A preparation method of high-strength quick-drying adhesive for corrugated boxes
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Embodiment 1
[0034] Preparation of dimethylolpropionic acid derivatives:
[0035] The first step, after mixing 0.01mol 4-iodobenzoic acid and 30mL dimethyl sulfoxide, add 0.03mol copper powder and 0.03mol perfluoroiodohexane, under the protection of nitrogen, react at 105°C for 3h, after the reaction is completed, add 60mL of ice water was used to cool down the reaction solution, while vigorously stirring for 15 minutes, adding hydrochloric acid to acidify, stirring for 5 minutes, filtering, washing the filter cake with water, extracting with ether, drying and concentrating to obtain a solid crude product, which was recrystallized with ethanol to obtain a fluorine-containing carboxylic acid;
[0036]In the second step, add 0.1mol dimethylolpropionic acid, 0.1mol fluorine-containing carboxylic acid and 50mL ethanol into a three-necked flask with a condenser, a thermometer and a stirring paddle, heat to 75°C, and then add 0.67g under stirring For p-toluenesulfonic acid, stirred for 4 hours, ...
Embodiment 2
[0038] Preparation of castor oil derivatives:
[0039] Add 0.1mol castor oil and 3.7g p-toluenesulfonic acid into a four-neck flask equipped with a stirring paddle, a drying tube, a condenser tube, a nitrogen inlet, and a water separator. Under the protection of nitrogen, heat to 140°C, and slowly add 0.3mol The dimethylol propionic acid derivative prepared in Example 1 was stirred and reacted for 3 hours, the nitrogen flow was stopped, vacuumed to an absolute pressure of 0.01 MPa, and stirred and reacted for 3 hours to obtain a castor oil derivative.
Embodiment 3
[0041] Functional monomers are made through the following steps:
[0042] Mix 0.1mol of p-phenylenediamine, 0.05g of methylhydroquinone, 0.15mol of triethylamine and 80mL of tetrahydrofuran evenly, and add dropwise 0.1mol of acryloyl chloride in tetrahydrofuran at 0°C, at a rate of 3 drops / second, and the addition is complete Afterwards, the temperature was raised to room temperature, the reaction was stirred for 12 hours, and the crude product was obtained by rotary evaporation, which was recrystallized with ethanol to obtain the functional monomer.
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