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BS ISO 25761:2014

Current
Current

The latest, up-to-date edition.

Plastics. Polyols for use in the production of polyurethanes. Determination of basicity (total amine value), expressed as percent nitrogen
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

05-31-2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling
6 Apparatus
7 Interference
8 Reagents
9 Procedure
10 Expression of results
11 Precision and bias
12 Test report
Annex A (informative) - Determination of the factor
        F for 0,1 mol/l perchloric acid in acetic acid
Bibliography

Describes the basic constituents in polyols that are soluble in glacial acetic acid and reactive with perchloric acid.

The method specified in this International Standard measures the basic constituents in polyols that are soluble in glacial acetic acid and reactive with perchloric acid. Samples containing 0,3% to 10% of nitrogen have been evaluated by this method. The method is applicable to amine-based polyols, polyether polyols and polyether polyol blends that are used in polyurethane reactions. The results are measures of batch-to-batch uniformity and may be used to estimate reactivity in polyurethane reactions.

It is also permissible to express the results in equivalents of base per gram of sample.

NOTE This method is technically equivalent to that in ASTMD6979.

Committee
PRI/42
DevelopmentNote
Supersedes 13/30278479 DC. (05/2014)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 25761:2014 Identical

ISO 6353-1:1982 Reagents for chemical analysis — Part 1: General test methods
ISO 1042:1998 Laboratory glassware One-mark volumetric flasks
ISO 4788:2005 Laboratory glassware Graduated measuring cylinders
ASTM E 180 : 2003 Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009)
ASTM D 6979 : 2013-11 TEST METHOD FOR POLYURETHANE RAW MATERIALS: DETERMINATION OF BASICITY IN POLYOLS, EXPRESSED AS PERCENT NITROGEN
ISO 6353-3:1987 Reagents for chemical analysis — Part 3: Specifications — Second series
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods

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