News Details
Crosslinking agent for water-based coating resin
2017-6-14 10:55:39
Crosslinking agent for water-based coating resin
Water-based coatings and organic solvents are similar in some places. But in some cases, water-based coatings often face difficulties in organic solvents. The main difference between the two systems is the gradual disappearing mechanism of the volatile phase of the film. The film process also has a great influence on the final performance of the coating.
Anionic water-borne coating resin of carboxyl and hydroxyl groups, provides the possibility of further crosslinking, at room temperature can react with carboxyl and hydroxyl functionality more compounds can be used as crosslinking agent.
Water in a water-based coating has a very high boiling point and therefore the process is very slow, very dependent on the humidity of the environment. In low humidity, it may dry quickly and sometimes cause cracks. In high humidity (for example, the moisture content of the tropical country of Nicaragua is 78-85%), the process of film-forming process will be slow to cause the coating's sagging. It takes more energy to dry, even four times as much as a solvent, because the water is hotter than the heat.
Water-based coating has a high degree of cleanliness in the construction process and material surface, because the surface tension of the water is large, it is not easy to encroaching, easily make the coating film produce shrinkage hole. This problem is particularly acute in oily surfaces.
Water-based coating dispersion stability against strong mechanical force, rapid changes in flow velocity within the pipeline, the dispersed particles are compressed into solid particles, make the film produces pitting. The pipes are well in shape and the wall is not defective.
Water-based coating has a corrosive effect on the coating equipment, especially the corrosion of iron equipment. It is often necessary to use anti-corrosive lining or stainless steel materials, and the equipment is expensive. The corrosion of the conveyer pipe, the dissolution of the metal, the separation of the dispersed particles, the resulting flax, and the stainless steel pipe.
The baking type water coating is strict to the construction environment condition (temperature, humidity), increase the input of temperature adjustment wet equipment, and also increase the energy consumption.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： 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 evaporation of water is very hot and the baking energy is expended. Cathodic electrophoretic coatings should be at 180 ℃ baking; And latex paint is completely dry for a long time.
The high boiling organic solvent produces a lot of lampblack during baking, and the condensation is applied to the surface of the coating. The coating layer formed is often sensitive to water, even if the amount of water vapor in the air increases the fold of the coating.
Water-based paint, although has many problems, through the formulation and coating process and equipment and so on technology unceasing enhancement, get to prevent some problems in the process, some through the formula itself to improve and improve.
As an emerging type of chaoyang, water-based coatings have been and will continue to develop rapidly. Given increasing attention to environmental protection, energy and health, and development of waterborne coatings in the foreseeable future will be the task of government and science and technology workers are continuous and persistent.
The development of the emulsion is the ability of the micelle to have self-coalescing, which can reduce the use of the common solvent. The comprehensive performance of waterborne coatings is enhanced by the new formulation based on polyurethane and hybrid polymers and the use of new interlinking film methods.
The range of waterborne coatings, in addition to the widely use of interior and exterior wall coating, waterborne wood coatings, waterborne anticorrosion coating, waterproof coating, waterborne polyurethane coatings also into green recommended standard range.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Water-based coatings and organic solvents are similar in some places. But in some cases, water-based coatings often face difficulties in organic solvents. The main difference between the two systems is the gradual disappearing mechanism of the volatile phase of the film. The film process also has a great influence on the final performance of the coating.
Anionic water-borne coating resin of carboxyl and hydroxyl groups, provides the possibility of further crosslinking, at room temperature can react with carboxyl and hydroxyl functionality more compounds can be used as crosslinking agent.
Water in a water-based coating has a very high boiling point and therefore the process is very slow, very dependent on the humidity of the environment. In low humidity, it may dry quickly and sometimes cause cracks. In high humidity (for example, the moisture content of the tropical country of Nicaragua is 78-85%), the process of film-forming process will be slow to cause the coating's sagging. It takes more energy to dry, even four times as much as a solvent, because the water is hotter than the heat.
Water-based coating has a high degree of cleanliness in the construction process and material surface, because the surface tension of the water is large, it is not easy to encroaching, easily make the coating film produce shrinkage hole. This problem is particularly acute in oily surfaces.
Water-based coating dispersion stability against strong mechanical force, rapid changes in flow velocity within the pipeline, the dispersed particles are compressed into solid particles, make the film produces pitting. The pipes are well in shape and the wall is not defective.
Water-based coating has a corrosive effect on the coating equipment, especially the corrosion of iron equipment. It is often necessary to use anti-corrosive lining or stainless steel materials, and the equipment is expensive. The corrosion of the conveyer pipe, the dissolution of the metal, the separation of the dispersed particles, the resulting flax, and the stainless steel pipe.
The baking type water coating is strict to the construction environment condition (temperature, humidity), increase the input of temperature adjustment wet equipment, and also increase the energy consumption.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： 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 evaporation of water is very hot and the baking energy is expended. Cathodic electrophoretic coatings should be at 180 ℃ baking; And latex paint is completely dry for a long time.
The high boiling organic solvent produces a lot of lampblack during baking, and the condensation is applied to the surface of the coating. The coating layer formed is often sensitive to water, even if the amount of water vapor in the air increases the fold of the coating.
Water-based paint, although has many problems, through the formulation and coating process and equipment and so on technology unceasing enhancement, get to prevent some problems in the process, some through the formula itself to improve and improve.
As an emerging type of chaoyang, water-based coatings have been and will continue to develop rapidly. Given increasing attention to environmental protection, energy and health, and development of waterborne coatings in the foreseeable future will be the task of government and science and technology workers are continuous and persistent.
The development of the emulsion is the ability of the micelle to have self-coalescing, which can reduce the use of the common solvent. The comprehensive performance of waterborne coatings is enhanced by the new formulation based on polyurethane and hybrid polymers and the use of new interlinking film methods.
The range of waterborne coatings, in addition to the widely use of interior and exterior wall coating, waterborne wood coatings, waterborne anticorrosion coating, waterproof coating, waterborne polyurethane coatings also into green recommended standard range.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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