DIN EN ISO 3681-2007 涂料和清漆的粘合剂.皂化值的测定.滴定法

标准号：DIN EN ISO 3681-2007
中文标准名称：涂料和清漆的粘合剂.皂化值的测定.滴定法
英文标准名称：Binders for paints and varnishes - Determination of saponification value - Titrimetric method (ISO 3681:1996); English version of DIN EN ISO 3681:2007-10
标准类型：G52
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G52
国际标准分类号：87.060.20
引用标准：ISO 385-1-1984;ISO 648-1977;ISO 842-1984;ISO 3696-1987
适用范围：This international Standard specifies a titrimetric metohd for determining the esterified-acid content in binders for paints and varnishes,free acids and acid anhydrides being necessarily included in the result obtained.Because different binders vary in their resistance to saponification,this international Standard is of limited applicability.If necessary,completeness of saponification may be checked by repeating the test under more severe conditions achieved by the use of longer saponification time,more concentrated potassium hydroxide solution,or a higher-boiling alcohol as solvent.Annex A specifies a procedure suitable for binders that saponify with difficulty.Themethod is not applicable to those materials that show further reaction with alkalis beyond normal saponification.