共查询到19条相似文献,搜索用时 156 毫秒
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本文介绍了C.I.酸性棕28的合成工艺.酰化反应使用焦亚硫酸钠作为稳定剂,反应温度控制在80℃左右,反应收率达到95%;用正丁醇作为偶合反应的溶剂,产物的收率明显提高;络合反应控制pH在8~8.5,反应时间短,产品收率高,色光艳. 相似文献
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本文介绍了用氰基乙酸乙酯、乙胺、乙酰乙酸乙酯为原料,经过缩合、闭环、水解、磺甲基化合成C.I.活性黄95偶合组分的合成工艺,讨论了各步反应影响收率因素,产物纯度99%,总收率81%。 相似文献
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6-硝基-1,2-重氮氧基萘-4-磺酸与乙萘酚偶合,得偶合物I;2-氨基-4-硝基苯酚-6-磺酸重氮化与1-苯基-3-甲基-5-吡唑啉酮偶合,得到偶合物II;偶合物I与铬明矾在水杨酸存在下络合,得到单络合物III;络合物III再与偶合物II在碱性条件下络合,得到不对称金属络合染料C.I.酸性棕355。 相似文献
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讨论了主要合成条件和表面活性剂对C.I.颜料红146性能的影响。结果表明:合成C.I.颜料红146的较好工艺条件为:顺式偶合,偶合时间1小时,偶合结束pH为5.0,升温至90℃,保温30分钟,产品在80℃下干燥。添加表面活性剂后可得到色光偏蓝,着色力较高,分散性较好的C.I.颜料红146产品。 相似文献
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本文介绍了由间氨基苯磺酸、1-萘胺、对甲基苯酚为原料通过两次重氮化与偶合反应,最后将酚羟基转化为乙氧基,合成出C.I.酸性橙116的方法。对重氮化和偶合反应以及羟基化反应的条件和影响因素进行了研究。 相似文献
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采用自制的具有聚合物结构的端羟基聚醚型3-羟基-2-萘甲酸衍生物作为合成C.I.颜料红57∶1的第二偶合组分,采用共偶合工艺对C.I.颜料红57∶1进行了水性化改性。研究了衍生物在颜料合成中的最佳添加量,着重讨论了改性后的C.I.颜料红57∶1在水介质中的分散性能。结果表明:衍生物的最佳添加量为理论生成颜料质量的5%;与未改性的颜料相比,改性后颜料粒径缩小一半;离心分散100 min后所得水性色浆比吸光度为0.166,色浆黏度下降至102.7 mPa·s,即改性后的颜料分散稳定性得到了明显提高。 相似文献
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以3-氨基-4-甲氧基苯甲酰苯胺(RBKD)和3-羟基-N-(3-硝基苯基)-2-萘甲酰胺(NASBS)为中间体,通过重氮化和偶合反应,制备了单偶氮红色系C.I.PR31。偶合过程中首先选用松香酸对其进行水性化改性处理,进而通过溶胶-凝胶法在颜料表面包覆了1~3层的SiO_2颗粒层。经接触角、SEM、TEM、色光、热重分析测试,结果表明:经过松香酸处理的颜料样品晶体形貌可由长条状转变为圆片状,极性明显增强。松香酸占总反应物质量的3%时,颜料与水之间的接触角降至52.8°,粒径分布峰值和粒径分布宽度分别降至78 nm和0.01~0.54μm,具有较佳的亲水性能。包覆2层及2层以上的SiO_2可使颜料接触角降至0,完全转为亲水性。松香酸的加入在一定程度上会导致颜料色样偏向红色和蓝色,而SiO_2颗粒层则使颜料偏向绿色和蓝色。包覆2层SiO_2的C.I.PR31*-2SiO_2色差(ΔE)为0.96,着色力可达105.09%,氮气气氛中加热至290℃颜料晶体开始分解,达到了耐高温颜料的标准,可以用于水性分散介质。 相似文献
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以2-氯-4-硝基苯胺为原料,先经过重氮化、偶合反应合成出对硝基偶氮苯,经还原后再进行重氮化与偶合反应制备出最终产品分散黄104。研究了反应条件的影响,在优化条件下,总收率85.7%。 相似文献
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The synthesis of derivatives of Naphtol AS containing polar groups (–COOH, –SO3H) and factors affecting the reaction have been studied. Four derivatives of Naphtol AS containing –COOH or –SO3H groups in the 3- or 4- position of the phenyl ring were synthesized. Derivatives of Naphtol AS as the second coupling component were used in mixed coupling and the effect of its added amount on the colour strength, hue, flowability and dispersing extent (in water) of pigments was studied. 相似文献
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《Ceramics International》2016,42(6):6969-6977
Large scale B4C nano-powders were synthesized via a novel ball milling assisted reaction coupling self-propagating high temperature synthesis method using Mg, B2O3 and CH2H3Cl as the starting materials. The XRD, FTIR, Raman, EDX, FSEM, TEM, HRTEM and SAED were used to characterize the B4C samples. The optimum endothermic rate was 35%, when the samples presented fine and uniform regular morphology with an average particle diameter of about 100 nm. In addition, the reaction coupling principle, possible chemical reaction mechanism and the effects of the endothermic reaction rate were also discussed. Moreover, the commercial B4C (C-B4C) and homemade B4C (H-B4C) ceramics were prepared by spark-plasma sintering method at 1700 °C under 30 Mpa. Compared with the C-B4C ceramic, the values of relative density, vickers hardness and fracture toughness of the H-B4C ceramic were increased by 2.1%, 9.2% and 20.1%, respectively, demonstrating high sintering activity of the homemade B4C nano-powders. 相似文献
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微波强化固相合成伐普肽 总被引:2,自引:0,他引:2
以伐普肽为研究对象,用固相合成方法,并对偶合反应进行微波强化。利用正交实验研究了微波强化对偶合反应的促进作用。正交实验结果用多元非线性回归分析和响应面法优化,确定优化条件为:反应时间5min,包括1min升温、4min维持,最高反应温度60℃。与常规偶合反应相比,提高反应效率12~36倍。常规接肽反应保护氨基酸用量与固相合成树脂摩尔数之比为3倍,在优化的微波强化反应条件下,保护氨基酸用量减少为过量1倍;保护氨基酸与树脂的偶合效率明显提高,伐普肽得率从常规合成的48%提高到76%。其结构经质谱、高分辨质谱、红外光谱、核磁共振氢谱证实,与目标化合物的结构一致。 相似文献
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Stephen Mallon Callum A. S. Hill 《International Journal of Adhesion and Adhesives》2002,22(6):465-469
The reaction of softwood thermomechanically pulped fibres with succinic anhydride (SA) and its subsequent reaction with hexamethylene diamine (HMDA) were examined, the latter employing the coupling agents dicyclohexylcarbodiimide, or diisopropylcarbodiimide. FTIR and 13C NMR studies showed amide linkages were produced between SA modified fibres and the diamine. Wood veneers were covalently bonded using this technology. It was found that during hot pressing bonding occurs between SA treated veneers and HMDA without the need for a coupling agent. 相似文献
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