Boron-containing polyethylene glycol fatty acid ester surfactant
A surfactant, polyethylene glycol technology, applied in the directions of dissolution, chemical instruments and methods, chemical/physical processes, etc., to achieve good emulsification performance, improve esterification rate, and reduce surface tension.
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[0014] Embodiment 1, the esterification reaction of boronic acid and PEG
[0015] The molar ratio of 10g PEG-600 and 350mg boric acid is 3:1 and put into the three-necked flask, install electric stirrer, water separator, thermometer and reflux condenser, add 0.8% terephthalic acid, 100mL of xylene with water agent , refluxed at 140 ° C for 2 h, distilled under reduced pressure to remove water and xylene, and dried to obtain polyethylene glycol borate.
[0016] Embodiment 1, the esterification reaction of boric acid-PEG and fatty acid
[0017] Weigh 5g of polyethylene glycol borate, react with 2g of palmitic acid in a molar ratio of 1:3, the catalyst sodium hydrogen sulfate monohydrate (0.8% of the total mass) and xylene with water agent are put into the installation of electric stirrer , a water separator, a thermometer and a three-necked flask with a reflux condenser, reflux reaction at 140 ° C for 5h, after the reaction, filter to remove the catalyst, and vacuum distillatio...
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