ISO 22516 pdf download Paints and varnishes — Practical determination of non-volatile and volatile matter content during application
This document specifies a test method for the determination of non-volatile matter of coatings directlyafter application or after intermediate or final drying.In practice, the determination of volatile matteris applied particularly in regard to water-thinnable coatings which are re-coated with an additionalcoating material.
Furthermore, the method can be used to compare the efficiency of different application and dryingmethods.
The content of non-volatile or volatile matter of a product after application is no absolute variable butdepends on the application and drying conditions applied during the test. Consequently, applying thismethod gives only relative values and not the real values for the content of non-volatile matter, due tosolvent retention, thermal decomposition and evaporation of low-molecular contents.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.Forundated 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
3Terms and definitions
For the purposes of this document, the terms and definitions given in IS0 4618 and the following apply.ISo and lEC 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/
operations and time periods,which have to be successive in regard to the coating method in order toresult in a given coating system.
Note 1 to entry: Depending on the focus several successive operations can be subsumed as one process step.3.2
non-volatile matter after defined process stepNVp
residue by mass obtained after the application from the single process steps of examination underspecified conditions of test
loss by mass obtained by evaporation under specified conditions of test3.4
volatile matter after defined process stepVMp
loss by mass obtained after the application from the single process steps of examination underspecifiedconditions of test
An aluminium foil or a test panel in production or in laboratory spray booth is coated in accordance withthe specified conditions.The coated aluminium foil or test panel is carefully folded down the centre andweighed after the process step of examination and then unfolded. Subsequently, the aluminium foil isdried in horizontal position in a laboratory drying box in accordance with the agreed drying conditionsand weighed afterwards.The content of non-volatile or volatile matter is calculated from the difference.
5 Apparatus and materials
Ordinary laboratory apparatus, together with the following:
Coating unit and, if necessary, conveying drier for the process step of examination.
5.2Laboratory drying box, capable of maintaining the specified or agreed test temperature to t2°C(for temperatures up to 150 °C) or ±3,5 °C(for temperatures above 150 °Cand up to 200 C).A laboratorydrying box with technical ventilation shall be used.
WARNING — Due to explosion and fire control, careful handling is indispensable for productscontaining flammable volatile constituents.
5.3 Method A with aluminium foil
5.3.1 Aluminium foil, soft quality with a thickness of (30±2) um, cut to the format of90 mm × 130 mmor as agreed.
5.3.2 Magnetic fixture frame to secure the foils on the object to be coated matching the measures ofthe foil piece (e.g. outside: 110 mm × 150 mm, inside: 60 mm x 100 mm).
NOTE PVC/polyvinylidene chloride coated fixture frames have been found suitable.
5.3.3 Appropriate tape to secure the fixture frames on non-magnetic substrate.
5.3.4 Precision balance, weighing to 0,1 mg.
5.4Method B with test panel
5.4.1 Test panel measuring approximately 200 mm × 100 mm and of a thickness of 0,7 mm to 1,0 mmand shall be prepared, coated,and dried/cured in accordance with ISO 1514.