ASTM International Standard Practice for Polyurethane Raw Materials: Gel Tests for Polyurethane Non-Foam Formulations ASTM D7997-21

1.1 This practice covers procedures for determining the gel times of polyurethane non-foam formulations using commercially available gel test equipment. 1.2 Definitions, terms, and techniques are described along with procedures for calculating sample weights. 1.3 The values stated in SI units are to be regarded as standard. 1.4 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. Note 1: There is no known ISO equivalent to this standard. 1.5 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.