News Details
Waterborne epoxy coatings crosslinking agent
2017-4-18 16:58:18
Waterborne epoxy coatings crosslinking agent,Waterborne epoxy coatings is a kind of environmentally friendly polymer materials, has a low content of organic solvent, low odor, chemical resistance, insulation, and many other advantages, has a wide range of USES and application prospect.
Waterborne epoxy system are briefly introduced, and several new type of waterborne epoxy system, first I and II generation were reviewed the domestic and foreign research progress of waterborne epoxy crosslinking agent, and the development trend of waterborne epoxy crosslinking agent was discussed.
Waterborne epoxy coatings system in traditional epoxy system has excellent adhesion, thermal stability, chemical resistance, insulation and other characteristics, on the basis of water as dispersion medium, excluding or contains only a small amount of organic solvent, is a kind of environmentally friendly polymer materials.
With the increasingly urgent and strict to the requirement of environmental protection, do not contain volatile organic solvents (volatileorganiccompound, VOC) or low volatile organic solvent, does not contain harmful air pollutants (nonhazardousairpollutants, NHAP) of waterborne epoxy system has become a focus of research.
Waterborne epoxy crosslinking agent is the key to the application of waterborne epoxy system. Now can only say that for a set with one type of epoxy resin for synthesis of crosslinking agent, so each working on a new crosslinking agent can solve a problem, is equivalent to the development of a new epoxy resin or opens up a new USES epoxy resin. Visible, the development of the crosslinking agent has very important significance. This article mainly introduced the waterborne epoxy system at home and abroad and the research progress of waterborne epoxy crosslinking agent.
Waterborne epoxy coating system is composed of epoxy resin and water-borne epoxy crosslinking agent. Waterborne epoxy crosslinking agent affect the physical and chemical properties of waterborne epoxy resin system is the important component, has become the current related fields at home and abroad, the research hot spot.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
At present, water-based epoxy system according to the way of film and two component system of physical state can be divided into type I and type II system.
System of type I and type II system. Type I system consists of low molecular liquid epoxy resin and water soluble amine of crosslinking agent, crosslinking agent in the system is both a crosslinking agent and emulsifier [2], this kind of crosslinking agent on the basis of polyamine, introduced in its molecular chain with surface active period, making it a amphiphilic molecules, which have a strong emulsification. Due to adopting liquid resin, type I don't have to join the solvent, waterborne epoxy system the system zero VOC.
Type II system by the quality of emulsion polymer solid epoxy resins and crosslinking agent, and the epoxy resin emulsion polymer quality under the room temperature is solid, softening point is 60 ~ 80! Mixture emulsion, so generally by the factory in advance, usually containing a small amount of harmful air pollutants. Crosslinking agent and type epoxy emulsion has good compatibility, does not require its emulsification.
This kind of crosslinking agent on the basis of polyamine, introduced in its molecular chain with surface active period, making it a amphiphilic molecules, which have a strong emulsification. Due to adopting liquid resin, type I don't have to join the solvent, waterborne epoxy system the system zero VOC.
Type II system by the quality of emulsion polymer solid epoxy resins and crosslinking agent, and the epoxy resin emulsion polymer quality under the room temperature is solid, softening point is 60 ~ 80! Mixture emulsion, so generally by the factory in advance, usually containing a small amount of harmful air pollutants. Crosslinking agent and type epoxy emulsion has good compatibility, does not require its emulsification.
Type I waterborne epoxy system can match into zero VOC and NHAP coating, coating hardness is growing rapidly, but the use of resin is liquid, after evaporation still need after a certain reaction time to reach the table dry; System of viscosity with the rapid increase with the extension of on time, show the applicable period short, about 2 ~ 4 h.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Waterborne epoxy system are briefly introduced, and several new type of waterborne epoxy system, first I and II generation were reviewed the domestic and foreign research progress of waterborne epoxy crosslinking agent, and the development trend of waterborne epoxy crosslinking agent was discussed.
Waterborne epoxy coatings system in traditional epoxy system has excellent adhesion, thermal stability, chemical resistance, insulation and other characteristics, on the basis of water as dispersion medium, excluding or contains only a small amount of organic solvent, is a kind of environmentally friendly polymer materials.
With the increasingly urgent and strict to the requirement of environmental protection, do not contain volatile organic solvents (volatileorganiccompound, VOC) or low volatile organic solvent, does not contain harmful air pollutants (nonhazardousairpollutants, NHAP) of waterborne epoxy system has become a focus of research.
Waterborne epoxy crosslinking agent is the key to the application of waterborne epoxy system. Now can only say that for a set with one type of epoxy resin for synthesis of crosslinking agent, so each working on a new crosslinking agent can solve a problem, is equivalent to the development of a new epoxy resin or opens up a new USES epoxy resin. Visible, the development of the crosslinking agent has very important significance. This article mainly introduced the waterborne epoxy system at home and abroad and the research progress of waterborne epoxy crosslinking agent.
Waterborne epoxy coating system is composed of epoxy resin and water-borne epoxy crosslinking agent. Waterborne epoxy crosslinking agent affect the physical and chemical properties of waterborne epoxy resin system is the important component, has become the current related fields at home and abroad, the research hot spot.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
At present, water-based epoxy system according to the way of film and two component system of physical state can be divided into type I and type II system.
System of type I and type II system. Type I system consists of low molecular liquid epoxy resin and water soluble amine of crosslinking agent, crosslinking agent in the system is both a crosslinking agent and emulsifier [2], this kind of crosslinking agent on the basis of polyamine, introduced in its molecular chain with surface active period, making it a amphiphilic molecules, which have a strong emulsification. Due to adopting liquid resin, type I don't have to join the solvent, waterborne epoxy system the system zero VOC.
Type II system by the quality of emulsion polymer solid epoxy resins and crosslinking agent, and the epoxy resin emulsion polymer quality under the room temperature is solid, softening point is 60 ~ 80! Mixture emulsion, so generally by the factory in advance, usually containing a small amount of harmful air pollutants. Crosslinking agent and type epoxy emulsion has good compatibility, does not require its emulsification.
This kind of crosslinking agent on the basis of polyamine, introduced in its molecular chain with surface active period, making it a amphiphilic molecules, which have a strong emulsification. Due to adopting liquid resin, type I don't have to join the solvent, waterborne epoxy system the system zero VOC.
Type II system by the quality of emulsion polymer solid epoxy resins and crosslinking agent, and the epoxy resin emulsion polymer quality under the room temperature is solid, softening point is 60 ~ 80! Mixture emulsion, so generally by the factory in advance, usually containing a small amount of harmful air pollutants. Crosslinking agent and type epoxy emulsion has good compatibility, does not require its emulsification.
Type I waterborne epoxy system can match into zero VOC and NHAP coating, coating hardness is growing rapidly, but the use of resin is liquid, after evaporation still need after a certain reaction time to reach the table dry; System of viscosity with the rapid increase with the extension of on time, show the applicable period short, about 2 ~ 4 h.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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