醇溶性无机富锌涂料的研制

醇溶性无机富锌涂料是以硅酸乙酯水解液为A组分,聚乙烯醇缩丁醛为B组分基料,配以锌粉以及其他填料、助刺、溶剂等制成。简要阐述了醇溶性富锌涂料成膜机理和对硅酸乙酯水解配方的研究,以及锌粉添加量对防腐性能的影响。     

Chloride-free biodegradable organic acid hydrolyzed zinc silicate coating

Partially hydrolyzed ethyl silicate has widely been used as a binder to formulate inorganic zinc silicate paint for anticorrosive coating applications. Hydrochloric acid is used most popularly to catalyze the hydrolysis of ethyl silicate. Although different acids have been tried as catalysts for ethyl silicate hydrolysis, no attempt has been made to make stable paints out of those hydrolyzed silicate binders. In this study, environment benign biodegradable organic acids such as oxalic acid, citric acid, lactic acid and acetic acid were used for the hydrolysis of ethyl silicate and compared with the hydrolysis using conventional hydrochloric acid. The hydrolyzed silicate sols were pigmented further with silica powder and evaluated for their stability. Of the various organic acids catalyst used, only oxalic acid catalyzed sol acted as a stable binder system. The pigmented binder was then mixed with metallic zinc to formulate anticorrosive inorganic zinc silicate paint. The resultant coatings were characterized for various physical, surface, mechanical and chemical resistance properties such as drying, hardness, adhesion (cross hatch) and solvent resistance. Corrosion resistance properties were analyzed by means of salt spray, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS). The results revealed that the physical, mechanical, chemical and anticorrosive properties of the coating hydrolyzed with hydrochloric acid and oxalic acid are comparable. Thus, a chloride free biodegradable organic acid hydrolyzed inorganic zinc silicate primer is reported and due to its long term stability same also can be scaled up commercially.     

硅酸盐矿物/TiB2复相陶瓷涂层的制备及耐蚀性能研究

本文采用热化学反应法在Q235钢基体表面分别制备了硅酸盐矿物陶瓷涂层和添加Al-TiO2-B2O3反应体系复相陶瓷涂层,用XRD分析其相结构,并研究了涂层的耐蚀性。结果表明,硅酸盐矿物/TiB2复相陶瓷涂层有TiB2、FeNi3、CaNi0.5Si1.5等新相产生。耐酸、碱、盐性相对基体分别提高8.6倍,4.4倍,6.2倍,耐蚀性优于纯硅酸盐矿物涂层。     

Studies on corrosion resistant properties of sacrificial primed IPN coating systems in comparison with epoxy–PU systems

The continuous development in the field of protective coatings and the search for newer materials with improved properties have led to the emergence of interpenetrating polymer networks (IPNs) as binders for high performance organic coatings for corrosion protection. In this study, one such ambient curing IPN polymer alloy poly(epoxy–urethane–acrylate) developed specially for use in protective coatings has been studied. Undercoat and a topcoat based on the alloy have been formulated and coated over zinc ethyl silicate primed steel surfaces. Similar formulations based on an epoxy polyamide undercoat and a PU topcoat has been formulated and coated over zinc ethyl silicate primed steel surfaces. Both the systems were evaluated for their physical and corrosion resistant properties by subjecting them to accelerated laboratory tests and field test at a corrosive location. The results are reported and conclusions drawn in this paper.     

氧化铝增强无机硅酸锌涂层的电化学阻抗谱研究

无机硅酸锌涂层是一种广泛使用的钢铁重防腐涂层。采用在涂料填料中加入氧化铝的方法可以得到具有更好耐磨性能的富锌涂层。本实验研究利用电化学阻抗谱法(EIS)研究了氧化铝的加入对涂层腐蚀防护性能的影响,结果表明氧化铝颗粒的加入使涂层的腐蚀防护性能略有提高。     

氯化石蜡在水性钢结构防火涂料中的应用

考察了氯化石蜡(氯烃-70)在水性钢结构防火涂料中的应用情况。结果表明，氯烃-70能明显增加涂层的发泡倍率，其在防火体系中的含量越高，涂层的耐火性能越好，但同时发泡层强度下降，添加少量的硅酸铝纤维可以有效地解决发泡层强度下降的问题。     

超微细滑石粉在硅酸盐涂料中的应用

考察了不同细度的滑石粉对硅酸盐涂料成膜性的影响。     

GC/MC法分析正硅酸乙酯

用气相色谱法对样品进行分析，得到了四个完全分离的色谱峰。采用色／质联用技术(GC／MC)确定这四个峰分别为乙醇、正硅酸乙酯、二聚硅酸乙酯、三聚硅酸乙酯，并测定了它们的相对含量。     

新型环氧硅酸酯防腐涂料的研制

将环氧树脂和硅酸酯预聚物通过催化缩合反应,制得环氧硅酸酯涂料,兼有有机和无机涂料的优点,具有高硬度、高耐磨、高附着力、优异的抗渗性、抗溶剂溶胀、抗介质氧化等性能。本文介绍了环氧硅酸酯树脂的合成以及环氧硅酸酯新型防腐涂料的制备。     

硅丙乳液改性高模数硅酸钾水性无机富锌涂料的研究

以硅溶胶、氢氧化钾为主要原料,硅丙乳液为改性剂,制备了一种稳定的高模数硅酸钾有机-无机复合基料,与锌粉以1∶2比例配制高模数硅酸钾水性无机富锌涂料.探讨了模数、固含量、反应时间、硅丙乳液用量对高模数硅酸钾溶液贮存稳定性和涂料性能的影响.采用正交实验的方法,确定了涂料的最优工艺条件.制备的水性无机富锌涂料是一种经济实用的绿色涂料.     

