Composite coating containing triblock silicon-fluorine polymer and production method for composite coating
A composite coating and polymer technology, applied in the direction of coating, etc., can solve the problems of poor compatibility, precipitation of fluorine-containing polymers, poor adhesion of fluorine-containing polymers, etc., to improve compatibility and hydrophobicity , Improve the effect of adhesion
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Embodiment 1
[0056] (1) Tri-block silicon fluoropolymer:
[0057] ① Add 100g of hexafluorobutyl acrylate monomer, 20g of ethyl 2-bromoisobutyrate, 500g of toluene and 50g of 2,2'-bipyridine into a three-necked flask equipped with a high-speed stirrer, a thermometer and a condenser, and mix well , through ice-salt bath (add 20g CaCl to 100g crushed ice 2 ﹒ 6H 2 O, stir evenly, the temperature is -4°C, the operation of the following ice-salt bath is the same as described here. ) freezing, vacuuming, blowing nitrogen for 3 times, heating up to 120°C under the protection of nitrogen, adding 50g of cuprous bromide, and continuing to pass nitrogen, the reaction time is 4h, and the polyhexafluorobutyl acrylate macromolecular initiator is obtained;
[0058] ②Mix 100g of methyl methacrylate, 300g of polyhexafluorobutyl acrylate macroinitiator, 0.1g of triphenylphosphine and 500g of butanone, freeze in ice-salt bath, vacuumize and blow nitrogen 3 times to remove oxygen, Then, under the protectio...
Embodiment 2
[0065] (1) Tri-block silicon fluoropolymer:
[0066] 1. Add 100g of trifluoroethyl methacrylate monomer, 0.2g of bromide, 200g of butanone, and 0.1g of triphenylphosphine into a three-necked flask with a high-speed stirrer, a thermometer, and a condenser tube, mix well, Freeze in a salt bath, evacuate, blow nitrogen three times, heat up to 80°C under the protection of nitrogen, add 0.1 g of ferrous chloride, continue to pass nitrogen, and the reaction time is 25 hours to obtain polytrifluoroethyl methacrylate macromolecular trigger agent;
[0067] ②Hydroxyethyl methacrylate 100g, polytrifluoroethyl methacrylate macroinitiator 50g, N,N,N′,N″,N″-pentamethyl-diethylenetriamine (PMDETA) 50g Mix evenly, freeze in an ice-salt bath, vacuumize, blow nitrogen 3 times to remove oxygen, then raise the temperature to 120°C under the protection of nitrogen, add 50 g of ferrous chloride and react for 25 hours to obtain a fluorine-containing acrylate diblock initiator;
[0068] ③ Mix 100g ...
Embodiment 3
[0074] (1) Tri-block silicon fluoropolymer:
[0075] ① Add 100g of dodecafluoroheptyl methacrylate monomer, 1.95g of benzenesulfonyl chloride, and 5g of triphenylphosphine into a three-necked flask equipped with a high-speed stirrer, a thermometer, and a condenser, mix well, and freeze in an ice-salt bath. Vacuumize, blow nitrogen 3 times, heat up to 80°C under the protection of nitrogen, add 3g of ferrous chloride, continue to pass nitrogen, and the reaction time is 1.5h, to obtain polydodecafluoroheptyl methacrylate macromolecular initiator;
[0076] ② 100g of isobutyl acrylate, 100g of polydodecafluoroheptyl methacrylate macroinitiator, 30g of N,N,N′,N″,N″-pentamethyl-diethylenetriamine, 1,4 - Mix 400g of dioxane evenly, freeze in an ice-salt bath, vacuumize and blow nitrogen 3 times to remove oxygen, then raise the temperature to 100°C under the protection of nitrogen, add 40g of ferrous chloride and react for 20h to obtain fluorine-containing acrylate diblock initiator; ...
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