新型橡胶与金属硫化粘合剂：三聚硫氰酸衍生物

三聚硫氰酸衍生物是一种新型的多功能化精细化工产品。本文概述了三聚硫氰酸及其衍生物在国内外的生产与研究进展,并重点介绍了三聚硫氰酸衍生物在橡胶与金属直接硫化粘合方面的应用情况。     

三聚硫氰酸在橡胶工业中的应用

三聚硫氰酸(TCY)是一种新型的多功能化精细化工产品.本文详细介绍了三聚硫氰酸作为丙烯酸酯橡胶和聚氯醚弹性体硫化剂、橡胶与金属直接硫化粘合增粘剂以及其它橡塑产品交联剂的应用现状和最新进展,并提出了三聚硫氰酸的发展趋势.     

三聚硫氰酸单钠盐的制备及应用研究进展

三聚硫氰酸单钠盐是一种新型的多官能团化精细化学品。介绍了三聚硫氰酸单钠盐的制备方法,以及其在橡胶硫化、橡胶与金属的硫化粘合等领域的应用研究进展。     

高效液相色谱法测定小麦粉及面粉处理剂中三聚硫氰酸三钠盐的含量

建立了小麦粉及面粉处理剂中三聚硫氰酸三钠盐的高效液相色谱(HPLC)检测方法。对比了不同提取试剂及提取方式对三聚硫氰酸三钠盐回收率的影响,并考察了三聚硫氰酸三钠盐在样品提取液中的稳定性。在最优实验条件下,三聚硫氰酸三钠盐在浓度0.05~2.0μg/mL范围内线性良好,相关系数R2=1.000 0,方法检出限为0.4 mg/kg,定量限为1.0 mg/kg。小麦粉中三聚硫氰酸三钠盐的加标回收率为80.4%~84.8%,RSD为1.4%~3.1%;面粉处理剂中三聚硫氰酸三钠盐的加标回收率为87.9%~91.5%,RSD为2.2%~3.2%。     

三聚硫氰酸三钠盐的合成与工艺优化

以三聚氯氰、硫氢化钠、氢氧化钠为起始原料,在温度30~70℃,pH值7~11的条件下,得到三聚硫氰酸三钠盐,并对制备的三聚硫氰酸三钠盐的工艺条件进行选择和优化。     

化学镀镍金属骨架与橡胶直接硫化粘合技术

介绍化学镀镍金属骨架与橡胶直接硫化粘合技术。在胶料中添加粘合剂三聚硫氰酸衍生物,可实现化学镀镍金属与橡胶的直接硫化粘合。化学镀镍金属与天然橡胶(NR)轮胎钢丝帘线覆胶胶料、NR建筑减震支座胶料、NR桥梁减震支座胶料和丁腈橡胶(NBR)油封胶料的直接硫化粘合强度较高,其技术可在化学镀镍金属骨架橡胶制品生产中实际应用。     

三聚硫氰酸三钠盐的合成及应用

以三聚氯氰、硫化钠、硫氢化钠和氢氧化钠为主要原料,在反应温度65~70℃,反应时间3.5 h,n(三聚氯氰)∶n(总硫)=1∶3.1,pH值在12.0~12.5的条件下合成了三聚硫氰酸三钠盐。并通过浸出试验,研究了三聚硫氰酸三钠盐对飞灰中重金属离子的稳定化效果。     

镀镍金属与橡胶的硫化粘合

介绍了不同橡胶胶料与镀镍金属的直接硫化粘合实验结果及粘合机理。在胶料中混入三聚硫氰酸类化合物，并将其应用于油封胶料中，试制外骨架油封产品，满足了粘合技术要求，可用于实际生产。     

镀镍金属与橡胶的硫化粘合技术

介绍了一元，二元，三元和二元复合镀镍金属与橡胶的硫化粘合技术。胶料 采用硫黄硫化体系和钴盐粘合增进剂，对镀层进行浸渍，电解聚合等预处理以使其有机化或形成三聚硫氰酸化合物膜，在镀层中引入活性金属等是提高镀镍金属与橡胶硫化粘合性能的有效方法。     

三聚硫氰酸单钠盐的制备及应用研究进展

三嗪硫醇类化合物是一类新型多官能团化精细化学品,具有稳定的碳氮六元杂环结构以及多巯基官能团结构优势,近年来其在橡胶制品的粘合领域引起广泛关注。重点介绍三聚硫氰酸单钠盐的理化特性、制备方法以及在不同橡胶与金属硫化粘合领域的应用研究进展。     

Herstellung und Anwendungsmöglichkeiten von Cyclododecatrien und Cyclooctadien

Production and applications of cyclododecatriene and cyclooctadiene. Today the cyclic trimerization of 1,3-butadiene to cyclododecatriene and the synthesis of cyclododecatriene derivatives are accomplished on an industrial scale using fully developed processes. This paper surveys the variety of the derivatives and their applications. The cyclic dimerization of 1,3-butadiene to cyclooctadiene and the synthesis of cyclooctadiene derivatives have also been performed on a technical scale for some years now. The paper gives examples of these derivatives, including polyoctenamer a rubber whose properties are considered to be due to the presence of cyclic macromolecules.     

Trimerization of Butene over Ni-doped Zeolite Catalyst: Effect of Textural and Acidic Properties

The amount of acid sites on external surface and L/B ratio of the zeolite catalysts are close relative to the catalytic performance of the catalysts in butene trimerization. The doping of Ni into the zeolite modifies the textural and acidic properties of the catalyst. NiHβ(32) exhibits the highest catalytic performance and the lowest apparent activity energy in butene trimerization among the investigated catalysts, due to the reason that it has the proper amount of acid sites on external surface and the proper L/B ratio.     

