Environment-friendly waterborne glass paint and preparation method thereof
A glass coating, water-based technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as nitrogen oxide pollution, inability to work, close operator allergic reactions, etc., and achieve the effect of improving degradation performance and water resistance
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Embodiment 1
[0067] Preparation of water-based nitrocellulose emulsion:
[0068] (1) Add 12g of isophorone diisocyanate (IPDI), 8.64g of polyethylene glycol 400, and 15g of acetone into a three-necked flask equipped with a stirrer and a reflux condenser, and continue stirring at 70°C for 2 hours;
[0069] (2) Add 12.96g polyethylene glycol 4000 and 19.44g epoxy resin E-42 to the product in step (1), add 14.74g nitrocellulose and 1g dioctyltin dilaurate into the system through methyl ethyl ketone dissolution, Raise the temperature to 80°C and keep it warm for 1h; then raise the temperature to 85°C for 3h at a constant temperature;
[0070] (3) Distill the organic solvent from the reaction solution obtained in step (2) under reduced pressure, lower the temperature to 50°C, add 150 mL of distilled water or deionized water dropwise within 20 minutes, and at the same time stir rapidly at 700-800 r / mi, and emulsify to obtain a water-based nitrocellulose emulsion .
Embodiment 2
[0072] (1) add 12g toluene diisocyanate (TDI) in the there-necked flask that agitator and reflux condenser are housed,
[0073] 6.9g polyethylene glycol 200, 15g acetone, continue to stir at 65°C for 1h;
[0074] (2) Add 13.8g polyethylene glycol 2000 and 23.39g epoxy resin E-39 in the product in step (1), add in the system through the 10.35g nitrocellulose dissolved in acetone and 0.7g dibutyltin dilaurate, Raise the temperature to 70°C for 1 hour and then raise the temperature to 90°C for 2 hours.
[0075] (3) The product in step (2) is distilled off the organic solvent under reduced pressure. Cool down to 50°C, add 150mL of distilled water or deionized water dropwise within 20 minutes, and at the same time stir rapidly at 700-800r / min to emulsify to obtain a cellulose-based emulsion for highly stable water-based environmental protection coatings.
Embodiment 3
[0077] (1) Add 12g of diphenylmethane diisocyanate (MDI), 9.6g of polyethylene glycol 600, and 20g of xylene into a three-necked flask equipped with a stirrer and a reflux condenser, and continue stirring at 80°C for 2 hours;
[0078] (2) Add 9.6g PEG6000 and 29.09g epoxy resin E-44 to the product in step (1), add 12.36g nitrocellulose and 1g triethyltin acetate dissolved in butanone into the system, and heat up to 85°C Insulated reaction for 1h; then heated to 90°C for 2.5h at constant temperature.
[0079] (3) The product in step (2) is distilled off the organic solvent under reduced pressure. Cool down to 50°C, add 150mL of distilled water or deionized water dropwise within 20 minutes, and at the same time stir rapidly at 700-800r / min to emulsify to obtain a cellulose-based highly stable water-based resin for environmental protection coatings.
[0080] In the following examples, the pigments, thickeners, anti-settling agents, anti-sagging agents, defoamers, dispersants, le...
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