公开(公告)号：DE4238996A1

公开(公告)日：1994-05-26

申请号：DE4238996

申请日：1992-11-19

Applicant: BASF MAGNETICS GMBH

Inventor： HAGEMEYER ALFRED DR ,  HIBST HARTMUT DR ,  MAURER RICHARD DR ,  JAKUSCH HELMUT DR ,  BAEUERLE DIETER PROF DR ,  HEITZ JOHANNES

IPC: G11B5/842 ,  G11B5/84

Abstract: The invention relates to a process for the production of magnetic recording media (carriers) essentially comprising a polymeric substrate and at least one magnetic layer, applied to the substrate, of a solidified dispersion of finely divided magnetic pigments in a solution of organic binders and conventional additives, where the substrate, in particular in order to improve the adhesive strength of the magnetic layer to the substrate, is treated with UV radiation produced by the decomposition of excimers.

公开(公告)号：DE4210739A1

公开(公告)日：1993-10-07

申请号：DE4210739

申请日：1992-04-01

Applicant: BASF MAGNETICS GMBH

Inventor： VEITCH RONALD JOHN DR ,  JAKUSCH HELMUT DR ,  HEILMANN PETER DR

IPC: G01K11/06 ,  G01K3/00 ,  G01K11/00 ,  A23L3/36 ,  B65D79/02 ,  G09F13/00 ,  G09F7/00

Abstract: A description is given of a monitoring device for frozen foods, with the aid of which overshooting of an additional storage temperature is irreversibly indicated. A flat plastic bag with transparent walls is connected to the frozen goods in a thermally conductive fashion, and a eutectic medium having a liquid/solid phase transition in the range from 0 DEG C to -50 DEG C is introduced into said bag together with a magnetic dispersion consisting of finely disperse magnetic pigments. Bonded on the bag is a magnetic strip which contains a magnetically recorded pattern and which remains connected to the bag until the monitoring device with the frozen goods is cooled below the limiting temperature. The magnetic strip is then removed. Upon overshooting of the permissible limiting temperature, the optically or magnetically readable structure generated by the magnetic strip is cancelled in the monitoring bag, so that it is easy to monitor the frozen food. The invention permits numerous varying possibilities by the combination of a plurality of mounted magnetic strips.

公开(公告)号：DE19638035A1

公开(公告)日：1997-04-03

申请号：DE19638035

申请日：1996-09-18

Applicant: BASF MAGNETICS GMBH

Inventor： AUWETER HELMUT DR ,  LOESER WERNER DR ,  PFANNEBECKER EMIL ,  SCHNEIDER NORBERT ,  JAKUSCH HELMUT DR ,  WIETHOELTER DIETER ,  KOERNER REINHARD DR ,  OHLINGER MANFRED DR

IPC: G11B5/842 ,  G11B5/84

Abstract: The magnetic recording material has a non magnetic carrier which is coated with a polymer binding material that contains a dispersion of fine pigments of needle type magnetic particles. Two types of pigment are used with the first having a concentration of 15-45 meters per gram and the second having 5 meters per gram higher. The mix is with a first pigment of 50-59 % and the second pigment with 41-50%.

公开(公告)号：DE4339841A1

公开(公告)日：1995-05-24

申请号：DE4339841

申请日：1993-11-23

Applicant: BASF MAGNETICS GMBH

Inventor： JACHOW HARALD DR ,  WEITCH RONALD JOHN DR ,  SCHWAB EKKEHARD DR ,  JAKUSCH HELMUT DR ,  HOEPPNER BERND DR ,  LEHNERT RUDI DR ,  OHLINGER MANFRED DR ,  KOERNER REINHARD DR

IPC: C01G37/027 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/11

Abstract: Finely divided, needle-like magnetic CrO2 modified with Fe, Te and/or Sb has a coercive field strength of at least 40 kA/m, a saturation magnetisation of at least 85 nTm /g, and a specific surface area (SSA) of a least 25 m /g. A temp. dependent drop of remanent magnetisation of around 50% is achieved only above 95 deg C. Prodn. of the CrO2 is also claimed.

