松香在聚氨酯涂料中的直接应用

研究了把松香直接并入NCO/OH型双组分聚氨酯涂料的羟基组分中的技术可行性,探讨了配方设计、助剂应用及漆膜固化机制。与松香在聚氨酯涂料中的其他应用途径相比,该方法具有节能减废、降低成本的优点。     

聚氨酯/聚苯胺导电复合材料的制备与应用

概述了聚氨酯与新型导电聚合物聚苯胺的复合材料的制备原理、工艺及性能等,包括聚氨酯内部渗透法、聚苯胺包裹法、共聚/接枝及化学氧化/电化学聚合等,对应用不同制备方法制作的聚氨酯/聚苯胺导电复合材料的性能做了比较,并对聚氨酯/聚苯胺导电复合材料的研究前沿和应用前景做了介绍。     

透明隔热纳米复合涂料的助剂筛选及性能研究

以KH550改性的纳米锑掺杂氧化锡粉体(ATO)与Bayhydrol XP 2593水性聚氨酯(WPU)分散体为原料,与成膜助剂、消泡剂、流平剂、附着力促进剂等复配,通过正交试验优化复合涂料的配方,制得了分散稳定的水性纳米ATO/聚氨酯复合涂料。助剂配方正交优化结果表明,以二乙二醇乙醚为成膜助剂、用量约3.0%,以Z-6040为附着力促进剂、用量约4.0%,以BYK094为消泡剂、用量约0.05%,以Du Pont FSJ为流平剂、用量约0.1%,以WT-207为增稠剂、用量约0.06%,可以制得综合性能良好的ATO/WPU复合涂料,其涂膜铅笔硬度可达H、附着力1级,可见光透过率为83.6%,隔热效果良好,降温可达6.5°C。     

纳米氧化锡锑/UV固化水性聚氨酯隔热涂料的制备及其性能表征

以聚酯二元醇、异佛尔酮二异氰酸酯、二羟甲基丙酸、季戊四醇三丙烯酸酯(PETA)等为原料,制备了具有感光性能的水性聚氨酯丙烯酸酯预聚体(PUA),通过溶胶-凝胶法对采用硅烷偶联剂KH570对纳米氧化锡锑(ATO)进行改性,然后将改性纳米ATO与PUA加水乳化制得纳米WPUA/ATO复合乳液,最后通过UV固化制得WPUA/ATO涂膜,研究了ATO含量对WPUA/ATO涂膜性能的影响。结果表明,随着纳米ATO含量增加,可见光平均透过率降低,红外光平均屏蔽率增加;其中当纳米WPUA/ATO复合乳液中ATO质量含量为9%时,可见光平均透过率为71.43%,红外光平均屏蔽率高达为79.69%,隔热性能较好,特别适合制备涂膜隔热玻璃。     

聚氨酯改性环氧树脂的制备及其在涂料中的应用

制备了聚氨酯改性环氧树脂,对其结构进行了表征,测试了以其制备的涂料的性能,结果表明:引入聚氨酯链段可以改善环氧树脂的韧性,对耐热性影响很小,涂料综合性能良好。     

聚氨酯涂料及其应用

叙述了聚氨酯涂料用新型二异氰酸酯，涂料用异氰酸酯预聚物的发展趋势，聚氨酯产及其在各个领域的应用概况。     

聚氨酯改性油基涂料的制备

1．概述最早研究成功的聚氨酯单组份涂料即为氧’固化聚氨酯改性油（简单称为氨酯油），它是由于性油与多元醇进行醇交换反应（醇解），再与二异氰酸酯反应，加入钴、铅或锰等催干剂以及防结皮剂制备而成。该涂料是以油脂的不饱和双键在空气中干燥的涂料。氨酯油因为其特定的化学结构，使之与醇酸树脂涂料相比，具有干燥时间短，耐磨性好，耐水解及耐酸、盐、碱性较好的特点；这主要是因为氨酯键间可以形成次价键氢纯可视为一种所谓交联点，而醇酸树脂的键间则不能形成氢键，分子间的内聚力较小。而且氨酯油中不含游离的异氰酸酯基。所以贮…     

