国外交联水性聚氨酯涂料研制进展

从双组分热固型水性聚氨酯涂料、含封闭异氰酸酯的水性聚氨酯涂料、室温固化双组分水性聚氨酯涂料、挥发型低度交联水性聚氨酯涂料和光固化水性聚氨酯涂料五方面,阐述了交联水性聚氨酯涂料的国外研制进展。     

单组分室温自交联聚氨酯水分散体的制备及其性能研究

介绍了国内外单组分自交联聚氨酯水分散体的交联固化技术。通过对交联型、热塑型水性聚氨酯漆膜的萃出率、溶胀率进行对比,以及对交联型水性聚氨酯漆膜的综合性能进行测试,表明了单组分室温自交联聚氨酯水分散体制备工艺、性能的优越性。     

水性聚氨酯涂料发展迅速市场前景乐观

水性聚氨酯是一种环境友好型高分子材料。根据水性聚氨酯涂料将成为未来涂料产业的发展趋势,论述了水性聚氨酯广阔的市场空间,介绍了水性聚氨酯涂料的性能特点和主要应用领域,研究了水性聚氨酯木器漆常用的交联方法;并指出了水性聚氨酯木器漆的发展方向。     

水性聚氨酯涂料的研究现状与发展趋势

对线形和交联型水性聚氨酯的微观物理化学结构及其研究现状进行了综述。考察了线形分子及交联体系的内部微观结构与性能的关系，并对水性聚氨酯涂料在某些领域的应用现状及发展趋势进行了探讨，同时指出了水性聚氨酯涂料在发展过程中本身存在的问题与缺陷。     

交联型与线形水性聚氨酯的形状记忆性能比较

由聚酯多元醇、2,4–甲苯二异氰酸酯、二羟甲基丙酸等合成了水性聚氨酯乳液,对乳液性能进行了研究;对制得的聚氨酯胶膜进行了红外分析、DSC测试和形状记忆性能测试;用丙三醇和三羟甲基丙烷作为扩链制得的交联水性聚氨酯与用1,4–丁二醇制得的线形水性聚氨酯进行了性能比较,结果表明:不同扩链剂对水性聚氨酯的性能有一定的影响,与线形水性聚氨酯相比,交联型水性聚氨酯具有较好的形状记忆性能,形状恢复率可达92%～97%。     

聚氨酯文献题录(五十四)

耐热型聚氨酯弹性体研究进展.化学推进剂与高分子材料,2013,11（6）：35-39.交联型水性聚氨酯的合成与研究.粘接,2014（3）：64-67.聚酯型水性聚氨酯的合成和性能研究.粘接,2014（3）：68-71．丙烯酸酯改性水性聚氨酯复合乳液的研究进展．粘接,2014（3）：87-89。     

复合薄膜用双组分水性聚氨酯胶黏剂的制备和性能

制备了复合薄膜用双组分水性聚氨酯胶黏剂,初步研究了两种外加型交联剂环氧树脂6360、三聚氰胺-甲醛树脂对胶黏剂性能的影响。红外谱图和差示扫描量热法分析的结果表明在双组分水性聚氨酯胶黏剂中水性聚氨酯和交联剂发生了交联反应。外加交联剂可增加水性聚氨酯胶黏剂的交联度和黏度,从而有效提高胶黏剂的T型剥离强度和耐溶剂性能。环氧树脂较佳加入量在5%左右而三聚氰胺-甲醛树脂约为10%。由双组分水性聚氨酯胶黏剂黏合的PET/PE薄膜在较高温度下适当处理一段时间,其黏合效果更佳。     

水性聚氨酯树脂的改性及应用研究

研究了水性聚氨酯的扩链、交联、丙烯酸酯复合等改性方法以及水性聚氨酯木器漆的研制。结果表明：对水性聚氨酯进行扩链、交联以及丙烯酸酯复合改性,能显著提高水性聚氨酯的拉伸强度、硬度、耐磨性、耐水耐醇性。经检测,用改性水性聚氨酯树脂配制的木器漆主要性能均达到聚酯聚氨酯木器漆行业标准（HG／T3608-1999）。     

水性聚氨酯新进展

综述了８０年代以来水性聚氨酯研究的新进展。介绍了单组分水性聚氨酯、双组分水性聚氨酯、水性聚氨酯改性材料的特点和主要合成方法。水性聚氨酯的合成方法，以丙酮法、预聚体扩散法和熔融分散法为主。单组分水性聚氨酯主要包括线型和交联型二种。为了获得较低温度下的优良性能，９０年代双组分水性聚氨酯受到更多的重视，其研究重点是减少副反应，增加反应的选择性及在潮湿、低温环境下成膜。     

