Novel biocompatible waterborne polyurethane using L‐lysine as an extender

Polyurethane (PU) prepolymers based on isophorone diisocyanates, dimethylolpropionic acid, and polycaprolactone were prepared and chain‐ extended in water using L ‐lysine (PU–L), ethylenediamine (PU–E), and their mixture (PU– L–E) as extenders, respectively. The produced emulsion exhibited satisfactory freeze/thaw stability. Films cast from emulsions exhibited excellent mechanical properties and good antiblood coagulation character. Although the water‐swelling ratio for 24 h for PU–L was higher than those of PU–L–E and PU–E, it possessed the smallest hydrolysis rate among the three samples. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 2474–2480, 2002     

水性聚氨酯的改性及水性聚氨酯涂料

介绍了几种水性聚氨酯的改性技术,并对水性聚氨酯涂料的配制及其应用作了相关概述。     

三嗪基含氟扩链剂改性水性聚氨酯的合成

利用三聚氰氯（CC）、八氟戊醇（OFP）和乙醇胺（MEA）间的反应先合成了三嗪基含氟扩链剂CC-F，在此基础上制备出系列三嗪基含氟扩链剂改性水性聚氨酯CC-FPUF。利用FTIR和1HNMR对其结构进行表征，并用DLS、XRD、XPS、SEM、WCA和电子万能试验机探究了CC-FPUF制备中所用CC-F的含量(以CC-F、IPDI、CMA-1044、DMPA、S104、TMP和TEA的总质量为基准，下同）对CC-FPUF的乳液粒径、聚合物形态、胶膜形貌、表面元素组成、疏水性能和力学性能的影响。结果表明，随着CC-F含量的增加，CC-FPUF的乳液粒径、胶膜疏水性能和胶膜拉伸强度均有所增加。当CC-F的含量达到8%（CC-FPUF-8）时，胶膜的水接触角最高达到125.8°，相比不含氟的水性聚氨酯（PU）和CC-FPUF-0（CC-F的含量为0）分别增加了60.9°和34.1°；此时胶膜的拉伸强度最大，相比CC-FPUF-0增加了24.47 MPa。胶膜CC-FPUF-8表现出优异的疏水性能和良好的力学性能。     

A novel cationic waterborne polyurethane coating modified by chitosan biguanide hydrochloride with application potential in medical catheters

This study reported the synthesis and properties of a new cationic waterborne polyurethane coating. In this work, a chitosan derivative, chitosan biguanide hydrochloride (CSGH), was synthesized, which was used as a blocking agent and cross-linking agent to participate in the copolymerization of waterborne polyurethane (WPU) and a bioactive ingredient to enhance the biocompatibility of the coating. FTIR results demonstrated the reaction of CSGH with WPU. Moreover, the particle size distribution of the emulsion and SEM results showed that CSGH and WPU were well integrated. Benefiting from the formation of the cross-linking network, the thermodynamic properties of the coating were significantly improved. Furthermore, due to adding 3 wt% CSGH, the water contact angle of the coating surface decreased from 97.01° to 69.30°, indicating that the coating surface changed from hydrophobic to hydrophilic. And a specific resistance to Staphylococcus aureus and Escherichia coli was exhibited without cytotoxicity, the resistance rates could reach 85% and 91% respectively. It is highlighted that this WPU-CSGH coating has great application potential in the field of medical interventional catheters.     

水性聚氨酯材料研究现状

根据国内外近几年来的研究现状，从原料单体的结构、交联改性和复合改性出发，论述了国内外水性聚氨酯的研究进展，讨论了复合改性水性聚氨酯的研究进展。     

内交联水性聚氨酯胶粘剂的研究

讨论了NCO/OH物质的量比对水性聚氨酯(WPU)性能的影响;分别采用蓖麻油、甘油、三羟甲基丙烷合成内交联型水性聚氨酯,讨论了3种不同内交联剂对WPU耐水性、力学性能、涂膜手感的影响。     

水性聚氨酯胶粘剂的研究进展

随着人们生活水平的提高和环保意识的增强,水性聚氨酯胶粘剂必然将取代溶剂型聚氨酯胶粘剂。论文综述了水性聚氨酯胶粘剂的制备方法、优点及存在的不足、改性方法及效果。最后对水性聚氨酯胶粘剂的发展现状进行了分析,并对其发展趋势进行了展望。     

水分散型聚氨酯的最新研究进展

综述了水分散型聚氨酯的分类、制备,探讨了合成水分散型聚氨酯中原料的选择以及配方的设计,并详细地讨论了水分散型聚氨酯的性能与改性研究,对水分散型聚氨酯今后的发展提出了建议。     

Radiation‐induced dispersion polymerization of methyl methacrylate using waterborne polyurethane as stabilizer

Waterborne polyurethane (WPU) without vinyl groups was synthesized and used as a stabilizer to prepare poly(methyl methacrylate) (PMMA) particles via dispersion polymerization with γ‐rays. The WPU molecular structure was characterized by Fourier transform infrared spectroscopy and ¹H NMR. PMMA particles were observed using scanning electron microscopy. The grafting reaction between PMMA and WPU was ascertained using ¹H NMR. Copyright © 2006 Society of Chemical Industry     

