GB/T 31416-2015: Paints and varnishes -- Determination of the pot-life of multicomponent coating systems -- Preparation and conditioning of samples and guidelines for testing

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Scope

This Standard describes 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.
Special “low temperature” grade systems will need to be tested at a lower
specified temperature to reflect the conditions under which they will be used in
practice. Additionally, it can be a requirement to determine pot life at a specified
temperature or temperatures in order to cover a range of practical conditions
under which a paint will be used.
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 Standard is not intended for in situ control of products during their
application. It is intended to determine “pot life” in the laboratory.
NOTE 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”.

Basic Data

Standard ID	GB/T 31416-2015 (GB/T31416-2015)
Description (Translated English)	Paints and varnishes -- Determination of the pot-life of multicomponent coating systems -- Preparation and conditioning of samples and guidelines for testing
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.040
Word Count Estimation	9,964
Date of Issue	2015-05-15
Date of Implementation	2015-10-01
Quoted Standard	ISO 1513; ISO 3270; ISO 15528
Adopted Standard	ISO 9514-2005, IDT
Regulation (derived from)	National Standard Announcement 2015 No. 15
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the method for preparing and storing multi-component coating system samples under standard conditions, and by then measuring certain properties of the sample was evaluated applicable. If the curing time is very short reaction system (eg 3h), which is very close to the end of the applicable gelling point, the determination of some special properties can be found in ISO 2535. Special "low" level response of the break, you need to be tested at a lower provision reflects the actual usage of the reaction temperature.