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     

乙烯基单体改性水性聚氨酯的研究

以聚酯多元醇、异佛尔酮二异氰酸酯、二羟基丙酸等为原料,采用丙酮法制备了水性聚氨酯乳液,分别用甲基丙烯酸单体（MMA）、苯乙烯（St）、甲基丙烯酸六氟丁酯（FA）对其进行了改性,得到了一系列核壳结构的改性水性聚氨酯乳液,并对改性产物进行了结构表征和性能测定,结果表明：改性后的水性聚氨酯乳液形成的涂膜具有更好的机械性能、耐水性能以及耐热性能等,应用范围更广。     

Influence of the hard-to-soft segment ratio on the adhesion of water-borne polyurethane adhesive

Three water-borne polyurethane dispersions were synthesised by the pre-polymer mixing process. Different hard segment contents in the polyurethanes were obtained by varying the diisocyanate/macroglycol (NCO/OH) molar ratio. A decrease in the NCO/OH ratio produced an increase in the mean particle size and in the pre-polymer viscosity, as well as a decrease in the molecular weight of the polyurethane. On the other hand, the lower the NCO/OH ratio, the more crystalline the polyurethane and the lower the resistance to flow at high temperature. Lower NCO/OH ratios improved the thermal degradation stability of the polyurethane. Finally, a high initial adhesion to PVC was obtained in all joints produced with the aqueous polyurethane dispersions and the final adhesion increased as the NCO/OH ratio in the water-borne polyurethane adhesive decreased.     

Oxazolidines and tetramethylxylenediisocyanate based polyurethanes in legislation-compliant anticorrosion coatings

Conclusion  The use of polyurethanes continues to expand and newer technology has fuelled this growth. The development and commercial introduction of new isocyanates such as TMXDI™ has also spurred on development of polyurethane technology. The Environmental Protection Act (1990), at first sight might seem to hamper formulators. This need not be the case as the legislation can be viewed positively, especially by those companies operating in niche markets. Oxazolidines offer an important newer technology route that formulators may utilise in combination with polyurethanes. There is little doubt that the future appears rosy for polyurethanes as high solids and water-borne versions are already available and continue to be developed. TMXDI™ is the trademark of Cytec Industries. Work carried out by Industrial Copolymers Ltd, PO Box 347, Prirnrose Hill, Preston PR1 4LT, United Kingdom     

木器涂料用水性聚氨酯研究进展

综述了当前木器涂料用水性聚氨酯的研究进展,重点介绍了水性聚氨酯-丙烯酸酯、UV固化水性聚氨酯、双组分水性聚氨酯以及水性聚氨酯改性的研究进展。     

单组分水性聚氨酯涂料的研究进展

从阴离子型单组分水性聚氨酯涂料、阳离子型单组分水性聚氨酯涂料和改性单组分水性聚氨酯涂料三个方面分别阐述了单组分水性聚氨酯涂料近年来的研究概况。     

水性聚氨酯涂料的原料、制备及应用(一)水性聚氨酯涂料的原料及制备方法

本文介绍了水性聚氨酯涂料的发展现状、水性聚氨酯涂料的分类和原材料 ,阐述了水性聚氨酯涂料的制备方法及其成膜机理。     

水性聚氨酯表面活性剂的研究进展

介绍了水性聚氨酯表面活性剂的分类,重点对近年来国内外各种类型水性聚氨酯表面活性剂的合成研究进展进行了综述,并对水性聚氨酯表面活性剂的开发应用前景作了展望。     

MDI型水性固化剂将开创双组分水性聚氨酯涂料发展新局面

从理论上探讨了MDI型水性固化剂生产的可行性,提出了MDI型水性固化剂的设计思路,针对MDI型水性固化剂应用的困难提出了解决办法。旨在提出MDI型水性固化剂合成新思路,降低水性固化剂成本,促进双组分水性聚氨酯涂料应用。MDI型水性固化剂成功开发与应用,将与脂肪族水性固化剂相互补充和促进,并开创双组分水性聚氨酯涂料局面。     

Three-dimensional compositional gradients in water-borne urethanes and latexes: spectroscopic approaches

Stratification of individual components in thermosetting coatings plays an important role during film formation and affects a number of macroscopic properties. This behavior is particularly pronounced for water-borne coatings, and therefore molecular level understanding of interactions in latexes and responsiveness of individual components during coalescence of water-borne polyurethanes are of particular interest. The presence of macromolecular arrangements and interactions among various components near the film–air (F–A) and the film–substrate (F–S) interfaces can be effectively monitored using attenuated total reflectance (ATR) and step-scan photoacoustic (SSPA) Fourier transform infrared (FT-IR) spectroscopy. Both approaches are capable of obtaining information from various surface depths and complement each other if one seeks molecular level information from 0 to 150 μm into the film. In this presentation combined ATR and PA information along with IR and/or Raman surface imaging will be presented to establish three-dimensional representation of polyurethane film formation and the effect of copolymer/polymer blend latexes on coalescence processes in Sty/n-BA.     

水性聚氨酯合成工艺研究进展

介绍了水性聚氨酯的各种合成工艺,分析了其各种工艺的优缺点,最后介绍了国内水性聚氨酯的研究现状、存在问题及前景。