公开(公告)号：CA1211889A

公开(公告)日：1986-09-23

申请号：CA447878

申请日：1984-02-21

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  THEYSOHN RAINER ,  ZAHRADNIK FRANZ

IPC: C08G69/00 ,  C08G69/16

Abstract: - 8 - O.Z. 0050/36394 Polylactams are prepared continuously 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.degree.C for from 1 to 10 minutes, water being vaporized at the same time, with the proviso that the degree of conversion 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 polymerization zone and is polymerized further under superatmospheric pressure at from 240 to 290.degree.C.

公开(公告)号：FI70240C

公开(公告)日：1986-09-15

申请号：FI810481

申请日：1981-02-17

Applicant: BASF AG

Inventor： REIMANN HORST ,  SCHMIDT FRANZ ,  WEISS HANS-PETER ,  PIPPER GUNTER

IPC: B29D7/00 ,  C08G69/26 ,  C08G69/36 ,  C08J5/18 ,  B29D7/01

公开(公告)号：DE3330154A1

公开(公告)日：1985-03-07

申请号：DE3330154

申请日：1983-08-20

Applicant: BASF AG

Inventor： BLINNE GERD DR ,  PIPPER GUNTER ,  STEGMAIER WOLFGANG DR

IPC: C08G75/23 ,  C08G65/40

公开(公告)号：DE3321581A1

公开(公告)日：1984-12-20

申请号：DE3321581

申请日：1983-06-15

Applicant: BASF AG

Inventor： SCHMIDT FRANZ DR ,  PIPPER GUNTER ,  FLOSS JOSEF GEORG DR ,  ZAHRADNIK FRANZ DR

IPC: C08G69/26 ,  C08G69/00 ,  C08G69/28 ,  C08L77/00

Abstract: Nylons are prepared by a continuous process in which, in an evaporator zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapors are separated continuously, the vapors are rectified and the entrained diamines are recycled, and the prepolymer is fed to a polycondensation zone and subjected to polycondensation under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is heated under superatmospheric pressure of from 1 to 10 bar during a residence time of less than 60 seconds, with the proviso that, on leaving the evaporator zone, the degree of conversion is not less than 93% and the water content of the prepolymer is not more than 7% by weight.