共查询到20条相似文献,搜索用时 109 毫秒
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聚乙二醇改性环氧丙烯酸酯光固化树脂的研究 总被引:4,自引:0,他引:4
采用双羟基化合物聚乙二醇对环氧树脂进行改性,制取低黏度的改性环氧树脂,再用丙烯酸酯化,制得低黏度的环氧丙烯酸酯预聚物.研究了聚乙二醇400与环氧树脂的物质的量比、催化剂类型及用量、阻聚剂类型及用量、反应温度、反应时间及酸物质的量与环氧物质的量的比值对反应及产物性能的影响,确定环氧树脂改性反应和丙烯酸酯化反应的最佳条件,同时对树脂固化性能进行了研究. 相似文献
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采用改性E-12环氧树脂与丙烯酸反应,用SA230作催化剂,制备了适于配制木基涂饰的高固体份紫外光固化的改性环氧丙烯酸酯预聚物,对其合成条件进行探索,同时研究了光引发剂种类对固化速度以及固化时间对涂膜性能的影响,对产物进行了红外表征,得到了光固化的优选条件。 相似文献
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综述了3D打印用光敏树脂研究进展及其在装饰性雕塑中的应用。使用环氧丙烯酸酯制备光敏树脂过程中,添加1.0%(w)的膨胀微球和0.1%(w)的聚醚多元醇可以提高光固化后树脂的强度和韧性。使用异佛尔酮二胺改性聚氨酯丙烯酸酯合成光敏树脂的过程中,添加异氰酸酯表面改性纳米SiO_(2)得到的光敏树脂黏度适中。利用异氰酸酯封端中间产物与丙烯酸羟乙酯合成的含有亚胺基聚氨酯丙烯酸酯预聚物,可以制备具有自修复性能的聚氨酯光敏树脂。 相似文献
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UV固化环氧丙烯酸酯涂料研究进展 总被引:3,自引:0,他引:3
综述了UV固化环氧丙烯酸酯的合成与改性,介绍了反应温度、原料配比、催化剂及阻聚剂的影响;改性主要是针对降低黏度,增加柔韧性,提高耐热、阻燃等性能。介绍了光引发剂及活性单体的研究进展,最后对光固化技术的发展趋势进行了展望。 相似文献
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用液态含羧基丙烯酸酯低聚物改性环氧树脂 总被引:6,自引:0,他引:6
采用溶液聚合法合成了以丙烯酸丁酯、丙烯腈为主链结构的液态含羧基丙烯酸酯低聚物,用其对环氧树脂进行增韧改性,讨论了丙烯腈、丙烯酸以及丙烯酸酯低聚物质量分数对改性环氧树脂力学性能的影响,并研究了改性环氧树脂的微观形态和动态力学性能。结果表明,丙烯酸酯低聚物质量分数为5%时,丙烯酸丁酯/丙烯腈/丙烯酸(质量比)为75/20/5的改性环氧树脂的拉伸强度比纯环氧树脂提高4.3%;丙烯酸酯低聚物质量分数为10%时,该改性环氧树脂的冲击强度比纯环氧树脂提高近4倍,同时体系的耐热性能保持不变;环氧树脂改性体系呈两相结构,丙烯酸酯低聚物质量分数达到30%时,对环氧树脂的增韧效果变差;随着丙烯酸酯低聚物质量分数的增加,改性环氧树脂的玻璃化转变温度先升高后降低,其质量分数不超过10%时,改性环氧树脂的玻璃化转变温度高于纯环氧树脂。 相似文献
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Water soluble, photocrosslinkable prepolymers were synthesized from epoxy phenolic resin (epoxy novolak resin) via ring‐opening reaction with acrylic acid, followed by ring‐opening reaction with aqueous solution of triethylamine hydrochloride. No phase transfer catalyst was needed to accelerate the second reaction, since the product formed can act as a phase transfer catalyst. The prepolymer obtained contains both photocrosslinkable acrylate groups and hydrophilic quaternary ammonium salt groups. Optimum conditions for these reactions were studied. The photosensitive properties of the prepolymer were also investigated. The effect of different photoinitiators, different crosslinkable diluent monomers and amine accelerator on the photosensitive properties of the prepolymer were compared. The photoinitiator of hydrogen abstraction type is still effective without using amine or alcohol as accelerator, because the prepolymer contains αH beside the OH groups formed in the ring‐opening reactions. 相似文献
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密封胶用环氧改性丙烯酸树脂生产工艺的研究 总被引:1,自引:0,他引:1
以甲基丙烯酸甲酯为硬单体,丙烯酸丁酯为软单体,丙烯酸为功能单体,环氧树脂为改性剂制备了密封胶用环氧改性丙烯酸树脂。讨论了环氧树脂的类型及用量,溶剂的种类,反应的温度,溶剂和相对分子质量调节剂的选择,确定了适宜于制备密封胶用环氧改性丙烯酸树脂的反应条件及最佳的配方。 相似文献
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Vikash Mishra Jatin Desai Kalpesh I. Patel 《Journal of Coatings Technology and Research》2017,14(5):1069-1081
