Amido containing polyaspartate and preparation method thereof
A technology of amido-containing polyaspartic acid ester and aspartic acid ester, which is applied in the field of amido-containing polyaspartic acid ester and its preparation, can solve the problem of long synthesis time, low conversion rate, and inability to supply timely goods and other issues, to achieve the effect of improving the construction period and its application fields, broad prospects for industrialization, and expanding the scope of application
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Embodiment 1
[0029] Add 105 g (0.5 mol) of 4,4'-diaminocyclohexylmethane into a four-necked flask equipped with a stirrer, a heating device, an addition funnel, and a nitrogen inlet, protect it with nitrogen, raise the temperature to 80°C, and dissolve 172 g (1.0 mol) diethyl maleate was dropped into the four-neck flask through the addition funnel at a constant speed within 3 hours. After the addition was complete, the reaction was incubated for 24 hours. At this point 97% of the 4,4'-diaminocyclohexylmethane was converted to polyaspartate. Add 7.3 grams (0.05 mol) of adipic acid to the four-necked flask at one time, raise the temperature to 180°C and keep it for 1 hour, and when it is cooled to 110°C, vacuumize and dehydrate it under the condition of negative pressure of 0.05MPa for 1 hour, and obtain transparent, shallow Yellow liquid, the reaction is 100% complete.
Embodiment 2
[0031]Add 119 g (0.5 mol) of 3,3'-dimethyl-4,4'-diaminocyclohexylmethane into a four-necked flask equipped with a stirrer, a heating device, an addition funnel, and a nitrogen inlet, and pass nitrogen protection , the temperature was raised to 100°C, and 228.28 g (1.0 mol) of dibutyl maleate was dropped into the four-neck flask through the addition funnel at a constant speed within 3 hours. After the addition was complete, the reaction was incubated for 24 hours. At this point 86% of the 3,3'-dimethyl-4,4'-diaminocyclohexylmethane was converted to polyaspartate. Add 11.81 g (0.1 mol) of succinic acid to the four-neck flask at one time, raise the temperature to 180°C and keep it for 1 hour, and when it is cooled to 110°C, vacuumize and dehydrate it under the condition of negative pressure of 0.05MPa for 1 hour to obtain transparent, shallow Yellow liquid, the reaction is 100% complete.
Embodiment 3
[0033] Add 115 g (0.5 mol) of polyetheramine D-230 into a four-neck flask equipped with a stirrer, a heating device, an addition funnel and a nitrogen inlet, protect it with nitrogen, raise the temperature to 90 ° C, and dissolve 172 g (1.0 mol) Diethyl fumarate was dropped into the four-neck flask through the addition funnel at a constant speed within 3 hours. After the addition was complete, the reaction was incubated for 24 hours. At this point 88% of the polyetheramine D-230 was converted to polyaspartate. Add 23.12 (0.15mol) grams of hexahydrophthalic anhydride to the four-necked flask at one time, raise the temperature to 180°C and keep it for 1 hour. Yellow liquid, the reaction is 100% complete.
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Abstract
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