EN ISO 14896:2009
(Main)Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896:2009)
Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896:2009)
ISO 14896:2009 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.
Kunststoffe - Polyurethanrohstoffe - Bestimmung des Isocyanatanteils (ISO 14896:2009)
Diese Internationale Norm legt zwei Verfahren zur Bestimmung des Isocyanatanteils von aromatischen Isocyanaten fest, die als Polyurethanrohstoff verwendet werden. Verfahren A ist in erster Linie auf reines Toluoldiisocyanat (TDI), 4,4´-Methylendi-(phenylisocyanat) (MDI) und deren Vorpolymere anwendbar. Ver-fahren B ist auf reine, rohe oder modifizierte, von Toluoldiisocyanat, 4,4´-Methylendi-(phenylisocyanat) und Polymethylenpolyphenylisocyanat abgeleitete Isocyanate anwendbar. Es kann auch bei Isomergemischen von Toluoldiisocyanat, 4,4´-Methylendi-(phenylisocyanat) und Polymethylenpolyphenylisocyanat Anwendung finden. Wenn die Eignung des Verfahrens vorsorglich nachgewiesen wurde, dürfen auch andere aromatische Isocyanate damit analysiert werden. Das Verfahren ist nicht auf inaktivierte Isocyanate anwendbar.
Plastiques - Matières premières des polyuréthannes - Détermination de la teneur en isocyanate (ISO 14896:2009)
L'ISO 14896:2009 spécifie deux méthodes pour la détermination de la teneur en isocyanate des isocyanates aromatiques utilisés comme matières premières pour polyuréthannes. La méthode A est principalement applicable au toluylène-diisocyanate (TDI), au méthylène-bis-(4-phénylisocyanate) (MDI) purifiés et à leurs prépolymères. La méthode B est applicable aux isocyanates purifiés, bruts ou modifiés dérivés du toluylène-diisocyanate, du méthylène-bis-(4-phénylisocyanate) et du polyméthylène polyphénylisocyanate. Cette méthode peut également être utilisée avec les mélanges d'isomères de toluylène-diisocyanate, de méthylène-bis-(4-phénylisocyanate) et de polyméthylène polyphénylisocyanate. D'autres isocyanates aromatiques peuvent être analysés selon cette méthode si l'on prend soin de vérifier son adéquation. La présente méthode n'est pas applicable aux isocyanates séquencés.
Polimerni materiali - Surovine za poliuretane - Določevanje izocianata (ISO 14896:2009)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2009
1DGRPHãþD
SIST EN ISO 14896:2002
3ROLPHUQLPDWHULDOL6XURYLQH]DSROLXUHWDQH'RORþHYDQMHL]RFLDQDWD ,62
Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO
14896:2009)
Kunststoffe - Polyurethanrohstoffe - Bestimmung des Isocyanatanteils (ISO 14896:2008)
Plastiques - Matières premières des polyuréthannes - Détermination de la teneur en
isocyanate (ISO 14896:2009)
Ta slovenski standard je istoveten z: EN ISO 14896:2009
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 14896
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2009
ICS 83.080.10 Supersedes EN ISO 14896:2001
English Version
Plastics - Polyurethane raw materials - Determination of
isocyanate content (ISO 14896:2009)
Plastiques - Matières premières des polyuréthannes - Kunststoffe - Polyurethanrohstoffe - Bestimmung des
Détermination de la teneur en isocyanate (ISO 14896:2009) Isocyanatanteils (ISO 14896:2008)
This European Standard was approved by CEN on 19 January 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14896:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 14896:2009) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by August 2009, and conflicting national standards shall be withdrawn at
the latest by August 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 14896:2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 14896:2009 has been approved by CEN as a EN ISO 14896:2009 without any modification.
INTERNATIONAL ISO
STANDARD 14896
Third edition
2009-02-15
Plastics — Polyurethane raw materials —
Determination of isocyanate content
Plastiques — Matières premières des polyuréthannes — Détermination
de la teneur en isocyanate
Reference number
ISO 14896:2009(E)
©
ISO 2009
ISO 14896:2009(E)
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ii © ISO 2009 – All rights reserved
ISO 14896:2009(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Principle. 2
4.1 Method A. 2
4.2 Method B. 2
5 Application . 2
6 Interferences . 2
7 Sampling. 3
8 Test conditions . 3
9 Reagents. 3
10 Apparatus . 4
11 Method A — Toluene/dibutylamine with aqueous HCI . 4
11.1 Procedure . 4
11.2 Expression of results . 5
11.3 Precision and bias . 6
11.4 Test report . 6
12 Method B — Toluene/TCB/DBA with methanolic HCI . 7
12.1 Procedure . 7
12.2 Expression of results . 8
12.3 Precision and bias . 8
12.4 Test report . 9
ISO 14896:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 14896 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting
materials.
This third edition cancels and replaces the second edition (ISO 14896:2006), of which it constitutes a minor
revision, the main purpose of which was to combine the standard with its amendment
(ISO 14896:2006/Amd.1:2007), thereby adding a new subclause (12.1.8).
iv © ISO 2009 – All rights reserved
INTERNATIONAL STANDARD ISO 14896:2009(E)
Plastics — Polyurethane raw materials — Determination of
isocyanate content
SAFETY STATEMENT — Persons using this document should be familiar with normal laboratory
practice, if applicable. This document does not purport to address all of the safety concerns, if any,
associated with its use. It is the responsibility of the user to establish appropriate safety and health
practices and to ensure compliance with any regulatory requirements.
1 Scope
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.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 385, Laboratory glassware — Burettes
ISO 648, Laboratory glassware — Single-volume pipettes
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4787, Laboratory glassware — Volumetric glassware — Methods for use and testing of capacity
ISO 4788, Laboratory glassware — Graduated measuring cylinders
ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
ISO 6353-3, Reagents for chemical analysis — Part 3: Specifications — Second series
ISO 14898:1999, Plastics — Aromatic isocyanates for use in the production of polyurethane — Determination
of acidity
ISO 14896:2009(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
polyurethane
polymer prepared by the reaction of an organic di- or polyisocyanate with compounds containing two or more
hydroxyl groups
NOTE Polyurethanes may be thermosetting, thermoplastic, rigid or soft and flexible, cellular or non-cellular.
3.2
assay
percent by mass of a specific isocyanate present in a sample
3.3
isocyanate content
NCO content
percent by mass of the NCO groups present in a sample
3.4
amine equivalent
mass of sample that will combine w
...
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