 4—2020对结构件的防火要求;有助于实现轨道交通车辆结构防火的更高要求,完成进口产品在轨道交通行业的国产化替代。 相似文献