研究与述评

通过化学氧化聚合法合成了掺杂了磷酸盐和硝酸盐的聚吡咯传吕粉复合颜料。一种涂料配方中含有掺杂了磷酸盐的聚吡咯腾吕粉复合颜料、掺杂了硝酸盐的聚吡咯／铝粉复合颜料,其中铝粉的颜料体积溶度为20％。     

没有金属的金属效果颜料——介绍一种珠光颜料

<正> 在装饰工作中每当需要获得金属的颜色或效果时,人们就会想到铝粉和金粉颜料。然而使用金属粉颜料,可能造成许多问题。一些问题同金属的物理和化学性质有关,另一些问题是在加工这些颜料时的困难所引起的。铝粉颜料能与水发生反应,并在某些条件下引起着火或爆炸。细的铝粉还会造成粉尘爆炸。由于这些危险,铝粉颜料通常都做成浆状出售(65～70％颜料份)。这样就使这些颜料在某些方面的应用多少受到了一些限     

金属颜料制漆后的胀听效应

铝粉颜料和其它金属颜料易与水起化学反应而产生氢气,使油漆在贮存过程中发生胀听效应。据国外最近报道,采用气体吸收剂或严格控制油漆生产工艺,精确控制铝粉浆的含水量,是能够解决胀听问题的。气体吸收剂的加入量,视颜料中的含水量而定:颜料水份含量高,则加入量大,但也不宜加入过多,否则对漆膜光泽会有所影响。在一般情况下,加入量为油漆的1％,或为铝粉颜料的3％,金粉颜料的1.5％,铝粉沥青和有机富锌颜料的6％。美国一化学公司曾用气体吸收剂作了试验,效果较好。将无反应性的铝粉(无水     

闪光铝粉颜料的制备和表面改性研究进展

概述了目前闪光铝粉颜料的制备和表面改性方法，评述了各种方法的优缺点，对今后闪光铝粉颜料的研制工作进行了展望。     

包覆型铝粉颜料在水性涂料中的应用

以正硅酸乙酯(TEOS)和乙烯基三乙氧基硅烷(VTES)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包覆层,再通过甲基丙烯酸甲酯(MMA)和丙烯酸(AA)的自由基聚合反应对铝颜料进行第二层包覆,制备了含亲水基团的包覆型铝粉颜料,以此包覆的铝颜料配制了水性铝粉涂料.研究了铝粉及交联剂的用量、涂料黏度和烘烤温度...     

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     

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。     

从铝粉优选角度谈免喷涂外观缺陷改善

金属光泽免喷涂塑料产品由于其独特的优势而具有广阔的应用前景,其中铝颜料是目前用量最大且最具有代表性的免喷涂颜料。但由于金属与高分子树脂基体天然的差异性以及铝粉不同的形貌特征等等,添加铝粉的金属光泽免喷涂制件往往会出现熔接痕、流痕等外观缺陷,应该如何更适宜的选择铝粉是一个行业难题。本文从铝粉形态的选择,铝粉粒径的选择以及铝粉径厚比的选择三个维度,探讨了铝粉的优选及其对免喷涂塑料产品外观缺陷改善的情况。     

铝粉颜料及其应用

<正> 通过在涂料和油墨行业的使用,发现铝粉浆有一个广阔而又多样的美学价值,随着铝粉浆技术的不断发展。九十年代在这些领域的应用前景确实令人兴奋。过去对铝粉颜料的介绍,已经说明它的物理性能,在介绍铝粉颜料的物理性质的同时,其在汽车工业、通用机械及油墨行业已受到重视。对包括颜料等级、树脂、溶剂和添加剂在内的涂料设计师典型使用的配方工     

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。     

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。     

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 ...     

Preparation of encapsulated aluminum pigments by emulsion polymerization and their characterization

An emulsion polymerization-like process for the encapsulation of commercial aluminum pigments with polymer is discussed. A possible application target is the improvement of the performance of aluminum pigment in waterborne coatings. The effect of the treatment on the stability of the aluminum pigments in the presence of alkaline water was examined. Analytical investigations with SEM, TEM, STEM-EDX, XPS, and TOC were performed and revealed a kind of coagulation mechanism of polymer particles on the pigment surface. D-63784 Obernburg, Germany.     