硅酸乙酯生产工艺进展述评及其半连续化生产工艺的开发

综述了硅酸乙酯几种工业生产工艺,对其特点进行了评述,并介绍了作者开发的半连续化生产新工艺。     

水性无机富锌涂料的研制

以低模数的硅酸钾溶液和硅溶胶为原料,制备成稳定性良好的高模数硅酸钾溶液。讨论了温度、硅烷偶联剂种类和搅拌速度等因素对制备高模数硅酸钾溶液的影响。比较了研制的水性无机富锌涂料和国内外同类产品的性能。介绍了水性无机富锌涂料的施工工艺。     

无机硅酸锌预涂底漆的研制

介绍了无机硅酸锌预涂底漆成膜机理、硅酸乙酯水解、改性及主剂的制备。通过对硅酸乙酯改性,增加了无机硅酸锌预涂底漆漆膜的柔韧性;采用耐盐雾实验选择了防锈颜料磷酸锌、B-004磷铁粉及5%的锌粉添加量;通过对比无机硅酸预涂底漆的施工性、耐盐雾性及储存稳定性,确定了聚乙烯缩丁醛树脂液的加量,选用了HX-8800和BYK-420作为产品防沉剂,调整溶剂体系添加1%CB溶剂控制漆膜干燥速度,并最终确定了产品配方。此产品满足流水线自动喷涂工艺,干燥时间短、防锈性能好、可与多种面漆配套使用,并且不影响焊接和切割。     

Influence of fireproof coatings on electrical properties of conducting materials and related constructions

The experimental results on the design of fireproof coatings based on paint and varnish silicate composites and starch solutions oxidized by oxygen are reported. The water glass modified by ethyl silicate is used as a silicate coating. These coatings on paper samples and the surface of other porous materials, such as fabrics and polyurethane foam samples, are foamed in contact with a flame and form a layer that prevents propagation of the burning front. It is revealed that the treatment of conducting materials with fireproof composites does not lead to a substantial change in their surface resistance in the microwave range.     

水性无机建筑涂料热贮存稳定性的影响因素探讨

以胶体二氧化硅溶液和改性液态硅酸钾为主要无机成膜物质,苯丙乳液为有机改性剂、合成硅酸镁锂为增稠防沉剂、以金红石型钛白粉、煅烧高岭土、重质碳酸钙、滑石粉等为颜填料制备了一种性能优异、热贮存稳定性良好的水性无机建筑涂料,讨论了胶体二氧化硅和改性硅酸钾的种类、不同增稠剂、改性有机高聚物乳液、颜填料等对其热贮存稳定性的影响,并对涂层的施工性能,耐洗刷性能、耐水、耐碱性能等进行了评估。     

模数对无机富锌涂料和涂层性能的影响

硅酸钾富锌涂料是目前广泛使用的钢铁防腐蚀涂料。作为涂料粘结剂的高模数硅酸钾溶液对涂料和涂层的性能有重要影响。本研究考察了硅酸钾粘结剂的模数变化对涂料及涂层性能产生的影响。实验结果表明：粘结剂模数的提高可以提高固化后涂层的耐水性能，当粘结剂模数在5.0左右时，所得富锌涂层具有最佳的耐磨性能，但当粘结剂模数超过5.5时会造成涂料施工性能和贮存稳定性下降，涂层柔韧性降低，从而降低涂层的耐磨性能。     

几种激发剂对钢渣活性的影响

钢渣水化速率慢是限制其应用的主要因素,通过不同掺量和细度的钢渣与芒硝、水玻璃、木质素磺酸钙三种激发剂的反应情况,研究各种激发剂对钢渣水化活性的影响。实验结果表明,(1)掺入激发剂后,对钢渣水化活性有较大影响;(2)试验条件下钢渣比表面积为475.7m2/kg时,掺入10%钢渣、3%芒硝、2%水玻璃、0.6%木质素磺酸钙对钢渣水化活性激发效果最好。     

红外遮光剂对硅酸盐隔热保温涂料性能的影响

分别选取六钛酸钾晶须(PTW),金红石型二氧化钛(TiO2)和钛溶胶作为红外遮光剂,以九水合硅酸钠为粘结剂,添加SiO2气凝胶等隔热填料,用机械搅拌的方法制备出硅酸盐隔热保温涂料.研究了红外遮光剂对涂料红外透过率,消光系数和导热系数的影响.结果表明:三种红外遮光剂中,钛溶胶分散性最好,掺杂钛溶胶的涂料红外透过率最低,消光系数最大,导热系数最低,可降低至0.032 W·m-1·K-1.     

耐水的硅酸盐膨胀型防火涂料的研制

优选出防火性能优良的以水玻璃为基料的膨胀型防火涂料的配方，并找到添加硅氧烷酯以改进耐水性的方法。     

无毒防污涂料的研究进展

介绍了低表面能防污涂料、生物防污涂料、无毒硅酸盐防污涂料等新型的无毒防污涂料的研究进展，并展望了无毒防污涂料的发展趋势。