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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.
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公开(公告)号：DE3372553D1
公开(公告)日：1987-08-20
申请号：DE3372553
申请日：1983-08-04
Applicant: BASF AG
Inventor： ROLLER HERMANN , BALZ WERNER DR , BAUR REINHOLD , SOMMERMANN FRIEDRICH DR , GUTERMANN WINFRIED
IPC: C09D5/23 , C09D7/12 , C09D167/00 , C09D171/00 , C09D171/12 , C09D175/00 , C09D175/04 , C09D175/06 , G11B5/70 , G11B5/702 , G11B5/73 , G11B5/735
Abstract: 1. A flexible magnetic recording medium which comprises a polyethylene terephthalate film as the base, a magnetic layer which is applied to one side of the base and consists of anisotropic magnetic material dispersed in an organic binder, and a conductive backing coating which is one the side of the base opposite to the magnetic layer and consists of non-magnetizable conductive and non-conductive solids finely dispersed in a binder, wherein the binder for the backing coating consists of a mixture of (a) from 20 to 45 parts by weight of a linear saturated polyester resin, (b) from 10 to 45 parts by weight of a polyurethane resin, (c) from 15 to 45 parts by weight of a polyphenoxy resin, and (d) from 5 to 30 parts by weight of a linear polyesterurethane resin.
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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
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.
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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%.
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公开(公告)号：DE3347532A1
公开(公告)日：1985-07-11
申请号：DE3347532
申请日：1983-12-30
Applicant: BASF AG
Inventor： LEHNER AUGUST , KOHL ALBERT , BALZ WERNER DR , SOMMERMANN FRIEDRICH DR , VELIC MILAN DR , GRAU WERNER DR , BAUR REINHOLD DR
IPC: C09D5/23 , C09D7/12 , C10M105/24 , C10N10/04 , C10N40/18 , G11B5/71 , G11B5/72 , G11B5/68 , H01F10/28 , C09D3/727 , B05D5/12
Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, one or more firmly adhering magnetizable layers based on magnetic material finely dispersed in a polymeric binder, at least one lubricant and further conventional additives, wherein the lubricant used is zinc stearate which has been rendered hydrophilic.
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Patent Agency Ranking
公开(公告)号：DE3325556A1
公开(公告)日：1985-01-24
申请号：DE3325556
申请日：1983-07-15
Applicant: BASF AG
Inventor： ROLLER HERMANN , LEHNER AUGUST , HACK JOACHIM , GRAU WERNER DR , BALZ WERNER DR , BAUR REINHOLD DR
IPC: G11B5/842 , C09D5/23 , C09D7/12 , G11B5/70 , G11B5/702 , G11B5/73 , G11B5/735 , G11B5/84 , G11B5/68 , C09D3/16 , C09D3/72 , B05D5/12
Abstract: Magnetic recording media which have a thin backing coating and consist of a non-magnetic flexible base and a magnetic layer which is applied to one side of the base and comprises magnetic material finely dispersed in an organic binder are produced by applying a dispersion of finely divided non-magnetizable conductive and non-conductive solids and conventional additives in a solution of a polymeric binder in an organic solvent to that side of the base which is opposite the magnetic layer by means of a knife-coater, and then drying the layer, a high molecular weight organic compound which acts as a thickener being added to the backing coating dispersion.
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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
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.
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公开(公告)号：DE3163612D1
公开(公告)日：1984-06-20
申请号：DE3163612
申请日：1981-06-15
Applicant: BASF AG
Inventor： STECK WERNER DR , ROLLER HERMANN , SARNECKI WILHELM DR , BALZ WERNER DR
Abstract: Ferromagnetic metal particles, consisting essentially of iron and comprising a core, containing not less than 85% by weight of metallic iron, and an iron oxide plus chromium oxide surface layer surrounding this core, which layer additionally contains one or more elements selected from the group comprising zinc, phosphorus in the form of phosphate, aluminum, calcium, strontium, barium, cadmium, lead, cobalt and nickel in a total amount of not more than 9.5% by weight, based on the total amount of the metal particles, and a process for the production of such particles.
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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
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.
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公开(公告)号：DE3380753D1
公开(公告)日：1989-11-23
申请号：DE3380753
申请日：1983-07-11
Applicant: BASF AG
Inventor： LEHNER AUGUST , BALZ WERNER DR , LENZ WERNER DR , KOPKE HELMUT , BACHMANN RUDOLF DR , VELIC MILAN DR , MELZER MILENA , HARTMANN HEINRICH DR , BAUR REINHOLD DR
IPC: C08G18/10 , C08G18/12 , C08G18/65 , C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702
Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer which consists of a dispersion of an anisotropic magnetic material in an organic binder which consists essentially of an OH-containing polyurea-urethane binder crosslinked with polyisocyanate. The OH-containing polyurea-urethane is obtained by reacting a polydiol, a diol and a primary or secondary aminoalcohol, and if appropriate a triol, with a diisocyanate.
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