公开(公告)号：DE3430819A1

公开(公告)日：1986-03-06

申请号：DE3430819

申请日：1984-08-22

Applicant: BASF AG

Inventor： HUEBNER WERNER ,  MELZER MILENA ,  KOESTER EBERHARD DR ,  BAUR REINHOLD DR ,  SOMMERMANN FRIEDRICH DR

IPC: G11B5/70 ,  G11B5/702 ,  G11B5/84 ,  G11B5/706 ,  B05D1/26 ,  H01F41/24

公开(公告)号：DE3420466A1

公开(公告)日：1985-12-05

申请号：DE3420466

申请日：1984-06-01

Applicant: BASF AG

Inventor： VAETH GUENTER ,  HEINZ ROBERT ,  OHLINGER MANFRED DR ,  RUDOLF PETER DR ,  HOFMANN FRIEDBERT DR ,  MELZER MILENA

IPC: G11B5/84 ,  H01F41/16

公开(公告)号：DE3381028D1

公开(公告)日：1990-02-01

申请号：DE3381028

申请日：1983-07-11

Applicant: BASF AG

Inventor： LEHNER AUGUST ,  VELIC MILAN DR ,  KOPKE HELMUT ,  BALZ WERNER DR ,  LENZ WERNER DR ,  BAUR REINHOLD DR ,  MELZER MILENA

IPC: C08L75/04 ,  G11B5/702

Abstract: Magnetic recording media comprising a non-magnetic base which is provided with a magnetic layer which consists essentially of a dispersion of an anisotropic magnetic material in a mixture of an OH-containing polyurea-urethane binder, which is crosslinked with a polyisocyanate, with a physically drying binder.

公开(公告)号：DE3276884D1

公开(公告)日：1987-09-03

申请号：DE3276884

申请日：1982-12-11

Applicant: BASF AG

Inventor： MELZER MILENA ,  SCHNEIDER NORBERT ,  KOPKE HELMUT ,  SCHOETTLE KLAUS ,  KOESTER EBERHARD DR ,  BALZ WERNER DR ,  GRAU WERNER DR

IPC: C08L75/06 ,  C09D5/23 ,  C09D171/00 ,  C09D171/10 ,  C09D175/06 ,  G11B5/70 ,  G11B5/702 ,  G11B5/84 ,  G11B5/842

公开(公告)号：DE3576010D1

公开(公告)日：1990-03-15

申请号：DE3576010

申请日：1985-10-10

Applicant: BASF AG

Inventor： KOHL ALBERT ,  MELZER MILENA ,  LEHNER AUGUST ,  SCHNEIDER NORBERT ,  KOESTER EBERHARD DR ,  BALZ WERNER DR ,  SOMMERMANN FRIEDRICH DR ,  RICKER ERNST DR

IPC: G11B5/702 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D163/00 ,  C09D167/00 ,  C09D171/00 ,  C09D171/12 ,  C09D175/00 ,  C09D175/04 ,  C10M105/58 ,  C10N40/18 ,  G11B5/708 ,  G11B5/71

Abstract: In magnetic recording media consisting of a non-magnetic base and, bonded on top of this, one or more magnetizable layers based on magnetic material finely dispersed in a polymer binder, a lubricant and further conventional additives, the lubricant used is a triethanolamine esterified with oleic acid.

公开(公告)号：DE3379946D1

公开(公告)日：1989-07-06

申请号：DE3379946

申请日：1983-06-20

Applicant: BASF AG

Inventor： OHLINGER MANFRED DR ,  VAETH GUENTER ,  RUDOLF PETER DR ,  SARNECKI WILHELM DR ,  JAKUSCH HELMUT DR ,  KOESTER EBERHARD DR ,  MELZER MILENA

IPC: C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  H01F1/11

Abstract: A process for the preparation of acicular ferrimagnetic iron oxides by reducing gamma-iron(III) oxide hydroxide to magnetite, at from 280 DEG to 620 DEG C., by means of an organic compound which is decomposable at this temperature in the presence of iron oxide, and, optionally, a stream of reducing gas, and, if desired, then oxidizing the magnetite with oxygen-containing gases, at from 150 DEG to 450 DEG C., to acicular ferrimagnetic iron oxide of the formula FeOx, where x is from above 1.33 to 1.50, wherein the organic compound used for the reduction is a non-polar glycerol ester of a fatty acid which is introduced into the aqueous reaction suspension during the preparation of the gamma-iron(III) oxide hydroxide.

