Plastics — Polyols for use in the production of polyurethanes — Determination of basicity

This document specifies a method for the measurement of trace amounts of basic materials present in polyether polyols used in the production of polyurethanes. It is important to know the trace amount of basicity in a polyol to prevent gelation of the reaction mass during the production of polyurethane prepolymers. It is also useful to control the basicity in polyols used for polyurethane production to assure consistent and reproducible reaction behaviour. This method is suitable for quality control, as a specification test and for research. The applicable range is 0 μg to 50 μg/g, expressed as KOH. The method is not applicable to amine-based polyols. The values can be reported as CPR (controlled polymerization rate) units.

Plastiques — Polyols pour la production de polyuréthannes — Détermination de la basicité

General Information

Status
Published
Publication Date
31-May-2022
Current Stage
6060 - International Standard published
Start Date
01-Jun-2022
Due Date
12-Apr-2023
Completion Date
01-Jun-2022
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INTERNATIONAL ISO
STANDARD 14899
Second edition
2022-06
Plastics — Polyols for use in the
production of polyurethanes —
Determination of basicity
Plastiques — Polyols pour la production de polyuréthannes —
Détermination de la basicité
Reference number
ISO 14899:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 14899:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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© ISO 2022 – All rights reserved
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ISO 14899:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Sampling ....................................................................................................................................................................................................................... 2

6 Interferences ............................................................................................................................................................................................................ 2

7 Reagents ........................................................................................................................................................................................................................ 2

8 Apparatus .................................................................................................................................................................................................................... 2

9 Procedure ....................................................................................................................................................................................................................3

10 Expression of results ....................................................................................................................................................................................... 3

11 Precision and bias ..............................................................................................................................................................................................3

11.1 Precision ......... .................................................................................................................................. ............................................................ 3

11.2 Bias .................................................................................................................................................................................................................... 4

12 Test report .................................................................................................................................................................................................................. 4

Bibliography ................................................................................................................................................................................................................................ 5

iii
© ISO 2022 – All rights reserved
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ISO 14899:2022(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

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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 of 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

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12,

Thermosetting materials.

This second edition cancels and replaces the first edition (ISO 14899:2001), of which it constitutes a

minor revision. The changes are as follows:

— the title has been changed to plural form to read: "Plastics — Polyols for use in the production of

polyurethanes — Determination of basicity".

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2022 – All rights reserved
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ISO 14899:2022(E)
Introduction

This method is for the determination of trace amounts of basicity in polyether polyols, which are used

in the preparation of polyurethane prepolymers and polyurethane products. Knowledge of this value

is important to prevent gelation during prepolymer production and to control reaction rates during

polyurethane preparation. The method, known as the controlled polymerization rate (CPR) analysis,

has become an accepted industry practice, a version of which has been published as part of JIS K 1557.

© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 14899:2022(E)
Plastics — Polyols for use in the production of
polyurethanes — Determination of basicity

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

...

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