水性木器漆技术与市场

介绍了水性木器漆的主要类型,包括醇酸乳胶漆、丙烯酸水分散体涂料、聚氨酯水分散体涂料、双组分聚氨酯涂料和丙烯酸聚氨酯涂料等,考察了国内外水性木器漆的市场情况。     

水性木器涂料的研究进展

从自交联的单组分丙烯酸乳液、脂肪酸改性的聚氨酯分散体、微乳丙烯酸涂料、自乳化聚合物及新型丙烯酸聚氨酯聚合物等水性木器涂料新技术，综述了水性木器涂料的研究进展和发展趋势。     

水性双组分丙烯酸聚氨酯涂料研究进展

从成膜机理、丙烯酸酯组分的制备、异氰酸酯组分的分散等方面,评述了高交联密度的水性双组分丙烯酸聚氨酯涂料的新进展.阐明发展水性双组分丙烯酸聚氨酯涂料应将丙烯酸酯共聚物的合成工艺、聚氨醑固化剂的选择和施工技术相结合,并指出了水性双组分丙烯酸聚氨酯的发展趋势.     

木器涂料用水性树脂的合成与进展(一)

对水性醇酸树脂、水性聚氨酯树脂、水性丙烯酸树脂、水性聚氨酯-丙烯酸杂化体以及水性UV光固化树脂为成膜物质的木器涂料用水性树脂的合成及改性进行了阐述。     

木器涂料用水性树脂的合成与进展(三)

对水性醇酸树脂、水性聚氨酯树脂、水性丙烯酸树脂、水性聚氨酯-丙烯酸杂化体以及水性UV光固化树脂为成膜物质的木器涂料用水性树脂的合成及改性进行了阐述。     

木器涂料用水性树脂的合成与进展(二)

对水性醇酸树脂、水性聚氨酯树脂、水性丙烯酸树脂、水性聚氨酯-丙烯酸杂化体以及水性UV光固化树脂为成膜物质的木器涂料用水性树脂的合成及改性进行了阐述。     

水性聚氨酯外墙弹性涂料的制备和研究

介绍了一种水性丙烯酸聚氨酯外墙弹性涂料的配方及工艺,研究了成膜物质、颜料体积浓度、助剂等因素的影响,并讨论了水性丙烯酸聚氨酯外墙弹性涂料的施工及应用。     

水性丙烯酸涂料的改性研究进展

指出水性丙烯酸树脂存在的问题及其改性研究方向。介绍了醇酸、有机硅、聚氨酯、环氧树脂及纳米粒子等改性水性丙烯酸涂料以及采用新的乳液聚合技术对水性丙烯酸涂料进行改性的研究进展。通过上述改性,提高了水性丙烯酸涂料的综合性能,使其应用范围更加广阔。     

高弹性水性聚氨酯橡胶涂料的研制

以水性丙烯酸改性聚氨酯(PUA)乳液为基料,加入功能性颜填料和助剂,制备出一种高弹性水性聚氨酯橡胶涂料。对高弹性水性聚氨酯涂料与传统橡胶涂料进行了一系列模拟涂覆橡胶管的对比试验,结果表明:高弹性水性聚氨酯涂料可以很好地满足工艺要求。     

新品传真

2001501 脂肪酸改性的水性聚氨酯或水性丙烯酸聚氨酯共聚物 用脂肪酸改性水性聚氨酯或水性丙烯酸聚氨酯共聚物,通过脂肪酸的自动氧化交联,可提高抗化学品性,耐沾污性和耐溶剂性,相当于用氮杂环丙烷交联的水性聚氨酯或溶剂型油改性氨酯涂料。2001502 用环氧酯作为铝粉的防蚀剂 环氧酯可作为水性涂料(pH8-10)中铝     

我国聚氨酯胶粘剂的发展现状及趋势

评述了我国聚氨酯胶粘剂的发展现状和趋势,对一些主要胶种如鞋用聚氨酯胶、通用型聚氨酯胶、复合膜用聚氨酯胶粘剂、单组份聚氨酯液体胶、无溶剂聚氨酯结构胶、水性聚氨酯胶粘剂、单组份湿固化聚氨酯密封胶、聚氨酯泡沫密封剂、反应型聚氨酯热熔胶等的发展状况、市场和趋势分别作了概述。     

聚氨酯填充型泡沫混凝土复合材料的性能研究

将不同掺量聚氨酯(PU)加入泡沫混凝土(FC),研究聚氨酯填充型泡沫混凝土(FC/PU)复合材料的性能。结果表明:随着PU掺量的增加,FC/PU复合材料的导热系数不断降低,阻燃性能变差。PU掺量为0~4%时,随着PU掺量的增加,FC/PU复合材料的浆体黏度逐渐降低,气孔特性变好,抗压强度不断增大。PU掺量超过4%时,FC/PU复合材料黏度开始增大,气孔特性变差,抗压强度逐渐降低。PU掺量为4%时,FC/PU复合材料的综合性能最优,与未掺入PU相比,黏度降低62.7%,气孔特性较好,抗压强度提高75.0%,导热系数降低18.7%,阻燃性能仍能达到A1级。     

Damping properties of interpenetrating polymer networks of polyurethane‐modified epoxy and polyurethanes

