标准编号：ISO 3681:2018
中文名称：色漆和清漆用粘合剂 皂化值的测定 滴定法
英文名称：Binders for paints and varnishes — Determination of saponification value — Titrimetric method
发布日期：2018-11
标准范围
This document specifies a titrimetric method 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 document is of limited applicability. If necessary, completeness of saponification can 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.
The method is not applicable to those materials that show further reaction with alkalis beyond normal saponification.
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