News Details
Epoxy resin is commonly used in paint crosslinking agent
2017-4-28 22:47:22
Epoxy resin is commonly used in paint crosslinking agent,And its effect on epoxy coating properties. Epoxy resin is crosslinked by crosslinking agent. There are many varieties of crosslinking agents, dozens of which are commonly used in various kinds of amines, such as lipotamine and resins.
The differences in the mechanical properties of the coatings caused by various crosslinking agents are mainly the coating hardness, the gel time and the drying time of the coating. The nx-2040 performance is the best, with longer operating life and faster drying time, and the coating hardness is moderate. The differences in the chemical properties of coatings caused by various crosslinking agents are mainly oil resistance, oil-water mixture, acid resistance and solvability.
The acid and acetone solvents were poor in the concentrated crosslinking agent. The hydroxylamine, an underwater epoxy resin, has a poor water-resistant and salt-tolerant fog because of its molecular structure containing water molecules. Also, the combination of nx-2040 crosslinking agents is excellent.
Epoxy is a synthetic resin that contains two or more epoxy groups in the molecular structure and can be crosslinked. Epoxide group is made up of one atom of oxygen and two carbon atoms rings, highly active, enables epoxy resin with various types of crosslinking agent to produce crosslinking reaction, formation of two-dimensional reticular structure of the polymer.
The performance of epoxy resin has important relationship with molecular weight: low molecular weight epoxy resin is high in hardness, brittle, and low impact strength. Strong adhesion of linear epoxy resin, poor water resistance and more volatile coating; The medium molecular weight epoxy resin hardness and flexibility is moderate.
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.
The softening point is the softening temperature of the epoxy resin measured under the specified conditions, which can represent the molecular weight of epoxy resin. The low molecular weight of the softening point of epoxy resin is large.
Low molecular weight epoxy resin softening point < 50 ℃, polymerization degree < 2; Medium molecular weight of epoxy resin softening point in 50 ~ 95 ℃, the degree of polymerization of 2 ~ 5; High molecular weight of epoxy resin softening point > 100 ℃, polymerization degree > 5.
Used for solvent or without solvent epoxy self-leveling floor coating film material usually choose low viscosity of bisphenol A type epoxy resin, bisphenol F epoxy resin and aliphatic epoxy resin, etc. Bisphenol A type epoxy resin, bisphenol F type epoxy resin with coupling agent and clinch A deal after cross-linking cross-linking of film containing hydroxyl, less effective crosslinking density is big, anti corrosive medium penetration ability, excellent resistance to water and chemical resistance, but outdoors insolate resistance is poor.
The application of hydroxybisphenol A epoxy resin as base material, viscosity is low and can improve the weatherability of coating film. Due to no solvent epoxy floor coating can no longer in use the solvent to lower the viscosity of the coating material formula, so choose solvent-free epoxy coating binders, should meet the low viscosity, coating hydroxyl content and less effective crosslinking density etc., using aliphatic epoxy resin binders, can significantly improve weather resistance and physical and chemical properties of coating.
The solvent of epoxy resin coating must be used, and the reasonable choice of solvent is very important for the flat and dry time of epoxy coating.
Epoxy resins can be dissolved in ketones, esters, ether alcohols and chlorinated hydrocarbon solvents, not soluble in aromatic hydrocarbons and alcohols. However, the aromatic and alcohol-solvent mixtures can be used as solvents of the medium molecular weight epoxy resin. With the increase of the molecular weight, the dissolution of the resin decreases.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The differences in the mechanical properties of the coatings caused by various crosslinking agents are mainly the coating hardness, the gel time and the drying time of the coating. The nx-2040 performance is the best, with longer operating life and faster drying time, and the coating hardness is moderate. The differences in the chemical properties of coatings caused by various crosslinking agents are mainly oil resistance, oil-water mixture, acid resistance and solvability.
The acid and acetone solvents were poor in the concentrated crosslinking agent. The hydroxylamine, an underwater epoxy resin, has a poor water-resistant and salt-tolerant fog because of its molecular structure containing water molecules. Also, the combination of nx-2040 crosslinking agents is excellent.
Epoxy is a synthetic resin that contains two or more epoxy groups in the molecular structure and can be crosslinked. Epoxide group is made up of one atom of oxygen and two carbon atoms rings, highly active, enables epoxy resin with various types of crosslinking agent to produce crosslinking reaction, formation of two-dimensional reticular structure of the polymer.
The performance of epoxy resin has important relationship with molecular weight: low molecular weight epoxy resin is high in hardness, brittle, and low impact strength. Strong adhesion of linear epoxy resin, poor water resistance and more volatile coating; The medium molecular weight epoxy resin hardness and flexibility is moderate.
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.
The softening point is the softening temperature of the epoxy resin measured under the specified conditions, which can represent the molecular weight of epoxy resin. The low molecular weight of the softening point of epoxy resin is large.
Low molecular weight epoxy resin softening point < 50 ℃, polymerization degree < 2; Medium molecular weight of epoxy resin softening point in 50 ~ 95 ℃, the degree of polymerization of 2 ~ 5; High molecular weight of epoxy resin softening point > 100 ℃, polymerization degree > 5.
Used for solvent or without solvent epoxy self-leveling floor coating film material usually choose low viscosity of bisphenol A type epoxy resin, bisphenol F epoxy resin and aliphatic epoxy resin, etc. Bisphenol A type epoxy resin, bisphenol F type epoxy resin with coupling agent and clinch A deal after cross-linking cross-linking of film containing hydroxyl, less effective crosslinking density is big, anti corrosive medium penetration ability, excellent resistance to water and chemical resistance, but outdoors insolate resistance is poor.
The application of hydroxybisphenol A epoxy resin as base material, viscosity is low and can improve the weatherability of coating film. Due to no solvent epoxy floor coating can no longer in use the solvent to lower the viscosity of the coating material formula, so choose solvent-free epoxy coating binders, should meet the low viscosity, coating hydroxyl content and less effective crosslinking density etc., using aliphatic epoxy resin binders, can significantly improve weather resistance and physical and chemical properties of coating.
The solvent of epoxy resin coating must be used, and the reasonable choice of solvent is very important for the flat and dry time of epoxy coating.
Epoxy resins can be dissolved in ketones, esters, ether alcohols and chlorinated hydrocarbon solvents, not soluble in aromatic hydrocarbons and alcohols. However, the aromatic and alcohol-solvent mixtures can be used as solvents of the medium molecular weight epoxy resin. With the increase of the molecular weight, the dissolution of the resin decreases.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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