GB/T 9268-2008Determination of freeze-thaw resistance of latex and emulsion paints (English PDF)

Foreword

The standard method B corresponds to the standard American Society for Testing and Materials ASTMD2243:1995 (2003) "Standard Test Method for Water Freeze-thaw durability of the paint, "and ASTMD2243. Consistency level 1995 (2003) is not equivalent.

This standard replaces GB/T 9268-1988 "Determination of freeze-thaw durability of latex paint." The previous version of Standard GB/T 9268-1988 main technical differences are as follows.

--- Increased A method, which is a method of measuring the general paint industry is resistant to freezing and thawing;

--- The 1988 version of the standard method called B method, and the results of its assessment of the content made more detailed provisions. The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the determination of synthetic resin emulsion as the base material of the water-based paint, and subjected to freeze-thawed, its viscosity, anti-coagulation or anti-caking Have damaging other aspects of change and test methods for maintaining the original performance level.

This standard applies to the determination of the freeze-thaw durability paint.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528:2000, IDT)

GB/T 9269 Determination of viscosity of architectural coatings Stormer viscometer method

3 Instruments and Materials

3.1 freezer. a suitable case, its size should be able to accommodate a number of test samples, the inside temperature should be maintained at the desired temperature of the test ± 2 °C.

3.2 viscometer. Stormer with a paddle-type rotor (Stormer) viscometer.

3.3 Black and white card stock. black reflectance of less than 1%; white reflectance of (80 ± 2)%.

4 Sampling

According to the provisions of GB/T 3186, and take representative samples of the test product.

5 Test procedure