ASTM D5523-2010 通过单体芳香异氰酸酯中水解性氯的银量 下载
中文名称: 通过单体芳香异氰酸酯中水解性氯的银量测定来测量聚氨酯原料酸度的试验方法
英文名称:Standard Test Method for Polyurethane Raw Materials: Acidity by Argentometric Determination of Hydrolyzable Chlorine in Monomeric,Aromatic Isocyanates
中标分类：G32 ICS分类：83.080.20
标准分类编号：AS 页数：3
发布日期： 实施日期：2010-08-01 作废日期：
被替代标准： 代替标准：ASTM D5523-2004
引用标准：ASTM D883 采用标准：
起草单位： 归口单位：
标引依据：
补充修订：
备注：
范围：1.1 This test method measures the hydrolyzable chlorine content of monomeric, aromatic isocyanates used as polyurethane raw materials and expresses it as HCl acidity. The test method is applicable to toluene diisocyanate (TDI) and monomeric methylene di(phenylisocyanate), known as MDI. The main sources of hydrolyzable chlorine and, therefore, acidity in monomeric aromatic isocyanates are carbamyl chlorides, acid chlorides, and dissolved phosgene. All of these compounds react with alcohols and water to form hydrochloric acid. 1.2 This test method applies only to monomeric isocyanates in which all of the acidity is derived from species that generate HCl on solvolysis. 1.3 The values stated in SI units are to be regarded as the standard. 1.4 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 regula
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