EN ISO 3681:2018

Binders for paints and varnishes - Determination of saponification value - Titrimetric method (ISO 3681:2018)

Publication date:   Mar 14, 2019

General information

60.60 Standard published   Dec 12, 2018

CEN

CEN/TC 139 Paints and varnishes

European Norm

87.060.20   Binders

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Scope

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.

Life cycle

PREVIOUSLY

Replaces
EN ISO 3681:1998

NOW

PUBLISHED
EN ISO 3681:2018
60.60 Standard published
Dec 12, 2018