Färgindustrin

Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 14 sep 2018
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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). For the method to be usable for unplasticized polymer dispersions and rubber lattices, 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. Several polymer compositions tend to decompose during such treatment and therefore give incorrect results.

ISO 3233 (all parts) specifies test methods for determining the volume of non-volatile matter in paints, varnishes and related products.

Ämnesområden: Målning; Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 14 sep 2018
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This document describes a number of methods that are applicable to the measurement of the thickness of coatings applied to a substrate. Methods for determining wet-film thickness, dry-film thickness and the film thickness of uncured powder layers are described. Reference is made to individual standards where these exist. Otherwise the method is described in detail.

An overview on the methods is given in Annex A, in which the field of application, existing standards and the precision are specified for the individual methods.

This document also defines terms concerning the determination of film thickness.

NOTE This standard consistently enumerateds the individual coatings applied in a multi-layer system by referring to the first coating applied on the

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: ISO
Svarsdatum: den 12 okt 2018
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This document specifies a test method for the determination of non-volatile matter of coatings directly after application or after the intermediate or final drying. In practice, the determination of volatile matter is applied particularly in regard to water-thinnable coatings which are re-coated with an additional coating material.

When applying coatings the size or the size distribution of the generated drops is of great importance for the application result. By varying the application parameters, such as spraying energy and the rate of flow of the coating material as well as the technical properties such as solvent composition and rheological flow performance, the quality of the application result can be controlled. Also, climatic conditions during the application (e.g. temperature, relative humidity, and air falling speed) highly influence the result. By determining the non-volatile matter after the application or after the intermediate or final drying it is possible to characterize the wet or dry application result and, consequently, to indirectly refer to the generated drop size distribution and the solvent emission during the application. By means of the calculated volatile matter the sufficient intermediate drying of the respective coating is being determined before applying an additional coating. Furthermore, the method is appropriate to compare the efficiency of different application and drying methods.

NOTE The content of non-volatile or volatile matter of a product after application is no absolute variable but depends on the application and drying conditions applied during the test. Consequently, applying this method gives only relative values and not the real values for the content of non-volatile matter, due to solvent retention, thermal decomposition and evaporation of low-molecular contents.