环氧改性丙烯酸涂料的研制

采用特定的催化剂，制得环氧改性丙烯酸树脂，由其配制的环氧改性丙烯酸涂料既可作为装饰性面漆，也可作为中涂漆。介绍了环氧改性丙烯酸树脂及其涂料的制法和性能指标。通过红外光谱表征了环氧改性丙烯酸树脂的组成和结构。讨论了诸种因素对涂料性能的影响。     

瓶盖用光油的研制

用环氧改性丙烯酸树脂和丁醚化氨基树脂制备瓶盖用光油。讨论了环氧改性丙烯酸树脂、氨基树脂及蜡粉的选择。     

环氧改性丙烯酸树脂的合成研究

立足于现有科研成果,以实验进一步说明了应用顺丁烯二酸酐改性环氧丙烯酸树脂所具有的优势,提出环氧改性丙烯酸树脂的合成受反应时间、温度、催化剂、阻聚剂和光固化剂等因素的影响。     

新型快干水性丙烯酸改性环氧酯树脂的研制

用丁烯酸改性环氧酯树脂,采用接枝共聚的方法引入亲水单体,再用丙烯酸酯类单体对其进行改性,制得新型快干水性丙烯酸改性环氧酯树脂。研究了改性环氧酯树脂、引发剂(过氧化苯甲酰)、丙烯酸单体的用量和接枝共聚合时的反应温度和反应时间这5个因素对树脂性能的影响。     

高附着力单组分环氧改性丙烯酸涂料的制备

以常用丙烯酸单体为主要原料,加入顺丁烯二酸酐,合成出侧链带有酸酐基团的丙烯酸树脂,再与环氧树脂反应,制得环氧改性丙烯酸树脂。由其制备的单组分环氧改性丙烯酸涂料对玻璃等难附着基材具有优异的附着力。考察了环氧树脂的不同用量对树脂体系相容性及漆膜物理性能的影响,结果表明:环氧树脂用量在15%左右时,改性树脂保留了丙烯酸树脂涂料的优异性能,而且附着力、硬度、光泽得到了提高,丰满度佳。     

环氧改性丙烯酸树脂的合成

以甲基丙烯酸甲酯、苯乙烯、丙烯酸酯等为单体，过氧化苯甲酰为引发剂，环氧树脂为改性剂，经聚合得到热固性环氧改性丙烯酸树脂。介绍了环氧改性丙烯酸树脂的合成及生产工艺过程，讨论了各种影响因素。     

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。     

水性环氧改性丙烯酸防火磁漆的制备

以丙烯酸、丙烯酸丁酯、甲基丙烯酸甲酯、丙烯酸2,4,6-三溴苯酯和环氧树脂（E-44）等为原料合成了水性环氧改性丙烯酸树脂,讨论了丙烯酸2,4,6-三溴苯酯的含量对涂层阻燃性能的影响,E-44、丙烯酸的含量以及中和度对水性环氧改性丙烯酸树脂性能的影响。讨论了阻燃助剂等对涂层阻燃性能的影响。     

丙烯酸型F-44光敏酚醛环氧树脂的合成

以溴化四丁基铵作催化剂，用丙烯酸改性F-44环氧树脂，合成了一种既含有丙烯酸基又含有环氧基的光敏酚醛环氧树脂。研究了丙烯酸基的引入量对树脂光学性能、力学性能等的影响。结果表明，当改性树脂中的丙烯酸基与环氧基之比等于1：1时，所制得的树脂具有优良的光化学活性，用改性树脂制成的漆膜具有优良的力学性能、耐溶剂性能和耐酸碱性能。     

环氧磷酸酯树脂改性丙烯酸乳液的合成

采用乳液聚合法制备了环氧磷酸酯树脂改性丙烯酸乳液,研究了乳化剂用量、引发剂用量、环氧磷酸酯树脂用量、功能性单体用量、软硬单体配比对乳液性能的影响。结果表明:当乳化剂用量为3.0%、引发剂用量为0.6%、环氧磷酸酯树脂用量为15.0%、甲基丙烯酸用量为2.0%、软硬单体配比为1∶1时,能得到各项性能良好的环氧磷酸酯树脂改性丙烯酸乳液。     

Structure and properties of epoxy resins modified with acrylic particles

The morphology and material properties of dicyandiamide (DICY)‐cured epoxy resins modified with acrylic particles consisting of a PBA (polybutyl acrylate) core and a PMMA (polymethyl methacrylate) shell and epoxy resins modified with acrylic rubber (PBA) particles alone were studied. It was found that the epoxy system modified with core/shell acrylic particles showed higher fracture toughness, indicating that the modification had a larger effect on improving the material properties of the epoxy resin. A characteristic shown by the core/shell acrylic particles is that they swell along with the epoxy resin under exposure to heat and gel before the latter cures. In this process, the epoxy resin penetrates the surface of the shell layer and a bond is formed between the epoxy matrix and the core/shell acrylic particles. This suggests that the epoxy matrix around the core/shell acrylic particles has the effect of increasing the level of energy absorption due to plastic deformation of the matrix. This is thought to explain why the epoxy resin modified with core/shell acrylic particles showed higher fracture toughness. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2955–2962, 1999     

