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Homepage>BS Standards>87 PAINT AND COLOUR INDUSTRIES>87.060 Paint ingredients>87.060.20 Binders>BS EN ISO 3681:2018 Binders for paints and varnishes. Determination of saponification value. Titrimetric method
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immediate downloadReleased: 2018-12-19
BS EN ISO 3681:2018 Binders for paints and varnishes. Determination of saponification value. Titrimetric method

BS EN ISO 3681:2018

Binders for paints and varnishes. Determination of saponification value. Titrimetric method

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Standard number:BS EN ISO 3681:2018
Pages:14
Released:2018-12-19
ISBN:978 0 580 52123 2
Status:Standard
DESCRIPTION

BS EN ISO 3681:2018


This standard BS EN ISO 3681:2018 Binders for paints and varnishes. Determination of saponification value. Titrimetric method is classified in these ICS categories:
  • 87.060.20 Binders

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.