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.
ANSI/ASTM D5629-1999由美国国家标准学会 US-ANSI 发布于 1999,并于 2000-01-18 实施。
ANSI/ASTM D5629-1999 在中国标准分类中归属于: G31 合成树脂、塑料基础标准与通用方法,在国际标准分类中归属于: 83.080.10 热固性塑料。
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