A kind of sulfamate-modified isocyanate trimer and preparation method thereof
A technology of isocyanate trimerization and sulfamate, which is applied in the direction of polyurea/polyurethane coatings, coatings, organic chemistry, etc., can solve problems such as isocyanate trimers that have not been seen yet, achieve good application prospects, simple preparation process, Effect of improving tensile strength and elongation at break
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Embodiment 1
[0027] (1) Add deionized water and dibutyltin dilaurate to the three-necked flask, and use two dropping funnels to add 1,4-butane sultone and ethylenediamine to the three-necked flask at a molar ratio of 1:1, respectively. Add dropwise in the middle, adjust the dropping rate, control the dropwise addition within one hour, use the magnetic rotor to rotate and stir during the whole reaction process, and the reaction temperature is maintained at 85°C. After the dropwise addition, the stirring was continued for 1 h to obtain sodium N-(2-aminoethyl)-aminobutanesulfonate (AABS) in the form of a yellow transparent liquid. After the reaction, the product was cooled to room temperature, and then neutralized with 25% sodium hydroxide solution to form a salt. The product was washed three times with acetone to remove unreacted monomer, water and impurities. Most of the acetone remaining in the product was removed using a rotary evaporator. Finally, the product was placed in a vacuum dry...
Embodiment 2
[0031] (1) Add deionized water and dibutyltin diacetate to the three-necked flask, and use two dropping funnels to add 1,4-butane sultone and ethylenediamine to the three-necked flask at a molar ratio of 1:3 respectively. Add drop by drop, adjust the drop rate, control the dropwise addition within one hour, and use a magnetic rotor to rotate and stir during the entire reaction process, and the reaction temperature is maintained at 60°C. After the dropwise addition, the stirring was continued for another 2 h to obtain sodium N-(2-aminoethyl)-aminobutane sulfonate (AABS) in the form of a yellow transparent liquid. After the reaction, the product was cooled to room temperature, and then neutralized with 25% sodium hydroxide solution to form a salt. The product was washed three times with acetone to remove unreacted monomer, water and impurities. Most of the acetone remaining in the product was removed using a rotary evaporator. Finally, the product was placed in a vacuum drying...
Embodiment 3
[0035] (1) Add deionized water and dibutyltin maleate to the three-necked flask, and use two dropping funnels to add 1,4-butane sultone and ethylenediamine to the three-necked flask at a molar ratio of 1:4 respectively. Add dropwise in the medium, adjust the dropping speed, control the dropwise addition within one hour, use the magnetic rotor to rotate and stir during the whole reaction process, and the reaction temperature is maintained at 55°C. After the dropwise addition, the stirring was continued for another 3 h to obtain sodium N-(2-aminoethyl)-aminobutanesulfonate (AABS) in the form of a yellow transparent liquid. After the reaction, the product was cooled to room temperature, and then neutralized with 25% sodium hydroxide solution to form a salt. The product was washed three times with acetone to remove unreacted monomer, water and impurities. Most of the acetone remaining in the product was removed using a rotary evaporator. Finally, the product was placed in a vacu...
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Abstract
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