酞菁蓝-活性炭复合云母钛珠光颜料的制备

将酞菁蓝和活性炭包覆在云母钛珠光颜料上，制得蓝色至蓝黑色的珠光颜料。介绍了该珠光颜料的制法。讨论了酞菁蓝和活性炭的包覆机理，以及所用的表面活性剂和最佳包覆的工艺条件。     

黄色云母珠光颜料的制备

将纳米BiVO4包覆在云母钛珠光颜料上,制得了黄色珠光颜料。介绍了该珠光颜料的制备方法,并探讨了BiVO4的包覆机理。     

液相沉积法制备金云母钛珠光颜料

以耐高温性能优于绢云母的金云母为基材,TiCl4为沉淀剂,SnCl4为晶型促进剂,通过液相沉积法成功制备金云母钛珠光颜料。通过X射线衍射(XRD)和扫描电子显微镜(SEM)分析对金云母钛珠光颜料的结构进行表征,重点探讨了该种液相沉积法对金云母钛珠光颜料的制备效果。结果表明TiO2纳米粒子均匀地包覆于金云母表面,且TiO2纳米粒子粒径均匀,分散性好。     

幻彩型人工氟金云母钛珠光颜料制备工艺的研究

利用液相沉积法对不同粒径的氟金云母钛珠光颜料制备工艺进行了研究。探讨了反应温度、TiCl4浓度、TiCl4加料速度对幻彩系列颜料珠光效果的影响以及TiCl4用量与颜料幻彩颜色的对应关系。采用扫描电子显微镜(SEM)观察云母钛珠光颜料的表面TiO2膜形貌。研究结果表明:在反应温度为78℃、TiCl4浓度为1.5～2.0 mol/L时得到珠光颜料光泽好,其表面包覆的TiO2膜平整、连续、致密、粒径在40 nm左右。氟金云母的平均粒径越小,TiCl4的最佳加料速度越快。制备同一色彩珠光颜料时,不同粒径的氟金云母所需包覆的TiO2量以单位比表面积计基本相同,所以在颜料色彩相同情况下,只要测得氟金云母的比表面积,即可推算出不同粒径云母所需包覆的TiO2量。     

新型珠光颜料

新型珠光颜料通常珠光颜料是用二氧化钛包覆云母薄片制成的。云母薄片的厚度不同，二氧化钛包膜产生的光散射对云母本身的珠光色彩有不良影响。日本专利公开，昭６１－１２３６７３报道的新型珠光颜料，是将二氧化钛改为硫酸钡等透明体质颜料包覆在云母薄片上，这样可透出...     

工业硫酸氧钛制备珠光颜料实验研究

以攀枝花某钛白粉厂工业硫酸氧钛浓钛液为原料,经过冷冻除铁处理,用于制备银白色云母钛珠光颜料。考察了原料预处理、溶液pH、沉积量、沉积时间、热处理等因素对珠光颜料珠光效果的影响,找到了制备银白色云母钛珠光颜料的适宜工艺参数。采用热重分析、X射线衍射(XRD)、扫描电镜(SEM)等对云母钛珠光颜料进行了表征。结果表明,利用工业硫酸氧钛浓钛液可以在云母片上沉积一层偏钛酸,经过750～850℃热处理在云母片上包覆了一层纳米级二氧化钛薄膜,X射线衍射分析表明该层包膜是锐钛型纳米二氧化钛,扫描电镜分析表明纳米级二氧化钛粒径约为30 nm。     

双覆层包膜法制备彩色云母珠光颜料

通过双覆层包膜法在自制云母钛表面包覆一层其它金属氧化物,而制备出彩色云母珠光颜料.钴着黑色珠光颜料的最适宜工艺条件为:水解温度100℃,pH值7～8,对应于10 g云母钛的硝酸钴加入量为25～30 mL,水解反应时间为2.0 h,煅烧条件是在600℃下保温1.5 h.镍着灰绿色珠光颜料的最适宜工艺条件为:水解温度90 ...     

