水性涂料用铝粉颜料的改性

分别以KH-550、丙烯酸树脂和两者的混合物对铝粉表面进行包覆改性,研究了不同包覆铝粉的耐酸性能,结果发现,以KH-550/丙烯酸树脂共同包覆的铝粉具有更好的耐酸性能。红外光谱(FT-IR)和X射线光电子能谱(XPS)分析表明,KH-550和丙烯酸树脂通过共聚反应在铝粉表面形成了保护膜。以此改性铝粉制备水性铝颜料,通过扫描电镜(SEM)和能谱仪(EDS)对其进行了表征,发现铝粉颜料呈片状,氧含量低(5.17%),具有较好的金属光泽。将此铝颜料用于水性无铬锌基涂料,所制备的涂料具有良好的金属光泽和耐腐蚀性。     

水性无机富铝涂料

论述了水溶性硅酸盐处理片状铝粉的技术和水性无机富铝涂料制备的方法.被处理的铝粉表面被反应物包覆,使单个铝粉粒子完全密封,从而使铝粉变得稳定.处理后的铝粉颜料,与成膜剂硅酸盐、固化剂、成膜助剂、改性添加剂等配制成贮存稳定、性能优异的水性硅酸盐无机富铝涂料(E02-4富铝).讨论了铝粉在硅酸钠中的反应机理和胶囊化模型.     

快讯

<正>多项颜料、涂料行业标准将于2016年1月1日起实施日前,工信部批准发布543项行业标准。其中,涉及颜料领域的行业标准有7项,包括工业硫酸钴、工业磷酸锌、工业碱式碳酸铜、碱式碳酸铅、工业碱式氯化铜、涂料用铝颜料(第3部分):聚合物包覆铝粉浆、涂料用铝颜料(第4部分):真空镀铝悬浮液。涉及涂料领域的行业标准有10项,包括家电用预涂卷材涂料、低锌底漆、冷涂锌涂料、水性无机磷酸盐耐溶剂防腐涂料、水性醇酸树脂涂料、喷涂橡胶沥青防水涂料、水性聚氨酯地坪涂料、硼酸锌阻燃剂、工业次磷酸铝、建筑涂料用弹性乳液。     

原位三元共聚制备高亮度水性铝颜料

为提高铝颜料在水性介质中的耐蚀性能,以丙烯酸(AA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸丁酯(BMA)为单体,过氧化二苯甲酰(BPO)为引发剂,丙二醇甲醚(PM)为溶剂,通过三元共聚反应在片状铝粉表面包覆致密薄膜,制备了高亮度水性铝颜料。结果表明,当m(丙烯酸)∶m(甲基丙烯酸甲酯)∶m(甲基丙烯酸丁酯)∶m(过氧化二苯甲酰)∶m(丙二醇甲醚)∶m(片状铝粉)=0.083∶0.083∶0.083∶0.015∶40∶1,85℃反应6 h时,水性铝颜料的缓蚀效率为97.2%,涂层光泽度为109.9 Gs。激光粒度分析、SEM和FTIR分析表明,AA、MMA和BMA三种单体通过原位三元共聚在片状铝粉表面形成了致密共聚物薄膜。     

水性涂料用铝粉颜料的研究进展

介绍了水性涂料用铝粉颜料的改性方法,包括添加剂法和包覆法,并介绍了对铝粉稳定性评价的方法。     

粉末涂料中易分散铝粉颜料的研究

针对铝粉颜料在粉末涂料中高添加量的情况下分散效果不佳、抗电压稳定性差、容易堵枪聚枪等缺点,对易分散铝粉颜料工业生产的关键技术进行了研究.通过对树脂种类、树脂包覆量及反应时间的选择性研究,确定了易分散铝粉颜料的生产工艺条件.以混合的活性树脂为包覆树脂,与致密硅包铝粉颜料的质量比为1∶1的情况下,反应4 h后,制得易分散铝...     

