颜填料对建筑涂料光泽的影响

研究了颜料体积浓度和填料类型,以及用量对建筑涂料光泽的影响。     

颜填料体积浓度对水性环氧导静电防腐蚀涂层性能的影响

考察了颜填料体积浓度（PVC）对水性环氧导静电防腐蚀涂料涂层导静电性能和防腐蚀性能的影响,运用X射线能谱（EDX）分析了导电填料的元素组成,采用电化学阻抗谱（EIS）、扫描电镜（SEM）等手段对不同颜填料体积浓度的涂层进行了性能测试及表征,根据不同颜填料体积浓度涂层的物理机械性能、盐水浸泡实验结果和电化学阻抗谱分析,确定该水性环氧导静电防腐蚀涂料的最佳颜填料体积浓度为35%。     

颜填料对膨胀型防火涂料性能的影响

讨论了不同颜填料及用量对涂料防火性能的影响，采用XRD和FT-IR对涂层燃烧后的产物进行表征。结果表明：添加TiO2和可膨胀石墨后，涂层的防火性能得到明显的改善；且当TiO2和可膨胀石墨添加量分别为7．5％和4％时，炭化层的强度明显增加，涂层的防火性能最好。     

建筑节能涂料用颜填料

概述了建筑节能涂料用颜填料的材料选择,影响建筑涂料颜填料节能效应的的性能参数,建筑节能涂料颜填料研发的实施关键等,对有助于建筑节能涂料用颜填料研发和应用的纳米技术作了预测和展望。     

颜填料对环氧改性有机硅耐高温涂料综合性能的影响

以刚玉粉和钛白粉为颜填料,以环氧改性有机硅树脂为基料,制备了环氧改性有机硅耐高温涂料。研究了不同颜基比和不同颜填料配比对环氧改性有机硅树脂耐高温涂料综合性能的影响。     

颜填料对隔热涂料反射性能的影响研究

用空心玻璃珠和二氧化钛等颜填料改性硅酸铝隔热涂料,讨论了颜填料的用量、颜填料的性能如遮盖力、颜色、晶型对隔热涂料反射率的影响,确定了最佳颜填料配比,分析了影响隔热涂料热反射率的因素.     

颜料体积浓度与漆膜的性质

自从1947年Armstrong等发表了用漆膜中的颜料(包括体积颜料)在漆膜中所占的体积来考察其对漆膜性质的影响,及1949年Asbeck等提出了临界颜料体积浓度概念后,使颜料含量对漆膜性质的关系理出了规律。 颜料在漆膜中所占有的体积百分数称之为“颜料体积浓度(PVC)。当PVC逐渐增大,被颜料颗粒吸附和填满颜料颗粒间空隙后多     

高性能外墙乳胶涂料颜填料及其表面改性

从涂料的结构与组成入手,分析了国内乳胶涂料存在的问题,提出乳胶涂料的性能主要取决于涂膜结构,特别是界面结构.此外,对高性能外墙乳胶涂料用颜填料选择及其表面改性进行研究.结果表明,用两亲性高分子改性颜填料在乳液中的分散性良好,与聚合物界面粘结强.     

颜填料在水性膨胀型防火涂料中的应用研究

为了提高水性膨胀型防火涂料膨胀炭层的强度和耐火性能,考察了钛白粉与不同增强填料对水性膨胀型防火涂料性能的影响.结果 表明,钛白粉的加入可以提高水性膨胀型防火涂料的抗烧蚀性能;高岭土与氢氧化铝质量比为1∶1的混合填料具有良好的协同阻燃效果;当钛白粉加入量为10％、高岭土与氢氧化铝质量比为1∶1的混合填料的添加量为5％时,...     

