BS ISO 25761:2014
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
Hardcopy , PDF
English
31-05-2014
Important note : Users cannot be edited or removed once added to your Multi user PDF.
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.
| Committee |
PRI/42
|
| DevelopmentNote |
Supersedes 13/30278479 DC. (05/2014)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
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.
| 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Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009) |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 |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.