Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of National Technical Committee 5 on Paints & Pigments of Standardization Administration of China (SAC/TC 5).
Introduction
This standard has been formulated in order to implement the relevant requirements of Law of the People's Republic of China on the prevention and control of atmospheric pollution, Comprehensive work plan for energy conservation and emission reduction in the 13th Five-Year Plan period, Work programme for prevention and control of volatile organic compound pollution in the 13th Five-Year Plan period, and Notice of the State Council on printing and distributing the Three-Year Action Plan to win the battle of safeguarding blue sky. This standard has been prepared according to the principles as follows:
a) Well-developed standards and norms at home and abroad are actively consulted to embody the principle of “scientificity, progressiveness, feasibility and normalization”.
b) Following the principle of coordination with mandatory national standards, keeping basically consistent with mandatory national standards in classification, and providing higher technical requirements than the relevant technical requirements of mandatory national standards.
c) The requirements of environmental protection and the needs of industry development are comprehensively considered so as to achieve technological progressiveness and economical rationality.
In recent years, environmentally friendly coatings, such as water-borne coatings, high-solid coatings, solvent-free coatings, radiation-curable coatings, powder coatings, etc., have made considerable progress under the guidance of environmental protection requirements and industrial policies. For example, water-borne coating varieties such as architectural wall coating, container coating and automotive OEM coating have been successfully developed and widely used. Although powder coatings, solvent-free coatings and radiation-curable coatings are limited by application method, their application scope is still gradually expanding. The technology and application of high solid coating are becoming more and more mature. All these have strongly promoted the green transformation of China's coating industry to coatings with low volatile organic compound content.
Coatings are widely used, and the technological development and user requirements of coating products vary considerably with type and application. Therefore, the concept of low volatile organic compound (VOC) content mainly refers to a relative reduction of VOC content at the current state of art so as to reduce VOCs from the source.
VOC emission of coating product is not only related to the VOC in the container of coating product and the VOC in the coating, but also related to the coating maintenance frequency after application. Coatings with good quality and durability have long maintenance intervals and less VOC emission in their service life cycle.
This standard is not intended for the selection of coatings with low volatile organic compound content. Each category of coating has its specific application requirements.
This standard specifies requirements, test methods, judgment rules, package marking and implementation of standard for coating products with low volatile organic compound content.
This standard is applicable to the determination of coating products with low volatile organic compound content.
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.
GB/T 1725-2007 Paints, varnishes and plastics—Determination of non-volatile-matter content
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes—Sampling
GB/T 5206-2015 Paints and varnishes—Terms and definitions
GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods
GB/T 6750-2007 Paints and varnishes—Determination of density—Pyknometer method
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 9750 Marks for package of coating products
GB/T 23985-2009 Paints and varnishes—Determination of volatile organic compound (VOC) content—Difference method
GB/T 23986-2009 Paints and varnishes—Determination of volatile organic compound (VOC) content—Gas-chromatographic method
GB/T 34675-2017 Determination of volatile organic compound (VOC) content in radiation curable coatings
GB/T 34682-2017 Determination of volatile organic compound (VOC) content in reactive diluent containing coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5206-2015 and the following apply. For the convenience of use, some terms and definitions in GB/T 5206-2015 are listed below.
coating product, in which the mass of volatile organic compounds in as applied condition meets the requirements to the content limit of volatile organic compounds for corresponding products given in this standard
3.2
coating material
liquid, pasty or powdered product, which, as applied onto the substrate, can form a coating with protection, decoration and/or other special functions
[GB/T 5206-2015, Definition 2.51]
3.3
volatile organic compound (VOC)
an organic compound that participates in atmospheric photochemical reactions, or is defined in accordance with relevant provisions
3.4
volatile organic compound content
VOC content
mass of VOCs in coatings measured under prescribed conditions
[GB/T 5206-2015, Definition 2.271]
3.5
application condition
the condition under which the application of the mixture of all the product components is allowed once the application method and application conditions meet the requirements in the technical specifications of the product
4 Requirements
The limits of VOC content in water-borne coating, solvent-based coating, solvent-free coating and radiation curable coating shall meet the requirements of Tables 1, 2, 3 and 4 respectively.
For water-borne coatings and water-borne radiation curable coatings, the dilution ratio with water is not considered. Other category of coating shall be determined after mixing according to the application ratio in the application condition as stated for the product. Where the consumption of one of the components is within a certain range, determination shall be carried out after mixing according to the maximum ratio specified for the application ratio of the product under application condition. Where the coating product is suitable for multiple applications, the strictest limit value shall apply.
Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 5 Test methods 6 Judgment rules 7 Package marking 8 Standard implementation Annex A (Normative) Determination of moisture content—Gas chromatographic method Bibliography
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of National Technical Committee 5 on Paints & Pigments of Standardization Administration of China (SAC/TC 5).
