News Details
After part into fatty amine salt crosslinking agent
2017-4-19 13:47:55
After part into fatty amine salt crosslinking agent,The first successful development of type I waterborne epoxy crosslinking agent is Casmide360 Casmide362 and their modified products. With low molecular weight epoxy resin reaction with more ethylene amine to produce the polyamine - epoxy adduct, then through single epoxy compounds to end, with acetic acid and part of the secondary amine, to adjust the HLB of crosslinking agent, to reduce the reactivity of crosslinking agent, suitable for longer periods.
TaoYongZhong etc are low molecular weight liquid epoxy resin (E51) and polyethylene glycol reacts end epoxy compound, and then react with triethylene tetramine amino epoxy - amine adduct generated end, with a single epoxy compounds, with acetic acid and salt, finally obtained the I type water-borne epoxy crosslinking agent.
Due to the introduction of the long chain of polyethylene glycol (peg) reduces the crosslink density, improved the flexibility of the coating. Becker with epoxy resin, such as epoxy compounds react with polyethylene glycol (peg) to generate end, reaction with dimethylamine between benzene, again by the sealing side into salt crosslinking agent products.
Epoxy resin with the linear structure of the thermoplastic heated solid to liquid, high viscosity is a low viscosity, only used with crosslinking agent has practical value (pure one-component waterborne epoxy system also need to join the latent type cross-linking agent). So waterborne epoxy system should include water-based epoxy resin and water-borne epoxy crosslinking agent, likewise, waterborne them respectively by different way can form three different forms of water dispersion.
Waterborne resin through different ways can form three different forms of water dispersion: 1) water soluble; (2) micellar dispersible; (3) emulsion.
So waterborne epoxy system combined with more choice (in theory has nine combinations of form), but also increased the choice is difficult. In practical application process, at the same time by adding a large number of fillers, additives, etc., improve the application of waterborne epoxy system performance also cover up the deficiencies of waterborne epoxy system and even serious defects, it will increase more uncertainty and complexity.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Your, focus on waterborne epoxy resin respectively form and form of waterborne epoxy crosslinking agent at the same time, through the control of the nature of the waterborne epoxy and water-borne epoxy evaluation to achieve faster and better choice of waterborne epoxy system, everything must firmly foundation for you!
No matter which kind of form selection of waterborne epoxy resin and water-borne epoxy crosslinking agent, finally has practical application value of waterborne epoxy system is a kind of dispersed multiphase structure, composed of waterborne epoxy resin, water-borne epoxy crosslinking agent, such as water multiphase composition, its mechanism of membrane is different from the general polymer emulsion acrylic emulsion as film forming (condenses into membrane, physical process), and at the same time and solvent epoxy film is not identical also, in solvent epoxy system, epoxy resin and the crosslinking agent are in the form of molecules dissolved in organic solvent, formation of the system is homogeneous, crosslinking reaction between the molecules, thus crosslinking reaction more fully, formed by crosslinking is homogeneous.
Water-based epoxy for multiphase system, epoxy resins and crosslinking agent in the form of the dispersed phase dispersed in the water phase, cross-linking cross-linking process is in the process of evaporation of water particles between the mutual penetration of internal diffusion of crosslinking reaction process, therefore, waterborne epoxy crosslinking degree depends on the following factors:
Waterborne epoxy resin and the better the compatibility of waterborne epoxy crosslinking agent, the crosslinking agent particles and epoxy resin particles mutual internal diffusion, is advantageous to the crosslinking reaction;
Particle size is small, waterborne epoxy resin and water-borne epoxy crosslinking agent dispersed phase particles can fully permeable to the kernel so as to achieve a completely crosslinking degree.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
TaoYongZhong etc are low molecular weight liquid epoxy resin (E51) and polyethylene glycol reacts end epoxy compound, and then react with triethylene tetramine amino epoxy - amine adduct generated end, with a single epoxy compounds, with acetic acid and salt, finally obtained the I type water-borne epoxy crosslinking agent.
Due to the introduction of the long chain of polyethylene glycol (peg) reduces the crosslink density, improved the flexibility of the coating. Becker with epoxy resin, such as epoxy compounds react with polyethylene glycol (peg) to generate end, reaction with dimethylamine between benzene, again by the sealing side into salt crosslinking agent products.
Epoxy resin with the linear structure of the thermoplastic heated solid to liquid, high viscosity is a low viscosity, only used with crosslinking agent has practical value (pure one-component waterborne epoxy system also need to join the latent type cross-linking agent). So waterborne epoxy system should include water-based epoxy resin and water-borne epoxy crosslinking agent, likewise, waterborne them respectively by different way can form three different forms of water dispersion.
Waterborne resin through different ways can form three different forms of water dispersion: 1) water soluble; (2) micellar dispersible; (3) emulsion.
So waterborne epoxy system combined with more choice (in theory has nine combinations of form), but also increased the choice is difficult. In practical application process, at the same time by adding a large number of fillers, additives, etc., improve the application of waterborne epoxy system performance also cover up the deficiencies of waterborne epoxy system and even serious defects, it will increase more uncertainty and complexity.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Your, focus on waterborne epoxy resin respectively form and form of waterborne epoxy crosslinking agent at the same time, through the control of the nature of the waterborne epoxy and water-borne epoxy evaluation to achieve faster and better choice of waterborne epoxy system, everything must firmly foundation for you!
No matter which kind of form selection of waterborne epoxy resin and water-borne epoxy crosslinking agent, finally has practical application value of waterborne epoxy system is a kind of dispersed multiphase structure, composed of waterborne epoxy resin, water-borne epoxy crosslinking agent, such as water multiphase composition, its mechanism of membrane is different from the general polymer emulsion acrylic emulsion as film forming (condenses into membrane, physical process), and at the same time and solvent epoxy film is not identical also, in solvent epoxy system, epoxy resin and the crosslinking agent are in the form of molecules dissolved in organic solvent, formation of the system is homogeneous, crosslinking reaction between the molecules, thus crosslinking reaction more fully, formed by crosslinking is homogeneous.
Water-based epoxy for multiphase system, epoxy resins and crosslinking agent in the form of the dispersed phase dispersed in the water phase, cross-linking cross-linking process is in the process of evaporation of water particles between the mutual penetration of internal diffusion of crosslinking reaction process, therefore, waterborne epoxy crosslinking degree depends on the following factors:
Waterborne epoxy resin and the better the compatibility of waterborne epoxy crosslinking agent, the crosslinking agent particles and epoxy resin particles mutual internal diffusion, is advantageous to the crosslinking reaction;
Particle size is small, waterborne epoxy resin and water-borne epoxy crosslinking agent dispersed phase particles can fully permeable to the kernel so as to achieve a completely crosslinking degree.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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