DIN EN ISO 14896-2009 塑料.聚氨酯原材料.异氰酸酯的测定(ISO 14896:2009),DIN EN ISO 14896:2009-07 英文版本

标准号：DIN EN ISO 14896-2009
中文标准名称：塑料.聚氨酯原材料.异氰酸酯的测定(ISO 14896:2009),DIN EN ISO 14896:2009-07 英文版本
英文标准名称：Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896:2009); English version of DIN EN ISO 14896:2009-07
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
引用标准：ISO 385;ISO 648;ISO 3696;ISO 4787;ISO 4788;ISO 6353-1;ISO 6353-2;ISO 6353-3;ISO 14898-1999
适用范围：This International Standard specifies two methods for the measurement of the isocyanate content of aromaticisocyanates used as polyurethane raw materials. Method A is primarily applicable to refined toluenediisocyanate (TDI), methylene-bis-(4-phenylisocyanate) (MDI) and their prepolymers. Method B is applicableto 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 notapplicable to blocked isocyanates.