公开(公告)号：AT253105T

公开(公告)日：2003-11-15

申请号：AT00118522

申请日：2000-08-25

Applicant: BASF AG

Inventor： PRECHTL FRANK DR ,  SCHNEIDER NORBERT ,  MEYER FRANK DR ,  PARKER ROBERT ,  RICHTER VOLKER ,  HEILMANN PETER DR ,  KOCH VOLKER DR ,  SCHUHMACHER PETER DR

IPC: G02B5/30 ,  C08F2/46 ,  C08F20/26 ,  C09B67/00 ,  C09B67/02 ,  C09B67/08 ,  C09B67/20 ,  C09D5/29 ,  C09D5/36 ,  C09D201/00 ,  C09K19/00 ,  G02F1/1335

Abstract: Cholesteric laminate material has at least one 3-dimensionally crosslinked, oriented cholesteric layer (I) showing a homogeneous interference line pattern over the entire thickness. Independent claims are also included for the following: (a) cholesteric pigment comprising layer(s) (I) with an average particle size of 5-50 mu m and thickness of 0.2-5 mu m; (b) compositions containing the pigment(s); (c) polarizers, comprising the laminate and optionally a substrate foil; (d) broad band polarizers comprising laminates with a total thickness of about 2-50 mu m (without substrate film) and 3-20 cholesteric layers with attuned reflection maxima; and (e) the production of the laminate with layer(s) (I).

公开(公告)号：DE3742767A1

公开(公告)日：1989-06-29

申请号：DE3742767

申请日：1987-12-17

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  FRECHEN THOMAS DR ,  HEILMANN PETER DR ,  KOCH VOLKER DR ,  DOERR KURT DR ,  HOFFMANN HANS-JOACHIM DR ,  NOWAK UWE DR

IPC: G11B5/72 ,  G11B5/84

公开(公告)号：DE3644822A1

公开(公告)日：1988-07-14

申请号：DE3644822

申请日：1986-12-31

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  NOWAK UWE DR ,  GRAU WERNER DR ,  KOCH VOLKER DR ,  KOENIG ROLAND DR

IPC: G11B5/72 ,  C10M105/02 ,  C10N40/18 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: The discs comprise a non-magnetic base material, a magnetic layer applied thereto on at least one side, based on a magnetic material finely distributed in an organic binder matrix, and a friction-reducing carbon layer, situated on the surface of the magnetic layer.

公开(公告)号：AT46590T

公开(公告)日：1989-10-15

申请号：AT85107310

申请日：1985-06-13

Applicant: BASF AG

Inventor： FEHRENBACH HUBERT ,  KOCH VOLKER DR ,  BOESE BERNHARD

IPC: B23P25/00 ,  B23Q1/34 ,  B23Q1/36 ,  B25B11/00 ,  G11B5/84 ,  B23B1/00

公开(公告)号：DE3769111D1

公开(公告)日：1991-05-08

申请号：DE3769111

申请日：1987-12-19

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  NOWAK UWE DR ,  GRAU WERNER DR ,  KOCH VOLKER DR ,  KOENIG ROLAND DR

IPC: G11B5/72 ,  C10M105/02 ,  C10N40/18 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: The discs comprise a non-magnetic base material, a magnetic layer applied thereto on at least one side, based on a magnetic material finely distributed in an organic binder matrix, and a friction-reducing carbon layer, situated on the surface of the magnetic layer.

公开(公告)号：DE3274314D1

公开(公告)日：1987-01-02

申请号：DE3274314

申请日：1982-07-14

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  GRITTMANN ERNST-JUERGEN ,  KOCH VOLKER DR

IPC: G05D3/12 ,  G11B5/55 ,  G11B21/02

公开(公告)号：DE3446306A1

公开(公告)日：1985-07-04

申请号：DE3446306

申请日：1984-12-19

Applicant: BASF AG

Inventor： FEHRENBACH HUBERT ,  KOCH VOLKER DR ,  BOESE BERNHARD

IPC: B23P25/00 ,  B23Q1/34 ,  B23Q1/36 ,  B25B11/00 ,  G11B5/84

Abstract: Before they are coated with the magnetisable material, the substrate plates are machined on a precision lathe in such a way that the annular surface (2) intended for the recording area is convexly curved on both sides of the plate. For this purpose, during machining, the substrate plate (1) is held on the lathe chuck (4) with a concave curvature of the annular surface and is machined off flat with a purely radial advancing motion of the cutting tool (11), or is held on a flat lathe chuck (21) and is machined off with an advancing motion of the tool (16) which corresponds to the desired convex curvature of the annular surface (2). In the case of the first of these two machining methods, after removal from the lathe chuck (4), the elastically deformed substrate plate relaxes to give a convexly curved annular surface.

公开(公告)号：DE3876414D1

公开(公告)日：1993-01-14

申请号：DE3876414

申请日：1988-12-10

Applicant: BASF AG

Inventor： NOWAK UWE DR ,  HOFFMANN HANS-JOACHIM DR ,  DOERR KURT DR ,  KOCH VOLKER DR ,  HEILMANN PETER DR ,  FRECHEN THOMAS DR ,  HITZFELD MICHAEL DR

IPC: G11B5/72 ,  G11B5/84

Abstract: The recording tape or carrier consists essentially of a non-magnetic base and a thin layer of metallic and magnetic material deposited on the top, with a surface layer and a protecting layer of amorphous carbon which contains some hydrogen. This surface layer is produced in a vacuum chamber by means of a ''sputtering'' process with a carbon target.

公开(公告)号：DE3721742A1

公开(公告)日：1989-01-12

申请号：DE3721742

申请日：1987-07-01

Applicant: BASF AG

Inventor： SCHNEIDER NORBERT ,  NOWAK UWE DR ,  NICKOLAY GERD ,  KLEIN URSULA ,  LENZ WERNER DR ,  JAKUSCH HELMUT DR ,  KOCH VOLKER DR ,  DOMAS FRIEDRICH

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/82 ,  G11B5/72 ,  H01F10/10