Ion liquid modified polyurethane coating and preparation method thereof
A polyurethane coating and ionic liquid technology, applied in the field of coatings, can solve the problems of poor antistatic effect, poor chemical stability, poor dispersibility, etc., and achieve easy popularization, good antistatic effect, and chemical stability. Good results
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Embodiment 1
[0025] Step 1. Add 47g of 1-vinylimidazole into a round bottom flask, put 62g of bromoethanol in a constant pressure dropping funnel, slowly add it dropwise into the round bottom flask, and slowly raise the temperature to 45°C. The reaction was continued at 45°C for 1 h, during which the liquid gradually disappeared and a brown solid appeared. After the reaction, wash with diethyl ether and ethyl acetate respectively to finally obtain 106 g of light yellow solid powder. A polymerizable hydroxyl-functional ionic liquid is obtained.
[0026] Step 2. Add 50g of 3-hydroxyethyl-1-vinylimidazolium bromide into the round bottom flask, add 50mL of water to dissolve it completely, then add 29g of potassium tetrafluoroborate, react at 30°C for 6h, remove part of the water, A large amount of solid precipitated out. Wash with deionized water and ethyl acetate respectively to obtain 48 g of light yellow solid powder.
[0027] Step 3. Add 48g of 3-hydroxyethyl-1-vinylimidazolium tetraflu...
Embodiment 2
[0030] Step 1. Add 47g of 1-vinylimidazole into the round bottom flask, put 55g of 3-chloro-1,2-propanediol in the constant pressure dropping funnel, slowly drop into the round bottom flask, and slowly raise the temperature to 60°C . The reaction was continued at 70°C for 2h, during which the liquid gradually disappeared and a khaki solid appeared. After the reaction, wash with diethyl ether and ethyl acetate respectively to finally obtain 100 g of light yellow solid powder. A polymerizable hydroxyl-functional ionic liquid is obtained.
[0031] Step 2. Add 50g of propylene glycol-1-vinylimidazolium chloride salt into the round bottom flask, add 50mL of water to dissolve it completely, then add 31g of potassium tetrafluoroborate, react at 40°C for 6h, remove part of the water, and there are a lot of solids Precipitate. Wash with deionized water and ethyl acetate respectively to obtain 57 g of light yellow solid powder.
[0032] Step 3. Add 57g of propylene glycol-1-vinylimi...
Embodiment 3
[0035] Step 1. Add 47g of 1-vinylimidazole to a round bottom flask, place 109g of 2-chloro-1,4-butanediol in a constant pressure dropping funnel, slowly add it dropwise to the round bottom flask, and slowly heat up to 70°C. The reaction was continued at 70°C for 2h, during which the liquid gradually disappeared and a gray solid appeared. After the reaction, wash with diethyl ether and ethyl acetate respectively to finally obtain 100 g of light yellow solid powder. A polymerizable hydroxyl-functional ionic liquid is obtained.
[0036] Step 2. Add 50 g of butanediol-1-vinylimidazolium chloride into a round bottom flask, add 30 mL of water to dissolve it completely, and add 0.75 g of azobisisobutyronitrile after heating up to 80°C. Then react at 80°C for 10h. After the reaction is finished, a large amount of solid powder will be precipitated. Cool, filter with suction, wash the filtered dark yellow solid powder with water, 40g.
[0037] Step 3. Disperse 40g of hydroxyl funct...
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