EN ISO 3251:2019

Paints, varnishes and plastics - Determination of non-volatile-matter content (ISO 3251:2019)

Publication date:   Sep 19, 2019

General information

60.60 Standard published   Jun 12, 2019

CEN

CEN/TC 139 Paints and varnishes

European Norm

83.080.01   Plastics in general | 87.040   Paints and varnishes | 87.060.20   Binders

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Scope

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.

Life cycle

PREVIOUSLY

Replaces
EN ISO 3251:2008

NOW

PUBLISHED
EN ISO 3251:2019
60.60 Standard published
Jun 12, 2019