Process for preparing a high barrier amorphous polyamide-clay nanocomposite

摘要

This invention relates to a process for preparing an amorphous polyamide-clay nanocomposite comprising the steps of: a. melt mixing a layered clay material with an oligomeric polyamide resin to form an oligomeric polyamide resin-clay composite, and b. mixing the oligomeric resin-clay composite with a high molecular weight amorphous matrix polyamide comprising (i) a residue of at least two dicarboxylic acid components and (ii) a residue of at least one diamine component, wherein the layered clay material has been cation exchanged with an onium cation of the formula: