公开(公告)号：DE2558480A1

公开(公告)日：1977-07-07

申请号：DE2558480

申请日：1975-12-24

Applicant: BASF AG

Inventor： KUNDE JOACHIM DIPL CHEM DR ,  HOERAUF WERNER DIPL CHEM DR ,  MATTHIES PAUL DIPL CHEM DR

IPC: C08G69/00 ,  C08G69/16

公开(公告)号：DE3134716A1

公开(公告)日：1983-03-10

申请号：DE3134716

申请日：1981-09-02

Applicant: BASF AG

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

IPC: C08G69/16 ,  C08G69/46

公开(公告)号：DE3128477A1

公开(公告)日：1983-02-03

申请号：DE3128477

申请日：1981-07-18

Applicant: BASF AG

Inventor： BELDE HORST DIPL ING ,  LANGENFELDER HANS ,  HOERAUF WERNER DIPL CHEM DR

IPC: C09D17/00 ,  C09C1/36 ,  C09C3/08 ,  D01F1/04

Abstract: Aqueous suspensions of finely divided titanium dioxide are produced in the presence of dispersants by a process in which titanium dioxide powder and caprolactam are kneaded together in the dry state at from 15 DEG to 40 DEG C., the resulting mixture is kneaded with the addition of water, the paste thus obtained is suspended in water, the suspension is then allowed to sediment, and the resulting suspension containing finely divided titanium dioxide is decanted.

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：DE2514129A1

公开(公告)日：1976-09-30

申请号：DE2514129

申请日：1975-03-29

Applicant: BASF AG

Inventor： HOERAUF WERNER DIPL CHEM DR ,  PIRZER HANS DIPL CHEM DR ,  GUENTHER ERNST ,  NEUMANN ECKART ,  DIETRICH ERNST

IPC: F15D1/02 ,  B01J1/00

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：DE3032198A1

公开(公告)日：1982-04-08

申请号：DE3032198

申请日：1980-08-27

Applicant: BASF AG

Inventor： ELBS PETER ING GRAD ,  JESERICH WOLFGANG-DIETER DIPL ,  HOERAUF WERNER DIPL CHEM DR ,  WEHR RUDOLF DIPL CHEM DR

IPC: B29B9/00 ,  B29B9/04 ,  B29B9/06 ,  B29B13/06 ,  B29C47/88 ,  F26B13/30 ,  B29B1/02

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.

公开(公告)号：DE3205645A1

公开(公告)日：1983-08-25

申请号：DE3205645

申请日：1982-02-17

Applicant: BASF AG

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

IPC: D01F6/00 ,  D01D5/088 ,  D01D13/00 ,  D01D5/04

公开(公告)号：DE3134717A1

公开(公告)日：1983-03-10

申请号：DE3134717

申请日：1981-09-02

Applicant: BASF AG

Inventor： STREHLER HUGO DIPL CHEM DR ,  HOERAUF WERNER DIPL CHEM DR ,  URBANEK FRIEDRICH DIPL CHEM DR

IPC: C08G69/16 ,  C08G69/46

Abstract: An improved process for the preparation of fiber-forming polycaprolactam by polymerizing epsilon -caprolactam, and an aqueous extract containing epsilon -caprolactam and caprolactam oligomers, which extract has been obtained by extracting polycaprolactam with water, wherein the aqueous extract contains from 0.1 to 5.0% by weight of oligomers of caprolactam, based on the monomeric caprolactam in the aqueous extract.