云母钛珠光颜料表面改性研究现状

综述了近年来国内外云母钛珠光颜料在表面改性方面的研究进展，阐述了改善云母钛珠光颜料遮盖性能、稳定性、分散性等性能的方法和原理，得出了对珠光颜料进行表面改性将是未来珠光颜料研究的一个重要方向的结论。     

我国云母钛珠光颜料质量差距及改进措施

通过国产和国外云母钛珠光颜料产品的质量分析和比较，阐述了国产云母钛珠光颜料与国外同类产品在光泽、颜色、湿润性和分散性４个方面的差距。从云母薄片的制造、分级、包膜技术和颜料表面处理等方面，探讨改进国产珠光颜料质量的措施。     

云母钛珠光颜料的包膜及其在涂料中的使用性能

探讨了云母钛珠光颜料的包膜机理，研究了云母钛珠光颜料在涂料中的分散性以及颜料粒径和含量对涂料光学性能和各种机械性能的影响。     

国外云母系珠光颜料研究的新进展

综述了近期国外云母系珠光颜料开发研究的最新进展，分析了多覆层云母珠光颜料能提高遮盖力的原因，阐述了具有高着色能力的有机着色类云母珠光颜料合成研究的现状     

New effect pigments from grey to black

This paper shows different possibilities of manufacturing silver-grey mica pigments. One example, the mica-ilmenite pigments Iriodin® 9602 WR II and Iriodin® 9612 WR II, are discussed in detail concerning the production process and their chemical and physical characteristics. The colorimetric data of the new mica pigments are discussed and the first weathering data presented. The results show that these pigments give the color chemist a new styling tool for the grey and silver-grey color range. Through the addition of transparent organic pigments brillant and deep metallic-like colors can be achieved. A second type of mica pigment, black magnetite on mica, is presented in its basic chemical structure and its potential use for the color chemist.     

丙烯酸聚氨酯涂料的研制

采用多羟基丙烯酸树脂作为羟基组分,ＨＤＩ缩二脲多异氰酸酯作为固化剂,配制成丙烯酸聚氨酯摩托车涂料。该涂料既保持了丙烯酸涂料优异的硬度、丰满度、光泽、耐候性和耐化学品性,又具有良好的附着力、柔韧性和耐磨性。介绍了该涂料的配方及其配制。比较了几种摩托车涂料的性能。讨论了涂料用原料的选择     

明快色调的导电云母颜料

以德国默克公司的导电云母颜料产品为例,介绍了导电云母颜料的结构与性能,以及在导电涂料中的应用     

着色型云母系珠光颜料的制备工艺进展

本文综述了近年来国内外着色型云母钛珠光颜料的制备工艺进展情况。介绍了无机化合物、有机化合物及无机 -有机化合物复合包膜方法 ;膜层结构由单覆层、双覆层及多覆层组成的云母钛珠光颜料的主要性能 ,并对其进行了分析对比 ,指出无机系列、无机 -有机复合着色系列、金属离子共沉淀法制备的着色珠光颜料 ,将是今后的研究与开发方向     

Mica/polypyrrole (doped) composite containing coatings for the corrosion protection of cold rolled steel

Micas/polypyrroles (PPys) doped with molybdate, p-toluene sulfonate, dodecyl benzene sulfonate, and 2-naphthalene sulfonate composite pigments were synthesized by chemical oxidative polymerization and characterized in coatings for corrosion protection on cold rolled steel substrate by various electrochemical techniques. Synthesized composite pigments were characterized for morphology by scanning electron microscopy, which indicated physical formation of PPy on the surface of mica. Chemical composition of the composite pigments was analyzed by X-ray photoelectron spectroscopy which chemically confirmed doped PPy formation on the mica surface. Coatings were formulated at 20% pigment volume concentration (composite pigments or as-received mica pigment) and were applied on cold rolled steel substrate. Coatings were exposed to salt spray test conditions (ASTM B117) for 30 days and were periodically assessed for corrosion with electrochemical impedance spectroscopy (EIS), open circuit potential (OCP), and potentiodynamic polarization. EIS and circuit modeling results demonstrated higher coating resistance (R _c) for mica/PPy (doped) composite coatings as compared to as-received mica pigment containing coating after 30 days of salt spray exposure. Lower current density and more positive corrosion potential values were observed for mica/PPy (doped) composite coatings as compared to mica pigment-based coating in potentiodynamic polarization measurements, indicating improved corrosion protection for cold rolled steel substrate. OCP measurements revealed more positive values for mica/PPy (doped) composite coatings as compared to mica pigment-based coating suggesting superior corrosion protection for mica/PPy (doped) composites.     

