环保型促进剂TBSI替代促进剂DZ在橡胶与钢丝粘合胶料中的应用研究

研究环保型迟效性慢速促进剂TBSI替代促进剂DZ在橡胶与钢丝粘合胶料中的应用。结果表明：促进剂TBSI等量替代促进剂DZ,胶料硫化平坦期延长,抗硫化返原性能提高,但焦烧时间略短,硫化速度略快,橡胶与钢丝的初始粘合性能略有降低;促进剂TBSI减量替代促进剂DZ并酌量添加防焦剂CTP,胶料的焦烧时间、正硫化时间和粘合性能与促进剂DZ胶料相当,并保持了抗硫化返原性能和耐热老化性能的优势。     

话说硫化促进剂

硫化促进剂对使用硫磺硫化的体系来说是非常重要的。在橡胶中加入硫磺一般用加热方式可达到硫化的目的,但是,如果没有硫化促进剂硫化就会变得非常缓慢,并且硫化胶的性能也是非常之低。硫化促进剂可加速硫化反应并改善橡胶的性能。     

乙基黄原酸锌的制备及性能

本研究首先介绍了橡胶的硫化机理,然后阐述了国内外橡胶硫化促进剂的发展现状。在实验室通过自己的实验合成了橡胶硫化促进剂乙基黄原酸锌(ZEX),理解了促进剂乙基黄原酸锌(ZEX)在橡胶硫化过程中的性能。最后通过粉末XRD衍射、红外(FT-IR)、热重(TG/DSC)等分析方法,对目标化合物ZEX进行了表征研究,推测其结构、组成并关联其性能。     

促进剂种类对橡胶-钢丝粘合和胶料性能的影响

研究促进剂NOBS,CBS,DZ,TBBS和辅助促进剂HMT对橡胶-钢丝粘合和胶料性能的影响。结果表明:促进剂NOBS不适于橡胶-钢丝粘合体系;促进剂CBS和DZ可适量(0.5~1份)用于橡胶-钢丝粘合体系;添加促进剂TBBS的橡胶-钢丝粘合性能和胶料综合性能较好;促进剂TBBS搭配辅助促进剂HMT使用,橡胶-钢丝粘合性能以及胶料焦烧安全性和硫化效率提高,硫化胶物理性能呈下降趋势,辅助促进剂HMT的用量需严格控制。     

二元共聚氯醚橡胶的硫化

研究了单用促进剂NA-22硫化体系、促进剂NA-22与其他促进剂并用的硫化体系以及促进剂NA-22与不同稳定剂配合对二元共聚氯醚橡胶（ECO）性能的影响。实验结果表明,并用某些硫化助剂对ECO的性能改善并不明显;促进剂NA-22／二盐硫化体系最好。     

环保型促进剂TBSI替代促进剂DCBS在橡胶与钢丝粘合胶料中的应用研究

研究环保型迟效性慢速促进剂TBSI替代促进剂DCBS在橡胶与钢丝粘合胶料中的应用。结果表明:促进剂TBSI等量替代促进剂DCBS,胶料的硫化平坦期延长,抗硫化返原性能提高,但焦烧时间略短,硫化速度略快,与钢丝的初始粘合性能略有降低;促进剂TBSI减量替代促进剂DCBS并酌量添加防焦剂CTP,胶料的焦烧时间、硫化速度和粘合性能与促进剂DCBS胶料相当,并保持了抗硫化返原性能和耐热老化性能的优势。     

促进剂对丙烯酸酯橡胶/乙烯丙烯酸酯橡胶共混胶性能的影响

考察了传统促进剂DOTG、环保促进剂XLA-60和ACT 55对丙烯酸酯橡胶(ACM)/乙烯丙烯酸酯橡胶(AEM)共混胶的硫化特性、物理机械性能、耐热空气老化性能、耐油性能、压缩永久变形及耐低温性能的影响。结果表明,与传统促进剂DOTG相比,加入新型环保促进剂ACT 55或XLA-60的ACM/AEM共混胶的硫化速率均有所提高,硫化胶交联密度增大,其中加入ACT 55的共混胶交联密度最大。促进剂ACT 55和XLA-60均能提高共混硫化胶的物理机械性能、耐热空气老化性能和压缩永久变形性能。添加XLA-60的共混硫化胶有较好的耐ASTM No.1标准油性能,而在IRM 903标准油中,加入DOTG的共混硫化胶的性能更好。     

橡胶硫化促进剂MBT绿色化工艺进展

<正>2-巯基苯并噻唑又称为促进剂MBT,在橡胶硫化促进剂体系中能与橡胶快速硫化,硫化特性好,硫化性能优良,用途广,消耗量大,是橡胶加工工业中广泛使用的一种通用型促进剂,同时也是生产目前使用量最大的次磺酰胺类促进剂的的母体原料。促进剂MBT的合成工艺有苯胺法、硝基苯法、邻硝基氯苯法等。目前国内主要采用苯胺法工艺进行合成。苯胺法是指苯胺和二硫化碳及硫黄在     

硫化促进剂ZDC的生产方法

硫化促进剂ＺＤＣ的生产方法马草（沈阳市辽中化工总厂）本文介绍了橡胶硫化促进剂的作用和种类，阐述了促进剂ＺＤＣ的合成原理，生产工艺以及提高其收得率的措施。１、前言在橡胶硫化中，凡能加快橡胶与硫化剂反应速率的物质，统称为硫化促进剂，简称促进剂。它在橡胶硫...     

