紫外光固化环氧丙烯酸酯涂料的研究

合成了适于配制紫外光固化涂料的环氧丙烯酸酯,重点研究了反应温度对环氧树脂与丙烯酸反应的影响,并利用红外光谱观察了产物的结构,以及不同活性剂、辐射时间对固化涂膜性能的影响。     

环保型木器涂料

介绍水性和紫外光固化两类环保型木器涂料及其研究进展。水性木器涂料主要为丙烯酸酯与聚氨酯两大类，其研究进展集中表现为乳液改性，包括自交联、共混共聚、微乳液等；紫外光固化木器涂料包括其光固化树脂、活性稀释剂和光引发剂的功能及进展；指出研究新型乳液以提高水性木器涂料涂膜的表面性能，开发新型原材料以降低紫外光固化木器涂料的成本、扩大适应范围将成为今后环保型木器涂料的研究重点。     

涂料用聚(酯-酰胺)超支化聚合物合成与性能研究

以苯酐和含氮二元醇为原料，合成了聚(酯-酰胺)结构的超支化聚合物。对得到的聚合物的结构用红外光谱、差热分析等方法进行了表征，测定了聚合的相对分子质量，并用油酸与聚合物的端羟基反应，得到适用于涂料的树脂。研究了树脂溶液的流变性及以聚氨酯为固化剂配制成的涂料的涂膜性能，结果表明，该涂料可在室温下快速固化，得到的涂层具有很好的漆膜性能。     

丙烯酸聚氨酯涂料成膜过程(Ⅰ)溶剂扩散系数的估算

采用傅里叶变换红外光谱（FTIR）测定了不同时间下丙烯酸聚氨酯涂料体系成膜聚合物的固化度及固化反应速率常数,并将该体系按二元聚合物-溶剂体系进行简化处理,在Vrentas-Duda自由体积理论模型的基础上,利用Di-Benedetto方程关联了溶剂的扩散系数与涂膜的固化度,建立了涂膜中溶剂扩散系数的预测模型.结果表明,本涂膜体系中溶剂扩散系数是溶剂浓度、干燥时间的函数.     

UV固化涂料

UV固化反应属于能量引发聚合反应,在光引发剂存在下,成膜物经自由基反应几秒钟可形成交联固化涂膜.UV固化涂料可分为水性UV 固化涂料、UV固化粉末涂料和溶剂型UV固化涂料.本文重点介绍UV固化涂料的固化体系,UV固化粉末涂料、水性UV固化材料和溶剂型UV固化涂料.     

UV固化彩色涂料固汇性能的研究

从光引发剂、涂膜厚度,单体,颜料几个方面研究了影响红、黄,蓝３种体系紫外光固化涂料固化速度的因素。光引发剂含量为最优值时,固化速率强达最大。不同颜料对固化速度的影响不同,但无论哪一种颜料,随着颜料含量的增大,固化速度都降低。涂膜厚度对固化速率的影响很大,涂膜厚度对固化速率的影响很大涂膜越厚,固化速率越低,一定含量的多官能度单体可提高固化速率。     

有色UV固化塑料涂料的制备与研究

针对UV固化塑料涂料的现状,介绍一种高效生产率、节能降耗,且具有良好外观与优异性能的有色UV固化塑料涂料。讨论了该涂料体系用UV树脂、光引发剂、活性稀释剂、润湿流平剂和环保溶剂的选择,以及光能量对涂膜性能的影响。     

亲水涂料用P(AA-co-AM)树脂的合成及性能研究

以过硫酸钾-亚硫酸氢钠为引发嗣体系,遥过丙烯酸（AA）和丙烯酰胺（AM）进行水溶液共聚,合成了亲水涂料用P（AA—co—AM）树脂。研究了引发剂用量,反应温度,反应时间,单体配比等条件对共聚反应的影响及其对亲水涂膜有关性能的影响,并采用红外光谱（FTIR）对共聚物进行表征。结果表明,已制备出适于亲水涂料甩的亲水树脂。     