对提高铝粉浆质量问题的探讨

(一)前言铝粉颜料是以铝鳞片为主体的金属颜料,有粉和膏两种形态,后者又称铝粉浆或银浆。按其在漆基中的漂浮性能可分为浮性和非浮性两大类。铝鳞片具有较强的金属光泽、耐热性好,屏蔽性优良、耐水、耐蚀,所以多用铝粉颜料调制耐温抗蚀涂料。非浮性铝粉颜料除了上述性能外,又用于制造具     

汽车涂料

201207050含片状光干涉颜料的金属闪光涂料组合物及其成膜方法:JP2012-17364[日本专利公开]/日本:Kansai Paint Co.,Ltd.(Shimizu,Hiroshi等).-2012.01.26.-10页.-2010/154147(2010.07.06);IPC C09D201/00题述涂料组合物使其涂层的色彩饱和度高、外观丰满,而且具有颗粒感,适用于汽车外部涂装。该涂料含≥2种片状光干涉颜料,这些颜料由金属氧化物包覆半透明片状材料而制得,如:(a)金属氧化物包覆的铝粉颜料或金属氧化物包覆的云母颜料;(b)金属氧化物包覆的玻璃片状     

耐腐蚀水性铝颜料的制备及表征

为了提高铝颜料在水性涂料中的耐腐蚀性能,以正硅酸乙酯(TEOS)为前驱物,通过溶胶-凝胶反应在铝颜料表面形成了一层致密的二氧化硅包覆薄膜,通过优化固含量、溶剂种类及TEOS的用量,提高铝颜料的耐碱性。利用扫描电镜、刮板试验、接触角测试、析氢实验进行表征,结果表明:以无水乙醇为溶剂,铝金属颜料固含量为10%,升温至50℃后,逐滴加入6 g TEOS,再升温至80℃,该条件下制备的SiO₂膜包覆后的铝颜料具有优异的耐碱性,同时表面性能由疏水性转变成亲水性,对铝颜料起到了很好的保护作用。     

水性无铬锌铝防腐涂料的研制

以高模数硅酸盐代替传统铬酐黏结剂,实现无铬黏结,采用硅烷偶联剂对颜料铝粉表面进行包覆改性,以此改性铝粉制备水性锌铝涂层,同时添加一定浓度的磷钼酸钠缓蚀剂提高涂层防腐性能。研究了硅烷偶联剂种类和用量对包覆铝粉在水性体系中分散稳定性的影响,同时考察了缓蚀剂浓度对涂层耐腐蚀性能的影响。通过SEM、EDS、EIS等分析方法对颜料铝粉及涂膜性能进行了表征。结果表明:经5%的WD-60包覆改性后的颜料铝粉分散稳定性较好;添加1%的磷钼酸钠缓蚀剂所制备的锌铝涂层耐腐蚀性能明显提高。     

TEOS/MTES协同水解包覆铝颜料的研究

以正硅酸乙酯(TEOS)和甲基三乙氧基硅烷(MTES)为前驱物、氨水为催化剂,通过溶胶-凝胶反应在铝颜料表面形成了薄而致密的有机-无机包覆层.研究了影响成膜形态的反应因素以及包覆产物的耐酸性.结果发现,当TEOS、MTES、氨水和水的乙醇溶液同时滴入铝颜料溶液,并控制反应配比为铝颜料2 g、MTES 3 g、TEOS ...     

Aluminum pigments encapsulated by inorganic–organic hybrid coatings and their stability in alkaline aqueous media

Encapsulated aluminum pigments were prepared by sol–gel derived inorganic–organic hybrid coatings. Aluminum pigments were first coated with sol–gel film by using tetraethoxysilane (TEOS) and vinyltriethoxysilane (VTES) as the precursor, followed by free radical copolymerization of styrene (St), divinylbenzene (DVB) and maleic acid anhydride (MAA) with the vinyl group of the VTES. The as-prepared encapsulated aluminum pigment was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Subsequently the stability of the aluminum pigments in alkaline aqueous media was examined. It was found that both the TEOS-and-VTES-coated (TV-coated) and the TEOS–VTES–St–DVB–MAA-coated (TVSDM-coated) aluminum pigments were superior in the stability test over the uncoated aluminum pigments. Furthermore, the corrosion protection efficiency of the TVSDM-coated aluminum pigments reaches 99.8%, indicating that the inorganic–organic hybrid composite layer on the surface of the aluminum pigments can protect them well.     

