ASTM-D6979 › Historical Revision Information
Standard Test Method for Polyurethane Raw Materials: Determination of Basicity in Polyols, Expressed as Percent Nitrogen
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Scope
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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
5.1 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 are 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.
Keywords
alkalinity; nitrogen; polyols; polyurethane; raw materials; test method; titration; ICS Number Code 83.100 (Cellular materials)
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Document Number
ASTM-D6979-13
Revision Level
2013 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Nov. 15, 2013
Document Type
Test Method
Page Count
3 pages
Committee Number
D20.22