標準號：ANSI/ASTM D4671-1999
中文標準名稱：聚氨酯原料.多元醇不飽和度測定方法(08.03)
英文標準名稱：Polyurethane Raw Materials, Determination of Unsaturation of Polyols, Method for Testing (08.03)
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：2000/1/18 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.20
適用范圍： These test methods measure unsaturation in polyether polyols. (See Note 0.) Test Method A, High-Volume Reagent MethodUses about 50 mL of 0.1 M mercuric acetate reagent in methanol and 15 g or more of sample. These test methods use an indicator for colorimetric determination of an end point. It is recommended for polyols with low values (below 0.01 millequivalents per gram (meq/g)) of unsaturation where large sample sizes are required. Test Method B, Low-Volume Reagent MethodUses 2 mL of ca. 0.05 M mercuric acetate reagent in methanol and about 1 g of sample or less. These test methods use a potentiometric determination of an end point. 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 0There is no equivalent ISO standard.