News Details
Thiourea modified ethylene triamine paint crosslinking agent
2017-7-25 16:02:08
Thiourea modified ethylene triamine paint crosslinking agent
With thiourea modified divinyl three amine is used as the crosslinking agent, the epoxy resin by thiourea modified divinyl three amine crosslinking agent of contact Angle and epoxy/thiourea modified divinyl three amine system completely crosslinking time measurement and infrared spectrum analysis of crosslinking agent, the ratio of raw materials, synthesis, reaction temperature and time were studied on the influence of the crosslinking agent.
Results show that when divinyl three amine and thiourea mass ratio is 3.13 ~ 3.30:1, the synthetic reaction temperature for 80 + 5 ℃, the reaction time was 1.2 ~ 1.4 h, can be obtained to 12 ℃ within 24 h under completely crosslinked epoxy crosslinking agent.
Epoxy resin is widely used in high and high technology, industrial and civilian products with its excellent properties. Currently, the commonly used epoxy resin crosslinking system mainly includes epoxy resin - aliphatic polyamine system and epoxy resin - polyamide system.
The reaction of the epoxy resin-fatty polyamine system is fast, but the product has low toughness, high toxicity and strong stimulation, which can have adverse effects on human and environment. However, the epoxy resin - polyamide system has good toughness and low toxicity, but the gel time is longer.
Therefore, it is important to study and prepare new epoxy resin crosslinking agent that can crosslink epoxy resin on wet surface and water and improve the brittleness of resin and crosslinking at low temperature.
In this paper, the modified thiourea divinyl three amine process for preparation of epoxy crosslinking agent was studied, based on the contact Angle of crosslinking agent and infrared spectrum analysis to study the synthesis reaction time, reaction temperature and monomer mixture ratio on the influence of crosslinking agent performance, and low temperature crosslinking agent was studied with epoxy cross-linking.
Experimental raw materials and instrument diethylene triamine (AR); E-44 type epoxy resin; Thiourea (AR). JC2000D2 contact Angle measuring instrument; Nicolet5700 Fourier infrared spectrometer.
Chinese name: Diethyl toluene diamine(DETDA)
With thiourea modified divinyl three amine is used as the crosslinking agent, the epoxy resin by thiourea modified divinyl three amine crosslinking agent of contact Angle and epoxy/thiourea modified divinyl three amine system completely crosslinking time measurement and infrared spectrum analysis of crosslinking agent, the ratio of raw materials, synthesis, reaction temperature and time were studied on the influence of the crosslinking agent.
Results show that when divinyl three amine and thiourea mass ratio is 3.13 ~ 3.30:1, the synthetic reaction temperature for 80 + 5 ℃, the reaction time was 1.2 ~ 1.4 h, can be obtained to 12 ℃ within 24 h under completely crosslinked epoxy crosslinking agent.
Epoxy resin is widely used in high and high technology, industrial and civilian products with its excellent properties. Currently, the commonly used epoxy resin crosslinking system mainly includes epoxy resin - aliphatic polyamine system and epoxy resin - polyamide system.
The reaction of the epoxy resin-fatty polyamine system is fast, but the product has low toughness, high toxicity and strong stimulation, which can have adverse effects on human and environment. However, the epoxy resin - polyamide system has good toughness and low toxicity, but the gel time is longer.
Therefore, it is important to study and prepare new epoxy resin crosslinking agent that can crosslink epoxy resin on wet surface and water and improve the brittleness of resin and crosslinking at low temperature.
In this paper, the modified thiourea divinyl three amine process for preparation of epoxy crosslinking agent was studied, based on the contact Angle of crosslinking agent and infrared spectrum analysis to study the synthesis reaction time, reaction temperature and monomer mixture ratio on the influence of crosslinking agent performance, and low temperature crosslinking agent was studied with epoxy cross-linking.
Experimental raw materials and instrument diethylene triamine (AR); E-44 type epoxy resin; Thiourea (AR). JC2000D2 contact Angle measuring instrument; Nicolet5700 Fourier infrared spectrometer.
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).
The experimental steps
1) accurately call thiourea and diethylenetriamine and pour into three 500mL flask at a time.
2) heating in water bath, heating up to the specified temperature, stirring at medium speed, and maintaining constant temperature during the specified time period (time for the synthesis time).
3) after the termination reaction, temperature, slow down to 50 ℃, continue to stir and constant temperature for 1 h.
4) stop heating and stirring, cooling to room temperature, discharging, numbering and sealing.
5) mix the prepared crosslinking agent with epoxy resin on the cardboard and mix uniformly, the mixture will be light yellow; The viscosity, drying time and yellowing variation of crosslinking agent and epoxy resin were observed.
6) will quickly into the mix mixture - 12 ℃ freezer of crosslinking, observe whether the initial setting after 1 h, and record the initial setting time. After 8h, observe every 0.5 h and record the complete crosslinking time.
7) were synthesized under the condition of different series of crosslinking agent, step 5 observations of experiment, the mixing uniform mixture of samples for initial setting time and full test crosslinking time, choose the better technological conditions of synthesis of crosslinking agent.
The contact Angle of contact Angle can reflect the performance of crosslinking agent and the performance of the crosslinking agent. This experiment is in 30 ℃, the crosslinking agent under the condition of the glass surface contact Angle measurement. To reduce the error, each measurement sample was measured three times, and then the average was asked.
Synthesis temperature on the influence of crosslinking agent performance through consulting a large number of literature, the reaction temperature range to 60 ~ 100 ℃, and the fixed time and monomer synthesized ingredients than synthetic experiments.
With the increase of temperature, contact Angle of crosslinking agent, increase with the decrease of the first 80 ℃ when the contact Angle, minimum by contact Angle measurement instrument principle, the crosslinking agent at this time the most easily spread out. So in 80 ℃ when the synthesis of crosslinking agent spreading performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The experimental steps
1) accurately call thiourea and diethylenetriamine and pour into three 500mL flask at a time.
2) heating in water bath, heating up to the specified temperature, stirring at medium speed, and maintaining constant temperature during the specified time period (time for the synthesis time).
3) after the termination reaction, temperature, slow down to 50 ℃, continue to stir and constant temperature for 1 h.
4) stop heating and stirring, cooling to room temperature, discharging, numbering and sealing.
5) mix the prepared crosslinking agent with epoxy resin on the cardboard and mix uniformly, the mixture will be light yellow; The viscosity, drying time and yellowing variation of crosslinking agent and epoxy resin were observed.
6) will quickly into the mix mixture - 12 ℃ freezer of crosslinking, observe whether the initial setting after 1 h, and record the initial setting time. After 8h, observe every 0.5 h and record the complete crosslinking time.
7) were synthesized under the condition of different series of crosslinking agent, step 5 observations of experiment, the mixing uniform mixture of samples for initial setting time and full test crosslinking time, choose the better technological conditions of synthesis of crosslinking agent.
The contact Angle of contact Angle can reflect the performance of crosslinking agent and the performance of the crosslinking agent. This experiment is in 30 ℃, the crosslinking agent under the condition of the glass surface contact Angle measurement. To reduce the error, each measurement sample was measured three times, and then the average was asked.
Synthesis temperature on the influence of crosslinking agent performance through consulting a large number of literature, the reaction temperature range to 60 ~ 100 ℃, and the fixed time and monomer synthesized ingredients than synthetic experiments.
With the increase of temperature, contact Angle of crosslinking agent, increase with the decrease of the first 80 ℃ when the contact Angle, minimum by contact Angle measurement instrument principle, the crosslinking agent at this time the most easily spread out. So in 80 ℃ when the synthesis of crosslinking agent spreading performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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