標準號：ANSI/ASTM D4659-1998
中文標準名稱：聚氨酯原材料試驗方法.異氰酸酯比重的測定
英文標準名稱：Polyurethane-Isocyanate Raw Materials, Determination of Specific Gravity, Method for Testing (11.01)
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1999/2/10 12:00:00
中國標準分類號：G31
國際標準分類號：83.040.30;83.080.20
適用范圍： These test methods determine the specific gravity of toluenediiosocyanate and crude methylene-bis-(4-phenylisocyanate). These test methods also are applicable to many other liquids. (See Note 1.) Test Method A Specific gravity by pycnometer, for high-accuracy determination. Test Method B Specific gravity by hydrometer, for a less accurate, but rapid, determination. The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only. 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 Notes 2 and 3. Note 1 -There is no equivalent ISO standard.