低折射率UV光纤涂料的制备及性能研究

以甲基丙烯酸十二氟庚酯、丙烯酸六氟丁酯、丙烯酸正丁酯、丙烯酸、甲基丙烯酸缩水甘油酯为主要原料合成了低折射率含氟丙烯酸树脂(FA)。通过红外光谱对FA的结构进行了表征,研究了各原料对FA性能的影响。以FA树脂为主体,配合含氟活性稀释剂、多官能活性稀释剂、光引发剂制备了折射率低于1.378 0的紫外光固化光纤涂料,分析了各组分对涂料外观、折射率、黏度、固化速度及力学性能的影响。     

一种高性能紫外光固化胶粘剂的制备

以异佛尔酮二异氰酸酯IPDI、改性聚醚多元醇、甲基丙烯酸羟乙酯(HEMA)为主要原料,制备了聚氨酯丙烯酸酯PU1。考查了水解剥离型紫外光固化胶粘剂的基本配方中各主要组分对粘接强度和水解剥离性能的影响。研究结果表明,PU1作为基础树脂玻璃粘接强度高同时剥离时间短分别为12.2 MPa和30 min;亲水性单体聚乙二醇二丙烯酸酯比单官能甲氧基聚乙二醇丙烯酸酯在粘接强度和水解剥离速度上优异。其中FA-260A均衡性最佳,玻璃粘接强度12.5 MPa,水解剥离时间20 min;高折射率、疏水性环状单体对基本配方的折射率的调节有帮助,可以实现胶粘剂折射率1.50的要求,其中低官能度邻苯基苯氧乙基丙烯酸酯性能最佳;溶剂选用环保型低级醇对水解剥离性能有帮助。()()     

水性紫外光固化真空镀膜涂料的制备与性能研究

合成了具有高交联密度的水性聚氨酯丙烯酸酯分散体和高相对分子质量的水性丙烯酸酯分散体,并复配多官能度丙烯酸酯单体、光引发剂制备了水性紫外光(UV)固化真空镀膜涂料。分析研究了各组分对涂膜性能的影响,确定了最优配方。研制的水性UV涂料固化速度快、附着力优异、耐热性能好、上镀性佳,在真空镀膜领域具有良好的适应性。     

UV固化光纤带涂料的研制

用环氧丙烯酸酯与聚氨酯丙烯酸酯共混聚合的方法制备出性能优良的UV固化光纤带涂料。讨论了齐聚物种类,齐聚物共混配比,不同官能度单体配比,齐聚物与单体的配比以及光引发剂及其含量对UV固化光纤带涂料的性能如剥离性、拉伸强度、延伸率和柔韧性的影响。     

高性能含氟丙烯酸涂料

天津灯塔涂料有限公司涂料研究所的黄震等将液态含氟丙烯酸单体与丙烯酸酯类单体，采用常压溶液聚合工艺，合成了支链含氟的丙烯酸树脂。配成白色磁漆后，机械性能、耐介质性能及耐候性与其他含氟树脂所制磁漆相当。     

空调铝箔用高耐水性含氟丙烯酸疏水涂料的研制

以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)以及丙烯酸十八酯(SA)为原料,甲基丙烯酸-β-羟乙酯(HEMA)为羟基功能单体,含氟丙烯酸酯单体为有机氟改性剂,通过溶液自由基聚合反应制备了含氟丙烯酸树脂溶液,再与固化剂配合使用制得高耐水性疏水涂膜。研究了不同含氟丙烯酸酯单体对涂膜的水接触角和水溶率的影响,讨论了甲基丙烯酸全氟烷基乙酯(PFMA)与HEMA不同用量对涂膜的疏水性和耐水性的影响,获得了最佳反应配方:MMA 57%,BA 12%,SA 4%,PFMA 20%,HEMA 7%。对优化配方下制备的涂膜进行了红外光谱分析,与市售涂料相比,测试了涂膜的综合性能。结果表明,最佳反应配方制备的涂膜的水接触角为132.7°、水溶率为4.1%,综合性能与美国Ultratech公司生产的空调铝箔用超疏水涂料Ultra AC系列透明清漆相当。该涂料满足空调铝箔表面处理要求。     

水性阳离子型聚氨酯丙烯酸酯真空镀膜金属涂料

以异佛尔酮二异氰酸酯、聚酯多元醇、N-甲基二乙醇胺、季戊四醇三丙烯酸酯、去离子水、乙酸等原料合成了UV固化的多官能度水性阳离子型聚氨酯丙烯酸酯树脂。通过正丁胺法监测合成过程中异氰酸酯跟(-NCO)的含量,并讨论了胺值、原料的不同配比等因素对涂料性能的影响,通过性能测试,表明该水性多官能度聚氨酯丙烯酸酯树脂通过搭配活性单体、光引发剂、助剂和助溶剂等,配制成了性能优异的金属用水性真空镀膜涂料。     