Synthesis, characterization, and film performance of waterborne thiol–acrylate/thiol–epoxy hybrid coatings are highlighted in this article. A dimer acid-modified epoxy (DME) polyol, containing both hydroxyl and epoxy functional groups, was prepared by reacting epoxy resin (EEW = 190 g/equi) with dimer fatty acid at 2:1 molar ratio. Further, a base UV-curable polyurethane acrylate dispersion (UV-PUD), with a pendant epoxy functional group, was prepared by reacting polyol (DME), isophorone diisocyanate, and dimethylol propionic acid and end-capped with hydroxyethyl methacrylate with subsequent dispersion in water. Prepared intermediates were characterized for the parameters relevant to the study by physical, spectroscopic, and chemical methods. UV-curable thiol–acrylate/thiol–epoxy hybrid coatings were prepared by blending UV-PUD with trimethylolpropane tris(3-mercaptopropionate) (TMPMP) at four different thiol ratios (0, 0.3, 0.6, and 1.0) with respect to acrylate/epoxy groups. Cured films of the hybrid coating were identified by FTIR spectroscopy. The impact of thiol ratio on film performance was evaluated in terms of mechanical, chemical, thermal, and coating properties. The gel content measurements confirm that the addition of TMPMP increased the double bond conversion along with the epoxy group. Evaluation of cured samples shows the significant improvement in storage modulus, glass transition temperature, tensile strength, and hardness with increase in thiol ratio. The cured films possessed excellent water and acid resistance (<4%) even after 28 days of immersion. Moreover, the notable improvement was alkali resistance of cured films, i.e., as thiol ratio was increased from 0 to 1, weight loss in alkaline environment deceased from 49.5 to 4.5% after 28 days. Better properties of the thiol–acrylate/thiol–epoxy hybrid films will allow it as a potential application in low-volatile high-performance coatings. 相似文献
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Jianfeng Yu Hongxia Pan Xiaodong Zhou 《Journal of Coatings Technology and Research》2014,11(3):361-369
In this paper, a series of waterborne acrylic-modified epoxy hybrid dispersions were synthesized and successfully used as primers for coil coatings. Epoxy was phosphated to improve its adhesion to the metal substrate. The grafting reaction of acrylate monomers onto the high molecular weight epoxy resins was studied with infrared spectroscopy, differential scanning calorimetry, and nuclear magnetic resonance. The structure and resin molecules were found to be as expected and the film had the best performance when the acrylate monomer made up less than 40 wt% of the epoxy resin. Modification of the epoxy with phosphoric acid could increase the adhesion to the metal substrate. Better adhesion was achieved with greater amounts of phosphoric acid. R578 urea resin was found to be the most suitable for crosslinking of the resin in this system, and a paint film based on the resulting resin had excellent overall performance. 相似文献