Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D7394-18
• Năm ban hành / Publication date: 2018
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Rheological Characterization of Architectural Coatings using Three Rotational Bench Viscometers
• Chỉ số phân loại Quốc tế (ICS) / By field: 17.060 - Ðo thể tích, khối lượng, tỷ khối, độ nhớt
• Số trang / Page: 5
• Phạm vi áp dụng / Scope of standard: 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.