Influence of the seed layer on photoactivity inhibition of mica–titania pigments

The influence of the seed layer on the phase composition and photoactivity inhibition of mica–titania pigments was investigated. The prior deposition of MnO₂ or SnO₂ as a seed layer resulted in a complete rutile TiO₂ coating without calcinations, while the prior deposition of ZnO led to a mixture of anatase and rutile. The rutile promoting effect of MnO₂ and SnO₂ could be ascribed to the small lattice mismatch (＜5%) between the seed layer and the rutile TiO₂. Moreover, the seed layer had a great influence on the photoactivity inhibition of mica–titania pigments. A seed layer of MnO₂ inhibited the photoactivity of the pigments, whereas a seed layer of SnO₂ or ZnO enhanced the photoactivity of the pigments. The degradation rate constant of mica–MnO₂–TiO₂ was approximately 72.7% that of mica–TiO₂, while the degradation rate constant of mica–SnO₂–TiO₂ was approximately 4.5 times as high as that of mica–TiO₂. The influence of the seed layer on the photoactivity of mica–titania pigments depended on the transfer process of electron–hole pairs between the seed layer and TiO₂.     

Mica pigments in solvent free coatings systems

Mica pigments are nowadays extensively used in different solvent containing paint systems, e.g. in automotive paints. Although water-borne coatings are gaining more and more importance, the need for even more environmentally safe to use coatings calls for coatings with less or even no solvents. To achieve this goal—no solvents—basically two technologies are used: one is powder coating, the other is radiation curing like UV- and electron beam-curable systems. Together with the need for more environmentally safe paint systems the consumer also requests highly esthetic coatings, especially concerning colour and effect. This paper describes how mica pigments, which are themselves environmentally safe and are used for high esthetic requirements, work in solvent free paint systems like powder coating and radiation-curable systems. Special attention is given to how mica pigments can be incorporated into powder coatings and what measures have to be taken to achieve an optimised effect. Concerning radiation, especially UV-curable systems, the advantages of mica pigments compared to other effect pigments are discussed.     

锂云母珠光颜料在陶瓷釉料中的性能研究

通过白度和反射率对珠光颜料在陶瓷釉料中的着色力和珠光光泽进行了表征,探讨了PH值、水浴温度、锂云母:TiO2比例和煅烧温度对所制备的珠光颜料在制品白度和反射率的影响。XRD分析结果表明:当随着锂云母:TiO2比例增加(包覆次数的增加)时,白云母晶相和金红石相发生了较大变化,从而影响着釉面的白度和反射率。结果表明当锂云母:TiO2为100:62时,通过EDS测定并计算出TiO2的包覆率约达到22.12%。其釉面效果达到最优:白度为82%,反射率为45.7%     

Structural analysis and characterization of doped spinel Co2−xMxTiO4 (M=Mg2+, Mn2+, Ni2+, Cu2+ and Zn2+) coated mica composite pigments

A new kind of composite mica pigments were prepared by coating Co_2−xM_xTiO₄ composite oxide nanoparticles onto mica, to investigate the effects of doping ions Mg²⁺, Mn²⁺, Ni²⁺, Cu²⁺ and Zn²⁺ on the properties of the doped composite pearlescent pigments, such as the crystal structure, color and shading power. The structure, morphology, color and shading power of the coated pigments were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis spectrophotometer and CIE L*a*b* methods. SEM images of coated pigments showed that mica were coated uniformly with a single layer of dispersed nanoparticles. Research of the doped composite pigments showed that the doping ions had entered into the spinel crystal structure, forming a new kind of composite mica pearlescent pigments coated with Co_2−xM_xTiO₄. For the analysis of color and shading power of the pigments, doping of Ni²⁺ and Zn²⁺ can improve the color and shading power of the doped pigments, but the larger dosage of Zn²⁺ doping can weaken the color and shading power of the doped pigments. Doping of Mg²⁺, Mn²⁺ and Cu²⁺ metal ions can also weaken the color and shading power of the doped pigments.