ISO 3681:1996 PDF

Scope: This standard specifies the procedure for determining the amount of esterified acid (including the content of free acids and anhydrides in the paint base) in bases for paints and varnishes by titration. Due to the different saponification resistance of different paint bases, this standard has limitations in applicability. If necessary, the experiment can be repeated under more severe conditions to test the complete saponification value, such as extending the saponification time, increasing the concentration of potassium hydroxide solution, or using an alcohol with a higher boiling point as the solvent. This standard does not apply to paint bases that may further react with alkali beyond normal saponification. Appendix A specifies the method for determining the saponification value of paint bases that are difficult to saponify.

ISO 3681:1996 history

2018 ISO 3681:2018 Binders for paints and varnishes — Determination of saponification value — Titrimetric method
1996 ISO 3681:1996 Binders for paints and varnishes - Determination of saponification value - Titrimetric method
1983 ISO 3681:1983 Binders for paints and varnishes; Determination of saponification value; Titrimetric method
1976 ISO 3681:1976 Title missing - Legacy paper document