低黏度柔性UV-热双重固化涂料

用环氧树脂、丙烯酸、自制的甲苯二异氰酸酯预聚物以及聚乙二醇合成了2种改性环氧丙烯酸酯TDI-1和PEG-1。物理混合2种改性EA得到光-热双重固化的改性环氧丙烯酸树脂。通过红外光谱表征了改性前后官能团的变化情况,分析了这2种改性环氧丙烯酸树脂(TDI-1和PEG-1)通过物理混合的UV-热双重固化涂料的性能变化情况。测试结果表明,TDI-1和PEG-12种改性环氧丙烯酸树脂混合使用时比单独使用时涂膜的性能更好。所研制的低黏度柔性UV-热双重固化涂料适合于不耐热、不规则的纸张、木器、塑料、汽车零部件等的双重固化涂装。     

导电涂料

导电涂料用光化学活性辐射固化组合物；透明抗静电红外屏蔽涂料组合物及其制备；基于聚烯烃的涂料、由其形成的组合物、用其涂覆的耐湿抗静电物件及涂膜     

水性环氧涂膜的亲水改性研究

采用水溶性高分子聚丙烯酰胺(PAM)作为接枝改性剂,对水性环氧涂料进行亲水改性,分析了亲水改性的机理,采用傅里叶变换红外光谱仪对改性前后所得涂膜的结构进行表征,证实了接枝反应的存在,用液滴状分析仪(DSA)测量涂膜的接触角,用Neumann法计算涂膜的表面能,并研究了聚丙烯酰胺溶液用量、固化剂用量和聚丙烯酰胺溶液的质量浓度对涂膜亲水性的影响。     

Protective properties of epoxy-based organic coatings on mild steel

The protective properties of epoxy-based organic coatings on mild steel substrates have been studied using the electrochemical impedance spectroscopy (EIS) technique. The effects of coating composition, film thickness and curing temperature on the lifetime of the epoxy coating were investigated. The results obtained indicate that the film composition dramatically affects the rate of corrosion of the metallic substrate. Coatings with low and high content of curing agent exhibit early failure when exposed to an air-saturated 0.5 M aqueous solution of NaCl. Extended lifetimes were observed for samples with a content of the curing agent equal to 8.5% by weight. An increase in lifetime was also observed on increasing the film thickness and the curing temperature. The failure mechanism seems to occur in two steps: the first step is related to water uptake in the film while the second step is related to Cl⁻ ion diffusion through the coating. The results have been interpreted in terms of a model in which the dielectric properties (capacitance and resistance) of the coating depend strongly on the coating composition and are affected by both the water and salt uptake into the film.     

PTP铝箔用聚氨酯印刷底油的制备及成膜性能研究

以4,4’-二环己基甲烷二异氰酸酯(HMDI)、分子量1000的聚四氢呋喃(PTMG1000)为原料,二月桂酸二丁基锡(DBTDL)为催化剂,聚醚4110为固化剂,通过本体逐步聚合方法制得了聚氨酯(PU)印刷底油。研究了溶剂、配方以及固化温度对涂膜的影响。通过相应的标准对其黏度、耐溶剂性能、硬度、粘接性能进行了测试;利用傅里叶红外光谱(FTIR)、凝胶渗透色谱仪(GPC)、表面张力仪、热失重分析仪、万能拉伸试验机对涂膜的结构、热稳定性、亲疏水性、力学性能进行了分析表征。结果表明,当原料配比NCO/OH(物质的量)为2.4时,混合溶剂乙酸乙酯∶乙酸丁酯∶丙烯酸异冰片酯质量比为3∶2∶2,固化温度为50℃时,制得涂膜的综合性能最好。值得一提的是,该法制得的涂膜的断裂伸长率达到了580%,有非常突出的柔韧性,并且材料无毒无害,十分适合作为PTP铝箔的印刷底油。     

低温固化环氧粉末涂料制备及性能研究

通过转矩流变仪用E-12型环氧树脂和TC-125固化剂及其他助剂在90℃下熔融混合10min,然后在平板硫化机上冷压3min,最后经过球磨机粉碎制得环氧粉末涂料。制得的粉末涂料和漆膜经过差示扫描量热法和红外光谱分析．并讨论了固化剂用量、升温速率等对涂料性能的影响。结果表明：该粉末涂料可实现低温固化,固化条件为120℃下恒温固化35min;固化剂用量为28％时,涂膜的各项物理性能良好。     

Antigraffiti polyurethane coating containing fluorocarbon side chains grafted polymethylsiloxane

