Hydrolytic polymerization of epsilon-caprolactam
An improved process for the continuous polymerization of epsilon -caprolactam in the presence of water as initiator in a vertical downward-flow tubular reactor, in which the epsilon -caprolactam is partially polymerized at elevated temperature in a first, mechanically agitated reaction zone and is f...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An improved process for the continuous polymerization of epsilon -caprolactam in the presence of water as initiator in a vertical downward-flow tubular reactor, in which the epsilon -caprolactam is partially polymerized at elevated temperature in a first, mechanically agitated reaction zone and is further polymerized in further reaction zones to the desired degree of polymerization. Poly- epsilon -caprolactam is discharged in the form of a melt. The polymerization is carried out at a gauge pressure of from 0.2 to 0.9 bar, constant in all reaction zones. The temperature in the first reaction zone is maintained according to the relationship t |
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