辐射固化丙烯酸酯防腐涂料的制备及性能研究

为将绿色环保的辐射固化技术用于制备金属防腐涂料,分别选用了聚氨酯丙烯酸酯、双酚A型环氧丙烯酸酯以及改性双酚A型环氧丙烯酸酯作为涂料的主要成膜物质,选用紫外光（UV）、电子束（EB）2种固化方式以及5种辐照剂量（80 kGy、160 kGy、240 kGy、320 kGy、400 kGy）制备了一系列辐射固化防腐涂层。通过凝胶含量、双键转化率、基础性能、吸水率、电化学阻抗谱测试和盐雾试验探究了不同辐射固化方式和辐照剂量对涂层固化程度以及性能的影响。结果表明：多数情况下EB固化涂层的双键转化率和凝胶含量大于UV固化涂层;辐照剂量越大,涂层的双键转化率和凝胶含量越高;对于分子链刚性较大的树脂体系,辐照剂量过大时会严重影响涂层的附着力,致使涂层耐腐蚀性下降;对于分子链柔性较好的树脂体系,EB固化涂层由于固化程度较高,其耐腐蚀性优于UV固化涂层,且随着辐照剂量增加,涂层硬度、附着力和耐腐蚀性都有所提高;对于分子链柔性适中的树脂体系,EB固化涂层和UV固化涂层都具有较高的固化程度及较强的附着力,两者的耐腐蚀性并没有明显差异。     

热/UV双重固化制备耐划伤光学扩散膜

采用热/UV双重固化方式制备高透光率、高雾度光学扩散膜扩散涂层.分别研究了不同树脂/粒子比例(以热固化树脂为参考)、双重固化树脂比例(UV固化树脂/热固化树脂),以及相同树脂/粒子比例条件下不同粒子粒径等参数对光学扩散膜扩散涂层力学性能、光学性能的影响.对制备的光学扩散膜扩散涂层力学、光学性能及表观形貌进行表征.测试结果表明:使用合适比例的热/UV混合固化树脂,能够制备出具有耐划伤性能且翘曲度较低的光学扩散膜扩散涂层.     

电子束固化复合材料技术

简述了电子束（EB）固化复合材料的特点,介绍电子束固化机理,电子束固化树脂基体性能,复合材料试件及发动机壳体性能及电子束固化技术在航空航天复合材料其他领域的应用前景。     

低能电子束辐射固化涂料的研究

以低能电子束处理多种配方的涂料,研究了辐射剂量、加速电压和氧气浓度对涂料固化性能的影响。结果表明：氧气浓度高于一定程度时将会导致涂层固化困难,辐射剂量对涂膜性能有着直接的影响,较高的加速电压有利于较厚涂层的固化。并对EB固化与UV固化后的涂膜性能进行了对比测试,表明EB固化涂料在性能上存在明显的优势。     

辐射固化和有机硅系杂化涂料简介

紫外线固化涂料（简称UV固化涂料）和电子束固化涂料（简称EB固化涂料）统称辐射固化涂料,由于UV固化涂料的涂装设备投资低,应用推广比EB固化涂料快得多。等离子体固化有着和UV固化相同的机理,它也属于辐射固化。UV固化涂料固化速度快（以秒计）、VOC低、符合环保要求,且效率高和节能,尤其固化时放热少,适合各种对热敏感的材料,如纸张、塑料、木材、皮革等的涂装,所以UV固化涂料发展很快。     

卡纸涂层对EB固化直接真空镀铝工艺的影响

通过改变卡纸涂布量和涂层中瓷土与碳酸钙的比例,研究了卡纸涂层对电子束固化直接真空镀铝工艺的影响。结果表明,随卡纸涂料量提高,表征涂层开放程度的油墨吸收性也随之提高,但卡纸的耐折性能则下降,电子束（EB）固化预涂料涂布量也随之增大;卡纸涂层材料中颜料的组成对卡纸性能及EB固化涂料预涂量有影响,随着颜料中瓷土含量降低,碳酸钙含量提高,涂层的开放程度提高,纸张光泽度下降。     

双马来酰亚胺树脂及其碳纤维复合材料的电子束辅助固化研究

本文详细探讨了活性稀释剂、辐射剂量对双马树脂电子束固化的影响,分析了双马树脂进行电子束固化的机理,并比较了电子束辅助固化双马树脂碳纤维复合材料的机械性能与相应复合材料热固化的机械性能。     

紫外光／电子束固化市场分析

紫外光/电子束(UV/EB)固化在木材、纸张和聚氯乙烯/聚烯烃地板等方面的应用增长速度已经有所减缓,而在电子元件、光纤涂层、压敏胶、宽网柔版印刷油墨、紫外固化粉末涂料等领域中的应用有了快速的发展。本文分析了全球UV/EB固化技术原材料消耗及产品的主要市场状况,侧重分析了欧洲、北美及日本市场,并对UV/EB固化的缺点提出了改进意见。     

UV固化水性聚氨酯丙烯酸酯木器涂料的研究

利用2种软硬程度不同的UV固化水性树脂,对UV固化水性木器涂料的复配及工艺进行研究.探讨了助剂(特别是硅溶胶)对水性木器涂料涂膜性能及施工工艺性等的影响.实验结果表明:UV固化水性木器清漆涂膜硬度高,具有很好的附着性、耐刮擦、耐化学品等性能,适合于工业化生产板材的涂饰.     

