Nano waterborne ink binder and preparation method thereof
A technology of water-based ink and linking material, which is applied in ink, household utensils, applications, etc., can solve the problems of poor drying performance of water-based ink linking material and inability to use high-speed printing, etc., to achieve easy operation, improve poor drying performance, and high solid content. Effect
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[0031] A kind of preparation method of above-mentioned nano water-based ink linking material: specifically comprise the steps:
[0032] a. Heat isophorone diisocyanate and polypropylene glycol to 80~90°C and stir for 2~3 hours, add catalyst dibutyltin dilaurate and continue to stir for 20min~50min to react; during the reaction, detect the remaining amount of isocyanate group, When the detected remaining amount reaches the theoretical value, the temperature of the reaction solution is lowered;
[0033] The detection of the remaining amount of isocyanate groups is as follows: using di-n-butylamine titration to detect the isocyanate groups in the reaction solution.
[0034] Described di-n-butylamine titration comprises the following steps:
[0035] A) Prepare di-n-butylamine solution, add the sample taken from the reaction solution into anhydrous toluene; then add di-n-butylamine solution and mix well and let it stand for 20~30min;
[0036] B) Add isopropanol and bromocresol gree...
Embodiment 1
[0054] Embodiment 1, a kind of nano water-based ink link material, adopts the raw material of parts by weight in table 1:
[0055] Table 1 Nano water-based ink link material raw material ratio table
[0056]
[0057] Preparation:
[0058] a. Dry PPG-2000 in a drying oven at 120°C and 0.04Mpa vacuum for 1 hour, after the drying is completed. Add IPDI and PPG-2000 into a clean four-neck flask with reflux condenser, thermometer and stirring device, put the flask into a constant temperature water bath at 85°C, stir for 2 hours, add 0.1‰ catalyst, and react for 30 minutes , so that the reaction between IPDI and PPG-2000 is sufficient;
[0059] During the reaction process, a 3g sample was weighed from the reaction solution, placed in a clean Erlenmeyer flask, and the remaining amount of isocyanate group (-NCO) in the reaction solution was detected by di-n-butylamine titration. When the amount of -NCO in the sample reached the theoretical value, the temperature began to drop. ...
Embodiment 2
[0072] Embodiment 2, a kind of nano water-based ink linking material, adopts the raw material of parts by weight in table 1:
[0073] Table 2 Nano water-based ink link material raw material ratio table
[0074]
[0075] Preparation:
[0076] a. Dry PPG-2000 in a drying oven at 120°C and 0.04Mpa vacuum for 1 hour, after the drying is completed. Add IPDI and PPG-2000 into a clean four-neck flask with reflux condenser, thermometer and stirring device, put the flask into a constant temperature water bath at 80°C, stir and react for 2.5 hours, then add 0.26‰ catalyst and react for 20 minutes , so that the reaction between IPDI and PPG-2000 is sufficient;
[0077] During the reaction process, a 3g sample was weighed from the reaction solution, placed in a clean Erlenmeyer flask, and the remaining amount of isocyanate group (-NCO) in the reaction solution was detected by di-n-butylamine titration. When the amount of -NCO in the sample reached the theoretical value, the temperat...
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