聚氨酯－丙烯酸酯复合乳液制备方法的进展

综述了聚氨酯－丙烯酸酯(PUA)复合乳液的制备方法,主要包括共混交联法、核壳乳液聚合法、互穿聚合物网络( IPN)法、无皂乳液聚合法、微乳液聚合法和细乳液聚合法;介绍了这些制备方法的优势和应用范围,并展望了PUA复合乳液的发展前景.     

一步法制备聚氨酯—聚丙烯酸酯复合乳液的工艺研究

针对传统两步法合成PUA复合乳液的不足,提出了一步法合成PUA复合乳液的新方法,即以1,12-十二烷基二醇和IPDI为主要原料,用细乳液聚合方法一步法制备了PUA复合乳液。     

制备聚氨酯一丙烯酸酯复合乳液的物料与工艺

介绍了适合于制备聚氨酯-丙烯酸酯(PUA)复合乳液的常规物料及新近开发的物料,包括多异氰酸酯、聚多元醇、乙烯基单体、亲水性物质、中和剂、交联剂、引发剂等。介绍了种子乳液聚合法、原位乳液聚合法和溶液聚合转相法三种典型的制备PUA复合乳液的工艺及其最新进展。指出开发功能性原材料、完善原位乳液聚合法和溶液聚合转相法以及探索新的合成工艺将成为今后研制高性能PUA复合乳液的重要领域。     

聚氨酯-聚丙烯酸酯复合乳液合成工艺的研究

采用种子乳液聚合法制备了聚氨酯-聚丙烯酸酯(PUA)复合乳液。比较了4种不同合成工艺对PUA复合乳液性能的影响。试验结果发现，单体中和合成工艺的PUA复合乳液的贮存稳定性、机械性能和耐水性好，具有工艺简单、污染小、成本低的特点。     

细乳液聚合法制备PUA杂合乳液研究进展

聚氨酯-丙烯酸酯(PUA)杂合乳液可以弥补聚氨酯乳液和丙烯酸酯乳液各自的不足,使聚氨酯良好的耐磨性和机械性能与丙烯酸酯良好的耐候性与耐水性有机结合,从而达到优势互补.介绍了应用细乳液聚合法制备PUA杂合乳液的优势,综述了近年来细乳液聚合法在制备PUA杂合乳液的机理和应用研究方面的进展.     

聚氨酯/聚丙烯酸酯复合乳液研究进展

综述了水性聚氨酯/聚丙烯酸酯(PUA)复合乳液几种合成方法:物理共混法,化学交联法,原位乳液聚合法,种子乳液聚合法以及微乳液和细乳液聚合法的研究进展,介绍了PUA复合乳液乳胶粒的不同核/壳结构和PUA互穿网络,报导了采用蓖麻油、有机氟、有机硅和环氧树脂改性PUA的技术进展以及新型光固化PUA,并对聚氨酯/聚丙烯酸酯乳液的发展方向作出了预测。     

聚氨酯-丙烯酸酯复合乳液体系及其制备

介绍了化学共聚聚氨酯-丙烯酸酯(PUA)复合乳液体系及其制备工艺,将体系分成非交联型、合成交联型、成膜交联型和互穿网络型四种类型,将制备工艺分成种子乳液法聚合法、原位聚合法和溶液聚合相转化法三种方法,以此综述了PUA复合乳液的制备进展,指出原位法与相转化法制备交联型PUA复合乳液将成为今后的发展方向。     

聚氨酯-丙烯酸酯复合乳液的合成与性能

采用甲基丙烯酸甲酯(MMA)与水性聚氨酯乳液共聚反应制备聚氨酯-丙烯酸酯(PUA)复合乳液,研究了MMA添加量、引发剂种类和聚合温度对PUA复合乳液及涂膜性能的影响,确定了PUA复合乳液合成的工艺参数。用傅立叶红外光谱(FTIR)测定反应产物的结构。研究发现油溶性引发剂比水溶性引发剂更适合PUA体系的乳液聚合。随着MMA添加量的增大,PUA复合乳液胶粒粒径增大,黏度减小,涂膜光泽度下降,机械性能增强,耐水性增加。     

聚丙烯酸酯改性聚氨酯复合乳液研究进展

总结了聚丙烯酸酯改性聚氨酯(PUA)复合乳液(包括PUA共混乳液、PUA共聚乳液、PUA核壳结构乳液、PUA互穿网络乳液)的制备方法和性能特点,详细介绍了近年来PUA复合乳液的新进展,并对PUA复合乳液的发展作了一些展望。     

