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

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard uses translation method and identically adopts ISO 9514.2005

Paints and varnishes - Determination of the pot life of multicomponent coating

systems - Preparation and conditioning of samples and guidelines for testing.

The Chinese documents which have consistency with the international

normative reference in this Part are as follows.

- GB/T 3186-2006 Paints varnishes and raw materials for paints and

varnishes - Sampling (ISO 15528.2000, IDT);

- GB/T 9278-2008 Temperatures and humidities for conditioning and

testing of paint specimens (ISO 3270.1984, IDT);

- GB/T 20777-2006 Paints and varnishes - Examination and preparation

of samples for testing (ISO 1513.1992, IDT).

This Standard was proposed by China Petroleum and Chemical Industry

Federation.

This Standard shall be under the jurisdiction of National Technical Committee

on Paints and Pigments of Standardization Administration of China (SAC/TC 5).

The drafting organizations of this Standard. CNOOC Changzhou Paint and

Chemicals Research Institute Co., Ltd., Guangzhou Biuged Laboratory

Instrument Things Co. , Ltd., Guangzhou Synthetic Material Research Institute

Co., Ltd., Xinhe New Materials Co., Ltd., Shenzhen Guang Tian Decoration

Group Co., Ltd., Chongqing Three Gorges Paint Co., Ltd., Beijing Bihai Zhou

Corrosion Protection Industry Co., Ltd..

Main drafters of this Standard. Zhou Xiangling, Wang Chongwu, Li Xin, Li

Yuewu, Li Shaoqiang, Wei Xuefeng, Li Yixuan.

Paints and vanishes - Determination of the pot-life of

multicomponent coating systems - Preparation and

conditioning of samples and guidelines for testing

1 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".

2 Normative references

The following referenced documents are indispensable for the application 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 samples

for testing

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