Reference number
ISO 14898:1999
International Standard
ISO 14898:1999
Plastics — Aromatic isocyanates for use in the production of polyurethane — Determination of acidity
Edition 1
1999-10
Read sample
ISO 14898:1999
25886
Published (Edition 1, 1999)
This publication was last reviewed and confirmed in 2020. Therefore this version remains current.
This standard has 1 amendment.

ISO 14898:1999

ISO 14898:1999
25886
Language
Format
CHF 63
Convert Swiss francs (CHF) to your currency

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

  •  : Published
     : 1999-10
    : International Standard confirmed [90.93]
  •  : 1
     : 7
  • ISO/TC 61/SC 12
    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

ISO 14898:1999/Amd 1:2011
55454
Language
Format
CHF 18
Convert Swiss francs (CHF) to your currency

Life cycle

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