ASTM International - ASTM D6979-03
Standard Test Method for Polyurethane Raw Materials: Determination of Basicity in Polyols, Expressed as Percent Nitrogen
|Publication Date:||1 November 2003|
|ICS Code (Thermosetting materials):||83.080.10|
significance And Use:
This test method is suitable for quality control, as a specification test, and for research. The results are measures of batch-to-batch uniformity and may be useful in estimating... View More
This test method is suitable for quality control, as a specification test, and for research. The results are measures of batch-to-batch uniformity and may be useful in estimating reactivity.
5.1.1 The percent nitrogen can be used to characterize a polyol or indicate amounts of certain components in a polyol blend.
5.1.2 It is permissible to also express the results in equivalents of base per gram of sample, if desired.View Less
1.1 This test method measures the basic constituents in polyols that are soluble in glacial acetic acid and reactive with perchloric acid. Samples containing 0.3 - 10 % nitrogen have been evaluated by this method. This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions. (See Note 1.)
1.2 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 1-There is no equivalent ISO standard.