1.1 本规程描述了使用三种常用的旋转台架粘度计对水性建筑涂料进行流变特性表征的流行行业协议。每个粘度计在不同的剪切速率条件下操作，以分别在本文定义的低剪切速率、中剪切速率和高剪切速率下测定涂层粘度。提供了根据粘度测量预测某些涂层性能财产的一般指南。通过适当的相关性和随后对性能指南的修改，该实践有可能对其他类型的水性和非水性涂料进行表征。 1.2 常用粘度单位（Krebs单位、KU和Poise、P）的值应视为标准值。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 这种做法的一个重要特点是，能够使用油漆配方师和油漆质量控制（QC）分析师通常使用的相同的台架粘度计和测试方案，在广泛的剪切速率范围内测量涂层流变性。 通过使用该程序，可以在不使用昂贵的实验室流变仪的情况下测量涂层的剪切流变性，并且可以根据这些测量结果进行性能预测。 5.2 低剪切粘度（LSV）- 本实践中低剪切粘度的测定可用于预测涂料的相对“罐内”性能，以确定其悬浮颜料或防止脱水的能力，或两者兼而有之。LSV还可以预测辊涂、刷涂或喷涂后的平整度和抗垂度的相对性能。 图1 显示了几种涂层财产的预测低剪切粘度关系。 图1 低剪切粘度（LSV） 5.3 中剪切粘度（MSV）- 在本实践中，MSV（涂层稠度）的测定通常是获得的第一个粘度。 该粘度反映了涂料在混合、浇注、泵送或手动搅拌时的流动阻力。建筑涂料几乎总是具有中剪切粘度的目标规范，这通常通过调整涂料中增稠剂的水平来获得。因此，理想情况下，中剪切粘度是所测试的给定系列涂层的一个常数，以提供低剪切粘度和高剪切粘度的有意义的比较。在相同KU值的粘度下，MSV也可用于获得相同涂层中不同增稠剂的相对中剪切增稠剂效率（MSTE），表示为lb增稠剂/100 gal湿涂层或g增稠剂/L湿涂层。 5.4 高剪切粘度（HSV）- 在本实践中，高剪切粘度是通过刷子或滚筒（通常称为刷子）涂敷时涂层流动阻力的量度- 阻力或滚动阻力。该粘度与涂层提供一层涂层隐藏的能力、其应用的容易程度（刷涂或滚动阻力）以及其扩散速率有关。 图2 显示了相对涂层性能的高剪切粘度关系预测。 图2 高剪切粘度（HSV）

1.1 This practice describes a popular industry protocol for the rheological characterization of waterborne architectural coatings using three commonly used rotational bench viscometers. Each viscometer operates in a different shear rate regime for determination of coating viscosity at low shear rate, mid shear rate, and at high shear rate respectively as defined herein. General guidelines are provided for predicting some coating performance properties from the viscosity measurements made. With appropriate correlations and subsequent modification of the performance guidelines, this practice has potential for characterization of other types of aqueous and non-aqueous coatings. 1.2 The values in common viscosity units (Krebs Units, KU and Poise, P) are to be regarded as standard. 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 ====== 5.1 A significant feature of this practice is the ability to survey coating rheology over a broad range of shear rates with the same bench viscometers and test protocol that paint formulators and paint quality control (QC) analysts routinely use. By using this procedure, measurement of the shear rheology of a coating is possible without using an expensive laboratory rheometer, and performance predictions can be made based on those measurements. 5.2 Low-Shear Viscosity (LSV)— The determination of low-shear viscosity in this practice can be used to predict the relative “in-can” performance of coatings for their ability to suspend pigment or prevent syneresis, or both. The LSV can also predict relative performance for leveling and sag resistance after application by roll, brush or spray. Fig. 1 shows the predictive low-shear viscosity relationships for several coatings properties. FIG. 1 Low Shear Viscosity (LSV) 5.3 Mid-Shear Viscosity (MSV)— The determination of MSV (coating consistency) in this practice is often the first viscosity obtained. This viscosity reflects the coatings resistance to flow on mixing, pouring, pumping, or hand stirring. Architectural coatings nearly always have a target specification for mid-shear viscosity, which is usually obtained by adjusting the level of thickener in the coating. Consequently, mid-shear viscosity is ideally a constant for a given series of coatings being tested to provide meaningful comparisons of low-shear and high-shear viscosity. With viscosities at the same KU value, MSV can also be used to obtain the relative Mid-Shear Thickener Efficiency (MSTE) of different thickeners in the same coating expressed as lb thickener/100 gal wet coating or g thickener/L wet coating. 5.4 High-Shear Viscosity (HSV)— High-shear viscosity in this practice is a measure of the coatings resistance to flow on application by brush or roller, which is often referred to as brush-drag or rolling resistance respectively. This viscosity relates to the coatings ability to provide one-coat hiding, its ease of application (brushing or rolling resistance), and its spread rate. Fig. 2 shows high-shear viscosity relationship predictions for relative coating performance. FIG. 2 High Shear Viscosity (HSV)