环氧丙烯酸树脂合成工艺的改进

探讨了以环氧树脂和丙烯酸为原料的酯化反应,合成了紫外光固化的环氧丙烯酸树脂。通过研究催化剂、阻聚剂的种类、加入量、聚合方式、加料方式、反应温度等因素对转化率的影响,得到了合成环氧丙烯酸树脂的较佳工艺条件。并用IR对环氧树脂与环氧丙烯酸树脂的结构进行了表征。     

紫外光固化光敏涂料的研制

紫外光固化光敏涂料技术对被固化对象、固化深度和胶黏剂都有一定的要求,因此不能很好地适应高速自动化生产线的要求。本研究以三苯基磷为催化剂、双酚A型环氧树脂和丙烯酸为反应原料制得了环氧丙烯酸光敏树脂,再与活性稀释剂、光敏剂配制成环氧丙烯酸酯光敏涂料。对环氧树脂和丙烯酸的摩尔比、温度、投料方式等因素对合成反应的影响进行了深入研究,对光敏剂对涂料性能的影响也进行了分析,并且得出了合理的使用条件,为紫外光固化光敏涂料技术的应用发展提供了一个新思路。     

紫外光固化环氧丙烯酸树脂的制备与性能研究

在不除氧、无气氛保护的条件下用环氧树脂和丙烯酸直接合成了可光-热双重固化的环氧丙烯酸树脂。通过测量所获得改性树脂的红外图谱、固化时间及固化膜的柔韧性、硬度等数据,研究了丙烯酸用量、混合温度、曝光时间等因素对环氧丙烯酸树脂合成及性能的影响。结果表明,当丙烯酸与环氧基之间的物质的量比在1.02∶1,反应温度在85~90℃时,所得树脂的光固化速率最快,固化后产物的硬度大、柔韧性好、附着力强。紫外光辅以低温热固化的固化工艺,有助于减少树脂中低聚物的挥发,提高反应程度,从而获得较高的固化膜百分率。另外,对不同工艺条件下影响柔韧性能的树脂结构也进行了分析。     

云南省化工研究所生产的一种新型光敏树脂在我省面市

<正> 环氧丙烯酸树脂,又称光敏树脂,是近年来发展起来的一类新型热固性树脂。它既具有固化后的环氧树脂的优良化学物理性能,又兼备不饱和聚酯树脂的令人满意的固化特性和易操作特性。它在紫外光下即可固化,性能大大优于环氧树脂。同时,因固化产物具有三向交     

环氧丙烯酸酯类光敏预聚物的合成研究

制备了可紫外光固化的环氧丙烯酸酯,研究了反应温度、催化剂、阻聚剂等因素对环氧树脂与丙烯酸反应的影响。     

鎓盐催化剂对环氧树脂丙烯酸酯化反应的影响

用钅翁盐作催化剂,以E 44和E 12环氧树脂与丙烯酸作主要原料,制备了适于配制紫外光固化涂料的环氧丙烯酸酯树脂,讨论了催化剂的种类与用量对合成反应及产物的影响,找到了一个催化剂适宜用量与反应时间。     

紫外光固化环氧丙烯酸酯涂料

本文主要介绍了紫外光固化环氧丙烯酸酯涂料的树脂合成,涂料制备,测试性能,涂料的成膜机理以及应用领域。树脂的合成,主要是将丙烯酸基因引入环氧树脂中,使得环氧大分子两端接上丙烯酸酯基,从而具备光固化的特性。紫外光固化环氧丙烯酸酯涂料的主要成分为环氧丙烯酸酯树脂,光敏剂和活性稀释剂,其中活性稀释剂的选择使用对涂料的施工性能与涂膜性能都有一定的影响。环氧丙烯酸酯涂料添加光敏剂后,用紫外光照射,光敏剂分解产生游离基,然后通过游离基聚合反应,线型的环氧丙烯酸酯树脂与活性稀释剂交联生成体型的高聚物,涂层便固化成膜。紫外光固化环氧丙烯酸酯涂料在测试性能方面,表现为突出的光泽度及硬度,另外,冲击强度和附着力也比较理想,因此,其用途十分广泛。特别适用于塑料制品,纸张、木材、皮革、织物、玻璃、印刷线路板等不能烘烤的产品的涂装,也适用于金属制品,标牌等产品作表面保护装饰涂层。     

UV固化环氧丙烯酸酯的合成和水性化研究

紫外光固化技术是一项节能和环保的新技术。环氧丙烯酸酯由于具有对环境污染少、能耗低、效率高、收缩性小、化学稳定性好的优点,是目前应用最广的光固化预聚物之一。本文以丙烯酸和环氧树脂NPER-032为原料,合成可紫外光固化环氧丙烯酸酯,进一步用顺丁烯二酸酐与该环氧丙烯酸酯反应,在分子链中引入羧基,再用有机胺与之中和,合成水性紫外光固化环氧丙烯酸酯。     

