China's water-based coating standard system and application

China Coatings Online News Information
Introduction: Water-based coatings with water as a solvent or dispersion medium, no organic solvents (or low content of organic solvents), its safety, environmental protection characteristics have been concerned by all parties. The degree of water-based paint in developed countries is generally high, and the development of water-based coatings in China is still in its infancy, except for architectural coatings, the water-based level of coatings is still very low. With the adjustment of the structure of the paint industry, the policy is tilting towards environmentally friendly coatings, water-based coatings have been vigorous development, new products continue to emerge. In order to further promote and standardize the development of water-based coatings, while protecting the interests of consumers, the establishment of water-based coating standards system is particularly important, this paper through the collection, sorting, evaluation and generalization of China's current coating standards, combined with the standard system table preparation principles and requirements for the first time put forward the establishment of China's water-based coating standards system table, has practical significance. The scope of this article is limited to national and industry standards., water-based coating standard system table
standard system table is the most intuitive form of standard system, the standard system table is mainly composed of standard architecture diagram and standard schedule. The system table is purposeful, coordinated, hierarchical and developmental, and is convenient for dynamic management.
1, water-based coating standard architecture diagram
water-based paint standard architecture diagram is a combination of the "hierarchical" relationship and logical order between the "sequence" relationship between the upper and lower, as shown in Figure 1, the water-based coating standards are divided into basic standards, method standards, product standards. Among them, the basic standard is a kind of standard with wide application range in the field of coatings. Method standard (general standard) is a wide range of applicable standards in the field of coatings developed by various methods such as testing, analysis and assay. Product standards are standards that ensure that the applicability of the product should meet the requirements. The three large categories of standards are divided into different categories according to the scope of application.
2, Standard Schedule
Based on the water-based paint standard system framework diagram, a water-based paint standard schedule has been established, as shown in Table 1, limited to the length of the article, Table 1 failed to list all the standards. Each standard of the standard system is classified and corresponds to a unique system number, while the system table gives information such as the standard bid situation, standard category, standard grade and standard implementation date, such as Table 1.2, discuss
1, water-based paint standards
China's paint-related national standards, industry standards reached more than 400, local standards, enterprise standards are counted, coating standards involved in more than 10 industries, but specifically for water-based coatings standards but more than 20. By comparing the water-based paint standards and corresponding product standards that have been formulated, such as GB/T13492-92 "Automotive Paint of All Colors", GB/T13493-92 "Automotive Primer" and HG/T4570-2013 "Automotive Water-based Coatings", the corresponding water-based paint standards refer to the first two in project settings and parameter settings. At present, most resins can become water-based resins, with the development of science and technology, even if there is technically difficult to water-based resins, in the future development may also be overcome, combined with the above-mentioned situation, combined with the standard system open, dynamic principles, water-based coating standards system for the removal of solvent-based coating standards and solid coatings (powder coatings) standard coating standards system.
2, product classification
water-based paint standard architecture diagram, product standards are classified according to product use standards, which involves water-based coating products classification. China's 2003 promulgation of GB/T2705 - 2003 "paint product classification and naming" classification method 1 mainly to paint products as the main line, and supplemented by the main film classification.
standards in the water-based coatings standard architecture chart divide the water-based coatings standards into three main categories according to GB/T2705-2003 by use: building coating standards, industrial coating standards, general purpose coatings and auxiliary materials.
GB/T2705 - 2003 "Coating Product Classification and Naming" classification method 2 in addition to architectural coatings to paint products film-forming substances as the main line, supplemented by product use classification, the classification method exists questionable, first of all, any building coating has a major film-forming substances, it is listed as a classification of the main line principle has not been fully implemented performance, and secondly, by use classification than by film-forming substance classification can better link production and application. The standard system table of solid water-based coatings always implements the classification of water-based coatings for product use.
3, standard categorization
coating products, a wide range of applications, related standards are complex, if the standard is not accurately classified, easy to cause the standard body table is not coordinated, lack of dynamic management.
standards include basic standards in the field of coatings and specific coating basic standards; Method standards include common method standards and special method standards, in order to facilitate the application of water-based standard systems, specific coating basic standards and special method standards are included in the specific product standard catalog. Such as the basic standard GB/T21088-2007 "classification and definition of water-based additives in architectural coatings" and the method standard GB/T9265-2009 "building coating alkaline resistance determination" are included in the building coating standards.
Industrial coatings contain anti-corrosion coatings, because of the wide range of applications of anti-corrosion coatings, involving more than 80 standards, so in the standard architecture map, anti-corrosion coating standards are further divided into anti-corrosion coatings general standards, building anti-corrosion coating standards, petroleum and petrochemical anti-corrosion coating standards, transportation anti-corrosion coating standards, electric water conservancy anti-corrosion coating standards and other types of anti-corrosion coating standards, due to limited space, the text does not list anti-corrosion coatings. With the above classification, it is easier to find the corresponding criteria in the standard system table.3. Conclusion
Water-based coating standard system is the necessary basic work to promote the healthy and orderly development of water-based coatings, scientific and clear-level standard system will provide technical support for standardized administrative agencies in the direction of decision-making standardization, the formulation of standardized policies, and finally, the development of water-based coatings will also promote the continuous development and improvement of the standard system.
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