ISO 14900:2017
(Main)Plastics — Polyols for use in the production of polyurethane — Determination of hydroxyl number
Plastics — Polyols for use in the production of polyurethane — Determination of hydroxyl number
ISO 14900:2017 specifies two methods for the measurement of the hydroxyl number of polyols used as polyurethane raw materials. It is necessary to know the hydroxyl content of polyols to properly formulate polyurethane systems. Method A is primarily applicable to readily esterified polyether polyols. It is also intended for polyols which have significant steric hindrance, such as those based on sugars. Method B is intended for polyether polyols, polymer polyols and amine-initiated polyols, but may give low results for sterically hindered polyols. Other polyols can be analysed by these methods if precautions are taken to verify applicability. These methods can be used for research and for quality control and specification purposes.
Plastiques — Polyols pour la production du polyuréthanne — Détermination de l'indice d'hydroxyle
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 14900
Second edition
2017-03
Plastics — Polyols for use in the
production of polyurethane —
Determination of hydroxyl number
Plastiques — Polyols pour la production du polyuréthanne —
Détermination de l’indice d’hydroxyle
Reference number
ISO 14900:2017(E)
©
ISO 2017
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ISO 14900:2017(E)
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ii © ISO 2017 – All rights reserved
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ISO 14900:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Interferences . 2
6 Reagents . 2
7 Apparatus . 4
8 Method A — Acetylation . 5
8.1 Procedure . 5
8.2 Expression of results . 7
8.3 Precision and bias . 7
8.4 Test report . 8
9 Method B — Phthalation . 8
9.1 Procedure . 8
9.2 Expression of results . 9
9.3 Precision and bias .
...
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