膨胀阻燃体系对防火涂料防火性能的影响

主要研究P-C-N膨胀阻燃体系、膨胀石墨配合P-C-N膨胀阻燃体系、鳞片石墨配合P-C-N膨胀阻燃体系,对膨胀型防火涂料的防火性能影响,以及不同膨胀倍数的膨胀石墨、不同含量的膨胀石墨和鳞片石墨,对防火涂料防火性能的影响。结果表明,P-C-N膨胀阻燃体系对膨胀型防火涂料的热释放性能起决定性作用。同时,在膨胀型防火涂料中添加一定比例的膨胀石墨配合P-C-N膨胀阻燃体系,可提高防火涂料膨胀碳层致密性和均匀度,增加其阻燃性能。     

钢结构用膨胀型防火涂料的最新进展

膨胀型防火涂料在暴露于火焰时会膨胀形成保护炭层，有助于限制钢的温升以显著延长其失效时间，防止倒塌。近年来，基于可再生生物基材料、环保材料、一体化膨胀、纳米技术、协效剂和微纳米结构涂层等先进的防火体系被开发出来，为持久性长、释放热量低、烟雾少、有毒气体少、环保、多功能防火涂料的开发提供了潜在的解决方案。简要介绍了新的膨胀型阻燃剂基防火涂料，着重介绍了新膨胀防火涂料用协效剂，并进一步探讨了涂料的防火机理及发展方向。     

膨胀型防火涂料的研究进展

简述了防火涂料的分类;从粘结剂和各种防火助剂(包括脱水成炭催化剂、成炭剂、发泡剂、防火填料和颜料等)方面综述了膨胀型防火涂料的研究进展,同时介绍了可膨胀石墨在膨胀型防火涂料中的应用特点;分析了膨胀型防火涂料的发展趋势.     

超薄膨胀型钢结构防火涂料配方及其对涂料性能的影响

用正交试验设计方法确定了超薄膨胀型钢结构防火涂料的配方。指出聚磷酸铵、三聚氰胺和季戊四醇在膨胀型防火体系中的作用，并确定了其最佳用量。还研究了各种助剂及颜料对涂料防火性能的影响。     

膨胀型透明防火涂料的研制

叙述了木材防火的处理方式、类型、防火机理,A60-506膨胀型透明防火涂料的配方设计和性能测试。结果奉明,该涂料的防火性能达国家一级标准,其他理化性能均通过标准,并具有优异的装饰效果。     

聚磷酸铵在膨胀型防火涂料中的应用研究

研究了聚磷酸铵在膨胀型防火涂料中的应用效果,探讨验证了聚磷酸铵添加量与膨胀防火性能的关系,聚磷酸铵的聚合度、晶型、水悬浮液PH值等指标对防火涂料的耐火极限、粘接强度、稳定性的影响。     

乳液种类对膨胀型防火涂料理化性能和防火性能的影响

配制了以聚醋酸乙烯酯(PEA)乳液、苯丙乳液和纯丙乳液为成膜基料的乳液型膨胀防火涂料,通过涂料常规性能测试和小室燃烧试验,对3种涂料的理化性能和防火性能进行了比较分析.结果表明,PEA乳液型涂料质量损失大,炭化体积最小,膨胀效果极佳,防火效果最好;纯丙乳液型涂料的理化性能最好;而苯丙乳液型涂料则兼有理化性能和防火性能的优点,成本低、环保性强,可以满足防火涂料的各项需要.     

近期期刊文摘

钢结构防腐与防火涂装施工及其品质控制;饰面型防火涂料对不同木质基材的防火性能比较;钢结构防火、防腐双功能涂料的研究;钼酸铵与可膨胀石墨改性超薄型钢结构防火涂料的研究;膨胀型钢结构防火涂料膨胀炭质层的研究;     

一体化膨胀型防火涂料的热解机理研究

为解决传统防火涂料的装饰性问题,设计并合成了一种一体化膨胀型防火涂料.采用热红联用技术对该防火涂料的热解行为进行了研究,发现其热解过程可以分为4个阶段:第1阶段后期,炭化反应开始;第2阶段不稳定磷酸酯结构的断裂释放出CO2等气体,使熔融炭化物发生初步膨胀;第3阶段气体产物使炭化层进一步膨胀,最后硬化形成多孔炭化层;最终阶段炭化层高温热解.研究发现该防火涂料的热解反应发生顺序符合膨胀防火体系的要求,可以顺利地形成具有多孔结构的炭化层来保护基材.     

