ABS塑胶紫外光固化涂料的配方设计

采用低黏度的3官能树脂搭配脂肪酸改性环氧纯丙树脂(6071)和三羟甲基丙烷三丙烯酸酯(TMPTA)树脂为主要成膜物,以1173、184为光引发剂,添加少量的2官能团硅改性丙烯酸酯以改善流平性能,研制出ABS塑胶紫外光固化涂料,讨论了预聚体结构、光引发剂及稀释剂等对UV光固化表面涂层性能的影响以及塑胶用UV涂料常见问题的解决措施.所制涂料综合性能良好,可应用于ABS塑胶底材的表面涂饰.     

UV固化聚氨酯丙烯酸酯涂料的研制及其应用

以丙烯酸羟丙酯(HPA)、1,6-己二异氰酸酯(HDI)三聚体为主要原料合成低相对分子质量三官能度聚氨酯丙烯酸酯(PUA)低聚物,以该低聚物为主体树脂,添加活性稀释剂、丙烯酸共聚体系、光引发剂及其他涂料助剂制成紫外光(UV)固化聚氨酯丙烯酸酯涂料。同时对UV固化膜性能进行研究,分别讨论了主体树脂含量、活性稀释剂含量、丙烯酸体系含量及光引发剂含量对UV固化涂膜性能的影响,进而对涂料不同组分的种类及配比进行优化,确定了紫外光(UV)固化聚氨酯丙烯酸酯涂料的工艺配方,研究结果表明:该涂料的玻璃化温度(Tg)为60.9℃,涂膜具有较好的综合性能。     

UV光固化环氧丙烯酸酯耐磨涂料的研究

以E51和E44环氧树脂和丙烯酸为原料,制备了UV固化环氧丙烯酸酯耐磨涂料。不同光引发剂、稀释剂和助剂等对UV固化环氧丙烯酸酯涂料固化性能均有影响。研究结果表明,用安息香乙醚与二苯甲酮(质量比为2∶1)的混合体系作为光引发剂的引发效率最高,最佳涂料配方:环氧丙烯酸酯∶丙烯酸丁酯∶安息香乙醚∶二苯甲酮∶滑石粉为70∶20∶4∶2∶4(质量比)。     

水性紫外光固化真空镀膜涂料的制备与性能研究

合成了具有高交联密度的水性聚氨酯丙烯酸酯分散体和高相对分子质量的水性丙烯酸酯分散体,并复配多官能度丙烯酸酯单体、光引发剂制备了水性紫外光(UV)固化真空镀膜涂料。分析研究了各组分对涂膜性能的影响,确定了最优配方。研制的水性UV涂料固化速度快、附着力优异、耐热性能好、上镀性佳,在真空镀膜领域具有良好的适应性。     

UV固化光纤带涂料的研制

用环氧丙烯酸酯与聚氨酯丙烯酸酯共混聚合的方法制备出性能优良的UV固化光纤带涂料。讨论了齐聚物种类,齐聚物共混配比,不同官能度单体配比,齐聚物与单体的配比以及光引发剂及其含量对UV固化光纤带涂料的性能如剥离性、拉伸强度、延伸率和柔韧性的影响。     

镜面银罩光UV固化涂料的制备与应用研究

采用脂肪族聚氨酯丙烯酸酯为主体,搭配合适的单体、引发剂、助剂,研制了一款适用于3C家电领域的镜面银罩光UV固化涂料。重点探讨了UV树脂、UV单体及溶剂对底涂镜面银的影响。研究结果表明:大部分UV树脂主要对涂膜性能起到影响作用,对底涂镜面银效果的影响非常小;UV单体的选用对涂膜性能和底涂铝粉的定向排列都有比较明显的影响;溶剂对底涂镜面银铝粉的排列影响也很明显。依此研究制备的UV固化涂料,经实践应用检验,性能优良,适合3C家电外壳的涂装应用。     

光纤用改善了对玻璃附着力的快速固化UV固化涂料组合物:

UV固化涂料组合物含丙烯酸酯低聚物和丙烯酸乙烯基酯化合物,后者可用作反应稀释剂和附着力促进剂。丙烯酸乙烯基酯化合物有好的混溶性、粘度低并且提高了固化底涂层对玻璃的附着力。由于使用了自由基光引发剂,丙烯酸乙烯基酯化合物提高了未固化底涂层的固化速度。一种涂料可由     

