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现行 ASTM D7245-09(2021)
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Standard Test Method for Measuring Total Water and Volatiles in Liquid Coatings Which Produce Cure Water Upon Heating 用于测量加热时产生固化水的液体涂料中的总水分和挥发物的标准测试方法
发布日期: 2021-02-01
1.1 本试验方法旨在测量总水量,包括涂层热诱导冷凝反应产生的固化水。固化水不能通过试验方法直接测量 D4017 . 这项任务是通过测量加热过程中产生的蒸汽中的水含量来完成的。该试验方法将产生总含水量。本试验方法还允许同时测定总挥发物含量。本试验方法的结果可用于计算VOC含量。虽然本试验方法是为酚醛涂料设计的,但也可用于其他类型的涂料。 1.2 用于方法开发和评估的材料的总水价为20至37 %. 在这些值之外的涂层上使用本试验方法需要用户验证。 1.3 样品加热使用Brinkmann Instruments 832型干燥箱完成, 2. 或其他双方同意的替代方法,将所有析出的蒸汽通入卡尔费休滴定容器。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 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。 1.6 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====== 5.1 在测定VOC时,固化水在其他测试方法中被视为VOC,因为这些方法无法解释固化水。本试验方法允许在测量总水量时考虑固化水,该值包括固化水。 5.2 用该方法获得的总含水量和挥发物含量结果可用于实际 D3960 计算涂层的VOC。
1.1 This test method is designed to measure total water which includes cure water resulting from the heat induced condensation reaction of coatings. Cure water cannot be measured directly by Test Method D4017 . This task is accomplished by measuring water content in the vapors evolved during heating. This test method will yield total water content. This test method also permits for the simultaneous determination of total volatile content. The results of this test method may be used to calculate VOC content. Although this test method was designed for phenolic coatings, it can be used with other types of coatings. 1.2 Materials used for method development and evaluation had total water values from 20 to 37 %. Use of this test method on coatings outside these values will need to be validated by the user. 1.3 Sample heating is accomplished with a Brinkmann Instruments Model 832 drying oven, 2 or other mutually agreed upon alternative, passing all of the evolved vapors into a Karl Fischer titration vessel. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 ====== 5.1 In the determination of VOC, cure water is treated as a VOC in other test methods, as these methods are unable to account for cure water. This test method allows taking credit for cure water as total water is measured, a value which includes cure water. 5.2 Total water content and volatile content results obtained with this method may be used in Practice D3960 to calculate VOC of the coating.
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归口单位: D01.21
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