A kind of preparation method of polyurethane type amphoteric surfactant
A surfactant and polyurethane technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problems of long reaction time, few reports of amphoteric polyurethane surfactants, and comparatively few reports of single ionic polyurethane surfactants. many problems, to achieve the effect of short reaction time, improved spreading and adsorption performance, and excellent emulsifying power
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Embodiment 1
[0035] Dehydrate 79.5g of stearylamine polyoxyethylene ether (30) at 110°C and a vacuum of 0.09MPa for 1 hour, then add it into a four-neck flask equipped with a thermometer, a stirring bar, a reflux tube for condensation and a nitrogen inlet, and then Add 37.5g of diphenylmethane diisocyanate (MDI) and 234g of acetone (solvent) to the four-necked flask under the protection of nitrogen, then heat and raise the temperature to 75°C, then stir the reaction for 80min (-NCO content reaches 1.20%), then After cooling down to 70°C, add 7.2g of 1,4-butanediol (BDO) into the four-necked flask, and then keep it warm for 65 minutes for chain extension, and then add 59g of 10% monochloroacetic acid dropwise into the four-necked flask Sodium aqueous solution, then react for 40min, then cool to 25°C and then distill under reduced pressure (45°C, 0.035MPa) to remove acetone, then add 250.5g of deionized water at one time to adjust the solid content of the system to 30% (wt%) to obtain polyure...
Embodiment 2
[0037]Dehydrate a mixture of 15.6g of dodecylamine polyoxyethylene ether (10) and 17.7g of stearylamine polyoxyethylene ether (10) at 115°C and a vacuum of 0.09MPa for 1 hour, and then add , a stirring rod, a condensing reflux tube and a four-necked flask with nitrogen inlet, and then add 21.8g of toluene diisocyanate (TDI), 0.2g of diisobutyltin dilaurate and 111g of acetone (solvent ), then heated and raised to 80°C, then stirred and reacted for 90min (-NCO content reached 1.52%), then cooled down to 65°C, then added 3.7g of ethylene glycol into the four-necked flask, and then kept the reaction for 60min for chain extension, Then add 59g of 10% sodium monochloroacetate aqueous solution dropwise to the four-neck flask, react for 50min, then cool to 28°C, then distill under reduced pressure (45°C, 0.035MPa) to remove acetone, and then add 141.6 g of ionized water was used to adjust the solid content of the system to 25% (wt%) to obtain a polyurethane type amphoteric surfactant...
Embodiment 3
[0039] Dehydrate 32.0g of cocoamine polyoxyethylene ether (10) at 110-120°C and a vacuum of 0.09MPa for 1 hour, then add it into a four-neck flask equipped with a thermometer, a stirring rod, a reflux pipe and a nitrogen inlet, and then Add 38.9g of isophorone diisocyanate (IPDI), 0.3g of stannous octoate and 143g of acetone (solvent) into the four-neck flask under nitrogen protection, then heat and raise the temperature to 78°C, then stir the reaction for 75min (—NCO content up to 2.46%), then lowered the temperature to 63°C, then added 11.8g of hexanediol into the four-necked flask, and then kept the temperature for 80min for chain extension, and then added dropwise 92.5g of 10% 2 -Aqueous solution of sodium chloroethylsulfonate, then react for 60min, then cool to 27°C, then distill under reduced pressure (45°C, 0.035MPa) to remove acetone, then add 154g of water to adjust the solid content of the system to 28% (wt%) to obtain polyurethane type Amphoteric surfactant (sample ...
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