Catalytic cascade acetylation-alkylation of biofuran to C17 diesel precursor enabled by a budget acid-switchable catalyst

Lignocellulosic biomass is a promising feedstock for the synthesis of value-added chemicals and biofuels. However, one of the biggest challenges for producing high-quality diesel fuels is the lack of sufficient carbon-chain length in biomass derivatives. In this study, a C17 diesel precursor 1,1,1-tris(5-methyl-2-f uryl)ethane (TEMF) with a yield of ca. 70% was synthesized from the cascade acetylation-hydroxyalkyla tion/alkylation of bio-based 2-methylfuran (MF) with acetic anhydride (AA) catalyzed by acid-treated montmorillonite with enhanced acidity and improved porosity. The catalytic mechanism of the cascade reaction process was investigated over different types of acid species (Brønsted acid and Lewis acid), and the influence of in situ formed acetic acid was also examined. A synergistic effect was observed to enable the synthesis of TEMF from the trimerization of MF with AA, in which Lewis acid and weak Brønsted acid species mainly catalyze the acetylation and hydroxyalkylation processes, while the subsequent alkylation step is mainly catalyzed by strong Brønsted acid.     

MDI-50三聚反应动力学的研究

采用2,4,6-三(二甲胺基甲基)苯酚(DMP-30)三聚催化剂合成了二苯基甲烷二异氰酸酯(MDI-50)的三聚体,用傅里叶变换红外光谱(FT-IR)和凝胶色谱(GPC)对产物进行了表征,并用FT-IR跟踪方法研究了MDI-50三聚反应的反应动力学。结果表明,MDI-50三聚反应是一级反应,60℃时反应的速率常数Ka为0.00760min-1,平均活化能为79.33kJ/mol。     

Folgeprodukte halogenierter Aldehyde. XV. Derivate der Aryl-(3,3,3-trichlor-2-hydroxy-propyl)-ketone

Derivatives of Halogenated Aldehydes. XV. Derivatives of Aryl 3,3,3-trichloro-2-hydroxy-propyl Ketones From aryl 3,3,3-trichloro-2-hydroxy-propyl ketones 1a – e , the oximes 6a – e , phenylhydrazones 5a – e , aryl 2,3,3,3-tetrachloro-propyl ketones 3b – d and aryl 3,3,3-trichloropropen(1)-yl ketones 2a – e are prepared. The phenylhydrazones 5a , b form the substituted Δ³-1,2,4-triazolines 4a , b by treatment with thiocyanic acid.     

不同二异氰酸酯三聚反应分子模拟与反应动力学研究

利用DMol3分子模拟软件对二苯基甲烷二异氰酸酯(MDI)、氢化二苯基甲烷二异氰酸酯(HMDI)、异佛尔酮二异氰酸酯(IPDI)3种异氰酸酯自聚反应进行了模拟计算;利用傅里叶变换红外光谱(FT-IR)对不同异氰酸酯在催化剂2,4,6-三(二甲胺基甲基)苯酚(DMP-30)作用下的三聚反应进行了跟踪,研究了不同催化剂用量、反应温度、反应时间下3种异氰酸酯的自聚反应动力学。结果表明,异氰酸酯自聚反应倾向生成稳定的六元环结构;3种异氰酸酯三聚反应均为二级反应,MDI在加入催化剂质量分数0.05%时,反应的活化能为26.1 kJ/mol,IPDI和HMDI在加入催化剂质量分数2%时,反应的活化能分别为13.5 kJ/mol和49.9 kJ/mol。     

Oligomerization of isobutene over aluminum chloride-loaded USY zeolite catalysts

Oligomerization of isobutene has been investigated over AlCl₃-loaded USY zeolite catalysts in order to produce triisobutenes or remove/separate isobutene from C₄ streams. Stable isobutene conversion and high selectivity for trimers and tetramers were attained over the modified zeolite with high ratio of Lewis acid site-to-Brønsted acid site, suggesting that a potential trimerization catalyst can be obtained easily by loading a Lewis acid into an acidic zeolite catalyst. This catalyst can be facially produced by physical mixing and can be easily restored its activity after deactivation by simple calcinations.     

双(三正丁基)氧化锡参与的异氰酸酯环三聚反应

研究三种异氰酸酯与双（三正丁基）氧化锡在等摩尔比时的反应。证明相互作用的产物是以缔合形式存在的相应锡的氨基甲酸酯。双（三正丁基）氧化锡碳酸酯,氨基甲酸酯及其在异氰酸酯环三聚反应中水解产物催化活性的研究,证明氨基甲酸酯或它与异氰酸酯相互作用的产物,在双（三正丁基）氧化锡参加下,对三聚过程的催化起决定作用。     

Synthesis and evaluation of polytriethanolamine monooleates for oil-based muds

New emulsifiers were developed by esterification of polytriethanolamine based on the dimerization and trimerization of triethanolamine. The dimer and trimer were esterified with oleic acid to prepare monoesters of di-triethanolamine and tri-triethanolamine. The synthesized esters were evaluated as water-in-oil emulsifiers in oil-based muds, which are the circulating fluids used in rotary drilling to perform various functions required in the drilling operation, such as control of density, flow, and filtration properties. The dimer and trimer of triethanolamine were also esterified with hydrolyzed cottonseed oil, and the resulting esters were evaluated as commercial emulsifiers for oil-base muds.