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Process for preparing a polyamide, a nylon salt to be used therein and a process for making the salt
Process for preparing a polyamide, a nylon salt to be used therein and a process for making the salt
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机译:制备聚酰胺的方法,其中使用的尼龙盐和制备该盐的方法
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摘要
The present invention relates to a process for preparing a polyamide, a polyamide material obtainable by the said process, a nylon salt to be used therein, and a process for making the nylon salt. The process for preparing the polyamide is a direct solid state polymerization process. The salt used herein is a granulate material, prepared by a process, comprising spraying an aqueous solution comprising a diamine and a dicarboxylic acid dissolved in an aqueous medium, or an aqueous slurry comprising a diammonium dicarboxylate salt dispersed in an aqueous medium directly obtained from such an aqueous solution, onto or in a fluidized bed of diammonium dicarboxylate salt particles, while evaporating the aqueous medium, thereby forming a granulate salt material.
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