Electrochemical investigations into polypyrrole/aluminum flake pigmented coatings

In this study polypyrrole was synthesized in the presence of aluminum flake to produce polypyrrole/aluminum flake hybrids. The resulting flakes were incorporated into a standard epoxy coating at relatively high pigment volume concentrations with the end goal of producing a conducting film capable of providing corrosion inhibition to an aluminum alloy. To further investigate the coatings, electrochemical impedance spectroscopy (EIS) was used to characterize the effects of the pigment volume concentration (PVC) on the impedances of the coatings. Additionally, the nature of the polypyrrole, chemical composition, and surface morphology of the hybrid were characterized by a density test and scanning electron microscopy (SEM).     

Stabilization of aluminum pigment in waterborne paints

The corrosion of aluminum pigments in aqueous alkaline paint media, which results in the evolution of hydrgen, can be inhibited by certain substances. The combination of noninhibiting paint resins with three corrosion inhibitors (salicylic acid, a fluorinated phosphate surfactant, and an epoxy ester resin) has been studied. The presence of the resins does not significantly affect the stabilization of the aluminum pigment at pH 10 by the corrosion inhibitors. With the addition of corrosion inhibitors, the hydrogen volume evolved from aqueous aluminum pigment dispersions is surprisingly reduced by stirring. However, when heated to +40°C aqueous aluminum pigment dispersions with inhibitors evolve more hydrogen; at pH 8 the results are still satisfactory even at +40°C.     

苯丙乳液水性防锈涂料的配方研究

以自制苯丙乳液为基料,通过加入多种防锈颜填料和助剂,制备出一种水性防锈涂料.研究了涂料中颜料体积浓度（PVC）、防锈颜料种类及用量、防锈颜填料之比、铁红和三聚磷酸铝质量之比、润湿分散剂用量、消泡剂对涂层性能的影响.试验结果表明,颜料体积浓度PVC=25％,颜填料比为1.6∶1,氧化铁红和三聚磷酸铝比为1∶1,润湿分散剂用量为涂料总量的0.7％,消泡剂A与B按质量比1∶1时,水性防锈涂料的综合性能最好.     

Corrosion inhibition of aluminum by organic coatings formulated with calcium exchange silica pigment

One of the first commercial ion-exchange anticorrosive pigments to be developed was Shieldex^® (Si/Ca). Its proposed corrosion protection mechanism, based on the retention of aggressive cations and the subsequent release of calcium cations, has created certain controversy. A number of studies have focused on the anticorrosive behavior of this pigment on carbon steel and galvanized steel to replace chromates (Cr⁶⁺) as inhibitor pigment, but none has considered its performance on aluminum or aluminum alloys. In this research, alkyd coatings have been formulated with Si/Ca pigment at different concentrations and applied on aluminum 1050 (Al 99.5%) specimens. These specimens have then been subjected to accelerated tests (condensing humidity, salt spray, and Kesternich) and natural weathering in atmospheres of different aggressivity. Corrosion performance has been also evaluated in the laboratory by electrochemical impedance spectroscopy. The study has also considered an organic coating with zinc chromate anticorrosive pigment for comparative purposes. The results obtained with organic coatings formulated with Si/Ca pigments confirm that they provide corrosion protection of the underlying aluminum substrate, even improving the behavior of the reference zinc chromate in some environmental conditions.     

发动机排气管用新型耐高温防腐蚀涂料体系

介绍了一种发动机排气管用新型耐高温防腐蚀涂料体系。该涂料体系底漆由铝粉、无机磷酸盐、水及其它颜填料制备而成,面漆为硅酸盐涂料。主要讨论了底漆中铝粉含量及不同粒径铝粉之间的比例对涂层性能的影响和不同底材处理方式及固化工艺对于涂层性能的影响。