超细颜填料对乳胶漆性能的影响

讨论了超细颜填料对乳胶漆性能的影响。确定了乳胶漆的最佳配方。     

The impact of pigment volume concentration on the protective performance of polyurethane coating with second generation of phosphate based anticorrosion pigment

In this study the effect of conventional zinc phosphate and zinc aluminum phosphate, which represents second generation of phosphate based anticorrosion pigments, on the performance of a polyurethane coating was studied. While zinc phosphate modification was proved to be effective on the corrosion resistance, EIS data facilitated the determination of the optimum pigment volume concentration in which the coating offered the most efficient protection. The superiority of zinc aluminum polyphosphate was attributed to the release of more inhibiting species, leading to the formation of a protective layer at the coating/substrate interface. In addition to the assessment of the impact of pigment content on the resistance of polyurethane primer to cathodic disbonding, the dependency of adhesion strength on the pigment type was also studied using pull-off test.     

一种易被忽视的涂膜病态——泪痕

对涂膜可能发生泪痕的因素进行了剖析,总结了改善和预防涂膜泪痕的方法,如增强亲水颜料的疏水处理,设计好涂料中颜料的体积浓度,适当减少铁红类颜料的用量,通过耐沾污剂改善涂膜的耐沾污性,选用疏水乳液,在涂料中添加纳米材料,施工基材做好防水处理等.     

SiO2/有机颜料双层包覆彩色铝颜料的制备及表征

以正硅酸乙酯为硅源，通过溶胶-凝胶法反应制得SiO2包覆的铝颜料，然后通过沉淀剂BaCl2·2H2O分别将有机颜料酞菁蓝或偶氮红沉淀在SiO2包覆层的表面制得具有金属光泽的无机-有机双层包覆蓝色铝颜料和红色铝颜料。采用FE-SEM、接触角和耐碱性测试对制备的SiO2包覆铝颜料和无机-有机双层包覆彩色铝颜料的性能进行表征。结果表明：SiO2首先在铝颜料表面形成一层均匀致密的亲水性包覆层，继续包覆酞菁蓝或偶氮红有机颜料层后得到的双层包覆彩色铝颜料与水的接触角由23.2°增加至80.0°左右，疏水性增加，在40 ℃、pH=9的弱碱性环境下，SiO2包覆铝颜料48 h内氢气释放量小于6 mL，彩色铝颜料小于30 mL，之后二者均趋于平稳；色卡对比和多角度色差分析仪结果证明，制备的无机-有机双层包覆彩色铝颜料具有明显的“随角异色”性，红色铝颜料的色彩饱和度大于蓝色铝颜料，且随着酞菁蓝原料的增加，蓝色铝颜料的颜色饱和度增加，但对明度的影响不大。     

耐热涂料用颜料的选择

综述了耐热涂料用颜料的特性要求 ,提出了颜料的选择方法和颜料在耐热涂料中的应用     

The role of auxiliary monomers and emulsifiers on wet scrub resistance of various latex paints at different pigment volume concentrations

This work is an attempt to study the effect of different latex types containing various auxiliary monomers and emulsifiers on their pigmentation and their corresponding behavior on scrub resistance. The auxiliary monomers investigated were acrylic acid (AA), methacrylic acid (MAA), and itaconic acid and the emulsifiers contained sodium lauryl sulfate (SLS) and sodium dodecylbenzene sulfonate (SDBS). It was shown that a semibatch polymerization technique which led to smaller particles and sharper size distributions is preferable. The best wet scrub results were obtained by using MAA and SLS. It was also shown that the proper selection of an auxiliary monomer generally depended on the range of incorporated pigment volume concentration (PVC). At high PVCs, AA gave better performances compared with MMA. The reverse effect was shown to occur at low PVCs. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

无机纳米颜料在造纸涂料中的应用

纳米材料因其四大效应已引起了广泛的关注，纳米粉体的团聚成为其工业化生产应用的瓶颈。介绍了纳米粉体的团聚、分散机理及其分散方法。阐述了无机纳米颜料在造纸涂料中的应用状况，并对其存在的问题和应用潜力作了探讨。     

Electrochemical study of protective behavior of organic coating pigmented with zinc aluminum polyphosphate as a modified zinc phosphate at different pigment volume concentrations

