Reference number
ISO 14898:1999
© ISO 2025
International Standard
ISO 14898:1999
Plastics — Aromatic isocyanates for use in the production of polyurethane — Determination of acidity
Edition 1
1999-10
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Published (Edition 1, 1999)
This publication was last reviewed and confirmed in 2020. Therefore this version remains current.

ISO 14898:1999

Language
Format
CHF 65
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Abstract

This International Standard specifies methods for the measurement of the acidity of aromatic isocyanates and

prepolymers used as polyurethane raw materials. Method A is a straightforward titration without a blank and is

primarily applicable to products derived from crude or modified methylene-bis-(4-phenylisocyanate), polymethylene

polyphenylisocyanates and toluene diisocyanate having moderate to high (> 100 mg/g ) levels of acidity. Method B is

applicable to refined, crude or modified isocyanates derived from methylene-bis-(4-phenylisocyanate), polymethylene

polyphenylisocyanate and toluene diisocyanate having low (< 100 mg/g ) levels of acidity, and a blank is employed.

These methods can also be used for isomeric mixtures of toluene diisocyanate, methylene-bis-(4-phenylisocyanate)

and polymethylene polyphenylisocyanate. Other aromatic isocyanates may be analysed by this method if

precautions are taken to verify suitability.

General information

  • Status
     : Published
    Publication date
     : 1999-10
    Stage
    : International Standard under systematic review [90.20]
  • Edition
     : 1
    Number of pages
     : 7
  • Technical Committee :
    ISO/TC 61/SC 12
    ICS :
    83.080.10 
  • RSS updates

 Amendments

Amendments are issued when it is found that new material may need to be added to an existing standardization document. They may also include editorial or technical corrections to be applied to the existing document.

Amendment 1

Edition 2011

Language
Format
CHF 18
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Life cycle

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