水性UV涂料的研制

采用一种可UV固化的丙烯酸水分散体作为乳化剂,直接将环氧丙烯酸酯低聚物分散入水中形成稳定的乳液,与相应的光引发剂配合制得一种新型的水性UV涂料,对影响涂料性能的因素进行了分析,并与同类溶剂型UV涂料的性能作了比较。     

基于响应面法优化混杂UV固化胶粘剂配方

以环氧丙烯酸酯树脂、环氧树脂(EP)、自由基光引发剂和阳离子光引发剂为主要原料,制备混杂UV(紫外光)固化胶粘剂,并且采用响应面法对混杂UV固化胶粘剂的配方进行优化;以预聚体配比、光引发剂配比作为自变量,以混杂UV固化胶粘剂在玻璃上的附着力作为因变量,采用Design Expert软件对2个自变量进行多次拟合,建立相应的数学模型和3维曲面,得到最优的混杂UV固化胶粘剂配方并进行验证。研究结果表明:二项式是描述因变量和自变量之间关系的最佳模型,当环氧丙烯酸酯树脂/EP质量比为1.19、自由基光引发剂/阳离子光引发剂质量比为1.00时,制成的混杂UV固化胶粘剂在玻璃基材上的附着力(9级)相对最强。     

紫外光固化环氧丙烯酸酯的贮存稳定性

为制备贮存稳定性优良的紫外光(UV)固化涂料,采用自制改性环氧丙烯酸酯树脂、活性稀释剂、光引发剂和阻聚剂制备了UV固化涂料体系并通过考察50°C下贮存7 d前后黏度的变化,研究了活性稀释剂、光引发剂和阻聚剂种类及用量对贮存稳定性的影响,并确定了最优体系:活性稀释剂w(己二醇二丙烯酸酯)=20%~30%,光引发剂w(Darocur 11733)=3.0%,阻聚剂w(对羟基苯甲醚)=0.04%。用红外光谱、凝胶渗透色谱等对贮存前后的体系进行了表征。测试了以最优体系为基础配制的UV涂料的涂膜性能。结果表明,加速贮存7 d后,涂料体系的重均分子量和数均分子量分别增加393 g/mol和403 g/mol,C═C双键含量仅损失4.9%,可见涂料具有较好的贮存稳定性,其漆膜性能与贮存前相比并无差异。     

UV固化不饱和聚酯树脂在涂料中的应用研究

以不饱和聚酯为光敏预聚物,加入光引发剂制得天然大理石表面紫外光固涂层(流水线作业)。研究了光引发剂用量对涂层性能的影响,并将UV固化与化学固化浇注体的力学性能和耐热性进行了对比。结果表明,紫外光固化不饱和聚酯树脂涂层的固化效果,硬度和亮度都达到化学固化的效果,且生产效率大大提高。     

UV固化单体结构与其固化热膜稳定性的关系

以环氧丙烯酸酯、活性稀释单体、光引发剂等为原料，制备UV固化涂层，对主要原料及固化后的涂层进行了热失质量分析：结果表明：活性稀释单体的耐热性能随着官能度的不同而不同，官能度越高则热稳定性越强；官能度相同的活性稀释单体，极性越高，热稳定性也越高。     

紫外光固蓖麻油改性聚氨酯水分散体的研究

制备了蓖麻油封端的聚氨酯水分散体,成膜于四氟乙烯板上,在紫外光照射下,通过水性光引发剂引发,制备得到聚氨酯涂层。通过FT-IR,DSC,凝胶量,耐水,耐溶剂性以及硬度测试对水分散体的物化性能,光固化前后涂膜的结构和性能进行了研究。结果表明,蓖麻油改性聚氨酯在紫外光照下发生了交联反应:固化后涂层的凝胶量较固化前有所增加,涂层的吸水率大幅度下降,铅笔硬度由3H提高至6H,耐甲乙酮拭擦次数增加了158次。     

Preparation of multifunctional thiol‐ and acrylate‐terminated polyurethane: A comparative study on their properties in UV curable coatings

The multifunctional thiol‐ and acrylate‐terminated polyurethane (PU) has been successfully prepared for using as the main resin in the UV curable coatings. The structure and molecule weight of prepared PUs were analyzed by fourier transformed infrared spectroscopy (FTIR) and gel permeation chromatography, respectively. The results showed that the different terminal multifunctional groups have been grafted onto the PU and their difference in molecule weight was significant. Used as the main resin in coatings, the curing kinetic and percentage conversion of the different UV curing coatings system were investigated by real‐time FTIR method, and the effects of terminal functional groups and photoinitiator on the final conversion percentage and conversion rate were also compared. It is observed that the thiol‐terminated PU had higher conversion speed and final conversion percentage due to the remarkable effect of mercapto groups on reducing oxygen inhibition during UV curing process. The shrinkage, viscosity, and adhesion of UV curable coatings with thiol‐ and acrylate‐terminated PUs were also investigated and compared, and the results indicated that the former exhibited lower shrinkage and higher adhesion performances than the latter, along with the lower viscosity. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40740.     

