This document specifies a method for determining the non-volatile-matter content by mass of paints, varnishes, binders for paints and varnishes, polymer dispersions and condensation resins such as phenolic resins (resols, novolak solutions etc.). The method is also applicable to formulated dispersions containing fillers, pigments and other auxiliaries (e.g. thickeners, film-forming agents). NOTE 1 The non-volatile-matter content of a product is not an absolute quantity but depends upon the temperature and period of heating used for the determination. Consequently, when using this method, only relative and not true values for non-volatile-matter content are obtained owing to solvent retention, thermal decomposition and evaporation of low molecular mass constituents. The method is therefore primarily intended for testing different batches of the same type of product. NOTE 2 This method is suitable for synthetic rubber lattices, provided heating for a specific period of time is considered appropriate (ISO 124 specifies heating until the loss in mass of a 2 g test portion following successive periods of heating is less than 0,5 mg). NOTE 3 In-house methods for determining non-volatile matter often include drying with infrared or microwave radiation. Standardization of such methods is not possible, since they are not generally applicable. Several polymer compositions tend to decompose during such treatment and therefore give incorrect results.
EN ISO 3251:2019 history
2019EN ISO 3251:2019 Paints, varnishes and plastics - Determination of non-volatile-matter content (ISO 3251:2019)
2008EN ISO 3251:2008 Paints, varnishes and plastics - Determination of non-volatile-matter content (ISO 3251:2008)
2003EN ISO 3251:2003 Paints, varnishes and plastics - Determination of non-volatilematter content ISO 3251: 2003
1995EN ISO 3251:1995 Paints and Varnishes - Determination of Non- Volatile Matter of Paints, Varnishes and Binders for Paints and Varnishes (ISO 3251 : 1993)