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。     

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.     

超薄钢结构水性防火涂料的研制及耐火性能

以水为溶剂制备超薄膨胀型钢结构防火涂料,有利于环保和节约成本。以垂直燃烧法评价了研制的防火涂料的耐火性能,研究了环氧改性丙烯酸乳液和苯丙乳液作基料的复配比例和用量对耐火性能的影响。试验显示,环氧改性丙烯酸与苯丙乳液质量比为2∶1,基料用量为25%时,防火涂料的性能最佳。通过正交试验研究了P-C-N膨胀阻燃体系配比对涂层耐火性能的影响,得到最佳配比为m(聚磷酸铵)∶m(季戊四醇)∶m(三聚氰胺)=5∶2∶3。通过热重和差热分析比较了添加无机阻燃剂对涂层防火性能的影响,并对防火涂料进行了热分析。结果表明:涂料各项性能符合GB 14907-2002要求,当涂层厚度为2.2 mm时,耐火时间达到90 m in。     

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.     

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。     

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。     

膨胀型防火涂料的研制及防火机理分析

以不饱和聚酯和环氧树脂双组分作为基体树脂,以聚磷酸铵、三聚氰胺和季戊四醇为防火助剂,辅以填料和其他助剂,配制膨胀型防火涂料.实验结果表明,该防火涂料具有很好的防火性能,在涂层厚度为2.0mm时,其耐火极限时间超过210min.通过差示扫描量热仪(DSC)和热重分析仪(TGA)的配合手段对防火体系和防火涂料的热行为进行分析研究,探讨了不同组分之间的热分解过程和相互作用.借助于Photo和扫描电镜(SEM)观察了防火涂料燃烧后炭化层的形貌,并对炭质层结构进行X射线衍射分析和研究,在此基础上对膨胀型防火涂料的炭化层形成及阻燃机理进行了系统而深入的分析.     

膨胀型防火涂料的阻燃机理及其研究进展

介绍了膨胀型防火涂料的六大基本组成以及其防火阻燃机理,概述了膨胀型防火涂料的国内外研究进展。     

氯化橡胶膨胀型防火涂料的研制

采用正并试验法对氯化橡胶膨胀型防火涂料的配方进行了优选，并用自行设计的模拟大板燃烧法对涂料的防火性能进行测定，得到最佳配方。对小试最佳配方进行了中试，大板燃烧结果表明，该涂料的防火性能达到国家标准一级，理化性能较好。     

X－60饰面型防火涂料

Ｘ－６０饰面型防火涂料Ｘ－６０饰面型防火涂料是以自熄耐燃合成乳液为基料．加入阻燃发泡剂、颜料和填料配制而成的一种遇火膨胀发泡隔热的防火涂料，具有施工方便、防火性能优良、价格便宜等优点．适用于木质室内防火装饰。经国家防火建材质量监督检验测试中心检测，该...     

可剥离防护涂料的研究进展

介绍了国内外可剥离涂料的常用成膜物质,包括聚氨酯树脂、聚苯乙烯树脂、聚乙烯醇、有机硅、聚丁基二烯、氯醋树脂、乙基纤维素、乙烯基高分子树脂、丙烯酸树脂及其共聚物等,讨论了以它们为成膜物质时所制备的可剥离涂料的优劣性,并对可剥离涂料存在的问题和发展方向进行了展望。     

纳米SiO_2/聚丙烯酸酯复合乳液的制备与性能研究

采用原位聚合制备了纳米SiO2/聚丙烯酸酯复合乳液,研究了SiO2的用量对成膜时间、光泽度、吸水倍率、机械及耐酸碱性能和热性能的影响。结果表明添加纳米SiO2后,可以显著降低聚合物乳液的成膜时间,提高胶膜的附着力和硬度、胶膜的抗冲击强度、膜弹性和耐热分解性能。     

Evaluation of Thermal and Film Forming Properties of Acrylic Aqueous Polymer Dispersion Blends: Application to the Formulation of Sustained-Release Film Coated Theophylline Pellets

Abstract

Aqueous acrylic polymer dispersions were blended in order to improve processing and film formation from acrylic polymers with poor film forming properties and/or to obtain sustained-release film coated pellets with optimal barrier properties according to the physicochemical and pharmacokinetic requirements of the active substance.

Heterogeneous film structures are generally obtained from blends containing an association of hard acrylic polymers (Eudragit* RS30D, S100) with the soft Eudragit* NE30D when the drying temperature is lower than the minimum film forming temperature (MFT) of the hard acrylic polymers. The Tg and MFT values of the hard acrylic polymers are not modified in the presence of the soft polymer as shown by the thermograms of these blends which are generally characterized by two individual glassy transitions.