紫外光固化低黏度环氧丙烯酸酯的合成研究

以双酚F环氧树脂和丙烯酸为原料,合成紫外光固化低黏度双酚F型环氧丙烯酸酯。讨论了引发剂、阻聚剂、反应温度等因素对反应的影响,用IR对环氧树脂及环氧丙烯酸酯的结构进行了表征。     

辐射固化涂料

,,02150紫外光固化木器涂料的研制〔刊)/姚东等//中国涂料一1998,(6)一32一34 介绍对紫外光固化木器涂料的研制过程,原材料的选择和施工中出现的问题及对策。表2参7,,02151光固化涂料用低粘度环氧丙烯酸醋的研究〔刊〕/张仕茜等//涂料工业一1998,28(11)一6一9采用双轻基化合物与环氧树脂进行反应,制取低粘度改性环氧树脂,然后用丙烯酸醋化制得光固化涂料用低粘度环氧丙烯酸酷。研究了催化剂类型和用量对环氧树脂改性反应,以及不同结构、不同链长双羚基化合物和双经基化合物与环氧树脂当量比对环氧丙烯酸醋粘度及其配制的光固化涂料的性能影…     

光固化ADGDE齐聚物的合成及特性

一缩二乙二醇二缩水甘油醚 (DGDE)与丙烯酸为原料 ,合成紫外光固化环氧丙烯酸(ADGDE)齐聚物。研究了催化剂用量、阻聚剂种类以及反应温度对反应速度和产物性能的影响 ,确定了合成工艺条件 ;用 FTIR表征了结构 ,并与通用双酚 A型环氧丙烯酸酯 (双酚 A型 AEP)比较了颜色、粘度和光固化特性。结果表明 ,ADGDE颜色浅、粘度仅为双酚 A型 AEP的 1 /1 0 0 0、光固化速度快     

Preparation and characterization of dual curable adhesives containing epoxy and acrylate functionalities

Bisphenol A type methacrylate, glycidyl methacrylate, acrylic acid and a trifunctional monomer were cured using both ultraviolet (UV) and thermal methods. The UV and thermal curing behavior of these components was evaluated using photo-differential scanning calorimetry (Photo-DSC) and Fourier Transform infrared spectroscopy (FT-IR) analyses, as well as gel fraction and pendulum hardness measurements. The reaction rate was fast, and an increasing amount of CC double bond character was observed by FT-IR, demonstrating an effective reaction in the presence of both UV irradiation and heat. The gel fraction analysis also confirmed the formation of crosslinks in the structure after the curing process. The pendulum hardness test revealed the nature of the curing process at different UV doses after UV and thermal curing. The adhesion strength was also evaluated as a function of epoxy group concentration, demonstrating that adhesion increased with increasing epoxy group content. The thermal degradation characteristics were monitored by thermal gravimetric analysis (TGA). The bonding between the epoxy and carboxyl groups resulted in a delayed degradation of the cured adhesive.     

环氧丙烯酸酯涂料的紫外固化研究

采用E-44环氧树脂与丙烯酸反应，用翁盐作催化剂，制备了适于配制竹木基涂饰的紫外光固化的环氧丙烯酸酯预聚物，讨论了催化剂的种类对合成反应的影响。对固化产物进行了红外表征。光引发剂种类和交联剂含量对固化速率的影响、光引发剂含量对凝胶含量的影响、灯距对固化时间的影响、固化时间对涂膜性能的影响也进行了讨论。     

The effect of graphene oxide on UV curing kinetics and properties of SU8 nanocomposites

In the present study SU8 nanocomposites were prepared by incorporating graphene oxide (GO ), and its effect on the UV curing kinetics, morphology, electrical, hardness and thermal properties of the nanocomposites were investigated at different loading levels of GO (0.1 ? 3 wt%). Studying the reaction kinetics of the UV curing process by means of real‐time infrared spectroscopy showed that the polymerization rate and the final conversion of epoxy groups was related to the loading level of GO in the nanocomposites. An autocatalytic kinetics model of the curing reaction confirmed the effect of GO nanoparticles on the curing rate constant (k ), the order of the initiation reaction (m ) and the ultimate conversion of the UV ‐cured nanocomposites. Appropriate experimental observations indicated that dispersion of GO within the resin plays a critical role on the cure kinetics and final conversion. The results of the kinetics modeling and morphological observations showed that the curing rate constant of the nanocomposites is highly dependent on the GO content and its dispersion state, indicating that GO prevents epoxy resin crosslinking by photoinitator deactivation. Moreover, oxygen functionalities, such as hydroxyl and carboxyl groups, on the surface of GO facilitate interfacial interactions between epoxy groups from the matrix and GO . Electrical conductivity measurements demonstrated that the UV ‐induced photo‐cured GO filled resins are conductive SU8 nanocomposites. It was observed that the thermal stability of the nanocomposites is enhanced due to the dispersion of GO in the matrix. Moreover, the microhardness analysis showed that addition of GO to neat SU8 increases the mechanical hardness of the nanocomposite. © 2016 Society of Chemical Industry     