Introduction
This standard has been formulated in order to implement the relevant requirements of Law of the People's Republic of China on the prevention and control of atmospheric pollution, Comprehensive work plan for energy conservation and emission reduction in the 13th Five-Year Plan period, Work programme for prevention and control of volatile organic compound pollution in the 13th Five-Year Plan period, and Notice of the State Council on printing and distributing the Three-Year Action Plan to win the battle of safeguarding blue sky. This standard has been prepared according to the principles as follows:
a) Well-developed standards and norms at home and abroad are actively consulted to embody the principle of “scientificity, progressiveness, feasibility and normalization”.
b) Following the principle of coordination with mandatory national standards, keeping basically consistent with mandatory national standards in classification, and providing higher technical requirements than the relevant technical requirements of mandatory national standards.
c) The requirements of environmental protection and the needs of industry development are comprehensively considered so as to achieve technological progressiveness and economical rationality.
In recent years, environmentally friendly coatings, such as water-borne coatings, high-solid coatings, solvent-free coatings, radiation-curable coatings, powder coatings, etc., have made considerable progress under the guidance of environmental protection requirements and industrial policies. For example, water-borne coating varieties such as architectural wall coating, container coating and automotive OEM coating have been successfully developed and widely used. Although powder coatings, solvent-free coatings and radiation-curable coatings are limited by application method, their application scope is still gradually expanding. The technology and application of high solid coating are becoming more and more mature. All these have strongly promoted the green transformation of China's coating industry to coatings with low volatile organic compound content.
Coatings are widely used, and the technological development and user requirements of coating products vary considerably with type and application. Therefore, the concept of low volatile organic compound (VOC) content mainly refers to a relative reduction of VOC content at the current state of art so as to reduce VOCs from the source.
VOC emission of coating product is not only related to the VOC in the container of coating product and the VOC in the coating, but also related to the coating maintenance frequency after application. Coatings with good quality and durability have long maintenance intervals and less VOC emission in their service life cycle.
This standard is not intended for the selection of coatings with low volatile organic compound content. Each category of coating has its specific application requirements.
Technical requirement for
low-volatile-organic-compound-content coatings product
1 Scope
This standard specifies requirements, test methods, judgment rules, package marking and implementation of standard for coating products with low volatile organic compound content.
This standard is applicable to the determination of coating products with low volatile organic compound content.
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.
GB/T 1725-2007 Paints, varnishes and plastics—Determination of non-volatile-matter content
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes—Sampling
GB/T 5206-2015 Paints and varnishes—Terms and definitions
GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods
GB/T 6750-2007 Paints and varnishes—Determination of density—Pyknometer method
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 9750 Marks for package of coating products
GB/T 23985-2009 Paints and varnishes—Determination of volatile organic compound (VOC) content—Difference method
GB/T 23986-2009 Paints and varnishes—Determination of volatile organic compound (VOC) content—Gas-chromatographic method
GB/T 34675-2017 Determination of volatile organic compound (VOC) content in radiation curable coatings
GB/T 34682-2017 Determination of volatile organic compound (VOC) content in reactive diluent containing coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5206-2015 and the following apply. For the convenience of use, some terms and definitions in GB/T 5206-2015 are listed below.
3.1
low-volatile-organic-compound-content coatings product
coating product, in which the mass of volatile organic compounds in as applied condition meets the requirements to the content limit of volatile organic compounds for corresponding products given in this standard
3.2
coating material
liquid, pasty or powdered product, which, as applied onto the substrate, can form a coating with protection, decoration and/or other special functions
[GB/T 5206-2015, Definition 2.51]
3.3
volatile organic compound (VOC)
an organic compound that participates in atmospheric photochemical reactions, or is defined in accordance with relevant provisions
3.4
volatile organic compound content
VOC content
mass of VOCs in coatings measured under prescribed conditions
[GB/T 5206-2015, Definition 2.271]
3.5
application condition
the condition under which the application of the mixture of all the product components is allowed once the application method and application conditions meet the requirements in the technical specifications of the product
4 Requirements
The limits of VOC content in water-borne coating, solvent-based coating, solvent-free coating and radiation curable coating shall meet the requirements of Tables 1, 2, 3 and 4 respectively.
For water-borne coatings and water-borne radiation curable coatings, the dilution ratio with water is not considered. Other category of coating shall be determined after mixing according to the application ratio in the application condition as stated for the product. Where the consumption of one of the components is within a certain range, determination shall be carried out after mixing according to the maximum ratio specified for the application ratio of the product under application condition. Where the coating product is suitable for multiple applications, the strictest limit value shall apply.
Contents of GB/T 38597-2020
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Judgment rules
7 Package marking
8 Standard implementation
Annex A (Normative) Determination of moisture content—Gas chromatographic method
Bibliography
