ISO 14896:2009 塑料 聚氨酯原材料 异氰酸酯含量的测定

标准编号：ISO 14896:2009

中文名称：塑料 聚氨酯原材料 异氰酸酯含量的测定

英文名称：Plastics — Polyurethane raw materials — Determination of isocyanate content

发布日期：2009-02

标准范围

ISO 14896:2009规定了两种测量用作聚氨酯原料的芳香族异氰酸酯中异氰酸酯含量的方法。方法A主要适用于精制甲苯二异氰酸酯（TDI）、亚甲基双-（4-苯基异氰酸酯）（MDI）及其预聚物。方法B适用于从甲苯二异氰酸酯、亚甲基双-（4-苯基异氰酸酯）和聚亚甲基聚苯异氰酸酯衍生的精制、粗加工或改性异氰酸酯。它也可用于甲苯二异氰酸酯、亚甲基双-（4-苯基异氰酸酯）和聚亚甲基聚苯异氰酸酯的异构体混合物。如果采取预防措施以验证适用性，则可使用该方法分析其他芳香族异氰酸酯。它不适用于封闭异氰酸酯。

ISO 14896:2009 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.

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