Preparation of cationic pigment dispersions by surface grafting of polystyrene‐maleic anhydride with glycidyltriethylammonium chloride

Novel cationic pigment dispersions, which have potential uses in inkjet inks and coloration of textile and paper, were prepared by grafting quarternary ammonium groups onto the surface of polystyrene‐maleic anhydride encapsulated C. I. pigment yellow 14 (PY 14) powder. It is shown that the Zeta potentials greatly rely on the reaction time and temperature. And also, when the weight ratio of glycidyltriethylammonium chloride (GTA) to encapsulated PY 14 powder was 3 : 1, the Zeta potential of modified pigment dispersion reached to + 35.05 mV. Just due to the high Zeta potential of the prepared cationic pigment dispersions, the prepared cationic pigment dispersion shows good dispersion stability and a narrow size distribution with the average particle size of 202.9 nm. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Encapsulated carbon black prepared by sol–gel-spraying: A new black ceramic pigment

As a new black ceramic pigment, encapsulated carbon black pigment has been prepared by a sol–gel-spraying method. The obtained pigment sintered at 900 °C for 2 h in air has a deep black hue (L* = 19), indicating carbon black can be fully covered. In the pigment, a dense coating layer on carbon black is formed due to the fast transformation from sol into gel by rapid extraction of solvent. The transparent silica phase spaces out the fine crystalline (zirconia or zircon), which permits to display the color of carbon black. This preparation method provides a way to prepare the encapsulated pigments. It will provide more colorful ceramic pigment applied in ceramic decoration by encapsulating.     

乳液聚合法包覆酞菁蓝的制备及性能研究

在超细可聚合分散剂/酞菁蓝分散体中添加共聚单体和引发剂,采用乳液聚合法对酞菁蓝进行包覆。考察了共聚单体结构及用量、引发剂用量、反应温度和时间对包覆酞菁蓝性能的影响。结果表明,与甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)相比,苯乙烯(St)是较佳的包覆共聚单体,当St质量为颜料质量的20%,过硫酸铵(APS)质量为St与烯丙氧基壬基苯氧基丙醇聚氧乙烯磺酸铵(ANPS)总质量的1.0%,于70～80℃反应2 h时,所制备包覆酞菁蓝的粒径较小,稳定性较高。与未聚合分散体相比,包覆酞菁蓝的耐热稳定性、耐酸碱稳定性和离心稳定性均有明显提高,FTIR和TEM照片表明,酞菁蓝表面包覆了聚合物,且包覆酞菁蓝粒度分布更均匀。     

Preparation of high near-infrared reflectance mica/(Ni,Sb)-co-doped rutile yellow composite pigment via mechanochemical pretreatment and sintering

Mica/(Ni, Sb)-co-doped rutile yellow composite pigment with a high near-infrared reflectance was prepared via mechanochemical pretreatment and subsequent sintering. (Ni, Sb)-co-doped rutile yellow pigment was synthesized by a solid-phase method in the presence of sodium fluoride (NaF) as a mineralizer, and mica was peeled by ultrafine grinding. The pigment, mica and mica/pigment composite were characterized by X-ray diffraction, laser diffraction particle size analysis, nitrogen gas adsorption method, scanning electron microscopy, energy dispersive spectroscopy, ultraviolet–visible–near-infrared spectroscopy, CIEL*a*b* color scales, and infrared irradiation image, respectively. The results show that the temperature of synthesizing a pure rutile pigment in solid-phase reaction is reduced by 100°C due to the addition of mineralizer NaF. (Ni, Sb)-co-doped rutile pigment has better color rendering performance and near-infrared (NIR) reflectance. Ultrafine grinding produces the finer flatty mica particles with fresh reflective surfaces, thus improving NIR reflectance of peeled mica. In mica/pigment composite prepared via mechanochemical pretreatment and subsequent sintering, peeled mica has a synergistic effect on (Ni, Sb)-co-doped rutile pigment particles to further scatter near-infrared radiation through the multiple layer reflections, leading to a better heat insulation. The high near-infrared reflectance of composite pigment increases to 97.72%, and the b* value of the pigment synthesized with 1 wt% NaF is 37.77. For the irradiation infrared lamp, the surface temperature of aluminum plate coated with mica/(Ni, Sb)-co-doped rutile yellow composite pigment is 40.1 ± 0.2°C, which is lower than that of aluminum plate uncoated determined by thermal camera and thermocouple. When aluminum plate coated with mica/(Ni, Sb)-co-doped rutile yellow composite pigment is under sunshine, its surface temperature is 38.6 ± 0.2°C. In addition, the mechanism of preparing the composite pigment via mechanochemical pretreatment and subsequent sintering and the multiple structure reflection effect on peeled mica surface coated with (Ni, Sb)-co-doped rutile yellow pigment particles were also discussed.     

