標準號：ANSI/ASTM D4663-1998
中文標準名稱：聚氨酯異氰酸鹽原料試驗方法.水解氯的測定(08.03)
英文標準名稱：Polyurethane-Isocyanate Raw Materials, Determination of Hydrolyzable Chlorine, Method for Testing (08.03)
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1998/10/13 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.10
適用范圍：This test method determines the hydrolyzable chlorine content of toluene-2, 4-diisocyanate, toluene-2, 6-diisocyanate, or mixtures of the two. This test method may also be applied to other isocyanates of suitable solubility. (See Note 0.) The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. (See Note 2.) 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. Note 1This test method may be applicable with crude polymeric isocyanates. However, the precision with crude polymeric isocyanates has not been established. Note 2There is no equivalent ISO standard.