News Details
Waterborne polyurethane anti-corrosion paint crosslinking agent
2017-7-2 23:49:33
Waterborne polyurethane anti-corrosion paint crosslinking agent
Chinese name: Diethyl toluene diamine(DETDA)
Water-based one-component polyurethane coating is the first application of waterborne polyurethane coating, its biggest advantage is with water as dispersion medium, when used as coating contains no organic liquid packing, in the process of film forming is the volatilization of water to the environment, accord with the requirement of environmental protection, and simple construction.
One-component polyurethane has a high elongation at break and appropriate intensity, and can normal temperature drying, still is given priority to with single component waterborne polyurethane coatings home and abroad, but compared with waterborne two-component polyurethane coatings, water-based one-component polyurethane coating of mechanical properties, water resistance, chemical resistance and solvent resistance are not ideal.
It is usually necessary to deal with the coating of a single component to improve the crosslinking of the coating. Therefore, the application of monocomponent waterborne polyurethane anti-corrosion coatings in the field of anti-corrosion is very limited.
Two-component waterborne polyurethane anticorrosive paint. Two-component waterborne polyurethane coatings is a kind of new environmentally friendly coatings, it is mainly composed of plural alcohol and water containing hydroxyl containing isocyanate curing agent of composition, because of the two-component waterborne polyurethane coatings with water as medium, and the two-component solvent-based coating of high performance and water-based coating with low VOC content, therefore, the research and development of waterborne two-component polyurethane coatings in recent years become very active.
Mr James tien pei-chun, such as PE, BDO, DMPA and IPDI to waterborne polyurethane was synthesized from aqueous polyurethane dispersions, big monomer with waterborne polyurethane monomers and BA, MMA, HEA, TFEA acrylic monomers such as fluorinated acrylate was synthesized as nuclear, water-based polyurethane for shell hydroxyl fluoride acrylic polyurethane hybrid body. Various factors that influence coating performance are discussed. The water-based polyurethane dispersion is a good dispersion of polyisocyanate crosslinking agent.
The hydroxyl component waterborne curing agents with complex configuration of room temperature curing waterborne two-component fluoride acrylic polyurethane coating has excellent water resistance and aging resistance, can be widely used in exterior walls, steel structure and some other demanding occasions to coating, coating is a kind of high performance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The influence of the crosslinking density on the improvement of the film performance was studied by using crosslinking curing agent nitropropyridine and acrylic polyurethane composite emulsion (PUA). The structure and mechanical properties of polyurethane film were studied by ir and tensile tests.
The results showed that the physical and mechanical properties of the coatings were not changed, and the hardness was slightly improved, and the water resistance, alkali resistance and solvent resistance of the coatings were significantly improved. With the decrease of PU content in the system, the tensile strength of the system increases, and the elongation of the fracture decreases. When the used crosslinking curing dose is about 2%, the water resistance and alkali resistance are the best, and the mechanical properties of the coatings are best.
Research progress of waterborne polyurethane anti-corrosion coatings. Polyurethane has good physical and mechanical properties and excellent cold tolerance, elasticity, flexibility and abrasion resistance, but its anti-corrosion performance is relatively poor [16, 17]. The current successful application of water-based coatings in industrial preservation is water-based acrylic coatings, water-based epoxy coatings, and water-based inorganic zinc silicate coatings. Although waterborne polyurethane coating is in line with the trend of developing environmentally friendly coatings in the coating industry, it can not meet the requirements of anticorrosive properties and needs to be modified.
Epoxy resin modified waterborne polyurethane anticorrosive paint. Epoxy resin with high modulus, high strength, excellent adhesion and low shrinkage ratio, on water, moderate acid, alkali and other solvents have good corrosion resistance and chemical resistance, and can be directly involved in the synthesis of waterborne polyurethane reaction, improve the comprehensive performance of waterborne polyurethane coating.
At present single component waterborne polyurethane anti-corrosion coatings mainly with epoxy resin as modifier, epoxy resin as a kind of important polymeric materials in anti-corrosion field, can be used for modified waterborne polyurethane pu good anti-corrosion performance. In recent years, the research on this aspect has attracted the active attention of researchers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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