山东迪科化学科技有限公司(烟台新特耐化工有限公司)

我公司是专业橡胶助剂生产企业,产品科技含量高,普遍具有降低生产成本、绿色环保等特点。一、橡胶防老剂防老剂D-50,4010NA-M,4020-M,264-A。二、橡胶防老(抗氧)剂(普遍具有抗氧化、防黄变的特点)防老剂MB-A,MBZ-A,1010-A,2246-A以及耐晒白。三、橡胶硫化促进剂促进剂XT380:性能类似促进剂DM促进剂XT480:性能类似促进剂CBS(CZ)促进剂XT580:性能类似促进剂NOBS     

橡胶促进剂NS的绿色合成工艺与应用研究进展

橡胶硫化促进剂按照化学结构可以分为醛胺类、秋兰姆类、硫脲类、二硫代氨基甲酸盐类、噻唑类、胍类、黄原酸盐类和次磺酰胺类等,其中次磺酰胺类促进剂具有抗烧焦时间长、硫化活性大、硫化平坦性高、力学性能优良等优点,应用最为广泛。促进剂NS（N-叔丁基-2-苯并噻唑次磺酰胺,TBBS）与其他次磺酰胺类促进剂相比,因在硫化过程中不产生致癌毒性物质亚硝胺,被誉为“标准促进剂”。本文回顾了以次氯酸钠为氧化剂合成促进剂NS的传统方法;综述了催化氧化法、氯气氧化法、电解氧化法和双氧水氧化法等绿色合成工艺;简要概述了微通道反应器在合成促进剂NS方面的工业应用。同时简介了促进剂NS在天然橡胶、丁苯橡胶、二氧化硅填充橡胶的改性剂以及合成氨基磷酸酯等领域的应用。     

天然橡胶发泡胶球的研制

用天然橡胶制备彩色发泡胶球,研究了发泡剂及发泡助剂、硫化体系、填充体系、混炼和硫化工艺以及发泡工艺等对发泡胶球品质的影响。结果表明,发泡剂选用二亚硝基五亚甲基四胺与小苏打和尿素脂BK并用体系可使胶球的泡孔细密均匀,气味很小;硫化体系采用临界温度较低的促进剂TT、CZ及M与硫黄并用能使硫化程度与发泡速率很好地匹配;选择轻质碳酸钙和滑石粉作为填充体系、使用门尼黏度为20～40的胶料及采用二段硫化工艺时所制备发泡胶球的泡孔细密、结构理想,发泡倍率与国外胶乳发泡制品相当。     

Studies on novel binary accelerator system in sulfur vulcanization of natural rubber

The synergistic activity of binary accelerator systems in rubber vulcanization is well known. Thiourea and its derivatives are important secondary accelerators in this context. It is suggested that thiourea containing binary systems of rubber vulcanization proceed by a nucleophilic reaction mechanism. Amidinothioureas (ATUs), which are derivatives of thiourea, have been investigated extensively as secondary accelerators. One of the aims of this study was to get further proof with regard to the theory of the nucleophilic reaction mechanism in such binary systems. In the present study phenyl substituted ATU was used as a secondary accelerator along with mercaptobenzothizyl disulfide, tetramethyl thiuram disulfide, or cyclohexyl benzthiazyl sulfenamide in the sulfur vulcanization of natural rubber. The results showed an appreciable reduction in the cure time for the mixes containing the ATU compared to the reference mixes. These results are indicative of a nucleophilic reaction mechanism in the vulcanization reaction under review. These vulcanizates also showed comparatively better tensile properties and good retention of these properties after aging. The optimum dosages of the secondary accelerator required for these vulcanization reactions were also derived. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1–8, 2001     

Über die vernetzung eines ungesättigten äthylen-propylen-terpolymer-kautschuks

The various aspects of the sulfur vulcanization chemistry and mechanism of ?Nordel”? hydrocarbon rubber, an ethylene-propylene terpolymer, are discussed. The chemical nature of the reactions undergone by the accelerators has been found to be analogous to those observed for natural rubber and SBR. During vulcanization approximately 50% of the double bonds are saturated, and approximately one crosslink is formed for each two double bonds initially present. The type of crosslink formed has been examined and the vulcanization kinetics studied with the aid of a Monsanto rheometer.     

