Adhesive for electronic paper, and preparation method and application thereof
A technology of electronic paper and adhesives, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of high activation temperature and difficult adhesion, and achieve low activation temperature and water resistance Good, quality controllable effect
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Embodiment 1
[0047] This example is a synthesis example of an adhesive water-based polyurethane emulsion for electronic paper.
[0048] Prepare raw materials according to the following formula (in this example, the molar ratio of polyester polyol to polyether polyol=10:7):
[0049] unica-500 (carboxyl polyester diol with molecular weight Mn=500) 27.5g, PPG2000 (polypropylene glycol-2000) 75g, IPDI (isophorone diisocyanate) 33.5g, DMPA (chain extender 2, 2-dimethylolpropionic acid) 3.4g;
[0050] Use a three-necked flask to connect the stirrer, a condenser, and heat it in a water bath to 75°C, add the above ingredients into the three-necked flask, and stir for 2h; then lower the temperature to 45°C, and when the temperature of the reaction mixture in the three-necked flask reaches 45°C, use Weigh 70g of acetone into the beaker and add it to the three-neck flask. Weigh 12.45g of triethylamine and slowly drop it into a three-necked flask with a dropper, and continue to stir for 0.5h to obta...
Embodiment 2
[0052] This example is another synthesis example of an adhesive water-based polyurethane emulsion for electronic paper.
[0053] Prepare raw materials according to the following formula (in this example, the molar ratio of polyester polyol to polyether polyol=9:10):
[0054] BY3301 (sulfonate polyester polyol with molecular weight Mn1000) 57.5g, PEG1500 95g, IPDI 33.5g, chain extender sodium ethylenediamine sulfonate 4.6g;
[0055] Use a three-necked flask to connect the agitator, a condenser, and heat it in a water bath to 80°C. Add the above ingredients into the reaction kettle, stir for 4 hours, then lower the temperature to 50°C. After the temperature of the reaction mixture in the three-necked flask reaches 50°C, use Weigh a certain amount of acetone into the beaker and add it to the three-neck flask. Weigh 17.6g of triethylamine and slowly drop it into a three-necked flask with a dropper, continue to stir for 0.5h, then pour the glue into a large beaker, disperse and emul...
Embodiment 3
[0057] This example is another synthesis example of an adhesive water-based polyurethane emulsion for electronic paper. (In this example, the molar ratio of polyester polyol to polyether polyol = 10:1)
[0058] unica-1000 (carboxyl polyester diol with molecular weight Mn=1000) 100.0 g, PEG1000 10g, IPDI 33.5g, DMPA 2.1g
[0059] Use a three-necked flask to connect the stirrer, condenser, and heat the three-necked flask to 85°C in a water bath, add the above ingredients into the reaction kettle, stir for 8 hours, then lower the temperature of the water bath to 55°C, and wait until the temperature of the reactants in the three-necked flask reaches 55°C Finally, weigh an appropriate amount of acetone with a beaker and add it to a three-neck flask. Weigh 14.7g of triethylamine and slowly drop it into a three-necked flask with a dropper, continue to stir for 0.5h, then pour the glue into a large beaker, disperse and emulsify at a high speed of 1000 rpm, then weigh deionized water ...
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