EN 1242:2005
(Main)Adhesives - Determination of isocyanate content
Adhesives - Determination of isocyanate content
This European Standard specifies a method for the determination of the isocyanate content of adhesives, adhesive components and their basic constituents.
It is not applicable to products containing blocked isocyanate groups which can be liberated by the reagents used in this test method.
Klebstoffe - Bestimmung des Isocyanatgehaltes
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Isocyanatgehaltes von Klebstoffen,
Klebstoff-Komponenten und deren Grundbestandteile fest.
Dieses Verfahren ist nicht anwendbar bei Produkten, die blockierte Isocyanatgruppen enthalten, die durch die
bei diesem Prüfverfahren benutzten Reagenzien freigesetzt werden können.
Adhésifs - Détermination de la teneur en isocyanate
La présente Norme européenne spécifie une méthode permettant de déterminer la teneur en isocyanate des
adhésifs, des composants d’adhésifs et de leurs constituants de base.
Elle ne s’applique pas aux produits contenant des groupes d’isocyanates bloqués qui peuvent être libérés par
les réactifs utilisés dans cette méthode d’essai.
Lepila – Določevanje izocianatov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2006
1DGRPHãþD
SIST EN 1242:1999
/HSLOD±'RORþHYDQMHL]RFLDQDWRY
Adhesives - Determination of isocyanate content
Klebstoffe - Bestimmung des Isocyanatgehaltes
Adhésifs - Détermination de la teneur en isocyanate
Ta slovenski standard je istoveten z: EN 1242:2005
ICS:
83.180 Lepila Adhesives
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 1242
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 83.180 Supersedes EN 1242:1998
English Version
Adhesives - Determination of isocyanate content
Adhésifs - Détermination de la teneur en isocyanate Klebstoffe - Bestimmung des Isocyanatgehaltes
This European Standard was approved by CEN on 26 September 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1242:2005: E
worldwide for CEN national Members.
Contents page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions.4
4 Principle.4
5 Safety .4
6 Reagents.5
7 Apparatus .5
8 Procedure .6
9 Calculation and expression of the results .7
10 Precision.7
11 Test report .7
Foreword
This European Standard (EN 1242:2005) has been prepared by Technical Committee CEN/TC 193
“Adhesives”, the secretariat of which is held by AENOR.
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 April 2006, and conflicting national standards shall be withdrawn at the
latest by April 2006.
This European Standard supersedes EN 1242:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Scope
This European Standard specifies a method for the determination of the isocyanate content of adhesives,
adhesive components and their basic constituents.
It is not applicable to products containing blocked isocyanate groups which can be liberated by the reagents
used in this test method.
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.
EN 923:2005, Adhesives - Terms and definitions
EN 1067, Adhesives - Examination and preparation of samples for testing
EN ISO 1042, Laboratory glassware - One-mark volumetric flasks (ISO 1042:1998)
EN ISO 15605, Adhesives - Sampling (ISO 15605:2000)
ISO 385, Laboratory glassware - Burettes
ISO 648, Laboratory glassware - One-mark pipettes
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 923:2005 and the following
apply.
3.1
isocyanate content
percentage (mass/mass) of isocyanate groups (-NCO) in the product under test
4 Principle
A weighed quantity of product is converted in presence of an excess of dibutyl amine dissolved in toluene or
another solvent forming urethanes. The unreacted dibutyl amine is backtitrated with hydrochloric acid, in the
presence of a colour indicator or potentiometrically.
5 Safety
Persons using this standard s
...
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