丙烯酸酯改性水性聚氨酯的研究进展

简述了丙烯酸酯改性水性聚氨酯4种常用的改性方法:嵌段共聚改性、接枝共聚改性、核-壳乳液聚合改性和互穿聚合物网络改性(IPN);综述了国内外丙烯酸酯改性水性聚氨酯研究进展。     

改性水性聚氨酯及其粘接性能

综述了水性聚氨酯的改性方法,包括环氧树脂改性、丙烯酸酯改性、有机硅改性、有机氟改性、纳米材料改性、复合改性。比较了各种改性方法的优缺点,指出了水性聚氨酯胶粘剂所存在的问题,展望了水性聚氨酯胶粘剂改性发展趋势。     

水性聚氨酯底胶的研究

采用水性聚氨酯分散体作为PVDC乳液的底胶（底涂剂）,研究了聚合物多元醇、异氰酸酯、封端剂、润湿剂等对涂膜性能的影响,确定了以苯酐-己二酸聚酯多元醇、TDI／MDI混合并氰酸酯、BDO等为主要原材料合成了水性底胶,实验结果表明,该底胶的各项性能完全达到溶剂型底胶的性能要求,且以水为稀释剂大大降低了原材料成本,同时有利于环保。     

鞋用水性聚氨酯胶粘剂研究进展

简要介绍了鞋用水性聚氨酯胶粘剂的发展概况、制备工艺及性能特点,重点论述了鞋用水性聚氨酯胶粘剂在改进单体和合成工艺、交联改性、-NCO（异氰酸酯）封端改性及复合改性4个方面的技术进展,最后介绍了国内外在此领域的最新研究成果．     

丙烯酸酯改性交联型水性聚氨酯胶黏剂

以异佛尔酮二异氰酸酯(IPDI)、聚己二酸-1,4-丁二醇酯二醇(PBA)为主要原料、三聚氰胺为交联剂,合成了双键封端的交联型水性聚氨酯,再经过原位聚合制备了丙烯酸酯改性水性聚氨酯胶黏剂。利用FTIR、XRD、DLS、DTA、电子拉力机、邵氏硬度计等对材料结构与性能进行了表征。通过调节水性聚氨酯与丙烯酸酯的质量比、三聚氰胺的添加量,对产品性能进行了优化。结果表明,当水性聚氨酯与丙烯酸酯质量比为6∶4、三聚氰胺占水性聚氨酯质量为0.53%时,胶黏剂发生5%质量分数的降解温度可达到312℃,吸水率仅为4.69%,T-型剥离强度为5.3 kN/m。     

水性聚氨酯固色剂的性能和合成

水性聚氨酯作为固色剂应用的综述。讨论了水性聚氨酯固色剂的性能特征、合成原理和方法。分析指出水性聚氨酯技术的发展(与天然高分子相结合),将生产出可生物降解的、无金属盐的、较少有机化合物公害的、对环境友好的材料。     

The physical properties of nonionic waterborne polyurethane with a polyether as side chain

A series of nonionic waterborne polyurethanes (WPU) based on hydrogenated methylene diphenylene diisocyanate, polybutylene succinate diol, polybutylene adipate diol, polyethylene glycol, and diethylene glycol as chain extender were synthesized with a polyether, MPEG‐(OH)₂, as side chain. The physical properties such as tensile strength, elongation, hardness, molecular weight, kinetic viscosity, and so on were detected. The WPUs made with polyesters have the best tensile strength but the lowest elongation. Because of the hydrophilic property of MPEG‐(OH)₂ grafted on the WPUs, they have obvious increases of solid contents and water absorptions with the ratio of MPEG‐(OH)₂. The functional group ratio of NCO/OH is another reason affecting the hydrophilic properties of the WPUs. In addition, the water ratios of the dispersions dramatically affect the stability of WPU systems. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

水性聚氨酯胶粘剂研究进展

介绍了水性聚氨酯胶粘剂制备方法,综述了水性聚氨酯改性研究进展,分析了提高水性聚氨酯胶粘剂的耐温性、耐水性、初粘性、润湿性及干燥速度的途径。     

磺酸型水性聚氨酯的研究进展

综述了磺酸型水性聚氨酯乳液SWPU的制备、性能以及国内外研究进展。介绍了其应用领域和国内外应用情况,并对SWPU的发展及应用前景进行展望。()     

水性聚氨酯的交联改性技术

介绍了提高水性聚氨酯耐水性,耐溶剂性和物理机械性能的交取改性技术及最新进展。     

水性聚氨酯抗静电剂的研制

以聚醚N-210和甲苯二异氰酸酯(TDI)为主要原料,合成水性聚氨酯,再用脂肪胺聚氧乙烯醚的季铵盐衍生物改性制备得到一种水性聚氨酯抗静电剂。通过对此聚氨酯抗静电剂的性能检测,探讨了对抗静电性能影响的因素。结果表明,此抗静电水性聚氨酯有良好的抗静电性能和物理机械性能。