水性双组分聚氨酯涂料

介绍了水性双组分聚氨酯涂料的制备、性能及其应用领域。指出,它是综合性能较好的一类涂料,具有开发价值。     

双组分水性聚氨酯建筑涂料

介绍了高性能水性聚氨酯建筑涂料的研发和应用,从成膜机理、原料筛选、配方设计、性能检测、工程应用等多个方面进行了阐述,同时展望了水性聚氨酯建筑涂料的发展方向.     

水性双组分羟基丙烯酸聚氨酯涂料的研究

以苯乙烯（St）、丙烯酸丁酯（BA）、甲基丙烯酸甲酯（MMA）、丙烯酸羟丙酯（HPA）为单体,使用乳液聚合技术合成了水性羟基丙烯酸乳胶,并利用FT-IR、DSC对其进行了表征。然后使用HDI型异氰酸酯作为固化剂,配制了水性双组分聚氨酯涂料。采用FT-IR、盖尔分率、性能测试等手段,对获得的水性双组分聚氨酯涂层的分子结构、硬度、耐化学品性、固化剂用量、交联密度等进行了分析讨论。结果表明：以自制的水性羟基丙烯酸乳胶配制而成的水性双组分聚氨酯涂料,当使用固化剂比例为n(—NCO)/n(—OH)=1.3时,涂层的交联密度最大,硬度、耐化学品性等表现最佳。另外,施工和养护条件是决定水性双组分聚氨酯涂料固化反应程度和涂层性能优劣的重要因素。     

丙烯酸改性水性聚氨酯涂料的研制

采用共混方法制备了丙烯酸酯乳液改性水性聚氨酯涂料，研究了水性聚氨酯和聚丙烯酸酯乳液种类及配比对涂膜性能的影响。性能测试表明共混改性能比水性聚氨酯乳液涂膜性能有明显的提高。     

水性双组分聚氨酯涂料的研究进展

综述了水性双组分聚氨酯涂料的组成、性能和应用研究新进展。讨论了副反应对水性双组分聚氨酯涂料成膜、活化期及涂膜外观等的影响，并指出了水性聚氨酯涂料的发展趋势。     

双组分水性聚氨酯涂料的研究进展

综述了双组分水性聚氨酯涂料国内外的最新研究进展;阐述了国内外双组分水性聚氨酯涂料的羟基组分和异氰酸酯组分研究的现状;指出了存在的问题以及今后的发展趋势。     

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。     

羟基丙烯酸乳液在水性双组分聚氨酯涂料中的应用

用羟基丙烯酸乳液作为羟基组分与亲水改性多异氰酸酯配漆，制备水性双组分聚氨酯涂料。研究了丙烯酸乳液中乳化剂用量、羟值、酸值、n（—NCO）：n（—OH）对漆膜性能的影响，得到了最佳的应用配方：乳化剂用量在1％以下，羟值为100mgKOH／g，酸值在15mgKOH／g以下，n（—NCO）：n（—OH）=1．5：1。用红外光谱仪（FT-IR）表征固化前后膜的结构，表明大部分乳液聚合物已经与多异氰酸酯反应，但还有部分异氰酸酯没有反应。     

低温烘烤型双组分水性聚氨酯涂料

采用溶液聚合法，合成了丙烯酸五元共聚物；将该共聚物中的羧基中和后制成丙烯酸多元醇分散体，将其作为B组分与一种低黏度的多异氰酸酯固化剂(A组分)组成双组分水性聚氨酯涂料。研究发现：引发剂含量、羟基含量、中和度以及A、B两组分混合搅拌方式都对双组分涂膜的性能产生重要影响。当引发剂含量为1％，羟基含量为2．7％，中和度为100％，A、B组分采用机械搅拌混合时所得的涂膜综合性能最好。水性涂料的适用期达到8h，超过相应的溶剂型涂料。     

阳离子型水性丙烯酸酯聚氨酯塑料涂料的研究

合成了阳离子型羟基丙烯酸酯树脂分散体(A组分),其与多异氰酸酯固化剂(B组分)配制的双组分水性聚氨酯涂料可用于ABS、PC/ABS、PC、PVC等塑料制件的表面涂装。研究了甲基丙烯酸-N,N-二甲氨基乙酯(DMAEMA)、丙烯酸羟乙酯(HEA)用量,硬单体甲基丙烯酸甲酯与软单体丙烯酸丁酯(MMA/BA)的质量比及A、B组分(NCO/OH)物质的量比对聚氨酯涂膜性能的影响,采用FT-IR和DSC对固化膜结构进行了表征。结果表明:DMAEMA用量为5%,HEA用量为15%,m(MMA)/m(BA)=2,n(NCO)/n(OH)=1.2~1.4可得到力学性能、耐水性、耐化学品性优秀的涂膜。     