丙烯酸酯改性水性聚氨酯皮革涂饰剂研究进展

综述了近年来丙烯酸酯改性水性聚氨酯(PUA)皮革涂饰剂的改性方法,包括共混交联法、溶液聚合法、种子乳液聚合法和互穿网络聚合法。讨论了PUA复合乳液及漆膜结构与性能的关系,提出了水性皮革涂饰剂的发展趋势。     

丙烯酸酯改性水性聚氨酯的研究进展

介绍了聚氨酯/丙烯酸酯(PUA)复合乳液的制备方法,包括物理共混、交联共混、复合乳液共聚、核/壳结构乳液共聚法及互穿聚合物网络(IPN)法等,同时从无机纳米粒子改性、氟改性、有机硅改性和环氧树脂(EP)改性等方面对改性PUA复合乳液的研究进展进行了概述。     

聚氨酯/丙烯酸酯复合乳液的制备方法及性能研究进展

介绍了近年来国内外聚氨酯/丙烯酸酯复合乳液制备方法：物理共混、种子乳液聚合法、原位聚合法等;评述了聚氨酯的结构、聚丙烯酸酯、引发剂以及制备方法等因素对复合乳液性能的影响;对目前常用的无机纳米粒子和交联等对聚氨酯/丙烯酸酯复合乳液改性方法进行了讨论;展望了该领域的发展趋势。     

Morphology and particle size of nanograde polyurethane/polyacrylate hybrid emulsions

Poly(urethane acrylate) (PUA) composite particles were prepared by seeded surfactant‐free emulsion polymerization. The aqueous polyurethane (PU) dispersions were used as seed particles. The diameters of the seed particles of the aqueous PU dispersions and PUA composite latexes were measured by dynamic light scattering. The microstructures of the PUA composite emulsion particles were observed by transmission electron microscopy. The influences of the amount of the hydrophilic chain extender, the types of initiators, and the PU/polyacrylate (PA) weight ratios on the diameters of the aqueous PU and composite emulsions were also studied. The results showed that the PUA composite emulsions formed a core–shell structure with PU as the shell and with PA as the core. The diameter of the PU seed particles and the particle size of the PUA composite emulsions greatly depended on the amounts of the hydrophilic chain extender used in the preparation of the PU seed; when the hydrophilic chain extender concentration was 7.4%, the average diameter of the PUA composite emulsion particles showed the minimum value. The types of initiators and PU/PA weight ratios did not have a significant influence on the diameter of the PUA composite latex particles. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

亲水单体对聚氨酯丙烯酸复合乳液性能的影响

采用种子乳液聚合法,以甲苯二异氰酸酯(TDI)、聚醚二元醇(N210)、二羟甲基丙酸(DMPA)和甲基丙烯酸甲酯(MMA)为主要原料合成了聚氨酯丙烯酸(PUA)复合乳液。考察了DMPA对PUA乳液的制备和性能的影响;确定了DMPA的添加工艺及中和度。发现随DMPA添加量增加,PUA乳液的外观变好,乳液粒径变小,乳液黏度增大,乳液凝胶量降低,稳定性变好。随DMPA添加量增大,PUA乳液涂膜的吸水率增大,涂膜的耐水性越差。综合得到w(DMPA)=7 5%,采用后添加DMPA的工艺,且DMPA的中和度90%～100%,可得到性能优异的PUA复合乳液。     

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Waterborne polyurethane/polyacrylate (PUA) emulsions were prepared by dispersing polyurethane (PU) prepolymer in polyacrylate (PA) emulsion; therefore, the PU particles formed in the presence of PA nanoparticles. The particle size and its distribution of the composite PUA emulsion were determined by dynamic light scattering. The result shows that the average particle size increases initially and then decreases with increasing PA content, which is confirmed by transmission electron microscope characterization. The surface properties of PUA films were analyzed by water contact angle and atomic force microscope topography. It indicates that the water contact angle and the average roughness of the composite PUA films are larger than those of the PU film. Meanwhile, mechanical properties test, scanning electron microscopy, and thermogravimetric analyses disclose that the PUA films are characterized by enhanced tensile strength, rough fractured surface, and good thermal stability. The preparation method proposed in this article is an effective and convenient way to manufacture composite PUA emulsion. The composite PUA emulsion can be potentially used in coatings. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43203.