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The preparation of nylon 66 salt

By dibasic acid and diamine from nylon, need to strictly control the ratio of raw materials such as mole ratio, can obtain the high molecular weight polymer, therefore, must first put in the production of adipic acid and adipic amine mixture made of nylon 66 salt. The preparation of nylon 66 salt is respectively the hexamethylenediamine and adipic acid ethanol solution of ethanol solution, mixing in more than 60 ℃ temperature and salt precipitation, after filtered, alcohol washing, drying, the final mixture 63% aqueous solution, for the use of polycondensation.

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