ISO 14898:1999
Current
The latest, up-to-date edition.
Plastics Aromatic isocyanates for use in the production of polyurethane Determination of acidity
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07-10-1999
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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.
| DocumentType |
Standard
|
| Pages |
8
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| SAC GB/T 12009.5 : 1992 | Identical |
| NEN ISO 14898 : 1999 AMD 1 2011 | Identical |
| BS ISO 14898 : 1999 | Identical |
| UNE 53984-1:2003 | Identical |
| BS EN ISO 14896:2009 | Plastics. Polyurethane raw materials. Determination of isocyanate content |
| DIN EN ISO 14896:2009-07 | PLASTICS - POLYURETHANE RAW MATERIALS - DETERMINATION OF ISOCYANATE CONTENT |
| ISO 14896:2009 | Plastics — Polyurethane raw materials — Determination of isocyanate content |
| I.S. EN ISO 14896:2009 | PLASTICS - POLYURETHANE RAW MATERIALS - DETERMINATION OF ISOCYANATE CONTENT |
| UNI EN ISO 14896 : 2009 | PLASTICS - POLYURETHANE RAW MATERIALS - DETERMINATION OF ISOCYANATE CONTENT |
| ASTM D 5629 : 2016 : REDLINE | Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers |
| EN ISO 14896:2009 | Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896:2009) |
| ASTM D 5629 : 2016 : REDLINE | Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers |
| ISO 4787:2010 | Laboratory glassware Volumetric instruments Methods for testing of capacity and for use |
| ISO 6353-1:1982 | Reagents for chemical analysis — Part 1: General test methods |
| ISO 648:2008 | Laboratory glassware — Single-volume pipettes |
| ISO 4788:2005 | Laboratory glassware — Graduated measuring cylinders |
| ISO 6353-3:1987 | Reagents for chemical analysis — Part 3: Specifications — Second series |
| ISO 3696:1987 | Water for analytical laboratory use — Specification and test methods |
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