News Details
Polyether self-emulsifying waterborne epoxy paint crosslinking agent
2017-7-24 16:51:16
Polyether self-emulsifying waterborne epoxy paint crosslinking agent
Under the reaction conditions of non-volatile organic acids, the synthesized polyethers self-emulsified aqueous epoxy crosslinking agent has a good emulsified liquid epoxy resin at room temperature.
By the preparation of polyether type emulsified waterborne epoxy crosslinking agent prepared with EPON828 two-component water-borne epoxy coating crosslinked at room temperature after got the good performance of coating, has good flexibility and impact resistance, without adding plasticizer and toughening agent under the condition of improved epoxy crosslinking performance after the defects of brittle.
Process qualification verification. In order to confirm the condition of single factor experiment determined the reliability of the process conditions, the reaction temperature is 65 ℃, reaction time is 3 h conditions, according to the stoichiometric ratio drops add EPON828 to after vacuum distillation to remove TETA TETA - DGEPG adduct of propylene glycol methyl ether in the solution, and synthesis of 3 batches of product, its synthesis process stability, EPON828 epoxy conversion rate of 97.1% on average.
The properties of the synthesized non-ionic water-based epoxy crosslinking agent. Water solubility: comparing TETA, DGEPG, TETA - DGEPG addition and TETA - dgepg-epon828 addition in distilled water.
Compared with reactants TETA and dgepgs, the solubility of TETA - dgepgs in intermediates changed, which proved that TETA and DGEPG reaction occurred. EPON828 is insoluble in water, and the resulting product after reaction with teta-dgepg addition can form a transparent solution in the water. It also shows the reaction between EPON828 and teta-dgeg addition.
Chinese name: Diethyl toluene diamine(DETDA)
Under the reaction conditions of non-volatile organic acids, the synthesized polyethers self-emulsified aqueous epoxy crosslinking agent has a good emulsified liquid epoxy resin at room temperature.
By the preparation of polyether type emulsified waterborne epoxy crosslinking agent prepared with EPON828 two-component water-borne epoxy coating crosslinked at room temperature after got the good performance of coating, has good flexibility and impact resistance, without adding plasticizer and toughening agent under the condition of improved epoxy crosslinking performance after the defects of brittle.
Process qualification verification. In order to confirm the condition of single factor experiment determined the reliability of the process conditions, the reaction temperature is 65 ℃, reaction time is 3 h conditions, according to the stoichiometric ratio drops add EPON828 to after vacuum distillation to remove TETA TETA - DGEPG adduct of propylene glycol methyl ether in the solution, and synthesis of 3 batches of product, its synthesis process stability, EPON828 epoxy conversion rate of 97.1% on average.
The properties of the synthesized non-ionic water-based epoxy crosslinking agent. Water solubility: comparing TETA, DGEPG, TETA - DGEPG addition and TETA - dgepg-epon828 addition in distilled water.
Compared with reactants TETA and dgepgs, the solubility of TETA - dgepgs in intermediates changed, which proved that TETA and DGEPG reaction occurred. EPON828 is insoluble in water, and the resulting product after reaction with teta-dgepg addition can form a transparent solution in the water. It also shows the reaction between EPON828 and teta-dgeg addition.
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).
In the infrared spectrum, 1110 cm? 1 showed the strong and wide polyether characteristic peak of the dgepgs, while the characteristic peak of its epoxy-base (908 cm? 1) disappeared, indicating that there was a reaction between the PPG and TETA, and the other was 1577 cm? 1, 1509 cm? 1, 1459 cm? In 1, there is a skeleton vibration absorption peak of benzene ring in epoxy resin, and 829 cm? 1 and 770 cm? The two peaks in one place show that the benzene ring is the opposite of the benzene ring, while the epoxy base of the epoxy base (910 cm? 1) is basically disappearing, which also indicates that the EPON828 has reacted with teta-dgepg addition.
The physicochemical properties of waterborne epoxy crosslinking agent. Will synthesize TETA DGEPG - EPON828 adduct vacuum distillation to remove most of the PM after, in 50 ~ 60 ℃ temperature range, add distilled water to dilute the solid content is 50% ~ 55%, and continue to stir 1 h, the resulting physicochemical properties of waterborne epoxy crosslinking agent as shown in table 2, the viscosity is under 25 ℃ by Brookfield viscosity meter rotor in 60 4 r? Min? The condition is measured.
In material mole ratio (TETA/DGEPG) at 2.2/1, reaction temperature is 65 ℃, the reaction time of 4.0 h, under the condition of TETA in DGEPG extender chain reaction synthesis of TETA - DGEPG adduct; The reaction temperature is 65 ℃, reaction time is 3 h, according to the stoichiometric ratio of TETA - DGEPG adduct with EPON828 chain extension reaction, synthesis of TETA DGEPG - EPON828 adduct.
The tensile shear strength was determined by GB/t7124-2008 in CMT4104 universal material experimental machine, tensile speed: 10mm/min, tensile shear strength was 8.9 MPa.
The determination of the storage period. Crosslinking agent with E - 51 epoxy resin in mass ratio of 1:2, epoxy resin adhesive system (GB/T7123.2-2002, observed at room temperature (25 ℃) stored under the different times of viscosity, the changes of maneuverability and the crosslinking system
The latent cross-linking system was not significantly increased after 90 days, indicating that the storage period was over three months.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
In the infrared spectrum, 1110 cm? 1 showed the strong and wide polyether characteristic peak of the dgepgs, while the characteristic peak of its epoxy-base (908 cm? 1) disappeared, indicating that there was a reaction between the PPG and TETA, and the other was 1577 cm? 1, 1509 cm? 1, 1459 cm? In 1, there is a skeleton vibration absorption peak of benzene ring in epoxy resin, and 829 cm? 1 and 770 cm? The two peaks in one place show that the benzene ring is the opposite of the benzene ring, while the epoxy base of the epoxy base (910 cm? 1) is basically disappearing, which also indicates that the EPON828 has reacted with teta-dgepg addition.
The physicochemical properties of waterborne epoxy crosslinking agent. Will synthesize TETA DGEPG - EPON828 adduct vacuum distillation to remove most of the PM after, in 50 ~ 60 ℃ temperature range, add distilled water to dilute the solid content is 50% ~ 55%, and continue to stir 1 h, the resulting physicochemical properties of waterborne epoxy crosslinking agent as shown in table 2, the viscosity is under 25 ℃ by Brookfield viscosity meter rotor in 60 4 r? Min? The condition is measured.
In material mole ratio (TETA/DGEPG) at 2.2/1, reaction temperature is 65 ℃, the reaction time of 4.0 h, under the condition of TETA in DGEPG extender chain reaction synthesis of TETA - DGEPG adduct; The reaction temperature is 65 ℃, reaction time is 3 h, according to the stoichiometric ratio of TETA - DGEPG adduct with EPON828 chain extension reaction, synthesis of TETA DGEPG - EPON828 adduct.
The tensile shear strength was determined by GB/t7124-2008 in CMT4104 universal material experimental machine, tensile speed: 10mm/min, tensile shear strength was 8.9 MPa.
The determination of the storage period. Crosslinking agent with E - 51 epoxy resin in mass ratio of 1:2, epoxy resin adhesive system (GB/T7123.2-2002, observed at room temperature (25 ℃) stored under the different times of viscosity, the changes of maneuverability and the crosslinking system
The latent cross-linking system was not significantly increased after 90 days, indicating that the storage period was over three months.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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