News Details
The effect of coating crosslinking agent on product performance
2017-5-3 16:26:59
The effect of coating crosslinking agent on product performance. The crosslinking temperature is 130 degrees centigrade, and the effect of the amount of crosslinking agent (relative to the percentage of epoxy resins) on the performance of the epoxy powder coating.
The physical mechanical properties of the crosslinking membrane increased with the use of crosslinking agents when the dose was less than 11%. And when the dosage of crosslinking agent of more than 11%, the physical and mechanical properties of crosslinked membrane decreased instead, this is because the resin and the dosage of crosslinking agent for 100 # 11 (mass ratio), resin crosslinking and crosslinking agent can form the ideal mesh structure. As a result, the best crosslinking agent is 11 per cent.
Crosslinking temperature affects the timing of crosslinking. The use of crosslinking agent (relative to the percentage of resin dosage) is used to determine the effect of crosslinking temperature on the time of the epoxy powder coating.
As the crosslinking temperature increases, the time required for the epoxy powder coating to be cross-linked is gradually decreasing, but when the temperature rises to 150 degrees Celsius, the amount of time it takes to cross-link increases; As we continue to heat up, the crosslinking time increases. At 140 degrees Celsius, the activity of the epoxy and the organic urea was highest.
As the crosslinking temperature increases, the reactive activity decreases. Improved production technology has increased the reaction of epoxy resins and crosslinking agent contact area, improved the activity of powder coating, can make the powder coating 8 min at 130 degrees Celsius and 140 degrees Celsius for 4 min completely crosslinking, more suitable for industrial production.
The coating has good hardness, adhesion and flexibility to meet the requirements of industrial production.
Chemical resistance to coating. According to GB/T9274? 88, GB/T1734? 93 such as regulation, crosslinked membrane samples in 18% HCl solution and 20% NaOH solution, K2Cr2O7 saturated solution, acetone, toluene, such as olive oil reagent, examination of crosslinked membrane chemical resistance. Experiments show that the coating has no change, indicates the type of crosslinker crosslinked epoxy powder coating has good chemical resistance, and can meet the requirements of industrial production.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Choice of filler. Light calcium carbonate, precipitated barium sulfate, talcum powder, such as epoxy powder coating can be used as a filler, in addition to have certain influence, stability, heat resistance, hardness, its main function is to reduce costs; But adding too much filler will reduce the physical mechanical properties of the coating.
The results of this experiment were 46% (relative to the percentage of resin).
Optimal formulation of epoxy powder coating. The crosslinking temperature is 130 degrees centigrade, and after a large number of experiments, the optimal formula is obtained by detecting all kinds of properties while achieving fast crosslinking.
The dynamic model obtained is a better description of the dynamic behavior of the carbon-synthesis dimethyl ether from C301 / p-al2o3.
Using C301 / P - Al2O3 as bifunctional catalyst, and the catalyst activity in the stable period, in the CO/H2 = 1.325, temperature 210 ~ 300 degrees Celsius, 2 ~ 4.3 MPa pressure, space velocity, 600 ~ 1800 ml/g (h % catalyst) conditions, obtained the carbon-rich syngas Intrinsic kinetics equation of preparing dimethyl ether and methanol synthesis r1 = k1PCOPH2 (1, 1) (1 + + KCO2PCO2 KCOPCO) (1 + K0.5 H2P0. 5 H2 + KWPW); Methanol dehydration r2 = k2P1. 5 M (1-2) (1 + K0.5 MP0.5 M + KH2OPH2O) 2; The water vapor transform r3 = k3PCOPW (1-3) (1 + KCOPCO + KCO2PCO2) (1 + P0.5 h2kw).
By carbon-rich syngas in C301 / P - Al2O3 catalyst in preparing dimethyl ether dynamics research, for methanol synthesis and methanol dehydration and water vapor transformation of three independent reaction apparent activation energy were 88.43, 42.56 and 11.92 kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The physical mechanical properties of the crosslinking membrane increased with the use of crosslinking agents when the dose was less than 11%. And when the dosage of crosslinking agent of more than 11%, the physical and mechanical properties of crosslinked membrane decreased instead, this is because the resin and the dosage of crosslinking agent for 100 # 11 (mass ratio), resin crosslinking and crosslinking agent can form the ideal mesh structure. As a result, the best crosslinking agent is 11 per cent.
Crosslinking temperature affects the timing of crosslinking. The use of crosslinking agent (relative to the percentage of resin dosage) is used to determine the effect of crosslinking temperature on the time of the epoxy powder coating.
As the crosslinking temperature increases, the time required for the epoxy powder coating to be cross-linked is gradually decreasing, but when the temperature rises to 150 degrees Celsius, the amount of time it takes to cross-link increases; As we continue to heat up, the crosslinking time increases. At 140 degrees Celsius, the activity of the epoxy and the organic urea was highest.
As the crosslinking temperature increases, the reactive activity decreases. Improved production technology has increased the reaction of epoxy resins and crosslinking agent contact area, improved the activity of powder coating, can make the powder coating 8 min at 130 degrees Celsius and 140 degrees Celsius for 4 min completely crosslinking, more suitable for industrial production.
The coating has good hardness, adhesion and flexibility to meet the requirements of industrial production.
Chemical resistance to coating. According to GB/T9274? 88, GB/T1734? 93 such as regulation, crosslinked membrane samples in 18% HCl solution and 20% NaOH solution, K2Cr2O7 saturated solution, acetone, toluene, such as olive oil reagent, examination of crosslinked membrane chemical resistance. Experiments show that the coating has no change, indicates the type of crosslinker crosslinked epoxy powder coating has good chemical resistance, and can meet the requirements of industrial production.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Choice of filler. Light calcium carbonate, precipitated barium sulfate, talcum powder, such as epoxy powder coating can be used as a filler, in addition to have certain influence, stability, heat resistance, hardness, its main function is to reduce costs; But adding too much filler will reduce the physical mechanical properties of the coating.
The results of this experiment were 46% (relative to the percentage of resin).
Optimal formulation of epoxy powder coating. The crosslinking temperature is 130 degrees centigrade, and after a large number of experiments, the optimal formula is obtained by detecting all kinds of properties while achieving fast crosslinking.
The dynamic model obtained is a better description of the dynamic behavior of the carbon-synthesis dimethyl ether from C301 / p-al2o3.
Using C301 / P - Al2O3 as bifunctional catalyst, and the catalyst activity in the stable period, in the CO/H2 = 1.325, temperature 210 ~ 300 degrees Celsius, 2 ~ 4.3 MPa pressure, space velocity, 600 ~ 1800 ml/g (h % catalyst) conditions, obtained the carbon-rich syngas Intrinsic kinetics equation of preparing dimethyl ether and methanol synthesis r1 = k1PCOPH2 (1, 1) (1 + + KCO2PCO2 KCOPCO) (1 + K0.5 H2P0. 5 H2 + KWPW); Methanol dehydration r2 = k2P1. 5 M (1-2) (1 + K0.5 MP0.5 M + KH2OPH2O) 2; The water vapor transform r3 = k3PCOPW (1-3) (1 + KCOPCO + KCO2PCO2) (1 + P0.5 h2kw).
By carbon-rich syngas in C301 / P - Al2O3 catalyst in preparing dimethyl ether dynamics research, for methanol synthesis and methanol dehydration and water vapor transformation of three independent reaction apparent activation energy were 88.43, 42.56 and 11.92 kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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