舰船舱室水性防火涂料体系的研究

介绍了可应用于舰船居住舱室钢材 (非受力构件 )或木材表面的水性膨胀防火涂料体系 ,该涂料体系由自固化水性无机富锌底漆、水性隔离封闭中间漆和水性膨胀防火面漆组成。叙述了底漆、中间漆、面漆的主要性能指标及配套体系性能。工艺研究和实船涂装试验表明 ,该水性防火涂料体系能满足舰船舱室防锈、阻燃、环保等苛刻的要求 ,耐水性、施工性优良     

膨胀型钢结构防火涂料的发展现状与展望

论述了钢结构防火涂料的分类和膨胀型钢结构防火涂料的组成、防火机理,重点介绍了热失重分析(TGA)、差热分析((DTA)、锥形量热仪(CONE)等涂料的表征方法,阐述了膨胀型钢结构防火涂料的研究和应用现状,指出了今后膨胀型钢结构防火涂料将向涂层超薄、装饰性强、施工方便、防火性能高、环境污染低的方向发展.     

超薄型钢结构防火涂料的研制

采用氨基树脂与丙烯酸树脂为基料，以聚磷酸铵，三聚氰胺和季戊四醇为阻燃剂体系，配制超薄型钢结构防火涂料。讨论了基料树脂和阻燃体系的配比对防火涂料性能的影响。试验结果表明，该防火涂料具有较好的物理化学,当干膜厚度为1mm时，其耐火极限为60min。     

Preparation and characterization of the intumescent fire retardant coating with a new flame retardant

In this study the applicability of the new flame retardant for the intumescent fire retardant coating (IFRC) daubed on the top of the plywood was investigated. The following are the three kinds of flame retardants used in this study: (1) the artificial mesophase graphite powder (MGP), (2) the sericite (Al₄(OH)₄(KAlSi₃O₁₀)₂), and (3) the graphite/sericite mixture. The desirable sizes of MGP and sericite were obtained by sieving, and then the surfaces of MGP and sericite were modified using a mechanofusion system. The MGP and sericite were characterized using a scanning electron microscope (SEM), a particle size analyzer, and an energy dispersive spectrum (EDS). The IFRC, which consisted of 19.8% of the flame retardant, 15% of the dehydrate agent, 18% of the foaming agent, 7.2% of the resin binder, and 40% of the solvent, was prepared and daubed on the top of the plywood. The test of the fire protection of IFRC was conducted using a flammability 45° tester. The IFRC with the flame retardant of the raw MGP (or sericite) was also prepared to study the effects of the size distribution and the configuration of the flame retardant on the capability of fire protection of IFRC. The mass ratio of MGP to sericite also substantially affects the capability of fire protection of IFRC. Most interestingly, the capability of the fire protection of IFRC with the flame retardant of the raw material is better than that of IFRC with the flame retardant of the sieved and surface-modified material.     

A study of the behaviour of a protected vessel containing LPG during pool fire engulfment

Theoretical and experimental investigations of various methods for protection against fires of vessels containing liquefied petroleum gases (LPG) (safety relief valves, intumescent fire retardant coatings, thermal isolation) have been carried out. A simple mathematical model has been proposed, which describes dependences of various parameters on time. These parameters are temperature, pressure and mass of LPG, temperatures of the vessel's walls and thermal protection layer. The case of total fire engulfment of the vessel with LPG was considered. Experiments have been executed, which were aimed on the investigation of the behaviour of vessels with LPG (50 l), equipped with protective devices during total fire engulfment. It was found out that the safety valve prevented an explosion of the vessels without any other protective measures. The presence of the intumescent fire retardant coating caused a significant delay in operation of the safety valve. A rather good agreement between the theoretical and experimental data was obtained. It has been revealed that the considered methods for protection of LPG vessels are promising in regard to prevention of explosions in these vessels at the fire engulfment.     

硅溶胶-单组分水性氟树脂复合涂料的制备

采用价廉的无机硅溶胶与单组分水性氟树脂为原料进行物理混拼,初步制备了硅溶胶-单组分水性氟树脂复合涂料,将其应用于铝合金表面,通过对涂层理化性能的检测,该涂料能够符合饰面型防火涂料的国家标准,涂料不燃,不会放出浓烟,具有一定的防火性.     

