Coating Committee network announced new standards for products to help industrial coatings water-based transformation and upgrading

China Coatings Network
News: With the increasingly stringent environmental regulations, especially on February 1, 2015, the national VOC content of more than 420 g / liter (including) of
coatings
after the imposition of a 4% consumption tax policy, the traditional solvent-based industry
coating enterprises
to water, powder and other environmental protection direction of the transformation and upgrading process has been fast horse whipping.
Of the many
water-based coatings
systems, water-based polyurethane coatings, water-based epoxy coatings and water-based acrylic coatings are the areas of most concern, and since June 1, 2015, HG/T 4761-20 has been developed by the National Technical Committee for Standardization of Coatings and Pigments (SAC/TC5). 14 "Water-based polyurethane coatings", HG/T 4759-2014 "water-based epoxy resin
anti-corrosion coatings
", HG/T 4758-2014 "water-based acrylic coatings" and other 3 water-based
industrial coatings
product standards will be formally implemented. The implementation of these standards will be an important milestone in the development of water-based industrial coatings in China.
At present, China's water-based polyurethane coating market is in the initial stage, has not really formed a scale, but with the general promotion of environmental awareness of the whole society, especially the environmental protection regulations of various countries on the voC content requirements in the paint increasingly strict, the technology is becoming more mature and the cost of raw materials gradually reduced, water-based polyurethane coatings will usher in a vigorous development opportunities. HG/T 4761-2014 "water-based polyurethane coating" new standards for water as a dispersion medium, polyurethane resin as the main film, add
pigment
(clear Paint without) and additives applied to metal and cement mortar, concrete and other inorganic non-metallic substrate surface for decoration and protection of the normal temperature self-drying type single, double-group and single-part high-temperature baking type water-based polyurethane coating. The standard divides water-based polyurethane coatings into metal surface coatings and inormeric non-metallic surface coatings, and puts forward the relevant technical index requirements.
, epoxy coatings account for a considerable proportion of corrosion-resistant coatings used in steel structures. The traditional solvent-based epoxy coating has produced a large number of volatile organic volatiles in the production and construction process, so the hydration development of epoxy resin has been put on the agenda. Although water-based epoxy resins have been studied for more than 25 years and water-based epoxy coatings have been used for more than 10 years, the overall application of water-based epoxy resins and water-based epoxy coatings have not yet formed large-scale production and application. At present, the quality and protective effect of water-based epoxy anti-corrosion coatings on the market are not satisfactory, often coating accidents. Therefore, an industry standard is needed to regulate the production, construction and application of this type of coating. HG/T 4759-2014 "water-based epoxy anti-corrosion coating" new standards applicable to the metal substrate water-based epoxy resin anti-corrosion coating, respectively, the primer, intermediate paint, paint put forward the relevant technical indicators.
-based acrylic coatings are used not only in industrial or civil applications as protection against metals such as steel, but also, in many cases, as protection against cement or wood. This water-based coating is highly competitive in terms of environmental protection, performance and price, including climate aging resistance and reduced volatile organic compound content. In foreign countries, the product has been a considerable degree of popularity, in the domestic application of its more and more extensive. At present, there are a variety of water-based acrylic protective coating products on the market, because there is no uniform standards and norms, its product quality, environmental protection requirements and construction effects are uneven, the urgent need for relevant product standards to regulate the market. HG/T 4758-2014 "Water-based acrylic coating" is suitable for acrylic resin as the main
film-forming substance
water-based single-part or two-part coating, products are mainly used for metal surface decoration and protection. The standard divides the water-based acrylic coating into I. type baking cross-curing type coating, II.type room temperature self-drying type single-part coating and III.type normal temperature cross-curing type double-part coating, and puts forward the relevant technical index requirements respectively.