光固化涂料研究进展

介绍了光固化涂料体系几种重要组分:低聚物、活性稀释剂(单体)、光引发剂的研究进展.     

Kinetic studies of a UV-curable powder coating using photo-DSC, real-time FTIR and rheology

The curing kinetics of UV-curable powder coatings based on commercial unsaturated polyesters were monitored using photo-DSC, Real-Time FTIR-ATR and a modified rheometer equipped with a UV source. The effect of physical and chemical factors on curing such as type of photoinitiator, photoinitiator concentration, temperature and atmosphere of curing were evaluated. Coatings containing amounts of photoinitiator from 0.5 to 10 wt% were cured at different temperatures in less than 10 s reaching conversions approximately of 60%. The increase of the temperature of curing reduces the final conversion and also the rate of polymerization due to the chain transfer process and depolymerization that dominates the photopolymerization at high temperatures. The reactivity of the photoinitiators was similar for all the studied photoinitiators apart from benzophenone that was found to be the slowest initiator.     

光固化光纤彩色涂料的研制

采用环氧丙烯酸酯和脂肪族聚氨酯丙烯酸酯共混的方法研制了一种新型光固化光纤彩色涂料。研究了基料树脂、活性稀释剂、光引发剂、颜料、助剂等对涂料综合性能的影响。结果表明，环氧丙烯酸树脂与脂肪族聚氨酯丙烯酸酯配比为40：20，单、双、多官能团稀释单体配比为3：20：10，复合光引发剂用量10％，有机颜料用量1．5％，所配制的光固化光纤涂料性能优良。     

UV curing and matting of acrylate coatings reinforced by nano-silica and micro-corundum particles

For UV curable coatings, the effect of the type of photoinitiator and of the photoinitiator content on surface properties has been studied. Increasing photoinitiator concentrations yielded higher acrylate conversion but a lowering of surface hardness. Thus, curing under oxygen-free conditions with 2 wt.% photoinitiator should be applied rather than 6 wt.% photoinitiator for irradiation in air. Compared to nanocomposite materials, UV-cured polyacrylate coatings reinforced by silica nanoparticles and corundum microparticles exhibit markedly improved scratch and abrasion resistance. By using various grades of corundum, a synergetic effect between nano- and microparticles has been observed. These nano/micro-hybrid composite materials are recommended as clear coat for parquet and flooring applications.     

UV-cured polymer-boehmite nanocomposite as protective coating for wood elements

An organo-modified Boehmite (OMB) was used to prepare nanocomposite UV-cured coatings, based on an innovative photopolymerizable siloxane-modified acrylic formulation, for possible use as protective coatings. 3 wt.% of the nanofiller was dispersed into the mixture in the presence of a proper photoinitiator for UV curing. Different amounts of a silane coupling agent were added to the mixture in order to enhance the compatibility between the nanofiller and the siloxane-modified acrylic formulation. The kinetics of the radical photopolymerization reaction, induced by UV radiations, was studied by photo-calorimetric analysis. The rheological behaviour of the formulations produced was studied as function of the shear rate using a plate and plate rheometer. The formulations, coated on a glass substrate, were photo-cured by using a medium pressure Hg UV lamp. On the coatings photo-polymerized in air were measured: gel content, transparency, scratch and surface hardness. The water absorption effect of the coating based on the novel organic photo-curable nanocomposite on walnut wood elements was evaluated.     

紫外光固化环氧树脂涂层性质的研究

以双酚A型环氧树脂紫外光阳离子固化体系为对象，系统研究了光引发剂和各种单体组成对光固化速度及固化膜机械物理性质的影响。结果表明，光引发剂的种类不但可以有效地影响光固化速度，还能对涂层硬度产生影响；环氧稀释剂在降低体系黏度的同时，对光固化速度和硬度产生负面影响；而羟基化合物对光固化速度几乎不产生影响，但是可以大幅度提高涂层的硬度和柔韧性；三元体系中，由于存在加合作用，在光固化速度和物理机械性质两方面都得到了很好的结果。这就使得能够根据具体要求，配制出各种性能都较好的材料，将大大扩展阳离子紫外光固化技术的应用领域。