Silk grafting with methacrylic and epoxy monomers: Thermal process in comparison with ultraviolet curing

Silk grafting with methacrylic and epoxy monomers was studied with the aim to obtain high graft yields. With both monomer types optimum operating conditions of thermal grafting in water bath were established. In particular, three epoxy monomers were tested at various concentrations, at different temperatures and reaction times, with sodium chloride or sodium thiosulphate as catalysts. Optimum yields (76–82%) were found with Araldite DY‐T for 2 h at 70°C with 3M sodium chloride. The results were compared with those obtained with the same monomers by UV curing, radical with methacrylates and cationic with the epoxy resin. The UV curing efficiency was tested by gel content determinations. Thermal and UV cured fibers were then subjected to measurements of fibroin solubility in ethanol–calcium chloride–water mixture to evaluate the crosslinking degree. Except in the case of methacrylamide, radical UV curing yielded fibers more crosslinked than thermal treatment, or crosslinked to the same extent, whereas cationic UV curing showed lower crosslinking effects. The grafted fibers were characterized through DSC measurements and FTIR‐ATR spectrometry. Finally, surface morphology of UV‐cured samples was investigated through SEM analyses which showed that the better products could be obtained with UV curing at low add‐on, mainly with dimethacrylates and Araldite DY‐T, whereas the thermal grafting seems to be preferable for high add‐on. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Preparation and properties of heat and ultraviolet‐induced bonding and debonding epoxy/epoxy acrylate adhesives

Heat and ultraviolet (UV)‐induced bonding and debonding (BDB) adhesives were designed and prepared through blending an epoxy resin, diglycidyl ether of bisphenol A (DGEBA) with an epoxy acrylate resin, bisphenol‐A epoxy acrylate resin (BEA). The variation of the chemical structure of DGEBA and BEA in the sequential heat‐ and UV‐curing processes was characterized by Fourier transform infrared spectroscopy (FTIR). The FTIR results indicate that DGEBA and BEA successfully took part in both the heat‐curing and UV‐curing processes. The effects of the mass ratio of BEA to DGEBA, amount of heat‐curing agent, type of diluents, and UV irradiation time on the BDB properties of BDB adhesive were systematically investigated. The results show that the bonding strength increases with the decrease of the mass ratio of BEA to DGEBA and with the increase of the amount of heat‐curing agent in a certain range. The debonding strength decreases with the increase of the mass ratio of BEA to DGEBA. The mass ratio of BEA to DGEBA was set at 10 to ensure the ratio of the bonding strength to debonding strength greater than 10 times. The debonding strength of BDB adhesives also depends on the UV irradiation time, decreasing with the increase of UV irradiation time in a certain range. Based on the FTIR results and the dependence of the bonding and deboning strengths on the reaction conditions, a possible BDB mechanism of BDB adhesive was proposed. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46435.     

UV固化水性环氧树脂的合成研究

对紫外光固化水性环氧树脂的合成工艺进行了研究,讨论了反应温度、反应时间、催化剂种类和用量,阻聚剂、羧基含量及固含量、中和剂等对水性环氧丙烯酸酯的合成和性能的影响。结果表明,合成环氧丙烯酸酯的最佳反应温度110℃,环氧丙烯酸酯与马来酸酐的最佳反应反应温度为80℃。反应时间均为5 h,三乙胺作催化剂,用量为反应物总质量的0.5%,对羟基苯甲醚作阻聚剂。实验表明,提出的紫外光固化水性环氧树脂的合成工艺可行,合成树脂具有水性特征,性能指标可以满足应用要求。     

木质地板用环氧树脂粉末涂料研究进展

对木质地板用环氧树脂粉末涂料的研究进展进行分析。主要从三个研究方向即UV固化环氧粉末涂料、双重固化体系和对传统环氧树脂粉末涂料及其固化剂的改性,对木质地板用环氧粉末涂料低温固化技术进行了探讨。     

紫外光固化EA树脂的研制

环氧树脂和丙烯酸在适宜条件下合成EA树脂。讨论了各种反应条件对EA树脂性能的影响。确定了最佳工艺条件 :催化剂A用量 1% ,阻聚剂B用量 1‰～ 3‰ ,在 10 0℃滴加丙烯酸 1 0h～ 1.5h ,滴加完后在 110℃反应约 0 5h ,丙烯酸与环氧树脂的摩尔比为 1 0 4∶1。