A kind of castor oil-based water-based photocurable nonionic emulsion and its preparation method and application
A castor oil-based, non-ionic technology is applied in the field of castor oil-based water-based photocurable non-ionic emulsion and its preparation, can solve problems such as few flexible segments, achieve high reproducibility, increase content, and be conducive to participating in polymerization. Effect
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Embodiment 1
[0021] (1) Add metered castor oil and ricinoleic acid (the molar ratio of castor oil to ricinoleic acid is 1 : 9) and N, N'-diisopropylcarbodiimide (amount of 1% of the molar amount of ricinoleic acid), stir and heat up to 120°C for 3 hours of vacuum dehydration reaction, then cool down to 65°C and add a certain amount of acetone (the amount is 10 times the total mass of castor oil and ricinoleic acid) to dissolve , then put it at 5°C and add a certain amount of cyclohexane (the amount is 15 times the total mass of castor oil and ricinoleic acid) to make the product crystallize and precipitate out, and dry it in vacuum to obtain pure castor oil-based star-shaped prepolymer thing;
[0022] (2) Mix isophorone diisocyanate (3 times the molar amount of castor oil) and dibutyltin dilaurate (0.1% by weight of pure castor oil-based star prepolymer) in a constant temperature water bath at 15°C Drop the mixture into the pure castor oil-based star-shaped prepolymer prepared in step (1)...
Embodiment 2
[0026] (1) Add metered castor oil and ricinoleic acid (the molar ratio of castor oil to ricinoleic acid is 1: 12) and dicyclohexylcarbodiimide (the molar amount of ricinoleic acid in the reaction kettle) 3%), stir and heat up to 150°C for 2 hours of vacuum dehydration reaction, then cool down to 75°C and add a certain amount of cyclohexanone (the amount is 15 times the total mass of castor oil and ricinoleic acid) to dissolve, and then dissolve it Place at 15°C and add a certain amount of octane (the amount is 10 times the total mass of castor oil and ricinoleic acid) to precipitate the product crystallization, and dry it in vacuum to obtain pure castor oil-based star prepolymer;
[0027] (2) Drop a mixture of toluene diisocyanate (3.1 times the molar amount of castor oil) and dibutyltin dilaurate (0.15% of the weight of pure castor oil-based star prepolymer) in a constant temperature water bath at 25°C Put it into the pure castor oil-based star-shaped prepolymer prepared in s...
Embodiment 3
[0031] (1) Add metered castor oil and ricinoleic acid (the molar ratio of castor oil to ricinoleic acid is 1:15) and 1-(3-dimethylaminopropyl)-3-ethyl Carbodiimide hydrochloride (the dosage is 2% of the molar amount of ricinoleic acid), stir and heat up to 130°C for 2.5 hours of vacuum dehydration reaction, then cool down to 68°C and add a certain amount of methyl ethyl ketone (the amount is castor oil and 12 times the total mass of castor oil and ricinoleic acid) to dissolve, then put it at 10°C and add a certain amount of n-hexane (the amount is 13 times the total mass of castor oil and ricinoleic acid) to precipitate the product crystallization, and vacuum dry Promptly obtain pure castor oil-based star prepolymer;
[0032] (2) Mix p-phenylene diisocyanate (3.2 times the molar amount of castor oil) and dibutyltin dilaurate (0.12% by weight of pure castor oil-based star prepolymer) in a constant temperature water bath at 20°C Drop into the pure castor oil-based star-shaped p...
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