Single-component antifouling corrosion-resistant coating and preparation method thereof
A corrosion-resistant, one-component technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, polyester coatings, etc., can solve the problem of poor waterproof and anti-corrosion coatings, compatibility of chlorinated paraffin and epoxy coating components Insufficient stability and other problems, to meet the requirements of industrial production, improve stability and durability, and achieve the effect of high purity
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Embodiment 1
[0038] (1) Preparation of carboxyl-containing chlorinated paraffin 42: Dissolve 20 g of chlorinated paraffin 42 in 200 mL of acetone, stir to dissolve, add 20 g of p-hydroxybenzoic acid and 30 g of potassium carbonate, and react at 55° C. for 30 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol, and the product was vacuum-dried at 100° C. for 5 h to obtain carboxyl-containing chlorinated paraffin 42.
[0039] (2) Preparation of chlorinated paraffin 42 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 42 to the reaction kettle, add 85mol phosphorus trichloride dropwise, stir and heat up to 50°C, react for 6h, cool to room temperature, and stand to separate Layer to obtain chlorinated paraffin 42 containing acid chloride.
[0040] (3) Preparation of hydroxyl-containing chlorinated paraffin 42: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriate amount of a...
Embodiment 2
[0046] (1) Preparation of carboxyl-containing chlorinated paraffin 52: Dissolve 20 g of chlorinated paraffin 52 in 250 mL of butanone, stir to dissolve, add 25 g of p-hydroxybenzoic acid and 28 g of potassium carbonate, and react at 80° C. for 10 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol, and the product was vacuum-dried at 100° C. for 8 hours to obtain carboxyl-containing chlorinated paraffin 52.
[0047] (2) Preparation of chlorinated paraffin 52 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 52 to the reaction kettle, add dropwise 85mol phosphorus trichloride, stir and heat up to 70°C, react for 4h, cool to room temperature, let stand to separate layer to obtain the chlorinated paraffin 52 containing the acid chloride.
[0048] (3) Preparation of hydroxyl-containing chlorinated paraffin 52: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriat...
Embodiment 3
[0054] (1) Preparation of carboxyl-containing chlorinated paraffin 70: Dissolve 20 g of chlorinated paraffin 70 in 250 mL of butanone, stir to dissolve, add 25 g of p-hydroxybenzoic acid and 28 g of potassium carbonate, and react at 65° C. for 24 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol. The product was vacuum-dried at 100°C for 8 hours to obtain carboxyl-containing chlorinated paraffin 70.
[0055] (2) Preparation of chlorinated paraffin 70 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 70 to the reaction kettle, add dropwise 85mol phosphorus trichloride, stir and heat up to 60°C, react for 5h, cool to room temperature, and stand to separate layer to obtain chlorinated paraffin 70 containing acid chloride.
[0056] (3) Preparation of hydroxyl-containing chlorinated paraffin 70: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriate amount of ac...
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