1.1 本试验方法涵盖氯丁二烯橡胶（CR）评估和质量控制试验的标准材料、试验配方、混合程序和试验方法。CR通常可根据其制造中使用的两种聚合改性剂进行分类:硫改性型和硫醇改性型。 1.2 以国际单位制表示的数值应视为标准。括号中的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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====== 4.1 本试验方法仅供参考，但可用于标准配方中不同橡胶样品的质量控制、研发测试和比较。 4.2 该试验方法也可用于获得客户接受橡胶的值。 4.3 本试验方法是对试验方法的修订 D3190 （1991年之前），用3-甲基噻唑烷硫酮-2取代乙烯硫脲（ETU），这是一种疑似致癌物。

1.1 This test method covers the standard materials, test formulas, mixing procedures and test methods for evaluation and quality control testing of chloroprene rubbers (CR). CR can be generally classified according to the two types of polymerization modifiers used in their manufacture: sulfur modified types and mercaptan modified types. 1.2 The values stated in SI-units are to be regarded as the standard. The values in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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 ====== 4.1 This test method is intended for referee purposes, but may be used for quality control, research and development testing and comparison of different rubber samples in a standard formula. 4.2 This test method may also be used to obtain values for customer acceptance of rubber. 4.3 This test method is a revision of Test Methods D3190 (prior to 1991), with 3-methyl thiazolidine thione-2 being substituted for ethylene thiourea (ETU), a suspected carcinogen.