含氟聚（甲基）丙烯酸酯乳液的研究进展

含氟聚(甲基)丙烯酸酯乳液具有合成简便和性能易调等优点,所得涂膜表面能低、耐污性能好、化学稳定性优异,因而在水性氟碳涂料领域受到广泛关注。含氟聚(甲基)丙烯酸酯单体的化学组成对乳液和涂膜性能影响很大。该文分类总结了含氟核心单体包括含氟烷基(甲基)丙烯酸酯、含氟杂原子(甲基)丙烯酸酯、含氟芳香(甲基)丙烯酸酯、含氟(甲基)丙烯酰胺和含氟磺酰胺(甲基)丙烯酸酯等的结构与乳液和涂膜性能的关系,然后对含氟聚(甲基)丙烯酸酯单体和乳液的合成方法进行归纳,最后简要介绍含氟聚(甲基)丙烯酸酯乳液的应用,并对乳液研究存在的问题和未来的发展方向进行展望。     

含氟丙烯酸酯类单体合成技术进展

含氟丙烯酸酯聚合物具有许多特殊优异性能,成为新型含氟材料领域研究热点。在许多要求特殊性能领域获得广泛应用,如特殊涂料、纸张和皮革涂饰剂、织物整理剂等。阐述了含氟丙烯酸酯类单体合成技术进展,并对其研究开发提出一些建议。     

高性能含氟丙烯酸酯共聚物涂料

研究了含氟丙烯酸酯共聚物涂料表面性能的影响因素,结果表明：含氟丙烯酸酯类单体及共聚单体的种类、侧链含氟烷基、聚合工艺、自由基引发剂用量和有机硅偶联剂及交联催化剂等因素对共聚物膜的疏水性(水接触角和吸水率)、表面硬度及其光泽、透明性都有显著影响。     

Preparation and properties of UV-curable di-functional sulfur-containing thioacrylate and thiourethane acrylate monomers with high refractive indices

We synthesized UV-curable di-functional sulfur-containing thioacrylate and thiourethane acrylate with high refractive indices. The structures of monomers were confirmed by nuclear magnetic resonance spectroscopy (NMR) and Fourier transform infrared spectroscopy (FT-IR). The formulation of UV-curable coating film was prepared by thioacrylate monomer, thiourethane acrylate monomer, α-hydroxy-α-methylpropiophenone as the photoinitiator, and bisphenol A epoxy acrylate as the oligomer. The cured coating films were investigated using thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), Taber abraser tests, transmittance, and refractive index. The value of refractive index for all coating films increased after UV-curing. Transparent, photocurable coating films with high abrasion resistance were prepared. The monomers showed high refractive index. The refractive indices of synthesized monomers (thioacrylate and thiourethane acrylate monomer) are 1.623 and 1.577, respectively.     

UV固化松节油基聚酯丙烯酸酯的合成研究

以松节油-马来酸酐(TMA)、顺丁烯二酸酐(MA)、1,2-丙二醇和丙烯酸(AA)为主要原料合成了紫外光固化松节油基聚酯丙烯酸酯(TMAPEA)低聚物。采用FT-IR对产品进行了结构表征。通过凝胶色谱,热重分析和涂膜性能测试研究了反应时间对产物酸值的影响,合成工艺对产物分子质量及固化膜性能的影响,TMA加入量对固化膜力学性能、耐化学腐蚀性和热稳定性的影响。结果表明,两步法优于一步法,第1步反应时间为6.5 h,第2步8 h,TMA的加入提高了固化膜的耐化学腐蚀性和热稳定性,TMAPEA可以作为耐热性或耐腐蚀性树脂使用。     

Effect of Aging on the Mechanical Properties of UV Curable Optical Fiber Coatings

Abstract

A dual-layer urethane acrylate UV-cured coating is widely used to protect optical fibers because of its well-balanced mechanical properties, weathering resistance and rapid curing. The long-term mechanical behavior of fiber coatings is important for the reliability of optical fibers. Long-term exposure of UV-cured polyether urethane acrylate films was carried out in dry air and in water at elevated temperatures. Tensile testing was performed to reveal changes in mechanical properties and dynamic mechanical analysis to determine both the glass transition temperature and the crosslink density. The equilibrium swelling allowed assessment of the crosslink density. Tensile testing and strip force measurements were performed on virgin and aged optical fibers. Initially the fracture strengths of the secondary coatings increased under all aging conditions indicating post-curing reactions and the possible loss of uncrosslinked species. Aging under wet conditions led at a later stage to hydrolytic degradation of the network and to a decrease in the fracture stress. The equilibrium swelling and equilibrium modulus measurements showed good correlation with the changes in strength. The primary coatings showed a decrease in mechanical strength after only 2–4 weeks under all conditions.     

