稀土黄色颜料的制备

稀土陶瓷颜料的研究已有二十余年的历史,而较大量地应用于工业生产是本世纪七十年代初开始的。其中稀土黄色颜料(镨黄)研究得最多,最成熟。许多国家连续发表了有关专利。对     

江西省一级科研项目《稀土陶瓷颜料的研究》通过鉴定

江西省科委一级重点科研项目《稀土陶瓷颜料的研究》成果于四月二日在景德镇陶瓷学院通过鉴定,并曾在1989年全国轻工业推动企业技术进步活动周中获新产品奖。该项目较系统地研究了稀土在锆英石中的呈色机理。研制的锆英石型黄、红、兰、绿、灰五种色调的稀土陶瓷颜料,其中黄色和红色颜料,色相纯正,接近或达到国外同类颜料水平;灰色颜料与国外相似;兰、绿色颜料属稀土锆英石型颜料国内外新品种,呈色稳定。该系列颜料经武汉工业大学测试中心,国家日用陶瓷检测中心检测,技术指标达到中华人民共     

颜料、颜料制剂及填料

一种涂料印花用自粘性有机颜料微胶囊的制备方法：CN101 531 830;环境友好型无毒带红相黄色颜料用掺杂稀土氧化物的合成与表征;无酚醛类分散剂的水性浓加工颜料：DE 102 007 021 867     

几种黄色陶瓷颜料介绍

介绍了陶瓷颜料的发色机理及几种常见的黄色陶瓷用颜料,并指出黄色颜料的发展趋势,为研制开发新的黄色陶瓷颜料提出了参考和积极的建议。     

联苯胺黄系颜料的改进品种

联苯胺黄系颜料是重要的黄色有机颜料。这类颜料(C.I.颜料黄12、13和14)虽早在1911年已有专利提出,但直到三十年代末四十年代初期才有商品投入市场。联苯胺黄系颜料也是产量最大的一类黄色颜料,其产量占世界有机颜料总产量的20％左右。在美国联苯胺黄系颜料占所有黄色有机颜料的80％,其主要品种有C.I.颜料黄12、13、14、17和83等。联苯胺黄系颜料虽然是一类重要的颜料,但由于它的耐热性、耐气候性和耐溶剂性较差,因而限制了它在某些领域中的应用。     

无铅颜料──安全黄的性能与应用

一、前言含铅的黄色颜料由于有毒而日益受到新的环保法的限制，在美国，新的环保法规定：到一九九五年将不准在黄色交通漆中使用有毒的中铬黄，类似的法规已在加拿大和北欧通过。面对中铬黄限制使用而造成的市场空缺，目前颜料制造厂家都在研究新的换代产品，主要是用有机黄色颜料取代中铬黄，但此类颜料售价一般在中铬黄的十倍以上，从而使黄色交通漆的成本提高到用户不能接受的程度，市场迫切需要一种价格适宜的无毒黄色颜林为此广州华立颜料化工实业公司与美国一家公司经数年合作研制开发成功了无铅黄色颜料——安全黄。安全黄样品1991年…     

新颜料、新助剂等

新颜料、新助剂英国Elementis颜料公司推出了一系列高级颜料,它们包括用于含溶剂和水性体系的易分散黄色和红色颜料产品.主要产品是黄色系列的"YEO1988D"和"YID2288D",以及红色系列的"RO2097/3097/4097/4597".     

谈谈铁系颜料的发展

氧化铁系颜料在无机彩色颜料中占有重要地位，其产量首屈一指，早在远古时代就开始使用氧化铁系颜料，至今仍不败落，究其原因是它具有优异的颜料性能，从低档天然矿物质颜料到高档合成的磁性颜料，品种多而用途广，价格低而无毒，所以得到大量的使用。1、氧化铁系颜料颜色丰富众所周知，氧化铁系颜料是以氧化铁红为主的系列颜料，色错很宽，可分黄、红、棕、黑四大类。细分则黄色按色相可由浅柠檬黄色到桔黄色，即由偏绿相的黄色到偏红相的黄色，其中间有无数个品种，可根据需要而定；红色可由桔红包到红紫色，即由偏黄相的红色到偏兰根的…     

含铅颜料代用品的开发进展

含铅颜料是主要的铅污染源。介绍了国外含铅颜料代用品的开发情况,它们是新型无毒防锈颜料、正确调整的有机颜料、金红石型混相颜料、钒酸铋黄、稀土颜料和安全黄。     

利用余热烧制稀土无机颜料

为了降低无机稀土颜料的使用成本,利用低温快烧墙地砖生产线油烧辊道窑余热进行颜料合成;以合成镨锆黄颜料为例,利用通用色差仪对最后所得产品进行色调测定。结果表明:矿化剂、烧成温度和烧成气氛对颜料的合成非常敏感,而原材料粒度、配比和合成保温时间相对影响较小;通过调整复合矿化剂,富含硅量的配方可在辊道窑冷却带预留孔700℃预烧,950℃恒温烧结2 h,合成了锆英石系稀土无机颜料。     

用晶包含色料制备系列红色釉

采用锆英石晶包色料，研制系列红色釉，通过与其它色料如晶包黄、镨黄、锆铁红的调配可制得从大红到橙色一系列高档色釉。     

Reaction of thiobarbituric acid with saturated aldehydes

The reaction of thiobarbituric acid (TBA) with saturated aldehydes, i.e., 1-butanal, 1-hexanal and 1-heptanal, produced a 455-nm yellow and a 532-nm red pigment. Formation of the pigments depended on the reaction conditions. The yellow pigment was unstable in the presence of excess amounts of the saturated aldehydes. The red pigment was formed only when the reaction was performed at a TBA/aldehyde ratio of 1∶1 in aqueous acetic acid. Formation of the yellow and red pigments required molecular oxygen. The colorless adducts, intermediates for the yellow and the red pigments, were isolated from the reaction mixtures. Aldol condensation and dehydration of 2 mol of the saturated aldehydes initially gave the α,β-unsaturated aldehydes, which in turn reacted with TBA to form the colorless adducts, pyranopyrimidine derivatives. The adducts were then converted into the yellow and red pigments under aerobic conditions.     

