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Normas DIN – AENOR
DIN EN ISO 14896:2008-08

DIN EN ISO 14896:2008-08

Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO/FDIS 14896:2008); German version FprEN ISO 14896:2008 / Note: Date of issue 2008-10-20

Plastiques - Matières premières des polyuréthannes - Détermination de la teneur en isocyanate (ISO/FDIS 14896:2008); Version allemande FprEN ISO 14896:2008 / Attention: Date de parution 2008-10-20

Kunststoffe - Polyurethanrohstoffe - Bestimmung des Isocyanatanteils (ISO/FDIS 14896:2008); Deutsche Fassung FprEN ISO 14896:2008 / Achtung: Erscheinungsdatum 2008-10-20

Fecha Anulación:
2019-07 /Withdrawn
Equivalencias internacionales:

ISO/FDIS 14896 (2008-09)

prEN ISO 14896 (2008-09)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 14896:2009-07

Resumen:
This standard specifies two methods for the measurement of the isocyanate content of aromatic isocyanates 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 modified 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-phenylisocyanate) 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.
Keywords:
Base materials, Basic materials, Chemical analysis and testing, Concentration, Definitions, Determination of content, Isocyanates, Mathematical calculations, Measurement, Methods of analysis, Plastics, Polyurethane, Raw materials, Reagents, Test report
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