Preparation of polycaprolactam with aqueous extract containing caprolactam and caprolactam oligomers
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United States of America Patent
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Mar 13, 1984
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N/A
app pub date -
Aug 24, 1982
filing date -
Sep 2, 1981
priority date (Note) -
Expired
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Abstract
An improved process for the preparation of fiber-forming polycaprolactam by polymerizing .epsilon.-caprolactam, and an aqueous extract containing .epsilon.-caprolactam and caprolactam oligomers, which extract has been obtained by extracting polycaprolactam with water, wherein the aqueous extract contains from 0.1 to 5.0% by weight of oligomers of caprolactam, based on the monomeric caprolactam in the aqueous extract.
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