Synthesis and coloration of highly dispersed NiTiO3@TiO2 yellow pigments with core-shell structure

The highly dispersed NiTiO₃@TiO₂ yellow pigments with core-shell structure were prepared through calcinations of precursors obtained from the precipitation of Ni²⁺ on the surface of TiO₂ particles. The synthesized pigments were characterized by XRD, SEM, TEM, Uv–vis spectroscopy and colorimetry. The pigments were found to consist of TiO₂ core and outer ilmenite NiTiO₃ shell. The optical absorption of Ni²⁺ in octahedral coordination produced intense yellow colors. Compared with pure NiTiO₃, the NiTiO₃@TiO₂ pigments presented higher yellow and lower red hues, resulted in intense yellow colors. The particle size distribution of the prepared pigments and ζ potential measurement indicated that the NiTiO₃-0.75@TiO₂ pigments were uniform and well-dispersed in glycol solvents, and they form relatively more stable suspension than pure NiTiO₃ pigments. Meanwhile, these pigments were stable in commercial low–temperature ceramic glazes, possessed more brilliant yellowish colors than pure NiTiO₃ prepared by sol-gel method.     

透明氧化铁黄颜料的制备和表面改性

介绍了透明氧化铁黄颜料的性质、用途、制备方法以及改性处理。通过在反应过程中和/或反应结束后加入各种助剂处理,可得到透明度高、分散性好、色相纯、耐热性能优良的透明铁黄。     

铅铬黄颜料使用及安全性能

简单介绍了铅铬黄颜料的使用性能,并从其毒性、在塑料制品和涂料中应用的安全性问题进行了阐述。综合表明,根据应用环境进行正确选择,注意安全生产、采取安全防护措施,应该说铅铬黄颜料是相对安全的。     

水性涂料用着色剂的选择

本文对在水性涂料中的各类着色剂进行了归类;综述了各类着色剂在水性涂料中的应用,包括染料、无机颜料、有机颜料、效应颜料、特种颜料和颜料预制剂;详细地分析对比了常用有机和无机颜料的性能和应用的领域。另外,文章以劳尔色1021油菜黄为例,列举了不同涂料体系中对应的配色方案。     

Cool and photocatalytic yellow ceramic pigments; from lead-tin to Cr doped scheelite pigments

The historical lead based pigments (XVII-XVIII century), the modern Ni,Sb-rutile (1939) and Pr-zircon (1961) yellow pigments as well as the novel yellow pigments based on Cr-scheelite and Mo-yttrium cerate pigments were synthesized and compared as semiconductors of high NIR reflectance (cool pigments) and with photocatalytic activity. All powders are wide band gap semiconductors (E_g=2.1–3.1?eV) with high NIR reflectance, ranging from 80% for Cr-Scheelite to 86% of Naples yellow, except Ni,Sb-rutile pigment that shows 55%. The low color performance of lead based pigments in alkyd paint and lead-free glazes along with its toxicity, discard these pigments as cool eco-friendly pigments. The Pr-zircon, Cr-scheelite and Mo-yttrium cerate pigments exhibit high NIR reflectance (R_NIR =?80–83%) and yellow coloration (b*?=?57.6–45.3) but only Pr-zircon and Cr-scheelite show color stability in alkyd paint and lead free glaze applications. Regarding to results of Orange II photodegradation test, lead based and Ni,Sb-rutile pigments inhibits the photolysis of the UV irradiation, acting as protecting agents from irradiation. The Mo-cerate shows a slight photocatalytic activity (t_1/2 =?301?min) and both Cr-scheelite and Pr-zircon pigments show a moderate activity (t_1/2 =?198 and 184?min respectively). Looking at a possible industrial application, the leaching test shows that the fluorides released by Pr-zircon (16.8?mg/g) as well as the Cr(VI) of Cr-scheelite (6?mg/g) should be treated and controlled. The Cr-scheelite solid solution Ca(Cr_xW_1-x)O₄ is stable to x?=?0.2 but its pigmenting capacity saturates at x?=?0.1.     

具有屏蔽蓝光性能的PVA基功能薄膜的制备及性能研究

依据颜色互补原理,以聚乙烯醇(PVA)为基材,黄颜料为蓝光吸收剂,制备具有屏蔽蓝光特性的PVA基功能薄膜.通过调控黄颜料的种类和含量,研究了不同种类的黄颜料对蓝光屏蔽性能和薄膜透光率的影响.研究发现,耐晒黄的蓝光屏蔽性能最佳,且当其含量为0.5％时,蓝光屏蔽性能达到饱和状态.     

利用PDZ合成锆英石基陶瓷颜料

利用PDZ原料成功地合成出了锆钒蓝、锆镨黄、锆铁红陶瓷颜料,讨论了各工艺参数对颜料合成的影响,优化出了PDZ合成锆英石颜料的最佳工艺制度。