Method for producing nylon 6 using hexanolactam oligomer residue

A process for preparing the nylon 6 with dregs of oligomer caprolactam includes ring-opening polymerization at 220-250 deg.C in the presence of catalyst which is one or more selected from a group of phosphates, organic esters, amino acids and caprolactam sodium (potassium), and vacuum polymerization...

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Bibliographic Details
Main Authors CHUNXIAO LIU, QIANXIN WU, RUSHENG DENG
Format Patent
LanguageEnglish
Published 02.07.1997
Edition6
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
NATURAL OR ARTIFICIAL THREADS OR FIBRES
ORGANIC MACROMOLECULAR COMPOUNDS
SPINNING
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A process for preparing the nylon 6 with dregs of oligomer caprolactam includes ring-opening polymerization at 220-250 deg.C in the presence of catalyst which is one or more selected from a group of phosphates, organic esters, amino acids and caprolactam sodium (potassium), and vacuum polymerization at 260-285 deg.C and 0.10-1.0 MPa. Obtained nylon 6 has 2.5-3.0 of relative viscosity and may be used as engineering plastics. Said process is suitable for high-alkaline dregs.
Bibliography:Application Number: CN1996118401