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公开(公告)号：DE3912082A1
公开(公告)日：1990-10-18
申请号：DE3912082
申请日：1989-04-13
Applicant: BASF AG
Inventor： PLATZ HORST , ENGELHARDT PETER , SOMMERMANN FRIEDRICH DR , KOHL ALBERT , KLAUSMANN JUERGEN , BAUR REINHOLD DR , HEILMANN PETER DR , ROLLER HERMANN
Abstract: The invention relates to a process for the production of magnetic recording media by dispersing pulverulent, magnetic material in a mixture of solvents, organic polymer binders, dispersants and further customary additives in a stirred ball mill, followed by aftertreatment in a ball mill filled with grinding media, application of the resulting dispersion as a layer on a substrate and subsequent solidification of the layer.
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公开(公告)号：DE3230394A1
公开(公告)日：1984-02-16
申请号：DE3230394
申请日：1982-08-14
Applicant: BASF AG
Inventor： ROLLER HERMANN , BALZ WERNER DR , BAUR REINHOLD DR , 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 , G11B5/68 , C08J7/04 , C08J5/18 , C09D3/49 , C09D5/24
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：DE3929168A1
公开(公告)日：1991-03-07
申请号：DE3929168
申请日：1989-09-02
Applicant: BASF AG
Inventor： BOBRICH MICHAEL DR , LEHNER AUGUST , ROLLER HERMANN , SUETTINGER RUDOLF DR , KEPPELER UWE DR , LENZ WERNER DR , SCHULZ GUENTHER DR , KOHL ALBERT
IPC: C08G18/12 , C08G18/61 , C08G18/65 , C08G18/66 , C08G18/76 , C08L75/04 , C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702
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公开(公告)号：DE3927659A1
公开(公告)日：1991-02-28
申请号：DE3927659
申请日：1989-08-22
Applicant: BASF AG
Inventor： KEPPELER UWE DR , BOBRICH MICHAEL DR , HEIL GUENTER DR , ROLLER HERMANN , LEHNER AUGUST , LENZ WERNER DR , SCHULZ GUENTHER DR
IPC: C08G18/12 , C08G18/66 , C08G18/76 , C08L75/04 , C09D5/23 , C09D175/00 , C09D175/04 , C09D177/02 , C09D179/08 , G11B5/702
Abstract: The invention relates to magnetic recording media, consisting of a nonmagnetic substrate and at least one magnetisable layer applied firmly thereon and based on a polyurethane binder, the binder consisting of at least 50% by weight of a branched polyurethane elastomer having urea groups at the chain ends.
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公开(公告)号：DE3843445A1
公开(公告)日：1990-06-28
申请号：DE3843445
申请日：1988-12-23
Applicant: BASF AG
Inventor： LEHNER AUGUST , SUETTINGER RUDOLF DR , BOBRICH MICHAEL DR , DIKOW HERMANN DR , ROLLER HERMANN , LENZ WERNER DR , KREITNER LUDWIG DR , LOCH WERNER DR , SCHNEIDER NORBERT
IPC: C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/702 , G11B5/706
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Patent Agency Ranking
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：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：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：CA1028208A
公开(公告)日：1978-03-21
申请号：CA209635
申请日：1974-09-18
Applicant: BASF AG
Inventor： NEUMANN UTE , ROLLER HERMANN , HARTMANN JOB-WERNER , HACK JOACHIM , MOTZ HERBERT , OSTERTAG WERNER
Abstract: Coated magnetic recording media, especially video tapes and computer tapes, comprising a non-magnetic base carrying a magnetic coating which consists of a dispersion, essentially containing a finely divided magnetic pigment in an organic binder and at least one lubricant. A compound of the formula in which n is an integer of from 1 to 3 and R is alkyl, alkoxyalkyl or aralkyl, each of 3 to 18 carbon atoms, is used as a lubricant. The products have high abrasion resistance coupled with only little transfer of material to the magnetic heads even under fluctuating climatic conditions.
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公开(公告)号：DE2352983A1
公开(公告)日：1975-04-30
申请号：DE2352983
申请日：1973-10-23
Applicant: BASF AG
Inventor： ROLLER HERMANN , HARTMANN JOB-WERNER DIPL-CHEM , HACK JOACHIM DIPL-ING , OSTERTAG WERNER DIPL-CHEM DR
Abstract: Magnetic layer for laminated magnetograms consists of a dispersion of a finely divided magnetic pigment in a mixt of (I) 35-55 wt. % polyurethane elastomer that is soluble in a volatile org. solvent, is practically free of isocyanate gps, and has a Shore A hardness of 70-80, (II) 35-55 wt. % polyurethane elastomer that is soluble in a volatile org. solvent is practically free of isocyanate gps, and has a Shore A hardness of 90-100, and (III) 0-35 wt. % additional polymerix binder. Good resistance to magnetic heads is obtd with very slight abrasion of magnetic heads. Gives magnetic layers with good magneto-electric properties. I and II are pref. prepd from aliphatic polyester polyols aromatic diisocyanates and opt. 2-8C aliphatic diols. III is pref. a polyepoxide resin prepd. from 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin.
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