Polymerization of .epsilon.-caprolactam

Details Polymerization of .epsilon.-caprolactam Polymerization of .epsilon.-caprolactam

C - Chemistry, Metallurgy

08

G

402/229

C08G 69/16 (2006.01)

Patent

CA 1076743

O.Z. 31,765 ABSTRACT OF THE DISCLOSURE An improved process for the continuous polymerization of .epsilon.-capro- lactam in the presence of water as initiator in a vertical down- ward-flow tubular reactor, in which the .epsilon.-caprolactam is partially polymerized at elevated temperature in a first, mechanically agi- tated 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 from 260 to 295°C whilst obeying the condition t ? 265 + 43 p °C, wherep is the numerical value of the gauge pressure in bars.

266548

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