ISO 22516:2019 pdf download

ISO 22516:2019 pdf download.Paints and varnishes — Practical determination of non- volatile and volatile matter content during application
1 Scope
This document specifies a test method for the determination of non-volatile matter of coatings directly after application or after 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. Furthermore, the method can be used to compare the efficiency of different application and drying methods. 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 4618, Paints and varnishes — Terms and definitions
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Principle
An aluminium foil or a test panel in production or in laboratory spray booth is coated in accordance with the specified conditions. The coated aluminium foil or test panel is carefully folded down the centre and weighed after the process step of examination and then unfolded. Subsequently, the aluminium foil is dried in horizontal position in a laboratory drying box in accordance with the agreed drying conditions and weighed afterwards. The content of non-volatile or volatile matter is calculated from the difference.
7.1 General
The determination of non-volatile and volatile matter can be carried out directly on the coating object during the coating process in production or in the laboratory spray booth. Method A is appropriate for both coating locations, whereas method B should be restricted to the application in the laboratory spray booth. Only for the procedure of handling method A, a contamination of the recently applied coatings can be avoided.