发展中的光纤保护性涂料

本文对发展中的光纤保护性涂料进行了介绍，重点介绍了热固化和紫外光固化两大类光纤涂料的固化原理、组成特性、涂覆工艺及主要性能。     

气相二氧化硅对紫外光固化光纤涂料性能的影响

用聚氨酯丙烯酸酯与环氧丙烯酸酯预聚物按一定比例共混制备出性能较好的紫外光固化光纤涂料。着重研究了气相二氧化硅填料的加入对光纤涂料性能的影响。研究发现：气相二氧化硅填料的适量加入能有效降低涂料的吸水性,而对涂料的光固化速度等性能无明显的影响。此外,还探讨了聚合物涂层中气相二氧化硅微粒改善光纤疲劳与老化性能的作用机理,发现2％（质量分数）的气相二氧化硅填料使氧合物涂层的吸水率最小,从而降低光纤表面的侵蚀速率。     

颜料对紫外光固化光纤涂料性能的影响对紫外光固化光纤涂料性能的影响

用聚氨酯丙烯酸酯与环氧丙烯酸酯预聚物按一定比例共混,制备紫外光固化光纤涂料,加入颜料制得着色光纤涂料.研究了颜料的类型及加量对光纤涂料性能的影响,试验结果表明:颜料的类型对光纤涂覆速度影响很大,而对其他性能影响较小.     

颜料对紫外光固化光纤涂料性能的影响

用聚氨酯丙烯酸酯与环氧丙烯酸酯预聚物按一定比例共混,制备紫外光固化光纤涂料,加入颜料制得着色光纤涂料。研究了颜料的类型及加量对光纤涂料性能的影响,试验结果表明;颜料的类型对光纤涂覆速度影响很大,而对其他性能影响较小。     

UV固化涂料固化速度的影响因素

综述了光引发剂、单体、预聚物、颜料等因素对紫外光固化涂料固化速度的影响，及其研究方向。     

紫外光固化丙烯酸酯亚光涂料

本文研究了以聚丙烯接枝共聚物为消光剂的紫外光固化丙烯酸酯亚光涂料。讨论了聚丙烯妆枝物的用量，接枝率对涂膜光泽，灯距对固化时间及涂膜光泽的影响。用扫描电子显微镜及偏光显微镜观察涂膜的结构及形态。所得涂膜硬度高，手感好，涂膜均匀，透明，而且具有耐水，耐酸碱性。     

UV固化低折射率光纤涂料的研制

研制的紫外光固化低折射率光纤类涂料由乙烯基聚硅氧烷、巯基聚硅氧烷、丙烯酸氟硅聚合物、光引发剂及助剂等组成。该涂料折射率小于1.40,固化速率小于0.3 s,吸水率低,拉伸强度为1.58MPa,伸长率为163%,适用温度范围为-60～200℃,可用于双包层石英光纤的外层以及光固化电连接器等方面。     

紫外光固化系统对光纤光缆涂层固化效果的影响

从紫外光固化系统方面讨论了影响紫外光固化涂层固化效果的因素,分析了紫外光发射光谱、紫外光强度、紫外光剂量、红外辐射热效应和反射面及其能量分布对光纤光缆涂层固化效果的影响。     

Synthesis and characterization of UV-curable waterborne polyurethane–acrylate ionomers for coatings

A new kind of ultraviolet (UV)-curable waterborne polyurethane–acrylate (PUA) ionomer, prepared from toluene diisocyanate (TDI), polyethylene glycol (PEG), dimethylolpropionic acid (DMPA), triethylamine (TEA), and 2-hydroxyethyl methacrylate (HEMA), was synthesized by the modified prepolymer mixing process in which water serves as a chain-extender and dispersant. Fourier transform infrared (FTIR) spectra demonstrated the formation of the PUA ionomers both in dispersions and in their corresponding cured films. Surface tension of the PUA dispersions decreased as the DMPA-to-PEG mole ratio increased. The investigation of rheological behavior of the PUA dispersions suggested that all the dispersions belong to pseudoplastic fluid and display the characteristic of common polymer dispersions. Differential scanning calorimetry (DSC) analysis showed that the increasing DMPA-to-PEG mole ratio may result in a higher T_g and a broader transition zone for the hard segment. The results of TGA for the PUA-cured films indicated good thermal stability with no appreciable weight loss until well above 200°C. Measurement of physical properties showed that all the PUA-cured films exhibited excellent adhesion, gloss, flexibility, and impact strength, as well as pendulum hardness, depending upon hard segment content. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2869–2876, 1999     

光缆加强筋用紫外光/热固化浸胶

以双酚A环氧树脂（E-44）、丙烯酸（AA）为原料,N,N’-二甲基苯胶和三乙胺为混合催化剂合成了环氧单丙烯酸酯齐聚物（EA）;以EA、安息香二甲醚（Irgacure651）、复合稀释剂和其他助剂为组份配制了光缆加强筋用紫外光／热固化浸胶。通过实验结果的比较分析对浸胶配方作了优化改进。     

