1.1 该分类涵盖硫化促进剂，并定义了其重要的化学和物理特性。本文概述的特性有助于质量控制；它们通常与橡胶化合物的性能特征直接或间接相关。 1.2 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 第1类，磺酰胺: 3.1.1 作为一个整体，2-苯并噻唑亚砜酰胺是当今橡胶工业中使用的主要硫硫化促进剂。这些材料在硫化中的作用是双重的。它们在加工温度下的交联或硫化操作中提供焦烧时间（延迟期）。延迟可避免加工过程中过早交联，例如混合、挤出等。一旦混合橡胶处于固化温度，这些材料就会促进快速固化（交联、硫化）。 3.1.2 此类材料中某些杂质的存在会影响其性能特征。 3.1.3 2-苯并噻唑亚砜酰胺在长期储存时会降解。显著性降低会影响其性能特征。特别是，材料的质量是存储时间、温度、相对湿度和材料杂质分布的函数；例如，游离胺、2-巯基苯并噻唑盐等。由于存储中的磺酰胺降解是一个自动催化过程（降解产物加速进一步降解），因此只有在长诱导期后才能发生显著降解。 3.2 第2类，噻唑类- 噻唑衍生物是一种多用途的硫化促进剂，在橡胶工业中单独或与其他促进剂结合广泛使用。 3.3 第3类，胍类- 胍作为主要硫化促进剂的重要性很小，但厚截面货物除外，因为其硫化速度通常很慢。作为二级促进剂，它们与噻唑类的其他促进剂一起使用。与单独使用时的单个成分相比，这些合成物的硫化速度更快，硫化程度更高。 噻唑胍混合物经常用于工业橡胶制品。 3.4 第4类，二硫代氨基甲酸盐- 二硫代氨基甲酸酯的硫化速度比硫脲快。二硫代氨基甲酸盐用作硫含量正常的超促进剂。它们也被用作其他加速器的辅助或激活剂。 3.5 类别5，Thiurams（二硫化物）- Thiuram二硫化物促进剂用于无元素硫的硫化，以生产基本上没有回复、具有低压缩永久变形和良好老化特性的橡胶化合物。 对于低硫硫化，硫脲通常与亚砜酰胺结合使用。在硫含量正常的情况下，thiurams起到超级加速器的作用。 3.6 类别6，Thiurams（二硫化物除外）- 此类包含其他非二硫化物的thiuram类型。它们被用作含硫量正常的超加速器。二硫醚、四硫醚和六硫醚可在不含硫或含硫量较低的情况下使用，以获得回复倾向大大降低的橡胶化合物。 3.7 这些材料的化学或物理特性或两者都可能影响其作为硫化促进剂的使用。

1.1 This classification covers vulcanization accelerators and defines their important chemical and physical characteristics. The properties outlined herein are useful for quality control; they can frequently be directly or indirectly related to the performance characteristics in rubber compounds. 1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 Class 1, Sulfenamides: 3.1.1 As a group, the 2-benzothiazyl sulfenamides are the principle sulfur vulcanization accelerators used in the rubber industry today. The role of these materials in vulcanization is dual. They provide scorch time (delay period) in the crosslinking or vulcanization operation at processing temperatures. The delay avoids premature crosslinking during the processing, for example, mixing, extrusion, etc. Once the mixed rubber is at the curing temperature, these materials promote a rapid rate of curing (crosslinking, vulcanization). 3.1.2 The presence of certain impurities in this class of materials can affect their performance characteristics. 3.1.3 The 2-benzothiazyl sulfenamides are subject to degradation on extended storage. Significance degradation can affect their performance characteristics. In particular, the quality of the material is a function of storage time, temperature, relative humidity, and the impurity profile of the material; for example, free amines, salts of 2-mercaptobenzothiazole, etc. Since sulfenamide degradation in storage is an autocatalytic process (degradation products accelerate further degradation), significant degradation may only occur after a long induction period. 3.2 Class 2, Thiazoles— Thiazole derivatives are versatile vulcanization accelerators that are widely used in the rubber industry either alone or in combination with other accelerators. 3.3 Class 3, Guanidines— The guanidines have little importance as primary vulcanization accelerators, except for thick-sectioned goods, because of a typically slow vulcanization rate. As secondary accelerators they are used with other accelerators of the thiazole class. These resulting combinations vulcanize faster and give higher levels of vulcanization than do their individual constituents when used separately. The thiazole-guanidine combinations are frequently used for technical rubber goods. 3.4 Class 4, Dithiocarbamates— Vulcanization with dithiocarbamates is faster than with thiurams. Dithiocarbamates are used as ultra accelerators with normal sulfur levels. They are also employed as secondaries or activators for other accelerators. 3.5 Class 5, Thiurams (disulfides)— Thiuram disulfide accelerators are used for vulcanization without elemental sulfur to produce rubber compounds that show essentially no reversion and that have low compression set and good aging characteristics. For low sulfur vulcanization, thiurams are normally used in combination with sulfenamides. With a normal amount of sulfur, thiurams act as ultra accelerators. 3.6 Class 6, Thiurams (other than disulfides)— This class contains other thiuram types that are not disulfides. They are used as ultra accelerators with normal amounts of sulfur. Di, tetra, and hexasulfides can be employed without sulfur or with low sulfur levels to obtain rubber compounds with much reduced reversion tendencies. 3.7 The chemical or physical characteristics, or both, of these materials may affect their use as vulcanization accelerators.