ISO 15064:2017

INTERNATIONAL ISO
STANDARD 15064
Third edition
2017-06
Plastics — Aromatic isocyanates for
use in the production of polyurethanes
— Determination of the isomer ratio
in toluenediisocyanate (TDI)
Plastiques — Isocyanates aromatiques pour utilisation dans la
production de polyuréthannes — Détermination du rapport des
isomères dans le diisocyanate de toluène (TDI)
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Sampling . 2
5 Principle . 2
5.1 Method A . 2
5.2 Method B . 2
6 Reagents . 2
7 Apparatus . 3
8 Test conditions . 3
9 Method A — Samples containing between 5 % and 95 % of 2,6-TDI .3
9.1 Calibration . 3
9.2 Procedure . 5
9.3 Expression of results . 5
9.4 Precision and bias . 5
9.4.1 Precision. 5
9.4.2 Bias . 5
9.5 Test report . 6
10 Method B — Samples containing 0 % to 5 % of 2,6-TDI . 6
10.1 Calibration . 6
10.2 Procedure . 6
10.3 Expression of results . 6
10.4 Precision and bias . 7
10.4.1 Precision. 7
10.4.2 Bias . 7
10.5 Test report . 7
Annex A (normative) Calibration curves . 8
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
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12,
Thermosetting materials.
This third edition cancels and replaces the second edition (ISO 15064:2010), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— a NOTE has been added to 6.2;
— the testing temperature has been added in Clause 8.
iv © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 15064:2017(E)
Plastics — Aromatic isocyanates for use in the production
of polyurethanes — Determination of the isomer ratio in
toluenediisocyanate (TDI)
WARNING — Persons using this document should be familiar with normal laboratory practice.
This document does not purport to address all of the safety problems, if any, associated with
its use. It is the responsibility of the user of this document to establish appropriate safety and
health practices and to ensure compliance with any national regulatory conditions prior to use.
1 Scope
This document specifies methods for the measurement of toluene-2,6-diisocyanate in mixtures of the
2,4- and 2,6-isomers. Two methods based on infrared spectroscopy are used to give accurate results
over a broad range of isomer concentrations. Method A is applicable to toluenediisocyanate (TDI)
samples containing between 5 % and 95 % of the 2,6-isomer. Method B is applicable to TDI samples
containing 0 % to 5 % of the 2,6-isomer. Both methods are based on the quantitative measurement of
−1
absorption bands arising from out-of-plane C−H deformation vibrations of the aromatic ring at 810 cm
−1
and 782 cm (12,3 μm and 13,8 μm).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 648, Laboratory glassware — Single-volume pipettes
ISO 4787, Laboratory glassware — Volumetric instruments — Methods for testing of capacity and for use
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
isomer
compound having the same percentage composition and molecular mass as another compound, but
differing in chemical structure and properties
3.2
isomer content
amount of an isomer (3.1) expressed as a mass percentage of the total isomer amount
3.3
polyurethane
polymer prepared by the reaction of an organic di- or polyisocyanate with compounds containing two
or more hydroxyl groups
4 Sampling
Since organic isocyanates react with atmospheric moisture, take special precautions in sampling. Usual
sampling methods (for example, sampling an open drum with a thief), even when conducted rapidly,
can cause contamination of the sample with insoluble ureas; therefore, blanket
...