紫外光固化聚苯胺防腐涂层的制备与应用

为研制高性能绿色环保光固化防腐涂料,选用木质素磺酸钙（LS）作为掺杂剂,改变 LS与聚苯胺（ PANI）比例得到一系列木质素磺酸钙掺杂聚苯胺（ LS-PANI）,并将其作为防腐填料来制备 UV固化防腐涂料。通过实时红外（ RT-IR）、凝胶含量、电化学阻抗谱（EIS）、耐盐雾测试等比较了 LS与 PANI的质量比及 LS-PANI添加量对光固化涂层固化程度及防腐性能等的影响。结果表明：低于1. 0%的 LS-PANI的引入对光固化过程影响较小; LS对 PANI的掺杂能有效改善 PANI在光固化树脂中的分散性;当 LS与 PANI的质量比为 1∶4时, LS-PANI的添加量为 1. 0%时, LS-PANI在涂层中的分散性最好,制备的光固化涂层防腐性能最佳。     

The Effect of Radiation Dosages and UV/EB Radiation on the Properties of Nanocomposite Coatings

The aim of this study was to compare the effects of ultraviolet (UV) and electron beam (EB) radiation on the properties of cured nanocomposite coatings. Surface hardness increased with increasing radiation dosages (number of passes) for all samples. This was due to the increase in crosslinking with increasing radiation dosages. Pendulum hardness, gel content, and thumb twist results were analyzed to choose the appropriate curing dosage for both curing techniques. The selected dosages were then used to cure coatings for scratch and abrasion resistance tests. It was found that the UV curing produced coatings with better abrasion resistance, whereas EB curing was more suitable for producing scratch-resistant coatings.     

UV curable glycidyl carbamate based resins

The synthesis and characterization of UV curable resins based on glycidyl carbamate chemistry have been explored. Glycidyl carbamate (GC) functional resins have been used to obtain crosslinked coatings with a wide range of properties using several crosslinking techniques such as epoxy-amine, self-crosslinking, and sol-gel. GC resin technology was further expanded to UV curable coatings by reacting polyfunctional GC resins with acrylic acid to yield acrylated glycidyl carbamate (AGC) resins. Alcohol-modified UV curable GC resins were also prepared to obtain lower viscosity. Commonly used reactive diluents were used to prepare a UV curable GC coating formulations. The coatings were cured in air using a Fusion LC6B Benchtop Conveyer with an F300 UV lamp. The degree of conversion of acrylic double bonds during UV curing was determined using real time FTIR and showed that the resins had fast cure rates and high extents of conversion of acrylate groups. Coating properties such as hardness, impact strength, methyl ethyl ketone double rubs, flexibility, and adhesion were studied. Dynamic mechanical analysis was used to determine crosslink density of the coatings. Differential scanning calorimetry and thermogravimetric analysis were used to study the thermal properties of the coatings. The type of polyisocyanates and the extent of modification in GC resins influenced the degree of conversion, crosslink density, and coating performance.     

中国光固化材料生产与市场近况

光固化是一种先进的表面加工技术,其配方产品（如涂料、油墨和胶黏剂）在高强度紫外光或电子束作用下发生固化反应。目前这一光固化工艺已在工业部门的很多领域得到广泛应用。光固化配方产品主要是由低聚物、反应性稀释剂和光引发剂等原材料组成。自2005年以来,我国几乎所有的光固化材料（除光引发剂以外）都在持续增长,即使在2008年国际金融危机期间受到的冲击也不大。2010年的行业数据表明,我国光固化材料市场依然充满生机,不过高端应用的光固化材料仍然需要进口。     

Comparison of microwave and thermal cure of epoxy–anhydride resins: Mechanical properties and dynamic characteristics