On the other hand, a wide range of drug dissolution profiles can be obtained from film coated pellets either by using, in different proportions, the insoluble but readily permeable Eudragit* RL30D in association with the less permeable Eudragit* RS30D in order to obtain pH-independent permeability membrane, or by mixing the anionic methacrylic acid copolymers (L30D, S100) with the neutral NE30D in order to obtain pH-dependent permeability film coated pellets showing higher dissolution release rates at intestinal pH values.     

Evaluation of Thermal and Film Forming Properties of Acrylic Aqueous Polymer Dispersion Blends: Application to the Formulation of Sustained-Release Film Coated Theophylline Pellets

Aqueous acrylic polymer dispersions were blended in order to improve processing and film formation from acrylic polymers with poor film forming properties and/or to obtain sustained-release film coated pellets with optimal barrier properties according to the physicochemical and pharmacokinetic requirements of the active substance.

Heterogeneous film structures are generally obtained from blends containing an association of hard acrylic polymers (Eudragit^* RS30D, S100) with the soft Eudragit^* NE30D when the drying temperature is lower than the minimum film forming temperature (MFT) of the hard acrylic polymers. The Tg and MFT values of the hard acrylic polymers are not modified in the presence of the soft polymer as shown by the thermograms of these blends which are generally characterized by two individual glassy transitions.

On the other hand, a wide range of drug dissolution profiles can be obtained from film coated pellets either by using, in different proportions, the insoluble but readily permeable Eudragit^* RL30D in association with the less permeable Eudragit^* RS30D in order to obtain pH-independent permeability membrane, or by mixing the anionic methacrylic acid copolymers (L30D, S100) with the neutral NE30D in order to obtain pH-dependent permeability film coated pellets showing higher dissolution release rates at intestinal pH values.     

膨胀型硅丙乳液防火涂料的研究

以硅丙乳液为基料，按正交设计法进行实验，用耐燃时间为主要考察指标，对阻燃体系中各组分的配比进行了研究和优化设计，制备出防火性能好、各项技术性能优异的膨胀型防火涂料。     

丙烯酸树脂涂层对透明导电薄膜整体性能的影响

在有机玻璃(Polymethyl Methacrylate,PMMA)上磁控溅射透明导电金属薄膜,并引入丙烯酸树脂底涂层和面涂层,以期提高透明导电薄膜的耐环境性能,研究了涂层的引入对透明导电膜整体性能的影响.结果表明:引入丙烯酸树脂涂层后,透明导电薄膜的耐环境性能有了明显提高,且丙烯酸树脂涂层由于具有较低折射率,还可作...     

用阴极电解法沉积铝合金铈转化膜

在铈盐溶液中阴电极解的方法沉积铝合金铈转化膜,用电化测试,腐蚀实验,ＳＥＭ和ＥＤＡＸ等分析手段研究了转化膜的性能,结果表明,钪转化膜的形貌垢形貌组成和耐蚀与铝合金表面状态和阴极是否发生析氢反应关系密切,要想获得性能良好的转化膜必须抑制氢气在阴极上析出。     

低表面能海洋防污涂料的配方复配

以国内低表面能高分子材料为基料,采用配方复配方法制备出一系列的环保型海洋防污涂料。利用接触角测量仪、扫描电子显微镜对产物进行了表征。结果表明:溶剂类型对涂料的漆膜性能存在较大的影响;而涂料中的颜料体积浓度(PVC)是影响涂料漆膜表面张力的主要因素。在临界PVC值时,涂料漆膜的表面张力最大,而在临界PVC值两侧,涂料漆膜的表面张力减小。     

复合乳液水溶胶的转化及其流变性的研究

用种子聚合法合成核壳型丙烯酸腹复合乳液,并转化成水溶胶。测定玻璃化温度对核过 合乳液进行表征。考察了聚合方法,丙烯酸用量,氨化温度等对乳液及其水溶胶的影响。     

Laboratory Research on Composite Tunnel Fire-Retardant Coating

Through conducting a fire resistance test as well as other physical and chemical property tests, an optimized ratio of composite binder, inorganic heat insulation fillers, and forming material was determined for the manufacture of a tunnel fire-retardant coating. The manufactured coating exhibited favorable physical and chemical performances. The experimentally obtained results support that this coating has a higher fire resistance and adhesive property in comparison to the majority of existing tunnel fire coatings.