非异氰酸酯聚氨酯的研究进展及应用

综述了非异氰酸酯聚氨酯(NIPU)的合成原理与性能特点,讨论了两种合成原料环碳酸酯齐聚物和胺类齐聚物的合成方法及最新研究进展,介绍了NIPU的应用范围及发展前景.     

非异氰酸酯聚氨酯的研究进展

简要概述了非异氰酸酯聚氨酯(NIPU)的合成原理与性能特点,介绍了典型NIPU、杂化非异氰酸酯聚氨酯(HNIPU)、硅氧烷改性非异氰酸酯聚氨酯、丙烯酸改性杂化非异氰酸酯聚氨酯(A-HNIPU)等几种非异氰酸酯聚氨酯的研究进展,展望了此类材料的应用现状与发展前景。     

大豆油型非异氰酸酯聚氨酯的合成与表征

以环氧大豆油为原料合成了大豆油环碳酸酯(CSBO),并进一步与脂肪族伯胺反应合成了大豆油型非异氰酸酯聚氨酯(E-NIPU)。利用FT-IR、GPC、元素分析等分析手段对产物的结构进行了表征。     

非异氰酸酯聚氨酯发展近况

非异氰酸酯聚氨酯(NIPU)的特殊分子结构,赋予其材料比传统聚氨酯(PU)更独特的性能,并促使20世纪90年代研发热潮,发展较快.简述了传统PU生产和制品呈现的问题、NIPU市场发展概况及其性能特征、NIPU合成方法发展沿革及合成反应机理;举例说明典型和杂化NIPU的几种其体合成方法,并介绍其主要应用领域.     

Structure–property relationships in polyhydroxyurethanes produced from terephthaloyl dicyclocarbonate with various polyamines

This article focuses on the synthesis and characterization of polyhydroxyurethanes (PHUs) obtained from the reaction between bis[(2‐oxo‐1,3‐dioxolan‐4‐yl)methyl]benzene‐1,4‐dicarboxylate (DCter) and various diamines (aliphatic, cycloaliphatic and oligomeric) or polyamines (diethylenetriamine (DETA) and diethylenetetramine (TETA)). The temperature and time conditions associated with each step‐growth polyaddition were defined by rheological tests directly performed on the reactive mixture. The chemical structures of DCter‐based PHUs containing primary and secondary alcohol groups were characterized using Fourier transform infrared spectroscopy. Differential scanning calorimetry experiments were performed on the various PHUs in order to investigate the influence of the chemical structure of the amines on the thermal properties of the polymers. Two different kinds of PHUs were obtained. On the one hand, the use of diamines led to thermoplastic polymers with a glass transition temperature (T_g) ranging from 4 to 78 °C depending on the flexibility of the diamine involved in the reaction. The hierarchy based on PHU T_g could be verified using the Van Krevelen methodology. On the other hand, PHUs produced from polyamines TETA and DETA were found to be insoluble and infusible due to the creation of polymeric networks. The DCter–DETA polymer had a higher T_g revealing a probable difference in the reactivity of primary and secondary amine groups. Copyright © 2012 Society of Chemical Industry     

非异氰酸酯聚氨酯材料的制备技术及应用研究进展

介绍了非异氰酸酯聚氨酯(NIPU)的发展概况,讨论了NIPU的主要制备技术,并综述了NIPU在涂料、胶粘剂和泡沫等方面的应用研究进展。     

非异氰酸酯聚氨酯最新研究进展与应用

综述了非异氰酸酯聚氨酯(NIPU)及其两种合成原料环碳酸酯齐聚物和胺类齐聚物的最新研究进展,讨论了环碳酸酯和胺类齐聚物的合成方法以及NIPU的合成机理,介绍了NIPU的应用范围、发展前景及国外企业对于此类新型材料的最新研发情况和工业动态。最后指出原料易制备、无毒安全、价格便宜的NIPU是今后研究的重点。     

非异氰酸酯聚氨酯涂料的制备及性能研究

将2,3-环碳酸甘油酯甲基丙烯酸酯(PCMA)与丙烯酸酯类单体共聚生成的聚合物作为主要成膜物,以二乙烯三胺为固化剂,制备了非异氰酸酯聚氨酯涂膜(NIPU).通过门-IR对涂膜结构进行分析,证明了聚氨酯特殊基团氨基甲酸酯的合成;并通过对漆膜综合性能的研究,确定了共聚实验配方及固化合成NIPU的最佳工艺.配制的清漆漆膜综合性能优良,同时其制备过程中不以有毒、高湿敏性的异氰酸酯为原料,安全、环保.     

Ultraviolet and thermostable non-isocyanate polyurethane coatings

Summary  Conventional monolithic polyurethanes have good mechanical properties, but they are porous, and posseses poor hydrolytic stability and insufficient permeability. The involvement of toxic components, such as isocyanates, in their production process makes this process extremely toxic and dangerous. Network non-isocyanate polyurethanes (NIPUs) are formed from the reaction between cyclocarbonate oligomers (CCOs) and primary amine oligomers (PAOs). The authors of this paper are studying new types of NIPUs based on acrylic and siloxane CCOs and dendro-polyfunctional siloxane PAOs. These investigations create the possibility to develop high-level UV-stable coatings based on acrylic -dendro-amine systems, which are curable at room temperature, and their most able siloxane-based systems that have good adhesion and mechanical properties. An advanced way of preparing thermo-stable coatings is based on ‘blocked’ non-isocyanate polyurethane.