含磷本质阻燃水性聚氨酯及其膨胀防火涂料的应用

以甲苯二异氰酸酯(TDI)、聚丙二元醇(PPG)为单体,以二羟甲基丙酸(DMPA)和含磷阻燃剂FR-6为扩链剂,制备不同组分的含磷本质阻燃水性聚氨酯(FPU)。再以聚磷酸铵(APP)、双季戊四醇(DPER)、三聚氰胺(MEL)为膨胀阻燃体系制备出钢结构水性防火涂料。采用红外光谱、热重分析、力学测试、锥形量热、背面温度、扫描电镜、炭层强度和X射线光电子能谱(XPS)分别对乳胶膜和涂层进行了分析。研究表明,随着阻燃剂FR-6用量的提高,乳胶膜和涂层的最大热分解速率下降,残留质量提高。乳胶膜的拉伸强度提高,断裂伸长率降低。在阻燃剂FR-6含量为15%时,涂层的热释放速率最低,残炭强度最大,背部稳定温度为185.7℃。同时XPS表明残炭中残留了更多的P、N元素,耐火性能提高。     

MQO树脂为基体研制电路板组件保形涂覆液

采用新型功能添加剂,在缩短硫化时间避免涂膜难干或发粘的同时,解决了体系储存稳定性下降的问题;选择使用阻燃剂,有效提高其阻燃性并赋予涂覆膜自熄性,且保证涂膜原有的透明性;最终成功制备出透明保形涂覆液.涂覆液固化时间短(20min内完全表干),涂膜具有良好的粘附力且阻燃性好(氧指数为49%),介电强度高(37kV/mm),完全可以满足实际电路板涂覆生产线要求.     

Fire structural modelling of fibre–polymer laminates protected with an intumescent coating

This paper presents a new modelling approach to analyse the fire structural response of fibre–polymer laminates protected with an intumescent surface coating. The model is designed to predict the temperature, decomposition, softening and failure of laminates with an intumescent coating in fire. The modelling involves a three-stage analytical approach: (i) thermal-chemical analysis of the intumescent coating, (ii) thermal-chemical analysis of heat transfer through the laminate substrate (beneath the intumescent coating), and (iii) thermal-mechanical analysis of the softening and failure of the laminate under tension or compression loading. Fire structural tests were performed on a woven glass/vinyl ester laminate coated with an organic intumescent material to validate the modelling approach. It is shown the model can predict with good accuracy the temperature distribution and swelling of the intumescent coating with increasing exposure time to a constant heat flux. The model can approximate the temperature, softening and failure of the laminate substrate.     

可膨胀石墨协同阻燃的研究进展

可膨胀石墨(EG)是一种良好的环保型阻燃剂,但单独使用时阻燃能力仍显不足,利用阻燃剂之间的协同阻燃作用能够大幅提高EG的阻燃效果.根据与EG起协同作用的阻燃剂的种类不同,把EG的协同阻燃分为磷系协同阻燃体系、膨胀型阻燃剂(IFR)协同阻燃体系、氢氧化镁协同阻燃体系以及其他阻燃剂协同阻燃体系4类,介绍了不同协同阻燃体系的阻燃性能和阻燃机理的研究进展,并展望了EG协同阻燃的发展趋势和应用前景.     

膨胀阻燃多层膜改性苎麻织物/苯并噁嗪树脂层压板的制备及性能

为提高苎麻织物作为复合材料增强体时的阻燃性能,首先,采用层层组装法在苎麻织物表面构筑了氨基化多壁碳纳米管（MWCNT）-聚磷酸铵（APP）与聚乙烯亚胺（PEI）-APP膨胀阻燃多层膜;然后,将改性后的苎麻织物与苯并噁嗪树脂复合制备了苎麻织物/苯并噁嗪树脂层压板,并研究了层压板的热降解行为、阻燃性能与力学性能。结果表明:与纯苎麻织物/苯并噁嗪树脂层压板相比,含MWCNT-APP与PEI-APP膨胀阻燃多层膜的层压板热释放速率峰值由106.6 W·g-1降低至53.4 W·g-1和53.0 W·g-1,总热释放量由12.3 kJ·g-1降低至7.6 kJ·g-1和9.0 kJ·g-1,极限氧指数由23.5提高至27.2和27.0,UL94级别由无级别提高至V-0和V-1级,弯曲强度由81 MPa提高至122 MPa和143 MPa,弯曲断裂伸长率由1.2%提高至1.4%和1.7%,拉伸性能也得到了一定的改善。所得结论表明使用MWCNT-APP与PEI-APP膨胀阻燃多层膜可在提高层压板阻燃性能的同时,改善其力学性能。