单组分有机硅导电涂料的制备及其性能研究

以耐高温有机硅为基体,银包铜粉为填料制备了一种导电涂料,通过对其涂膜的体积电阻率、附着力、冲击强度、粘度测试和TG分析,研究了银包铜粉含量对导电涂料电性能、物理力学性能的影响以及该涂料的适用期、耐热性和耐老化性。结果表明,当银包铜粉质量分数为导电涂料的60%时,产物体积电阻率可达6.27×10-4Ω·cm,附着力一级,冲击强度>50 kg·cm,常温8 h内粘度可保持在6.0 Pa·s,固化物热分解温度高达532.7℃,并具有优良耐老化性。     

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。     

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。     

真空镀膜用水性聚氨酯UV树脂的合成及改性

环氧树脂在粘接性、耐水性、耐热性、耐化学品性及力学性能等方面性能优越,常用于水性聚氨酯材料的改性。文章合成了环氧树脂改性的水性聚氨酯的制备方法,并着重讨论了环氧树脂的加入量对其应用于真空镀膜涂料的耐水性、耐热性和力学性能的影响。     

Design and UV-curable behaviour of boron based reactive diluent for epoxy acrylate oligomer used for flame retardant wood coating

Difunctional boron-containing reactive flame retardant for UV-curable epoxy acrylate oligomer was synthesized from phenyl boronic acid and glycidyl methacrylate. The synthesized reactive diluent was utilized to formulate ultraviolet (UV)-curable wood coatings. The weight fractions of reactive diluent in coatings formulation was varied from 5 to 25 wt % with constant photoinitiator concentration. The molecular structure of reactive flame retardant was confirmed by Fourier-transform infrared, Nuclear magnetic resonance (NMR) and ¹¹B NMR spectral analysis. Further, the efficacy of flame retardant behaviour of coatings was evaluated using limiting oxygen index and UL-94 vertical burning test. Thermal stability of cured coatings films were estimated from thermogravimetric and differential scanning calorimetry analysis. The effects of varying concentration of reactive diluent on the viscosity of coatings formulation along with optical, mechanical and chemical resistance properties of coatings were also evaluated. The coatings gel content, water absorption behaviour, contact angle analysis and stain resistance were also studied.     

聚氨酯丙烯酸酯/SiO_2纳米杂化涂层的制备及其性能研究

采用不同相对分子质量的聚乙二醇(PEG-200、400、600)分别与六亚甲基二异氰酸酯(HDI)反应合成预聚体,再以此预聚体对纳米SiO2进行表面接枝改性,制备了聚氨酯改性纳米SiO2;将改性纳米SiO2分散到聚氨酯丙烯酸酯(PUA)中光固化制备了PUA/SiO2纳米杂化涂层。讨论了PEG相对分子质量对PUA/SiO2纳米杂化涂层的耐热性能和力学性能的影响,并以FT-IR、差示扫描量热法(DSC)等进行表征。结果表明,改性后的纳米SiO2粒子优化了PUA树脂的性能,且以PEG-400与HDI合成的预聚体来改性纳米SiO2用于制备的PUA/SiO2纳米杂化涂层具有较好的耐热性和抗冲击性。     

Waterborne Polyurethane-Acrylate Containing Different Polyether Polyols: Preparation and Properties

The waterborne polyurethane–acrylate (PUA) was prepared based on isophorone diisocyanate, polyether polyol, dimethylol propionic acid, hydroxyethyl methyl acrylate, butyl acrylate (BA) and styrene (St). Fourier transform infrared spectrometry (FT-IR), Ultraviolet-visible spectrophotometry (UV-Vis) and Differential scanning calorimetry (DSC) were employed to investigate the structures, optical transparency and thermal properties. Some physical properties of the aqueous dispersions such as viscosity, particle size and surface tension were measured. Some mechanical performances and solvent resistance of films were investigated. When the ratio of the BA/St was 30/70, the films had excellent water and alkali resistances. The obtained PUA composites have great potential application such as coatings, leather finishing, adhesives, sealants, plastic coatings and wood finishes.