ISO-4629-1 › Binders for paints and varnishes - Determination of hydroxyl value - Part 1: Titrimetric method without using a catalyst

ISO-4629-1 - 1ST EDITION - CURRENT


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ISO 4629-1:2016 specifies a titrimetric method for determining the free hydroxyl groups in binders and binder solutions for paints and varnishes. The hydroxyl groups may be present as polyhydric alcohols, partial esters, polyester end groups or hydroxylated fatty acids.

This method is not applicable to resins containing both hydroxyl groups and epoxy groups, because the latter will also be included in the result. Also the method is not applicable to cellulose nitrate or to phenolic resins.

NOTE 1 If, in the case of binder solutions, the hydroxyl value of the binder only is to be determined, the possibility that other constituents of the binder solution may contain hydroxyl groups has to be taken into account.

NOTE 2 A method for the determination of the hydroxyl value of epoxy resins is specified in ISO 7142[1].

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Document Number

ISO 4629-1:2016

Revision Level

1ST EDITION

Status

Current

Publication Date

June 1, 2016

Committee Number

ISO/TC 35/SC 10