公开(公告)号：DE3675989D1

公开(公告)日：1991-01-17

申请号：DE3675989

申请日：1986-06-19

Applicant: BASF AG

Inventor： GRAU WERNER DR ,  KOHL ALBERT ,  KOVACS JENOE DR ,  BALZ WERNER DR ,  MUENZNER WULF DR

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/72 ,  G11B5/84

Abstract: Magnetic recording media, consisting of a non-magnetic base and a magnetic layer firmly bonded thereto, exhibit improved properties in sustained operation if, in the course of their production, a dispersion of inorganic particles in a solvent is applied to the magnetic layer, and the solvent is then removed.

公开(公告)号：DE3472321D1

公开(公告)日：1988-07-28

申请号：DE3472321

申请日：1984-09-05

Applicant: BASF AG

Inventor： HEIL GUENTER DR ,  LENZ WERNER DR ,  KOVACS JENOE DR

IPC: C08F2/46 ,  C09D5/23 ,  C09D163/00 ,  C09D175/04 ,  C09D175/14 ,  G11B5/702

Abstract: Magnetic recording media comprising a non-magnetic base and one or more magnetic layers consisting of an organic binder matrix containing finely divided magnetic material, the said matrix being obtained by electron beam curing of a mixture of from 60 to 100% by weight of a polyurethane acrylate polymer possessing polymerizable double bonds and from 0 to 40% by weight of an acrylate and/or an acrylate prepolymer and/or an N-vinyl monomer and/or an N-vinyl prepolymer.

公开(公告)号：DE3562304D1

公开(公告)日：1988-05-26

申请号：DE3562304

申请日：1985-07-22

Applicant: BASF AG

Inventor： LEHNER AUGUST ,  HEIL GUENTER DR ,  KOVACS JENOE DR ,  BALZ WERNER DR ,  LENZ WERNER DR

IPC: C09D5/23 ,  C09D175/04 ,  C09D175/14 ,  G11B5/702

Abstract: Magnetic recording media comprising a non-magnetic substrate and a magnetic layer comprising a finely divided magnetic material dispersed in an organic solvent soluble, crosslinkable, essentially linear, thermoplastic polyurethane which possesses acrylate side and terminal groups wherein said polyurethane is prepared by reacting poly- and/or diisocyanates with a mixture of (a) methacrylate - or acrylate - diols having molecular weights of from 146 to 3,000, (b) monoesters of methacrylic or acrylic acid and a diol having a molecular weight of from 116 to 300, and (c) other organic polydiol compounds which have molecular weights of from 400 to 5,000.

公开(公告)号：DE3465389D1

公开(公告)日：1987-09-17

申请号：DE3465389

申请日：1984-09-06

Applicant: BASF AG

Inventor： HEIL GUENTER DR ,  SPOOR HERBERT DR ,  LENZ WERNER DR ,  KOVACS JENOE DR ,  GRAU WERNER DR ,  BALZ WERNER DR ,  LEHNER AUGUST

IPC: C08F2/46 ,  C08F283/04 ,  C08G18/67 ,  C08L75/04 ,  C09D5/23 ,  C09D163/00 ,  C09D171/00 ,  C09D171/12 ,  C09D175/04 ,  C09D175/14 ,  G11B5/702

Abstract: Magnetic recording media comprise a non-magnetic base and one or more magnetic layers consisting of an organic binder matrix containing finely divided magnetic material, the said matrix being obtained by electron beam curing of a mixture of from 50 to 100% by weight of a polyurethane acrylate polymer possessing polymerizable double bonds and from 0 to 50% by weight of an acrylate and/or an acrylate prepolymer and/or an N-vinyl monomer and/or an N-vinyl prepolymer.

公开(公告)号：DE3522681A1

公开(公告)日：1987-01-08

申请号：DE3522681

申请日：1985-06-25

Applicant: BASF AG

Inventor： GRAU WERNER DR ,  KOHL ALBERT ,  KOVACS JENOE DR ,  BALZ WERNER DR ,  MUENZNER WULF DR

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/72 ,  G11B5/84 ,  G11B5/71 ,  B05D5/12

Abstract: Magnetic recording media, consisting of a non-magnetic base and a magnetic layer firmly bonded thereto, exhibit improved properties in sustained operation if, in the course of their production, a dispersion of inorganic particles in a solvent is applied to the magnetic layer, and the solvent is then removed.

公开(公告)号：DE3362783D1

公开(公告)日：1986-05-07

申请号：DE3362783

申请日：1983-07-11

Applicant: BASF AG

Inventor： KOVACS JENOE DR ,  KOHL ALBERT

IPC: C09D5/23 ,  C09D101/18 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

公开(公告)号：DE3361135D1

公开(公告)日：1985-12-12

申请号：DE3361135

申请日：1983-01-22

Applicant: BASF AG

Inventor： RUDOLF PETER DR ,  KOVACS JENOE DR ,  VAETH GUENTER ,  OHLINGER MANFRED DR

IPC: C01G49/00 ,  C01G49/06 ,  C09D5/23 ,  G11B5/62 ,  G11B5/706 ,  H01F1/11

Abstract: A modified acicular ferrimagnetic iron oxide which consists of a core of gamma-iron(III) oxide and a surrounding shell of gamma-iron(III) oxide modified by tin dioxide and carbon, and a process for its preparation.

公开(公告)号：DE3322746A1

公开(公告)日：1985-01-03

申请号：DE3322746

申请日：1983-06-24

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  BAUR REINHOLD DR ,  FESER RAINER DR ,  JAKUSCH HELMUT DR ,  KOVACS JENOE DR ,  OHLINGER MANFRED DR ,  RUDOLF PETER DR

IPC: G11B5/706 ,  G11B5/714 ,  G11B5/64 ,  G11B5/72

Abstract: The invention relates to a magnetic recording base made of a nonmagnetic base material and a magnetic layer which is applied thereto and is essentially composed of anisotropic magnetic materials which are finely dispersed in an inorganic polymer and are composed of a mixture of needle-shaped cobalt-modified iron oxide and chromium dioxide.

公开(公告)号：CH603773A5

公开(公告)日：1978-08-31

申请号：CH1052776

申请日：1976-08-18

Applicant: BASF AG

Inventor： KOVACS JENOE DR ,  MARX MATTHIAS DR ,  FABIAN WOLFGANG DR ,  SPOOR HERBERT DR ,  JUNG HANS DR

IPC: C08G18/80 ,  C08J3/05 ,  C08J3/07 ,  C09D5/25 ,  H01B3/30 ,  C09D3/66 ,  C09D3/72

公开(公告)号：DE2159935A1

公开(公告)日：1973-06-14

申请号：DE2159935

申请日：1971-12-03

Applicant: BASF AG

Inventor： KOVACS JENOE DR ,  EISFELD WOLFGANG DR

IPC: C08G73/00 ,  C08G73/10 ,  C08J5/24 ,  C08G20/32