导电聚合物/聚氨酯复合材料的研究进展

概述了国内外聚苯胺(PANI)/聚氨酯、聚吡咯(PPy)/聚氨酯、聚噻吩(PTh)及其衍生物/聚氨酯复合材料的研究近况,并对这几类导电聚合物(CP)/聚氨酯(PU)复合材料的优缺点进行了总结,最后展望了CP/PU复合材料的应用前景。     

Effectiveness of PANI/Cu/TiO2 ternary nanocomposite on antibacterial and antistatic behaviors in polyurethane coatings

Surfaces with antibacterial and antistatic functionalities are one of the new demands of todays' industry. Therefore, a facile method for the preparation of multifunctional polyaniline/copper/TiO₂ (PANI/Cu/TiO₂) ternary nanocomposite based on in situ polymerization is presented. This nanocomposite was characterized through the different techniques and was utilized for induction of antibacterial and antistatic properties in polyurethane coatings. Measurement of the conductivity of PANI/Cu/TiO₂ ternary nanocomposite indicated higher electrical conductivity of this nanocomposite compared to pure PANI. The antibacterial activity of the modified polyurethane coatings was tested against Gram-positive and Gram-negative bacteria which led to remarkable reduction in bacterial growth. Besides, it was observed that polyurethane coating with 2 wt % content of ternary nanocomposite has a surface electrical resistance equal 4 × 10⁸ Ω/sq which acquires surface electrical resistance of standard antistatic coatings. The final coatings were also characterized in terms of thermal and mechanical properties to investigate the effect of the ternary nanocomposite on improvement of these properties. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48825.     

改性高岭土/水性聚氨酯复合材料的制备与表征

采用钛酸酯偶联剂干法改性高岭土,配成母液,用此母液乳化中和后的聚氨酯预聚体,制得改性高岭土/水性聚氨酯复合材料(WPUM)。研究了复合材料的乳液粒径、胶膜力学性能、结晶性和热稳定性等性能。结果表明:复合材料乳液粒径随着改性高岭土质量分数的增加,先增加后减小;改性高岭土的加入可以明显提高水性聚氨酯胶膜的力学性能,当改性高岭土质量分数为1.6%时,复合材料的断裂伸长率与纯聚氨酯胶膜相比提高了13%;X射线衍射法(XRD)分析结果显示,改性高岭土促进了聚氨酯的微相分离;热重分析法(TG)、差示热重法(DTG)分析结果表明,水性聚氨酯复合材料胶膜热分解的起始温度无变化,硬段最高热失重温度略有降低。     

碳纳米管/聚氨酯功能复合材料的制备与应用

介绍了碳纳米管的处理、碳纳米管/聚氨酯复合材料的制备方法：碳纳米管的处理方法有表面处理改性和局部活化改性2种; 碳纳米管/聚氨酯复合材料的制备方法有物理共混法和原位聚合法。结合碳纳米管和聚氨酯的特性,综述了碳纳米管/聚氨酯复合材料在力学性能的增强、电子材料、智能材料、生物医学材料和节能材料等方面的应用,并对CNTs/PU复合材料未来的研究工作提出了几点意见。     

含氟聚氨酯树脂涂料的制备及应用

本文介绍了可溶性的带痉基含氟烯烃的合成及含氟聚氨酯涂料的制备，含氟聚氨酯涂料具有优异的耐候性，保色性及耐热，耐腐蚀，耐化学性，可用于建筑，储罐，船舶和飞机等领域。     

Synthesis and characterization of eco-friendly siloxane-semifluorinated polyurethane coatings for underwater application

Siloxane-semifluorinated polyurethane coatings were prepared for robust underwater application. Initially, acrylic polyol (FS-GPTACP)-containing fluoroalkoxysilane (1H,1H,2H,2H-Perfluorooctyltrimethoxysilane) pendant group was synthesized by the free-radical polymerization method. Different weight percentages of polydimethylsiloxane (0, 10, and 20 wt %) were added to the polyol to tune the mechanical and the surface energy of the coating. Subsequently, this polyol mixture was cured with 4, 4′-methylenebis(cyclohexyl isocyanate) (H₁₂MDI) to prepare a series of siloxane-semifluorinated polyurethane–urea hybrid coatings (APUS 0%, APUS 10%, and APUS 20%). The synthesized coating showed low surface energy, hydrophobicity with exceptional water, and alkali resistance. Moreover, the coating displayed excellent mechanical properties with low pseudobarnacle adhesion strength. The coatings also showed nontoxicity against gram-positive and gram-negative bacterial strains. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47720.     

