ANSI/ASTM D4671-1999 聚氨酯原料.多元醇不饱和度测定方法(08.03)

标准号：ANSI/ASTM D4671-1999
中文标准名称：聚氨酯原料.多元醇不饱和度测定方法(08.03)
英文标准名称：Polyurethane Raw Materials, Determination of Unsaturation of Polyols, Method for Testing (08.03)
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：2000/1/18 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围： 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.