低粘度紫外光固化竹木基涂料的研制

用一缩二乙二醇与E-44环氧树脂反应,得到的改性环氧树脂再与丙烯酸反应,制备了适于配制竹木基涂饰的紫外光固化的改性环氧丙烯酸酯预聚物。讨论了催化剂种类对环氧树脂转化率及产物粘度的影响,催化剂用量对改性环氧树脂丙烯酸酯化的影响,及光引发剂种类对固化速度的影响。最终制得的改性环氧丙烯酸酯光固化涂料比改性前的性能良好。     

四氟硼酸二芳基碘鎓盐的合成及其表征

本文合成了四氟硼酸二芳基碘鎓盐阳离子紫外光引发剂，并且从红外、核磁、紫外光谱以及熔点测定进行了表征。结果表明，该合成方法的产率达58%，接近国外文献报道产率。     

低气味UV光固化木器涂料的制备

通过结合欧盟RoHS指令中测试项目及标准限值、REACH法规和生产实践,对家具(UV)紫外光固化涂料做了大量的技术研发工作,通过对树脂、光引发剂等原料的筛选,研制了低气味UV光固化木器涂料。     

3D打印用光固化树脂产品性能研究

针对目前光固化（SLA）树脂的市场需求,采用双酚A环氧丙烯酸酯、二丙烯酸酯、三丙烯酸酯及光引发剂进行复配,制备硬质紫外SLA树脂产品,通过电子万能材料试验机、平板流变仪、电子比重计等对组分含量不同的SLA树脂材料的力学性能、黏度、体积收缩率等进行了测试,确定了产品配方,并用该配方SLA树脂进行了SLA 3D打印。结果表明,较合适的SLA树脂的配方为2 mol低聚物双酚A环氧丙烯酸酯、20 mol活性稀释剂及适量光引发剂,采用该配方制得的SLA树脂黏度为240.8 mPa?s,拉伸强度为47.1 MPa,断裂伸长率为5.62 %,体积收缩率为4.44 %,所制备的产品表面光滑、性能优异。     

水溶性光敏引发剂2-羟基-1-[4-(2-羟乙氧基)苯基]-2-甲基-1-丙酮

介绍了一种水溶性光敏引发剂２－羟基－１－［４－（２－羟乙氧基）苯基］－２－甲基－１－丙酮的新的合成方法,作了光谱、波谱分析,该引发剂特别适用于乳液型或胶乳型水溶性体系中的不饱和化合物的光聚合反应。新合成方法是将中间产物在四氯化碳介质中溴化,然后进行甲醇钠催化水解     

新型紫外线固化环氧树脂/丙烯酸酯改性水性聚氨酯的合成与性能

合成了一种新型的具有高交联密度和优异涂膜性能的环氧树脂和丙烯酸酯同时改性的紫外线（UV）固化水性聚氨酯（UV-EP-AC-WPUD）。通过环氧基团与以异氰酸酯基团（-N=C=O）封端的聚氨酯预聚体之间的反应引入质量分数为4%的环氧树脂E-20。同时,通过聚氨酯链的-N=C=O与二元丙烯酸酯（PEDA）以及季戊四醇三丙烯酸酯（PETA）的羟基之间的反应引入碳碳双键（C=C）,C=C的含量达到4.65 meq·g-1。 质量分数为3%的光引发剂Irgacure 2959被用于引发涂膜中C=C的聚合,涂膜的凝胶含量在12 s UV辐射之后达到91%,意味着C=C的聚合和交联速度快,同时所得到的涂膜的交联度非常高,不溶于溶剂丙酮,测试表明环氧树脂和两种丙烯酸酯单体已经成功嵌入聚氨酯链中,涂膜具有优异的力学性能和化学性能。     

New photochemical approach to cellulose fabric and photoinitiator system

The surface modifications of cellulose substrate based on the photo‐induced reaction are closely related with the radicals introduced on the surface of cellulose substrates by light irradiation. We have evaluated the ability of radical formation in lyocell fabric and two water‐soluble photoinitiator systems by using photoluminescence analyses. Namely, the relative quantum yields of fluorescence and phosphorescence were estimated by the integrated emission intensity under the same values of light absorbance and the identical measuring conditions. First of all the [2‐(acryloyloxy)ethyl](4‐benzoylbenzyl)dimethylammonium bromide (PIA) system had larger UV absorbance values below 287 nm than [3‐(3,4‐dimethyl‐9‐oxo‐9h‐thioxanthene‐2‐yloxy)‐2‐hydroxypropyl]trimethylammonium chloride (PIB) system at the same concentration. The relative quantum yields of fluorescence and phosphorescence emission in PIA system were smaller than those in PIB system even if the two systems had the same values of light absorbance. Therefore it was found that the PIA system was more easily transited to the triplet‐state and the transited molecules reacted with the cellulose substrates more effectively. The modified cellulose fabric with 2‐(dimethylamino)ethyl chloride hydrochloride (AM1) and PI system had only a little different UV absorbance and photoluminescence properties from the untreated fabric system. However, the fabric modified with 2‐(4‐chlorophenyl)‐ethylamine (AM2) and PI system showed relatively big differences. The UV absorbance values were increased and the relative quantum yields of photoluminescence were decreased remarkably. We have acquired that the tertiary amine treated cellulose fabric were very effective in photo‐induced modification of cellulose. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

脂环族环氧树脂的光固化研究进展

介绍了脂环族环氧树脂的光固化,包括光引发剂的种类及其特点,新型脂环族环氧树脂,光固化影响因素最新研究进展。     

Non-visible print set-off of photoinitiators in food packaging: detection by ambient ionisation mass spectrometry

Direct analysis in real time coupled to time-of-flight mass spectrometry (DART/TOF-MS) was used to detect the non-visible set-off of photoinitiators on the food contact surface of three different packages. The samples were intentionally under-cured to provoke set-off. Twelve commercially available photoinitiators were included in the ink formulations including α-amino-, morpholino, and α-hydroxy benzophenones, thioxanthones, aryl-phosphine oxide and three polymeric versions of these. Major colours of the packages’ prints were analysed, as well as the specific areas of the inner surface in contact with them. Larger quantities of photoinitiators were detected on the food contact areas in contact with the darker colours of the images. Speed-cure 7005 and 4-phenylbenzophenone were the compounds most susceptible to set-off in each of the samples by DART response. An identification protocol for unknown set-off compounds was tested, resulting in the set-off detection of diethylene glycol ethers, erucamide and acrylates, and confirmed by solvent extraction GC-MS analysis. Finally, DART/TOF-MS was scanned across transects of the food contact side of packages to map the presence of photoinitiators. Higher photoinitiator signals were observed in patterns corresponding to the printed image, suggesting DART/TOF-MS might “image” print set-off.     

新型阳离子光固化剂双[(4-二苯硫鎓)苯]硫醚-双-六氟磷酸盐的合成

以二苯硫醚为主要原料,以过氧化氢为氧化剂,在室温条件下氧化得到了二苯亚砜.然后,二苯亚砜与二苯硫醚在硫酸的作用下,进行缩合反应制备了双[(4 二苯硫)苯]硫醚 双 六氟磷酸盐,收率由文献报道的39%提高到75%;对其结构进行了UV、IR、H NMR和元素分析.