標(biāo)準(zhǔn)號：ANSI/ASTM D5629-1999
中文標(biāo)準(zhǔn)名稱：聚氨基甲酸乙酯原材料試驗方法:低酸性芳族異氰酸鹽酯和聚氨基甲酸乙酯預(yù)聚物酸度的測定
英文標(biāo)準(zhǔn)名稱：Test Method for Polyurethane Raw Materials: Determination of Acidity in Low Acidity Aromatic Isocyanates and Polyurethane Prepolymers (08.03)
標(biāo)準(zhǔn)類型：G31
發(fā)布日期：1999/12/31 12:00:00
實施日期：2000/1/18 12:00:00
中國標(biāo)準(zhǔn)分類號：G31
國際標(biāo)準(zhǔn)分類號：83.080.10
適用范圍： This test method measures the acidity, expressed as ppm of hydrochloric acid (HCl), in aromatic isocyanate or polyurethane prepolymer samples of below 100 ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-(4-phenylisocyanate) (see Note 0). Refer to Test Method D 6099 for determination of acidity in moderate- to high-acidity aromatic isocyanates.ISO 14898, Method B is technically equivalent to this test method. The values stated in SI units are to be regarded as the standard. 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.