DIN EN ISO 3681:2007
涂料和清漆的粘合剂.皂化值的测定.滴定法
Binders for paints and varnishes - Determination of saponification value - Titrimetric method (ISO 3681:1996); English version of DIN EN ISO 3681:2007-10
- 标准号
- DIN EN ISO 3681:2007
- 发布
- 2007年
- 发布单位
- 德国标准化学会
- 替代标准
- DIN EN ISO 3681 Berichtigung 1:2008
- 当前最新
- DIN EN ISO 3681:2019
- 引用标准
- ISO 3696:1987 ISO 385-1:1984 ISO 648:1977 ISO 842:1984
- 被代替标准
- DIN EN ISO 3681:1998
- 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.