Electrochemical impedance spectroscopy was employed to evaluate protective performance of the solvent-borne epoxy coatings pigmented with zinc aluminum polyphosphate as a representative of phosphate-based anticorrosion compounds at different Lambda values. Furthermore, the effective ratio of the pigment volume concentration (PVC) to the critical pigment volume concentration (CPVC) was determined. To compare the function of zinc aluminum polyphosphate and zinc phosphate incorporated into coatings, electrochemical noise method as well as electrochemical impedance spectroscopy was taken into consideration. The trend and magnitude of charge transfer, coating and noise resistances plus the amplitude of the current noise fluctuation indicated superiority of the modified pigment. In order to provide an insight into the mechanism by which anticorrosion pigments improve protective behavior of coating, performance of bare metals exposed to pigment extracts was assessed through taking advantage of electrochemical impedance spectroscopy and electrochemical noise method as well.     

Microcapsule-based self-healing anticorrosive coatings: Capsule size,coating formulation,and exposure testing

Self-healing coatings is a rapidly growing research area, where focus has mainly been on development of new approaches to the mechanism of self-healing. However, there is a growing need for investigation of practical issues related to formulation, application, and testing of true self-healing coatings. In this work, ways of reducing the size of poly(urea–formaldehyde) microcapsules, filled with linseed oil and intended for a microcapsule-based self-healing anticorrosive coating (above water exposure), are explored. The influence of microcapsules on epoxy coating performance is also studied. The actual self-healing effect was not part of this work. The synthesis parameters investigated are stirrer geometry, agitation rate, temperature, and stabilizer concentration. It was found that an increase in stirring rate, correct choice of temperature, and a high stabilizer concentration all caused a decrease in microcapsule size but were accompanied by excessive formation of nanoparticles. Thus, isolation of too large microcapsules has been performed by filtration utilizing a novel low-energy fluoropolymer-coated steel sieve. An estimation of the critical pigment (microcapsule) volume concentration (CPVC) was conducted using gloss measurements and a PVC ladder and found to be about 30 vol%. Due to the rather large capsules used (relative to the coating thickness), the low CPVC value can probably be ascribed to a fairly low packing efficiency in the coating, but this needs to be confirmed. Coating performance was evaluated using salt spray exposure and impact testing. Results of the impact testing showed that addition of microcapsules to a binder matrix did not compromise resistance of the coating to mechanical damage and led to formation of fewer and shorter cracks compared to a filler-containing coating. Flaking of the coating was also reduced. Results of the salt spray testing (3 weeks exposure) showed that with an increase of microcapsule content, in the interval 30–50 vol%, the extent of corrosion and potential coating delamination decreased and was identical to that of a full commercial anticorrosive coating.     

Effect of electrolyte concentration on the tribological performance of MAO coatings on aluminum alloys

Micro-arc oxidation (MAO) is an efficient approach to improve the hardness, wear resistance, and other properties of aluminum alloys. In order to investigate the effect of the electrolyte concentration on the properties of MAO coatings for LY12 alloy, the voltage variation during the MAO process was recorded. The surface morphologies and phase compositions of the coatings produced with different electrolytes were investigated using scanning electron microscopy and X-ray diffraction, respectively. The roughness and thickness of the coatings were measured using a pocket roughness meter and an eddy-current thickness meter, respectively. The tribological performances of the coatings were investigated against GCr15 bearing steel on a ball-on-disc wear tester in open air. The results showed that with an increase in the Na₂SiO₃ content, the working voltage of the MAO process decreased, the roughness and thickness of the coatings increased significantly, and the relative content of the α-Al₂O₃ phase decreased. With an increase in the KOH content, the working voltage decreased slightly, the roughness and thickness of the coatings increased slightly, and the α- and γ-Al₂O₃ phase contents remained unchanged. The friction coefficient and wear rate of the coatings increased with an increase in the Na₂SiO₃ and KOH concentrations. A decrease in the porosity and roughness and an increase in the α-Al₂O₃ content of the coatings reduced their wear mass loss.