橡胶和塑料助剂的现状与展望

综述了橡胶和塑料助剂的国内外现状与发展趋势。为了符合环保法规,优化产品的成本/效能比,满足用户需求,今后技术改造和新产品开发将会持续活跃。     

Structural characterization of vulcanizates. XII. Efficient vulcanization using a sulfenamide–thiuram disulfide accelerator system

Vulcanizates obtained from the sulfur vulcanization of natural rubber using a combination of the accelerators N-cyclohexylbenzothiazole-2-sulfenamide (CBS) and tetramethylthiuram disulfide (TMTD) have been analyzed in terms of the numbers of poly-, di-, and monosulfide crosslinks, network-bound accelerator residues, and cyclic sulfide chain modifications as a function of cure time. The vulcanization system produced mainly monosulfide crosslinks at optimum cure, although there were differences in detail between this mixed system and a previously reported efficient sulfur vulcanization (EV) system using a high ratio of CBS to sulfur.     

New binary systems containing TMTD‐amidino phenyl thiourea and CBS–amidinophenyl thiourea for the vulcanization and rheological behavior of natural rubber latex

The use of accelerators in rubber latex is basically different from their use in dry rubber. In the present study, N amidino N'phenyl thiourea (APT) which is more nucleophilic than thiourea was studied as a secondary accelerator along with tetra methyl thiuram disulphide (TMTD) and N‐cyclohexylbenzothiazyl sulphenamide (CBS) in the vulcanization of natural rubber latex. These binary systems were found to be very effective in reducing the vulcanization time. The optimum dosages for this non‐toxic secondary accelerator required were derived. Rheological studies of the compounded latex show that the introduction of APT in these systems does not have adverse effect in processing in comparison with the thiourea systems. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Studies on novel binary accelerator system in sulfur vulcanization of natural rubber

The synergistic activity of binary accelerator systems in rubber vulcanization is well known. Binary accelerator systems are being widely used in industry and are becoming increasingly popular because of the fact that such mixed systems can effectively prevent prevulcanization, permit the vulcanization to be carried out at a lower temperature in a shorter time, and produce a vulcanizate with superior mechanical properties compared to those of a stock cured with a single accelerator. Thiourea and its derivatives are important secondary accelerators in this context. It is suggested that thiourea containing binary accelerator systems cause rubber vulcanization to proceed by a nucleophilic reaction mechanism. In the present study 1‐phenyl‐5‐ortho, ‐meta, and ‐para‐tolyl derivatives of 2,4‐dithiobiurets, which are more nucleophilic than thiourea and vary in their nucleophilic reactivity, are used as secondary accelerators along with 2‐morpholinothiobenzothiazole in the vulcanization of natural rubber. The results show an appreciable reduction in the cure time for the mixes containing the dithiobiurets compared to the reference mix. These results are indicative of a nucleophilic reaction mechanism in the vulcanization reaction under consideration. These vulcanizates also demonstrate comparatively better tensile properties and good retention of these properties after aging. An attempt is also made to correlate the variation in physical properties to chemical crosslink formation in the various vulcanizates. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3173–3182, 2003     

不同温度下天然橡胶中挥发性有机化合物的释放

通过静态顶空与气相色谱-质谱联用的方法,探讨了不同温度（80 ℃和130 ℃）和不同硫化温度（130,140,150 ℃）对两种天然橡胶（SVR 3 L和SPR 10#）中挥发性有机化合物（VOCs）的影响。结果表明,130 ℃下,两种天然橡胶中的主要VOCs均能挥发并被检出,SVR 3 L中的VOCs主要是乙醇和乙酸;SPR 10#中除乙醇和乙酸外,主要为醛类物质。硫化温度对两种天然橡胶中VOCs总量的影响不大,说明硫化过程中的高温高压条件可使天然橡胶中的VOCs挥发,硫化胶中的VOCs主要来源于硫化促进剂的热分解产物。     

Effect of Substituted Dithiobiurets—Tetramethyl Thiuram Disulfide (TMTD) Binary Accelerator Systems in the Vulcanization of NR-SBR Blends

1-Phenyl 2,4-dithiobiuret and 1,5-diphenyl 2,4-dithiobiuret were studied as secondary accelerators along with tetramethyl thiuram disulfide (TMTD) in the vulcanization of a blend of natural rubber (NR) and styrene-butadiene rubber (SBR). These binary systems were found to be very effective and reduced the optimum vulcanization time considerably. 1-Phenyl 2,4-dithiobiuret, which is more nucleophilic than 1,5-diphenyl 2,4-dithiobiuret, reduced the vulcanization time more, indicating a nucleophilic reaction mechanism in the vulcanization reactions under review. In both cases the optimum dosage of the secondary accelerator was derived. Physical properties such as modulus, tensile strength, elongation at break, hardness, compression set, heat buildup, resilience, etc., of the vulcanizates were studied before and after heat aging and compared with a reference mix. There is substantial increase in many of these properties compared with TMTD alone or with the reference mix. Chemical characterization of the vulcanizates was also carried out to correlate the physical properties with the type of chemical crosslinks formed in these systems.