Mixed hydrophilic polyisocyanate curing agent
A polyisocyanate and curing agent technology, applied in the field of water-based polymer synthesis, can solve the problems of high cost, difficult condition control, complicated process, etc., and achieve the effects of less side reactions, simple operation and small particle size
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[0027] Example 1
[0028] Add 60.0g of hexamethylene diisocyanate trimer to a three-necked flask and blow in nitrogen; add 9.0g of polyethylene glycol monomethyl ether with a functionality of 0.998, and then raise the temperature to 75°C to fully react the contents of the container 5 Hours; then lower the temperature to 10°C, then slowly add 1.2g of sodium ethylenediaminoethanesulfonate, continue the reaction for 20 minutes; finally, when it reaches room temperature, stop the nitrogen gas, take out a mixed hydrophilic polyisocyanate curing Agent.
[0029] The calculated -NCO content of the obtained mixed hydrophilic polyisocyanate curing agent is 15.9%; the tested viscosity is 47.1 mPa·s; the tested average particle size is 277.7 nm.
[0030] Perform infrared test on the obtained mixed hydrophilic polyisocyanate curing agent, figure 1 Its infrared spectrum, 2273cm -1 Where is -NCO, 1106cm -1 Ether bond absorption peak at, where -SO 3 - The symmetrical and asymmetrical stretching vib...
Example Embodiment
[0031] Example 2
[0032] Add 70.0g of hexamethylene diisocyanate trimer to a three-necked flask and blow in nitrogen; add 3.5g of polyethylene glycol monomethyl ether with a functionality of 0.997, and then heat to 70°C to allow the contents of the container to fully react 5 Hours; then lower the temperature to 0°C, then slowly add 1.4g of sodium ethylenediaminoethanesulfonate, continue the reaction for 30 minutes; finally, when it reaches room temperature, stop the nitrogen gas, take it out to obtain a mixed hydrophilic polyisocyanate curing Agent.
[0033] The calculated -NCO content of the obtained mixed hydrophilic polyisocyanate curing agent was 18.0%; the tested viscosity was 47.5 mPa·s; the tested average particle size was 260.2 nm.
[0034] Infrared test of the obtained mixed hydrophilic polyisocyanate curing agent, 2273cm -1 Where is -NCO, 1106cm -1 Ether bond absorption peak at, where -SO 3- The symmetrical and asymmetrical stretching vibration peaks are located at 1091cm...
Example Embodiment
[0035] Example 3
[0036] Add 70.0g of hexamethylene diisocyanate trimer to a three-necked flask, and pour into nitrogen; add 7.0g of polyethylene glycol monomethyl ether with a functionality of 0.998, and then increase the temperature to 75°C to allow the contents of the container to fully react 5 Hours; then lower the temperature to 20°C, then slowly add 0.7g of sodium ethylenediaminoethanesulfonate, continue the reaction for 15 minutes; finally, when it reaches room temperature, stop the nitrogen gas, take out a mixed hydrophilic polyisocyanate curing Agent.
[0037] The calculated -NCO content of the obtained mixed hydrophilic polyisocyanate curing agent was 17.3%; the tested viscosity was 51.3 mPa·s; the tested average particle size was 248.3 nm.
[0038] Infrared test of the obtained mixed hydrophilic polyisocyanate curing agent, 2273cm -1 Where is -NCO, 1106cm -1 Ether bond absorption peak at, where -SO 3 - The symmetrical and asymmetrical stretching vibration peaks are locat...
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