This International Standard specifies two methods for the measurement of the isocyanate content of aromatic iso-cyanates used as polyurethane raw materials. Method A is primarily applicable to refined toluene diisocyanate (TDI), methylene-bis-(4-phenylisocyanate) (MDI) and their prepolymers. Method B is applicable to refined, crude or modi-fied isocyanates derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate) and polymethylene polyphenylisocyanate. It can also be used for isomer mixtures of toluene diisocyanate, methylene-bis-(4-phenyl-isocyanate) and polymethylene polyphenylisocyanate. Other aromatic isocyanates may be analysed by this method if precautions are taken to verify suitability. It is not applicable to blocked isocyanates.
ISO 14896:2000 history
2009ISO 14896:2009 Plastics - Polyurethane raw materials - Determination of isocyanate content
2007ISO 14896:2006/Amd 1:2007 Plastics - Polyurethane raw materials - Determination of isocyanate content; Amendment 1: Acceptable variations in the procedure for method B
2006ISO 14896:2006 Plastics - Polyurethane raw materials - Determination of isocyanate content
2005ISO 14896:2000/Cor 1:2005 Plastics - Polyurethane raw materials - Determination of isocyanate content; Technical Corrigendum 1
2000ISO 14896:2000 Plastics - Polyurethane raw materials - Determination of isocyanate content