改性咪唑类潜伏性环氧树脂固化剂的制备

由丙烯酸、甲基丙烯酸甲酯、丙烯酸丁酯等的共聚反应制备了有一定亲水性的丙烯酸树脂，然后利用制备的丙烯酸树脂对咪唑和2-乙基-4-甲基咪唑进行改性制备具有一定潜伏性的环氧树脂固化剂，该固化剂可以和环氧乳液进行复配，具有较好的相容性，可制备出单组分丙烯酸树脂环氧树脂铝箔涂覆材料，该材料涂覆于铝箔表面，可获得光滑致密耐腐蚀的涂膜。     

水性碳纳米管接枝改性环氧树脂的合成

用酸氧化法对多壁碳纳米管(MWNTs)进行羧化处理后引入酰氯基团,利用酰氯基团与环氧酯聚合物中的羟基进行缩聚反应将MWNTs接枝到环氧树脂结构中,合成得到碳纳米管接枝改性的环氧酯聚合物。该聚合物与丙烯酸单体进行自由基聚合,在聚合物中引入羧基,利用羧基与有机胺中和成盐,制得水性碳纳米管接枝改性环氧酯聚合物。对聚合物进行红外光谱和透射电镜分析表明,碳纳米管与环氧酯聚合物进行了接枝反应。     

环氧丙烯酸树脂合成条件的优化

用双酚A环氧树脂与丙烯酸反应合成环氧丙烯酸树脂。利用正交试验研究了反应温度、催化剂种类和用量、阻聚剂用量对合成反应的影响,得到了合成反应的优化条件。用FTIR对环氧树脂和合成的环氧丙烯酸树脂的结构进行了表征。     

Elastomers Formed In-Situ in Epoxy Resins: Chemistry and Toughening

The chemistry of the in-situ formation of elastomer particles in epoxy resins is described. Under normal synthetic conditions, if one polymerizes an acrylic monomer in an epoxy resin, the resulting polymer is soluble in the epoxy resin or it grossly phase separates, depending upon the solubility parameter difference between the acrylic polymer and the epoxy resin. This work shows that with the use of a specifically tailored material (which we believe operates as a “polymeric surfactant”) in the reaction mixture, a free-flowing, stable suspension of acrylic elastomer particles in epoxy resin can be obtained. Thus, the reaction product of isocyanatoethylmethacrylate and EPON^TM 1009 can be used as the polymeric surfactant in a reaction mixture containing hexyl acrylate, azo-bis(isobutyronitrile) and the diglycidyl ether of bisphenol A. The resulting dispersion is stable to settling even after exposure to 150°C. When properly formulated, the resulting modified epoxy resins are improved in their fracture resistance after cure over a similar resin without the elastomeric particles. The effect of the following parameters on the fracture resistance of the cured epoxy resin are discussed: chemistry of the polymeric surfactant, chain extension in the cure of the epoxy resin, type of acrylic monomer and the level of the elastomer. The physical properties of several adhesive formulations based upon these modified epoxy resins are also discussed.     

Preparation and mechanism of free-radical/cationic hybrid photosensitive resin with high tensile strength for three-dimensional printing applications

A ultraviolet (UV)-curing free-radical/cationic hybrid resin is designed and developed by blending epoxy resin with an acrylic resin, including N-acryloyl morpholine, polyurethane acrylic ester (PUA), free-radical and cationic photoinitiator. During UV-curing, crosslinking locks the acrylate and epoxide polymers together through non-covalent interaction. Most likely, the interpenetrating polymer network (IPN) structure can be generated in the three-dimensional (3D)-printed objects. The obtained results from Fourier transform infrared spectroscopy (FT-IR) show that bisphenol A epoxy resin and acrylic resin are both successfully involved in the UV-curing process. In addition, the effects of the mass ratio of epoxy to acrylic resin and the UV irradiation time on the properties of the hybrid resin are systematically investigated using liquid crystal display (LCD) 3D printers. It is found that the tensile strength of the hybrid resin increases in a certain range and the elongation at the break maintains an upward trend with the increasing mass ratio. Finally, it is found that the shrinkage of the hybrid resin also depends on the mass ratio of epoxy to acrylic resin, which decreases with the increase of the epoxy resin content in a certain range. Thus, herein we propose a feasible UV-curing mechanism for the synthesis of hybrid resins for 3D printing applications.     

金属罐用热固性丙烯酸树脂的研制

用环氧树脂和丙烯酰胺反应,形成环氧酰胺树脂后,再与丙烯酸及其衍生物、苯乙烯等单体用自由基溶液聚合方式,将环氧接枝到丙烯酸树脂上。通过研究确定了树脂合成的最佳工艺,讨论了各种因素对涂料性能的影响。     

光固化涂料用低粘度环氧丙烯酸酯的研究

采用双羟基化合物与环氧树脂进行反应,制取低粘度改性环氧树脂,然后用丙烯酸酯化,制得光固化涂料用低粘度环氧丙烯酸酯。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、不同链长双羟基化合物和双羟基化合物与环氧树脂当量比对环氧丙烯酸酯粘度及其配制的光固化涂料的性能影响。确定了环氧树脂改性反应和丙烯酸酯化反应的最佳条件。