GB/T 9779-2026Multi-layer coatings for architecture (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document replaces GB/T 9779-2015 "Multi-Layer Architectural Coatings". Compared with GB/T 9779-2015, the main differences are structural adjustments and editorial changes.

Aside from the modifications, the main technical changes are as follows.

a) The scope has been changed (see Chapter 1, Chapter 1 of the 2015 edition);

b) Added main coatings, heat-barrier multi-layer architectural coatings, artistic multi-layer architectural coatings, waterproof decorative multi-layer architectural coatings, and elastic... Terms and definitions for multi-layer architectural coatings and compatibility (see 3.3, 3.11~3.15);

c) The terms "multi-layer architectural coating", "multi-color multi-layer architectural coating", "thick-paste multi-layer architectural coating", and "rock-flake multi-layer architectural coating" have been changed.

Definitions of granular multi-layer architectural coatings and composite multi-layer architectural coatings (see 3.1, 3.6~3.10, and 3.1, 3.8~ in the 2015 edition).

d) The terms and definitions for penetrating primer, sealing primer, and intermediate coat have been removed (see sections 3.3, 3.4, and 3.5 of the 2015 edition);

e) The classification and labeling have been changed (see Chapter 4, Chapter 4 of the 2015 edition);

f) The tensile strength and thermal conductivity of interior and exterior multi-layer architectural coatings have been added as test items and methods (see Tables 1, 2, 6.8, and 6.10). Appendix A);

g) The stain resistance and impact resistance of interior wall multi-layer architectural coatings have been added as test items and methods (see Tables 1, 6.16, 6.17, and Appendix B);

h) The impermeability and compatibility of exterior wall multi-layer architectural coatings have been added as test items and methods (see Tables 2, 6.18, 6.23, and Appendix C);

i) Additional requirements for other color indicators of the resistance to artificial weathering of exterior multi-layer architectural coatings have been added (see Table 2);

j) Technical requirements for primers and topcoats in multi-layer architectural coatings have been added (see 5.3 and 5.4);

k) The scrub resistance test for Type I (multi-colored multi-layer architectural coatings) has been removed (see Tables 1 and 2 in the 2015 edition);

l) The impact resistance and water permeability of exterior wall multi-layer building coatings have been removed (see Table 2 in the 2015 edition);

m) The requirements for asbestos-free fiber cement flat panels have been changed (see 6.3.1, 2015 edition of 6.3.1);

n) The requirements for test panels of the main coating and multi-layer system have been changed (see Table 3, Table 3 in the 2015 edition);

o) The preparation of the main coating film has been added (see 6.4.2);

p) The test methods for container condition, drying time, low temperature stability, elongation at break, flexibility, bond strength, and water resistance were modified. (See Chapter 6, Chapter 6 of the 2015 edition).

1 Scope

This document applies to multi-layer architectural coatings for the interior and exterior walls of buildings. […]

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies to this document.

GB 175 General Purpose Portland Cement

GB/T 528 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber

GB/T 1728-2020 Determination of drying time of paint film and putty film

GB/T 1731-2020 Determination of Flexibility of Paint Film and Putty Film

GB/T 1766 Rating Method for Aging of Paint and Varnish Coatings

GB/T 1865 Paints and varnishes - Artificial weathering and artificial radiation exposure - Filtered xenon arc radiation

GB/T 3186 Sampling of raw materials for paints, varnishes and paints and varnishes

GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories

GB/T 8170-2008 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 9265 Determination of Alkali Resistance of Architectural Coatings

GB/T 9266 Determination of washability of architectural coatings

GB/T 9268-2008 Determination of freeze-thaw resistance of latex paints

GB/T 9271-2008 Standard test plates for paints and varnishes

GB/T 9750 General Rules for Packaging, Marking, Transportation and Storage of Coatings and Pigments

GB/T 9780-2013 Test Method for Stain Resistance of Architectural Coatings

GB/T 15608-2006 Chinese Color System

GB/T 16777-2008 Test Methods for Waterproof Coatings for Buildings

GB/T 17671-2021 Test method for strength of cement mortar (ISO method)

GB 25190 National Food Safety Standard - Sterilized Milk

GB/T 29602 Solid Beverages

GB/T 30648.2 Determination of resistance to liquids of paints and varnishes - Part 2: Immersion method

GB/T 32064-2015 Thermal conductivity and thermal diffusivity of building materials - transient planar heat source test method

GB/T 41954-2022 On-site quality assessment test methods for interior wall coatings of paints and varnishes

HG/T 5065 Clear Topcoat Varnish for Architectural Coatings

JC/T 412.1-2018 Fiber Cement Flat Plates - Part 1: Asbestos-Free Fiber Cement Flat Plates

JG/T 25 Test Method for Temperature Degradation Resistance of Architectural Coatings