Continuous preparation of polylactams

Details Continuous preparation of polylactams Continuous preparation of polylactams

C - Chemistry, Metallurgy

08

G

402/228

C08G 69/16 (2006.01)

Patent

CA 1211889

- 8 - O.Z. 0050/36394 Abstract of the Disclosure: Polylactams are prepared con- tinuously by a process in which a lactam containing from 1 to 25% by weight of water is heated in a prepolymerization zone under a pressure of from 1 to 10 bar at from 220 to 280°C for from 1 to 10 minutes, water being vaporized at the same time, with the proviso that the degree of conver- sion on emergence from the prepolymerization zone is not Less than 85%, the prepolymer and the vapor are separated continuously, and the prepolymer is passed into a polymer- ization zone and is polymerized further under superatmos- pheric pressure at from 240 to 290°C.

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