Process for the solution recovery of nylon with high reactivity and articles made therefrom
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United States of America Patent
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Issued Date -
Dec 9, 2004
app pub date -
Jun 3, 2004
filing date -
Jun 6, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process is disclosed for the solution recovery of nylons from various post-industrial and post-consumer products, and in which the relative viscosity of the resulting polymer is effectively managed. The process includes contacting the waste products with hexamethylene diamine (alone or in monocarbamate form) and in a suitable solvent in a reactor. This is followed by dissolution and depolymerization of the polyamide material; separation of insoluble materials therefrom from the solution; recovery of the depolymerized polyamide from the separated solution; and repolymerization of the depolymerized polyamide. Articles formed using this process are also disclosed.
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