International Standard
ISO 3251:2019
Paints, varnishes and plastics — Determination of non-volatile-matter content
Reference number
ISO 3251:2019
Edición 5
2019-05
International Standard
Vista previa
ISO 3251:2019
73848
No disponible en español
Publicado (Edición 5, 2019)

ISO 3251:2019

ISO 3251:2019
73848
Idioma
Formato
CHF 63
Convertir Franco suizo (CHF) a tu moneda

Resumen

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.

Informaciones generales

  •  : Publicado
     : 2019-05
    : Norma Internacional en proceso de revisión sistemática [90.20]
  •  : 5
     : 8
  • ISO/TC 35/SC 9
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