ANSI/ASTM D4663-1998 聚氨酯异氰酸盐原料试验方法.水解氯的测定(08.03)

标准号：ANSI/ASTM D4663-1998
中文标准名称：聚氨酯异氰酸盐原料试验方法.水解氯的测定(08.03)
英文标准名称：Polyurethane-Isocyanate Raw Materials, Determination of Hydrolyzable Chlorine, Method for Testing (08.03)
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1998/10/13 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.10
适用范围：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.