Interpenetrating polymer networks (IPNs) were prepared from polyurethane (PU)‐modified epoxy with different molecular weight of polyol and polyurethanes based on the mixture of polydiol and polytriol by a one‐shot method. Two types of PU‐modified epoxy: PU‐crosslinked epoxy and PU‐dangled epoxy were synthesized, and the effects of the different molecular weights of polyol in the PU‐modified epoxy/PU IPNs on the dynamic mechanical properties, morphology, and damping behavior were investigated. The results show that the damping ability is enhanced through the introduction of PU‐modified epoxy into the PU matrix to form the IPN structure. As the molecular weight of polyol in PU‐modified epoxy increases, the loss area (LA) of the two types of the IPNs increases. PU‐dangled epoxy/PU IPNs exhibit much higher damping property than that of the PU‐crosslinked epoxy/PU IPNs with 20 wt % of PU‐crosslinked epoxy. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 328–335, 1999     

用FTIR研究聚氨酯／不饱和聚酯IPN体系的反应动力学

利用傅里叶变换红外光谱研究聚氨酯不饱和聚酯互穿聚合物网络体系的反应动力学，求出了ＰＵ的反应速度常数ｋ。实验结果表明，ＰＵ在半－ＩＰＮ体系中的反应为二级反应，ＩＰＮ体系中ＰＵ组分与ＵＰ组分的反应相互影响：ＵＰ组分使ＰＵ组分的前期反应速度变慢，后期反应速度相对增加；ＰＵ组分使ＵＰ组分聚合的诱导期明显缩短。ＰＵ和ＵＰ的配比对反应转化率的影响是反应前期ＰＵ组分含量越高，ＰＵ组分反应转化率也越高；反应后期，     

聚氨酯胶粘剂的研究进展

综述了聚氨酯胶粘剂的合成、特性和种类。概述了近年来国内外聚氨酯胶粘剂的研究和应用进展,重点介绍了聚氨酯胶粘剂的发展动态和几类主要的聚氨酯胶粘剂,并对其进行了分析,结合实际情况对今后聚氨酯胶粘剂的发展方向作出了展望。     

软包装用聚氨酯胶黏剂发展近况

简要介绍了软包装及所用聚氨酯(PU)复膜胶的迅猛发展历程.分别介绍了溶剂PU胶黏剂、醇溶PU胶黏剂、无溶剂PU胶黏剂和水性PU(WPU)胶黏剂的发展概况及其优缺点.随着技术进步和环保意识的增强,PU复膜胶由溶剂型逐步向无溶剂、水性方向发展.还介绍了将丙烯酸酯基团引入WPU主链以降低成本、改进某种性能、引人双键等方面的研...     

Interpenetrating polymer networks of polyurethane and furfuryl alcohol,IIa. Processability and properties of pultruded fiber-reinforced composites

A feasibility study of pultrusion of fiber-reinforced polyurethane/furfuryl alcohol (PU/FA) interpenetrating polymer/network IPN composites has been made. From the viscosity study, it was found that the pot life of the PU/FA IPN prepolymers increased with PU content and showed high reactivity at elevated temperature. It was confirmed from the morphological study that the wetting of fibers by the PU/FA IPN resins was improved with PU content. The appearance of the tensile failure surfaces of the pultruded glass fiber-reinforced PU/FA IPN composites showed “hackle patterns” for PU contents below 15 phr. The mechanical property study shows that the tensile strength of pultruded PU/FA IPN composites is the highest when the PU content is 5 phr. However, the flexural strength, flexural modulus and HDT decreased with PU content. The mechanical properties of various fiber-reinforced (glass, carbon, and Kevlar 49 aramid fiber) pultruded PU/FA IPN composites increased with fiber volume content.     

环保型聚氨酯涂料的研究进展

综述了环保型聚氨酯固化剂品种、性能与应用,阐述了水性聚氨酯涂料分类、制备方法和改性研究以及聚氨酯粉末涂料和有机硅聚氨酯功能涂料的改性研究进展。讨论了聚氨酯固化剂中游离单体脱除的工艺和方法,建议采用聚合与高效分离技术相结合的方法降低聚氨酯固化剂中残留游离异氰酸酯单体含量。指出聚氨酯涂料的发展趋势为进一步完善高固体含量羟基树脂的制备技术,发展无异氰酸酯基的潮固化聚氨酯涂料,充分利用可再生的植物油制备无溶剂聚氨酯涂料。     

A Study on Structure and Mechanical Properties of Polyurethane/Organic-Montmorillonite Nanocomposites

The intercalated nanocomposites of polyurethane (PU) with organic-montmorillonite (OMMT) treated by cetryltrimethyl ammonium bromide was prepared. The interlayer spacing of PU/OMMT nanocomposites was 3–4 nm. The interface interaction of PU/OMMT nanocomposites was improved compared to that of PU/montmorillonite (MMT) composites. The orderly arrangement of the PU chains was hindered because of strong interface interaction between the silicate layers dispersed in the nanometer and PU chains. By adding 2 wt% OMMT to PU, tensile strength and tear strength of the PU/OMMT composites were increased from 10.5 MPa and 36.4 KN/m to 13.8 MPa and 42.2 KN/m, respectively. The tensile strength and tear strength increased with OMMT content firstly, reaching its maximum when the OMMT content was 8 wt%. After that, the tensile strength and tear strength decreased with the further increase of the OMMT content. Compared to that of PU, the elongation at break of the PU/OMMT nanocomposites increased, indicating that the stretch of PU/OMMT nanocomposites increased.     

浅谈我国聚氨酯弹性体发展动态

介绍聚氨酯弹性体的特性。指出我国将成为全球聚氨酯(PU)弹性体的消费和产能大国,其中氨纶、热塑性聚氨酯(TPU)弹性体、PU鞋底、PU合成革是我国聚氨酯弹性体未来主导产品,纺织工业和轻工业是拉动我国今后PU弹性体快速发展的主要产业。