Novel polyurethane elastomer continuous carbon fiber composites: Preparation and characterization

Preparation and characterization of novel polyurethane (PUR)–carbon fiber (CF) composites are reported. The reinforcement of PUR elastomers was achieved using unidirectional continuous CFs with different coatings (uncoated and epoxy and polyester resin coatings) by applying molding for the preparation of PUR‐CF composites. Considerable reinforcement of PUR was attained even at relatively low CF content, e.g., maximum stress and Young's modulus of PUR‐CF composite at CF content 3% (m/m) were found to be 3–5 and 4–10 times higher than those of the PUR‐matrix, respectively. In addition, a linear relationship between the Young's modulus and the CF content was found as well as linear variation of maximum stress with the CF content was also observed. The adhesion of CF to the PUR‐matrix was strong in each case as concluded from the strain–stress and the scanning electron microscopy (SEM) investigations. However, the extent of reinforcement of PUR at a given CF content was found to depend greatly on the coatings of CF, and increased in the following order: epoxy resin < polyester resin < uncoated. The effect of the coating of CF on the reinforcement of PUR is also discussed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 287–292, 2007     

聚氨酯改性环氧树脂耐磨涂料的研制

以2,4-甲苯二异氰酸酯和蓖麻油为原料,合成了聚氨酯预聚体。使用该聚氨酯预聚体对环氧树脂进行了改性。对各种固化剂进行了筛选。最后研制了一种双组分常温固化耐磨涂料。通过正交实验和单因素实验确定了涂料的最佳配方:聚氨酯5 g,环氧树脂10 g,填料3 g,固化剂2．3 g。由此获得的耐磨性优良的涂膜性能为:表干时间10 h,实干时间不到40 h;耐磨性实验中,磨痕弦长5．4 mm;附着力0级,硬度5 H。     

Preparation and physical properties of two-component polyurethane flame-retardant coatings using trichloro modified polyesters

Trichloro modified polyester polyols were synthesized by two-step condensation reactions. An intermediate compound was synthesized by the esterification of trichloroacetic acid with trimethylolpropane in the first step. In the next step, polycondensation of the intermediate, 1,4-butanediol and trimethylolpropane with adipic acid was carried out. Two-component flame-retardant polyurethane coatings were prepared by blending these modified polyester polyols and polyisocyanate. The physical properties of these new coatings were comparable to non-flame-retardant coatings. They showed a drying time of 3–4 h and a pot life time of 10–13 h, which could belong to the flame-retardant coatings with long pot life times. Coating with 20 wt % trichloroacetic acid showed a self-extinguishing property in the vertical burning test. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 913–920, 1998     

水性聚氨酯涂料的制备与性能研究

以甲苯-2,4-二异氰酸酯(TD I)、聚醚Ng 210和二羟甲基丙酸(DMPA)为主要原料,制得不含或含少量有机溶剂的水性聚氨酯乳液,研究了NCO/OH的摩尔比、DMPA含量等对水性聚氨酯乳液性能的影响。结果表明,当NCO∶OH(摩尔比)=2.5∶1,DMPA=5%时,乳液性能最佳。     

Two-component water reducible polyurethane coatings

Historically, polyurethane coatings have been formulated as two-component organic solvent based systems. These polyurethane coatings provide room temperature cure characteristics as well as an excellent combination of abrasion resistance, flexibility, adhesion, chemical resistance and appearance. However, the coatings industry is under increasing pressure to reduce the environmentally undesirable emission of volatile organic compounds (VOC). One way of doing this is to replace some or all of the organic solvent with water. However, in the case of isocyanate crosslinked polyurethane coatings this is not a straightforward matter due to the fact that unmodified isocyanates are not only reactive with water, but are hydrophobic and non-dispersible.