ISO 9514:2019 pdf download

ISO 9514:2019 pdf download.Paints and varnishes — Determination of the pot life of multicomponent coating systems — Preparation and conditioning of samples and guidelines for testing
1 Scope
This document specifies a method, carried out under standard conditions, for preparing and storing a sample of a multicomponent coating system and subsequently assessing its pot-life by measuring a particular property/ies. Reactive systems curing within a short period of time, e.g. 3 h, will have the end of their pot life so near to the gel point that they will need to be tested for that particular property in accordance with ISO 2535. The method can be carried out either as a pass/fail test by determining the particular property/ies after a specified period of time, or as determination of the pot life by repeating determinations at convenient intervals of time. This document is not intended for in situ control of products during their application. It is intended to determine “pot life” in the laboratory. The value obtained from this test method can be subject to modification by suppliers for practical reasons (e.g. starting temperature) when giving advice to users and should then be called the “practical pot life”.
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 2535, Plastics — Unsaturated-polyester resins — Measurement of gel time at ambient temperature
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and 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/
7 Procedure
Carry out the test in duplicate. Condition the components of the liquid system separately in accordance with ISO 3270. After conditioning at the specified temperature, the difference in temperature between the components shall not be greater than 1 °C. Note the time, and mix the components in accordance with the instructions given for the particular system and to give a convenient quantity of blend for testing. Report the proportions of the components in the mixture. Put (300 ± 3) ml of the blend into a container. Close the container, if applicable, and put it into the conditioning chamber. If application properties are to be assessed, it is necessary to prepare a volume of blend approximately equal to the volume in which the paint will be supplied for use. Annex A gives guidance on the properties that can be measured.