The objective of this work was to compare the mechanical properties of epoxy resins cured by thermal heating and microwave heating. Epoxy–anhydride (100:80) resins were cured in a domestic microwave oven and in a thermal oven. The hardening agents included methyl tetrahydrophthalic anhydride and methyl hexahydrophthalic anhydride. Three types of accelerators were employed. Thermal curing was performed at 150°C for 20 and 14 min for resins containing 1 and 4% accelerator, respectively. Microwave curing was carried out at a low power (207 or 276 W) for 10, 14, and 20 min. All cured resins were investigated with respect to their tensile properties, notched Izod impact resistance, and flexural properties (three‐point bending) according to ASTM standards. The tan δ and activation energy values were investigated with dynamic mechanical thermal analysis, and the extent of conversion was determined with differential scanning calorimetry. The differences in the mechanical properties of the thermally cured and microwave‐cured samples depended on the resin formulation and properties. Equivalent or better mechanical properties were obtained by microwave curing, in comparison with those obtained by thermal curing. Microwave curing also provided a shorter cure time and an equivalent degree of conversion. The glass‐transition temperatures (tan δ) of the thermally and microwave‐cured resins were comparable, and their activation energies were in the range of 327–521 kJ/mol. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1442–1461, 2005     

微波技术在环氧树脂及其复合材料中的应用

论述了近年来微波固化技术在环氧树脂及其复合材料固化中的应用,重点比较了微波固化与传统热固化后环氧树脂及其复合材料的力学性能、热性能和粘结强度的变化,并对环氧树脂复合材料微波固化的研究进行了展望。     

Adhesion of electron beam curable coatings on metal substrates

Electron beam (EB) curing is growing more and more important as a curing technique in industrial coatings, for example on substrates like wood, paper and plastics. However, commercial applications of EB curing on metal substrates are rather limited. The main technical cause for this originates from the insufficient adhesion and flexibility shown by EB cured coatings when applied on metal parts. However, adhesion and flexibility can be improved by various ways, in particular via a proper choice of the chemical pretreatment of the substrate. Adhesion of coatings, based on acrylated resins, on hot dipped galvanized steel can be improved dramatically by using a pretreatment, which is not usual in the current field of commercial coil coating. Pretreatments investigated show no relationship to surface tension, so it is highly probable that a chemical graft reaction, initiated by the electron beam, occurs at the interface of the coating and pretreatment layer. Experiments also show that cationic curing binder systems show promise with respect to adhesion and flexibility. Without optimizing the coating formulation (no wetting agents or other additives are used) relatively good adhesion and flexibility can be obtained on hot dipped galvanized steel, under both wet and dry conditions. The adhesion and flexibility are shown to be dependent on the radiation dose, and can be further improved by post-heating. In this case the polymer network gets the opportunity to relax internal stresses that are built up during the cure reaction.     

Synthesis of bisphenol a novolac epoxy resins for coating applications

Bisphenol A novolacs were synthesized in both melting and solution processes using p‐formaldehyde and formalin solution in presence of oxalic acid catalyst, respectively. Hydrogen nuclear magnetic resonance, ¹H NMR, investigations show a high methylene bridge contents in the novolacs synthesized in a melting process. These novolacs were analyzed by gel permation chromatography (GPC) and fourier transform infrared spectroscopy (FTIR). The bisphenol A novolac was cured with 1‐(2‐amino ethyl) piprazine (AEP) as a curing agent for epoxy resins. The cured resins were evaluated as organic coating for steel. The mechanical properties of the cured epoxy resins were evaluated. The chemical resistances of the cured resins were evaluated through salt spray resistance, hot water, solvents, acid and alkali resistance measurements. The data indicate that the cured epoxy resins have excellent chemical resistances as organic coatings among other cured resins. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Microencapsulation of triglycidyl isocyanurate by solvent evaporation method for UV and thermal dual‐cured coatings

Triglycidyl isocyanurate (TGIC), a thermal curing agent, was encapsulated with poly(methyl methacrylate) with small particle size and narrow distribution for the application in acrylic resins to prepare one‐package UV and thermal dual‐cured coatings. Investigation of the wettability and thermal properties suggests that the microcapsules have better compatibility with acrylic resins and thermal stability as compared to pure TGIC. Results of the release performance experiments indicate good storage stability at 25°C and a quick release of vast TGIC at 120°C for the microcapsules. The UV‐thermal dual‐cured coatings prepared with the microcapsules exhibit a fast, even and complete hardening at 130°C together with an excellent adhesion to the mild steel panels. The results presented here show an application potential of the microcapsules in UV and thermal dual‐cured paints. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 41008.     

光固化粉末涂料涂膜性能研究

以不饱和聚酯和丙烯酸环氧树脂为光固化粉末涂料的基体树脂,研究了两种基体树脂的结构、配比对光固化涂膜固化度及其性能的影响。结果表明固化度是影响耐溶剂性能、附着力、涂膜硬度和冲击强度的关键,适宜的n(UP)/n(EA)为1∶1;固化度应大于95%,可以达到99%。