New technology of high-performance polymer emulsion preparation and its application in water-based wood coatings

more than 50% of China's coatings are traditional solvent-based coatings, which emit about 6 million tons of organic solvents to the air each year to pollute the environmentThe waterization of oily coatings is the development direction of the world coating industry, and developed countries have enacted legislation to ban oily wood materials at the beginning of this centuryChina produces more than 75% of the world's wood furniture, toys and handicrafts, with domestic oil-based paint coating can not be exported, with the best foreign water-based paint such as German Dufang products, there is a low film hardness, water resistance and poor pollution resistance and other shortcomings, in the case of large changes in temperature / humidity will stick and depaintproject team from the water-based wood material performance by temperature, humidity, water quality, materials and other factors from the analysis, from the development of high-performance polymer emulsion, after more than ten years of industrial and research cooperation, developed in line with the standards of Europe and the United States 15 kinds of high-performance polymer emulsion and more than 50 kinds of water-based wood coating products, to achieve large-scale production and applicationProducts in the coating hardness, water resistance, chemical resistance and anti-boom ingenuity and other aspects of the German Dufang products, to solve the water-based wood coatings appear adhesion and depainting of the world's problemsThe main key technologies developed by the project are: macromolecule emulsification, controlled crosslinking of pH, solvent-driven sol-gel, procedural emulsification and polymerization-separation integration processesthe above technology is reflected in the following three aspects of innovation: 1, the development of high solid content polymer water dispersion preparation of new processesThe polymer water dispersion containing more than 50% of the polymer water dispersion is prepared by emulsified the polymer containing the pyridineDevelop pH-controlled crosslinking technology, improve the cross-linking density of coating film, eliminate the effect of residual hydrophilic pyrethroid/amine-based coating on water resistance in coating film, solve the problem of chemical resistance and poor stain resistance of polyurethane water dispersion (PUD), PUD coating film resistance to 10 levels (foreign is 6-8 levels)2, the invention of acrylic polyurethane copolymer emulsion (PUA) preparation methodThe preparation of PUA with water-based polyurethanes as macromolecule emulsifiers and reactants increased the coating hardness to 0.66 (foreign 0.54) through the chemical compound of epoxy, acrylic and polyurethane, and developed the process technology of procedural emulsification and polymerization-separation integration to achieve the industrial and stable production of 10,000 tons of PUA emulsiasis per year3, the development of high-performance polyacrylate emulsion (PA) preparation of new technologyDevelopment of room temperature cross-linking high solid content PA emulsion, improve its closure to 10 levels (preferably 5 foreign); The project products through the international authority SGS (Swiss general notary bank) and LGA (product safety and reliability) testing, more than the relevant standards in Europe and the United States; The project products are a large number of domestic and foreign manufacturers, coverage ranked first in the country, become the international furniture giant IKEA fixed-point supply products, with its painted wood, bamboo products have been exported to Europe and the United States and other countriesthe project has been authorized 15 invention patents (7 valid), has won the 10th and 18th China Patent Excellence Awards, participated in the formulation of national standards 6, published more than 60 SCI collection papersThe technology can also be used in water-based leather coatings and adhesives, textiles, paper coatings and construction, metals, plastic coatings and other fields