水性双组分丙烯酸-聚氨酯的合成与表征

使用相转化法,即将水溶性丙烯酸树脂和HDI缩二脲混合,然后加水稀释转相,制备了水性双组分丙烯酸聚氨酯。研究了丙烯酸树脂配方对双组分聚氨酯性能的影响,并用红外光谱(FTIR)对涂膜固化进行了表征。结果表明,以丙二醇甲醚醋酸酯为溶剂,在羟值为120 mgKOH·g-1、酸值为30 mgKOH·g-1的水溶性丙烯酸树脂中,添加10 %的甲基丙烯酸异冰片酯,获得的双组分聚氨酯乳液粒径小。室温干燥12 h,固化反应完成,涂膜交联密度高。     

A selective catalyst for two-component waterborne polyurethane coatings

The potential for formulating low VOC, high performance, two-component waterborne isocyanate crosslinked coatings has generated a great deal of interest. The difficulties in formulating these coatings, however, are significant. A major problem associated with such systems is the isocyanate-water side reaction, which can lead to gassing/foaming, loss of isocyanate functionality, low gloss, and a reduced pot life. To compensate for this side reaction, these formulations usually contain a large excess of isocyanate. One novel approach to control the water side reaction is the use of catalysts which selectively catalyze the isocyanate-polyol reaction and not the isocyanate-water reaction. The selectivity of a variety of metal catalysts to catalyze the preferred reaction was measured using an FTIR method. A zirconium complex has shown unusually high selectivity for the isocyanate-polyol reaction in comparison to the standard dibutyltin dilaurate catalyst. This zirconium complex catalyst has been evaluated in several waterborne polyurethane formulations and has demonstrated less gassing/foaming, longer pot life, and higher gloss than dibutyltin dilaurate at equal cure time. The mechanism of catalysis and formulating techniques of this novel zirconium catalyst will be discussed. Presented at the International Waterborne, High-Solids, and Powder Coatings Symposium, February 10–12, 1999, New Orleans, LA. Science Rd., Norwalk, CT 06852.     

Novel ambient temperature curable two-component waterborne silicone-acrylic coatings

Waterborne coatings are composed of resins containing hydrophilic functional groups. These groups usually remain in the coating film and can adversely affect film properties such as weatherability and resistance to water and alkali. We have developed a novel ambient temperature curable waterborne two-component system, in which the hydrophilic functional groups are consumed by the crosslinking reaction. The new coating system consists of a waterborne acrylic resin containing both tert-amino and carboxylic acid groups and a hardener containing both epoxy and alkoxysilyl groups. The waterborne silicone acrylic coatings provide superior film properties even if the acrylic resin has relatively low functional group content. In this paper we describe the crosslinking reaction mechanism and film properties using some acrylic resin types and paint formulations as examples. Presented at the 24th Annual Waterborne, High-Solids, and Powder Coatings Symposium, on February 5–7, 1997, in New Orleans, LA. 1-3 Takasago, Takaishi-shi, Osaka, Japan.     

水性聚氨酯涂料催化剂研究进展

随着环保意识的逐渐加强,水性聚氨酯涂料越来越受到重视.催化剂是水性聚氨酯涂料的重要组成部分.本文综述了水性聚氨酯催化剂(包括胺类催化剂、金属有机化合物类催化剂和复合催化剂等)的研究状况.     

建筑用水性聚氨酯涂料的研究进展

综述了建筑用水性聚氨酯(WPU)涂料的改性技术的研究进展,其改性技术包括交联改性、丙烯酸酯改性、环氧树脂改性、植物油改性和纳米材料改性等,并对建筑用WPU涂料的发展前景作了展望。     

水性聚氨酯木器涂料改性研究进展

水性聚氨酯木器漆具有良好的性能，是目前水性木器漆研发的一个热点和重点。介绍了单组分水性聚氨酯涂料和双组分水性聚氨酯涂料的制备和性能，综述了水性聚氨酯木器涂料的改性研究进展。     

环保型水性涂料研究进展及发展趋势

本文综述了近年来国内外相关各类环保型水性涂料的研究进展与成果,介绍了水性聚氨酯、水性丙烯酸树脂、水性环氧树脂及其改性树脂在涂料中的应用,并对水性涂料在未来工业应用中的发展前景和方向作出了展望。     

水性聚氨酯树脂在工业水性涂料中的应用进展

综述了工业用水性聚氨酯涂料的主要应用领域。主要介绍了水性聚氨酯涂料目前改性研究的现状,如防腐防锈涂料、防水涂料、防火涂料、抗外力涂料、防污涂料、新型智能化涂料等改性研究。最后,根据我国国情,阐述了水性聚氨酯涂料未来的发展方向。     

Application of a silicone-modified acrylic emulsion in two-component waterborne polyurethane coatings

Two-component waterborne polyurethane (2K WBPU) coatings were prepared using a silicone-modified acrylic emulsion as the hydroxyl component, and hydrophilically-modified polyisocyanate as the curing agent. The effects of the levels of silicone monomer and hydroxyl values on the film properties of the 2K WBPU coatings were investigated. Infrared spectroscopy characterized its structure. Scanning electron microscopy (SEM), thermo-gravimetric analysis (TGA), and differential scanning calorimetry (DSC) were used to study the surface morphology and the thermal stability of the film. The results showed that the performance of the coatings and the thermal stability of the film of 2K WBPU were improved after silicone modification.