ASTM D6437-22
Standard Test Method for Polyurethane Raw Materials: Alkalinity in Low-Alkalinity Polyols (Determination of CPR Values of Polyols)
| Standard number: | ASTM D6437-22 |
| Released: | 15.03.2022 |
| Status: | Active |
| Pages: | 3 |
| Section: | 08.03 |
| Keywords: | alkalinity; basicity; CPR; polyether polyol; polyol; polyurethane; prepolymer; raw materials; test method; titration; urethane; |
| ASTM number: | ASTM D6437 |
| Supersedes: | D6437-05R16E01 |
1.1 This test method covers measuring alkalinity in low-alkalinity (<0.002 meq/g basicity) polyols. This alkalinity is often expressed as CPR (controlled polymerization rate) of polyether polyols. This test method is not applicable to amine-based polyols.
1.2 The values stated in SI units 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.
Note 1: There is no known ISO equivalent to this standard.
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.