ISO 3251:2008
Paints, varnishes and plastics - Determination of non-volatile-matter content
- Standard No.
- ISO 3251:2008
- Release Date
- 2008
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 3251:2019
- Latest
- ISO 3251:2019
- Scope
- This International Standard 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 and film-forming agents). For the method to be usable for unplasticized polymer dispersions and rubber latices, the non-volatile residue (which consists essentially of the polymeric material and of small quantities of auxiliaries such as emulsifiers, protective colloids, stabilizers, solvents added as film-forming agents and — especially for rubber latex concentrate — preserving agents) has to be chemically stable under the test conditions. For plasticized samples, the residue, by definition, normally includes the plasticizer. 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 latices 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. Some polymer compositions tend to decompose during such treatment and therefore give incorrect results. ISO 3233 and ISO 23811 specify methods for determining the volume of non-volatile matter in paints, varnishes and related products.
ISO 3251:2008 Referenced Document
- ISO 123 Rubber latex - Sampling
- ISO 124 Latex, rubber - Determination of total solids content*， 2014-03-01 Update
- ISO 1513 Paints and varnishes - Examination and preparation of test samples*， 2010-05-01 Update
- ISO 15528 Paints, varnishes and raw materials for paints and varnishes — Sampling*， 2020-05-13 Update
- ISO 2431 Paints and varnishes — Determination of flow time by use of flow cups*， 2019-06-17 Update
ISO 3251:2008 history
- 2019 ISO 3251:2019 Paints, varnishes and plastics — Determination of non-volatile-matter content
- 2008 ISO 3251:2008 Paints, varnishes and plastics - Determination of non-volatile-matter content
- 2003 ISO 3251:2003 Paints, varnishes and plastics - Determination of non-volatile-matter content
- 1993 ISO 3251:1993 Paints and varnishes; determination of non-volatile matter of paints, varnishes and binders for paints and varnishes
- 1974 ISO 3251:1974 Paint media — Determination of volatile and non-volatile matter
