ISO 4629-1:2016规定了用于测定粘合剂中游离羟基和用于油漆和清漆的粘合剂溶液的滴定法。羟基可以以多元醇，偏酯，聚酯端基或羟基化脂肪酸的形式存在。 该方法不适用于含有羟基和环氧基的树脂，因为后者也将包括在结果中。该方法也不适用于硝酸纤维素或酚醛树脂。 注1:如果在粘合剂溶液的情况下，仅测定粘合剂的羟基值，则必须考虑粘合剂溶液的其它组分可能含有羟基的可能性。 注2:ISO 7142 [1]中规定了环氧树脂羟值的测定方法

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].