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BS EN ISO 14896:2009

Current
Current

The latest, up-to-date edition.

Plastics. Polyurethane raw materials. Determination of isocyanate content
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-09-2009

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
   4.1 Method A
   4.2 Method B
5 Application
6 Interferences
7 Sampling
8 Test conditions
9 Reagents
10 Apparatus
11 Method A - Toluene/dibutylamine with aqueous HCI
   11.1 Procedure
   11.2 Expression of results
   11.3 Precision and bias
   11.4 Test report
12 Method B - Toluene/TCB/DBA with methanolic HCI
   12.1 Procedure
   12.2 Expression of results
   12.3 Precision and bias
   12.4 Test report

Describes two methods for the measurement of the isocyanate content of aromatic isocyanates used as polyurethane raw materials.

This lnternational Standard specifies two methods for the measurement of the isocyanate content of aromatic isocyanates used as polyurethane raw materials. Method A is primarily applicable to refined toluene diisocyanate (TDI), methylene-bis-(4-phenylisocyanate) (MDI) and their prepolymers. Method B is applicable to refined, crude or modified isocyanates derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate) and polymethylene polyphenylisocyanate. It can also be used for isomer mixtures of toluene diisocyanate, methylene-bis-(4-phenylisocyanate) and polymethylene polyphenylisocyanate. Other aromatic isocyanates may be analysed by this method if precautions are taken to verify suitability. It is not applicable to blocked isocyanates.

Committee
PRI/42
DevelopmentNote
Supersedes BS EN ISO 9369. (09/2001) Supersedes 97/121687 DC. (04/2002)
DocumentType
Standard
Pages
16
PublisherName
British Standards Institution
Status
Current
Supersedes

ISO 4787:2010 Laboratory glassware Volumetric instruments Methods for testing of capacity and for use
ISO 385:2005 Laboratory glassware Burettes
ISO 6353-1:1982 Reagents for chemical analysis — Part 1: General test methods
ISO 648:2008 Laboratory glassware — Single-volume pipettes
ISO 4788:2005 Laboratory glassware Graduated measuring cylinders
ISO 14898:1999 Plastics Aromatic isocyanates for use in the production of polyurethane Determination of acidity
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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Hardcopy - English
PDF - English
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