公开(公告)号：DE3426366A1

公开(公告)日：1986-01-23

申请号：DE3426366

申请日：1984-07-18

Applicant: BASF AG

Inventor： MELZER MILENA ,  SCHNEIDER NORBERT ,  JAKUSCH HELMUT DR ,  BALZ WERNER DR ,  KOESTER EBERHARD DR ,  TRAPP HORST DR ,  RICKER ERNST DR

IPC: G11B5/702 ,  C09D5/23 ,  C09D175/06 ,  G11B5/70 ,  G11B5/842

Abstract: Magnetic recording media are produced by preparing a dispersion consisting of finely divided magnetic material, a dispersant, the conventional additives and a solution or a dispersion of a polymeric binder, applying the dispersion in the form of a layer onto a non-magnetizable base, orienting the anisotropic magnetic material by means of a magnetic field and drying the applied layer, by a process in which the dispersant employed is obtained by reacting A. from 70 to 95 parts by weight of a reaction product of I. from 0.5 to 1.5 moles of an oxoalcohol of 6 to 20 carbon atoms, II. from 6 to 18 moles of ethylene oxide and III. from 2 to 10 moles of propylene oxide, with B. from 5 to 30 parts by weight of a polyphosphoric acid having a P2O5 content of from 80 to 88%.

公开(公告)号：DE3227163A1

公开(公告)日：1984-01-26

申请号：DE3227163

申请日：1982-07-21

Applicant: BASF AG

Inventor： LEHNER AUGUST ,  VELIC MILAN DR ,  KOPKE HELMUT ,  MELZER MILENA ,  BALZ WERNER DR ,  LENZ WERNER DR ,  BAUR REINHOLD DR

IPC: C08L75/04 ,  G11B5/702 ,  G11B5/70

Abstract: The invention relates to magnetic recording supports made of a non-magnetic support material which is provided with a magnetic layer, essentially consisting of a dispersion of an anisotropic magnetic material in a mixture of a polyurea urethane binder containing OH groups, which is crosslinked with a polyisocyanate, and a physically drying binder in a mixing ratio of 1:0.8 to 1:0.1.

公开(公告)号：DE3885825D1

公开(公告)日：1994-01-05

申请号：DE3885825

申请日：1988-09-09

Applicant: BASF AG

Inventor： KOVACS JENOE DR ,  MELZER MILENA ,  BALZ WERNER DR ,  LENZ WERNER DR ,  LOCH WERNER DR ,  JAKUSCH HELMUT DR

IPC: G11B5/706 ,  C09D5/23 ,  C09D7/12 ,  C09D167/00 ,  C09D177/00 ,  C09D183/04 ,  G11B5/70 ,  G11B5/702 ,  G11B5/708 ,  G11B5/71

Abstract: The invention relates to magnetic recording media which have at least one magnetizable layer strongly bonded to a nonmagnetic substrate, the magnetizable layer essentially consisting of magnetic material finely divided in an organic polymer binder, a dispersant, a lubricant and further conventional additives.

公开(公告)号：DE3760432D1

公开(公告)日：1989-09-14

申请号：DE3760432

申请日：1987-04-18

Applicant: BASF AG

Inventor： MELZER MILENA ,  MEYER BERND DR ,  SOMMERMANN FRIEDRICH DR ,  KLUMPP PETER ,  KREITNER LUDWIG DR ,  LENZ WERNER DR

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/71