Preparation of styrene‐maleic acid copolymers and its application in encapsulated pigment red 122 dispersion

Styrene‐maleic acid copolymers were synthesized by free radical polymerization. Encapsulated pigment red 122 dispersions were prepared by sedimentation with these copolymers. Effects of copolymer structure such as molar content of maleic acid, molecular weight, and the amount of copolymers on stability and particle size of dispersion were investigated. The results showed that encapsulated pigment dispersion with higher stability, smaller particle size, and narrower particle distribution could be achieved when the molar content of maleic acid was at 0.43 and the intrinsic viscosity was at 79.65 ml/g with amount of copolymers 10%. The encapsulated layer was about 5 nm which could be observed by TEM. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Preparation of melamine‐formaldehyde encapsulated fluorescent dye dispersion and its application to cotton fabric printing

In this study, CI Solvent Yellow 43 was encapsulated by melamine‐formaldehyde (MF) resin via in situ polymerisation to prepare the core‐shell structured fluorescent pigment. Fourier Transform‐infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetry were used to characterise the encapsulated CI Solvent Yellow 43, indicating that MF successfully encapsulated CI Solvent Yellow 43 and that a core‐shell structure was formed. The prepared MF encapsulated fluorescent dye dispersion was also applied to flat screen printing of cotton fabrics, and the colour properties and fastness properties (washing and rubbing fastness) of printed fabrics were studied. The results showed that the encapsulated CI Solvent Yellow 43 printed cotton fabric exhibited a higher chroma and fluorescence intensity than that printed with unencapsulated CI Solvent Yellow 43. Moreover, the washing and rubbing fastness of the encapsulated CI Solvent Yellow 43 printed fabric was improved.     

Properties of copper phthalocyanine blue encapsulated with a copolymer of styrene and maleic acid

Copper phthalocyanine blue was encapsulated with a copolymer of styrene and maleic acid (PSMA) via a phase‐separation technique, and a PSMA‐encapsulated pigment dispersion was prepared. The effects of the additive on the stability of the dispersion were studied. Scanning electron microscopy photographs revealed that the particles in the PSMA‐encapsulated pigment dispersion were more uniform than those in a PSMA‐dispersed pigment dispersion. X‐ray photoelectron spectroscopy provided evidence that the PSMA‐encapsulated pigment acquired abundant carboxylic groups that could improve its wettability to water. Moreover, the results also indicated that the PSMA‐encapsulated pigment dispersion had improved color strength, its stability could be greatly influenced by the pH value and ion strength, and its apparent viscosity changed little with an increase in the shear rate. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Directed inorganic modification of bi-component polymer fibers by selective vapor reaction and atomic layer deposition

Nanocomposite organic/inorganic materials with spatially-controlled composition can be formed using vapor-phase atomic layer deposition (ALD) on bi-component polymer fibers. The ALD process promotes selective precursor infusion into the inner core of a core/shell polymer fiber, yielding nanoparticles encapsulated within the core. Likewise, choosing alternate precursors or reaction conditions yield particles or films on the outer polymer shell. In-situ infrared spectroscopy and transmission electron microscopy show that infusion yields selective dispersion of aluminum oxide in different polymer regions, forming fine nanoparticle dispersions or films. Selective inclusion of metal oxide materials during atomic layer deposition on polymers can create unique organic/inorganic composite structures for many advanced uses.