Use of laser spallation to measure the adhesion of optical fiber coatings

The correlation between chemical effects of some typical optical fiber coating formulations and adhesion to glass was studied by the use of laser spallation. The technique was able to show verifiable differences between dissimilar materials and demonstrated a good correlation to adhesion values determined by mechanical peel testing, and to pullout values measured on coated optical fiber. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2459–2468, 2004     

粉末涂料的一些经济信息

简短介绍了粉末涂料最新进展，并包括异氰脲酯三缩水甘油酯替代物和紫外光固化粉末涂料等。     

紫外光固化环氧聚硅氧烷树脂的制备与性能

以1,2-环氧-9-癸烯和双侧氢封端的聚二甲基硅氧烷为反应物,在卡斯特催化剂〔铂(0)-1,3-二乙烯-1,1,3,3-四甲基二硅氧烷〕的催化下发生硅氢加成反应,成功制备了环氧基聚硅氧烷预聚物,并使用阳离子型光引发剂对其进行紫外光固化,制得紫外光固化环氧聚硅氧烷树脂。对合成双端环氧基聚硅氧烷预聚物的反应条件进行优化。利用FTIR和1HNMR对所合成预聚物的结构进行了结构表征,采用热失重分析、差示扫描量热法、接触角、耐碱性、耐醇性、凝胶率、邵氏A硬度和断裂面微观形貌对固化膜的性能和形貌进行了测试。结果表明：在反应温度为75 ℃、催化剂有效成分添加量为0.009‰（以双端含氢聚硅氧烷和1,2-环氧-9-癸烯的质量和为基准,下同）条件下,8 h时反应程度达93.95%;当使用光引发剂BL9380用量为3%（以预聚体质量为基准,下同）、固化时间为20 s时,制得的树脂表面活性能为18.4~18.8 mN/m,耐碱性、耐醇性良好,凝胶率为93.9%,邵氏A硬度为37,空气气氛下两个最大分解速率分别为437.6和511.3 ℃,780 ℃下质量残余率为13.9%,固化膜的综合性能最好。     

紫外光固化卷材涂料的研制

紫外光固化涂料由于固化速度快、体积收缩大,故通常存在与金属基材附着力差的问题。以多官能脂肪族聚氨酯丙烯酸酯和双酚A环氧丙烯酸酯作为预聚物、甲基丙烯酸羟乙酯作为活性单体、磷酸酯作为附着力促进剂,研究了涂料体系各组分配比及固化时间对涂膜性能的影响。     

Flame retardancy and thermal property of novel UV-curable epoxy acrylate coatings modified by melamine-based hyperbranched polyphosphonate acrylate

A novel melamine-based hyperbranched polyphosphonate acrylate (MHPA), successfully synthesized via the Michael addition polymerization of 2-(2-amino-ethylamino)-4,6-bisethylamino-1,3,5-triazine with tri(acryloyloxyethyl) phosphate, was blended with the epoxy acrylate (EA) to prepare UV-cured flame retardant coatings. The study of their flammability revealed that MHPA can improve the flame retardancy and the sample with 45 wt% MHPA (EA3) showed a good intumescent behavior when combusted. The results of their thermal degradation displayed that MHPA had a dual effect on the thermal stability of EA: leading to its earlier degradation catalyzed by acidic species from the relatively weak phosphorus-bearing parts, but improving the thermal stability of the char layer at high temperature due to the formed intumescent phosphorus–carbon compounds. Besides, the total release amount of gas products of EA3 was much lower than that of pure EA and various flammable gases like hydrocarbons and highly toxic CO were also reduced     

中国辐射固化涂料的发展与现状

从辐射固化涂料的市场结构、原材料(树脂及单体)生产状况、在木器、塑料及印刷品包装行业的应用等方面介绍了我国辐射固化涂料行业的现状,并提出我国辐射固化涂料行业将向标准化、高性能化、双重固化、无溶剂化及水性化发展。     

Nanoclay dispersion effects on UV coatings curing

Clay-based nanocomposites have already shown their great potential. In this study, clay–acrylate nanocomposite formulations, for wood finishes, were prepared in four differents ways. High-speed mixing, ball milling, bead milling and three roll milling were used to disperse clay into the neat acrylate formulation. The viscosity of the formulations was determined. Small angle X-ray scattering and transmission electron microscopy experiments were performed on these samples in order to study the quality of the dispersion. Then, photo-calorimetry and real-time infrared spectroscopy were used in order to investigate the effects of clay loading and clay dispersion on the ultraviolet curing. These studies have shown that UV curing is related to the quality of clay dispersion. Presence of large clay aggregates decreases the conversion of the acrylate functional groups, even at a small clay loading. However, a small amount of clay, well dispersed, can help UV curing.