公开(公告)号：DE3126835A1

公开(公告)日：1983-01-27

申请号：DE3126835

申请日：1981-07-08

Applicant: BASF AG

Inventor： STREHLER HUGO DIPL CHEM DR ,  KEGEL ROBERT DIPL ING ,  VALENTIN GUENTER ING GRAD ,  HOERAUF WERNER DIPL CHEM DR

IPC: C02F1/24 ,  C08G69/16 ,  C08G69/46 ,  C07D201/16

公开(公告)号：DE2918828A1

公开(公告)日：1980-11-20

申请号：DE2918828

申请日：1979-05-10

Applicant: BASF AG

Inventor： MATTHIES PAUL ,  VALENTIN GUENTER ING GRAD ,  HOERAUF WERNER DIPL CHEM DR ,  ROTZOLL RUDI-HEINZ DIPL CHEM D

IPC: C08G69/00 ,  B01J19/18 ,  C08G69/04 ,  C08G69/16

Abstract: A process for the continuous preparation of polycaprolactam, which comprises polymerizing epsilon -caprolactam in a vertical tubular reactor through which the epsilon -caprolactam flows downward, wherein the epsilon -caprolactam is partially polymerized, at a nylon-forming temperature, in a mechanically mixed zone, the reaction mixture is circulated through a heat exchange zone in the lower part of the mechanically mixed reaction zone, and is polymerized further, in additional heat exchange zones, until the desired degree of polymerization is reached, and poly- epsilon -caprolactam is then discharged as a melt, and an apparatus for carrying out the process.

公开(公告)号：DE2755941A1

公开(公告)日：1979-06-21

申请号：DE2755941

申请日：1977-12-15

Applicant: BASF AG

Inventor： HOERAUF WERNER DIPL CHEM DR ,  VALENTIN GUENTER ING GRAD

IPC: C08F6/00 ,  C08G63/78 ,  C08G63/88 ,  C08G69/00 ,  C08G69/30 ,  C08J3/00 ,  B29B3/00

公开(公告)号：DE3128476A1

公开(公告)日：1983-02-03

申请号：DE3128476

申请日：1981-07-18

Applicant: BASF AG

Inventor： STREHLER HUGO DIPL CHEM DR ,  HOERAUF WERNER DIPL CHEM DR ,  VALENTIN GUENTER ING GRAD

IPC: C08J3/22 ,  C08K3/22 ,  C08L77/02 ,  C09D17/00 ,  C09C1/36 ,  C09C3/10 ,  D01F1/04

Abstract: Concentrates of from 20 to 50% by weight of titanium dioxide in polycaprolactam are produced by a process in which a 5-15% strength by weight aqueous suspension of titanium dioxide is metered into a solution of caprolactam in water at from 100 DEG to 150 DEG C. at the same rate at which water is distilled off, and after the water has been distilled off the resulting mixture is polymerized at from 240 DEG to 280 DEG C.

公开(公告)号：DE2734946A1

公开(公告)日：1979-02-15

申请号：DE2734946

申请日：1977-08-03

Applicant: BASF AG

Inventor： HOERAUF WERNER DIPL CHEM DR ,  VALENTIN GUENTER ING GRAD ,  KEGEL ROBERT DIPL ING ,  KUHN HELMUT DIPL ING

IPC: B29B9/00 ,  B29B7/00 ,  B29B9/06 ,  B29C47/00 ,  B29C47/78 ,  B29C48/30 ,  B29C48/76 ,  B29C48/92 ,  B08B15/00

Abstract: A process for removing volatile constituents which are evolved from plastic melts when extruding the latter and are drawn off together with the surrounding air. The volatile constituents are drawn off immediately as they are evolved by the plastic melt and the air containing such volatile constituents is heated immediately after entering the suction orifice, and an apparatus for carrying out this process.