公开(公告)号：DE4142166A1

公开(公告)日：1993-06-24

申请号：DE4142166

申请日：1991-12-20

Applicant: BASF MAGNETICS GMBH

Inventor： JACHOW HARALD DR ,  SCHWAB EKKEHARD DR ,  KOERNER REINHARD DR ,  MUELLER NORBERT DR ,  LEHNERT RUDI DR ,  OHLINGER MANFRED DR ,  AUWETER HELMUT DR ,  JAKUSCH HELMUT DR ,  VEITCH RONALD DR ,  BOBRICH MICHAEL DR

IPC: C01G37/027 ,  C09D5/23 ,  G11B5/706 ,  G11B5/73

公开(公告)号：DE4425873A1

公开(公告)日：1996-01-25

申请号：DE4425873

申请日：1994-07-21

Applicant: BASF MAGNETICS GMBH

Inventor： AUWETER HELMUT DR ,  LOESER WERNER DR ,  PFANNEBECKER EMIL ,  SCHNEIDER NORBERT ,  JAKUSCH HELMUT DR ,  WIETHOELTER DIETER DIPL ING

IPC: C09D5/23 ,  G11B5/70 ,  G11B5/706 ,  G11B5/84 ,  G11B5/68

Abstract: The process concerns the prodn. of a magnetic recording medium, which has a non-magnetic substrate and coating(s) of magnetic dispersion comprising a mixt. of finely-divided magnetisable pigments which differ in morphology and/or particle size, finely dispersed in a polymeric binder matrix and opt. other additives. The novelty is that the mixed and/or co-compacted pigments are added to the dispersion and the pigment mixt. contains (a) 60-95 wt.% acicular pigment(s) (I) with a BET value of 15-45 m /g and (b) 5-40 wt.% acicular pigment(s) (II) with a BET value at least 5 m /g higher than that of (I).

公开(公告)号：DE59305437D1

公开(公告)日：1997-03-27

申请号：DE59305437

申请日：1993-08-27

Applicant: BASF MAGNETICS GMBH

Inventor： JAKUSCH HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  HITZFELD MICHAEL DR ,  ROLLER HERMANN ,  BAUR REINHOLD DR ,  ROTHFUSS EDWIN

IPC: C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/70 ,  G11B5/706 ,  G11B5/73

公开(公告)号：DE59203037D1

公开(公告)日：1995-08-31

申请号：DE59203037

申请日：1992-12-05

Applicant: BASF MAGNETICS GMBH

Inventor： JACHOW HARALD DR ,  SCHWAB EKKEHARD DR ,  KOERNER REINHARD DR ,  MUELLER NORBERT DR ,  LEHNERT RUDI DR ,  OHLINGER MANFRED DR ,  AUWETER HELMUT DR ,  JAKUSCH HELMUT DR ,  VEITCH RONALD JOHN DR ,  BOBRICH MICHAEL DR

IPC: C01G37/027 ,  C09D5/23 ,  G11B5/706 ,  G11B5/73

公开(公告)号：DE4229246A1

公开(公告)日：1994-03-03

申请号：DE4229246

申请日：1992-09-02

Applicant: BASF MAGNETICS GMBH

Inventor： JAKUSCH HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  HITZFELD MICHAEL DR ,  ROLLER HERMANN ,  BAUR REINHOLD DR ,  ROTHFUSS EDWIN

IPC: C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/70 ,  G11B5/706 ,  G11B5/73 ,  G11B5/714 ,  G11B5/842

公开(公告)号：DE4032129A1

公开(公告)日：1992-04-16

申请号：DE4032129

申请日：1990-10-10

Applicant: BASF MAGNETICS GMBH

Inventor： VEITCH RONALD JOHN DR ,  SOEHRING GERHARD ,  JAKUSCH HELMUT DR ,  KOCH VOLKER DR

IPC: G11B5/845

Abstract: The stochastic alignment system uses a magnetic drum (3) with radial permanent magnets of alternating polarity, rotated relative to the surface of an organic layer (2) incorporating finely dispersed magnetic particles applied to a flexible carrier (1). The dispersed magnetic particles may be oriented via a uniform, undidirectional, magnetic field before the stochastic alignment. - The rotation rate of the magnetic drum (3) and/or its spacing from the dispersion layer (2) are regulated by monitoring the stochastic alignment of the magnetic particles.