ANSI/ASTM D5155-2001 聚氨酯原料试验方法:芳香类异氰酸盐中异氰酸含量的测定

标准号：ANSI/ASTM D5155-2001
中文标准名称：聚氨酯原料试验方法:芳香类异氰酸盐中异氰酸含量的测定
英文标准名称：Test Method for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic Isocyanates (08.03)
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：2001/11/10 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围：These test methods measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials. Test Method A -Unheated toluene-dibutylamine determines the amount of toluene diisocyanate in refined toluene-2, 4-diisocyanate and toluene-2, 6-diisocyanate, or mixtures of the two. Other isomers, if present, will be included in the determination. This test method may also be applied to other isocyanates of suitable reactivity and solubility. Test Method B -Heated toluene-dibutylamine determines the amine equivalent of crude or modified isocyanates derived from toluene diisocyanate, methylenebis-(4-phenylisocyanate), and polymethylene polyphenylisocyanate. Test Method C -Unheated trichlorobenzene-toluene-dibutylamine determines the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenylisocyanate. This test method can also be used to assay isomer mixtures of toluene diisocyanate and methylene-bis-(phenylisocyanate). This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning and precautionary statements, see Note 2. Note 1 -Method C of this test method is equivalent to Method B of ISO 14896.