The novel polymethylsiloxane grafted by fluorocarbon side chains was synthesized via hydrosilylation reaction of polymethylhydrosiloxane (PMHS) with 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) in the presence of Karstedt’s catalyst. The reaction factors of reaction temperature, reaction time, catalyst dosage, solvent dosage, and molar ratio of the reactants were investigated through orthogonal experiments. Under optimal conditions, the grafting ratio of HFBA to PMHS reached 91.6%. The structure of the grafted polymer was characterized by FTIR and ¹H NMR spectra. The synthesized polymer was incorporated into two-component polyurethane coating formulations as an additive to prepare antigraffiti coatings. After curing, the contact angle measurement was performed and the results showed that surface free energy of the coating film decreased dramatically from 30.7 to 21.4 mJ/m². The inks of permanent markers cannot spread readily on the coating film and can be removed easily, indicating that the incorporation of the synthesized polymer endowed the coating with admirable antigraffiti performance. XPS analysis revealed that atomic concentrations of silicon and fluorine near the surface (about 10 nm) were much higher than deeper within the film (about 100 nm), suggesting that these two elements had a strong migration tendency toward the coating–air interface. AFM measurement showed that the inclusion of synthesized polymer in coating did not affect the surface roughness of the film.     

正硅酸乙酯制备无机耐高温涂料的研究

以正硅酸乙酯为原料,在盐酸溶液的催化下,水解缩合制成硅树脂.再配上各种颜料、填料和助剂,以水为溶剂,制备环保型耐高温涂料.本研究讨论了颜填料(玻璃粉)、二甲基甲酰胺(DMF)、偶联剂、、固化温度等对涂料性能的影响.实验发现:正硅酸乙酯制备耐高温涂料热固化后呈无机膜.随着温度的升高,固化膜对铁板的附着力和硬度显著提高,附着力达1级,铅笔硬度大于6H.玻璃粉在500℃以上可熔融成膜,使涂料能耐更高的温度;DMF和偶联剂均能减少涂膜开裂倾向.     

光固化聚氨酯丙烯酸酯涂料的合成及其性能研究

采用异佛尔酮二异氰酸酯(1PDl)制备了可光固化的聚氨酯丙烯酸酯预聚体,研究了制备过程的条件,选择了活性稀释单体配制成涂膜固化,对其一些物理性能进行了测试研究。结果表明,和常用的2,4-甲苯二异氰酸酯(TDl)制备的可光固化的聚氨酯丙烯酸酯预聚体相比,该预聚体具有更加优良的力学性能和抗老化性能。     

桐油基水性光固化树脂的合成及性能研究

以生物质资源桐油（TO）、马来酸酐（MA）为原料,通过Diels-Alder反应合成了桐油酸酐,再以其与丙烯酸羟乙酯（HEA）反应,经中和水化制备了桐油基水性光固化树脂。通过红外光谱（FTIR）、核磁共振氢谱（1H NMR）表征了合成产物的分子结构。考察了TO、MA以及HEA的比例对桐油基水性光固化树脂的乳液性质、光固化活性以及涂膜性能的影响。研究结果表明,当n(TO):n(MA):n(HEA):n(TEA)= 1:2.5:2.5:2.5时,合成的桐油基水性光固化树脂的稳定性、光固化活性以及涂膜性能最优异。     

Photocurable epoxy/cubic silsesquioxane hybrid materials for polythiourethane: Failure mechanism of adhesion under weathering

A new inorganic–organic hybrid coating containing epoxy‐functionalized cubic silsesquioxane (CSSQ) has been developed, which can be polymerized cationically by UV radiation. This solvent‐free solution can be used as hybrid coating for polythiourethane (PTU) substrate. The surface properties of the coating film were determined by adhesion and scratch resistance. The excellent adhesion of coating films on the substrate was observed at the initial stage before weathering, but deteriorated after exposure to the sunshine. The low viscosity of hybrid coating solution (～ 15 mPa s) leads to fast curing and the formation of hybrid coating film during the photopolymerization reaction. The adhesion failure was evaluated by atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and X‐ray photoelectron spectroscopy (XPS) analyses. AFM images showed that the surface is smooth at the initial stage, but a texture surface was developed after weathering. The shrinkage of the hybrid film due to the increase in crosslinking density by postpolymerization would affect the surface roughness after weathering. XPS analysis indicated that the adhesion failure occurred by photodegradation of the PTU substrate during weathering. The weathering resistance was significantly improved by adding UV absorbers, which protected the polymer substrate from the photodegradation. The advantages of the hybrid coating include fast cure speed, solvent‐free formulation, and improved surface properties of the coating film. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008