Fluorinated isocyanate and method for preparing fluorinated isocyanate-acrylate copolymer emulsion
A technology for isocyanate and isocyanate is applied in the field of new fluorinated isocyanate monomers, which can solve the problems of poor monomer compatibility, poor stability, and complicated operation, and achieve the effect of stable reaction system, good stability, and easy reaction
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Embodiment 1
[0061] In Example 1, vinyl-containing fluorinated isocyanate monomers were prepared by sequentially reacting toluene diisocyanate (TDI) with hexafluorobutanol (HFB) and hydroxyethyl methacrylate (HEMA).
[0062] Wherein, the molar ratio of TDI, HFB and HEMA is 2:1:1.2.
[0063] With butyl acetate as solvent, its consumption is 40wt% based on reactant total amount;
[0064] The consumption of catalyst (DBT) is based on 0.3wt% of reactant total amount;
[0065] The amount of polymerization inhibitor (hydroquinone) is based on 0.1wt% of the total amount of reactants.
[0066] like figure 1 As shown, a four-necked bottle 2 equipped with a thermometer 4, a condensation tube 5 and an electric stirrer 3 is placed in the oil bath 1, and an A dropping funnel is installed on the first bottle mouth 2A (for dropping and initiating agent aqueous solution), a B dropping funnel (for dropping the pre-emulsion of the monomer mixture) is installed on the fourth bottle mouth 2D.
[0067]The ...
Embodiment 2
[0078] In Example 2, vinyl-containing fluorinated isocyanate monomers were prepared by reacting toluene diisocyanate (TDI) sequentially with dodecafluoroheptanol (DFH) and hydroxyethyl methacrylate (HEMA).
[0079] Wherein, the molar ratio of TDI, DFH and HEMA is 2:1:1.2.
[0080] With xylene as solvent, its consumption is 60wt% based on reactant total amount;
[0081] Taking zinc naphthenate as a catalyst, its consumption is based on 0.5wt% of the total amount of reactants;
[0082] The amount of polymerization inhibitor (hydroquinone) is based on 0.1wt% of the total amount of reactants.
[0083] like figure 1 As shown, a four-necked bottle 2 equipped with a thermometer 4, a condensation tube 5 and an electric stirrer 3 is placed in the oil bath 1, and an A dropping funnel is installed on the first bottle mouth 2A (for dropping and initiating agent aqueous solution), a B dropping funnel (for dropping the pre-emulsion of the monomer mixture) is installed on the fourth bottl...
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