Plastics -- Aromatic isocyanates for use in the production of polyurethanes -- Determination of the isomer ratio in toluenediisocyanate (TDI)

ISO 15064:2017 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 absorption bands arising from out-of-plane C−H deformation vibrations of the aromatic ring at 810 cm−1 and 782 cm−1 (12,3 μm and 13,8 μm).

Plastiques -- Isocyanates aromatiques pour utilisation dans la production de polyuréthannes -- Détermination du rapport des isomères dans le diisocyanate de toluène (TDI)

General Information

Status
Published
Publication Date
29-Jun-2017
Current Stage
6060 - International Standard published
Start Date
26-May-2017
Completion Date
30-Jun-2017
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ISO 15064:2017 - Plastics -- Aromatic isocyanates for use in the production of polyurethanes -- Determination of the isomer ratio in toluenediisocyanate (TDI)
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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 15064:2017(E)
ISO 2017
---------------------- Page: 1 ----------------------
ISO 15064:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

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ii © ISO 2017 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 15064:2017(E)
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

© ISO 2017 – All rights reserved iii
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ISO 15064:2017(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.

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO’s adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

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
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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

absorption bands arising from out-of-plane C−H deformation vibrations of the aromatic ring at 810 cm

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
© ISO 2017 – All rights reserved 1
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ISO 15064:2017(E)
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
...

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