Water-based hydrolysis-resistant polyurethane adhesive for shoes and preparation method of water-based hydrolysis-resistant polyurethane adhesive
A technology of water-based polyurethane and polyurethane glue, which is applied in the field of polyurethane glue to achieve the effects of improving hydrolysis resistance, improving interpenetrating network structure, and shortening curing time
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Embodiment 1
[0025] Fluorinated carboxylic acids are made by the following steps:
[0026] Dissolve 0.01 mol of 4-iodobenzoic acid in 10 mL of dimethyl sulfoxide and add it to a four-necked flask with a thermometer, then add 0.03 mol of copper powder and 0.03 mol of perfluoroiodohexane, and pass through high-purity nitrogen protection, at 100 React at ℃ for 3 hours, add 60 mL of ice water to cool down the reaction liquid after the reaction is completed, stir for 15 minutes, add hydrochloric acid to acidify, stir for 5 minutes, filter, wash the filter cake with water for 3 times, extract with ether, wash with water until neutral, dry, and concentrate A solid was obtained, which was recrystallized from ethanol to obtain a fluorine-containing carboxylic acid.
Embodiment 2
[0028] Fluorinated carboxylic acids are made by the following steps:
[0029] Dissolve 0.01mol of 4-iodobenzoic acid in 30mL of dimethyl sulfoxide and add it to a four-necked flask with a thermometer, then add 0.03mol of copper powder and 0.03mol of perfluoroiodohexane, and pass through high-purity nitrogen protection, at 110 React at ℃ for 3 hours, add 60mL of ice water to cool down the reaction liquid after the reaction is completed, stir for 15 minutes at the same time, add hydrochloric acid to acidify, stir for 5 minutes, filter, wash the filter cake with water several times, extract with ether, wash with water until neutral, dry, and concentrate A solid was obtained, which was recrystallized from ethanol to obtain a fluorine-containing carboxylic acid.
Embodiment 3
[0031] Fluorinated epoxy resins are made by the following steps:
[0032] Step B1. Dissolve 0.01 mol of the fluorine-containing carboxylic acid prepared in Example 1 in 30 mL of thionyl chloride, add 10 mL of DMF to the solution, and heat to reflux for 5 hours. After the reaction is completed, remove the thionyl chloride by rotary evaporation, and finally use The oil pump was spin-dried to obtain the acid chloride carboxylic acid; put 0.1mol trishydroxymethylaminomethane and 70mL dichloromethane into a three-necked flask equipped with a thermometer and a stirring device, and in an ice-water bath, add dropwise 50mL containing 0.1mol acid chloride carboxylate The dichloromethane solution of the acid, the dropping speed is 1 drop / second, after the dropping is completed, it is raised to room temperature and stirred for 4 hours to obtain the fluorine-containing polyhydroxy compound;
[0033] Step B2, add 0.1mol isophorone diisocyanate, 0.375g dibutyltin dilaurate and 100mL acetone ...
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