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  • 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

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  31-05-2014

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

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

    Scope - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Committee PRI/42
    Development Note Supersedes 13/30278479 DC. (05/2014)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    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Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009)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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