A kind of perfluoropolyether surfactant and preparation method thereof
A technology of surfactant and perfluoropolyether, which is applied in chemical instruments and methods, fire prevention equipment, transportation and packaging, etc., can solve the problems of low yield and environmental pollution, achieve high conversion rate, simple equipment requirements, energy The effect of low consumption
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Embodiment 1
[0067] Add 2.0 moles of perfluoropolyether sulfonyl fluoride and 0.006 moles of aluminum isopropoxide into a 20L reaction kettle with reflux stirring and heating and heat preservation devices, and add 2.6 moles of N,N dimethyl propane in batches under stirring amine, and the temperature rises slowly, the system temperature does not exceed 100°C, react for 6 hours, cool to room temperature, a small amount of hydrogen fluoride gas generated during the process is introduced into the lye pool for absorption through the upper port of the condenser tube.
[0068] Add the pre-prepared 2.6 mol concentration of 20% sodium chloroacetate aqueous solution into the above system of the reaction kettle, and reflux for 1.5 hours to obtain a dark yellow liquid. Cool to room temperature, wherein a small amount of quaternary ammonium salt by-product is also a good surfactant, the obtained substance does not need to be separated, marked as sample 1, and is ready for use.
Embodiment 2
[0070] As in the method described in Example 1, the difference is that aluminum isopropoxide is 0.006 moles, N,N dimethylpropylenediamine consumption is 2.6 moles, the reaction temperature is 110 DEG C, and the sodium chloroacetate consumption is also during the quaternization reaction. 2.6 moles, made into a 20% aqueous solution, refluxed for 2 hours, marked as sample 2, and set aside.
Embodiment 3
[0072] As in the method described in Example 1, the difference is that the catalyst is selected as 0.008 moles of potassium tert-butoxide, the amount of N,N dimethylpropylenediamine is 2.8 moles, the reaction temperature is 115 ° C, and the reaction is 7 hours, the quaternization reaction The amount of sodium chloroacetate was also 2.8 moles, which was mixed with a 30% aqueous solution, refluxed for 2 hours, marked as sample 3, and set aside.
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